9255 lines
255 KiB
C
9255 lines
255 KiB
C
/* Remote target communications for serial-line targets in custom GDB protocol
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Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* See the GDB User Guide for details of the GDB remote protocol. */
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#include "defs.h"
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#include "gdb_string.h"
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#include <ctype.h>
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#include <fcntl.h>
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#include "inferior.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "exceptions.h"
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#include "target.h"
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/*#include "terminal.h" */
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#include "gdbcmd.h"
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#include "objfiles.h"
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#include "gdb-stabs.h"
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#include "gdbthread.h"
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#include "remote.h"
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#include "regcache.h"
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#include "value.h"
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#include "gdb_assert.h"
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#include "observer.h"
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#include "solib.h"
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#include "cli/cli-decode.h"
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#include "cli/cli-setshow.h"
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#include "target-descriptions.h"
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#include <ctype.h>
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#include <sys/time.h>
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#include "event-loop.h"
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#include "event-top.h"
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#include "inf-loop.h"
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#include <signal.h>
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#include "serial.h"
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#include "gdbcore.h" /* for exec_bfd */
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#include "remote-fileio.h"
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#include "gdb/fileio.h"
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#include "gdb_stat.h"
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#include "memory-map.h"
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/* The size to align memory write packets, when practical. The protocol
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does not guarantee any alignment, and gdb will generate short
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writes and unaligned writes, but even as a best-effort attempt this
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can improve bulk transfers. For instance, if a write is misaligned
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relative to the target's data bus, the stub may need to make an extra
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round trip fetching data from the target. This doesn't make a
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huge difference, but it's easy to do, so we try to be helpful.
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The alignment chosen is arbitrary; usually data bus width is
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important here, not the possibly larger cache line size. */
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enum { REMOTE_ALIGN_WRITES = 16 };
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/* Prototypes for local functions. */
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static void cleanup_sigint_signal_handler (void *dummy);
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static void initialize_sigint_signal_handler (void);
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static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
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static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
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int forever);
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static void handle_remote_sigint (int);
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static void handle_remote_sigint_twice (int);
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static void async_remote_interrupt (gdb_client_data);
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void async_remote_interrupt_twice (gdb_client_data);
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static void remote_files_info (struct target_ops *ignore);
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static void remote_prepare_to_store (struct regcache *regcache);
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static void remote_open (char *name, int from_tty);
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static void extended_remote_open (char *name, int from_tty);
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static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
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static void remote_close (int quitting);
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static void remote_mourn (struct target_ops *ops);
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static void extended_remote_restart (void);
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static void extended_remote_mourn (struct target_ops *);
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static void remote_mourn_1 (struct target_ops *);
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static void remote_send (char **buf, long *sizeof_buf_p);
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static int readchar (int timeout);
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static void remote_kill (struct target_ops *ops);
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static int tohex (int nib);
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static int remote_can_async_p (void);
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static int remote_is_async_p (void);
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static void remote_async (void (*callback) (enum inferior_event_type event_type,
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void *context), void *context);
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static int remote_async_mask (int new_mask);
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static void remote_detach (struct target_ops *ops, char *args, int from_tty);
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static void remote_interrupt (int signo);
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static void remote_interrupt_twice (int signo);
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static void interrupt_query (void);
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static void set_general_thread (struct ptid ptid);
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static void set_continue_thread (struct ptid ptid);
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static void get_offsets (void);
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static void skip_frame (void);
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static long read_frame (char **buf_p, long *sizeof_buf);
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static int hexnumlen (ULONGEST num);
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static void init_remote_ops (void);
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static void init_extended_remote_ops (void);
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static void remote_stop (ptid_t);
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static int ishex (int ch, int *val);
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static int stubhex (int ch);
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static int hexnumstr (char *, ULONGEST);
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static int hexnumnstr (char *, ULONGEST, int);
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static CORE_ADDR remote_address_masked (CORE_ADDR);
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static void print_packet (char *);
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static unsigned long crc32 (unsigned char *, int, unsigned int);
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static void compare_sections_command (char *, int);
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static void packet_command (char *, int);
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static int stub_unpack_int (char *buff, int fieldlength);
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static ptid_t remote_current_thread (ptid_t oldptid);
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static void remote_find_new_threads (void);
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static void record_currthread (ptid_t currthread);
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static int fromhex (int a);
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static int hex2bin (const char *hex, gdb_byte *bin, int count);
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static int bin2hex (const gdb_byte *bin, char *hex, int count);
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static int putpkt_binary (char *buf, int cnt);
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static void check_binary_download (CORE_ADDR addr);
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struct packet_config;
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static void show_packet_config_cmd (struct packet_config *config);
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static void update_packet_config (struct packet_config *config);
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static void set_remote_protocol_packet_cmd (char *args, int from_tty,
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struct cmd_list_element *c);
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static void show_remote_protocol_packet_cmd (struct ui_file *file,
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int from_tty,
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struct cmd_list_element *c,
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const char *value);
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static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
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static ptid_t read_ptid (char *buf, char **obuf);
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static void remote_query_supported (void);
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static void remote_check_symbols (struct objfile *objfile);
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void _initialize_remote (void);
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struct stop_reply;
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static struct stop_reply *stop_reply_xmalloc (void);
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static void stop_reply_xfree (struct stop_reply *);
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static void do_stop_reply_xfree (void *arg);
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static void remote_parse_stop_reply (char *buf, struct stop_reply *);
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static void push_stop_reply (struct stop_reply *);
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static void remote_get_pending_stop_replies (void);
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static void discard_pending_stop_replies (int pid);
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static int peek_stop_reply (ptid_t ptid);
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static void remote_async_inferior_event_handler (gdb_client_data);
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static void remote_async_get_pending_events_handler (gdb_client_data);
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static void remote_terminal_ours (void);
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static int remote_read_description_p (struct target_ops *target);
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/* The non-stop remote protocol provisions for one pending stop reply.
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This is where we keep it until it is acknowledged. */
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static struct stop_reply *pending_stop_reply = NULL;
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/* For "remote". */
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static struct cmd_list_element *remote_cmdlist;
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/* For "set remote" and "show remote". */
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static struct cmd_list_element *remote_set_cmdlist;
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static struct cmd_list_element *remote_show_cmdlist;
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/* Description of the remote protocol state for the currently
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connected target. This is per-target state, and independent of the
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selected architecture. */
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struct remote_state
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{
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/* A buffer to use for incoming packets, and its current size. The
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buffer is grown dynamically for larger incoming packets.
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Outgoing packets may also be constructed in this buffer.
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BUF_SIZE is always at least REMOTE_PACKET_SIZE;
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REMOTE_PACKET_SIZE should be used to limit the length of outgoing
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packets. */
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char *buf;
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long buf_size;
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/* If we negotiated packet size explicitly (and thus can bypass
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heuristics for the largest packet size that will not overflow
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a buffer in the stub), this will be set to that packet size.
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Otherwise zero, meaning to use the guessed size. */
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long explicit_packet_size;
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/* remote_wait is normally called when the target is running and
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waits for a stop reply packet. But sometimes we need to call it
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when the target is already stopped. We can send a "?" packet
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and have remote_wait read the response. Or, if we already have
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the response, we can stash it in BUF and tell remote_wait to
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skip calling getpkt. This flag is set when BUF contains a
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stop reply packet and the target is not waiting. */
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int cached_wait_status;
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/* True, if in no ack mode. That is, neither GDB nor the stub will
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expect acks from each other. The connection is assumed to be
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reliable. */
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int noack_mode;
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/* True if we're connected in extended remote mode. */
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int extended;
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/* True if the stub reported support for multi-process
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extensions. */
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int multi_process_aware;
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/* True if we resumed the target and we're waiting for the target to
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stop. In the mean time, we can't start another command/query.
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The remote server wouldn't be ready to process it, so we'd
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timeout waiting for a reply that would never come and eventually
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we'd close the connection. This can happen in asynchronous mode
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because we allow GDB commands while the target is running. */
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int waiting_for_stop_reply;
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/* True if the stub reports support for non-stop mode. */
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int non_stop_aware;
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/* True if the stub reports support for vCont;t. */
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int support_vCont_t;
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/* True if the stub reports support for conditional tracepoints. */
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int cond_tracepoints;
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};
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/* Returns true if the multi-process extensions are in effect. */
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static int
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remote_multi_process_p (struct remote_state *rs)
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{
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return rs->extended && rs->multi_process_aware;
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}
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/* This data could be associated with a target, but we do not always
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have access to the current target when we need it, so for now it is
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static. This will be fine for as long as only one target is in use
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at a time. */
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static struct remote_state remote_state;
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static struct remote_state *
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get_remote_state_raw (void)
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{
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return &remote_state;
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}
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/* Description of the remote protocol for a given architecture. */
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struct packet_reg
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{
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long offset; /* Offset into G packet. */
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long regnum; /* GDB's internal register number. */
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LONGEST pnum; /* Remote protocol register number. */
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int in_g_packet; /* Always part of G packet. */
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/* long size in bytes; == register_size (target_gdbarch, regnum);
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at present. */
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/* char *name; == gdbarch_register_name (target_gdbarch, regnum);
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at present. */
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};
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struct remote_arch_state
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{
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/* Description of the remote protocol registers. */
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long sizeof_g_packet;
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/* Description of the remote protocol registers indexed by REGNUM
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(making an array gdbarch_num_regs in size). */
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struct packet_reg *regs;
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/* This is the size (in chars) of the first response to the ``g''
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packet. It is used as a heuristic when determining the maximum
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size of memory-read and memory-write packets. A target will
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typically only reserve a buffer large enough to hold the ``g''
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packet. The size does not include packet overhead (headers and
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trailers). */
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long actual_register_packet_size;
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/* This is the maximum size (in chars) of a non read/write packet.
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It is also used as a cap on the size of read/write packets. */
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long remote_packet_size;
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};
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/* Handle for retreving the remote protocol data from gdbarch. */
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static struct gdbarch_data *remote_gdbarch_data_handle;
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static struct remote_arch_state *
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get_remote_arch_state (void)
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{
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return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle);
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}
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/* Fetch the global remote target state. */
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static struct remote_state *
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get_remote_state (void)
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{
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/* Make sure that the remote architecture state has been
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initialized, because doing so might reallocate rs->buf. Any
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function which calls getpkt also needs to be mindful of changes
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to rs->buf, but this call limits the number of places which run
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into trouble. */
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get_remote_arch_state ();
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return get_remote_state_raw ();
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}
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static int
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compare_pnums (const void *lhs_, const void *rhs_)
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{
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const struct packet_reg * const *lhs = lhs_;
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const struct packet_reg * const *rhs = rhs_;
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if ((*lhs)->pnum < (*rhs)->pnum)
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return -1;
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else if ((*lhs)->pnum == (*rhs)->pnum)
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return 0;
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else
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return 1;
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}
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static void *
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init_remote_state (struct gdbarch *gdbarch)
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{
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int regnum, num_remote_regs, offset;
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struct remote_state *rs = get_remote_state_raw ();
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struct remote_arch_state *rsa;
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struct packet_reg **remote_regs;
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rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
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/* Use the architecture to build a regnum<->pnum table, which will be
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1:1 unless a feature set specifies otherwise. */
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rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
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gdbarch_num_regs (gdbarch),
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struct packet_reg);
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for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
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{
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struct packet_reg *r = &rsa->regs[regnum];
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if (register_size (gdbarch, regnum) == 0)
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/* Do not try to fetch zero-sized (placeholder) registers. */
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r->pnum = -1;
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else
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r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
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r->regnum = regnum;
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}
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/* Define the g/G packet format as the contents of each register
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with a remote protocol number, in order of ascending protocol
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number. */
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remote_regs = alloca (gdbarch_num_regs (gdbarch)
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* sizeof (struct packet_reg *));
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for (num_remote_regs = 0, regnum = 0;
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regnum < gdbarch_num_regs (gdbarch);
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regnum++)
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if (rsa->regs[regnum].pnum != -1)
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remote_regs[num_remote_regs++] = &rsa->regs[regnum];
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qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
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compare_pnums);
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for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
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{
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remote_regs[regnum]->in_g_packet = 1;
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remote_regs[regnum]->offset = offset;
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offset += register_size (gdbarch, remote_regs[regnum]->regnum);
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}
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/* Record the maximum possible size of the g packet - it may turn out
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to be smaller. */
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rsa->sizeof_g_packet = offset;
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/* Default maximum number of characters in a packet body. Many
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remote stubs have a hardwired buffer size of 400 bytes
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(c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
|
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as the maximum packet-size to ensure that the packet and an extra
|
||
NUL character can always fit in the buffer. This stops GDB
|
||
trashing stubs that try to squeeze an extra NUL into what is
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already a full buffer (As of 1999-12-04 that was most stubs). */
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rsa->remote_packet_size = 400 - 1;
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|
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/* This one is filled in when a ``g'' packet is received. */
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rsa->actual_register_packet_size = 0;
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||
|
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/* Should rsa->sizeof_g_packet needs more space than the
|
||
default, adjust the size accordingly. Remember that each byte is
|
||
encoded as two characters. 32 is the overhead for the packet
|
||
header / footer. NOTE: cagney/1999-10-26: I suspect that 8
|
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(``$NN:G...#NN'') is a better guess, the below has been padded a
|
||
little. */
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if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
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rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
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|
||
/* Make sure that the packet buffer is plenty big enough for
|
||
this architecture. */
|
||
if (rs->buf_size < rsa->remote_packet_size)
|
||
{
|
||
rs->buf_size = 2 * rsa->remote_packet_size;
|
||
rs->buf = xrealloc (rs->buf, rs->buf_size);
|
||
}
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return rsa;
|
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}
|
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|
||
/* Return the current allowed size of a remote packet. This is
|
||
inferred from the current architecture, and should be used to
|
||
limit the length of outgoing packets. */
|
||
static long
|
||
get_remote_packet_size (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
|
||
if (rs->explicit_packet_size)
|
||
return rs->explicit_packet_size;
|
||
|
||
return rsa->remote_packet_size;
|
||
}
|
||
|
||
static struct packet_reg *
|
||
packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
|
||
{
|
||
if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch))
|
||
return NULL;
|
||
else
|
||
{
|
||
struct packet_reg *r = &rsa->regs[regnum];
|
||
gdb_assert (r->regnum == regnum);
|
||
return r;
|
||
}
|
||
}
|
||
|
||
static struct packet_reg *
|
||
packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
|
||
{
|
||
int i;
|
||
for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++)
|
||
{
|
||
struct packet_reg *r = &rsa->regs[i];
|
||
if (r->pnum == pnum)
|
||
return r;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* FIXME: graces/2002-08-08: These variables should eventually be
|
||
bound to an instance of the target object (as in gdbarch-tdep()),
|
||
when such a thing exists. */
|
||
|
||
/* This is set to the data address of the access causing the target
|
||
to stop for a watchpoint. */
|
||
static CORE_ADDR remote_watch_data_address;
|
||
|
||
/* This is non-zero if target stopped for a watchpoint. */
|
||
static int remote_stopped_by_watchpoint_p;
|
||
|
||
static struct target_ops remote_ops;
|
||
|
||
static struct target_ops extended_remote_ops;
|
||
|
||
static int remote_async_mask_value = 1;
|
||
|
||
/* FIXME: cagney/1999-09-23: Even though getpkt was called with
|
||
``forever'' still use the normal timeout mechanism. This is
|
||
currently used by the ASYNC code to guarentee that target reads
|
||
during the initial connect always time-out. Once getpkt has been
|
||
modified to return a timeout indication and, in turn
|
||
remote_wait()/wait_for_inferior() have gained a timeout parameter
|
||
this can go away. */
|
||
static int wait_forever_enabled_p = 1;
|
||
|
||
|
||
/* This variable chooses whether to send a ^C or a break when the user
|
||
requests program interruption. Although ^C is usually what remote
|
||
systems expect, and that is the default here, sometimes a break is
|
||
preferable instead. */
|
||
|
||
static int remote_break;
|
||
|
||
/* Descriptor for I/O to remote machine. Initialize it to NULL so that
|
||
remote_open knows that we don't have a file open when the program
|
||
starts. */
|
||
static struct serial *remote_desc = NULL;
|
||
|
||
/* This variable sets the number of bits in an address that are to be
|
||
sent in a memory ("M" or "m") packet. Normally, after stripping
|
||
leading zeros, the entire address would be sent. This variable
|
||
restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
|
||
initial implementation of remote.c restricted the address sent in
|
||
memory packets to ``host::sizeof long'' bytes - (typically 32
|
||
bits). Consequently, for 64 bit targets, the upper 32 bits of an
|
||
address was never sent. Since fixing this bug may cause a break in
|
||
some remote targets this variable is principly provided to
|
||
facilitate backward compatibility. */
|
||
|
||
static int remote_address_size;
|
||
|
||
/* Temporary to track who currently owns the terminal. See
|
||
remote_terminal_* for more details. */
|
||
|
||
static int remote_async_terminal_ours_p;
|
||
|
||
/* The executable file to use for "run" on the remote side. */
|
||
|
||
static char *remote_exec_file = "";
|
||
|
||
|
||
/* User configurable variables for the number of characters in a
|
||
memory read/write packet. MIN (rsa->remote_packet_size,
|
||
rsa->sizeof_g_packet) is the default. Some targets need smaller
|
||
values (fifo overruns, et.al.) and some users need larger values
|
||
(speed up transfers). The variables ``preferred_*'' (the user
|
||
request), ``current_*'' (what was actually set) and ``forced_*''
|
||
(Positive - a soft limit, negative - a hard limit). */
|
||
|
||
struct memory_packet_config
|
||
{
|
||
char *name;
|
||
long size;
|
||
int fixed_p;
|
||
};
|
||
|
||
/* Compute the current size of a read/write packet. Since this makes
|
||
use of ``actual_register_packet_size'' the computation is dynamic. */
|
||
|
||
static long
|
||
get_memory_packet_size (struct memory_packet_config *config)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
|
||
/* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
|
||
law?) that some hosts don't cope very well with large alloca()
|
||
calls. Eventually the alloca() code will be replaced by calls to
|
||
xmalloc() and make_cleanups() allowing this restriction to either
|
||
be lifted or removed. */
|
||
#ifndef MAX_REMOTE_PACKET_SIZE
|
||
#define MAX_REMOTE_PACKET_SIZE 16384
|
||
#endif
|
||
/* NOTE: 20 ensures we can write at least one byte. */
|
||
#ifndef MIN_REMOTE_PACKET_SIZE
|
||
#define MIN_REMOTE_PACKET_SIZE 20
|
||
#endif
|
||
long what_they_get;
|
||
if (config->fixed_p)
|
||
{
|
||
if (config->size <= 0)
|
||
what_they_get = MAX_REMOTE_PACKET_SIZE;
|
||
else
|
||
what_they_get = config->size;
|
||
}
|
||
else
|
||
{
|
||
what_they_get = get_remote_packet_size ();
|
||
/* Limit the packet to the size specified by the user. */
|
||
if (config->size > 0
|
||
&& what_they_get > config->size)
|
||
what_they_get = config->size;
|
||
|
||
/* Limit it to the size of the targets ``g'' response unless we have
|
||
permission from the stub to use a larger packet size. */
|
||
if (rs->explicit_packet_size == 0
|
||
&& rsa->actual_register_packet_size > 0
|
||
&& what_they_get > rsa->actual_register_packet_size)
|
||
what_they_get = rsa->actual_register_packet_size;
|
||
}
|
||
if (what_they_get > MAX_REMOTE_PACKET_SIZE)
|
||
what_they_get = MAX_REMOTE_PACKET_SIZE;
|
||
if (what_they_get < MIN_REMOTE_PACKET_SIZE)
|
||
what_they_get = MIN_REMOTE_PACKET_SIZE;
|
||
|
||
/* Make sure there is room in the global buffer for this packet
|
||
(including its trailing NUL byte). */
|
||
if (rs->buf_size < what_they_get + 1)
|
||
{
|
||
rs->buf_size = 2 * what_they_get;
|
||
rs->buf = xrealloc (rs->buf, 2 * what_they_get);
|
||
}
|
||
|
||
return what_they_get;
|
||
}
|
||
|
||
/* Update the size of a read/write packet. If they user wants
|
||
something really big then do a sanity check. */
|
||
|
||
static void
|
||
set_memory_packet_size (char *args, struct memory_packet_config *config)
|
||
{
|
||
int fixed_p = config->fixed_p;
|
||
long size = config->size;
|
||
if (args == NULL)
|
||
error (_("Argument required (integer, `fixed' or `limited')."));
|
||
else if (strcmp (args, "hard") == 0
|
||
|| strcmp (args, "fixed") == 0)
|
||
fixed_p = 1;
|
||
else if (strcmp (args, "soft") == 0
|
||
|| strcmp (args, "limit") == 0)
|
||
fixed_p = 0;
|
||
else
|
||
{
|
||
char *end;
|
||
size = strtoul (args, &end, 0);
|
||
if (args == end)
|
||
error (_("Invalid %s (bad syntax)."), config->name);
|
||
#if 0
|
||
/* Instead of explicitly capping the size of a packet to
|
||
MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
|
||
instead allowed to set the size to something arbitrarily
|
||
large. */
|
||
if (size > MAX_REMOTE_PACKET_SIZE)
|
||
error (_("Invalid %s (too large)."), config->name);
|
||
#endif
|
||
}
|
||
/* Extra checks? */
|
||
if (fixed_p && !config->fixed_p)
|
||
{
|
||
if (! query (_("The target may not be able to correctly handle a %s\n"
|
||
"of %ld bytes. Change the packet size? "),
|
||
config->name, size))
|
||
error (_("Packet size not changed."));
|
||
}
|
||
/* Update the config. */
|
||
config->fixed_p = fixed_p;
|
||
config->size = size;
|
||
}
|
||
|
||
static void
|
||
show_memory_packet_size (struct memory_packet_config *config)
|
||
{
|
||
printf_filtered (_("The %s is %ld. "), config->name, config->size);
|
||
if (config->fixed_p)
|
||
printf_filtered (_("Packets are fixed at %ld bytes.\n"),
|
||
get_memory_packet_size (config));
|
||
else
|
||
printf_filtered (_("Packets are limited to %ld bytes.\n"),
|
||
get_memory_packet_size (config));
|
||
}
|
||
|
||
static struct memory_packet_config memory_write_packet_config =
|
||
{
|
||
"memory-write-packet-size",
|
||
};
|
||
|
||
static void
|
||
set_memory_write_packet_size (char *args, int from_tty)
|
||
{
|
||
set_memory_packet_size (args, &memory_write_packet_config);
|
||
}
|
||
|
||
static void
|
||
show_memory_write_packet_size (char *args, int from_tty)
|
||
{
|
||
show_memory_packet_size (&memory_write_packet_config);
|
||
}
|
||
|
||
static long
|
||
get_memory_write_packet_size (void)
|
||
{
|
||
return get_memory_packet_size (&memory_write_packet_config);
|
||
}
|
||
|
||
static struct memory_packet_config memory_read_packet_config =
|
||
{
|
||
"memory-read-packet-size",
|
||
};
|
||
|
||
static void
|
||
set_memory_read_packet_size (char *args, int from_tty)
|
||
{
|
||
set_memory_packet_size (args, &memory_read_packet_config);
|
||
}
|
||
|
||
static void
|
||
show_memory_read_packet_size (char *args, int from_tty)
|
||
{
|
||
show_memory_packet_size (&memory_read_packet_config);
|
||
}
|
||
|
||
static long
|
||
get_memory_read_packet_size (void)
|
||
{
|
||
long size = get_memory_packet_size (&memory_read_packet_config);
|
||
/* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
|
||
extra buffer size argument before the memory read size can be
|
||
increased beyond this. */
|
||
if (size > get_remote_packet_size ())
|
||
size = get_remote_packet_size ();
|
||
return size;
|
||
}
|
||
|
||
|
||
/* Generic configuration support for packets the stub optionally
|
||
supports. Allows the user to specify the use of the packet as well
|
||
as allowing GDB to auto-detect support in the remote stub. */
|
||
|
||
enum packet_support
|
||
{
|
||
PACKET_SUPPORT_UNKNOWN = 0,
|
||
PACKET_ENABLE,
|
||
PACKET_DISABLE
|
||
};
|
||
|
||
struct packet_config
|
||
{
|
||
const char *name;
|
||
const char *title;
|
||
enum auto_boolean detect;
|
||
enum packet_support support;
|
||
};
|
||
|
||
/* Analyze a packet's return value and update the packet config
|
||
accordingly. */
|
||
|
||
enum packet_result
|
||
{
|
||
PACKET_ERROR,
|
||
PACKET_OK,
|
||
PACKET_UNKNOWN
|
||
};
|
||
|
||
static void
|
||
update_packet_config (struct packet_config *config)
|
||
{
|
||
switch (config->detect)
|
||
{
|
||
case AUTO_BOOLEAN_TRUE:
|
||
config->support = PACKET_ENABLE;
|
||
break;
|
||
case AUTO_BOOLEAN_FALSE:
|
||
config->support = PACKET_DISABLE;
|
||
break;
|
||
case AUTO_BOOLEAN_AUTO:
|
||
config->support = PACKET_SUPPORT_UNKNOWN;
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
show_packet_config_cmd (struct packet_config *config)
|
||
{
|
||
char *support = "internal-error";
|
||
switch (config->support)
|
||
{
|
||
case PACKET_ENABLE:
|
||
support = "enabled";
|
||
break;
|
||
case PACKET_DISABLE:
|
||
support = "disabled";
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
support = "unknown";
|
||
break;
|
||
}
|
||
switch (config->detect)
|
||
{
|
||
case AUTO_BOOLEAN_AUTO:
|
||
printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
|
||
config->name, support);
|
||
break;
|
||
case AUTO_BOOLEAN_TRUE:
|
||
case AUTO_BOOLEAN_FALSE:
|
||
printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
|
||
config->name, support);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
add_packet_config_cmd (struct packet_config *config, const char *name,
|
||
const char *title, int legacy)
|
||
{
|
||
char *set_doc;
|
||
char *show_doc;
|
||
char *cmd_name;
|
||
|
||
config->name = name;
|
||
config->title = title;
|
||
config->detect = AUTO_BOOLEAN_AUTO;
|
||
config->support = PACKET_SUPPORT_UNKNOWN;
|
||
set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
|
||
name, title);
|
||
show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
|
||
name, title);
|
||
/* set/show TITLE-packet {auto,on,off} */
|
||
cmd_name = xstrprintf ("%s-packet", title);
|
||
add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
|
||
&config->detect, set_doc, show_doc, NULL, /* help_doc */
|
||
set_remote_protocol_packet_cmd,
|
||
show_remote_protocol_packet_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist);
|
||
/* The command code copies the documentation strings. */
|
||
xfree (set_doc);
|
||
xfree (show_doc);
|
||
/* set/show remote NAME-packet {auto,on,off} -- legacy. */
|
||
if (legacy)
|
||
{
|
||
char *legacy_name;
|
||
legacy_name = xstrprintf ("%s-packet", name);
|
||
add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
|
||
&remote_set_cmdlist);
|
||
add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
|
||
&remote_show_cmdlist);
|
||
}
|
||
}
|
||
|
||
static enum packet_result
|
||
packet_check_result (const char *buf)
|
||
{
|
||
if (buf[0] != '\0')
|
||
{
|
||
/* The stub recognized the packet request. Check that the
|
||
operation succeeded. */
|
||
if (buf[0] == 'E'
|
||
&& isxdigit (buf[1]) && isxdigit (buf[2])
|
||
&& buf[3] == '\0')
|
||
/* "Enn" - definitly an error. */
|
||
return PACKET_ERROR;
|
||
|
||
/* Always treat "E." as an error. This will be used for
|
||
more verbose error messages, such as E.memtypes. */
|
||
if (buf[0] == 'E' && buf[1] == '.')
|
||
return PACKET_ERROR;
|
||
|
||
/* The packet may or may not be OK. Just assume it is. */
|
||
return PACKET_OK;
|
||
}
|
||
else
|
||
/* The stub does not support the packet. */
|
||
return PACKET_UNKNOWN;
|
||
}
|
||
|
||
static enum packet_result
|
||
packet_ok (const char *buf, struct packet_config *config)
|
||
{
|
||
enum packet_result result;
|
||
|
||
result = packet_check_result (buf);
|
||
switch (result)
|
||
{
|
||
case PACKET_OK:
|
||
case PACKET_ERROR:
|
||
/* The stub recognized the packet request. */
|
||
switch (config->support)
|
||
{
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Packet %s (%s) is supported\n",
|
||
config->name, config->title);
|
||
config->support = PACKET_ENABLE;
|
||
break;
|
||
case PACKET_DISABLE:
|
||
internal_error (__FILE__, __LINE__,
|
||
_("packet_ok: attempt to use a disabled packet"));
|
||
break;
|
||
case PACKET_ENABLE:
|
||
break;
|
||
}
|
||
break;
|
||
case PACKET_UNKNOWN:
|
||
/* The stub does not support the packet. */
|
||
switch (config->support)
|
||
{
|
||
case PACKET_ENABLE:
|
||
if (config->detect == AUTO_BOOLEAN_AUTO)
|
||
/* If the stub previously indicated that the packet was
|
||
supported then there is a protocol error.. */
|
||
error (_("Protocol error: %s (%s) conflicting enabled responses."),
|
||
config->name, config->title);
|
||
else
|
||
/* The user set it wrong. */
|
||
error (_("Enabled packet %s (%s) not recognized by stub"),
|
||
config->name, config->title);
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Packet %s (%s) is NOT supported\n",
|
||
config->name, config->title);
|
||
config->support = PACKET_DISABLE;
|
||
break;
|
||
case PACKET_DISABLE:
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
enum {
|
||
PACKET_vCont = 0,
|
||
PACKET_X,
|
||
PACKET_qSymbol,
|
||
PACKET_P,
|
||
PACKET_p,
|
||
PACKET_Z0,
|
||
PACKET_Z1,
|
||
PACKET_Z2,
|
||
PACKET_Z3,
|
||
PACKET_Z4,
|
||
PACKET_vFile_open,
|
||
PACKET_vFile_pread,
|
||
PACKET_vFile_pwrite,
|
||
PACKET_vFile_close,
|
||
PACKET_vFile_unlink,
|
||
PACKET_qXfer_auxv,
|
||
PACKET_qXfer_features,
|
||
PACKET_qXfer_libraries,
|
||
PACKET_qXfer_memory_map,
|
||
PACKET_qXfer_spu_read,
|
||
PACKET_qXfer_spu_write,
|
||
PACKET_qXfer_osdata,
|
||
PACKET_qGetTLSAddr,
|
||
PACKET_qSupported,
|
||
PACKET_QPassSignals,
|
||
PACKET_qSearch_memory,
|
||
PACKET_vAttach,
|
||
PACKET_vRun,
|
||
PACKET_QStartNoAckMode,
|
||
PACKET_vKill,
|
||
PACKET_qXfer_siginfo_read,
|
||
PACKET_qXfer_siginfo_write,
|
||
PACKET_qAttached,
|
||
PACKET_ConditionalTracepoints,
|
||
PACKET_MAX
|
||
};
|
||
|
||
static struct packet_config remote_protocol_packets[PACKET_MAX];
|
||
|
||
static void
|
||
set_remote_protocol_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
struct packet_config *packet;
|
||
|
||
for (packet = remote_protocol_packets;
|
||
packet < &remote_protocol_packets[PACKET_MAX];
|
||
packet++)
|
||
{
|
||
if (&packet->detect == c->var)
|
||
{
|
||
update_packet_config (packet);
|
||
return;
|
||
}
|
||
}
|
||
internal_error (__FILE__, __LINE__, "Could not find config for %s",
|
||
c->name);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c,
|
||
const char *value)
|
||
{
|
||
struct packet_config *packet;
|
||
|
||
for (packet = remote_protocol_packets;
|
||
packet < &remote_protocol_packets[PACKET_MAX];
|
||
packet++)
|
||
{
|
||
if (&packet->detect == c->var)
|
||
{
|
||
show_packet_config_cmd (packet);
|
||
return;
|
||
}
|
||
}
|
||
internal_error (__FILE__, __LINE__, "Could not find config for %s",
|
||
c->name);
|
||
}
|
||
|
||
/* Should we try one of the 'Z' requests? */
|
||
|
||
enum Z_packet_type
|
||
{
|
||
Z_PACKET_SOFTWARE_BP,
|
||
Z_PACKET_HARDWARE_BP,
|
||
Z_PACKET_WRITE_WP,
|
||
Z_PACKET_READ_WP,
|
||
Z_PACKET_ACCESS_WP,
|
||
NR_Z_PACKET_TYPES
|
||
};
|
||
|
||
/* For compatibility with older distributions. Provide a ``set remote
|
||
Z-packet ...'' command that updates all the Z packet types. */
|
||
|
||
static enum auto_boolean remote_Z_packet_detect;
|
||
|
||
static void
|
||
set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
int i;
|
||
for (i = 0; i < NR_Z_PACKET_TYPES; i++)
|
||
{
|
||
remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
|
||
update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]);
|
||
}
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c,
|
||
const char *value)
|
||
{
|
||
int i;
|
||
for (i = 0; i < NR_Z_PACKET_TYPES; i++)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
|
||
}
|
||
}
|
||
|
||
/* Should we try the 'ThreadInfo' query packet?
|
||
|
||
This variable (NOT available to the user: auto-detect only!)
|
||
determines whether GDB will use the new, simpler "ThreadInfo"
|
||
query or the older, more complex syntax for thread queries.
|
||
This is an auto-detect variable (set to true at each connect,
|
||
and set to false when the target fails to recognize it). */
|
||
|
||
static int use_threadinfo_query;
|
||
static int use_threadextra_query;
|
||
|
||
/* Tokens for use by the asynchronous signal handlers for SIGINT. */
|
||
static struct async_signal_handler *sigint_remote_twice_token;
|
||
static struct async_signal_handler *sigint_remote_token;
|
||
|
||
|
||
/* Asynchronous signal handle registered as event loop source for
|
||
when we have pending events ready to be passed to the core. */
|
||
|
||
static struct async_event_handler *remote_async_inferior_event_token;
|
||
|
||
/* Asynchronous signal handle registered as event loop source for when
|
||
the remote sent us a %Stop notification. The registered callback
|
||
will do a vStopped sequence to pull the rest of the events out of
|
||
the remote side into our event queue. */
|
||
|
||
static struct async_event_handler *remote_async_get_pending_events_token;
|
||
|
||
|
||
static ptid_t magic_null_ptid;
|
||
static ptid_t not_sent_ptid;
|
||
static ptid_t any_thread_ptid;
|
||
|
||
/* These are the threads which we last sent to the remote system. The
|
||
TID member will be -1 for all or -2 for not sent yet. */
|
||
|
||
static ptid_t general_thread;
|
||
static ptid_t continue_thread;
|
||
|
||
/* Find out if the stub attached to PID (and hence GDB should offer to
|
||
detach instead of killing it when bailing out). */
|
||
|
||
static int
|
||
remote_query_attached (int pid)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (remote_protocol_packets[PACKET_qAttached].support == PACKET_DISABLE)
|
||
return 0;
|
||
|
||
if (remote_multi_process_p (rs))
|
||
sprintf (rs->buf, "qAttached:%x", pid);
|
||
else
|
||
sprintf (rs->buf, "qAttached");
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
switch (packet_ok (rs->buf,
|
||
&remote_protocol_packets[PACKET_qAttached]))
|
||
{
|
||
case PACKET_OK:
|
||
if (strcmp (rs->buf, "1") == 0)
|
||
return 1;
|
||
break;
|
||
case PACKET_ERROR:
|
||
warning (_("Remote failure reply: %s"), rs->buf);
|
||
break;
|
||
case PACKET_UNKNOWN:
|
||
break;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Add PID to GDB's inferior table. Since we can be connected to a
|
||
remote system before before knowing about any inferior, mark the
|
||
target with execution when we find the first inferior. If ATTACHED
|
||
is 1, then we had just attached to this inferior. If it is 0, then
|
||
we just created this inferior. If it is -1, then try querying the
|
||
remote stub to find out if it had attached to the inferior or
|
||
not. */
|
||
|
||
static struct inferior *
|
||
remote_add_inferior (int pid, int attached)
|
||
{
|
||
struct inferior *inf;
|
||
|
||
/* Check whether this process we're learning about is to be
|
||
considered attached, or if is to be considered to have been
|
||
spawned by the stub. */
|
||
if (attached == -1)
|
||
attached = remote_query_attached (pid);
|
||
|
||
inf = add_inferior (pid);
|
||
|
||
inf->attach_flag = attached;
|
||
|
||
return inf;
|
||
}
|
||
|
||
/* Add thread PTID to GDB's thread list. Tag it as executing/running
|
||
according to RUNNING. */
|
||
|
||
static void
|
||
remote_add_thread (ptid_t ptid, int running)
|
||
{
|
||
add_thread (ptid);
|
||
|
||
set_executing (ptid, running);
|
||
set_running (ptid, running);
|
||
}
|
||
|
||
/* Come here when we learn about a thread id from the remote target.
|
||
It may be the first time we hear about such thread, so take the
|
||
opportunity to add it to GDB's thread list. In case this is the
|
||
first time we're noticing its corresponding inferior, add it to
|
||
GDB's inferior list as well. */
|
||
|
||
static void
|
||
remote_notice_new_inferior (ptid_t currthread, int running)
|
||
{
|
||
/* If this is a new thread, add it to GDB's thread list.
|
||
If we leave it up to WFI to do this, bad things will happen. */
|
||
|
||
if (in_thread_list (currthread) && is_exited (currthread))
|
||
{
|
||
/* We're seeing an event on a thread id we knew had exited.
|
||
This has to be a new thread reusing the old id. Add it. */
|
||
remote_add_thread (currthread, running);
|
||
return;
|
||
}
|
||
|
||
if (!in_thread_list (currthread))
|
||
{
|
||
struct inferior *inf = NULL;
|
||
int pid = ptid_get_pid (currthread);
|
||
|
||
if (ptid_is_pid (inferior_ptid)
|
||
&& pid == ptid_get_pid (inferior_ptid))
|
||
{
|
||
/* inferior_ptid has no thread member yet. This can happen
|
||
with the vAttach -> remote_wait,"TAAthread:" path if the
|
||
stub doesn't support qC. This is the first stop reported
|
||
after an attach, so this is the main thread. Update the
|
||
ptid in the thread list. */
|
||
if (in_thread_list (pid_to_ptid (pid)))
|
||
thread_change_ptid (inferior_ptid, currthread);
|
||
else
|
||
{
|
||
remote_add_thread (currthread, running);
|
||
inferior_ptid = currthread;
|
||
}
|
||
return;
|
||
}
|
||
|
||
if (ptid_equal (magic_null_ptid, inferior_ptid))
|
||
{
|
||
/* inferior_ptid is not set yet. This can happen with the
|
||
vRun -> remote_wait,"TAAthread:" path if the stub
|
||
doesn't support qC. This is the first stop reported
|
||
after an attach, so this is the main thread. Update the
|
||
ptid in the thread list. */
|
||
thread_change_ptid (inferior_ptid, currthread);
|
||
return;
|
||
}
|
||
|
||
/* When connecting to a target remote, or to a target
|
||
extended-remote which already was debugging an inferior, we
|
||
may not know about it yet. Add it before adding its child
|
||
thread, so notifications are emitted in a sensible order. */
|
||
if (!in_inferior_list (ptid_get_pid (currthread)))
|
||
inf = remote_add_inferior (ptid_get_pid (currthread), -1);
|
||
|
||
/* This is really a new thread. Add it. */
|
||
remote_add_thread (currthread, running);
|
||
|
||
/* If we found a new inferior, let the common code do whatever
|
||
it needs to with it (e.g., read shared libraries, insert
|
||
breakpoints). */
|
||
if (inf != NULL)
|
||
notice_new_inferior (currthread, running, 0);
|
||
}
|
||
}
|
||
|
||
/* Call this function as a result of
|
||
1) A halt indication (T packet) containing a thread id
|
||
2) A direct query of currthread
|
||
3) Successful execution of set thread
|
||
*/
|
||
|
||
static void
|
||
record_currthread (ptid_t currthread)
|
||
{
|
||
general_thread = currthread;
|
||
|
||
if (ptid_equal (currthread, minus_one_ptid))
|
||
/* We're just invalidating the local thread mirror. */
|
||
return;
|
||
|
||
remote_notice_new_inferior (currthread, 0);
|
||
}
|
||
|
||
static char *last_pass_packet;
|
||
|
||
/* If 'QPassSignals' is supported, tell the remote stub what signals
|
||
it can simply pass through to the inferior without reporting. */
|
||
|
||
static void
|
||
remote_pass_signals (void)
|
||
{
|
||
if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
|
||
{
|
||
char *pass_packet, *p;
|
||
int numsigs = (int) TARGET_SIGNAL_LAST;
|
||
int count = 0, i;
|
||
|
||
gdb_assert (numsigs < 256);
|
||
for (i = 0; i < numsigs; i++)
|
||
{
|
||
if (signal_stop_state (i) == 0
|
||
&& signal_print_state (i) == 0
|
||
&& signal_pass_state (i) == 1)
|
||
count++;
|
||
}
|
||
pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
|
||
strcpy (pass_packet, "QPassSignals:");
|
||
p = pass_packet + strlen (pass_packet);
|
||
for (i = 0; i < numsigs; i++)
|
||
{
|
||
if (signal_stop_state (i) == 0
|
||
&& signal_print_state (i) == 0
|
||
&& signal_pass_state (i) == 1)
|
||
{
|
||
if (i >= 16)
|
||
*p++ = tohex (i >> 4);
|
||
*p++ = tohex (i & 15);
|
||
if (count)
|
||
*p++ = ';';
|
||
else
|
||
break;
|
||
count--;
|
||
}
|
||
}
|
||
*p = 0;
|
||
if (!last_pass_packet || strcmp (last_pass_packet, pass_packet))
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *buf = rs->buf;
|
||
|
||
putpkt (pass_packet);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]);
|
||
if (last_pass_packet)
|
||
xfree (last_pass_packet);
|
||
last_pass_packet = pass_packet;
|
||
}
|
||
else
|
||
xfree (pass_packet);
|
||
}
|
||
}
|
||
|
||
/* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
|
||
MINUS_ONE_PTID, set the thread to -1, so the stub returns the
|
||
thread. If GEN is set, set the general thread, if not, then set
|
||
the step/continue thread. */
|
||
static void
|
||
set_thread (struct ptid ptid, int gen)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
ptid_t state = gen ? general_thread : continue_thread;
|
||
char *buf = rs->buf;
|
||
char *endbuf = rs->buf + get_remote_packet_size ();
|
||
|
||
if (ptid_equal (state, ptid))
|
||
return;
|
||
|
||
*buf++ = 'H';
|
||
*buf++ = gen ? 'g' : 'c';
|
||
if (ptid_equal (ptid, magic_null_ptid))
|
||
xsnprintf (buf, endbuf - buf, "0");
|
||
else if (ptid_equal (ptid, any_thread_ptid))
|
||
xsnprintf (buf, endbuf - buf, "0");
|
||
else if (ptid_equal (ptid, minus_one_ptid))
|
||
xsnprintf (buf, endbuf - buf, "-1");
|
||
else
|
||
write_ptid (buf, endbuf, ptid);
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (gen)
|
||
general_thread = ptid;
|
||
else
|
||
continue_thread = ptid;
|
||
}
|
||
|
||
static void
|
||
set_general_thread (struct ptid ptid)
|
||
{
|
||
set_thread (ptid, 1);
|
||
}
|
||
|
||
static void
|
||
set_continue_thread (struct ptid ptid)
|
||
{
|
||
set_thread (ptid, 0);
|
||
}
|
||
|
||
/* Change the remote current process. Which thread within the process
|
||
ends up selected isn't important, as long as it is the same process
|
||
as what INFERIOR_PTID points to.
|
||
|
||
This comes from that fact that there is no explicit notion of
|
||
"selected process" in the protocol. The selected process for
|
||
general operations is the process the selected general thread
|
||
belongs to. */
|
||
|
||
static void
|
||
set_general_process (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
/* If the remote can't handle multiple processes, don't bother. */
|
||
if (!remote_multi_process_p (rs))
|
||
return;
|
||
|
||
/* We only need to change the remote current thread if it's pointing
|
||
at some other process. */
|
||
if (ptid_get_pid (general_thread) != ptid_get_pid (inferior_ptid))
|
||
set_general_thread (inferior_ptid);
|
||
}
|
||
|
||
|
||
/* Return nonzero if the thread PTID is still alive on the remote
|
||
system. */
|
||
|
||
static int
|
||
remote_thread_alive (struct target_ops *ops, ptid_t ptid)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p, *endp;
|
||
|
||
if (ptid_equal (ptid, magic_null_ptid))
|
||
/* The main thread is always alive. */
|
||
return 1;
|
||
|
||
if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0)
|
||
/* The main thread is always alive. This can happen after a
|
||
vAttach, if the remote side doesn't support
|
||
multi-threading. */
|
||
return 1;
|
||
|
||
p = rs->buf;
|
||
endp = rs->buf + get_remote_packet_size ();
|
||
|
||
*p++ = 'T';
|
||
write_ptid (p, endp, ptid);
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
|
||
}
|
||
|
||
/* About these extended threadlist and threadinfo packets. They are
|
||
variable length packets but, the fields within them are often fixed
|
||
length. They are redundent enough to send over UDP as is the
|
||
remote protocol in general. There is a matching unit test module
|
||
in libstub. */
|
||
|
||
#define OPAQUETHREADBYTES 8
|
||
|
||
/* a 64 bit opaque identifier */
|
||
typedef unsigned char threadref[OPAQUETHREADBYTES];
|
||
|
||
/* WARNING: This threadref data structure comes from the remote O.S.,
|
||
libstub protocol encoding, and remote.c. it is not particularly
|
||
changable. */
|
||
|
||
/* Right now, the internal structure is int. We want it to be bigger.
|
||
Plan to fix this.
|
||
*/
|
||
|
||
typedef int gdb_threadref; /* Internal GDB thread reference. */
|
||
|
||
/* gdb_ext_thread_info is an internal GDB data structure which is
|
||
equivalent to the reply of the remote threadinfo packet. */
|
||
|
||
struct gdb_ext_thread_info
|
||
{
|
||
threadref threadid; /* External form of thread reference. */
|
||
int active; /* Has state interesting to GDB?
|
||
regs, stack. */
|
||
char display[256]; /* Brief state display, name,
|
||
blocked/suspended. */
|
||
char shortname[32]; /* To be used to name threads. */
|
||
char more_display[256]; /* Long info, statistics, queue depth,
|
||
whatever. */
|
||
};
|
||
|
||
/* The volume of remote transfers can be limited by submitting
|
||
a mask containing bits specifying the desired information.
|
||
Use a union of these values as the 'selection' parameter to
|
||
get_thread_info. FIXME: Make these TAG names more thread specific.
|
||
*/
|
||
|
||
#define TAG_THREADID 1
|
||
#define TAG_EXISTS 2
|
||
#define TAG_DISPLAY 4
|
||
#define TAG_THREADNAME 8
|
||
#define TAG_MOREDISPLAY 16
|
||
|
||
#define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
|
||
|
||
char *unpack_varlen_hex (char *buff, ULONGEST *result);
|
||
|
||
static char *unpack_nibble (char *buf, int *val);
|
||
|
||
static char *pack_nibble (char *buf, int nibble);
|
||
|
||
static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
|
||
|
||
static char *unpack_byte (char *buf, int *value);
|
||
|
||
static char *pack_int (char *buf, int value);
|
||
|
||
static char *unpack_int (char *buf, int *value);
|
||
|
||
static char *unpack_string (char *src, char *dest, int length);
|
||
|
||
static char *pack_threadid (char *pkt, threadref *id);
|
||
|
||
static char *unpack_threadid (char *inbuf, threadref *id);
|
||
|
||
void int_to_threadref (threadref *id, int value);
|
||
|
||
static int threadref_to_int (threadref *ref);
|
||
|
||
static void copy_threadref (threadref *dest, threadref *src);
|
||
|
||
static int threadmatch (threadref *dest, threadref *src);
|
||
|
||
static char *pack_threadinfo_request (char *pkt, int mode,
|
||
threadref *id);
|
||
|
||
static int remote_unpack_thread_info_response (char *pkt,
|
||
threadref *expectedref,
|
||
struct gdb_ext_thread_info
|
||
*info);
|
||
|
||
|
||
static int remote_get_threadinfo (threadref *threadid,
|
||
int fieldset, /*TAG mask */
|
||
struct gdb_ext_thread_info *info);
|
||
|
||
static char *pack_threadlist_request (char *pkt, int startflag,
|
||
int threadcount,
|
||
threadref *nextthread);
|
||
|
||
static int parse_threadlist_response (char *pkt,
|
||
int result_limit,
|
||
threadref *original_echo,
|
||
threadref *resultlist,
|
||
int *doneflag);
|
||
|
||
static int remote_get_threadlist (int startflag,
|
||
threadref *nextthread,
|
||
int result_limit,
|
||
int *done,
|
||
int *result_count,
|
||
threadref *threadlist);
|
||
|
||
typedef int (*rmt_thread_action) (threadref *ref, void *context);
|
||
|
||
static int remote_threadlist_iterator (rmt_thread_action stepfunction,
|
||
void *context, int looplimit);
|
||
|
||
static int remote_newthread_step (threadref *ref, void *context);
|
||
|
||
|
||
/* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
|
||
buffer we're allowed to write to. Returns
|
||
BUF+CHARACTERS_WRITTEN. */
|
||
|
||
static char *
|
||
write_ptid (char *buf, const char *endbuf, ptid_t ptid)
|
||
{
|
||
int pid, tid;
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (remote_multi_process_p (rs))
|
||
{
|
||
pid = ptid_get_pid (ptid);
|
||
if (pid < 0)
|
||
buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
|
||
else
|
||
buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
|
||
}
|
||
tid = ptid_get_tid (ptid);
|
||
if (tid < 0)
|
||
buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
|
||
else
|
||
buf += xsnprintf (buf, endbuf - buf, "%x", tid);
|
||
|
||
return buf;
|
||
}
|
||
|
||
/* Extract a PTID from BUF. If non-null, OBUF is set to the to one
|
||
passed the last parsed char. Returns null_ptid on error. */
|
||
|
||
static ptid_t
|
||
read_ptid (char *buf, char **obuf)
|
||
{
|
||
char *p = buf;
|
||
char *pp;
|
||
ULONGEST pid = 0, tid = 0;
|
||
|
||
if (*p == 'p')
|
||
{
|
||
/* Multi-process ptid. */
|
||
pp = unpack_varlen_hex (p + 1, &pid);
|
||
if (*pp != '.')
|
||
error (_("invalid remote ptid: %s\n"), p);
|
||
|
||
p = pp;
|
||
pp = unpack_varlen_hex (p + 1, &tid);
|
||
if (obuf)
|
||
*obuf = pp;
|
||
return ptid_build (pid, 0, tid);
|
||
}
|
||
|
||
/* No multi-process. Just a tid. */
|
||
pp = unpack_varlen_hex (p, &tid);
|
||
|
||
/* Since the stub is not sending a process id, then default to
|
||
what's in inferior_ptid, unless it's null at this point. If so,
|
||
then since there's no way to know the pid of the reported
|
||
threads, use the magic number. */
|
||
if (ptid_equal (inferior_ptid, null_ptid))
|
||
pid = ptid_get_pid (magic_null_ptid);
|
||
else
|
||
pid = ptid_get_pid (inferior_ptid);
|
||
|
||
if (obuf)
|
||
*obuf = pp;
|
||
return ptid_build (pid, 0, tid);
|
||
}
|
||
|
||
/* Encode 64 bits in 16 chars of hex. */
|
||
|
||
static const char hexchars[] = "0123456789abcdef";
|
||
|
||
static int
|
||
ishex (int ch, int *val)
|
||
{
|
||
if ((ch >= 'a') && (ch <= 'f'))
|
||
{
|
||
*val = ch - 'a' + 10;
|
||
return 1;
|
||
}
|
||
if ((ch >= 'A') && (ch <= 'F'))
|
||
{
|
||
*val = ch - 'A' + 10;
|
||
return 1;
|
||
}
|
||
if ((ch >= '0') && (ch <= '9'))
|
||
{
|
||
*val = ch - '0';
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
stubhex (int ch)
|
||
{
|
||
if (ch >= 'a' && ch <= 'f')
|
||
return ch - 'a' + 10;
|
||
if (ch >= '0' && ch <= '9')
|
||
return ch - '0';
|
||
if (ch >= 'A' && ch <= 'F')
|
||
return ch - 'A' + 10;
|
||
return -1;
|
||
}
|
||
|
||
static int
|
||
stub_unpack_int (char *buff, int fieldlength)
|
||
{
|
||
int nibble;
|
||
int retval = 0;
|
||
|
||
while (fieldlength)
|
||
{
|
||
nibble = stubhex (*buff++);
|
||
retval |= nibble;
|
||
fieldlength--;
|
||
if (fieldlength)
|
||
retval = retval << 4;
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
char *
|
||
unpack_varlen_hex (char *buff, /* packet to parse */
|
||
ULONGEST *result)
|
||
{
|
||
int nibble;
|
||
ULONGEST retval = 0;
|
||
|
||
while (ishex (*buff, &nibble))
|
||
{
|
||
buff++;
|
||
retval = retval << 4;
|
||
retval |= nibble & 0x0f;
|
||
}
|
||
*result = retval;
|
||
return buff;
|
||
}
|
||
|
||
static char *
|
||
unpack_nibble (char *buf, int *val)
|
||
{
|
||
*val = fromhex (*buf++);
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
pack_nibble (char *buf, int nibble)
|
||
{
|
||
*buf++ = hexchars[(nibble & 0x0f)];
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
pack_hex_byte (char *pkt, int byte)
|
||
{
|
||
*pkt++ = hexchars[(byte >> 4) & 0xf];
|
||
*pkt++ = hexchars[(byte & 0xf)];
|
||
return pkt;
|
||
}
|
||
|
||
static char *
|
||
unpack_byte (char *buf, int *value)
|
||
{
|
||
*value = stub_unpack_int (buf, 2);
|
||
return buf + 2;
|
||
}
|
||
|
||
static char *
|
||
pack_int (char *buf, int value)
|
||
{
|
||
buf = pack_hex_byte (buf, (value >> 24) & 0xff);
|
||
buf = pack_hex_byte (buf, (value >> 16) & 0xff);
|
||
buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
|
||
buf = pack_hex_byte (buf, (value & 0xff));
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
unpack_int (char *buf, int *value)
|
||
{
|
||
*value = stub_unpack_int (buf, 8);
|
||
return buf + 8;
|
||
}
|
||
|
||
#if 0 /* Currently unused, uncomment when needed. */
|
||
static char *pack_string (char *pkt, char *string);
|
||
|
||
static char *
|
||
pack_string (char *pkt, char *string)
|
||
{
|
||
char ch;
|
||
int len;
|
||
|
||
len = strlen (string);
|
||
if (len > 200)
|
||
len = 200; /* Bigger than most GDB packets, junk??? */
|
||
pkt = pack_hex_byte (pkt, len);
|
||
while (len-- > 0)
|
||
{
|
||
ch = *string++;
|
||
if ((ch == '\0') || (ch == '#'))
|
||
ch = '*'; /* Protect encapsulation. */
|
||
*pkt++ = ch;
|
||
}
|
||
return pkt;
|
||
}
|
||
#endif /* 0 (unused) */
|
||
|
||
static char *
|
||
unpack_string (char *src, char *dest, int length)
|
||
{
|
||
while (length--)
|
||
*dest++ = *src++;
|
||
*dest = '\0';
|
||
return src;
|
||
}
|
||
|
||
static char *
|
||
pack_threadid (char *pkt, threadref *id)
|
||
{
|
||
char *limit;
|
||
unsigned char *altid;
|
||
|
||
altid = (unsigned char *) id;
|
||
limit = pkt + BUF_THREAD_ID_SIZE;
|
||
while (pkt < limit)
|
||
pkt = pack_hex_byte (pkt, *altid++);
|
||
return pkt;
|
||
}
|
||
|
||
|
||
static char *
|
||
unpack_threadid (char *inbuf, threadref *id)
|
||
{
|
||
char *altref;
|
||
char *limit = inbuf + BUF_THREAD_ID_SIZE;
|
||
int x, y;
|
||
|
||
altref = (char *) id;
|
||
|
||
while (inbuf < limit)
|
||
{
|
||
x = stubhex (*inbuf++);
|
||
y = stubhex (*inbuf++);
|
||
*altref++ = (x << 4) | y;
|
||
}
|
||
return inbuf;
|
||
}
|
||
|
||
/* Externally, threadrefs are 64 bits but internally, they are still
|
||
ints. This is due to a mismatch of specifications. We would like
|
||
to use 64bit thread references internally. This is an adapter
|
||
function. */
|
||
|
||
void
|
||
int_to_threadref (threadref *id, int value)
|
||
{
|
||
unsigned char *scan;
|
||
|
||
scan = (unsigned char *) id;
|
||
{
|
||
int i = 4;
|
||
while (i--)
|
||
*scan++ = 0;
|
||
}
|
||
*scan++ = (value >> 24) & 0xff;
|
||
*scan++ = (value >> 16) & 0xff;
|
||
*scan++ = (value >> 8) & 0xff;
|
||
*scan++ = (value & 0xff);
|
||
}
|
||
|
||
static int
|
||
threadref_to_int (threadref *ref)
|
||
{
|
||
int i, value = 0;
|
||
unsigned char *scan;
|
||
|
||
scan = *ref;
|
||
scan += 4;
|
||
i = 4;
|
||
while (i-- > 0)
|
||
value = (value << 8) | ((*scan++) & 0xff);
|
||
return value;
|
||
}
|
||
|
||
static void
|
||
copy_threadref (threadref *dest, threadref *src)
|
||
{
|
||
int i;
|
||
unsigned char *csrc, *cdest;
|
||
|
||
csrc = (unsigned char *) src;
|
||
cdest = (unsigned char *) dest;
|
||
i = 8;
|
||
while (i--)
|
||
*cdest++ = *csrc++;
|
||
}
|
||
|
||
static int
|
||
threadmatch (threadref *dest, threadref *src)
|
||
{
|
||
/* Things are broken right now, so just assume we got a match. */
|
||
#if 0
|
||
unsigned char *srcp, *destp;
|
||
int i, result;
|
||
srcp = (char *) src;
|
||
destp = (char *) dest;
|
||
|
||
result = 1;
|
||
while (i-- > 0)
|
||
result &= (*srcp++ == *destp++) ? 1 : 0;
|
||
return result;
|
||
#endif
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
threadid:1, # always request threadid
|
||
context_exists:2,
|
||
display:4,
|
||
unique_name:8,
|
||
more_display:16
|
||
*/
|
||
|
||
/* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
|
||
|
||
static char *
|
||
pack_threadinfo_request (char *pkt, int mode, threadref *id)
|
||
{
|
||
*pkt++ = 'q'; /* Info Query */
|
||
*pkt++ = 'P'; /* process or thread info */
|
||
pkt = pack_int (pkt, mode); /* mode */
|
||
pkt = pack_threadid (pkt, id); /* threadid */
|
||
*pkt = '\0'; /* terminate */
|
||
return pkt;
|
||
}
|
||
|
||
/* These values tag the fields in a thread info response packet. */
|
||
/* Tagging the fields allows us to request specific fields and to
|
||
add more fields as time goes by. */
|
||
|
||
#define TAG_THREADID 1 /* Echo the thread identifier. */
|
||
#define TAG_EXISTS 2 /* Is this process defined enough to
|
||
fetch registers and its stack? */
|
||
#define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
|
||
#define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
|
||
#define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
|
||
the process. */
|
||
|
||
static int
|
||
remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
|
||
struct gdb_ext_thread_info *info)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int mask, length;
|
||
int tag;
|
||
threadref ref;
|
||
char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
|
||
int retval = 1;
|
||
|
||
/* info->threadid = 0; FIXME: implement zero_threadref. */
|
||
info->active = 0;
|
||
info->display[0] = '\0';
|
||
info->shortname[0] = '\0';
|
||
info->more_display[0] = '\0';
|
||
|
||
/* Assume the characters indicating the packet type have been
|
||
stripped. */
|
||
pkt = unpack_int (pkt, &mask); /* arg mask */
|
||
pkt = unpack_threadid (pkt, &ref);
|
||
|
||
if (mask == 0)
|
||
warning (_("Incomplete response to threadinfo request."));
|
||
if (!threadmatch (&ref, expectedref))
|
||
{ /* This is an answer to a different request. */
|
||
warning (_("ERROR RMT Thread info mismatch."));
|
||
return 0;
|
||
}
|
||
copy_threadref (&info->threadid, &ref);
|
||
|
||
/* Loop on tagged fields , try to bail if somthing goes wrong. */
|
||
|
||
/* Packets are terminated with nulls. */
|
||
while ((pkt < limit) && mask && *pkt)
|
||
{
|
||
pkt = unpack_int (pkt, &tag); /* tag */
|
||
pkt = unpack_byte (pkt, &length); /* length */
|
||
if (!(tag & mask)) /* Tags out of synch with mask. */
|
||
{
|
||
warning (_("ERROR RMT: threadinfo tag mismatch."));
|
||
retval = 0;
|
||
break;
|
||
}
|
||
if (tag == TAG_THREADID)
|
||
{
|
||
if (length != 16)
|
||
{
|
||
warning (_("ERROR RMT: length of threadid is not 16."));
|
||
retval = 0;
|
||
break;
|
||
}
|
||
pkt = unpack_threadid (pkt, &ref);
|
||
mask = mask & ~TAG_THREADID;
|
||
continue;
|
||
}
|
||
if (tag == TAG_EXISTS)
|
||
{
|
||
info->active = stub_unpack_int (pkt, length);
|
||
pkt += length;
|
||
mask = mask & ~(TAG_EXISTS);
|
||
if (length > 8)
|
||
{
|
||
warning (_("ERROR RMT: 'exists' length too long."));
|
||
retval = 0;
|
||
break;
|
||
}
|
||
continue;
|
||
}
|
||
if (tag == TAG_THREADNAME)
|
||
{
|
||
pkt = unpack_string (pkt, &info->shortname[0], length);
|
||
mask = mask & ~TAG_THREADNAME;
|
||
continue;
|
||
}
|
||
if (tag == TAG_DISPLAY)
|
||
{
|
||
pkt = unpack_string (pkt, &info->display[0], length);
|
||
mask = mask & ~TAG_DISPLAY;
|
||
continue;
|
||
}
|
||
if (tag == TAG_MOREDISPLAY)
|
||
{
|
||
pkt = unpack_string (pkt, &info->more_display[0], length);
|
||
mask = mask & ~TAG_MOREDISPLAY;
|
||
continue;
|
||
}
|
||
warning (_("ERROR RMT: unknown thread info tag."));
|
||
break; /* Not a tag we know about. */
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
static int
|
||
remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
|
||
struct gdb_ext_thread_info *info)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int result;
|
||
|
||
pack_threadinfo_request (rs->buf, fieldset, threadid);
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (rs->buf[0] == '\0')
|
||
return 0;
|
||
|
||
result = remote_unpack_thread_info_response (rs->buf + 2,
|
||
threadid, info);
|
||
return result;
|
||
}
|
||
|
||
/* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
|
||
|
||
static char *
|
||
pack_threadlist_request (char *pkt, int startflag, int threadcount,
|
||
threadref *nextthread)
|
||
{
|
||
*pkt++ = 'q'; /* info query packet */
|
||
*pkt++ = 'L'; /* Process LIST or threadLIST request */
|
||
pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
|
||
pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
|
||
pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
|
||
*pkt = '\0';
|
||
return pkt;
|
||
}
|
||
|
||
/* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
|
||
|
||
static int
|
||
parse_threadlist_response (char *pkt, int result_limit,
|
||
threadref *original_echo, threadref *resultlist,
|
||
int *doneflag)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *limit;
|
||
int count, resultcount, done;
|
||
|
||
resultcount = 0;
|
||
/* Assume the 'q' and 'M chars have been stripped. */
|
||
limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
|
||
/* done parse past here */
|
||
pkt = unpack_byte (pkt, &count); /* count field */
|
||
pkt = unpack_nibble (pkt, &done);
|
||
/* The first threadid is the argument threadid. */
|
||
pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
|
||
while ((count-- > 0) && (pkt < limit))
|
||
{
|
||
pkt = unpack_threadid (pkt, resultlist++);
|
||
if (resultcount++ >= result_limit)
|
||
break;
|
||
}
|
||
if (doneflag)
|
||
*doneflag = done;
|
||
return resultcount;
|
||
}
|
||
|
||
static int
|
||
remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
|
||
int *done, int *result_count, threadref *threadlist)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
static threadref echo_nextthread;
|
||
int result = 1;
|
||
|
||
/* Trancate result limit to be smaller than the packet size. */
|
||
if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ())
|
||
result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
|
||
|
||
pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (*rs->buf == '\0')
|
||
*result_count = 0;
|
||
else
|
||
*result_count =
|
||
parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
|
||
threadlist, done);
|
||
|
||
if (!threadmatch (&echo_nextthread, nextthread))
|
||
{
|
||
/* FIXME: This is a good reason to drop the packet. */
|
||
/* Possably, there is a duplicate response. */
|
||
/* Possabilities :
|
||
retransmit immediatly - race conditions
|
||
retransmit after timeout - yes
|
||
exit
|
||
wait for packet, then exit
|
||
*/
|
||
warning (_("HMM: threadlist did not echo arg thread, dropping it."));
|
||
return 0; /* I choose simply exiting. */
|
||
}
|
||
if (*result_count <= 0)
|
||
{
|
||
if (*done != 1)
|
||
{
|
||
warning (_("RMT ERROR : failed to get remote thread list."));
|
||
result = 0;
|
||
}
|
||
return result; /* break; */
|
||
}
|
||
if (*result_count > result_limit)
|
||
{
|
||
*result_count = 0;
|
||
warning (_("RMT ERROR: threadlist response longer than requested."));
|
||
return 0;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/* This is the interface between remote and threads, remotes upper
|
||
interface. */
|
||
|
||
/* remote_find_new_threads retrieves the thread list and for each
|
||
thread in the list, looks up the thread in GDB's internal list,
|
||
adding the thread if it does not already exist. This involves
|
||
getting partial thread lists from the remote target so, polling the
|
||
quit_flag is required. */
|
||
|
||
|
||
/* About this many threadisds fit in a packet. */
|
||
|
||
#define MAXTHREADLISTRESULTS 32
|
||
|
||
static int
|
||
remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
|
||
int looplimit)
|
||
{
|
||
int done, i, result_count;
|
||
int startflag = 1;
|
||
int result = 1;
|
||
int loopcount = 0;
|
||
static threadref nextthread;
|
||
static threadref resultthreadlist[MAXTHREADLISTRESULTS];
|
||
|
||
done = 0;
|
||
while (!done)
|
||
{
|
||
if (loopcount++ > looplimit)
|
||
{
|
||
result = 0;
|
||
warning (_("Remote fetch threadlist -infinite loop-."));
|
||
break;
|
||
}
|
||
if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
|
||
&done, &result_count, resultthreadlist))
|
||
{
|
||
result = 0;
|
||
break;
|
||
}
|
||
/* Clear for later iterations. */
|
||
startflag = 0;
|
||
/* Setup to resume next batch of thread references, set nextthread. */
|
||
if (result_count >= 1)
|
||
copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
|
||
i = 0;
|
||
while (result_count--)
|
||
if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
|
||
break;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
remote_newthread_step (threadref *ref, void *context)
|
||
{
|
||
int pid = ptid_get_pid (inferior_ptid);
|
||
ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref));
|
||
|
||
if (!in_thread_list (ptid))
|
||
add_thread (ptid);
|
||
return 1; /* continue iterator */
|
||
}
|
||
|
||
#define CRAZY_MAX_THREADS 1000
|
||
|
||
static ptid_t
|
||
remote_current_thread (ptid_t oldpid)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
putpkt ("qC");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
|
||
return read_ptid (&rs->buf[2], NULL);
|
||
else
|
||
return oldpid;
|
||
}
|
||
|
||
/* Find new threads for info threads command.
|
||
* Original version, using John Metzler's thread protocol.
|
||
*/
|
||
|
||
static void
|
||
remote_find_new_threads (void)
|
||
{
|
||
remote_threadlist_iterator (remote_newthread_step, 0,
|
||
CRAZY_MAX_THREADS);
|
||
}
|
||
|
||
/*
|
||
* Find all threads for info threads command.
|
||
* Uses new thread protocol contributed by Cisco.
|
||
* Falls back and attempts to use the older method (above)
|
||
* if the target doesn't respond to the new method.
|
||
*/
|
||
|
||
static void
|
||
remote_threads_info (struct target_ops *ops)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *bufp;
|
||
ptid_t new_thread;
|
||
|
||
if (remote_desc == 0) /* paranoia */
|
||
error (_("Command can only be used when connected to the remote target."));
|
||
|
||
if (use_threadinfo_query)
|
||
{
|
||
putpkt ("qfThreadInfo");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
bufp = rs->buf;
|
||
if (bufp[0] != '\0') /* q packet recognized */
|
||
{
|
||
while (*bufp++ == 'm') /* reply contains one or more TID */
|
||
{
|
||
do
|
||
{
|
||
new_thread = read_ptid (bufp, &bufp);
|
||
if (!ptid_equal (new_thread, null_ptid))
|
||
{
|
||
/* In non-stop mode, we assume new found threads
|
||
are running until proven otherwise with a
|
||
stop reply. In all-stop, we can only get
|
||
here if all threads are stopped. */
|
||
int running = non_stop ? 1 : 0;
|
||
|
||
remote_notice_new_inferior (new_thread, running);
|
||
}
|
||
}
|
||
while (*bufp++ == ','); /* comma-separated list */
|
||
putpkt ("qsThreadInfo");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
bufp = rs->buf;
|
||
}
|
||
return; /* done */
|
||
}
|
||
}
|
||
|
||
/* Only qfThreadInfo is supported in non-stop mode. */
|
||
if (non_stop)
|
||
return;
|
||
|
||
/* Else fall back to old method based on jmetzler protocol. */
|
||
use_threadinfo_query = 0;
|
||
remote_find_new_threads ();
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Collect a descriptive string about the given thread.
|
||
* The target may say anything it wants to about the thread
|
||
* (typically info about its blocked / runnable state, name, etc.).
|
||
* This string will appear in the info threads display.
|
||
*
|
||
* Optional: targets are not required to implement this function.
|
||
*/
|
||
|
||
static char *
|
||
remote_threads_extra_info (struct thread_info *tp)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int result;
|
||
int set;
|
||
threadref id;
|
||
struct gdb_ext_thread_info threadinfo;
|
||
static char display_buf[100]; /* arbitrary... */
|
||
int n = 0; /* position in display_buf */
|
||
|
||
if (remote_desc == 0) /* paranoia */
|
||
internal_error (__FILE__, __LINE__,
|
||
_("remote_threads_extra_info"));
|
||
|
||
if (ptid_equal (tp->ptid, magic_null_ptid)
|
||
|| (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
|
||
/* This is the main thread which was added by GDB. The remote
|
||
server doesn't know about it. */
|
||
return NULL;
|
||
|
||
if (use_threadextra_query)
|
||
{
|
||
char *b = rs->buf;
|
||
char *endb = rs->buf + get_remote_packet_size ();
|
||
|
||
xsnprintf (b, endb - b, "qThreadExtraInfo,");
|
||
b += strlen (b);
|
||
write_ptid (b, endb, tp->ptid);
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (rs->buf[0] != 0)
|
||
{
|
||
n = min (strlen (rs->buf) / 2, sizeof (display_buf));
|
||
result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
|
||
display_buf [result] = '\0';
|
||
return display_buf;
|
||
}
|
||
}
|
||
|
||
/* If the above query fails, fall back to the old method. */
|
||
use_threadextra_query = 0;
|
||
set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
|
||
| TAG_MOREDISPLAY | TAG_DISPLAY;
|
||
int_to_threadref (&id, ptid_get_tid (tp->ptid));
|
||
if (remote_get_threadinfo (&id, set, &threadinfo))
|
||
if (threadinfo.active)
|
||
{
|
||
if (*threadinfo.shortname)
|
||
n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
|
||
" Name: %s,", threadinfo.shortname);
|
||
if (*threadinfo.display)
|
||
n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
|
||
" State: %s,", threadinfo.display);
|
||
if (*threadinfo.more_display)
|
||
n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
|
||
" Priority: %s", threadinfo.more_display);
|
||
|
||
if (n > 0)
|
||
{
|
||
/* For purely cosmetic reasons, clear up trailing commas. */
|
||
if (',' == display_buf[n-1])
|
||
display_buf[n-1] = ' ';
|
||
return display_buf;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Restart the remote side; this is an extended protocol operation. */
|
||
|
||
static void
|
||
extended_remote_restart (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
/* Send the restart command; for reasons I don't understand the
|
||
remote side really expects a number after the "R". */
|
||
xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
|
||
putpkt (rs->buf);
|
||
|
||
remote_fileio_reset ();
|
||
}
|
||
|
||
/* Clean up connection to a remote debugger. */
|
||
|
||
static void
|
||
remote_close (int quitting)
|
||
{
|
||
if (remote_desc == NULL)
|
||
return; /* already closed */
|
||
|
||
/* Make sure we leave stdin registered in the event loop, and we
|
||
don't leave the async SIGINT signal handler installed. */
|
||
remote_terminal_ours ();
|
||
|
||
serial_close (remote_desc);
|
||
remote_desc = NULL;
|
||
|
||
/* We don't have a connection to the remote stub anymore. Get rid
|
||
of all the inferiors and their threads we were controlling. */
|
||
discard_all_inferiors ();
|
||
|
||
/* We're no longer interested in any of these events. */
|
||
discard_pending_stop_replies (-1);
|
||
|
||
if (remote_async_inferior_event_token)
|
||
delete_async_event_handler (&remote_async_inferior_event_token);
|
||
if (remote_async_get_pending_events_token)
|
||
delete_async_event_handler (&remote_async_get_pending_events_token);
|
||
}
|
||
|
||
/* Query the remote side for the text, data and bss offsets. */
|
||
|
||
static void
|
||
get_offsets (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *buf;
|
||
char *ptr;
|
||
int lose, num_segments = 0, do_sections, do_segments;
|
||
CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
|
||
struct section_offsets *offs;
|
||
struct symfile_segment_data *data;
|
||
|
||
if (symfile_objfile == NULL)
|
||
return;
|
||
|
||
putpkt ("qOffsets");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
buf = rs->buf;
|
||
|
||
if (buf[0] == '\000')
|
||
return; /* Return silently. Stub doesn't support
|
||
this command. */
|
||
if (buf[0] == 'E')
|
||
{
|
||
warning (_("Remote failure reply: %s"), buf);
|
||
return;
|
||
}
|
||
|
||
/* Pick up each field in turn. This used to be done with scanf, but
|
||
scanf will make trouble if CORE_ADDR size doesn't match
|
||
conversion directives correctly. The following code will work
|
||
with any size of CORE_ADDR. */
|
||
text_addr = data_addr = bss_addr = 0;
|
||
ptr = buf;
|
||
lose = 0;
|
||
|
||
if (strncmp (ptr, "Text=", 5) == 0)
|
||
{
|
||
ptr += 5;
|
||
/* Don't use strtol, could lose on big values. */
|
||
while (*ptr && *ptr != ';')
|
||
text_addr = (text_addr << 4) + fromhex (*ptr++);
|
||
|
||
if (strncmp (ptr, ";Data=", 6) == 0)
|
||
{
|
||
ptr += 6;
|
||
while (*ptr && *ptr != ';')
|
||
data_addr = (data_addr << 4) + fromhex (*ptr++);
|
||
}
|
||
else
|
||
lose = 1;
|
||
|
||
if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
|
||
{
|
||
ptr += 5;
|
||
while (*ptr && *ptr != ';')
|
||
bss_addr = (bss_addr << 4) + fromhex (*ptr++);
|
||
|
||
if (bss_addr != data_addr)
|
||
warning (_("Target reported unsupported offsets: %s"), buf);
|
||
}
|
||
else
|
||
lose = 1;
|
||
}
|
||
else if (strncmp (ptr, "TextSeg=", 8) == 0)
|
||
{
|
||
ptr += 8;
|
||
/* Don't use strtol, could lose on big values. */
|
||
while (*ptr && *ptr != ';')
|
||
text_addr = (text_addr << 4) + fromhex (*ptr++);
|
||
num_segments = 1;
|
||
|
||
if (strncmp (ptr, ";DataSeg=", 9) == 0)
|
||
{
|
||
ptr += 9;
|
||
while (*ptr && *ptr != ';')
|
||
data_addr = (data_addr << 4) + fromhex (*ptr++);
|
||
num_segments++;
|
||
}
|
||
}
|
||
else
|
||
lose = 1;
|
||
|
||
if (lose)
|
||
error (_("Malformed response to offset query, %s"), buf);
|
||
else if (*ptr != '\0')
|
||
warning (_("Target reported unsupported offsets: %s"), buf);
|
||
|
||
offs = ((struct section_offsets *)
|
||
alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
|
||
memcpy (offs, symfile_objfile->section_offsets,
|
||
SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
|
||
|
||
data = get_symfile_segment_data (symfile_objfile->obfd);
|
||
do_segments = (data != NULL);
|
||
do_sections = num_segments == 0;
|
||
|
||
if (num_segments > 0)
|
||
{
|
||
segments[0] = text_addr;
|
||
segments[1] = data_addr;
|
||
}
|
||
/* If we have two segments, we can still try to relocate everything
|
||
by assuming that the .text and .data offsets apply to the whole
|
||
text and data segments. Convert the offsets given in the packet
|
||
to base addresses for symfile_map_offsets_to_segments. */
|
||
else if (data && data->num_segments == 2)
|
||
{
|
||
segments[0] = data->segment_bases[0] + text_addr;
|
||
segments[1] = data->segment_bases[1] + data_addr;
|
||
num_segments = 2;
|
||
}
|
||
/* If the object file has only one segment, assume that it is text
|
||
rather than data; main programs with no writable data are rare,
|
||
but programs with no code are useless. Of course the code might
|
||
have ended up in the data segment... to detect that we would need
|
||
the permissions here. */
|
||
else if (data && data->num_segments == 1)
|
||
{
|
||
segments[0] = data->segment_bases[0] + text_addr;
|
||
num_segments = 1;
|
||
}
|
||
/* There's no way to relocate by segment. */
|
||
else
|
||
do_segments = 0;
|
||
|
||
if (do_segments)
|
||
{
|
||
int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
|
||
offs, num_segments, segments);
|
||
|
||
if (ret == 0 && !do_sections)
|
||
error (_("Can not handle qOffsets TextSeg response with this symbol file"));
|
||
|
||
if (ret > 0)
|
||
do_sections = 0;
|
||
}
|
||
|
||
if (data)
|
||
free_symfile_segment_data (data);
|
||
|
||
if (do_sections)
|
||
{
|
||
offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
|
||
|
||
/* This is a temporary kludge to force data and bss to use the same offsets
|
||
because that's what nlmconv does now. The real solution requires changes
|
||
to the stub and remote.c that I don't have time to do right now. */
|
||
|
||
offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
|
||
offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
|
||
}
|
||
|
||
objfile_relocate (symfile_objfile, offs);
|
||
}
|
||
|
||
/* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
|
||
threads we know are stopped already. This is used during the
|
||
initial remote connection in non-stop mode --- threads that are
|
||
reported as already being stopped are left stopped. */
|
||
|
||
static int
|
||
set_stop_requested_callback (struct thread_info *thread, void *data)
|
||
{
|
||
/* If we have a stop reply for this thread, it must be stopped. */
|
||
if (peek_stop_reply (thread->ptid))
|
||
set_stop_requested (thread->ptid, 1);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Stub for catch_exception. */
|
||
|
||
struct start_remote_args
|
||
{
|
||
int from_tty;
|
||
|
||
/* The current target. */
|
||
struct target_ops *target;
|
||
|
||
/* Non-zero if this is an extended-remote target. */
|
||
int extended_p;
|
||
};
|
||
|
||
static void
|
||
remote_start_remote (struct ui_out *uiout, void *opaque)
|
||
{
|
||
struct start_remote_args *args = opaque;
|
||
struct remote_state *rs = get_remote_state ();
|
||
struct packet_config *noack_config;
|
||
char *wait_status = NULL;
|
||
|
||
immediate_quit++; /* Allow user to interrupt it. */
|
||
|
||
/* Ack any packet which the remote side has already sent. */
|
||
serial_write (remote_desc, "+", 1);
|
||
|
||
/* The first packet we send to the target is the optional "supported
|
||
packets" request. If the target can answer this, it will tell us
|
||
which later probes to skip. */
|
||
remote_query_supported ();
|
||
|
||
/* Next, we possibly activate noack mode.
|
||
|
||
If the QStartNoAckMode packet configuration is set to AUTO,
|
||
enable noack mode if the stub reported a wish for it with
|
||
qSupported.
|
||
|
||
If set to TRUE, then enable noack mode even if the stub didn't
|
||
report it in qSupported. If the stub doesn't reply OK, the
|
||
session ends with an error.
|
||
|
||
If FALSE, then don't activate noack mode, regardless of what the
|
||
stub claimed should be the default with qSupported. */
|
||
|
||
noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
|
||
|
||
if (noack_config->detect == AUTO_BOOLEAN_TRUE
|
||
|| (noack_config->detect == AUTO_BOOLEAN_AUTO
|
||
&& noack_config->support == PACKET_ENABLE))
|
||
{
|
||
putpkt ("QStartNoAckMode");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (packet_ok (rs->buf, noack_config) == PACKET_OK)
|
||
rs->noack_mode = 1;
|
||
}
|
||
|
||
if (args->extended_p)
|
||
{
|
||
/* Tell the remote that we are using the extended protocol. */
|
||
putpkt ("!");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
}
|
||
|
||
/* Next, if the target can specify a description, read it. We do
|
||
this before anything involving memory or registers. */
|
||
target_find_description ();
|
||
|
||
/* On OSs where the list of libraries is global to all
|
||
processes, we fetch them early. */
|
||
if (gdbarch_has_global_solist (target_gdbarch))
|
||
solib_add (NULL, args->from_tty, args->target, auto_solib_add);
|
||
|
||
if (non_stop)
|
||
{
|
||
if (!rs->non_stop_aware)
|
||
error (_("Non-stop mode requested, but remote does not support non-stop"));
|
||
|
||
putpkt ("QNonStop:1");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (strcmp (rs->buf, "OK") != 0)
|
||
error ("Remote refused setting non-stop mode with: %s", rs->buf);
|
||
|
||
/* Find about threads and processes the stub is already
|
||
controlling. We default to adding them in the running state.
|
||
The '?' query below will then tell us about which threads are
|
||
stopped. */
|
||
remote_threads_info (args->target);
|
||
}
|
||
else if (rs->non_stop_aware)
|
||
{
|
||
/* Don't assume that the stub can operate in all-stop mode.
|
||
Request it explicitely. */
|
||
putpkt ("QNonStop:0");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (strcmp (rs->buf, "OK") != 0)
|
||
error ("Remote refused setting all-stop mode with: %s", rs->buf);
|
||
}
|
||
|
||
/* Check whether the target is running now. */
|
||
putpkt ("?");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (!non_stop)
|
||
{
|
||
if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
|
||
{
|
||
if (!args->extended_p)
|
||
error (_("The target is not running (try extended-remote?)"));
|
||
|
||
/* We're connected, but not running. Drop out before we
|
||
call start_remote. */
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
/* Save the reply for later. */
|
||
wait_status = alloca (strlen (rs->buf) + 1);
|
||
strcpy (wait_status, rs->buf);
|
||
}
|
||
|
||
/* Let the stub know that we want it to return the thread. */
|
||
set_continue_thread (minus_one_ptid);
|
||
|
||
/* Without this, some commands which require an active target
|
||
(such as kill) won't work. This variable serves (at least)
|
||
double duty as both the pid of the target process (if it has
|
||
such), and as a flag indicating that a target is active.
|
||
These functions should be split out into seperate variables,
|
||
especially since GDB will someday have a notion of debugging
|
||
several processes. */
|
||
inferior_ptid = magic_null_ptid;
|
||
|
||
/* Now, if we have thread information, update inferior_ptid. */
|
||
inferior_ptid = remote_current_thread (inferior_ptid);
|
||
|
||
remote_add_inferior (ptid_get_pid (inferior_ptid), -1);
|
||
|
||
/* Always add the main thread. */
|
||
add_thread_silent (inferior_ptid);
|
||
|
||
get_offsets (); /* Get text, data & bss offsets. */
|
||
|
||
/* If we could not find a description using qXfer, and we know
|
||
how to do it some other way, try again. This is not
|
||
supported for non-stop; it could be, but it is tricky if
|
||
there are no stopped threads when we connect. */
|
||
if (remote_read_description_p (args->target)
|
||
&& gdbarch_target_desc (target_gdbarch) == NULL)
|
||
{
|
||
target_clear_description ();
|
||
target_find_description ();
|
||
}
|
||
|
||
/* Use the previously fetched status. */
|
||
gdb_assert (wait_status != NULL);
|
||
strcpy (rs->buf, wait_status);
|
||
rs->cached_wait_status = 1;
|
||
|
||
immediate_quit--;
|
||
start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
|
||
}
|
||
else
|
||
{
|
||
/* Clear WFI global state. Do this before finding about new
|
||
threads and inferiors, and setting the current inferior.
|
||
Otherwise we would clear the proceed status of the current
|
||
inferior when we want its stop_soon state to be preserved
|
||
(see notice_new_inferior). */
|
||
init_wait_for_inferior ();
|
||
|
||
/* In non-stop, we will either get an "OK", meaning that there
|
||
are no stopped threads at this time; or, a regular stop
|
||
reply. In the latter case, there may be more than one thread
|
||
stopped --- we pull them all out using the vStopped
|
||
mechanism. */
|
||
if (strcmp (rs->buf, "OK") != 0)
|
||
{
|
||
struct stop_reply *stop_reply;
|
||
struct cleanup *old_chain;
|
||
|
||
stop_reply = stop_reply_xmalloc ();
|
||
old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
|
||
|
||
remote_parse_stop_reply (rs->buf, stop_reply);
|
||
discard_cleanups (old_chain);
|
||
|
||
/* get_pending_stop_replies acks this one, and gets the rest
|
||
out. */
|
||
pending_stop_reply = stop_reply;
|
||
remote_get_pending_stop_replies ();
|
||
|
||
/* Make sure that threads that were stopped remain
|
||
stopped. */
|
||
iterate_over_threads (set_stop_requested_callback, NULL);
|
||
}
|
||
|
||
if (target_can_async_p ())
|
||
target_async (inferior_event_handler, 0);
|
||
|
||
if (thread_count () == 0)
|
||
{
|
||
if (!args->extended_p)
|
||
error (_("The target is not running (try extended-remote?)"));
|
||
|
||
/* We're connected, but not running. Drop out before we
|
||
call start_remote. */
|
||
return;
|
||
}
|
||
|
||
/* Let the stub know that we want it to return the thread. */
|
||
|
||
/* Force the stub to choose a thread. */
|
||
set_general_thread (null_ptid);
|
||
|
||
/* Query it. */
|
||
inferior_ptid = remote_current_thread (minus_one_ptid);
|
||
if (ptid_equal (inferior_ptid, minus_one_ptid))
|
||
error (_("remote didn't report the current thread in non-stop mode"));
|
||
|
||
get_offsets (); /* Get text, data & bss offsets. */
|
||
|
||
/* In non-stop mode, any cached wait status will be stored in
|
||
the stop reply queue. */
|
||
gdb_assert (wait_status == NULL);
|
||
}
|
||
|
||
/* If we connected to a live target, do some additional setup. */
|
||
if (target_has_execution)
|
||
{
|
||
if (exec_bfd) /* No use without an exec file. */
|
||
remote_check_symbols (symfile_objfile);
|
||
}
|
||
|
||
/* If breakpoints are global, insert them now. */
|
||
if (gdbarch_has_global_breakpoints (target_gdbarch)
|
||
&& breakpoints_always_inserted_mode ())
|
||
insert_breakpoints ();
|
||
}
|
||
|
||
/* Open a connection to a remote debugger.
|
||
NAME is the filename used for communication. */
|
||
|
||
static void
|
||
remote_open (char *name, int from_tty)
|
||
{
|
||
remote_open_1 (name, from_tty, &remote_ops, 0);
|
||
}
|
||
|
||
/* Open a connection to a remote debugger using the extended
|
||
remote gdb protocol. NAME is the filename used for communication. */
|
||
|
||
static void
|
||
extended_remote_open (char *name, int from_tty)
|
||
{
|
||
remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
|
||
}
|
||
|
||
/* Generic code for opening a connection to a remote target. */
|
||
|
||
static void
|
||
init_all_packet_configs (void)
|
||
{
|
||
int i;
|
||
for (i = 0; i < PACKET_MAX; i++)
|
||
update_packet_config (&remote_protocol_packets[i]);
|
||
}
|
||
|
||
/* Symbol look-up. */
|
||
|
||
static void
|
||
remote_check_symbols (struct objfile *objfile)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *msg, *reply, *tmp;
|
||
struct minimal_symbol *sym;
|
||
int end;
|
||
|
||
if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
|
||
return;
|
||
|
||
/* Make sure the remote is pointing at the right process. */
|
||
set_general_process ();
|
||
|
||
/* Allocate a message buffer. We can't reuse the input buffer in RS,
|
||
because we need both at the same time. */
|
||
msg = alloca (get_remote_packet_size ());
|
||
|
||
/* Invite target to request symbol lookups. */
|
||
|
||
putpkt ("qSymbol::");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
|
||
reply = rs->buf;
|
||
|
||
while (strncmp (reply, "qSymbol:", 8) == 0)
|
||
{
|
||
tmp = &reply[8];
|
||
end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
|
||
msg[end] = '\0';
|
||
sym = lookup_minimal_symbol (msg, NULL, NULL);
|
||
if (sym == NULL)
|
||
xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
|
||
else
|
||
{
|
||
int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
|
||
CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
|
||
|
||
/* If this is a function address, return the start of code
|
||
instead of any data function descriptor. */
|
||
sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
|
||
sym_addr,
|
||
¤t_target);
|
||
|
||
xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
|
||
phex_nz (sym_addr, addr_size), &reply[8]);
|
||
}
|
||
|
||
putpkt (msg);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
reply = rs->buf;
|
||
}
|
||
}
|
||
|
||
static struct serial *
|
||
remote_serial_open (char *name)
|
||
{
|
||
static int udp_warning = 0;
|
||
|
||
/* FIXME: Parsing NAME here is a hack. But we want to warn here instead
|
||
of in ser-tcp.c, because it is the remote protocol assuming that the
|
||
serial connection is reliable and not the serial connection promising
|
||
to be. */
|
||
if (!udp_warning && strncmp (name, "udp:", 4) == 0)
|
||
{
|
||
warning (_("\
|
||
The remote protocol may be unreliable over UDP.\n\
|
||
Some events may be lost, rendering further debugging impossible."));
|
||
udp_warning = 1;
|
||
}
|
||
|
||
return serial_open (name);
|
||
}
|
||
|
||
/* This type describes each known response to the qSupported
|
||
packet. */
|
||
struct protocol_feature
|
||
{
|
||
/* The name of this protocol feature. */
|
||
const char *name;
|
||
|
||
/* The default for this protocol feature. */
|
||
enum packet_support default_support;
|
||
|
||
/* The function to call when this feature is reported, or after
|
||
qSupported processing if the feature is not supported.
|
||
The first argument points to this structure. The second
|
||
argument indicates whether the packet requested support be
|
||
enabled, disabled, or probed (or the default, if this function
|
||
is being called at the end of processing and this feature was
|
||
not reported). The third argument may be NULL; if not NULL, it
|
||
is a NUL-terminated string taken from the packet following
|
||
this feature's name and an equals sign. */
|
||
void (*func) (const struct protocol_feature *, enum packet_support,
|
||
const char *);
|
||
|
||
/* The corresponding packet for this feature. Only used if
|
||
FUNC is remote_supported_packet. */
|
||
int packet;
|
||
};
|
||
|
||
static void
|
||
remote_supported_packet (const struct protocol_feature *feature,
|
||
enum packet_support support,
|
||
const char *argument)
|
||
{
|
||
if (argument)
|
||
{
|
||
warning (_("Remote qSupported response supplied an unexpected value for"
|
||
" \"%s\"."), feature->name);
|
||
return;
|
||
}
|
||
|
||
if (remote_protocol_packets[feature->packet].support
|
||
== PACKET_SUPPORT_UNKNOWN)
|
||
remote_protocol_packets[feature->packet].support = support;
|
||
}
|
||
|
||
static void
|
||
remote_packet_size (const struct protocol_feature *feature,
|
||
enum packet_support support, const char *value)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
int packet_size;
|
||
char *value_end;
|
||
|
||
if (support != PACKET_ENABLE)
|
||
return;
|
||
|
||
if (value == NULL || *value == '\0')
|
||
{
|
||
warning (_("Remote target reported \"%s\" without a size."),
|
||
feature->name);
|
||
return;
|
||
}
|
||
|
||
errno = 0;
|
||
packet_size = strtol (value, &value_end, 16);
|
||
if (errno != 0 || *value_end != '\0' || packet_size < 0)
|
||
{
|
||
warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
|
||
feature->name, value);
|
||
return;
|
||
}
|
||
|
||
if (packet_size > MAX_REMOTE_PACKET_SIZE)
|
||
{
|
||
warning (_("limiting remote suggested packet size (%d bytes) to %d"),
|
||
packet_size, MAX_REMOTE_PACKET_SIZE);
|
||
packet_size = MAX_REMOTE_PACKET_SIZE;
|
||
}
|
||
|
||
/* Record the new maximum packet size. */
|
||
rs->explicit_packet_size = packet_size;
|
||
}
|
||
|
||
static void
|
||
remote_multi_process_feature (const struct protocol_feature *feature,
|
||
enum packet_support support, const char *value)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
rs->multi_process_aware = (support == PACKET_ENABLE);
|
||
}
|
||
|
||
static void
|
||
remote_non_stop_feature (const struct protocol_feature *feature,
|
||
enum packet_support support, const char *value)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
rs->non_stop_aware = (support == PACKET_ENABLE);
|
||
}
|
||
|
||
static void
|
||
remote_cond_tracepoint_feature (const struct protocol_feature *feature,
|
||
enum packet_support support,
|
||
const char *value)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
rs->cond_tracepoints = (support == PACKET_ENABLE);
|
||
}
|
||
|
||
static struct protocol_feature remote_protocol_features[] = {
|
||
{ "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
|
||
{ "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_auxv },
|
||
{ "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_features },
|
||
{ "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_libraries },
|
||
{ "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_memory_map },
|
||
{ "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_spu_read },
|
||
{ "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_spu_write },
|
||
{ "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_osdata },
|
||
{ "QPassSignals", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_QPassSignals },
|
||
{ "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_QStartNoAckMode },
|
||
{ "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
|
||
{ "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 },
|
||
{ "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_siginfo_read },
|
||
{ "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
|
||
PACKET_qXfer_siginfo_write },
|
||
{ "ConditionalTracepoints", PACKET_DISABLE, remote_cond_tracepoint_feature,
|
||
PACKET_ConditionalTracepoints },
|
||
};
|
||
|
||
static void
|
||
remote_query_supported (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *next;
|
||
int i;
|
||
unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
|
||
|
||
/* The packet support flags are handled differently for this packet
|
||
than for most others. We treat an error, a disabled packet, and
|
||
an empty response identically: any features which must be reported
|
||
to be used will be automatically disabled. An empty buffer
|
||
accomplishes this, since that is also the representation for a list
|
||
containing no features. */
|
||
|
||
rs->buf[0] = 0;
|
||
if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
|
||
{
|
||
if (rs->extended)
|
||
putpkt ("qSupported:multiprocess+");
|
||
else
|
||
putpkt ("qSupported");
|
||
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
/* If an error occured, warn, but do not return - just reset the
|
||
buffer to empty and go on to disable features. */
|
||
if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
|
||
== PACKET_ERROR)
|
||
{
|
||
warning (_("Remote failure reply: %s"), rs->buf);
|
||
rs->buf[0] = 0;
|
||
}
|
||
}
|
||
|
||
memset (seen, 0, sizeof (seen));
|
||
|
||
next = rs->buf;
|
||
while (*next)
|
||
{
|
||
enum packet_support is_supported;
|
||
char *p, *end, *name_end, *value;
|
||
|
||
/* First separate out this item from the rest of the packet. If
|
||
there's another item after this, we overwrite the separator
|
||
(terminated strings are much easier to work with). */
|
||
p = next;
|
||
end = strchr (p, ';');
|
||
if (end == NULL)
|
||
{
|
||
end = p + strlen (p);
|
||
next = end;
|
||
}
|
||
else
|
||
{
|
||
*end = '\0';
|
||
next = end + 1;
|
||
|
||
if (end == p)
|
||
{
|
||
warning (_("empty item in \"qSupported\" response"));
|
||
continue;
|
||
}
|
||
}
|
||
|
||
name_end = strchr (p, '=');
|
||
if (name_end)
|
||
{
|
||
/* This is a name=value entry. */
|
||
is_supported = PACKET_ENABLE;
|
||
value = name_end + 1;
|
||
*name_end = '\0';
|
||
}
|
||
else
|
||
{
|
||
value = NULL;
|
||
switch (end[-1])
|
||
{
|
||
case '+':
|
||
is_supported = PACKET_ENABLE;
|
||
break;
|
||
|
||
case '-':
|
||
is_supported = PACKET_DISABLE;
|
||
break;
|
||
|
||
case '?':
|
||
is_supported = PACKET_SUPPORT_UNKNOWN;
|
||
break;
|
||
|
||
default:
|
||
warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
|
||
continue;
|
||
}
|
||
end[-1] = '\0';
|
||
}
|
||
|
||
for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
|
||
if (strcmp (remote_protocol_features[i].name, p) == 0)
|
||
{
|
||
const struct protocol_feature *feature;
|
||
|
||
seen[i] = 1;
|
||
feature = &remote_protocol_features[i];
|
||
feature->func (feature, is_supported, value);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* If we increased the packet size, make sure to increase the global
|
||
buffer size also. We delay this until after parsing the entire
|
||
qSupported packet, because this is the same buffer we were
|
||
parsing. */
|
||
if (rs->buf_size < rs->explicit_packet_size)
|
||
{
|
||
rs->buf_size = rs->explicit_packet_size;
|
||
rs->buf = xrealloc (rs->buf, rs->buf_size);
|
||
}
|
||
|
||
/* Handle the defaults for unmentioned features. */
|
||
for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
|
||
if (!seen[i])
|
||
{
|
||
const struct protocol_feature *feature;
|
||
|
||
feature = &remote_protocol_features[i];
|
||
feature->func (feature, feature->default_support, NULL);
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (name == 0)
|
||
error (_("To open a remote debug connection, you need to specify what\n"
|
||
"serial device is attached to the remote system\n"
|
||
"(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
|
||
|
||
/* See FIXME above. */
|
||
if (!target_async_permitted)
|
||
wait_forever_enabled_p = 1;
|
||
|
||
/* If we're connected to a running target, target_preopen will kill it.
|
||
But if we're connected to a target system with no running process,
|
||
then we will still be connected when it returns. Ask this question
|
||
first, before target_preopen has a chance to kill anything. */
|
||
if (remote_desc != NULL && !have_inferiors ())
|
||
{
|
||
if (!from_tty
|
||
|| query (_("Already connected to a remote target. Disconnect? ")))
|
||
pop_target ();
|
||
else
|
||
error (_("Still connected."));
|
||
}
|
||
|
||
target_preopen (from_tty);
|
||
|
||
unpush_target (target);
|
||
|
||
/* This time without a query. If we were connected to an
|
||
extended-remote target and target_preopen killed the running
|
||
process, we may still be connected. If we are starting "target
|
||
remote" now, the extended-remote target will not have been
|
||
removed by unpush_target. */
|
||
if (remote_desc != NULL && !have_inferiors ())
|
||
pop_target ();
|
||
|
||
/* Make sure we send the passed signals list the next time we resume. */
|
||
xfree (last_pass_packet);
|
||
last_pass_packet = NULL;
|
||
|
||
remote_fileio_reset ();
|
||
reopen_exec_file ();
|
||
reread_symbols ();
|
||
|
||
remote_desc = remote_serial_open (name);
|
||
if (!remote_desc)
|
||
perror_with_name (name);
|
||
|
||
if (baud_rate != -1)
|
||
{
|
||
if (serial_setbaudrate (remote_desc, baud_rate))
|
||
{
|
||
/* The requested speed could not be set. Error out to
|
||
top level after closing remote_desc. Take care to
|
||
set remote_desc to NULL to avoid closing remote_desc
|
||
more than once. */
|
||
serial_close (remote_desc);
|
||
remote_desc = NULL;
|
||
perror_with_name (name);
|
||
}
|
||
}
|
||
|
||
serial_raw (remote_desc);
|
||
|
||
/* If there is something sitting in the buffer we might take it as a
|
||
response to a command, which would be bad. */
|
||
serial_flush_input (remote_desc);
|
||
|
||
if (from_tty)
|
||
{
|
||
puts_filtered ("Remote debugging using ");
|
||
puts_filtered (name);
|
||
puts_filtered ("\n");
|
||
}
|
||
push_target (target); /* Switch to using remote target now. */
|
||
|
||
/* Register extra event sources in the event loop. */
|
||
remote_async_inferior_event_token
|
||
= create_async_event_handler (remote_async_inferior_event_handler,
|
||
NULL);
|
||
remote_async_get_pending_events_token
|
||
= create_async_event_handler (remote_async_get_pending_events_handler,
|
||
NULL);
|
||
|
||
/* Reset the target state; these things will be queried either by
|
||
remote_query_supported or as they are needed. */
|
||
init_all_packet_configs ();
|
||
rs->cached_wait_status = 0;
|
||
rs->explicit_packet_size = 0;
|
||
rs->noack_mode = 0;
|
||
rs->multi_process_aware = 0;
|
||
rs->extended = extended_p;
|
||
rs->non_stop_aware = 0;
|
||
rs->waiting_for_stop_reply = 0;
|
||
|
||
general_thread = not_sent_ptid;
|
||
continue_thread = not_sent_ptid;
|
||
|
||
/* Probe for ability to use "ThreadInfo" query, as required. */
|
||
use_threadinfo_query = 1;
|
||
use_threadextra_query = 1;
|
||
|
||
if (target_async_permitted)
|
||
{
|
||
/* With this target we start out by owning the terminal. */
|
||
remote_async_terminal_ours_p = 1;
|
||
|
||
/* FIXME: cagney/1999-09-23: During the initial connection it is
|
||
assumed that the target is already ready and able to respond to
|
||
requests. Unfortunately remote_start_remote() eventually calls
|
||
wait_for_inferior() with no timeout. wait_forever_enabled_p gets
|
||
around this. Eventually a mechanism that allows
|
||
wait_for_inferior() to expect/get timeouts will be
|
||
implemented. */
|
||
wait_forever_enabled_p = 0;
|
||
}
|
||
|
||
/* First delete any symbols previously loaded from shared libraries. */
|
||
no_shared_libraries (NULL, 0);
|
||
|
||
/* Start afresh. */
|
||
init_thread_list ();
|
||
|
||
/* Start the remote connection. If error() or QUIT, discard this
|
||
target (we'd otherwise be in an inconsistent state) and then
|
||
propogate the error on up the exception chain. This ensures that
|
||
the caller doesn't stumble along blindly assuming that the
|
||
function succeeded. The CLI doesn't have this problem but other
|
||
UI's, such as MI do.
|
||
|
||
FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
|
||
this function should return an error indication letting the
|
||
caller restore the previous state. Unfortunately the command
|
||
``target remote'' is directly wired to this function making that
|
||
impossible. On a positive note, the CLI side of this problem has
|
||
been fixed - the function set_cmd_context() makes it possible for
|
||
all the ``target ....'' commands to share a common callback
|
||
function. See cli-dump.c. */
|
||
{
|
||
struct gdb_exception ex;
|
||
struct start_remote_args args;
|
||
|
||
args.from_tty = from_tty;
|
||
args.target = target;
|
||
args.extended_p = extended_p;
|
||
|
||
ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
|
||
if (ex.reason < 0)
|
||
{
|
||
/* Pop the partially set up target - unless something else did
|
||
already before throwing the exception. */
|
||
if (remote_desc != NULL)
|
||
pop_target ();
|
||
if (target_async_permitted)
|
||
wait_forever_enabled_p = 1;
|
||
throw_exception (ex);
|
||
}
|
||
}
|
||
|
||
if (target_async_permitted)
|
||
wait_forever_enabled_p = 1;
|
||
}
|
||
|
||
/* This takes a program previously attached to and detaches it. After
|
||
this is done, GDB can be used to debug some other program. We
|
||
better not have left any breakpoints in the target program or it'll
|
||
die when it hits one. */
|
||
|
||
static void
|
||
remote_detach_1 (char *args, int from_tty, int extended)
|
||
{
|
||
int pid = ptid_get_pid (inferior_ptid);
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (args)
|
||
error (_("Argument given to \"detach\" when remotely debugging."));
|
||
|
||
if (!target_has_execution)
|
||
error (_("No process to detach from."));
|
||
|
||
/* Tell the remote target to detach. */
|
||
if (remote_multi_process_p (rs))
|
||
sprintf (rs->buf, "D;%x", pid);
|
||
else
|
||
strcpy (rs->buf, "D");
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
|
||
;
|
||
else if (rs->buf[0] == '\0')
|
||
error (_("Remote doesn't know how to detach"));
|
||
else
|
||
error (_("Can't detach process."));
|
||
|
||
if (from_tty)
|
||
{
|
||
if (remote_multi_process_p (rs))
|
||
printf_filtered (_("Detached from remote %s.\n"),
|
||
target_pid_to_str (pid_to_ptid (pid)));
|
||
else
|
||
{
|
||
if (extended)
|
||
puts_filtered (_("Detached from remote process.\n"));
|
||
else
|
||
puts_filtered (_("Ending remote debugging.\n"));
|
||
}
|
||
}
|
||
|
||
discard_pending_stop_replies (pid);
|
||
target_mourn_inferior ();
|
||
}
|
||
|
||
static void
|
||
remote_detach (struct target_ops *ops, char *args, int from_tty)
|
||
{
|
||
remote_detach_1 (args, from_tty, 0);
|
||
}
|
||
|
||
static void
|
||
extended_remote_detach (struct target_ops *ops, char *args, int from_tty)
|
||
{
|
||
remote_detach_1 (args, from_tty, 1);
|
||
}
|
||
|
||
/* Same as remote_detach, but don't send the "D" packet; just disconnect. */
|
||
|
||
static void
|
||
remote_disconnect (struct target_ops *target, char *args, int from_tty)
|
||
{
|
||
if (args)
|
||
error (_("Argument given to \"disconnect\" when remotely debugging."));
|
||
|
||
/* Make sure we unpush even the extended remote targets; mourn
|
||
won't do it. So call remote_mourn_1 directly instead of
|
||
target_mourn_inferior. */
|
||
remote_mourn_1 (target);
|
||
|
||
if (from_tty)
|
||
puts_filtered ("Ending remote debugging.\n");
|
||
}
|
||
|
||
/* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
|
||
be chatty about it. */
|
||
|
||
static void
|
||
extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int pid;
|
||
char *dummy;
|
||
char *wait_status = NULL;
|
||
|
||
if (!args)
|
||
error_no_arg (_("process-id to attach"));
|
||
|
||
dummy = args;
|
||
pid = strtol (args, &dummy, 0);
|
||
/* Some targets don't set errno on errors, grrr! */
|
||
if (pid == 0 && args == dummy)
|
||
error (_("Illegal process-id: %s."), args);
|
||
|
||
if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
|
||
error (_("This target does not support attaching to a process"));
|
||
|
||
sprintf (rs->buf, "vAttach;%x", pid);
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
|
||
{
|
||
if (from_tty)
|
||
printf_unfiltered (_("Attached to %s\n"),
|
||
target_pid_to_str (pid_to_ptid (pid)));
|
||
|
||
if (!non_stop)
|
||
{
|
||
/* Save the reply for later. */
|
||
wait_status = alloca (strlen (rs->buf) + 1);
|
||
strcpy (wait_status, rs->buf);
|
||
}
|
||
else if (strcmp (rs->buf, "OK") != 0)
|
||
error (_("Attaching to %s failed with: %s"),
|
||
target_pid_to_str (pid_to_ptid (pid)),
|
||
rs->buf);
|
||
}
|
||
else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
|
||
error (_("This target does not support attaching to a process"));
|
||
else
|
||
error (_("Attaching to %s failed"),
|
||
target_pid_to_str (pid_to_ptid (pid)));
|
||
|
||
remote_add_inferior (pid, 1);
|
||
|
||
inferior_ptid = pid_to_ptid (pid);
|
||
|
||
if (non_stop)
|
||
{
|
||
struct thread_info *thread;
|
||
|
||
/* Get list of threads. */
|
||
remote_threads_info (target);
|
||
|
||
thread = first_thread_of_process (pid);
|
||
if (thread)
|
||
inferior_ptid = thread->ptid;
|
||
else
|
||
inferior_ptid = pid_to_ptid (pid);
|
||
|
||
/* Invalidate our notion of the remote current thread. */
|
||
record_currthread (minus_one_ptid);
|
||
}
|
||
else
|
||
{
|
||
/* Now, if we have thread information, update inferior_ptid. */
|
||
inferior_ptid = remote_current_thread (inferior_ptid);
|
||
|
||
/* Add the main thread to the thread list. */
|
||
add_thread_silent (inferior_ptid);
|
||
}
|
||
|
||
/* Next, if the target can specify a description, read it. We do
|
||
this before anything involving memory or registers. */
|
||
target_find_description ();
|
||
|
||
if (!non_stop)
|
||
{
|
||
/* Use the previously fetched status. */
|
||
gdb_assert (wait_status != NULL);
|
||
|
||
if (target_can_async_p ())
|
||
{
|
||
struct stop_reply *stop_reply;
|
||
struct cleanup *old_chain;
|
||
|
||
stop_reply = stop_reply_xmalloc ();
|
||
old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
|
||
remote_parse_stop_reply (wait_status, stop_reply);
|
||
discard_cleanups (old_chain);
|
||
push_stop_reply (stop_reply);
|
||
|
||
target_async (inferior_event_handler, 0);
|
||
}
|
||
else
|
||
{
|
||
gdb_assert (wait_status != NULL);
|
||
strcpy (rs->buf, wait_status);
|
||
rs->cached_wait_status = 1;
|
||
}
|
||
}
|
||
else
|
||
gdb_assert (wait_status == NULL);
|
||
}
|
||
|
||
static void
|
||
extended_remote_attach (struct target_ops *ops, char *args, int from_tty)
|
||
{
|
||
extended_remote_attach_1 (ops, args, from_tty);
|
||
}
|
||
|
||
/* Convert hex digit A to a number. */
|
||
|
||
static int
|
||
fromhex (int a)
|
||
{
|
||
if (a >= '0' && a <= '9')
|
||
return a - '0';
|
||
else if (a >= 'a' && a <= 'f')
|
||
return a - 'a' + 10;
|
||
else if (a >= 'A' && a <= 'F')
|
||
return a - 'A' + 10;
|
||
else
|
||
error (_("Reply contains invalid hex digit %d"), a);
|
||
}
|
||
|
||
static int
|
||
hex2bin (const char *hex, gdb_byte *bin, int count)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
if (hex[0] == 0 || hex[1] == 0)
|
||
{
|
||
/* Hex string is short, or of uneven length.
|
||
Return the count that has been converted so far. */
|
||
return i;
|
||
}
|
||
*bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
|
||
hex += 2;
|
||
}
|
||
return i;
|
||
}
|
||
|
||
/* Convert number NIB to a hex digit. */
|
||
|
||
static int
|
||
tohex (int nib)
|
||
{
|
||
if (nib < 10)
|
||
return '0' + nib;
|
||
else
|
||
return 'a' + nib - 10;
|
||
}
|
||
|
||
static int
|
||
bin2hex (const gdb_byte *bin, char *hex, int count)
|
||
{
|
||
int i;
|
||
/* May use a length, or a nul-terminated string as input. */
|
||
if (count == 0)
|
||
count = strlen ((char *) bin);
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
*hex++ = tohex ((*bin >> 4) & 0xf);
|
||
*hex++ = tohex (*bin++ & 0xf);
|
||
}
|
||
*hex = 0;
|
||
return i;
|
||
}
|
||
|
||
/* Check for the availability of vCont. This function should also check
|
||
the response. */
|
||
|
||
static void
|
||
remote_vcont_probe (struct remote_state *rs)
|
||
{
|
||
char *buf;
|
||
|
||
strcpy (rs->buf, "vCont?");
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
buf = rs->buf;
|
||
|
||
/* Make sure that the features we assume are supported. */
|
||
if (strncmp (buf, "vCont", 5) == 0)
|
||
{
|
||
char *p = &buf[5];
|
||
int support_s, support_S, support_c, support_C;
|
||
|
||
support_s = 0;
|
||
support_S = 0;
|
||
support_c = 0;
|
||
support_C = 0;
|
||
rs->support_vCont_t = 0;
|
||
while (p && *p == ';')
|
||
{
|
||
p++;
|
||
if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
|
||
support_s = 1;
|
||
else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
|
||
support_S = 1;
|
||
else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
|
||
support_c = 1;
|
||
else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
|
||
support_C = 1;
|
||
else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
|
||
rs->support_vCont_t = 1;
|
||
|
||
p = strchr (p, ';');
|
||
}
|
||
|
||
/* If s, S, c, and C are not all supported, we can't use vCont. Clearing
|
||
BUF will make packet_ok disable the packet. */
|
||
if (!support_s || !support_S || !support_c || !support_C)
|
||
buf[0] = 0;
|
||
}
|
||
|
||
packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
|
||
}
|
||
|
||
/* Helper function for building "vCont" resumptions. Write a
|
||
resumption to P. ENDP points to one-passed-the-end of the buffer
|
||
we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
|
||
thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
|
||
resumed thread should be single-stepped and/or signalled. If PTID
|
||
equals minus_one_ptid, then all threads are resumed; if PTID
|
||
represents a process, then all threads of the process are resumed;
|
||
the thread to be stepped and/or signalled is given in the global
|
||
INFERIOR_PTID. */
|
||
|
||
static char *
|
||
append_resumption (char *p, char *endp,
|
||
ptid_t ptid, int step, enum target_signal siggnal)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (step && siggnal != TARGET_SIGNAL_0)
|
||
p += xsnprintf (p, endp - p, ";S%02x", siggnal);
|
||
else if (step)
|
||
p += xsnprintf (p, endp - p, ";s");
|
||
else if (siggnal != TARGET_SIGNAL_0)
|
||
p += xsnprintf (p, endp - p, ";C%02x", siggnal);
|
||
else
|
||
p += xsnprintf (p, endp - p, ";c");
|
||
|
||
if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
|
||
{
|
||
ptid_t nptid;
|
||
|
||
/* All (-1) threads of process. */
|
||
nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
|
||
|
||
p += xsnprintf (p, endp - p, ":");
|
||
p = write_ptid (p, endp, nptid);
|
||
}
|
||
else if (!ptid_equal (ptid, minus_one_ptid))
|
||
{
|
||
p += xsnprintf (p, endp - p, ":");
|
||
p = write_ptid (p, endp, ptid);
|
||
}
|
||
|
||
return p;
|
||
}
|
||
|
||
/* Resume the remote inferior by using a "vCont" packet. The thread
|
||
to be resumed is PTID; STEP and SIGGNAL indicate whether the
|
||
resumed thread should be single-stepped and/or signalled. If PTID
|
||
equals minus_one_ptid, then all threads are resumed; the thread to
|
||
be stepped and/or signalled is given in the global INFERIOR_PTID.
|
||
This function returns non-zero iff it resumes the inferior.
|
||
|
||
This function issues a strict subset of all possible vCont commands at the
|
||
moment. */
|
||
|
||
static int
|
||
remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p;
|
||
char *endp;
|
||
|
||
if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
|
||
remote_vcont_probe (rs);
|
||
|
||
if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
|
||
return 0;
|
||
|
||
p = rs->buf;
|
||
endp = rs->buf + get_remote_packet_size ();
|
||
|
||
/* If we could generate a wider range of packets, we'd have to worry
|
||
about overflowing BUF. Should there be a generic
|
||
"multi-part-packet" packet? */
|
||
|
||
p += xsnprintf (p, endp - p, "vCont");
|
||
|
||
if (ptid_equal (ptid, magic_null_ptid))
|
||
{
|
||
/* MAGIC_NULL_PTID means that we don't have any active threads,
|
||
so we don't have any TID numbers the inferior will
|
||
understand. Make sure to only send forms that do not specify
|
||
a TID. */
|
||
p = append_resumption (p, endp, minus_one_ptid, step, siggnal);
|
||
}
|
||
else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
|
||
{
|
||
/* Resume all threads (of all processes, or of a single
|
||
process), with preference for INFERIOR_PTID. This assumes
|
||
inferior_ptid belongs to the set of all threads we are about
|
||
to resume. */
|
||
if (step || siggnal != TARGET_SIGNAL_0)
|
||
{
|
||
/* Step inferior_ptid, with or without signal. */
|
||
p = append_resumption (p, endp, inferior_ptid, step, siggnal);
|
||
}
|
||
|
||
/* And continue others without a signal. */
|
||
p = append_resumption (p, endp, ptid, /*step=*/ 0, TARGET_SIGNAL_0);
|
||
}
|
||
else
|
||
{
|
||
/* Scheduler locking; resume only PTID. */
|
||
p = append_resumption (p, endp, ptid, step, siggnal);
|
||
}
|
||
|
||
gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
|
||
putpkt (rs->buf);
|
||
|
||
if (non_stop)
|
||
{
|
||
/* In non-stop, the stub replies to vCont with "OK". The stop
|
||
reply will be reported asynchronously by means of a `%Stop'
|
||
notification. */
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (strcmp (rs->buf, "OK") != 0)
|
||
error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Tell the remote machine to resume. */
|
||
|
||
static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
|
||
|
||
static int last_sent_step;
|
||
|
||
static void
|
||
remote_resume (struct target_ops *ops,
|
||
ptid_t ptid, int step, enum target_signal siggnal)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *buf;
|
||
|
||
last_sent_signal = siggnal;
|
||
last_sent_step = step;
|
||
|
||
/* Update the inferior on signals to silently pass, if they've changed. */
|
||
remote_pass_signals ();
|
||
|
||
/* The vCont packet doesn't need to specify threads via Hc. */
|
||
if (remote_vcont_resume (ptid, step, siggnal))
|
||
goto done;
|
||
|
||
/* All other supported resume packets do use Hc, so set the continue
|
||
thread. */
|
||
if (ptid_equal (ptid, minus_one_ptid))
|
||
set_continue_thread (any_thread_ptid);
|
||
else
|
||
set_continue_thread (ptid);
|
||
|
||
buf = rs->buf;
|
||
if (execution_direction == EXEC_REVERSE)
|
||
{
|
||
/* We don't pass signals to the target in reverse exec mode. */
|
||
if (info_verbose && siggnal != TARGET_SIGNAL_0)
|
||
warning (" - Can't pass signal %d to target in reverse: ignored.\n",
|
||
siggnal);
|
||
strcpy (buf, step ? "bs" : "bc");
|
||
}
|
||
else if (siggnal != TARGET_SIGNAL_0)
|
||
{
|
||
buf[0] = step ? 'S' : 'C';
|
||
buf[1] = tohex (((int) siggnal >> 4) & 0xf);
|
||
buf[2] = tohex (((int) siggnal) & 0xf);
|
||
buf[3] = '\0';
|
||
}
|
||
else
|
||
strcpy (buf, step ? "s" : "c");
|
||
|
||
putpkt (buf);
|
||
|
||
done:
|
||
/* We are about to start executing the inferior, let's register it
|
||
with the event loop. NOTE: this is the one place where all the
|
||
execution commands end up. We could alternatively do this in each
|
||
of the execution commands in infcmd.c. */
|
||
/* FIXME: ezannoni 1999-09-28: We may need to move this out of here
|
||
into infcmd.c in order to allow inferior function calls to work
|
||
NOT asynchronously. */
|
||
if (target_can_async_p ())
|
||
target_async (inferior_event_handler, 0);
|
||
|
||
/* We've just told the target to resume. The remote server will
|
||
wait for the inferior to stop, and then send a stop reply. In
|
||
the mean time, we can't start another command/query ourselves
|
||
because the stub wouldn't be ready to process it. This applies
|
||
only to the base all-stop protocol, however. In non-stop (which
|
||
only supports vCont), the stub replies with an "OK", and is
|
||
immediate able to process further serial input. */
|
||
if (!non_stop)
|
||
rs->waiting_for_stop_reply = 1;
|
||
}
|
||
|
||
|
||
/* Set up the signal handler for SIGINT, while the target is
|
||
executing, ovewriting the 'regular' SIGINT signal handler. */
|
||
static void
|
||
initialize_sigint_signal_handler (void)
|
||
{
|
||
signal (SIGINT, handle_remote_sigint);
|
||
}
|
||
|
||
/* Signal handler for SIGINT, while the target is executing. */
|
||
static void
|
||
handle_remote_sigint (int sig)
|
||
{
|
||
signal (sig, handle_remote_sigint_twice);
|
||
mark_async_signal_handler_wrapper (sigint_remote_token);
|
||
}
|
||
|
||
/* Signal handler for SIGINT, installed after SIGINT has already been
|
||
sent once. It will take effect the second time that the user sends
|
||
a ^C. */
|
||
static void
|
||
handle_remote_sigint_twice (int sig)
|
||
{
|
||
signal (sig, handle_remote_sigint);
|
||
mark_async_signal_handler_wrapper (sigint_remote_twice_token);
|
||
}
|
||
|
||
/* Perform the real interruption of the target execution, in response
|
||
to a ^C. */
|
||
static void
|
||
async_remote_interrupt (gdb_client_data arg)
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
|
||
|
||
target_stop (inferior_ptid);
|
||
}
|
||
|
||
/* Perform interrupt, if the first attempt did not succeed. Just give
|
||
up on the target alltogether. */
|
||
void
|
||
async_remote_interrupt_twice (gdb_client_data arg)
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
|
||
|
||
interrupt_query ();
|
||
}
|
||
|
||
/* Reinstall the usual SIGINT handlers, after the target has
|
||
stopped. */
|
||
static void
|
||
cleanup_sigint_signal_handler (void *dummy)
|
||
{
|
||
signal (SIGINT, handle_sigint);
|
||
}
|
||
|
||
/* Send ^C to target to halt it. Target will respond, and send us a
|
||
packet. */
|
||
static void (*ofunc) (int);
|
||
|
||
/* The command line interface's stop routine. This function is installed
|
||
as a signal handler for SIGINT. The first time a user requests a
|
||
stop, we call remote_stop to send a break or ^C. If there is no
|
||
response from the target (it didn't stop when the user requested it),
|
||
we ask the user if he'd like to detach from the target. */
|
||
static void
|
||
remote_interrupt (int signo)
|
||
{
|
||
/* If this doesn't work, try more severe steps. */
|
||
signal (signo, remote_interrupt_twice);
|
||
|
||
gdb_call_async_signal_handler (sigint_remote_token, 1);
|
||
}
|
||
|
||
/* The user typed ^C twice. */
|
||
|
||
static void
|
||
remote_interrupt_twice (int signo)
|
||
{
|
||
signal (signo, ofunc);
|
||
gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
|
||
signal (signo, remote_interrupt);
|
||
}
|
||
|
||
/* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
|
||
thread, all threads of a remote process, or all threads of all
|
||
processes. */
|
||
|
||
static void
|
||
remote_stop_ns (ptid_t ptid)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
char *endp = rs->buf + get_remote_packet_size ();
|
||
|
||
if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
|
||
remote_vcont_probe (rs);
|
||
|
||
if (!rs->support_vCont_t)
|
||
error (_("Remote server does not support stopping threads"));
|
||
|
||
if (ptid_equal (ptid, minus_one_ptid)
|
||
|| (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
|
||
p += xsnprintf (p, endp - p, "vCont;t");
|
||
else
|
||
{
|
||
ptid_t nptid;
|
||
|
||
p += xsnprintf (p, endp - p, "vCont;t:");
|
||
|
||
if (ptid_is_pid (ptid))
|
||
/* All (-1) threads of process. */
|
||
nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
|
||
else
|
||
{
|
||
/* Small optimization: if we already have a stop reply for
|
||
this thread, no use in telling the stub we want this
|
||
stopped. */
|
||
if (peek_stop_reply (ptid))
|
||
return;
|
||
|
||
nptid = ptid;
|
||
}
|
||
|
||
p = write_ptid (p, endp, nptid);
|
||
}
|
||
|
||
/* In non-stop, we get an immediate OK reply. The stop reply will
|
||
come in asynchronously by notification. */
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (strcmp (rs->buf, "OK") != 0)
|
||
error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
|
||
}
|
||
|
||
/* All-stop version of target_stop. Sends a break or a ^C to stop the
|
||
remote target. It is undefined which thread of which process
|
||
reports the stop. */
|
||
|
||
static void
|
||
remote_stop_as (ptid_t ptid)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
/* If the inferior is stopped already, but the core didn't know
|
||
about it yet, just ignore the request. The cached wait status
|
||
will be collected in remote_wait. */
|
||
if (rs->cached_wait_status)
|
||
return;
|
||
|
||
/* Send a break or a ^C, depending on user preference. */
|
||
|
||
if (remote_break)
|
||
serial_send_break (remote_desc);
|
||
else
|
||
serial_write (remote_desc, "\003", 1);
|
||
}
|
||
|
||
/* This is the generic stop called via the target vector. When a target
|
||
interrupt is requested, either by the command line or the GUI, we
|
||
will eventually end up here. */
|
||
|
||
static void
|
||
remote_stop (ptid_t ptid)
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
|
||
|
||
if (non_stop)
|
||
remote_stop_ns (ptid);
|
||
else
|
||
remote_stop_as (ptid);
|
||
}
|
||
|
||
/* Ask the user what to do when an interrupt is received. */
|
||
|
||
static void
|
||
interrupt_query (void)
|
||
{
|
||
target_terminal_ours ();
|
||
|
||
if (target_can_async_p ())
|
||
{
|
||
signal (SIGINT, handle_sigint);
|
||
deprecated_throw_reason (RETURN_QUIT);
|
||
}
|
||
else
|
||
{
|
||
if (query (_("Interrupted while waiting for the program.\n\
|
||
Give up (and stop debugging it)? ")))
|
||
{
|
||
pop_target ();
|
||
deprecated_throw_reason (RETURN_QUIT);
|
||
}
|
||
}
|
||
|
||
target_terminal_inferior ();
|
||
}
|
||
|
||
/* Enable/disable target terminal ownership. Most targets can use
|
||
terminal groups to control terminal ownership. Remote targets are
|
||
different in that explicit transfer of ownership to/from GDB/target
|
||
is required. */
|
||
|
||
static void
|
||
remote_terminal_inferior (void)
|
||
{
|
||
if (!target_async_permitted)
|
||
/* Nothing to do. */
|
||
return;
|
||
|
||
/* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
|
||
idempotent. The event-loop GDB talking to an asynchronous target
|
||
with a synchronous command calls this function from both
|
||
event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
|
||
transfer the terminal to the target when it shouldn't this guard
|
||
can go away. */
|
||
if (!remote_async_terminal_ours_p)
|
||
return;
|
||
delete_file_handler (input_fd);
|
||
remote_async_terminal_ours_p = 0;
|
||
initialize_sigint_signal_handler ();
|
||
/* NOTE: At this point we could also register our selves as the
|
||
recipient of all input. Any characters typed could then be
|
||
passed on down to the target. */
|
||
}
|
||
|
||
static void
|
||
remote_terminal_ours (void)
|
||
{
|
||
if (!target_async_permitted)
|
||
/* Nothing to do. */
|
||
return;
|
||
|
||
/* See FIXME in remote_terminal_inferior. */
|
||
if (remote_async_terminal_ours_p)
|
||
return;
|
||
cleanup_sigint_signal_handler (NULL);
|
||
add_file_handler (input_fd, stdin_event_handler, 0);
|
||
remote_async_terminal_ours_p = 1;
|
||
}
|
||
|
||
void
|
||
remote_console_output (char *msg)
|
||
{
|
||
char *p;
|
||
|
||
for (p = msg; p[0] && p[1]; p += 2)
|
||
{
|
||
char tb[2];
|
||
char c = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
tb[0] = c;
|
||
tb[1] = 0;
|
||
fputs_unfiltered (tb, gdb_stdtarg);
|
||
}
|
||
gdb_flush (gdb_stdtarg);
|
||
}
|
||
|
||
typedef struct cached_reg
|
||
{
|
||
int num;
|
||
gdb_byte data[MAX_REGISTER_SIZE];
|
||
} cached_reg_t;
|
||
|
||
DEF_VEC_O(cached_reg_t);
|
||
|
||
struct stop_reply
|
||
{
|
||
struct stop_reply *next;
|
||
|
||
ptid_t ptid;
|
||
|
||
struct target_waitstatus ws;
|
||
|
||
VEC(cached_reg_t) *regcache;
|
||
|
||
int stopped_by_watchpoint_p;
|
||
CORE_ADDR watch_data_address;
|
||
|
||
int solibs_changed;
|
||
int replay_event;
|
||
};
|
||
|
||
/* The list of already fetched and acknowledged stop events. */
|
||
static struct stop_reply *stop_reply_queue;
|
||
|
||
static struct stop_reply *
|
||
stop_reply_xmalloc (void)
|
||
{
|
||
struct stop_reply *r = XMALLOC (struct stop_reply);
|
||
r->next = NULL;
|
||
return r;
|
||
}
|
||
|
||
static void
|
||
stop_reply_xfree (struct stop_reply *r)
|
||
{
|
||
if (r != NULL)
|
||
{
|
||
VEC_free (cached_reg_t, r->regcache);
|
||
xfree (r);
|
||
}
|
||
}
|
||
|
||
/* Discard all pending stop replies of inferior PID. If PID is -1,
|
||
discard everything. */
|
||
|
||
static void
|
||
discard_pending_stop_replies (int pid)
|
||
{
|
||
struct stop_reply *prev = NULL, *reply, *next;
|
||
|
||
/* Discard the in-flight notification. */
|
||
if (pending_stop_reply != NULL
|
||
&& (pid == -1
|
||
|| ptid_get_pid (pending_stop_reply->ptid) == pid))
|
||
{
|
||
stop_reply_xfree (pending_stop_reply);
|
||
pending_stop_reply = NULL;
|
||
}
|
||
|
||
/* Discard the stop replies we have already pulled with
|
||
vStopped. */
|
||
for (reply = stop_reply_queue; reply; reply = next)
|
||
{
|
||
next = reply->next;
|
||
if (pid == -1
|
||
|| ptid_get_pid (reply->ptid) == pid)
|
||
{
|
||
if (reply == stop_reply_queue)
|
||
stop_reply_queue = reply->next;
|
||
else
|
||
prev->next = reply->next;
|
||
|
||
stop_reply_xfree (reply);
|
||
}
|
||
else
|
||
prev = reply;
|
||
}
|
||
}
|
||
|
||
/* Cleanup wrapper. */
|
||
|
||
static void
|
||
do_stop_reply_xfree (void *arg)
|
||
{
|
||
struct stop_reply *r = arg;
|
||
stop_reply_xfree (r);
|
||
}
|
||
|
||
/* Look for a queued stop reply belonging to PTID. If one is found,
|
||
remove it from the queue, and return it. Returns NULL if none is
|
||
found. If there are still queued events left to process, tell the
|
||
event loop to get back to target_wait soon. */
|
||
|
||
static struct stop_reply *
|
||
queued_stop_reply (ptid_t ptid)
|
||
{
|
||
struct stop_reply *it, *prev;
|
||
struct stop_reply head;
|
||
|
||
head.next = stop_reply_queue;
|
||
prev = &head;
|
||
|
||
it = head.next;
|
||
|
||
if (!ptid_equal (ptid, minus_one_ptid))
|
||
for (; it; prev = it, it = it->next)
|
||
if (ptid_equal (ptid, it->ptid))
|
||
break;
|
||
|
||
if (it)
|
||
{
|
||
prev->next = it->next;
|
||
it->next = NULL;
|
||
}
|
||
|
||
stop_reply_queue = head.next;
|
||
|
||
if (stop_reply_queue)
|
||
/* There's still at least an event left. */
|
||
mark_async_event_handler (remote_async_inferior_event_token);
|
||
|
||
return it;
|
||
}
|
||
|
||
/* Push a fully parsed stop reply in the stop reply queue. Since we
|
||
know that we now have at least one queued event left to pass to the
|
||
core side, tell the event loop to get back to target_wait soon. */
|
||
|
||
static void
|
||
push_stop_reply (struct stop_reply *new_event)
|
||
{
|
||
struct stop_reply *event;
|
||
|
||
if (stop_reply_queue)
|
||
{
|
||
for (event = stop_reply_queue;
|
||
event && event->next;
|
||
event = event->next)
|
||
;
|
||
|
||
event->next = new_event;
|
||
}
|
||
else
|
||
stop_reply_queue = new_event;
|
||
|
||
mark_async_event_handler (remote_async_inferior_event_token);
|
||
}
|
||
|
||
/* Returns true if we have a stop reply for PTID. */
|
||
|
||
static int
|
||
peek_stop_reply (ptid_t ptid)
|
||
{
|
||
struct stop_reply *it;
|
||
|
||
for (it = stop_reply_queue; it; it = it->next)
|
||
if (ptid_equal (ptid, it->ptid))
|
||
{
|
||
if (it->ws.kind == TARGET_WAITKIND_STOPPED)
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Parse the stop reply in BUF. Either the function succeeds, and the
|
||
result is stored in EVENT, or throws an error. */
|
||
|
||
static void
|
||
remote_parse_stop_reply (char *buf, struct stop_reply *event)
|
||
{
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
ULONGEST addr;
|
||
char *p;
|
||
|
||
event->ptid = null_ptid;
|
||
event->ws.kind = TARGET_WAITKIND_IGNORE;
|
||
event->ws.value.integer = 0;
|
||
event->solibs_changed = 0;
|
||
event->replay_event = 0;
|
||
event->stopped_by_watchpoint_p = 0;
|
||
event->regcache = NULL;
|
||
|
||
switch (buf[0])
|
||
{
|
||
case 'T': /* Status with PC, SP, FP, ... */
|
||
/* Expedited reply, containing Signal, {regno, reg} repeat. */
|
||
/* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
|
||
ss = signal number
|
||
n... = register number
|
||
r... = register contents
|
||
*/
|
||
|
||
p = &buf[3]; /* after Txx */
|
||
while (*p)
|
||
{
|
||
char *p1;
|
||
char *p_temp;
|
||
int fieldsize;
|
||
LONGEST pnum = 0;
|
||
|
||
/* If the packet contains a register number, save it in
|
||
pnum and set p1 to point to the character following it.
|
||
Otherwise p1 points to p. */
|
||
|
||
/* If this packet is an awatch packet, don't parse the 'a'
|
||
as a register number. */
|
||
|
||
if (strncmp (p, "awatch", strlen("awatch")) != 0)
|
||
{
|
||
/* Read the ``P'' register number. */
|
||
pnum = strtol (p, &p_temp, 16);
|
||
p1 = p_temp;
|
||
}
|
||
else
|
||
p1 = p;
|
||
|
||
if (p1 == p) /* No register number present here. */
|
||
{
|
||
p1 = strchr (p, ':');
|
||
if (p1 == NULL)
|
||
error (_("Malformed packet(a) (missing colon): %s\n\
|
||
Packet: '%s'\n"),
|
||
p, buf);
|
||
if (strncmp (p, "thread", p1 - p) == 0)
|
||
event->ptid = read_ptid (++p1, &p);
|
||
else if ((strncmp (p, "watch", p1 - p) == 0)
|
||
|| (strncmp (p, "rwatch", p1 - p) == 0)
|
||
|| (strncmp (p, "awatch", p1 - p) == 0))
|
||
{
|
||
event->stopped_by_watchpoint_p = 1;
|
||
p = unpack_varlen_hex (++p1, &addr);
|
||
event->watch_data_address = (CORE_ADDR) addr;
|
||
}
|
||
else if (strncmp (p, "library", p1 - p) == 0)
|
||
{
|
||
p1++;
|
||
p_temp = p1;
|
||
while (*p_temp && *p_temp != ';')
|
||
p_temp++;
|
||
|
||
event->solibs_changed = 1;
|
||
p = p_temp;
|
||
}
|
||
else if (strncmp (p, "replaylog", p1 - p) == 0)
|
||
{
|
||
/* NO_HISTORY event.
|
||
p1 will indicate "begin" or "end", but
|
||
it makes no difference for now, so ignore it. */
|
||
event->replay_event = 1;
|
||
p_temp = strchr (p1 + 1, ';');
|
||
if (p_temp)
|
||
p = p_temp;
|
||
}
|
||
else
|
||
{
|
||
/* Silently skip unknown optional info. */
|
||
p_temp = strchr (p1 + 1, ';');
|
||
if (p_temp)
|
||
p = p_temp;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
|
||
cached_reg_t cached_reg;
|
||
|
||
p = p1;
|
||
|
||
if (*p != ':')
|
||
error (_("Malformed packet(b) (missing colon): %s\n\
|
||
Packet: '%s'\n"),
|
||
p, buf);
|
||
++p;
|
||
|
||
if (reg == NULL)
|
||
error (_("Remote sent bad register number %s: %s\n\
|
||
Packet: '%s'\n"),
|
||
phex_nz (pnum, 0), p, buf);
|
||
|
||
cached_reg.num = reg->regnum;
|
||
|
||
fieldsize = hex2bin (p, cached_reg.data,
|
||
register_size (target_gdbarch,
|
||
reg->regnum));
|
||
p += 2 * fieldsize;
|
||
if (fieldsize < register_size (target_gdbarch,
|
||
reg->regnum))
|
||
warning (_("Remote reply is too short: %s"), buf);
|
||
|
||
VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
|
||
}
|
||
|
||
if (*p != ';')
|
||
error (_("Remote register badly formatted: %s\nhere: %s"),
|
||
buf, p);
|
||
++p;
|
||
}
|
||
/* fall through */
|
||
case 'S': /* Old style status, just signal only. */
|
||
if (event->solibs_changed)
|
||
event->ws.kind = TARGET_WAITKIND_LOADED;
|
||
else if (event->replay_event)
|
||
event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
|
||
else
|
||
{
|
||
event->ws.kind = TARGET_WAITKIND_STOPPED;
|
||
event->ws.value.sig = (enum target_signal)
|
||
(((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
|
||
}
|
||
break;
|
||
case 'W': /* Target exited. */
|
||
case 'X':
|
||
{
|
||
char *p;
|
||
int pid;
|
||
ULONGEST value;
|
||
|
||
/* GDB used to accept only 2 hex chars here. Stubs should
|
||
only send more if they detect GDB supports multi-process
|
||
support. */
|
||
p = unpack_varlen_hex (&buf[1], &value);
|
||
|
||
if (buf[0] == 'W')
|
||
{
|
||
/* The remote process exited. */
|
||
event->ws.kind = TARGET_WAITKIND_EXITED;
|
||
event->ws.value.integer = value;
|
||
}
|
||
else
|
||
{
|
||
/* The remote process exited with a signal. */
|
||
event->ws.kind = TARGET_WAITKIND_SIGNALLED;
|
||
event->ws.value.sig = (enum target_signal) value;
|
||
}
|
||
|
||
/* If no process is specified, assume inferior_ptid. */
|
||
pid = ptid_get_pid (inferior_ptid);
|
||
if (*p == '\0')
|
||
;
|
||
else if (*p == ';')
|
||
{
|
||
p++;
|
||
|
||
if (p == '\0')
|
||
;
|
||
else if (strncmp (p,
|
||
"process:", sizeof ("process:") - 1) == 0)
|
||
{
|
||
ULONGEST upid;
|
||
p += sizeof ("process:") - 1;
|
||
unpack_varlen_hex (p, &upid);
|
||
pid = upid;
|
||
}
|
||
else
|
||
error (_("unknown stop reply packet: %s"), buf);
|
||
}
|
||
else
|
||
error (_("unknown stop reply packet: %s"), buf);
|
||
event->ptid = pid_to_ptid (pid);
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (non_stop && ptid_equal (event->ptid, null_ptid))
|
||
error (_("No process or thread specified in stop reply: %s"), buf);
|
||
}
|
||
|
||
/* When the stub wants to tell GDB about a new stop reply, it sends a
|
||
stop notification (%Stop). Those can come it at any time, hence,
|
||
we have to make sure that any pending putpkt/getpkt sequence we're
|
||
making is finished, before querying the stub for more events with
|
||
vStopped. E.g., if we started a vStopped sequence immediatelly
|
||
upon receiving the %Stop notification, something like this could
|
||
happen:
|
||
|
||
1.1) --> Hg 1
|
||
1.2) <-- OK
|
||
1.3) --> g
|
||
1.4) <-- %Stop
|
||
1.5) --> vStopped
|
||
1.6) <-- (registers reply to step #1.3)
|
||
|
||
Obviously, the reply in step #1.6 would be unexpected to a vStopped
|
||
query.
|
||
|
||
To solve this, whenever we parse a %Stop notification sucessfully,
|
||
we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
|
||
doing whatever we were doing:
|
||
|
||
2.1) --> Hg 1
|
||
2.2) <-- OK
|
||
2.3) --> g
|
||
2.4) <-- %Stop
|
||
<GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
|
||
2.5) <-- (registers reply to step #2.3)
|
||
|
||
Eventualy after step #2.5, we return to the event loop, which
|
||
notices there's an event on the
|
||
REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
|
||
associated callback --- the function below. At this point, we're
|
||
always safe to start a vStopped sequence. :
|
||
|
||
2.6) --> vStopped
|
||
2.7) <-- T05 thread:2
|
||
2.8) --> vStopped
|
||
2.9) --> OK
|
||
*/
|
||
|
||
static void
|
||
remote_get_pending_stop_replies (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (pending_stop_reply)
|
||
{
|
||
/* acknowledge */
|
||
putpkt ("vStopped");
|
||
|
||
/* Now we can rely on it. */
|
||
push_stop_reply (pending_stop_reply);
|
||
pending_stop_reply = NULL;
|
||
|
||
while (1)
|
||
{
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (strcmp (rs->buf, "OK") == 0)
|
||
break;
|
||
else
|
||
{
|
||
struct cleanup *old_chain;
|
||
struct stop_reply *stop_reply = stop_reply_xmalloc ();
|
||
|
||
old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
|
||
remote_parse_stop_reply (rs->buf, stop_reply);
|
||
|
||
/* acknowledge */
|
||
putpkt ("vStopped");
|
||
|
||
if (stop_reply->ws.kind != TARGET_WAITKIND_IGNORE)
|
||
{
|
||
/* Now we can rely on it. */
|
||
discard_cleanups (old_chain);
|
||
push_stop_reply (stop_reply);
|
||
}
|
||
else
|
||
/* We got an unknown stop reply. */
|
||
do_cleanups (old_chain);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Called when it is decided that STOP_REPLY holds the info of the
|
||
event that is to be returned to the core. This function always
|
||
destroys STOP_REPLY. */
|
||
|
||
static ptid_t
|
||
process_stop_reply (struct stop_reply *stop_reply,
|
||
struct target_waitstatus *status)
|
||
{
|
||
ptid_t ptid;
|
||
|
||
*status = stop_reply->ws;
|
||
ptid = stop_reply->ptid;
|
||
|
||
/* If no thread/process was reported by the stub, assume the current
|
||
inferior. */
|
||
if (ptid_equal (ptid, null_ptid))
|
||
ptid = inferior_ptid;
|
||
|
||
if (status->kind != TARGET_WAITKIND_EXITED
|
||
&& status->kind != TARGET_WAITKIND_SIGNALLED)
|
||
{
|
||
/* Expedited registers. */
|
||
if (stop_reply->regcache)
|
||
{
|
||
struct regcache *regcache
|
||
= get_thread_arch_regcache (ptid, target_gdbarch);
|
||
cached_reg_t *reg;
|
||
int ix;
|
||
|
||
for (ix = 0;
|
||
VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
|
||
ix++)
|
||
regcache_raw_supply (regcache, reg->num, reg->data);
|
||
VEC_free (cached_reg_t, stop_reply->regcache);
|
||
}
|
||
|
||
remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p;
|
||
remote_watch_data_address = stop_reply->watch_data_address;
|
||
|
||
remote_notice_new_inferior (ptid, 0);
|
||
}
|
||
|
||
stop_reply_xfree (stop_reply);
|
||
return ptid;
|
||
}
|
||
|
||
/* The non-stop mode version of target_wait. */
|
||
|
||
static ptid_t
|
||
remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
struct stop_reply *stop_reply;
|
||
int ret;
|
||
|
||
/* If in non-stop mode, get out of getpkt even if a
|
||
notification is received. */
|
||
|
||
ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
|
||
0 /* forever */);
|
||
while (1)
|
||
{
|
||
if (ret != -1)
|
||
switch (rs->buf[0])
|
||
{
|
||
case 'E': /* Error of some sort. */
|
||
/* We're out of sync with the target now. Did it continue
|
||
or not? We can't tell which thread it was in non-stop,
|
||
so just ignore this. */
|
||
warning (_("Remote failure reply: %s"), rs->buf);
|
||
break;
|
||
case 'O': /* Console output. */
|
||
remote_console_output (rs->buf + 1);
|
||
break;
|
||
default:
|
||
warning (_("Invalid remote reply: %s"), rs->buf);
|
||
break;
|
||
}
|
||
|
||
/* Acknowledge a pending stop reply that may have arrived in the
|
||
mean time. */
|
||
if (pending_stop_reply != NULL)
|
||
remote_get_pending_stop_replies ();
|
||
|
||
/* If indeed we noticed a stop reply, we're done. */
|
||
stop_reply = queued_stop_reply (ptid);
|
||
if (stop_reply != NULL)
|
||
return process_stop_reply (stop_reply, status);
|
||
|
||
/* Still no event. If we're just polling for an event, then
|
||
return to the event loop. */
|
||
if (options & TARGET_WNOHANG)
|
||
{
|
||
status->kind = TARGET_WAITKIND_IGNORE;
|
||
return minus_one_ptid;
|
||
}
|
||
|
||
/* Otherwise do a blocking wait. */
|
||
ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
|
||
1 /* forever */);
|
||
}
|
||
}
|
||
|
||
/* Wait until the remote machine stops, then return, storing status in
|
||
STATUS just as `wait' would. */
|
||
|
||
static ptid_t
|
||
remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
ptid_t event_ptid = null_ptid;
|
||
char *buf;
|
||
struct stop_reply *stop_reply;
|
||
|
||
again:
|
||
|
||
status->kind = TARGET_WAITKIND_IGNORE;
|
||
status->value.integer = 0;
|
||
|
||
stop_reply = queued_stop_reply (ptid);
|
||
if (stop_reply != NULL)
|
||
return process_stop_reply (stop_reply, status);
|
||
|
||
if (rs->cached_wait_status)
|
||
/* Use the cached wait status, but only once. */
|
||
rs->cached_wait_status = 0;
|
||
else
|
||
{
|
||
int ret;
|
||
|
||
if (!target_is_async_p ())
|
||
{
|
||
ofunc = signal (SIGINT, remote_interrupt);
|
||
/* If the user hit C-c before this packet, or between packets,
|
||
pretend that it was hit right here. */
|
||
if (quit_flag)
|
||
{
|
||
quit_flag = 0;
|
||
remote_interrupt (SIGINT);
|
||
}
|
||
}
|
||
|
||
/* FIXME: cagney/1999-09-27: If we're in async mode we should
|
||
_never_ wait for ever -> test on target_is_async_p().
|
||
However, before we do that we need to ensure that the caller
|
||
knows how to take the target into/out of async mode. */
|
||
ret = getpkt_sane (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
|
||
if (!target_is_async_p ())
|
||
signal (SIGINT, ofunc);
|
||
}
|
||
|
||
buf = rs->buf;
|
||
|
||
remote_stopped_by_watchpoint_p = 0;
|
||
|
||
/* We got something. */
|
||
rs->waiting_for_stop_reply = 0;
|
||
|
||
switch (buf[0])
|
||
{
|
||
case 'E': /* Error of some sort. */
|
||
/* We're out of sync with the target now. Did it continue or
|
||
not? Not is more likely, so report a stop. */
|
||
warning (_("Remote failure reply: %s"), buf);
|
||
status->kind = TARGET_WAITKIND_STOPPED;
|
||
status->value.sig = TARGET_SIGNAL_0;
|
||
break;
|
||
case 'F': /* File-I/O request. */
|
||
remote_fileio_request (buf);
|
||
break;
|
||
case 'T': case 'S': case 'X': case 'W':
|
||
{
|
||
struct stop_reply *stop_reply;
|
||
struct cleanup *old_chain;
|
||
|
||
stop_reply = stop_reply_xmalloc ();
|
||
old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
|
||
remote_parse_stop_reply (buf, stop_reply);
|
||
discard_cleanups (old_chain);
|
||
event_ptid = process_stop_reply (stop_reply, status);
|
||
break;
|
||
}
|
||
case 'O': /* Console output. */
|
||
remote_console_output (buf + 1);
|
||
|
||
/* The target didn't really stop; keep waiting. */
|
||
rs->waiting_for_stop_reply = 1;
|
||
|
||
break;
|
||
case '\0':
|
||
if (last_sent_signal != TARGET_SIGNAL_0)
|
||
{
|
||
/* Zero length reply means that we tried 'S' or 'C' and the
|
||
remote system doesn't support it. */
|
||
target_terminal_ours_for_output ();
|
||
printf_filtered
|
||
("Can't send signals to this remote system. %s not sent.\n",
|
||
target_signal_to_name (last_sent_signal));
|
||
last_sent_signal = TARGET_SIGNAL_0;
|
||
target_terminal_inferior ();
|
||
|
||
strcpy ((char *) buf, last_sent_step ? "s" : "c");
|
||
putpkt ((char *) buf);
|
||
|
||
/* We just told the target to resume, so a stop reply is in
|
||
order. */
|
||
rs->waiting_for_stop_reply = 1;
|
||
break;
|
||
}
|
||
/* else fallthrough */
|
||
default:
|
||
warning (_("Invalid remote reply: %s"), buf);
|
||
/* Keep waiting. */
|
||
rs->waiting_for_stop_reply = 1;
|
||
break;
|
||
}
|
||
|
||
if (status->kind == TARGET_WAITKIND_IGNORE)
|
||
{
|
||
/* Nothing interesting happened. If we're doing a non-blocking
|
||
poll, we're done. Otherwise, go back to waiting. */
|
||
if (options & TARGET_WNOHANG)
|
||
return minus_one_ptid;
|
||
else
|
||
goto again;
|
||
}
|
||
else if (status->kind != TARGET_WAITKIND_EXITED
|
||
&& status->kind != TARGET_WAITKIND_SIGNALLED)
|
||
{
|
||
if (!ptid_equal (event_ptid, null_ptid))
|
||
record_currthread (event_ptid);
|
||
else
|
||
event_ptid = inferior_ptid;
|
||
}
|
||
else
|
||
/* A process exit. Invalidate our notion of current thread. */
|
||
record_currthread (minus_one_ptid);
|
||
|
||
return event_ptid;
|
||
}
|
||
|
||
/* Wait until the remote machine stops, then return, storing status in
|
||
STATUS just as `wait' would. */
|
||
|
||
static ptid_t
|
||
remote_wait (struct target_ops *ops,
|
||
ptid_t ptid, struct target_waitstatus *status, int options)
|
||
{
|
||
ptid_t event_ptid;
|
||
|
||
if (non_stop)
|
||
event_ptid = remote_wait_ns (ptid, status, options);
|
||
else
|
||
event_ptid = remote_wait_as (ptid, status, options);
|
||
|
||
if (target_can_async_p ())
|
||
{
|
||
/* If there are are events left in the queue tell the event loop
|
||
to return here. */
|
||
if (stop_reply_queue)
|
||
mark_async_event_handler (remote_async_inferior_event_token);
|
||
}
|
||
|
||
return event_ptid;
|
||
}
|
||
|
||
/* Fetch a single register using a 'p' packet. */
|
||
|
||
static int
|
||
fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *buf, *p;
|
||
char regp[MAX_REGISTER_SIZE];
|
||
int i;
|
||
|
||
if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
|
||
return 0;
|
||
|
||
if (reg->pnum == -1)
|
||
return 0;
|
||
|
||
p = rs->buf;
|
||
*p++ = 'p';
|
||
p += hexnumstr (p, reg->pnum);
|
||
*p++ = '\0';
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
buf = rs->buf;
|
||
|
||
switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
|
||
{
|
||
case PACKET_OK:
|
||
break;
|
||
case PACKET_UNKNOWN:
|
||
return 0;
|
||
case PACKET_ERROR:
|
||
error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
|
||
gdbarch_register_name (get_regcache_arch (regcache),
|
||
reg->regnum),
|
||
buf);
|
||
}
|
||
|
||
/* If this register is unfetchable, tell the regcache. */
|
||
if (buf[0] == 'x')
|
||
{
|
||
regcache_raw_supply (regcache, reg->regnum, NULL);
|
||
return 1;
|
||
}
|
||
|
||
/* Otherwise, parse and supply the value. */
|
||
p = buf;
|
||
i = 0;
|
||
while (p[0] != 0)
|
||
{
|
||
if (p[1] == 0)
|
||
error (_("fetch_register_using_p: early buf termination"));
|
||
|
||
regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
p += 2;
|
||
}
|
||
regcache_raw_supply (regcache, reg->regnum, regp);
|
||
return 1;
|
||
}
|
||
|
||
/* Fetch the registers included in the target's 'g' packet. */
|
||
|
||
static int
|
||
send_g_packet (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int buf_len;
|
||
|
||
sprintf (rs->buf, "g");
|
||
remote_send (&rs->buf, &rs->buf_size);
|
||
|
||
/* We can get out of synch in various cases. If the first character
|
||
in the buffer is not a hex character, assume that has happened
|
||
and try to fetch another packet to read. */
|
||
while ((rs->buf[0] < '0' || rs->buf[0] > '9')
|
||
&& (rs->buf[0] < 'A' || rs->buf[0] > 'F')
|
||
&& (rs->buf[0] < 'a' || rs->buf[0] > 'f')
|
||
&& rs->buf[0] != 'x') /* New: unavailable register value. */
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Bad register packet; fetching a new packet\n");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
}
|
||
|
||
buf_len = strlen (rs->buf);
|
||
|
||
/* Sanity check the received packet. */
|
||
if (buf_len % 2 != 0)
|
||
error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
|
||
|
||
return buf_len / 2;
|
||
}
|
||
|
||
static void
|
||
process_g_packet (struct regcache *regcache)
|
||
{
|
||
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
||
struct remote_state *rs = get_remote_state ();
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
int i, buf_len;
|
||
char *p;
|
||
char *regs;
|
||
|
||
buf_len = strlen (rs->buf);
|
||
|
||
/* Further sanity checks, with knowledge of the architecture. */
|
||
if (buf_len > 2 * rsa->sizeof_g_packet)
|
||
error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
|
||
|
||
/* Save the size of the packet sent to us by the target. It is used
|
||
as a heuristic when determining the max size of packets that the
|
||
target can safely receive. */
|
||
if (rsa->actual_register_packet_size == 0)
|
||
rsa->actual_register_packet_size = buf_len;
|
||
|
||
/* If this is smaller than we guessed the 'g' packet would be,
|
||
update our records. A 'g' reply that doesn't include a register's
|
||
value implies either that the register is not available, or that
|
||
the 'p' packet must be used. */
|
||
if (buf_len < 2 * rsa->sizeof_g_packet)
|
||
{
|
||
rsa->sizeof_g_packet = buf_len / 2;
|
||
|
||
for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
|
||
{
|
||
if (rsa->regs[i].pnum == -1)
|
||
continue;
|
||
|
||
if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
|
||
rsa->regs[i].in_g_packet = 0;
|
||
else
|
||
rsa->regs[i].in_g_packet = 1;
|
||
}
|
||
}
|
||
|
||
regs = alloca (rsa->sizeof_g_packet);
|
||
|
||
/* Unimplemented registers read as all bits zero. */
|
||
memset (regs, 0, rsa->sizeof_g_packet);
|
||
|
||
/* Reply describes registers byte by byte, each byte encoded as two
|
||
hex characters. Suck them all up, then supply them to the
|
||
register cacheing/storage mechanism. */
|
||
|
||
p = rs->buf;
|
||
for (i = 0; i < rsa->sizeof_g_packet; i++)
|
||
{
|
||
if (p[0] == 0 || p[1] == 0)
|
||
/* This shouldn't happen - we adjusted sizeof_g_packet above. */
|
||
internal_error (__FILE__, __LINE__,
|
||
"unexpected end of 'g' packet reply");
|
||
|
||
if (p[0] == 'x' && p[1] == 'x')
|
||
regs[i] = 0; /* 'x' */
|
||
else
|
||
regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
p += 2;
|
||
}
|
||
|
||
{
|
||
int i;
|
||
for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
|
||
{
|
||
struct packet_reg *r = &rsa->regs[i];
|
||
if (r->in_g_packet)
|
||
{
|
||
if (r->offset * 2 >= strlen (rs->buf))
|
||
/* This shouldn't happen - we adjusted in_g_packet above. */
|
||
internal_error (__FILE__, __LINE__,
|
||
"unexpected end of 'g' packet reply");
|
||
else if (rs->buf[r->offset * 2] == 'x')
|
||
{
|
||
gdb_assert (r->offset * 2 < strlen (rs->buf));
|
||
/* The register isn't available, mark it as such (at
|
||
the same time setting the value to zero). */
|
||
regcache_raw_supply (regcache, r->regnum, NULL);
|
||
}
|
||
else
|
||
regcache_raw_supply (regcache, r->regnum,
|
||
regs + r->offset);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
fetch_registers_using_g (struct regcache *regcache)
|
||
{
|
||
send_g_packet ();
|
||
process_g_packet (regcache);
|
||
}
|
||
|
||
static void
|
||
remote_fetch_registers (struct target_ops *ops,
|
||
struct regcache *regcache, int regnum)
|
||
{
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
int i;
|
||
|
||
set_general_thread (inferior_ptid);
|
||
|
||
if (regnum >= 0)
|
||
{
|
||
struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
|
||
gdb_assert (reg != NULL);
|
||
|
||
/* If this register might be in the 'g' packet, try that first -
|
||
we are likely to read more than one register. If this is the
|
||
first 'g' packet, we might be overly optimistic about its
|
||
contents, so fall back to 'p'. */
|
||
if (reg->in_g_packet)
|
||
{
|
||
fetch_registers_using_g (regcache);
|
||
if (reg->in_g_packet)
|
||
return;
|
||
}
|
||
|
||
if (fetch_register_using_p (regcache, reg))
|
||
return;
|
||
|
||
/* This register is not available. */
|
||
regcache_raw_supply (regcache, reg->regnum, NULL);
|
||
|
||
return;
|
||
}
|
||
|
||
fetch_registers_using_g (regcache);
|
||
|
||
for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
|
||
if (!rsa->regs[i].in_g_packet)
|
||
if (!fetch_register_using_p (regcache, &rsa->regs[i]))
|
||
{
|
||
/* This register is not available. */
|
||
regcache_raw_supply (regcache, i, NULL);
|
||
}
|
||
}
|
||
|
||
/* Prepare to store registers. Since we may send them all (using a
|
||
'G' request), we have to read out the ones we don't want to change
|
||
first. */
|
||
|
||
static void
|
||
remote_prepare_to_store (struct regcache *regcache)
|
||
{
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
int i;
|
||
gdb_byte buf[MAX_REGISTER_SIZE];
|
||
|
||
/* Make sure the entire registers array is valid. */
|
||
switch (remote_protocol_packets[PACKET_P].support)
|
||
{
|
||
case PACKET_DISABLE:
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
/* Make sure all the necessary registers are cached. */
|
||
for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
|
||
if (rsa->regs[i].in_g_packet)
|
||
regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
|
||
break;
|
||
case PACKET_ENABLE:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
|
||
packet was not recognized. */
|
||
|
||
static int
|
||
store_register_using_P (const struct regcache *regcache,
|
||
struct packet_reg *reg)
|
||
{
|
||
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
||
struct remote_state *rs = get_remote_state ();
|
||
/* Try storing a single register. */
|
||
char *buf = rs->buf;
|
||
gdb_byte regp[MAX_REGISTER_SIZE];
|
||
char *p;
|
||
|
||
if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
|
||
return 0;
|
||
|
||
if (reg->pnum == -1)
|
||
return 0;
|
||
|
||
xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
|
||
p = buf + strlen (buf);
|
||
regcache_raw_collect (regcache, reg->regnum, regp);
|
||
bin2hex (regp, p, register_size (gdbarch, reg->regnum));
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
|
||
{
|
||
case PACKET_OK:
|
||
return 1;
|
||
case PACKET_ERROR:
|
||
error (_("Could not write register \"%s\"; remote failure reply '%s'"),
|
||
gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
|
||
case PACKET_UNKNOWN:
|
||
return 0;
|
||
default:
|
||
internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
|
||
}
|
||
}
|
||
|
||
/* Store register REGNUM, or all registers if REGNUM == -1, from the
|
||
contents of the register cache buffer. FIXME: ignores errors. */
|
||
|
||
static void
|
||
store_registers_using_G (const struct regcache *regcache)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
gdb_byte *regs;
|
||
char *p;
|
||
|
||
/* Extract all the registers in the regcache copying them into a
|
||
local buffer. */
|
||
{
|
||
int i;
|
||
regs = alloca (rsa->sizeof_g_packet);
|
||
memset (regs, 0, rsa->sizeof_g_packet);
|
||
for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
|
||
{
|
||
struct packet_reg *r = &rsa->regs[i];
|
||
if (r->in_g_packet)
|
||
regcache_raw_collect (regcache, r->regnum, regs + r->offset);
|
||
}
|
||
}
|
||
|
||
/* Command describes registers byte by byte,
|
||
each byte encoded as two hex characters. */
|
||
p = rs->buf;
|
||
*p++ = 'G';
|
||
/* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
|
||
updated. */
|
||
bin2hex (regs, p, rsa->sizeof_g_packet);
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (packet_check_result (rs->buf) == PACKET_ERROR)
|
||
error (_("Could not write registers; remote failure reply '%s'"),
|
||
rs->buf);
|
||
}
|
||
|
||
/* Store register REGNUM, or all registers if REGNUM == -1, from the contents
|
||
of the register cache buffer. FIXME: ignores errors. */
|
||
|
||
static void
|
||
remote_store_registers (struct target_ops *ops,
|
||
struct regcache *regcache, int regnum)
|
||
{
|
||
struct remote_arch_state *rsa = get_remote_arch_state ();
|
||
int i;
|
||
|
||
set_general_thread (inferior_ptid);
|
||
|
||
if (regnum >= 0)
|
||
{
|
||
struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
|
||
gdb_assert (reg != NULL);
|
||
|
||
/* Always prefer to store registers using the 'P' packet if
|
||
possible; we often change only a small number of registers.
|
||
Sometimes we change a larger number; we'd need help from a
|
||
higher layer to know to use 'G'. */
|
||
if (store_register_using_P (regcache, reg))
|
||
return;
|
||
|
||
/* For now, don't complain if we have no way to write the
|
||
register. GDB loses track of unavailable registers too
|
||
easily. Some day, this may be an error. We don't have
|
||
any way to read the register, either... */
|
||
if (!reg->in_g_packet)
|
||
return;
|
||
|
||
store_registers_using_G (regcache);
|
||
return;
|
||
}
|
||
|
||
store_registers_using_G (regcache);
|
||
|
||
for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
|
||
if (!rsa->regs[i].in_g_packet)
|
||
if (!store_register_using_P (regcache, &rsa->regs[i]))
|
||
/* See above for why we do not issue an error here. */
|
||
continue;
|
||
}
|
||
|
||
|
||
/* Return the number of hex digits in num. */
|
||
|
||
static int
|
||
hexnumlen (ULONGEST num)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; num != 0; i++)
|
||
num >>= 4;
|
||
|
||
return max (i, 1);
|
||
}
|
||
|
||
/* Set BUF to the minimum number of hex digits representing NUM. */
|
||
|
||
static int
|
||
hexnumstr (char *buf, ULONGEST num)
|
||
{
|
||
int len = hexnumlen (num);
|
||
return hexnumnstr (buf, num, len);
|
||
}
|
||
|
||
|
||
/* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
|
||
|
||
static int
|
||
hexnumnstr (char *buf, ULONGEST num, int width)
|
||
{
|
||
int i;
|
||
|
||
buf[width] = '\0';
|
||
|
||
for (i = width - 1; i >= 0; i--)
|
||
{
|
||
buf[i] = "0123456789abcdef"[(num & 0xf)];
|
||
num >>= 4;
|
||
}
|
||
|
||
return width;
|
||
}
|
||
|
||
/* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
|
||
|
||
static CORE_ADDR
|
||
remote_address_masked (CORE_ADDR addr)
|
||
{
|
||
int address_size = remote_address_size;
|
||
/* If "remoteaddresssize" was not set, default to target address size. */
|
||
if (!address_size)
|
||
address_size = gdbarch_addr_bit (target_gdbarch);
|
||
|
||
if (address_size > 0
|
||
&& address_size < (sizeof (ULONGEST) * 8))
|
||
{
|
||
/* Only create a mask when that mask can safely be constructed
|
||
in a ULONGEST variable. */
|
||
ULONGEST mask = 1;
|
||
mask = (mask << address_size) - 1;
|
||
addr &= mask;
|
||
}
|
||
return addr;
|
||
}
|
||
|
||
/* Convert BUFFER, binary data at least LEN bytes long, into escaped
|
||
binary data in OUT_BUF. Set *OUT_LEN to the length of the data
|
||
encoded in OUT_BUF, and return the number of bytes in OUT_BUF
|
||
(which may be more than *OUT_LEN due to escape characters). The
|
||
total number of bytes in the output buffer will be at most
|
||
OUT_MAXLEN. */
|
||
|
||
static int
|
||
remote_escape_output (const gdb_byte *buffer, int len,
|
||
gdb_byte *out_buf, int *out_len,
|
||
int out_maxlen)
|
||
{
|
||
int input_index, output_index;
|
||
|
||
output_index = 0;
|
||
for (input_index = 0; input_index < len; input_index++)
|
||
{
|
||
gdb_byte b = buffer[input_index];
|
||
|
||
if (b == '$' || b == '#' || b == '}')
|
||
{
|
||
/* These must be escaped. */
|
||
if (output_index + 2 > out_maxlen)
|
||
break;
|
||
out_buf[output_index++] = '}';
|
||
out_buf[output_index++] = b ^ 0x20;
|
||
}
|
||
else
|
||
{
|
||
if (output_index + 1 > out_maxlen)
|
||
break;
|
||
out_buf[output_index++] = b;
|
||
}
|
||
}
|
||
|
||
*out_len = input_index;
|
||
return output_index;
|
||
}
|
||
|
||
/* Convert BUFFER, escaped data LEN bytes long, into binary data
|
||
in OUT_BUF. Return the number of bytes written to OUT_BUF.
|
||
Raise an error if the total number of bytes exceeds OUT_MAXLEN.
|
||
|
||
This function reverses remote_escape_output. It allows more
|
||
escaped characters than that function does, in particular because
|
||
'*' must be escaped to avoid the run-length encoding processing
|
||
in reading packets. */
|
||
|
||
static int
|
||
remote_unescape_input (const gdb_byte *buffer, int len,
|
||
gdb_byte *out_buf, int out_maxlen)
|
||
{
|
||
int input_index, output_index;
|
||
int escaped;
|
||
|
||
output_index = 0;
|
||
escaped = 0;
|
||
for (input_index = 0; input_index < len; input_index++)
|
||
{
|
||
gdb_byte b = buffer[input_index];
|
||
|
||
if (output_index + 1 > out_maxlen)
|
||
{
|
||
warning (_("Received too much data from remote target;"
|
||
" ignoring overflow."));
|
||
return output_index;
|
||
}
|
||
|
||
if (escaped)
|
||
{
|
||
out_buf[output_index++] = b ^ 0x20;
|
||
escaped = 0;
|
||
}
|
||
else if (b == '}')
|
||
escaped = 1;
|
||
else
|
||
out_buf[output_index++] = b;
|
||
}
|
||
|
||
if (escaped)
|
||
error (_("Unmatched escape character in target response."));
|
||
|
||
return output_index;
|
||
}
|
||
|
||
/* Determine whether the remote target supports binary downloading.
|
||
This is accomplished by sending a no-op memory write of zero length
|
||
to the target at the specified address. It does not suffice to send
|
||
the whole packet, since many stubs strip the eighth bit and
|
||
subsequently compute a wrong checksum, which causes real havoc with
|
||
remote_write_bytes.
|
||
|
||
NOTE: This can still lose if the serial line is not eight-bit
|
||
clean. In cases like this, the user should clear "remote
|
||
X-packet". */
|
||
|
||
static void
|
||
check_binary_download (CORE_ADDR addr)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
switch (remote_protocol_packets[PACKET_X].support)
|
||
{
|
||
case PACKET_DISABLE:
|
||
break;
|
||
case PACKET_ENABLE:
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
{
|
||
char *p;
|
||
|
||
p = rs->buf;
|
||
*p++ = 'X';
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
*p++ = ',';
|
||
p += hexnumstr (p, (ULONGEST) 0);
|
||
*p++ = ':';
|
||
*p = '\0';
|
||
|
||
putpkt_binary (rs->buf, (int) (p - rs->buf));
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (rs->buf[0] == '\0')
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"binary downloading NOT suppported by target\n");
|
||
remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
|
||
}
|
||
else
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"binary downloading suppported by target\n");
|
||
remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Write memory data directly to the remote machine.
|
||
This does not inform the data cache; the data cache uses this.
|
||
HEADER is the starting part of the packet.
|
||
MEMADDR is the address in the remote memory space.
|
||
MYADDR is the address of the buffer in our space.
|
||
LEN is the number of bytes.
|
||
PACKET_FORMAT should be either 'X' or 'M', and indicates if we
|
||
should send data as binary ('X'), or hex-encoded ('M').
|
||
|
||
The function creates packet of the form
|
||
<HEADER><ADDRESS>,<LENGTH>:<DATA>
|
||
|
||
where encoding of <DATA> is termined by PACKET_FORMAT.
|
||
|
||
If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
|
||
are omitted.
|
||
|
||
Returns the number of bytes transferred, or 0 (setting errno) for
|
||
error. Only transfer a single packet. */
|
||
|
||
static int
|
||
remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
|
||
const gdb_byte *myaddr, int len,
|
||
char packet_format, int use_length)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p;
|
||
char *plen = NULL;
|
||
int plenlen = 0;
|
||
int todo;
|
||
int nr_bytes;
|
||
int payload_size;
|
||
int payload_length;
|
||
int header_length;
|
||
|
||
if (packet_format != 'X' && packet_format != 'M')
|
||
internal_error (__FILE__, __LINE__,
|
||
"remote_write_bytes_aux: bad packet format");
|
||
|
||
if (len <= 0)
|
||
return 0;
|
||
|
||
payload_size = get_memory_write_packet_size ();
|
||
|
||
/* The packet buffer will be large enough for the payload;
|
||
get_memory_packet_size ensures this. */
|
||
rs->buf[0] = '\0';
|
||
|
||
/* Compute the size of the actual payload by subtracting out the
|
||
packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
|
||
*/
|
||
payload_size -= strlen ("$,:#NN");
|
||
if (!use_length)
|
||
/* The comma won't be used. */
|
||
payload_size += 1;
|
||
header_length = strlen (header);
|
||
payload_size -= header_length;
|
||
payload_size -= hexnumlen (memaddr);
|
||
|
||
/* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
|
||
|
||
strcat (rs->buf, header);
|
||
p = rs->buf + strlen (header);
|
||
|
||
/* Compute a best guess of the number of bytes actually transfered. */
|
||
if (packet_format == 'X')
|
||
{
|
||
/* Best guess at number of bytes that will fit. */
|
||
todo = min (len, payload_size);
|
||
if (use_length)
|
||
payload_size -= hexnumlen (todo);
|
||
todo = min (todo, payload_size);
|
||
}
|
||
else
|
||
{
|
||
/* Num bytes that will fit. */
|
||
todo = min (len, payload_size / 2);
|
||
if (use_length)
|
||
payload_size -= hexnumlen (todo);
|
||
todo = min (todo, payload_size / 2);
|
||
}
|
||
|
||
if (todo <= 0)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("minumum packet size too small to write data"));
|
||
|
||
/* If we already need another packet, then try to align the end
|
||
of this packet to a useful boundary. */
|
||
if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
|
||
todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
|
||
|
||
/* Append "<memaddr>". */
|
||
memaddr = remote_address_masked (memaddr);
|
||
p += hexnumstr (p, (ULONGEST) memaddr);
|
||
|
||
if (use_length)
|
||
{
|
||
/* Append ",". */
|
||
*p++ = ',';
|
||
|
||
/* Append <len>. Retain the location/size of <len>. It may need to
|
||
be adjusted once the packet body has been created. */
|
||
plen = p;
|
||
plenlen = hexnumstr (p, (ULONGEST) todo);
|
||
p += plenlen;
|
||
}
|
||
|
||
/* Append ":". */
|
||
*p++ = ':';
|
||
*p = '\0';
|
||
|
||
/* Append the packet body. */
|
||
if (packet_format == 'X')
|
||
{
|
||
/* Binary mode. Send target system values byte by byte, in
|
||
increasing byte addresses. Only escape certain critical
|
||
characters. */
|
||
payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
|
||
payload_size);
|
||
|
||
/* If not all TODO bytes fit, then we'll need another packet. Make
|
||
a second try to keep the end of the packet aligned. Don't do
|
||
this if the packet is tiny. */
|
||
if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
|
||
{
|
||
int new_nr_bytes;
|
||
|
||
new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
|
||
- memaddr);
|
||
if (new_nr_bytes != nr_bytes)
|
||
payload_length = remote_escape_output (myaddr, new_nr_bytes,
|
||
p, &nr_bytes,
|
||
payload_size);
|
||
}
|
||
|
||
p += payload_length;
|
||
if (use_length && nr_bytes < todo)
|
||
{
|
||
/* Escape chars have filled up the buffer prematurely,
|
||
and we have actually sent fewer bytes than planned.
|
||
Fix-up the length field of the packet. Use the same
|
||
number of characters as before. */
|
||
plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
|
||
*plen = ':'; /* overwrite \0 from hexnumnstr() */
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Normal mode: Send target system values byte by byte, in
|
||
increasing byte addresses. Each byte is encoded as a two hex
|
||
value. */
|
||
nr_bytes = bin2hex (myaddr, p, todo);
|
||
p += 2 * nr_bytes;
|
||
}
|
||
|
||
putpkt_binary (rs->buf, (int) (p - rs->buf));
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (rs->buf[0] == 'E')
|
||
{
|
||
/* There is no correspondance between what the remote protocol
|
||
uses for errors and errno codes. We would like a cleaner way
|
||
of representing errors (big enough to include errno codes,
|
||
bfd_error codes, and others). But for now just return EIO. */
|
||
errno = EIO;
|
||
return 0;
|
||
}
|
||
|
||
/* Return NR_BYTES, not TODO, in case escape chars caused us to send
|
||
fewer bytes than we'd planned. */
|
||
return nr_bytes;
|
||
}
|
||
|
||
/* Write memory data directly to the remote machine.
|
||
This does not inform the data cache; the data cache uses this.
|
||
MEMADDR is the address in the remote memory space.
|
||
MYADDR is the address of the buffer in our space.
|
||
LEN is the number of bytes.
|
||
|
||
Returns number of bytes transferred, or 0 (setting errno) for
|
||
error. Only transfer a single packet. */
|
||
|
||
int
|
||
remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
|
||
{
|
||
char *packet_format = 0;
|
||
|
||
/* Check whether the target supports binary download. */
|
||
check_binary_download (memaddr);
|
||
|
||
switch (remote_protocol_packets[PACKET_X].support)
|
||
{
|
||
case PACKET_ENABLE:
|
||
packet_format = "X";
|
||
break;
|
||
case PACKET_DISABLE:
|
||
packet_format = "M";
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
internal_error (__FILE__, __LINE__,
|
||
_("remote_write_bytes: bad internal state"));
|
||
default:
|
||
internal_error (__FILE__, __LINE__, _("bad switch"));
|
||
}
|
||
|
||
return remote_write_bytes_aux (packet_format,
|
||
memaddr, myaddr, len, packet_format[0], 1);
|
||
}
|
||
|
||
/* Read memory data directly from the remote machine.
|
||
This does not use the data cache; the data cache uses this.
|
||
MEMADDR is the address in the remote memory space.
|
||
MYADDR is the address of the buffer in our space.
|
||
LEN is the number of bytes.
|
||
|
||
Returns number of bytes transferred, or 0 for error. */
|
||
|
||
/* NOTE: cagney/1999-10-18: This function (and its siblings in other
|
||
remote targets) shouldn't attempt to read the entire buffer.
|
||
Instead it should read a single packet worth of data and then
|
||
return the byte size of that packet to the caller. The caller (its
|
||
caller and its callers caller ;-) already contains code for
|
||
handling partial reads. */
|
||
|
||
int
|
||
remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int max_buf_size; /* Max size of packet output buffer. */
|
||
int origlen;
|
||
|
||
if (len <= 0)
|
||
return 0;
|
||
|
||
max_buf_size = get_memory_read_packet_size ();
|
||
/* The packet buffer will be large enough for the payload;
|
||
get_memory_packet_size ensures this. */
|
||
|
||
origlen = len;
|
||
while (len > 0)
|
||
{
|
||
char *p;
|
||
int todo;
|
||
int i;
|
||
|
||
todo = min (len, max_buf_size / 2); /* num bytes that will fit */
|
||
|
||
/* construct "m"<memaddr>","<len>" */
|
||
/* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
|
||
memaddr = remote_address_masked (memaddr);
|
||
p = rs->buf;
|
||
*p++ = 'm';
|
||
p += hexnumstr (p, (ULONGEST) memaddr);
|
||
*p++ = ',';
|
||
p += hexnumstr (p, (ULONGEST) todo);
|
||
*p = '\0';
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (rs->buf[0] == 'E'
|
||
&& isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
|
||
&& rs->buf[3] == '\0')
|
||
{
|
||
/* There is no correspondance between what the remote
|
||
protocol uses for errors and errno codes. We would like
|
||
a cleaner way of representing errors (big enough to
|
||
include errno codes, bfd_error codes, and others). But
|
||
for now just return EIO. */
|
||
errno = EIO;
|
||
return 0;
|
||
}
|
||
|
||
/* Reply describes memory byte by byte,
|
||
each byte encoded as two hex characters. */
|
||
|
||
p = rs->buf;
|
||
if ((i = hex2bin (p, myaddr, todo)) < todo)
|
||
{
|
||
/* Reply is short. This means that we were able to read
|
||
only part of what we wanted to. */
|
||
return i + (origlen - len);
|
||
}
|
||
myaddr += todo;
|
||
memaddr += todo;
|
||
len -= todo;
|
||
}
|
||
return origlen;
|
||
}
|
||
|
||
|
||
/* Remote notification handler. */
|
||
|
||
static void
|
||
handle_notification (char *buf, size_t length)
|
||
{
|
||
if (strncmp (buf, "Stop:", 5) == 0)
|
||
{
|
||
if (pending_stop_reply)
|
||
/* We've already parsed the in-flight stop-reply, but the stub
|
||
for some reason thought we didn't, possibly due to timeout
|
||
on its side. Just ignore it. */
|
||
;
|
||
else
|
||
{
|
||
struct cleanup *old_chain;
|
||
struct stop_reply *reply = stop_reply_xmalloc ();
|
||
old_chain = make_cleanup (do_stop_reply_xfree, reply);
|
||
|
||
remote_parse_stop_reply (buf + 5, reply);
|
||
|
||
discard_cleanups (old_chain);
|
||
|
||
/* Be careful to only set it after parsing, since an error
|
||
may be thrown then. */
|
||
pending_stop_reply = reply;
|
||
|
||
/* Notify the event loop there's a stop reply to acknowledge
|
||
and that there may be more events to fetch. */
|
||
mark_async_event_handler (remote_async_get_pending_events_token);
|
||
}
|
||
}
|
||
else
|
||
/* We ignore notifications we don't recognize, for compatibility
|
||
with newer stubs. */
|
||
;
|
||
}
|
||
|
||
|
||
/* Read or write LEN bytes from inferior memory at MEMADDR,
|
||
transferring to or from debugger address BUFFER. Write to inferior
|
||
if SHOULD_WRITE is nonzero. Returns length of data written or
|
||
read; 0 for error. TARGET is unused. */
|
||
|
||
static int
|
||
remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
|
||
int should_write, struct mem_attrib *attrib,
|
||
struct target_ops *target)
|
||
{
|
||
int res;
|
||
|
||
set_general_thread (inferior_ptid);
|
||
|
||
if (should_write)
|
||
res = remote_write_bytes (mem_addr, buffer, mem_len);
|
||
else
|
||
res = remote_read_bytes (mem_addr, buffer, mem_len);
|
||
|
||
return res;
|
||
}
|
||
|
||
/* Sends a packet with content determined by the printf format string
|
||
FORMAT and the remaining arguments, then gets the reply. Returns
|
||
whether the packet was a success, a failure, or unknown. */
|
||
|
||
static enum packet_result
|
||
remote_send_printf (const char *format, ...)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int max_size = get_remote_packet_size ();
|
||
|
||
va_list ap;
|
||
va_start (ap, format);
|
||
|
||
rs->buf[0] = '\0';
|
||
if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
|
||
internal_error (__FILE__, __LINE__, "Too long remote packet.");
|
||
|
||
if (putpkt (rs->buf) < 0)
|
||
error (_("Communication problem with target."));
|
||
|
||
rs->buf[0] = '\0';
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
return packet_check_result (rs->buf);
|
||
}
|
||
|
||
static void
|
||
restore_remote_timeout (void *p)
|
||
{
|
||
int value = *(int *)p;
|
||
remote_timeout = value;
|
||
}
|
||
|
||
/* Flash writing can take quite some time. We'll set
|
||
effectively infinite timeout for flash operations.
|
||
In future, we'll need to decide on a better approach. */
|
||
static const int remote_flash_timeout = 1000;
|
||
|
||
static void
|
||
remote_flash_erase (struct target_ops *ops,
|
||
ULONGEST address, LONGEST length)
|
||
{
|
||
int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
|
||
int saved_remote_timeout = remote_timeout;
|
||
enum packet_result ret;
|
||
|
||
struct cleanup *back_to = make_cleanup (restore_remote_timeout,
|
||
&saved_remote_timeout);
|
||
remote_timeout = remote_flash_timeout;
|
||
|
||
ret = remote_send_printf ("vFlashErase:%s,%s",
|
||
phex (address, addr_size),
|
||
phex (length, 4));
|
||
switch (ret)
|
||
{
|
||
case PACKET_UNKNOWN:
|
||
error (_("Remote target does not support flash erase"));
|
||
case PACKET_ERROR:
|
||
error (_("Error erasing flash with vFlashErase packet"));
|
||
default:
|
||
break;
|
||
}
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static LONGEST
|
||
remote_flash_write (struct target_ops *ops,
|
||
ULONGEST address, LONGEST length,
|
||
const gdb_byte *data)
|
||
{
|
||
int saved_remote_timeout = remote_timeout;
|
||
int ret;
|
||
struct cleanup *back_to = make_cleanup (restore_remote_timeout,
|
||
&saved_remote_timeout);
|
||
|
||
remote_timeout = remote_flash_timeout;
|
||
ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
|
||
do_cleanups (back_to);
|
||
|
||
return ret;
|
||
}
|
||
|
||
static void
|
||
remote_flash_done (struct target_ops *ops)
|
||
{
|
||
int saved_remote_timeout = remote_timeout;
|
||
int ret;
|
||
struct cleanup *back_to = make_cleanup (restore_remote_timeout,
|
||
&saved_remote_timeout);
|
||
|
||
remote_timeout = remote_flash_timeout;
|
||
ret = remote_send_printf ("vFlashDone");
|
||
do_cleanups (back_to);
|
||
|
||
switch (ret)
|
||
{
|
||
case PACKET_UNKNOWN:
|
||
error (_("Remote target does not support vFlashDone"));
|
||
case PACKET_ERROR:
|
||
error (_("Error finishing flash operation"));
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
remote_files_info (struct target_ops *ignore)
|
||
{
|
||
puts_filtered ("Debugging a target over a serial line.\n");
|
||
}
|
||
|
||
/* Stuff for dealing with the packets which are part of this protocol.
|
||
See comment at top of file for details. */
|
||
|
||
/* Read a single character from the remote end. */
|
||
|
||
static int
|
||
readchar (int timeout)
|
||
{
|
||
int ch;
|
||
|
||
ch = serial_readchar (remote_desc, timeout);
|
||
|
||
if (ch >= 0)
|
||
return ch;
|
||
|
||
switch ((enum serial_rc) ch)
|
||
{
|
||
case SERIAL_EOF:
|
||
pop_target ();
|
||
error (_("Remote connection closed"));
|
||
/* no return */
|
||
case SERIAL_ERROR:
|
||
perror_with_name (_("Remote communication error"));
|
||
/* no return */
|
||
case SERIAL_TIMEOUT:
|
||
break;
|
||
}
|
||
return ch;
|
||
}
|
||
|
||
/* Send the command in *BUF to the remote machine, and read the reply
|
||
into *BUF. Report an error if we get an error reply. Resize
|
||
*BUF using xrealloc if necessary to hold the result, and update
|
||
*SIZEOF_BUF. */
|
||
|
||
static void
|
||
remote_send (char **buf,
|
||
long *sizeof_buf)
|
||
{
|
||
putpkt (*buf);
|
||
getpkt (buf, sizeof_buf, 0);
|
||
|
||
if ((*buf)[0] == 'E')
|
||
error (_("Remote failure reply: %s"), *buf);
|
||
}
|
||
|
||
/* Return a pointer to an xmalloc'ed string representing an escaped
|
||
version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
|
||
etc. The caller is responsible for releasing the returned
|
||
memory. */
|
||
|
||
static char *
|
||
escape_buffer (const char *buf, int n)
|
||
{
|
||
struct cleanup *old_chain;
|
||
struct ui_file *stb;
|
||
char *str;
|
||
|
||
stb = mem_fileopen ();
|
||
old_chain = make_cleanup_ui_file_delete (stb);
|
||
|
||
fputstrn_unfiltered (buf, n, 0, stb);
|
||
str = ui_file_xstrdup (stb, NULL);
|
||
do_cleanups (old_chain);
|
||
return str;
|
||
}
|
||
|
||
/* Display a null-terminated packet on stdout, for debugging, using C
|
||
string notation. */
|
||
|
||
static void
|
||
print_packet (char *buf)
|
||
{
|
||
puts_filtered ("\"");
|
||
fputstr_filtered (buf, '"', gdb_stdout);
|
||
puts_filtered ("\"");
|
||
}
|
||
|
||
int
|
||
putpkt (char *buf)
|
||
{
|
||
return putpkt_binary (buf, strlen (buf));
|
||
}
|
||
|
||
/* Send a packet to the remote machine, with error checking. The data
|
||
of the packet is in BUF. The string in BUF can be at most
|
||
get_remote_packet_size () - 5 to account for the $, # and checksum,
|
||
and for a possible /0 if we are debugging (remote_debug) and want
|
||
to print the sent packet as a string. */
|
||
|
||
static int
|
||
putpkt_binary (char *buf, int cnt)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int i;
|
||
unsigned char csum = 0;
|
||
char *buf2 = alloca (cnt + 6);
|
||
|
||
int ch;
|
||
int tcount = 0;
|
||
char *p;
|
||
|
||
/* Catch cases like trying to read memory or listing threads while
|
||
we're waiting for a stop reply. The remote server wouldn't be
|
||
ready to handle this request, so we'd hang and timeout. We don't
|
||
have to worry about this in synchronous mode, because in that
|
||
case it's not possible to issue a command while the target is
|
||
running. This is not a problem in non-stop mode, because in that
|
||
case, the stub is always ready to process serial input. */
|
||
if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
|
||
error (_("Cannot execute this command while the target is running."));
|
||
|
||
/* We're sending out a new packet. Make sure we don't look at a
|
||
stale cached response. */
|
||
rs->cached_wait_status = 0;
|
||
|
||
/* Copy the packet into buffer BUF2, encapsulating it
|
||
and giving it a checksum. */
|
||
|
||
p = buf2;
|
||
*p++ = '$';
|
||
|
||
for (i = 0; i < cnt; i++)
|
||
{
|
||
csum += buf[i];
|
||
*p++ = buf[i];
|
||
}
|
||
*p++ = '#';
|
||
*p++ = tohex ((csum >> 4) & 0xf);
|
||
*p++ = tohex (csum & 0xf);
|
||
|
||
/* Send it over and over until we get a positive ack. */
|
||
|
||
while (1)
|
||
{
|
||
int started_error_output = 0;
|
||
|
||
if (remote_debug)
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *str;
|
||
|
||
*p = '\0';
|
||
str = escape_buffer (buf2, p - buf2);
|
||
old_chain = make_cleanup (xfree, str);
|
||
fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
|
||
gdb_flush (gdb_stdlog);
|
||
do_cleanups (old_chain);
|
||
}
|
||
if (serial_write (remote_desc, buf2, p - buf2))
|
||
perror_with_name (_("putpkt: write failed"));
|
||
|
||
/* If this is a no acks version of the remote protocol, send the
|
||
packet and move on. */
|
||
if (rs->noack_mode)
|
||
break;
|
||
|
||
/* Read until either a timeout occurs (-2) or '+' is read.
|
||
Handle any notification that arrives in the mean time. */
|
||
while (1)
|
||
{
|
||
ch = readchar (remote_timeout);
|
||
|
||
if (remote_debug)
|
||
{
|
||
switch (ch)
|
||
{
|
||
case '+':
|
||
case '-':
|
||
case SERIAL_TIMEOUT:
|
||
case '$':
|
||
case '%':
|
||
if (started_error_output)
|
||
{
|
||
putchar_unfiltered ('\n');
|
||
started_error_output = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
switch (ch)
|
||
{
|
||
case '+':
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "Ack\n");
|
||
return 1;
|
||
case '-':
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "Nak\n");
|
||
case SERIAL_TIMEOUT:
|
||
tcount++;
|
||
if (tcount > 3)
|
||
return 0;
|
||
break; /* Retransmit buffer. */
|
||
case '$':
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Packet instead of Ack, ignoring it\n");
|
||
/* It's probably an old response sent because an ACK
|
||
was lost. Gobble up the packet and ack it so it
|
||
doesn't get retransmitted when we resend this
|
||
packet. */
|
||
skip_frame ();
|
||
serial_write (remote_desc, "+", 1);
|
||
continue; /* Now, go look for +. */
|
||
}
|
||
|
||
case '%':
|
||
{
|
||
int val;
|
||
|
||
/* If we got a notification, handle it, and go back to looking
|
||
for an ack. */
|
||
/* We've found the start of a notification. Now
|
||
collect the data. */
|
||
val = read_frame (&rs->buf, &rs->buf_size);
|
||
if (val >= 0)
|
||
{
|
||
if (remote_debug)
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *str;
|
||
|
||
str = escape_buffer (rs->buf, val);
|
||
old_chain = make_cleanup (xfree, str);
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
" Notification received: %s\n",
|
||
str);
|
||
do_cleanups (old_chain);
|
||
}
|
||
handle_notification (rs->buf, val);
|
||
/* We're in sync now, rewait for the ack. */
|
||
tcount = 0;
|
||
}
|
||
else
|
||
{
|
||
if (remote_debug)
|
||
{
|
||
if (!started_error_output)
|
||
{
|
||
started_error_output = 1;
|
||
fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
|
||
}
|
||
fputc_unfiltered (ch & 0177, gdb_stdlog);
|
||
fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
|
||
}
|
||
}
|
||
continue;
|
||
}
|
||
/* fall-through */
|
||
default:
|
||
if (remote_debug)
|
||
{
|
||
if (!started_error_output)
|
||
{
|
||
started_error_output = 1;
|
||
fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
|
||
}
|
||
fputc_unfiltered (ch & 0177, gdb_stdlog);
|
||
}
|
||
continue;
|
||
}
|
||
break; /* Here to retransmit. */
|
||
}
|
||
|
||
#if 0
|
||
/* This is wrong. If doing a long backtrace, the user should be
|
||
able to get out next time we call QUIT, without anything as
|
||
violent as interrupt_query. If we want to provide a way out of
|
||
here without getting to the next QUIT, it should be based on
|
||
hitting ^C twice as in remote_wait. */
|
||
if (quit_flag)
|
||
{
|
||
quit_flag = 0;
|
||
interrupt_query ();
|
||
}
|
||
#endif
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Come here after finding the start of a frame when we expected an
|
||
ack. Do our best to discard the rest of this packet. */
|
||
|
||
static void
|
||
skip_frame (void)
|
||
{
|
||
int c;
|
||
|
||
while (1)
|
||
{
|
||
c = readchar (remote_timeout);
|
||
switch (c)
|
||
{
|
||
case SERIAL_TIMEOUT:
|
||
/* Nothing we can do. */
|
||
return;
|
||
case '#':
|
||
/* Discard the two bytes of checksum and stop. */
|
||
c = readchar (remote_timeout);
|
||
if (c >= 0)
|
||
c = readchar (remote_timeout);
|
||
|
||
return;
|
||
case '*': /* Run length encoding. */
|
||
/* Discard the repeat count. */
|
||
c = readchar (remote_timeout);
|
||
if (c < 0)
|
||
return;
|
||
break;
|
||
default:
|
||
/* A regular character. */
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Come here after finding the start of the frame. Collect the rest
|
||
into *BUF, verifying the checksum, length, and handling run-length
|
||
compression. NUL terminate the buffer. If there is not enough room,
|
||
expand *BUF using xrealloc.
|
||
|
||
Returns -1 on error, number of characters in buffer (ignoring the
|
||
trailing NULL) on success. (could be extended to return one of the
|
||
SERIAL status indications). */
|
||
|
||
static long
|
||
read_frame (char **buf_p,
|
||
long *sizeof_buf)
|
||
{
|
||
unsigned char csum;
|
||
long bc;
|
||
int c;
|
||
char *buf = *buf_p;
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
csum = 0;
|
||
bc = 0;
|
||
|
||
while (1)
|
||
{
|
||
c = readchar (remote_timeout);
|
||
switch (c)
|
||
{
|
||
case SERIAL_TIMEOUT:
|
||
if (remote_debug)
|
||
fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
|
||
return -1;
|
||
case '$':
|
||
if (remote_debug)
|
||
fputs_filtered ("Saw new packet start in middle of old one\n",
|
||
gdb_stdlog);
|
||
return -1; /* Start a new packet, count retries. */
|
||
case '#':
|
||
{
|
||
unsigned char pktcsum;
|
||
int check_0 = 0;
|
||
int check_1 = 0;
|
||
|
||
buf[bc] = '\0';
|
||
|
||
check_0 = readchar (remote_timeout);
|
||
if (check_0 >= 0)
|
||
check_1 = readchar (remote_timeout);
|
||
|
||
if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
|
||
{
|
||
if (remote_debug)
|
||
fputs_filtered ("Timeout in checksum, retrying\n",
|
||
gdb_stdlog);
|
||
return -1;
|
||
}
|
||
else if (check_0 < 0 || check_1 < 0)
|
||
{
|
||
if (remote_debug)
|
||
fputs_filtered ("Communication error in checksum\n",
|
||
gdb_stdlog);
|
||
return -1;
|
||
}
|
||
|
||
/* Don't recompute the checksum; with no ack packets we
|
||
don't have any way to indicate a packet retransmission
|
||
is necessary. */
|
||
if (rs->noack_mode)
|
||
return bc;
|
||
|
||
pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
|
||
if (csum == pktcsum)
|
||
return bc;
|
||
|
||
if (remote_debug)
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *str;
|
||
|
||
str = escape_buffer (buf, bc);
|
||
old_chain = make_cleanup (xfree, str);
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"\
|
||
Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
|
||
pktcsum, csum, str);
|
||
do_cleanups (old_chain);
|
||
}
|
||
/* Number of characters in buffer ignoring trailing
|
||
NULL. */
|
||
return -1;
|
||
}
|
||
case '*': /* Run length encoding. */
|
||
{
|
||
int repeat;
|
||
csum += c;
|
||
|
||
c = readchar (remote_timeout);
|
||
csum += c;
|
||
repeat = c - ' ' + 3; /* Compute repeat count. */
|
||
|
||
/* The character before ``*'' is repeated. */
|
||
|
||
if (repeat > 0 && repeat <= 255 && bc > 0)
|
||
{
|
||
if (bc + repeat - 1 >= *sizeof_buf - 1)
|
||
{
|
||
/* Make some more room in the buffer. */
|
||
*sizeof_buf += repeat;
|
||
*buf_p = xrealloc (*buf_p, *sizeof_buf);
|
||
buf = *buf_p;
|
||
}
|
||
|
||
memset (&buf[bc], buf[bc - 1], repeat);
|
||
bc += repeat;
|
||
continue;
|
||
}
|
||
|
||
buf[bc] = '\0';
|
||
printf_filtered (_("Invalid run length encoding: %s\n"), buf);
|
||
return -1;
|
||
}
|
||
default:
|
||
if (bc >= *sizeof_buf - 1)
|
||
{
|
||
/* Make some more room in the buffer. */
|
||
*sizeof_buf *= 2;
|
||
*buf_p = xrealloc (*buf_p, *sizeof_buf);
|
||
buf = *buf_p;
|
||
}
|
||
|
||
buf[bc++] = c;
|
||
csum += c;
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Read a packet from the remote machine, with error checking, and
|
||
store it in *BUF. Resize *BUF using xrealloc if necessary to hold
|
||
the result, and update *SIZEOF_BUF. If FOREVER, wait forever
|
||
rather than timing out; this is used (in synchronous mode) to wait
|
||
for a target that is is executing user code to stop. */
|
||
/* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
|
||
don't have to change all the calls to getpkt to deal with the
|
||
return value, because at the moment I don't know what the right
|
||
thing to do it for those. */
|
||
void
|
||
getpkt (char **buf,
|
||
long *sizeof_buf,
|
||
int forever)
|
||
{
|
||
int timed_out;
|
||
|
||
timed_out = getpkt_sane (buf, sizeof_buf, forever);
|
||
}
|
||
|
||
|
||
/* Read a packet from the remote machine, with error checking, and
|
||
store it in *BUF. Resize *BUF using xrealloc if necessary to hold
|
||
the result, and update *SIZEOF_BUF. If FOREVER, wait forever
|
||
rather than timing out; this is used (in synchronous mode) to wait
|
||
for a target that is is executing user code to stop. If FOREVER ==
|
||
0, this function is allowed to time out gracefully and return an
|
||
indication of this to the caller. Otherwise return the number of
|
||
bytes read. If EXPECTING_NOTIF, consider receiving a notification
|
||
enough reason to return to the caller. */
|
||
|
||
static int
|
||
getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
|
||
int expecting_notif)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int c;
|
||
int tries;
|
||
int timeout;
|
||
int val = -1;
|
||
|
||
/* We're reading a new response. Make sure we don't look at a
|
||
previously cached response. */
|
||
rs->cached_wait_status = 0;
|
||
|
||
strcpy (*buf, "timeout");
|
||
|
||
if (forever)
|
||
timeout = watchdog > 0 ? watchdog : -1;
|
||
else if (expecting_notif)
|
||
timeout = 0; /* There should already be a char in the buffer. If
|
||
not, bail out. */
|
||
else
|
||
timeout = remote_timeout;
|
||
|
||
#define MAX_TRIES 3
|
||
|
||
/* Process any number of notifications, and then return when
|
||
we get a packet. */
|
||
for (;;)
|
||
{
|
||
/* If we get a timeout or bad checksm, retry up to MAX_TRIES
|
||
times. */
|
||
for (tries = 1; tries <= MAX_TRIES; tries++)
|
||
{
|
||
/* This can loop forever if the remote side sends us
|
||
characters continuously, but if it pauses, we'll get
|
||
SERIAL_TIMEOUT from readchar because of timeout. Then
|
||
we'll count that as a retry.
|
||
|
||
Note that even when forever is set, we will only wait
|
||
forever prior to the start of a packet. After that, we
|
||
expect characters to arrive at a brisk pace. They should
|
||
show up within remote_timeout intervals. */
|
||
do
|
||
c = readchar (timeout);
|
||
while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
|
||
|
||
if (c == SERIAL_TIMEOUT)
|
||
{
|
||
if (expecting_notif)
|
||
return -1; /* Don't complain, it's normal to not get
|
||
anything in this case. */
|
||
|
||
if (forever) /* Watchdog went off? Kill the target. */
|
||
{
|
||
QUIT;
|
||
pop_target ();
|
||
error (_("Watchdog timeout has expired. Target detached."));
|
||
}
|
||
if (remote_debug)
|
||
fputs_filtered ("Timed out.\n", gdb_stdlog);
|
||
}
|
||
else
|
||
{
|
||
/* We've found the start of a packet or notification.
|
||
Now collect the data. */
|
||
val = read_frame (buf, sizeof_buf);
|
||
if (val >= 0)
|
||
break;
|
||
}
|
||
|
||
serial_write (remote_desc, "-", 1);
|
||
}
|
||
|
||
if (tries > MAX_TRIES)
|
||
{
|
||
/* We have tried hard enough, and just can't receive the
|
||
packet/notification. Give up. */
|
||
printf_unfiltered (_("Ignoring packet error, continuing...\n"));
|
||
|
||
/* Skip the ack char if we're in no-ack mode. */
|
||
if (!rs->noack_mode)
|
||
serial_write (remote_desc, "+", 1);
|
||
return -1;
|
||
}
|
||
|
||
/* If we got an ordinary packet, return that to our caller. */
|
||
if (c == '$')
|
||
{
|
||
if (remote_debug)
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *str;
|
||
|
||
str = escape_buffer (*buf, val);
|
||
old_chain = make_cleanup (xfree, str);
|
||
fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
/* Skip the ack char if we're in no-ack mode. */
|
||
if (!rs->noack_mode)
|
||
serial_write (remote_desc, "+", 1);
|
||
return val;
|
||
}
|
||
|
||
/* If we got a notification, handle it, and go back to looking
|
||
for a packet. */
|
||
else
|
||
{
|
||
gdb_assert (c == '%');
|
||
|
||
if (remote_debug)
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *str;
|
||
|
||
str = escape_buffer (*buf, val);
|
||
old_chain = make_cleanup (xfree, str);
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
" Notification received: %s\n",
|
||
str);
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
handle_notification (*buf, val);
|
||
|
||
/* Notifications require no acknowledgement. */
|
||
|
||
if (expecting_notif)
|
||
return -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
static int
|
||
getpkt_sane (char **buf, long *sizeof_buf, int forever)
|
||
{
|
||
return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0);
|
||
}
|
||
|
||
static int
|
||
getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever)
|
||
{
|
||
return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1);
|
||
}
|
||
|
||
|
||
static void
|
||
remote_kill (struct target_ops *ops)
|
||
{
|
||
/* Use catch_errors so the user can quit from gdb even when we
|
||
aren't on speaking terms with the remote system. */
|
||
catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
|
||
|
||
/* Don't wait for it to die. I'm not really sure it matters whether
|
||
we do or not. For the existing stubs, kill is a noop. */
|
||
target_mourn_inferior ();
|
||
}
|
||
|
||
static int
|
||
remote_vkill (int pid, struct remote_state *rs)
|
||
{
|
||
if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
/* Tell the remote target to detach. */
|
||
sprintf (rs->buf, "vKill;%x", pid);
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (packet_ok (rs->buf,
|
||
&remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
|
||
return 0;
|
||
else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
|
||
return -1;
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
static void
|
||
extended_remote_kill (struct target_ops *ops)
|
||
{
|
||
int res;
|
||
int pid = ptid_get_pid (inferior_ptid);
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
res = remote_vkill (pid, rs);
|
||
if (res == -1 && !remote_multi_process_p (rs))
|
||
{
|
||
/* Don't try 'k' on a multi-process aware stub -- it has no way
|
||
to specify the pid. */
|
||
|
||
putpkt ("k");
|
||
#if 0
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
|
||
res = 1;
|
||
#else
|
||
/* Don't wait for it to die. I'm not really sure it matters whether
|
||
we do or not. For the existing stubs, kill is a noop. */
|
||
res = 0;
|
||
#endif
|
||
}
|
||
|
||
if (res != 0)
|
||
error (_("Can't kill process"));
|
||
|
||
target_mourn_inferior ();
|
||
}
|
||
|
||
static void
|
||
remote_mourn (struct target_ops *ops)
|
||
{
|
||
remote_mourn_1 (ops);
|
||
}
|
||
|
||
/* Worker function for remote_mourn. */
|
||
static void
|
||
remote_mourn_1 (struct target_ops *target)
|
||
{
|
||
unpush_target (target);
|
||
|
||
/* remote_close takes care of doing most of the clean up. */
|
||
generic_mourn_inferior ();
|
||
}
|
||
|
||
static void
|
||
extended_remote_mourn_1 (struct target_ops *target)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
/* In case we got here due to an error, but we're going to stay
|
||
connected. */
|
||
rs->waiting_for_stop_reply = 0;
|
||
|
||
/* We're no longer interested in these events. */
|
||
discard_pending_stop_replies (ptid_get_pid (inferior_ptid));
|
||
|
||
/* If the current general thread belonged to the process we just
|
||
detached from or has exited, the remote side current general
|
||
thread becomes undefined. Considering a case like this:
|
||
|
||
- We just got here due to a detach.
|
||
- The process that we're detaching from happens to immediately
|
||
report a global breakpoint being hit in non-stop mode, in the
|
||
same thread we had selected before.
|
||
- GDB attaches to this process again.
|
||
- This event happens to be the next event we handle.
|
||
|
||
GDB would consider that the current general thread didn't need to
|
||
be set on the stub side (with Hg), since for all it knew,
|
||
GENERAL_THREAD hadn't changed.
|
||
|
||
Notice that although in all-stop mode, the remote server always
|
||
sets the current thread to the thread reporting the stop event,
|
||
that doesn't happen in non-stop mode; in non-stop, the stub *must
|
||
not* change the current thread when reporting a breakpoint hit,
|
||
due to the decoupling of event reporting and event handling.
|
||
|
||
To keep things simple, we always invalidate our notion of the
|
||
current thread. */
|
||
record_currthread (minus_one_ptid);
|
||
|
||
/* Unlike "target remote", we do not want to unpush the target; then
|
||
the next time the user says "run", we won't be connected. */
|
||
|
||
/* Call common code to mark the inferior as not running. */
|
||
generic_mourn_inferior ();
|
||
|
||
if (!have_inferiors ())
|
||
{
|
||
if (!remote_multi_process_p (rs))
|
||
{
|
||
/* Check whether the target is running now - some remote stubs
|
||
automatically restart after kill. */
|
||
putpkt ("?");
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
|
||
{
|
||
/* Assume that the target has been restarted. Set inferior_ptid
|
||
so that bits of core GDB realizes there's something here, e.g.,
|
||
so that the user can say "kill" again. */
|
||
inferior_ptid = magic_null_ptid;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
extended_remote_mourn (struct target_ops *ops)
|
||
{
|
||
extended_remote_mourn_1 (ops);
|
||
}
|
||
|
||
static int
|
||
extended_remote_run (char *args)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int len;
|
||
|
||
/* If the user has disabled vRun support, or we have detected that
|
||
support is not available, do not try it. */
|
||
if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
strcpy (rs->buf, "vRun;");
|
||
len = strlen (rs->buf);
|
||
|
||
if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
|
||
error (_("Remote file name too long for run packet"));
|
||
len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
|
||
|
||
gdb_assert (args != NULL);
|
||
if (*args)
|
||
{
|
||
struct cleanup *back_to;
|
||
int i;
|
||
char **argv;
|
||
|
||
argv = gdb_buildargv (args);
|
||
back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
|
||
for (i = 0; argv[i] != NULL; i++)
|
||
{
|
||
if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
|
||
error (_("Argument list too long for run packet"));
|
||
rs->buf[len++] = ';';
|
||
len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
|
||
}
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
rs->buf[len++] = '\0';
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
|
||
{
|
||
/* We have a wait response; we don't need it, though. All is well. */
|
||
return 0;
|
||
}
|
||
else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
|
||
/* It wasn't disabled before, but it is now. */
|
||
return -1;
|
||
else
|
||
{
|
||
if (remote_exec_file[0] == '\0')
|
||
error (_("Running the default executable on the remote target failed; "
|
||
"try \"set remote exec-file\"?"));
|
||
else
|
||
error (_("Running \"%s\" on the remote target failed"),
|
||
remote_exec_file);
|
||
}
|
||
}
|
||
|
||
/* In the extended protocol we want to be able to do things like
|
||
"run" and have them basically work as expected. So we need
|
||
a special create_inferior function. We support changing the
|
||
executable file and the command line arguments, but not the
|
||
environment. */
|
||
|
||
static void
|
||
extended_remote_create_inferior_1 (char *exec_file, char *args,
|
||
char **env, int from_tty)
|
||
{
|
||
/* If running asynchronously, register the target file descriptor
|
||
with the event loop. */
|
||
if (target_can_async_p ())
|
||
target_async (inferior_event_handler, 0);
|
||
|
||
/* Now restart the remote server. */
|
||
if (extended_remote_run (args) == -1)
|
||
{
|
||
/* vRun was not supported. Fail if we need it to do what the
|
||
user requested. */
|
||
if (remote_exec_file[0])
|
||
error (_("Remote target does not support \"set remote exec-file\""));
|
||
if (args[0])
|
||
error (_("Remote target does not support \"set args\" or run <ARGS>"));
|
||
|
||
/* Fall back to "R". */
|
||
extended_remote_restart ();
|
||
}
|
||
|
||
/* Clean up from the last time we ran, before we mark the target
|
||
running again. This will mark breakpoints uninserted, and
|
||
get_offsets may insert breakpoints. */
|
||
init_thread_list ();
|
||
init_wait_for_inferior ();
|
||
|
||
/* Now mark the inferior as running before we do anything else. */
|
||
inferior_ptid = magic_null_ptid;
|
||
|
||
/* Now, if we have thread information, update inferior_ptid. */
|
||
inferior_ptid = remote_current_thread (inferior_ptid);
|
||
|
||
remote_add_inferior (ptid_get_pid (inferior_ptid), 0);
|
||
add_thread_silent (inferior_ptid);
|
||
|
||
/* Get updated offsets, if the stub uses qOffsets. */
|
||
get_offsets ();
|
||
}
|
||
|
||
static void
|
||
extended_remote_create_inferior (struct target_ops *ops,
|
||
char *exec_file, char *args,
|
||
char **env, int from_tty)
|
||
{
|
||
extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
|
||
}
|
||
|
||
|
||
/* Insert a breakpoint. On targets that have software breakpoint
|
||
support, we ask the remote target to do the work; on targets
|
||
which don't, we insert a traditional memory breakpoint. */
|
||
|
||
static int
|
||
remote_insert_breakpoint (struct gdbarch *gdbarch,
|
||
struct bp_target_info *bp_tgt)
|
||
{
|
||
/* Try the "Z" s/w breakpoint packet if it is not already disabled.
|
||
If it succeeds, then set the support to PACKET_ENABLE. If it
|
||
fails, and the user has explicitly requested the Z support then
|
||
report an error, otherwise, mark it disabled and go on. */
|
||
|
||
if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
|
||
{
|
||
CORE_ADDR addr = bp_tgt->placed_address;
|
||
struct remote_state *rs;
|
||
char *p;
|
||
int bpsize;
|
||
|
||
gdbarch_breakpoint_from_pc (gdbarch, &addr, &bpsize);
|
||
|
||
rs = get_remote_state ();
|
||
p = rs->buf;
|
||
|
||
*(p++) = 'Z';
|
||
*(p++) = '0';
|
||
*(p++) = ',';
|
||
addr = (ULONGEST) remote_address_masked (addr);
|
||
p += hexnumstr (p, addr);
|
||
sprintf (p, ",%d", bpsize);
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
|
||
{
|
||
case PACKET_ERROR:
|
||
return -1;
|
||
case PACKET_OK:
|
||
bp_tgt->placed_address = addr;
|
||
bp_tgt->placed_size = bpsize;
|
||
return 0;
|
||
case PACKET_UNKNOWN:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return memory_insert_breakpoint (gdbarch, bp_tgt);
|
||
}
|
||
|
||
static int
|
||
remote_remove_breakpoint (struct gdbarch *gdbarch,
|
||
struct bp_target_info *bp_tgt)
|
||
{
|
||
CORE_ADDR addr = bp_tgt->placed_address;
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
|
||
{
|
||
char *p = rs->buf;
|
||
|
||
*(p++) = 'z';
|
||
*(p++) = '0';
|
||
*(p++) = ',';
|
||
|
||
addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
|
||
p += hexnumstr (p, addr);
|
||
sprintf (p, ",%d", bp_tgt->placed_size);
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
return (rs->buf[0] == 'E');
|
||
}
|
||
|
||
return memory_remove_breakpoint (gdbarch, bp_tgt);
|
||
}
|
||
|
||
static int
|
||
watchpoint_to_Z_packet (int type)
|
||
{
|
||
switch (type)
|
||
{
|
||
case hw_write:
|
||
return Z_PACKET_WRITE_WP;
|
||
break;
|
||
case hw_read:
|
||
return Z_PACKET_READ_WP;
|
||
break;
|
||
case hw_access:
|
||
return Z_PACKET_ACCESS_WP;
|
||
break;
|
||
default:
|
||
internal_error (__FILE__, __LINE__,
|
||
_("hw_bp_to_z: bad watchpoint type %d"), type);
|
||
}
|
||
}
|
||
|
||
static int
|
||
remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p;
|
||
enum Z_packet_type packet = watchpoint_to_Z_packet (type);
|
||
|
||
if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
sprintf (rs->buf, "Z%x,", packet);
|
||
p = strchr (rs->buf, '\0');
|
||
addr = remote_address_masked (addr);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", len);
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error (__FILE__, __LINE__,
|
||
_("remote_insert_watchpoint: reached end of function"));
|
||
}
|
||
|
||
|
||
static int
|
||
remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p;
|
||
enum Z_packet_type packet = watchpoint_to_Z_packet (type);
|
||
|
||
if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
sprintf (rs->buf, "z%x,", packet);
|
||
p = strchr (rs->buf, '\0');
|
||
addr = remote_address_masked (addr);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", len);
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error (__FILE__, __LINE__,
|
||
_("remote_remove_watchpoint: reached end of function"));
|
||
}
|
||
|
||
|
||
int remote_hw_watchpoint_limit = -1;
|
||
int remote_hw_breakpoint_limit = -1;
|
||
|
||
static int
|
||
remote_check_watch_resources (int type, int cnt, int ot)
|
||
{
|
||
if (type == bp_hardware_breakpoint)
|
||
{
|
||
if (remote_hw_breakpoint_limit == 0)
|
||
return 0;
|
||
else if (remote_hw_breakpoint_limit < 0)
|
||
return 1;
|
||
else if (cnt <= remote_hw_breakpoint_limit)
|
||
return 1;
|
||
}
|
||
else
|
||
{
|
||
if (remote_hw_watchpoint_limit == 0)
|
||
return 0;
|
||
else if (remote_hw_watchpoint_limit < 0)
|
||
return 1;
|
||
else if (ot)
|
||
return -1;
|
||
else if (cnt <= remote_hw_watchpoint_limit)
|
||
return 1;
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
static int
|
||
remote_stopped_by_watchpoint (void)
|
||
{
|
||
return remote_stopped_by_watchpoint_p;
|
||
}
|
||
|
||
static int
|
||
remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
|
||
{
|
||
int rc = 0;
|
||
if (remote_stopped_by_watchpoint ())
|
||
{
|
||
*addr_p = remote_watch_data_address;
|
||
rc = 1;
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
static int
|
||
remote_insert_hw_breakpoint (struct gdbarch *gdbarch,
|
||
struct bp_target_info *bp_tgt)
|
||
{
|
||
CORE_ADDR addr;
|
||
struct remote_state *rs;
|
||
char *p;
|
||
|
||
/* The length field should be set to the size of a breakpoint
|
||
instruction, even though we aren't inserting one ourselves. */
|
||
|
||
gdbarch_breakpoint_from_pc
|
||
(gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
|
||
|
||
if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
rs = get_remote_state ();
|
||
p = rs->buf;
|
||
|
||
*(p++) = 'Z';
|
||
*(p++) = '1';
|
||
*(p++) = ',';
|
||
|
||
addr = remote_address_masked (bp_tgt->placed_address);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", bp_tgt->placed_size);
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error (__FILE__, __LINE__,
|
||
_("remote_insert_hw_breakpoint: reached end of function"));
|
||
}
|
||
|
||
|
||
static int
|
||
remote_remove_hw_breakpoint (struct gdbarch *gdbarch,
|
||
struct bp_target_info *bp_tgt)
|
||
{
|
||
CORE_ADDR addr;
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
|
||
if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
*(p++) = 'z';
|
||
*(p++) = '1';
|
||
*(p++) = ',';
|
||
|
||
addr = remote_address_masked (bp_tgt->placed_address);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", bp_tgt->placed_size);
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
|
||
switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error (__FILE__, __LINE__,
|
||
_("remote_remove_hw_breakpoint: reached end of function"));
|
||
}
|
||
|
||
/* Table used by the crc32 function to calcuate the checksum. */
|
||
|
||
static unsigned long crc32_table[256] =
|
||
{0, 0};
|
||
|
||
static unsigned long
|
||
crc32 (unsigned char *buf, int len, unsigned int crc)
|
||
{
|
||
if (!crc32_table[1])
|
||
{
|
||
/* Initialize the CRC table and the decoding table. */
|
||
int i, j;
|
||
unsigned int c;
|
||
|
||
for (i = 0; i < 256; i++)
|
||
{
|
||
for (c = i << 24, j = 8; j > 0; --j)
|
||
c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
|
||
crc32_table[i] = c;
|
||
}
|
||
}
|
||
|
||
while (len--)
|
||
{
|
||
crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
|
||
buf++;
|
||
}
|
||
return crc;
|
||
}
|
||
|
||
/* compare-sections command
|
||
|
||
With no arguments, compares each loadable section in the exec bfd
|
||
with the same memory range on the target, and reports mismatches.
|
||
Useful for verifying the image on the target against the exec file.
|
||
Depends on the target understanding the new "qCRC:" request. */
|
||
|
||
/* FIXME: cagney/1999-10-26: This command should be broken down into a
|
||
target method (target verify memory) and generic version of the
|
||
actual command. This will allow other high-level code (especially
|
||
generic_load()) to make use of this target functionality. */
|
||
|
||
static void
|
||
compare_sections_command (char *args, int from_tty)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
asection *s;
|
||
unsigned long host_crc, target_crc;
|
||
struct cleanup *old_chain;
|
||
char *tmp;
|
||
char *sectdata;
|
||
const char *sectname;
|
||
bfd_size_type size;
|
||
bfd_vma lma;
|
||
int matched = 0;
|
||
int mismatched = 0;
|
||
|
||
if (!exec_bfd)
|
||
error (_("command cannot be used without an exec file"));
|
||
if (!current_target.to_shortname ||
|
||
strcmp (current_target.to_shortname, "remote") != 0)
|
||
error (_("command can only be used with remote target"));
|
||
|
||
for (s = exec_bfd->sections; s; s = s->next)
|
||
{
|
||
if (!(s->flags & SEC_LOAD))
|
||
continue; /* skip non-loadable section */
|
||
|
||
size = bfd_get_section_size (s);
|
||
if (size == 0)
|
||
continue; /* skip zero-length section */
|
||
|
||
sectname = bfd_get_section_name (exec_bfd, s);
|
||
if (args && strcmp (args, sectname) != 0)
|
||
continue; /* not the section selected by user */
|
||
|
||
matched = 1; /* do this section */
|
||
lma = s->lma;
|
||
/* FIXME: assumes lma can fit into long. */
|
||
xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
|
||
(long) lma, (long) size);
|
||
putpkt (rs->buf);
|
||
|
||
/* Be clever; compute the host_crc before waiting for target
|
||
reply. */
|
||
sectdata = xmalloc (size);
|
||
old_chain = make_cleanup (xfree, sectdata);
|
||
bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
|
||
host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
|
||
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
if (rs->buf[0] == 'E')
|
||
error (_("target memory fault, section %s, range %s -- %s"), sectname,
|
||
paddress (target_gdbarch, lma),
|
||
paddress (target_gdbarch, lma + size));
|
||
if (rs->buf[0] != 'C')
|
||
error (_("remote target does not support this operation"));
|
||
|
||
for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
|
||
target_crc = target_crc * 16 + fromhex (*tmp);
|
||
|
||
printf_filtered ("Section %s, range %s -- %s: ", sectname,
|
||
paddress (target_gdbarch, lma),
|
||
paddress (target_gdbarch, lma + size));
|
||
if (host_crc == target_crc)
|
||
printf_filtered ("matched.\n");
|
||
else
|
||
{
|
||
printf_filtered ("MIS-MATCHED!\n");
|
||
mismatched++;
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
if (mismatched > 0)
|
||
warning (_("One or more sections of the remote executable does not match\n\
|
||
the loaded file\n"));
|
||
if (args && !matched)
|
||
printf_filtered (_("No loaded section named '%s'.\n"), args);
|
||
}
|
||
|
||
/* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
|
||
into remote target. The number of bytes written to the remote
|
||
target is returned, or -1 for error. */
|
||
|
||
static LONGEST
|
||
remote_write_qxfer (struct target_ops *ops, const char *object_name,
|
||
const char *annex, const gdb_byte *writebuf,
|
||
ULONGEST offset, LONGEST len,
|
||
struct packet_config *packet)
|
||
{
|
||
int i, buf_len;
|
||
ULONGEST n;
|
||
struct remote_state *rs = get_remote_state ();
|
||
int max_size = get_memory_write_packet_size ();
|
||
|
||
if (packet->support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
/* Insert header. */
|
||
i = snprintf (rs->buf, max_size,
|
||
"qXfer:%s:write:%s:%s:",
|
||
object_name, annex ? annex : "",
|
||
phex_nz (offset, sizeof offset));
|
||
max_size -= (i + 1);
|
||
|
||
/* Escape as much data as fits into rs->buf. */
|
||
buf_len = remote_escape_output
|
||
(writebuf, len, (rs->buf + i), &max_size, max_size);
|
||
|
||
if (putpkt_binary (rs->buf, i + buf_len) < 0
|
||
|| getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
|
||
|| packet_ok (rs->buf, packet) != PACKET_OK)
|
||
return -1;
|
||
|
||
unpack_varlen_hex (rs->buf, &n);
|
||
return n;
|
||
}
|
||
|
||
/* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
|
||
Data at OFFSET, of up to LEN bytes, is read into READBUF; the
|
||
number of bytes read is returned, or 0 for EOF, or -1 for error.
|
||
The number of bytes read may be less than LEN without indicating an
|
||
EOF. PACKET is checked and updated to indicate whether the remote
|
||
target supports this object. */
|
||
|
||
static LONGEST
|
||
remote_read_qxfer (struct target_ops *ops, const char *object_name,
|
||
const char *annex,
|
||
gdb_byte *readbuf, ULONGEST offset, LONGEST len,
|
||
struct packet_config *packet)
|
||
{
|
||
static char *finished_object;
|
||
static char *finished_annex;
|
||
static ULONGEST finished_offset;
|
||
|
||
struct remote_state *rs = get_remote_state ();
|
||
LONGEST i, n, packet_len;
|
||
|
||
if (packet->support == PACKET_DISABLE)
|
||
return -1;
|
||
|
||
/* Check whether we've cached an end-of-object packet that matches
|
||
this request. */
|
||
if (finished_object)
|
||
{
|
||
if (strcmp (object_name, finished_object) == 0
|
||
&& strcmp (annex ? annex : "", finished_annex) == 0
|
||
&& offset == finished_offset)
|
||
return 0;
|
||
|
||
/* Otherwise, we're now reading something different. Discard
|
||
the cache. */
|
||
xfree (finished_object);
|
||
xfree (finished_annex);
|
||
finished_object = NULL;
|
||
finished_annex = NULL;
|
||
}
|
||
|
||
/* Request only enough to fit in a single packet. The actual data
|
||
may not, since we don't know how much of it will need to be escaped;
|
||
the target is free to respond with slightly less data. We subtract
|
||
five to account for the response type and the protocol frame. */
|
||
n = min (get_remote_packet_size () - 5, len);
|
||
snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
|
||
object_name, annex ? annex : "",
|
||
phex_nz (offset, sizeof offset),
|
||
phex_nz (n, sizeof n));
|
||
i = putpkt (rs->buf);
|
||
if (i < 0)
|
||
return -1;
|
||
|
||
rs->buf[0] = '\0';
|
||
packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
|
||
if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
|
||
return -1;
|
||
|
||
if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
|
||
error (_("Unknown remote qXfer reply: %s"), rs->buf);
|
||
|
||
/* 'm' means there is (or at least might be) more data after this
|
||
batch. That does not make sense unless there's at least one byte
|
||
of data in this reply. */
|
||
if (rs->buf[0] == 'm' && packet_len == 1)
|
||
error (_("Remote qXfer reply contained no data."));
|
||
|
||
/* Got some data. */
|
||
i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
|
||
|
||
/* 'l' is an EOF marker, possibly including a final block of data,
|
||
or possibly empty. If we have the final block of a non-empty
|
||
object, record this fact to bypass a subsequent partial read. */
|
||
if (rs->buf[0] == 'l' && offset + i > 0)
|
||
{
|
||
finished_object = xstrdup (object_name);
|
||
finished_annex = xstrdup (annex ? annex : "");
|
||
finished_offset = offset + i;
|
||
}
|
||
|
||
return i;
|
||
}
|
||
|
||
static LONGEST
|
||
remote_xfer_partial (struct target_ops *ops, enum target_object object,
|
||
const char *annex, gdb_byte *readbuf,
|
||
const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
|
||
{
|
||
struct remote_state *rs;
|
||
int i;
|
||
char *p2;
|
||
char query_type;
|
||
|
||
set_general_thread (inferior_ptid);
|
||
|
||
rs = get_remote_state ();
|
||
|
||
/* Handle memory using the standard memory routines. */
|
||
if (object == TARGET_OBJECT_MEMORY)
|
||
{
|
||
int xfered;
|
||
errno = 0;
|
||
|
||
/* If the remote target is connected but not running, we should
|
||
pass this request down to a lower stratum (e.g. the executable
|
||
file). */
|
||
if (!target_has_execution)
|
||
return 0;
|
||
|
||
if (writebuf != NULL)
|
||
xfered = remote_write_bytes (offset, writebuf, len);
|
||
else
|
||
xfered = remote_read_bytes (offset, readbuf, len);
|
||
|
||
if (xfered > 0)
|
||
return xfered;
|
||
else if (xfered == 0 && errno == 0)
|
||
return 0;
|
||
else
|
||
return -1;
|
||
}
|
||
|
||
/* Handle SPU memory using qxfer packets. */
|
||
if (object == TARGET_OBJECT_SPU)
|
||
{
|
||
if (readbuf)
|
||
return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
|
||
&remote_protocol_packets
|
||
[PACKET_qXfer_spu_read]);
|
||
else
|
||
return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
|
||
&remote_protocol_packets
|
||
[PACKET_qXfer_spu_write]);
|
||
}
|
||
|
||
/* Handle extra signal info using qxfer packets. */
|
||
if (object == TARGET_OBJECT_SIGNAL_INFO)
|
||
{
|
||
if (readbuf)
|
||
return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
|
||
&remote_protocol_packets
|
||
[PACKET_qXfer_siginfo_read]);
|
||
else
|
||
return remote_write_qxfer (ops, "siginfo", annex, writebuf, offset, len,
|
||
&remote_protocol_packets
|
||
[PACKET_qXfer_siginfo_write]);
|
||
}
|
||
|
||
/* Only handle flash writes. */
|
||
if (writebuf != NULL)
|
||
{
|
||
LONGEST xfered;
|
||
|
||
switch (object)
|
||
{
|
||
case TARGET_OBJECT_FLASH:
|
||
xfered = remote_flash_write (ops, offset, len, writebuf);
|
||
|
||
if (xfered > 0)
|
||
return xfered;
|
||
else if (xfered == 0 && errno == 0)
|
||
return 0;
|
||
else
|
||
return -1;
|
||
|
||
default:
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
/* Map pre-existing objects onto letters. DO NOT do this for new
|
||
objects!!! Instead specify new query packets. */
|
||
switch (object)
|
||
{
|
||
case TARGET_OBJECT_AVR:
|
||
query_type = 'R';
|
||
break;
|
||
|
||
case TARGET_OBJECT_AUXV:
|
||
gdb_assert (annex == NULL);
|
||
return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
|
||
&remote_protocol_packets[PACKET_qXfer_auxv]);
|
||
|
||
case TARGET_OBJECT_AVAILABLE_FEATURES:
|
||
return remote_read_qxfer
|
||
(ops, "features", annex, readbuf, offset, len,
|
||
&remote_protocol_packets[PACKET_qXfer_features]);
|
||
|
||
case TARGET_OBJECT_LIBRARIES:
|
||
return remote_read_qxfer
|
||
(ops, "libraries", annex, readbuf, offset, len,
|
||
&remote_protocol_packets[PACKET_qXfer_libraries]);
|
||
|
||
case TARGET_OBJECT_MEMORY_MAP:
|
||
gdb_assert (annex == NULL);
|
||
return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
|
||
&remote_protocol_packets[PACKET_qXfer_memory_map]);
|
||
|
||
case TARGET_OBJECT_OSDATA:
|
||
/* Should only get here if we're connected. */
|
||
gdb_assert (remote_desc);
|
||
return remote_read_qxfer
|
||
(ops, "osdata", annex, readbuf, offset, len,
|
||
&remote_protocol_packets[PACKET_qXfer_osdata]);
|
||
|
||
default:
|
||
return -1;
|
||
}
|
||
|
||
/* Note: a zero OFFSET and LEN can be used to query the minimum
|
||
buffer size. */
|
||
if (offset == 0 && len == 0)
|
||
return (get_remote_packet_size ());
|
||
/* Minimum outbuf size is get_remote_packet_size (). If LEN is not
|
||
large enough let the caller deal with it. */
|
||
if (len < get_remote_packet_size ())
|
||
return -1;
|
||
len = get_remote_packet_size ();
|
||
|
||
/* Except for querying the minimum buffer size, target must be open. */
|
||
if (!remote_desc)
|
||
error (_("remote query is only available after target open"));
|
||
|
||
gdb_assert (annex != NULL);
|
||
gdb_assert (readbuf != NULL);
|
||
|
||
p2 = rs->buf;
|
||
*p2++ = 'q';
|
||
*p2++ = query_type;
|
||
|
||
/* We used one buffer char for the remote protocol q command and
|
||
another for the query type. As the remote protocol encapsulation
|
||
uses 4 chars plus one extra in case we are debugging
|
||
(remote_debug), we have PBUFZIZ - 7 left to pack the query
|
||
string. */
|
||
i = 0;
|
||
while (annex[i] && (i < (get_remote_packet_size () - 8)))
|
||
{
|
||
/* Bad caller may have sent forbidden characters. */
|
||
gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
|
||
*p2++ = annex[i];
|
||
i++;
|
||
}
|
||
*p2 = '\0';
|
||
gdb_assert (annex[i] == '\0');
|
||
|
||
i = putpkt (rs->buf);
|
||
if (i < 0)
|
||
return i;
|
||
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
strcpy ((char *) readbuf, rs->buf);
|
||
|
||
return strlen ((char *) readbuf);
|
||
}
|
||
|
||
static int
|
||
remote_search_memory (struct target_ops* ops,
|
||
CORE_ADDR start_addr, ULONGEST search_space_len,
|
||
const gdb_byte *pattern, ULONGEST pattern_len,
|
||
CORE_ADDR *found_addrp)
|
||
{
|
||
int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
|
||
struct remote_state *rs = get_remote_state ();
|
||
int max_size = get_memory_write_packet_size ();
|
||
struct packet_config *packet =
|
||
&remote_protocol_packets[PACKET_qSearch_memory];
|
||
/* number of packet bytes used to encode the pattern,
|
||
this could be more than PATTERN_LEN due to escape characters */
|
||
int escaped_pattern_len;
|
||
/* amount of pattern that was encodable in the packet */
|
||
int used_pattern_len;
|
||
int i;
|
||
int found;
|
||
ULONGEST found_addr;
|
||
|
||
/* Don't go to the target if we don't have to.
|
||
This is done before checking packet->support to avoid the possibility that
|
||
a success for this edge case means the facility works in general. */
|
||
if (pattern_len > search_space_len)
|
||
return 0;
|
||
if (pattern_len == 0)
|
||
{
|
||
*found_addrp = start_addr;
|
||
return 1;
|
||
}
|
||
|
||
/* If we already know the packet isn't supported, fall back to the simple
|
||
way of searching memory. */
|
||
|
||
if (packet->support == PACKET_DISABLE)
|
||
{
|
||
/* Target doesn't provided special support, fall back and use the
|
||
standard support (copy memory and do the search here). */
|
||
return simple_search_memory (ops, start_addr, search_space_len,
|
||
pattern, pattern_len, found_addrp);
|
||
}
|
||
|
||
/* Insert header. */
|
||
i = snprintf (rs->buf, max_size,
|
||
"qSearch:memory:%s;%s;",
|
||
phex_nz (start_addr, addr_size),
|
||
phex_nz (search_space_len, sizeof (search_space_len)));
|
||
max_size -= (i + 1);
|
||
|
||
/* Escape as much data as fits into rs->buf. */
|
||
escaped_pattern_len =
|
||
remote_escape_output (pattern, pattern_len, (rs->buf + i),
|
||
&used_pattern_len, max_size);
|
||
|
||
/* Bail if the pattern is too large. */
|
||
if (used_pattern_len != pattern_len)
|
||
error ("Pattern is too large to transmit to remote target.");
|
||
|
||
if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
|
||
|| getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
|
||
|| packet_ok (rs->buf, packet) != PACKET_OK)
|
||
{
|
||
/* The request may not have worked because the command is not
|
||
supported. If so, fall back to the simple way. */
|
||
if (packet->support == PACKET_DISABLE)
|
||
{
|
||
return simple_search_memory (ops, start_addr, search_space_len,
|
||
pattern, pattern_len, found_addrp);
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
if (rs->buf[0] == '0')
|
||
found = 0;
|
||
else if (rs->buf[0] == '1')
|
||
{
|
||
found = 1;
|
||
if (rs->buf[1] != ',')
|
||
error (_("Unknown qSearch:memory reply: %s"), rs->buf);
|
||
unpack_varlen_hex (rs->buf + 2, &found_addr);
|
||
*found_addrp = found_addr;
|
||
}
|
||
else
|
||
error (_("Unknown qSearch:memory reply: %s"), rs->buf);
|
||
|
||
return found;
|
||
}
|
||
|
||
static void
|
||
remote_rcmd (char *command,
|
||
struct ui_file *outbuf)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
|
||
if (!remote_desc)
|
||
error (_("remote rcmd is only available after target open"));
|
||
|
||
/* Send a NULL command across as an empty command. */
|
||
if (command == NULL)
|
||
command = "";
|
||
|
||
/* The query prefix. */
|
||
strcpy (rs->buf, "qRcmd,");
|
||
p = strchr (rs->buf, '\0');
|
||
|
||
if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
|
||
error (_("\"monitor\" command ``%s'' is too long."), command);
|
||
|
||
/* Encode the actual command. */
|
||
bin2hex ((gdb_byte *) command, p, 0);
|
||
|
||
if (putpkt (rs->buf) < 0)
|
||
error (_("Communication problem with target."));
|
||
|
||
/* get/display the response */
|
||
while (1)
|
||
{
|
||
char *buf;
|
||
|
||
/* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
|
||
rs->buf[0] = '\0';
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
buf = rs->buf;
|
||
if (buf[0] == '\0')
|
||
error (_("Target does not support this command."));
|
||
if (buf[0] == 'O' && buf[1] != 'K')
|
||
{
|
||
remote_console_output (buf + 1); /* 'O' message from stub. */
|
||
continue;
|
||
}
|
||
if (strcmp (buf, "OK") == 0)
|
||
break;
|
||
if (strlen (buf) == 3 && buf[0] == 'E'
|
||
&& isdigit (buf[1]) && isdigit (buf[2]))
|
||
{
|
||
error (_("Protocol error with Rcmd"));
|
||
}
|
||
for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
|
||
{
|
||
char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
|
||
fputc_unfiltered (c, outbuf);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
static VEC(mem_region_s) *
|
||
remote_memory_map (struct target_ops *ops)
|
||
{
|
||
VEC(mem_region_s) *result = NULL;
|
||
char *text = target_read_stralloc (¤t_target,
|
||
TARGET_OBJECT_MEMORY_MAP, NULL);
|
||
|
||
if (text)
|
||
{
|
||
struct cleanup *back_to = make_cleanup (xfree, text);
|
||
result = parse_memory_map (text);
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
packet_command (char *args, int from_tty)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (!remote_desc)
|
||
error (_("command can only be used with remote target"));
|
||
|
||
if (!args)
|
||
error (_("remote-packet command requires packet text as argument"));
|
||
|
||
puts_filtered ("sending: ");
|
||
print_packet (args);
|
||
puts_filtered ("\n");
|
||
putpkt (args);
|
||
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
puts_filtered ("received: ");
|
||
print_packet (rs->buf);
|
||
puts_filtered ("\n");
|
||
}
|
||
|
||
#if 0
|
||
/* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
|
||
|
||
static void display_thread_info (struct gdb_ext_thread_info *info);
|
||
|
||
static void threadset_test_cmd (char *cmd, int tty);
|
||
|
||
static void threadalive_test (char *cmd, int tty);
|
||
|
||
static void threadlist_test_cmd (char *cmd, int tty);
|
||
|
||
int get_and_display_threadinfo (threadref *ref);
|
||
|
||
static void threadinfo_test_cmd (char *cmd, int tty);
|
||
|
||
static int thread_display_step (threadref *ref, void *context);
|
||
|
||
static void threadlist_update_test_cmd (char *cmd, int tty);
|
||
|
||
static void init_remote_threadtests (void);
|
||
|
||
#define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
|
||
|
||
static void
|
||
threadset_test_cmd (char *cmd, int tty)
|
||
{
|
||
int sample_thread = SAMPLE_THREAD;
|
||
|
||
printf_filtered (_("Remote threadset test\n"));
|
||
set_general_thread (sample_thread);
|
||
}
|
||
|
||
|
||
static void
|
||
threadalive_test (char *cmd, int tty)
|
||
{
|
||
int sample_thread = SAMPLE_THREAD;
|
||
int pid = ptid_get_pid (inferior_ptid);
|
||
ptid_t ptid = ptid_build (pid, 0, sample_thread);
|
||
|
||
if (remote_thread_alive (ptid))
|
||
printf_filtered ("PASS: Thread alive test\n");
|
||
else
|
||
printf_filtered ("FAIL: Thread alive test\n");
|
||
}
|
||
|
||
void output_threadid (char *title, threadref *ref);
|
||
|
||
void
|
||
output_threadid (char *title, threadref *ref)
|
||
{
|
||
char hexid[20];
|
||
|
||
pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
|
||
hexid[16] = 0;
|
||
printf_filtered ("%s %s\n", title, (&hexid[0]));
|
||
}
|
||
|
||
static void
|
||
threadlist_test_cmd (char *cmd, int tty)
|
||
{
|
||
int startflag = 1;
|
||
threadref nextthread;
|
||
int done, result_count;
|
||
threadref threadlist[3];
|
||
|
||
printf_filtered ("Remote Threadlist test\n");
|
||
if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
|
||
&result_count, &threadlist[0]))
|
||
printf_filtered ("FAIL: threadlist test\n");
|
||
else
|
||
{
|
||
threadref *scan = threadlist;
|
||
threadref *limit = scan + result_count;
|
||
|
||
while (scan < limit)
|
||
output_threadid (" thread ", scan++);
|
||
}
|
||
}
|
||
|
||
void
|
||
display_thread_info (struct gdb_ext_thread_info *info)
|
||
{
|
||
output_threadid ("Threadid: ", &info->threadid);
|
||
printf_filtered ("Name: %s\n ", info->shortname);
|
||
printf_filtered ("State: %s\n", info->display);
|
||
printf_filtered ("other: %s\n\n", info->more_display);
|
||
}
|
||
|
||
int
|
||
get_and_display_threadinfo (threadref *ref)
|
||
{
|
||
int result;
|
||
int set;
|
||
struct gdb_ext_thread_info threadinfo;
|
||
|
||
set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
|
||
| TAG_MOREDISPLAY | TAG_DISPLAY;
|
||
if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
|
||
display_thread_info (&threadinfo);
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
threadinfo_test_cmd (char *cmd, int tty)
|
||
{
|
||
int athread = SAMPLE_THREAD;
|
||
threadref thread;
|
||
int set;
|
||
|
||
int_to_threadref (&thread, athread);
|
||
printf_filtered ("Remote Threadinfo test\n");
|
||
if (!get_and_display_threadinfo (&thread))
|
||
printf_filtered ("FAIL cannot get thread info\n");
|
||
}
|
||
|
||
static int
|
||
thread_display_step (threadref *ref, void *context)
|
||
{
|
||
/* output_threadid(" threadstep ",ref); *//* simple test */
|
||
return get_and_display_threadinfo (ref);
|
||
}
|
||
|
||
static void
|
||
threadlist_update_test_cmd (char *cmd, int tty)
|
||
{
|
||
printf_filtered ("Remote Threadlist update test\n");
|
||
remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
|
||
}
|
||
|
||
static void
|
||
init_remote_threadtests (void)
|
||
{
|
||
add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
|
||
Fetch and print the remote list of thread identifiers, one pkt only"));
|
||
add_com ("tinfo", class_obscure, threadinfo_test_cmd,
|
||
_("Fetch and display info about one thread"));
|
||
add_com ("tset", class_obscure, threadset_test_cmd,
|
||
_("Test setting to a different thread"));
|
||
add_com ("tupd", class_obscure, threadlist_update_test_cmd,
|
||
_("Iterate through updating all remote thread info"));
|
||
add_com ("talive", class_obscure, threadalive_test,
|
||
_(" Remote thread alive test "));
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
/* Convert a thread ID to a string. Returns the string in a static
|
||
buffer. */
|
||
|
||
static char *
|
||
remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
|
||
{
|
||
static char buf[64];
|
||
struct remote_state *rs = get_remote_state ();
|
||
|
||
if (ptid_is_pid (ptid))
|
||
{
|
||
/* Printing an inferior target id. */
|
||
|
||
/* When multi-process extensions are off, there's no way in the
|
||
remote protocol to know the remote process id, if there's any
|
||
at all. There's one exception --- when we're connected with
|
||
target extended-remote, and we manually attached to a process
|
||
with "attach PID". We don't record anywhere a flag that
|
||
allows us to distinguish that case from the case of
|
||
connecting with extended-remote and the stub already being
|
||
attached to a process, and reporting yes to qAttached, hence
|
||
no smart special casing here. */
|
||
if (!remote_multi_process_p (rs))
|
||
{
|
||
xsnprintf (buf, sizeof buf, "Remote target");
|
||
return buf;
|
||
}
|
||
|
||
return normal_pid_to_str (ptid);
|
||
}
|
||
else
|
||
{
|
||
if (ptid_equal (magic_null_ptid, ptid))
|
||
xsnprintf (buf, sizeof buf, "Thread <main>");
|
||
else if (remote_multi_process_p (rs))
|
||
xsnprintf (buf, sizeof buf, "Thread %d.%ld",
|
||
ptid_get_pid (ptid), ptid_get_tid (ptid));
|
||
else
|
||
xsnprintf (buf, sizeof buf, "Thread %ld",
|
||
ptid_get_tid (ptid));
|
||
return buf;
|
||
}
|
||
}
|
||
|
||
/* Get the address of the thread local variable in OBJFILE which is
|
||
stored at OFFSET within the thread local storage for thread PTID. */
|
||
|
||
static CORE_ADDR
|
||
remote_get_thread_local_address (struct target_ops *ops,
|
||
ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
|
||
{
|
||
if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
char *endp = rs->buf + get_remote_packet_size ();
|
||
enum packet_result result;
|
||
|
||
strcpy (p, "qGetTLSAddr:");
|
||
p += strlen (p);
|
||
p = write_ptid (p, endp, ptid);
|
||
*p++ = ',';
|
||
p += hexnumstr (p, offset);
|
||
*p++ = ',';
|
||
p += hexnumstr (p, lm);
|
||
*p++ = '\0';
|
||
|
||
putpkt (rs->buf);
|
||
getpkt (&rs->buf, &rs->buf_size, 0);
|
||
result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
|
||
if (result == PACKET_OK)
|
||
{
|
||
ULONGEST result;
|
||
|
||
unpack_varlen_hex (rs->buf, &result);
|
||
return result;
|
||
}
|
||
else if (result == PACKET_UNKNOWN)
|
||
throw_error (TLS_GENERIC_ERROR,
|
||
_("Remote target doesn't support qGetTLSAddr packet"));
|
||
else
|
||
throw_error (TLS_GENERIC_ERROR,
|
||
_("Remote target failed to process qGetTLSAddr request"));
|
||
}
|
||
else
|
||
throw_error (TLS_GENERIC_ERROR,
|
||
_("TLS not supported or disabled on this target"));
|
||
/* Not reached. */
|
||
return 0;
|
||
}
|
||
|
||
/* Support for inferring a target description based on the current
|
||
architecture and the size of a 'g' packet. While the 'g' packet
|
||
can have any size (since optional registers can be left off the
|
||
end), some sizes are easily recognizable given knowledge of the
|
||
approximate architecture. */
|
||
|
||
struct remote_g_packet_guess
|
||
{
|
||
int bytes;
|
||
const struct target_desc *tdesc;
|
||
};
|
||
typedef struct remote_g_packet_guess remote_g_packet_guess_s;
|
||
DEF_VEC_O(remote_g_packet_guess_s);
|
||
|
||
struct remote_g_packet_data
|
||
{
|
||
VEC(remote_g_packet_guess_s) *guesses;
|
||
};
|
||
|
||
static struct gdbarch_data *remote_g_packet_data_handle;
|
||
|
||
static void *
|
||
remote_g_packet_data_init (struct obstack *obstack)
|
||
{
|
||
return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
|
||
}
|
||
|
||
void
|
||
register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
|
||
const struct target_desc *tdesc)
|
||
{
|
||
struct remote_g_packet_data *data
|
||
= gdbarch_data (gdbarch, remote_g_packet_data_handle);
|
||
struct remote_g_packet_guess new_guess, *guess;
|
||
int ix;
|
||
|
||
gdb_assert (tdesc != NULL);
|
||
|
||
for (ix = 0;
|
||
VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
|
||
ix++)
|
||
if (guess->bytes == bytes)
|
||
internal_error (__FILE__, __LINE__,
|
||
"Duplicate g packet description added for size %d",
|
||
bytes);
|
||
|
||
new_guess.bytes = bytes;
|
||
new_guess.tdesc = tdesc;
|
||
VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
|
||
}
|
||
|
||
/* Return 1 if remote_read_description would do anything on this target
|
||
and architecture, 0 otherwise. */
|
||
|
||
static int
|
||
remote_read_description_p (struct target_ops *target)
|
||
{
|
||
struct remote_g_packet_data *data
|
||
= gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
|
||
|
||
if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static const struct target_desc *
|
||
remote_read_description (struct target_ops *target)
|
||
{
|
||
struct remote_g_packet_data *data
|
||
= gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
|
||
|
||
/* Do not try this during initial connection, when we do not know
|
||
whether there is a running but stopped thread. */
|
||
if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
|
||
return NULL;
|
||
|
||
if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
|
||
{
|
||
struct remote_g_packet_guess *guess;
|
||
int ix;
|
||
int bytes = send_g_packet ();
|
||
|
||
for (ix = 0;
|
||
VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
|
||
ix++)
|
||
if (guess->bytes == bytes)
|
||
return guess->tdesc;
|
||
|
||
/* We discard the g packet. A minor optimization would be to
|
||
hold on to it, and fill the register cache once we have selected
|
||
an architecture, but it's too tricky to do safely. */
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Remote file transfer support. This is host-initiated I/O, not
|
||
target-initiated; for target-initiated, see remote-fileio.c. */
|
||
|
||
/* If *LEFT is at least the length of STRING, copy STRING to
|
||
*BUFFER, update *BUFFER to point to the new end of the buffer, and
|
||
decrease *LEFT. Otherwise raise an error. */
|
||
|
||
static void
|
||
remote_buffer_add_string (char **buffer, int *left, char *string)
|
||
{
|
||
int len = strlen (string);
|
||
|
||
if (len > *left)
|
||
error (_("Packet too long for target."));
|
||
|
||
memcpy (*buffer, string, len);
|
||
*buffer += len;
|
||
*left -= len;
|
||
|
||
/* NUL-terminate the buffer as a convenience, if there is
|
||
room. */
|
||
if (*left)
|
||
**buffer = '\0';
|
||
}
|
||
|
||
/* If *LEFT is large enough, hex encode LEN bytes from BYTES into
|
||
*BUFFER, update *BUFFER to point to the new end of the buffer, and
|
||
decrease *LEFT. Otherwise raise an error. */
|
||
|
||
static void
|
||
remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
|
||
int len)
|
||
{
|
||
if (2 * len > *left)
|
||
error (_("Packet too long for target."));
|
||
|
||
bin2hex (bytes, *buffer, len);
|
||
*buffer += 2 * len;
|
||
*left -= 2 * len;
|
||
|
||
/* NUL-terminate the buffer as a convenience, if there is
|
||
room. */
|
||
if (*left)
|
||
**buffer = '\0';
|
||
}
|
||
|
||
/* If *LEFT is large enough, convert VALUE to hex and add it to
|
||
*BUFFER, update *BUFFER to point to the new end of the buffer, and
|
||
decrease *LEFT. Otherwise raise an error. */
|
||
|
||
static void
|
||
remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
|
||
{
|
||
int len = hexnumlen (value);
|
||
|
||
if (len > *left)
|
||
error (_("Packet too long for target."));
|
||
|
||
hexnumstr (*buffer, value);
|
||
*buffer += len;
|
||
*left -= len;
|
||
|
||
/* NUL-terminate the buffer as a convenience, if there is
|
||
room. */
|
||
if (*left)
|
||
**buffer = '\0';
|
||
}
|
||
|
||
/* Parse an I/O result packet from BUFFER. Set RETCODE to the return
|
||
value, *REMOTE_ERRNO to the remote error number or zero if none
|
||
was included, and *ATTACHMENT to point to the start of the annex
|
||
if any. The length of the packet isn't needed here; there may
|
||
be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
|
||
|
||
Return 0 if the packet could be parsed, -1 if it could not. If
|
||
-1 is returned, the other variables may not be initialized. */
|
||
|
||
static int
|
||
remote_hostio_parse_result (char *buffer, int *retcode,
|
||
int *remote_errno, char **attachment)
|
||
{
|
||
char *p, *p2;
|
||
|
||
*remote_errno = 0;
|
||
*attachment = NULL;
|
||
|
||
if (buffer[0] != 'F')
|
||
return -1;
|
||
|
||
errno = 0;
|
||
*retcode = strtol (&buffer[1], &p, 16);
|
||
if (errno != 0 || p == &buffer[1])
|
||
return -1;
|
||
|
||
/* Check for ",errno". */
|
||
if (*p == ',')
|
||
{
|
||
errno = 0;
|
||
*remote_errno = strtol (p + 1, &p2, 16);
|
||
if (errno != 0 || p + 1 == p2)
|
||
return -1;
|
||
p = p2;
|
||
}
|
||
|
||
/* Check for ";attachment". If there is no attachment, the
|
||
packet should end here. */
|
||
if (*p == ';')
|
||
{
|
||
*attachment = p + 1;
|
||
return 0;
|
||
}
|
||
else if (*p == '\0')
|
||
return 0;
|
||
else
|
||
return -1;
|
||
}
|
||
|
||
/* Send a prepared I/O packet to the target and read its response.
|
||
The prepared packet is in the global RS->BUF before this function
|
||
is called, and the answer is there when we return.
|
||
|
||
COMMAND_BYTES is the length of the request to send, which may include
|
||
binary data. WHICH_PACKET is the packet configuration to check
|
||
before attempting a packet. If an error occurs, *REMOTE_ERRNO
|
||
is set to the error number and -1 is returned. Otherwise the value
|
||
returned by the function is returned.
|
||
|
||
ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
|
||
attachment is expected; an error will be reported if there's a
|
||
mismatch. If one is found, *ATTACHMENT will be set to point into
|
||
the packet buffer and *ATTACHMENT_LEN will be set to the
|
||
attachment's length. */
|
||
|
||
static int
|
||
remote_hostio_send_command (int command_bytes, int which_packet,
|
||
int *remote_errno, char **attachment,
|
||
int *attachment_len)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
int ret, bytes_read;
|
||
char *attachment_tmp;
|
||
|
||
if (!remote_desc
|
||
|| remote_protocol_packets[which_packet].support == PACKET_DISABLE)
|
||
{
|
||
*remote_errno = FILEIO_ENOSYS;
|
||
return -1;
|
||
}
|
||
|
||
putpkt_binary (rs->buf, command_bytes);
|
||
bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
|
||
|
||
/* If it timed out, something is wrong. Don't try to parse the
|
||
buffer. */
|
||
if (bytes_read < 0)
|
||
{
|
||
*remote_errno = FILEIO_EINVAL;
|
||
return -1;
|
||
}
|
||
|
||
switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
|
||
{
|
||
case PACKET_ERROR:
|
||
*remote_errno = FILEIO_EINVAL;
|
||
return -1;
|
||
case PACKET_UNKNOWN:
|
||
*remote_errno = FILEIO_ENOSYS;
|
||
return -1;
|
||
case PACKET_OK:
|
||
break;
|
||
}
|
||
|
||
if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
|
||
&attachment_tmp))
|
||
{
|
||
*remote_errno = FILEIO_EINVAL;
|
||
return -1;
|
||
}
|
||
|
||
/* Make sure we saw an attachment if and only if we expected one. */
|
||
if ((attachment_tmp == NULL && attachment != NULL)
|
||
|| (attachment_tmp != NULL && attachment == NULL))
|
||
{
|
||
*remote_errno = FILEIO_EINVAL;
|
||
return -1;
|
||
}
|
||
|
||
/* If an attachment was found, it must point into the packet buffer;
|
||
work out how many bytes there were. */
|
||
if (attachment_tmp != NULL)
|
||
{
|
||
*attachment = attachment_tmp;
|
||
*attachment_len = bytes_read - (*attachment - rs->buf);
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Open FILENAME on the remote target, using FLAGS and MODE. Return a
|
||
remote file descriptor, or -1 if an error occurs (and set
|
||
*REMOTE_ERRNO). */
|
||
|
||
static int
|
||
remote_hostio_open (const char *filename, int flags, int mode,
|
||
int *remote_errno)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
int left = get_remote_packet_size () - 1;
|
||
|
||
remote_buffer_add_string (&p, &left, "vFile:open:");
|
||
|
||
remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
|
||
strlen (filename));
|
||
remote_buffer_add_string (&p, &left, ",");
|
||
|
||
remote_buffer_add_int (&p, &left, flags);
|
||
remote_buffer_add_string (&p, &left, ",");
|
||
|
||
remote_buffer_add_int (&p, &left, mode);
|
||
|
||
return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
|
||
remote_errno, NULL, NULL);
|
||
}
|
||
|
||
/* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
|
||
Return the number of bytes written, or -1 if an error occurs (and
|
||
set *REMOTE_ERRNO). */
|
||
|
||
static int
|
||
remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
|
||
ULONGEST offset, int *remote_errno)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
int left = get_remote_packet_size ();
|
||
int out_len;
|
||
|
||
remote_buffer_add_string (&p, &left, "vFile:pwrite:");
|
||
|
||
remote_buffer_add_int (&p, &left, fd);
|
||
remote_buffer_add_string (&p, &left, ",");
|
||
|
||
remote_buffer_add_int (&p, &left, offset);
|
||
remote_buffer_add_string (&p, &left, ",");
|
||
|
||
p += remote_escape_output (write_buf, len, p, &out_len,
|
||
get_remote_packet_size () - (p - rs->buf));
|
||
|
||
return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
|
||
remote_errno, NULL, NULL);
|
||
}
|
||
|
||
/* Read up to LEN bytes FD on the remote target into READ_BUF
|
||
Return the number of bytes read, or -1 if an error occurs (and
|
||
set *REMOTE_ERRNO). */
|
||
|
||
static int
|
||
remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
|
||
ULONGEST offset, int *remote_errno)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
char *attachment;
|
||
int left = get_remote_packet_size ();
|
||
int ret, attachment_len;
|
||
int read_len;
|
||
|
||
remote_buffer_add_string (&p, &left, "vFile:pread:");
|
||
|
||
remote_buffer_add_int (&p, &left, fd);
|
||
remote_buffer_add_string (&p, &left, ",");
|
||
|
||
remote_buffer_add_int (&p, &left, len);
|
||
remote_buffer_add_string (&p, &left, ",");
|
||
|
||
remote_buffer_add_int (&p, &left, offset);
|
||
|
||
ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
|
||
remote_errno, &attachment,
|
||
&attachment_len);
|
||
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
read_len = remote_unescape_input (attachment, attachment_len,
|
||
read_buf, len);
|
||
if (read_len != ret)
|
||
error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Close FD on the remote target. Return 0, or -1 if an error occurs
|
||
(and set *REMOTE_ERRNO). */
|
||
|
||
static int
|
||
remote_hostio_close (int fd, int *remote_errno)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
int left = get_remote_packet_size () - 1;
|
||
|
||
remote_buffer_add_string (&p, &left, "vFile:close:");
|
||
|
||
remote_buffer_add_int (&p, &left, fd);
|
||
|
||
return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
|
||
remote_errno, NULL, NULL);
|
||
}
|
||
|
||
/* Unlink FILENAME on the remote target. Return 0, or -1 if an error
|
||
occurs (and set *REMOTE_ERRNO). */
|
||
|
||
static int
|
||
remote_hostio_unlink (const char *filename, int *remote_errno)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
char *p = rs->buf;
|
||
int left = get_remote_packet_size () - 1;
|
||
|
||
remote_buffer_add_string (&p, &left, "vFile:unlink:");
|
||
|
||
remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
|
||
strlen (filename));
|
||
|
||
return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
|
||
remote_errno, NULL, NULL);
|
||
}
|
||
|
||
static int
|
||
remote_fileio_errno_to_host (int errnum)
|
||
{
|
||
switch (errnum)
|
||
{
|
||
case FILEIO_EPERM:
|
||
return EPERM;
|
||
case FILEIO_ENOENT:
|
||
return ENOENT;
|
||
case FILEIO_EINTR:
|
||
return EINTR;
|
||
case FILEIO_EIO:
|
||
return EIO;
|
||
case FILEIO_EBADF:
|
||
return EBADF;
|
||
case FILEIO_EACCES:
|
||
return EACCES;
|
||
case FILEIO_EFAULT:
|
||
return EFAULT;
|
||
case FILEIO_EBUSY:
|
||
return EBUSY;
|
||
case FILEIO_EEXIST:
|
||
return EEXIST;
|
||
case FILEIO_ENODEV:
|
||
return ENODEV;
|
||
case FILEIO_ENOTDIR:
|
||
return ENOTDIR;
|
||
case FILEIO_EISDIR:
|
||
return EISDIR;
|
||
case FILEIO_EINVAL:
|
||
return EINVAL;
|
||
case FILEIO_ENFILE:
|
||
return ENFILE;
|
||
case FILEIO_EMFILE:
|
||
return EMFILE;
|
||
case FILEIO_EFBIG:
|
||
return EFBIG;
|
||
case FILEIO_ENOSPC:
|
||
return ENOSPC;
|
||
case FILEIO_ESPIPE:
|
||
return ESPIPE;
|
||
case FILEIO_EROFS:
|
||
return EROFS;
|
||
case FILEIO_ENOSYS:
|
||
return ENOSYS;
|
||
case FILEIO_ENAMETOOLONG:
|
||
return ENAMETOOLONG;
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
static char *
|
||
remote_hostio_error (int errnum)
|
||
{
|
||
int host_error = remote_fileio_errno_to_host (errnum);
|
||
|
||
if (host_error == -1)
|
||
error (_("Unknown remote I/O error %d"), errnum);
|
||
else
|
||
error (_("Remote I/O error: %s"), safe_strerror (host_error));
|
||
}
|
||
|
||
static void
|
||
remote_hostio_close_cleanup (void *opaque)
|
||
{
|
||
int fd = *(int *) opaque;
|
||
int remote_errno;
|
||
|
||
remote_hostio_close (fd, &remote_errno);
|
||
}
|
||
|
||
|
||
static void *
|
||
remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
|
||
{
|
||
const char *filename = bfd_get_filename (abfd);
|
||
int fd, remote_errno;
|
||
int *stream;
|
||
|
||
gdb_assert (remote_filename_p (filename));
|
||
|
||
fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
|
||
if (fd == -1)
|
||
{
|
||
errno = remote_fileio_errno_to_host (remote_errno);
|
||
bfd_set_error (bfd_error_system_call);
|
||
return NULL;
|
||
}
|
||
|
||
stream = xmalloc (sizeof (int));
|
||
*stream = fd;
|
||
return stream;
|
||
}
|
||
|
||
static int
|
||
remote_bfd_iovec_close (struct bfd *abfd, void *stream)
|
||
{
|
||
int fd = *(int *)stream;
|
||
int remote_errno;
|
||
|
||
xfree (stream);
|
||
|
||
/* Ignore errors on close; these may happen if the remote
|
||
connection was already torn down. */
|
||
remote_hostio_close (fd, &remote_errno);
|
||
|
||
return 1;
|
||
}
|
||
|
||
static file_ptr
|
||
remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
|
||
file_ptr nbytes, file_ptr offset)
|
||
{
|
||
int fd = *(int *)stream;
|
||
int remote_errno;
|
||
file_ptr pos, bytes;
|
||
|
||
pos = 0;
|
||
while (nbytes > pos)
|
||
{
|
||
bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
|
||
offset + pos, &remote_errno);
|
||
if (bytes == 0)
|
||
/* Success, but no bytes, means end-of-file. */
|
||
break;
|
||
if (bytes == -1)
|
||
{
|
||
errno = remote_fileio_errno_to_host (remote_errno);
|
||
bfd_set_error (bfd_error_system_call);
|
||
return -1;
|
||
}
|
||
|
||
pos += bytes;
|
||
}
|
||
|
||
return pos;
|
||
}
|
||
|
||
static int
|
||
remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
|
||
{
|
||
/* FIXME: We should probably implement remote_hostio_stat. */
|
||
sb->st_size = INT_MAX;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
remote_filename_p (const char *filename)
|
||
{
|
||
return strncmp (filename, "remote:", 7) == 0;
|
||
}
|
||
|
||
bfd *
|
||
remote_bfd_open (const char *remote_file, const char *target)
|
||
{
|
||
return bfd_openr_iovec (remote_file, target,
|
||
remote_bfd_iovec_open, NULL,
|
||
remote_bfd_iovec_pread,
|
||
remote_bfd_iovec_close,
|
||
remote_bfd_iovec_stat);
|
||
}
|
||
|
||
void
|
||
remote_file_put (const char *local_file, const char *remote_file, int from_tty)
|
||
{
|
||
struct cleanup *back_to, *close_cleanup;
|
||
int retcode, fd, remote_errno, bytes, io_size;
|
||
FILE *file;
|
||
gdb_byte *buffer;
|
||
int bytes_in_buffer;
|
||
int saw_eof;
|
||
ULONGEST offset;
|
||
|
||
if (!remote_desc)
|
||
error (_("command can only be used with remote target"));
|
||
|
||
file = fopen (local_file, "rb");
|
||
if (file == NULL)
|
||
perror_with_name (local_file);
|
||
back_to = make_cleanup_fclose (file);
|
||
|
||
fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
|
||
| FILEIO_O_TRUNC),
|
||
0700, &remote_errno);
|
||
if (fd == -1)
|
||
remote_hostio_error (remote_errno);
|
||
|
||
/* Send up to this many bytes at once. They won't all fit in the
|
||
remote packet limit, so we'll transfer slightly fewer. */
|
||
io_size = get_remote_packet_size ();
|
||
buffer = xmalloc (io_size);
|
||
make_cleanup (xfree, buffer);
|
||
|
||
close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
|
||
|
||
bytes_in_buffer = 0;
|
||
saw_eof = 0;
|
||
offset = 0;
|
||
while (bytes_in_buffer || !saw_eof)
|
||
{
|
||
if (!saw_eof)
|
||
{
|
||
bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
|
||
file);
|
||
if (bytes == 0)
|
||
{
|
||
if (ferror (file))
|
||
error (_("Error reading %s."), local_file);
|
||
else
|
||
{
|
||
/* EOF. Unless there is something still in the
|
||
buffer from the last iteration, we are done. */
|
||
saw_eof = 1;
|
||
if (bytes_in_buffer == 0)
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
bytes = 0;
|
||
|
||
bytes += bytes_in_buffer;
|
||
bytes_in_buffer = 0;
|
||
|
||
retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
|
||
|
||
if (retcode < 0)
|
||
remote_hostio_error (remote_errno);
|
||
else if (retcode == 0)
|
||
error (_("Remote write of %d bytes returned 0!"), bytes);
|
||
else if (retcode < bytes)
|
||
{
|
||
/* Short write. Save the rest of the read data for the next
|
||
write. */
|
||
bytes_in_buffer = bytes - retcode;
|
||
memmove (buffer, buffer + retcode, bytes_in_buffer);
|
||
}
|
||
|
||
offset += retcode;
|
||
}
|
||
|
||
discard_cleanups (close_cleanup);
|
||
if (remote_hostio_close (fd, &remote_errno))
|
||
remote_hostio_error (remote_errno);
|
||
|
||
if (from_tty)
|
||
printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
void
|
||
remote_file_get (const char *remote_file, const char *local_file, int from_tty)
|
||
{
|
||
struct cleanup *back_to, *close_cleanup;
|
||
int fd, remote_errno, bytes, io_size;
|
||
FILE *file;
|
||
gdb_byte *buffer;
|
||
ULONGEST offset;
|
||
|
||
if (!remote_desc)
|
||
error (_("command can only be used with remote target"));
|
||
|
||
fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
|
||
if (fd == -1)
|
||
remote_hostio_error (remote_errno);
|
||
|
||
file = fopen (local_file, "wb");
|
||
if (file == NULL)
|
||
perror_with_name (local_file);
|
||
back_to = make_cleanup_fclose (file);
|
||
|
||
/* Send up to this many bytes at once. They won't all fit in the
|
||
remote packet limit, so we'll transfer slightly fewer. */
|
||
io_size = get_remote_packet_size ();
|
||
buffer = xmalloc (io_size);
|
||
make_cleanup (xfree, buffer);
|
||
|
||
close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
|
||
|
||
offset = 0;
|
||
while (1)
|
||
{
|
||
bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
|
||
if (bytes == 0)
|
||
/* Success, but no bytes, means end-of-file. */
|
||
break;
|
||
if (bytes == -1)
|
||
remote_hostio_error (remote_errno);
|
||
|
||
offset += bytes;
|
||
|
||
bytes = fwrite (buffer, 1, bytes, file);
|
||
if (bytes == 0)
|
||
perror_with_name (local_file);
|
||
}
|
||
|
||
discard_cleanups (close_cleanup);
|
||
if (remote_hostio_close (fd, &remote_errno))
|
||
remote_hostio_error (remote_errno);
|
||
|
||
if (from_tty)
|
||
printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
void
|
||
remote_file_delete (const char *remote_file, int from_tty)
|
||
{
|
||
int retcode, remote_errno;
|
||
|
||
if (!remote_desc)
|
||
error (_("command can only be used with remote target"));
|
||
|
||
retcode = remote_hostio_unlink (remote_file, &remote_errno);
|
||
if (retcode == -1)
|
||
remote_hostio_error (remote_errno);
|
||
|
||
if (from_tty)
|
||
printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
|
||
}
|
||
|
||
static void
|
||
remote_put_command (char *args, int from_tty)
|
||
{
|
||
struct cleanup *back_to;
|
||
char **argv;
|
||
|
||
if (args == NULL)
|
||
error_no_arg (_("file to put"));
|
||
|
||
argv = gdb_buildargv (args);
|
||
back_to = make_cleanup_freeargv (argv);
|
||
if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
|
||
error (_("Invalid parameters to remote put"));
|
||
|
||
remote_file_put (argv[0], argv[1], from_tty);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static void
|
||
remote_get_command (char *args, int from_tty)
|
||
{
|
||
struct cleanup *back_to;
|
||
char **argv;
|
||
|
||
if (args == NULL)
|
||
error_no_arg (_("file to get"));
|
||
|
||
argv = gdb_buildargv (args);
|
||
back_to = make_cleanup_freeargv (argv);
|
||
if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
|
||
error (_("Invalid parameters to remote get"));
|
||
|
||
remote_file_get (argv[0], argv[1], from_tty);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static void
|
||
remote_delete_command (char *args, int from_tty)
|
||
{
|
||
struct cleanup *back_to;
|
||
char **argv;
|
||
|
||
if (args == NULL)
|
||
error_no_arg (_("file to delete"));
|
||
|
||
argv = gdb_buildargv (args);
|
||
back_to = make_cleanup_freeargv (argv);
|
||
if (argv[0] == NULL || argv[1] != NULL)
|
||
error (_("Invalid parameters to remote delete"));
|
||
|
||
remote_file_delete (argv[0], from_tty);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static void
|
||
remote_command (char *args, int from_tty)
|
||
{
|
||
help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
|
||
}
|
||
|
||
static int remote_target_can_reverse = 1;
|
||
|
||
static int
|
||
remote_can_execute_reverse (void)
|
||
{
|
||
return remote_target_can_reverse;
|
||
}
|
||
|
||
static int
|
||
remote_supports_non_stop (void)
|
||
{
|
||
return 1;
|
||
}
|
||
|
||
static int
|
||
remote_supports_multi_process (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
return remote_multi_process_p (rs);
|
||
}
|
||
|
||
int
|
||
remote_supports_cond_tracepoints (void)
|
||
{
|
||
struct remote_state *rs = get_remote_state ();
|
||
return rs->cond_tracepoints;
|
||
}
|
||
|
||
static void
|
||
init_remote_ops (void)
|
||
{
|
||
remote_ops.to_shortname = "remote";
|
||
remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
|
||
remote_ops.to_doc =
|
||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||
Specify the serial device it is connected to\n\
|
||
(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
|
||
remote_ops.to_open = remote_open;
|
||
remote_ops.to_close = remote_close;
|
||
remote_ops.to_detach = remote_detach;
|
||
remote_ops.to_disconnect = remote_disconnect;
|
||
remote_ops.to_resume = remote_resume;
|
||
remote_ops.to_wait = remote_wait;
|
||
remote_ops.to_fetch_registers = remote_fetch_registers;
|
||
remote_ops.to_store_registers = remote_store_registers;
|
||
remote_ops.to_prepare_to_store = remote_prepare_to_store;
|
||
remote_ops.deprecated_xfer_memory = remote_xfer_memory;
|
||
remote_ops.to_files_info = remote_files_info;
|
||
remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
|
||
remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
|
||
remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
|
||
remote_ops.to_stopped_data_address = remote_stopped_data_address;
|
||
remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
|
||
remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
|
||
remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
|
||
remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
|
||
remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
|
||
remote_ops.to_kill = remote_kill;
|
||
remote_ops.to_load = generic_load;
|
||
remote_ops.to_mourn_inferior = remote_mourn;
|
||
remote_ops.to_thread_alive = remote_thread_alive;
|
||
remote_ops.to_find_new_threads = remote_threads_info;
|
||
remote_ops.to_pid_to_str = remote_pid_to_str;
|
||
remote_ops.to_extra_thread_info = remote_threads_extra_info;
|
||
remote_ops.to_stop = remote_stop;
|
||
remote_ops.to_xfer_partial = remote_xfer_partial;
|
||
remote_ops.to_rcmd = remote_rcmd;
|
||
remote_ops.to_log_command = serial_log_command;
|
||
remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
|
||
remote_ops.to_stratum = process_stratum;
|
||
remote_ops.to_has_all_memory = default_child_has_all_memory;
|
||
remote_ops.to_has_memory = default_child_has_memory;
|
||
remote_ops.to_has_stack = default_child_has_stack;
|
||
remote_ops.to_has_registers = default_child_has_registers;
|
||
remote_ops.to_has_execution = default_child_has_execution;
|
||
remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
|
||
remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
|
||
remote_ops.to_magic = OPS_MAGIC;
|
||
remote_ops.to_memory_map = remote_memory_map;
|
||
remote_ops.to_flash_erase = remote_flash_erase;
|
||
remote_ops.to_flash_done = remote_flash_done;
|
||
remote_ops.to_read_description = remote_read_description;
|
||
remote_ops.to_search_memory = remote_search_memory;
|
||
remote_ops.to_can_async_p = remote_can_async_p;
|
||
remote_ops.to_is_async_p = remote_is_async_p;
|
||
remote_ops.to_async = remote_async;
|
||
remote_ops.to_async_mask = remote_async_mask;
|
||
remote_ops.to_terminal_inferior = remote_terminal_inferior;
|
||
remote_ops.to_terminal_ours = remote_terminal_ours;
|
||
remote_ops.to_supports_non_stop = remote_supports_non_stop;
|
||
remote_ops.to_supports_multi_process = remote_supports_multi_process;
|
||
}
|
||
|
||
/* Set up the extended remote vector by making a copy of the standard
|
||
remote vector and adding to it. */
|
||
|
||
static void
|
||
init_extended_remote_ops (void)
|
||
{
|
||
extended_remote_ops = remote_ops;
|
||
|
||
extended_remote_ops.to_shortname = "extended-remote";
|
||
extended_remote_ops.to_longname =
|
||
"Extended remote serial target in gdb-specific protocol";
|
||
extended_remote_ops.to_doc =
|
||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||
Specify the serial device it is connected to (e.g. /dev/ttya).";
|
||
extended_remote_ops.to_open = extended_remote_open;
|
||
extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
|
||
extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
|
||
extended_remote_ops.to_detach = extended_remote_detach;
|
||
extended_remote_ops.to_attach = extended_remote_attach;
|
||
extended_remote_ops.to_kill = extended_remote_kill;
|
||
}
|
||
|
||
static int
|
||
remote_can_async_p (void)
|
||
{
|
||
if (!target_async_permitted)
|
||
/* We only enable async when the user specifically asks for it. */
|
||
return 0;
|
||
|
||
/* We're async whenever the serial device is. */
|
||
return remote_async_mask_value && serial_can_async_p (remote_desc);
|
||
}
|
||
|
||
static int
|
||
remote_is_async_p (void)
|
||
{
|
||
if (!target_async_permitted)
|
||
/* We only enable async when the user specifically asks for it. */
|
||
return 0;
|
||
|
||
/* We're async whenever the serial device is. */
|
||
return remote_async_mask_value && serial_is_async_p (remote_desc);
|
||
}
|
||
|
||
/* Pass the SERIAL event on and up to the client. One day this code
|
||
will be able to delay notifying the client of an event until the
|
||
point where an entire packet has been received. */
|
||
|
||
static void (*async_client_callback) (enum inferior_event_type event_type,
|
||
void *context);
|
||
static void *async_client_context;
|
||
static serial_event_ftype remote_async_serial_handler;
|
||
|
||
static void
|
||
remote_async_serial_handler (struct serial *scb, void *context)
|
||
{
|
||
/* Don't propogate error information up to the client. Instead let
|
||
the client find out about the error by querying the target. */
|
||
async_client_callback (INF_REG_EVENT, async_client_context);
|
||
}
|
||
|
||
static void
|
||
remote_async_inferior_event_handler (gdb_client_data data)
|
||
{
|
||
inferior_event_handler (INF_REG_EVENT, NULL);
|
||
}
|
||
|
||
static void
|
||
remote_async_get_pending_events_handler (gdb_client_data data)
|
||
{
|
||
remote_get_pending_stop_replies ();
|
||
}
|
||
|
||
static void
|
||
remote_async (void (*callback) (enum inferior_event_type event_type,
|
||
void *context), void *context)
|
||
{
|
||
if (remote_async_mask_value == 0)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Calling remote_async when async is masked"));
|
||
|
||
if (callback != NULL)
|
||
{
|
||
serial_async (remote_desc, remote_async_serial_handler, NULL);
|
||
async_client_callback = callback;
|
||
async_client_context = context;
|
||
}
|
||
else
|
||
serial_async (remote_desc, NULL, NULL);
|
||
}
|
||
|
||
static int
|
||
remote_async_mask (int new_mask)
|
||
{
|
||
int curr_mask = remote_async_mask_value;
|
||
remote_async_mask_value = new_mask;
|
||
return curr_mask;
|
||
}
|
||
|
||
static void
|
||
set_remote_cmd (char *args, int from_tty)
|
||
{
|
||
help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
show_remote_cmd (char *args, int from_tty)
|
||
{
|
||
/* We can't just use cmd_show_list here, because we want to skip
|
||
the redundant "show remote Z-packet" and the legacy aliases. */
|
||
struct cleanup *showlist_chain;
|
||
struct cmd_list_element *list = remote_show_cmdlist;
|
||
|
||
showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
|
||
for (; list != NULL; list = list->next)
|
||
if (strcmp (list->name, "Z-packet") == 0)
|
||
continue;
|
||
else if (list->type == not_set_cmd)
|
||
/* Alias commands are exactly like the original, except they
|
||
don't have the normal type. */
|
||
continue;
|
||
else
|
||
{
|
||
struct cleanup *option_chain
|
||
= make_cleanup_ui_out_tuple_begin_end (uiout, "option");
|
||
ui_out_field_string (uiout, "name", list->name);
|
||
ui_out_text (uiout, ": ");
|
||
if (list->type == show_cmd)
|
||
do_setshow_command ((char *) NULL, from_tty, list);
|
||
else
|
||
cmd_func (list, NULL, from_tty);
|
||
/* Close the tuple. */
|
||
do_cleanups (option_chain);
|
||
}
|
||
|
||
/* Close the tuple. */
|
||
do_cleanups (showlist_chain);
|
||
}
|
||
|
||
|
||
/* Function to be called whenever a new objfile (shlib) is detected. */
|
||
static void
|
||
remote_new_objfile (struct objfile *objfile)
|
||
{
|
||
if (remote_desc != 0) /* Have a remote connection. */
|
||
remote_check_symbols (objfile);
|
||
}
|
||
|
||
void
|
||
_initialize_remote (void)
|
||
{
|
||
struct remote_state *rs;
|
||
|
||
/* architecture specific data */
|
||
remote_gdbarch_data_handle =
|
||
gdbarch_data_register_post_init (init_remote_state);
|
||
remote_g_packet_data_handle =
|
||
gdbarch_data_register_pre_init (remote_g_packet_data_init);
|
||
|
||
/* Initialize the per-target state. At the moment there is only one
|
||
of these, not one per target. Only one target is active at a
|
||
time. The default buffer size is unimportant; it will be expanded
|
||
whenever a larger buffer is needed. */
|
||
rs = get_remote_state_raw ();
|
||
rs->buf_size = 400;
|
||
rs->buf = xmalloc (rs->buf_size);
|
||
|
||
init_remote_ops ();
|
||
add_target (&remote_ops);
|
||
|
||
init_extended_remote_ops ();
|
||
add_target (&extended_remote_ops);
|
||
|
||
/* Hook into new objfile notification. */
|
||
observer_attach_new_objfile (remote_new_objfile);
|
||
|
||
/* Set up signal handlers. */
|
||
sigint_remote_token =
|
||
create_async_signal_handler (async_remote_interrupt, NULL);
|
||
sigint_remote_twice_token =
|
||
create_async_signal_handler (inferior_event_handler_wrapper, NULL);
|
||
|
||
#if 0
|
||
init_remote_threadtests ();
|
||
#endif
|
||
|
||
/* set/show remote ... */
|
||
|
||
add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
|
||
Remote protocol specific variables\n\
|
||
Configure various remote-protocol specific variables such as\n\
|
||
the packets being used"),
|
||
&remote_set_cmdlist, "set remote ",
|
||
0 /* allow-unknown */, &setlist);
|
||
add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
|
||
Remote protocol specific variables\n\
|
||
Configure various remote-protocol specific variables such as\n\
|
||
the packets being used"),
|
||
&remote_show_cmdlist, "show remote ",
|
||
0 /* allow-unknown */, &showlist);
|
||
|
||
add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
|
||
Compare section data on target to the exec file.\n\
|
||
Argument is a single section name (default: all loaded sections)."),
|
||
&cmdlist);
|
||
|
||
add_cmd ("packet", class_maintenance, packet_command, _("\
|
||
Send an arbitrary packet to a remote target.\n\
|
||
maintenance packet TEXT\n\
|
||
If GDB is talking to an inferior via the GDB serial protocol, then\n\
|
||
this command sends the string TEXT to the inferior, and displays the\n\
|
||
response packet. GDB supplies the initial `$' character, and the\n\
|
||
terminating `#' character and checksum."),
|
||
&maintenancelist);
|
||
|
||
add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
|
||
Set whether to send break if interrupted."), _("\
|
||
Show whether to send break if interrupted."), _("\
|
||
If set, a break, instead of a cntrl-c, is sent to the remote target."),
|
||
NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */
|
||
&setlist, &showlist);
|
||
|
||
/* Install commands for configuring memory read/write packets. */
|
||
|
||
add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
|
||
Set the maximum number of bytes per memory write packet (deprecated)."),
|
||
&setlist);
|
||
add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
|
||
Show the maximum number of bytes per memory write packet (deprecated)."),
|
||
&showlist);
|
||
add_cmd ("memory-write-packet-size", no_class,
|
||
set_memory_write_packet_size, _("\
|
||
Set the maximum number of bytes per memory-write packet.\n\
|
||
Specify the number of bytes in a packet or 0 (zero) for the\n\
|
||
default packet size. The actual limit is further reduced\n\
|
||
dependent on the target. Specify ``fixed'' to disable the\n\
|
||
further restriction and ``limit'' to enable that restriction."),
|
||
&remote_set_cmdlist);
|
||
add_cmd ("memory-read-packet-size", no_class,
|
||
set_memory_read_packet_size, _("\
|
||
Set the maximum number of bytes per memory-read packet.\n\
|
||
Specify the number of bytes in a packet or 0 (zero) for the\n\
|
||
default packet size. The actual limit is further reduced\n\
|
||
dependent on the target. Specify ``fixed'' to disable the\n\
|
||
further restriction and ``limit'' to enable that restriction."),
|
||
&remote_set_cmdlist);
|
||
add_cmd ("memory-write-packet-size", no_class,
|
||
show_memory_write_packet_size,
|
||
_("Show the maximum number of bytes per memory-write packet."),
|
||
&remote_show_cmdlist);
|
||
add_cmd ("memory-read-packet-size", no_class,
|
||
show_memory_read_packet_size,
|
||
_("Show the maximum number of bytes per memory-read packet."),
|
||
&remote_show_cmdlist);
|
||
|
||
add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
|
||
&remote_hw_watchpoint_limit, _("\
|
||
Set the maximum number of target hardware watchpoints."), _("\
|
||
Show the maximum number of target hardware watchpoints."), _("\
|
||
Specify a negative limit for unlimited."),
|
||
NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
|
||
&remote_set_cmdlist, &remote_show_cmdlist);
|
||
add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
|
||
&remote_hw_breakpoint_limit, _("\
|
||
Set the maximum number of target hardware breakpoints."), _("\
|
||
Show the maximum number of target hardware breakpoints."), _("\
|
||
Specify a negative limit for unlimited."),
|
||
NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
|
||
&remote_set_cmdlist, &remote_show_cmdlist);
|
||
|
||
add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
|
||
&remote_address_size, _("\
|
||
Set the maximum size of the address (in bits) in a memory packet."), _("\
|
||
Show the maximum size of the address (in bits) in a memory packet."), NULL,
|
||
NULL,
|
||
NULL, /* FIXME: i18n: */
|
||
&setlist, &showlist);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
|
||
"X", "binary-download", 1);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
|
||
"vCont", "verbose-resume", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
|
||
"QPassSignals", "pass-signals", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
|
||
"qSymbol", "symbol-lookup", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
|
||
"P", "set-register", 1);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
|
||
"p", "fetch-register", 1);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
|
||
"Z0", "software-breakpoint", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
|
||
"Z1", "hardware-breakpoint", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
|
||
"Z2", "write-watchpoint", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
|
||
"Z3", "read-watchpoint", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
|
||
"Z4", "access-watchpoint", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
|
||
"qXfer:auxv:read", "read-aux-vector", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
|
||
"qXfer:features:read", "target-features", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
|
||
"qXfer:libraries:read", "library-info", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
|
||
"qXfer:memory-map:read", "memory-map", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
|
||
"qXfer:spu:read", "read-spu-object", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
|
||
"qXfer:spu:write", "write-spu-object", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
|
||
"qXfer:osdata:read", "osdata", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
|
||
"qXfer:siginfo:read", "read-siginfo-object", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
|
||
"qXfer:siginfo:write", "write-siginfo-object", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
|
||
"qGetTLSAddr", "get-thread-local-storage-address",
|
||
0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
|
||
"qSupported", "supported-packets", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
|
||
"qSearch:memory", "search-memory", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
|
||
"vFile:open", "hostio-open", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
|
||
"vFile:pread", "hostio-pread", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
|
||
"vFile:pwrite", "hostio-pwrite", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
|
||
"vFile:close", "hostio-close", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
|
||
"vFile:unlink", "hostio-unlink", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
|
||
"vAttach", "attach", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
|
||
"vRun", "run", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
|
||
"QStartNoAckMode", "noack", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
|
||
"vKill", "kill", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
|
||
"qAttached", "query-attached", 0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
|
||
"ConditionalTracepoints", "conditional-tracepoints", 0);
|
||
|
||
/* Keep the old ``set remote Z-packet ...'' working. Each individual
|
||
Z sub-packet has its own set and show commands, but users may
|
||
have sets to this variable in their .gdbinit files (or in their
|
||
documentation). */
|
||
add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
|
||
&remote_Z_packet_detect, _("\
|
||
Set use of remote protocol `Z' packets"), _("\
|
||
Show use of remote protocol `Z' packets "), _("\
|
||
When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
|
||
packets."),
|
||
set_remote_protocol_Z_packet_cmd,
|
||
show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
|
||
&remote_set_cmdlist, &remote_show_cmdlist);
|
||
|
||
add_prefix_cmd ("remote", class_files, remote_command, _("\
|
||
Manipulate files on the remote system\n\
|
||
Transfer files to and from the remote target system."),
|
||
&remote_cmdlist, "remote ",
|
||
0 /* allow-unknown */, &cmdlist);
|
||
|
||
add_cmd ("put", class_files, remote_put_command,
|
||
_("Copy a local file to the remote system."),
|
||
&remote_cmdlist);
|
||
|
||
add_cmd ("get", class_files, remote_get_command,
|
||
_("Copy a remote file to the local system."),
|
||
&remote_cmdlist);
|
||
|
||
add_cmd ("delete", class_files, remote_delete_command,
|
||
_("Delete a remote file."),
|
||
&remote_cmdlist);
|
||
|
||
remote_exec_file = xstrdup ("");
|
||
add_setshow_string_noescape_cmd ("exec-file", class_files,
|
||
&remote_exec_file, _("\
|
||
Set the remote pathname for \"run\""), _("\
|
||
Show the remote pathname for \"run\""), NULL, NULL, NULL,
|
||
&remote_set_cmdlist, &remote_show_cmdlist);
|
||
|
||
/* Eventually initialize fileio. See fileio.c */
|
||
initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
|
||
|
||
/* Take advantage of the fact that the LWP field is not used, to tag
|
||
special ptids with it set to != 0. */
|
||
magic_null_ptid = ptid_build (42000, 1, -1);
|
||
not_sent_ptid = ptid_build (42000, 1, -2);
|
||
any_thread_ptid = ptid_build (42000, 1, 0);
|
||
}
|