3657 lines
88 KiB
C
3657 lines
88 KiB
C
/* Main code for remote server for GDB.
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Copyright (C) 1989-2013 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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#include "server.h"
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#include "gdbthread.h"
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#include "agent.h"
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#include "notif.h"
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#include "tdesc.h"
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#include <unistd.h>
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#if HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#include "gdb_wait.h"
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#include "btrace-common.h"
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/* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
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`vCont'. Note the multi-process extensions made `vCont' a
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requirement, so `Hc pPID.TID' is pretty much undefined. So
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CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
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resuming all threads of the process (again, `Hc' isn't used for
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multi-process), or a specific thread ptid_t.
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We also set this when handling a single-thread `vCont' resume, as
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some places in the backends check it to know when (and for which
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thread) single-thread scheduler-locking is in effect. */
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ptid_t cont_thread;
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/* The thread set with an `Hg' packet. */
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ptid_t general_thread;
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int server_waiting;
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static int extended_protocol;
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static int response_needed;
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static int exit_requested;
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/* --once: Exit after the first connection has closed. */
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int run_once;
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int multi_process;
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int non_stop;
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/* Whether we should attempt to disable the operating system's address
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space randomization feature before starting an inferior. */
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int disable_randomization = 1;
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static char **program_argv, **wrapper_argv;
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/* Enable miscellaneous debugging output. The name is historical - it
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was originally used to debug LinuxThreads support. */
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int debug_threads;
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/* Enable debugging of h/w breakpoint/watchpoint support. */
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int debug_hw_points;
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int pass_signals[GDB_SIGNAL_LAST];
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int program_signals[GDB_SIGNAL_LAST];
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int program_signals_p;
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jmp_buf toplevel;
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/* The PID of the originally created or attached inferior. Used to
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send signals to the process when GDB sends us an asynchronous interrupt
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(user hitting Control-C in the client), and to wait for the child to exit
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when no longer debugging it. */
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unsigned long signal_pid;
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#ifdef SIGTTOU
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/* A file descriptor for the controlling terminal. */
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int terminal_fd;
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/* TERMINAL_FD's original foreground group. */
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pid_t old_foreground_pgrp;
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/* Hand back terminal ownership to the original foreground group. */
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static void
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restore_old_foreground_pgrp (void)
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{
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tcsetpgrp (terminal_fd, old_foreground_pgrp);
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}
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#endif
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/* Set if you want to disable optional thread related packets support
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in gdbserver, for the sake of testing GDB against stubs that don't
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support them. */
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int disable_packet_vCont;
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int disable_packet_Tthread;
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int disable_packet_qC;
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int disable_packet_qfThreadInfo;
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/* Last status reported to GDB. */
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static struct target_waitstatus last_status;
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static ptid_t last_ptid;
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static char *own_buf;
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static unsigned char *mem_buf;
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/* A sub-class of 'struct notif_event' for stop, holding information
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relative to a single stop reply. We keep a queue of these to
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push to GDB in non-stop mode. */
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struct vstop_notif
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{
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struct notif_event base;
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/* Thread or process that got the event. */
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ptid_t ptid;
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/* Event info. */
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struct target_waitstatus status;
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};
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DEFINE_QUEUE_P (notif_event_p);
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/* Put a stop reply to the stop reply queue. */
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static void
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queue_stop_reply (ptid_t ptid, struct target_waitstatus *status)
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{
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struct vstop_notif *new_notif = xmalloc (sizeof (*new_notif));
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new_notif->ptid = ptid;
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new_notif->status = *status;
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notif_event_enque (¬if_stop, (struct notif_event *) new_notif);
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}
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static int
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remove_all_on_match_pid (QUEUE (notif_event_p) *q,
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QUEUE_ITER (notif_event_p) *iter,
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struct notif_event *event,
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void *data)
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{
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int *pid = data;
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if (*pid == -1
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|| ptid_get_pid (((struct vstop_notif *) event)->ptid) == *pid)
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{
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if (q->free_func != NULL)
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q->free_func (event);
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QUEUE_remove_elem (notif_event_p, q, iter);
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}
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return 1;
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}
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/* Get rid of the currently pending stop replies for PID. If PID is
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-1, then apply to all processes. */
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static void
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discard_queued_stop_replies (int pid)
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{
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QUEUE_iterate (notif_event_p, notif_stop.queue,
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remove_all_on_match_pid, &pid);
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}
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static void
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vstop_notif_reply (struct notif_event *event, char *own_buf)
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{
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struct vstop_notif *vstop = (struct vstop_notif *) event;
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prepare_resume_reply (own_buf, vstop->ptid, &vstop->status);
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}
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struct notif_server notif_stop =
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{
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"vStopped", "Stop", NULL, vstop_notif_reply,
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};
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static int
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target_running (void)
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{
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return all_threads.head != NULL;
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}
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static int
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start_inferior (char **argv)
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{
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char **new_argv = argv;
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if (wrapper_argv != NULL)
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{
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int i, count = 1;
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for (i = 0; wrapper_argv[i] != NULL; i++)
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count++;
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for (i = 0; argv[i] != NULL; i++)
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count++;
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new_argv = alloca (sizeof (char *) * count);
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count = 0;
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for (i = 0; wrapper_argv[i] != NULL; i++)
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new_argv[count++] = wrapper_argv[i];
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for (i = 0; argv[i] != NULL; i++)
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new_argv[count++] = argv[i];
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new_argv[count] = NULL;
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}
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if (debug_threads)
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{
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int i;
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for (i = 0; new_argv[i]; ++i)
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fprintf (stderr, "new_argv[%d] = \"%s\"\n", i, new_argv[i]);
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fflush (stderr);
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}
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#ifdef SIGTTOU
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signal (SIGTTOU, SIG_DFL);
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signal (SIGTTIN, SIG_DFL);
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#endif
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/* Clear this so the backend doesn't get confused, thinking
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CONT_THREAD died, and it needs to resume all threads. */
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cont_thread = null_ptid;
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signal_pid = create_inferior (new_argv[0], new_argv);
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/* FIXME: we don't actually know at this point that the create
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actually succeeded. We won't know that until we wait. */
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fprintf (stderr, "Process %s created; pid = %ld\n", argv[0],
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signal_pid);
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fflush (stderr);
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#ifdef SIGTTOU
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signal (SIGTTOU, SIG_IGN);
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signal (SIGTTIN, SIG_IGN);
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terminal_fd = fileno (stderr);
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old_foreground_pgrp = tcgetpgrp (terminal_fd);
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tcsetpgrp (terminal_fd, signal_pid);
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atexit (restore_old_foreground_pgrp);
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#endif
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if (wrapper_argv != NULL)
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{
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struct thread_resume resume_info;
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resume_info.thread = pid_to_ptid (signal_pid);
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resume_info.kind = resume_continue;
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resume_info.sig = 0;
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last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
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if (last_status.kind != TARGET_WAITKIND_STOPPED)
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return signal_pid;
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do
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{
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(*the_target->resume) (&resume_info, 1);
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last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
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if (last_status.kind != TARGET_WAITKIND_STOPPED)
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return signal_pid;
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current_inferior->last_resume_kind = resume_stop;
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current_inferior->last_status = last_status;
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}
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while (last_status.value.sig != GDB_SIGNAL_TRAP);
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return signal_pid;
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}
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/* Wait till we are at 1st instruction in program, return new pid
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(assuming success). */
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last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
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if (last_status.kind != TARGET_WAITKIND_EXITED
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&& last_status.kind != TARGET_WAITKIND_SIGNALLED)
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{
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current_inferior->last_resume_kind = resume_stop;
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current_inferior->last_status = last_status;
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}
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return signal_pid;
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}
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static int
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attach_inferior (int pid)
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{
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/* myattach should return -1 if attaching is unsupported,
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0 if it succeeded, and call error() otherwise. */
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if (myattach (pid) != 0)
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return -1;
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fprintf (stderr, "Attached; pid = %d\n", pid);
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fflush (stderr);
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/* FIXME - It may be that we should get the SIGNAL_PID from the
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attach function, so that it can be the main thread instead of
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whichever we were told to attach to. */
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signal_pid = pid;
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/* Clear this so the backend doesn't get confused, thinking
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CONT_THREAD died, and it needs to resume all threads. */
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cont_thread = null_ptid;
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if (!non_stop)
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{
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last_ptid = mywait (pid_to_ptid (pid), &last_status, 0, 0);
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/* GDB knows to ignore the first SIGSTOP after attaching to a running
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process using the "attach" command, but this is different; it's
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just using "target remote". Pretend it's just starting up. */
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if (last_status.kind == TARGET_WAITKIND_STOPPED
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&& last_status.value.sig == GDB_SIGNAL_STOP)
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last_status.value.sig = GDB_SIGNAL_TRAP;
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current_inferior->last_resume_kind = resume_stop;
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current_inferior->last_status = last_status;
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}
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return 0;
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}
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extern int remote_debug;
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/* Decode a qXfer read request. Return 0 if everything looks OK,
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or -1 otherwise. */
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static int
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decode_xfer_read (char *buf, CORE_ADDR *ofs, unsigned int *len)
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{
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/* After the read marker and annex, qXfer looks like a
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traditional 'm' packet. */
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decode_m_packet (buf, ofs, len);
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return 0;
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}
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static int
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decode_xfer (char *buf, char **object, char **rw, char **annex, char **offset)
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{
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/* Extract and NUL-terminate the object. */
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*object = buf;
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while (*buf && *buf != ':')
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buf++;
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if (*buf == '\0')
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return -1;
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*buf++ = 0;
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/* Extract and NUL-terminate the read/write action. */
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*rw = buf;
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while (*buf && *buf != ':')
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buf++;
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if (*buf == '\0')
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return -1;
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*buf++ = 0;
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/* Extract and NUL-terminate the annex. */
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*annex = buf;
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while (*buf && *buf != ':')
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buf++;
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if (*buf == '\0')
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return -1;
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*buf++ = 0;
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*offset = buf;
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return 0;
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}
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/* Write the response to a successful qXfer read. Returns the
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length of the (binary) data stored in BUF, corresponding
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to as much of DATA/LEN as we could fit. IS_MORE controls
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the first character of the response. */
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static int
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write_qxfer_response (char *buf, const void *data, int len, int is_more)
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{
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int out_len;
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if (is_more)
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buf[0] = 'm';
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else
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buf[0] = 'l';
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return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len,
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PBUFSIZ - 2) + 1;
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}
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/* Handle btrace enabling. */
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static const char *
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handle_btrace_enable (struct thread_info *thread)
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{
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if (thread->btrace != NULL)
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return "E.Btrace already enabled.";
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thread->btrace = target_enable_btrace (thread->entry.id);
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if (thread->btrace == NULL)
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return "E.Could not enable btrace.";
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return NULL;
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}
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/* Handle btrace disabling. */
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static const char *
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handle_btrace_disable (struct thread_info *thread)
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{
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if (thread->btrace == NULL)
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return "E.Branch tracing not enabled.";
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if (target_disable_btrace (thread->btrace) != 0)
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return "E.Could not disable branch tracing.";
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thread->btrace = NULL;
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return NULL;
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}
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/* Handle the "Qbtrace" packet. */
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static int
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handle_btrace_general_set (char *own_buf)
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{
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struct thread_info *thread;
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const char *err;
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char *op;
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if (strncmp ("Qbtrace:", own_buf, strlen ("Qbtrace:")) != 0)
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return 0;
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op = own_buf + strlen ("Qbtrace:");
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if (!target_supports_btrace ())
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{
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strcpy (own_buf, "E.Target does not support branch tracing.");
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return -1;
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}
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if (ptid_equal (general_thread, null_ptid)
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|| ptid_equal (general_thread, minus_one_ptid))
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{
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strcpy (own_buf, "E.Must select a single thread.");
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return -1;
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}
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thread = find_thread_ptid (general_thread);
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if (thread == NULL)
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{
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strcpy (own_buf, "E.No such thread.");
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return -1;
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}
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err = NULL;
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if (strcmp (op, "bts") == 0)
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err = handle_btrace_enable (thread);
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else if (strcmp (op, "off") == 0)
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err = handle_btrace_disable (thread);
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else
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err = "E.Bad Qbtrace operation. Use bts or off.";
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if (err != 0)
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strcpy (own_buf, err);
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else
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write_ok (own_buf);
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return 1;
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}
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/* Handle all of the extended 'Q' packets. */
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static void
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handle_general_set (char *own_buf)
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{
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if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0)
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{
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int numsigs = (int) GDB_SIGNAL_LAST, i;
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const char *p = own_buf + strlen ("QPassSignals:");
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CORE_ADDR cursig;
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p = decode_address_to_semicolon (&cursig, p);
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for (i = 0; i < numsigs; i++)
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{
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if (i == cursig)
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{
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pass_signals[i] = 1;
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if (*p == '\0')
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/* Keep looping, to clear the remaining signals. */
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cursig = -1;
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else
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p = decode_address_to_semicolon (&cursig, p);
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}
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else
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pass_signals[i] = 0;
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}
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strcpy (own_buf, "OK");
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return;
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}
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if (strncmp ("QProgramSignals:", own_buf, strlen ("QProgramSignals:")) == 0)
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{
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int numsigs = (int) GDB_SIGNAL_LAST, i;
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const char *p = own_buf + strlen ("QProgramSignals:");
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CORE_ADDR cursig;
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program_signals_p = 1;
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p = decode_address_to_semicolon (&cursig, p);
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for (i = 0; i < numsigs; i++)
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{
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if (i == cursig)
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{
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program_signals[i] = 1;
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if (*p == '\0')
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/* Keep looping, to clear the remaining signals. */
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cursig = -1;
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else
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p = decode_address_to_semicolon (&cursig, p);
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}
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else
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program_signals[i] = 0;
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}
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strcpy (own_buf, "OK");
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return;
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}
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if (strcmp (own_buf, "QStartNoAckMode") == 0)
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{
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if (remote_debug)
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{
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fprintf (stderr, "[noack mode enabled]\n");
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fflush (stderr);
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}
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noack_mode = 1;
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write_ok (own_buf);
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return;
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}
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if (strncmp (own_buf, "QNonStop:", 9) == 0)
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{
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char *mode = own_buf + 9;
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int req = -1;
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char *req_str;
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if (strcmp (mode, "0") == 0)
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|
req = 0;
|
|
else if (strcmp (mode, "1") == 0)
|
|
req = 1;
|
|
else
|
|
{
|
|
/* We don't know what this mode is, so complain to
|
|
GDB. */
|
|
fprintf (stderr, "Unknown non-stop mode requested: %s\n",
|
|
own_buf);
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
req_str = req ? "non-stop" : "all-stop";
|
|
if (start_non_stop (req) != 0)
|
|
{
|
|
fprintf (stderr, "Setting %s mode failed\n", req_str);
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
non_stop = req;
|
|
|
|
if (remote_debug)
|
|
fprintf (stderr, "[%s mode enabled]\n", req_str);
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (strncmp ("QDisableRandomization:", own_buf,
|
|
strlen ("QDisableRandomization:")) == 0)
|
|
{
|
|
char *packet = own_buf + strlen ("QDisableRandomization:");
|
|
ULONGEST setting;
|
|
|
|
unpack_varlen_hex (packet, &setting);
|
|
disable_randomization = setting;
|
|
|
|
if (remote_debug)
|
|
{
|
|
if (disable_randomization)
|
|
fprintf (stderr, "[address space randomization disabled]\n");
|
|
else
|
|
fprintf (stderr, "[address space randomization enabled]\n");
|
|
}
|
|
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (target_supports_tracepoints ()
|
|
&& handle_tracepoint_general_set (own_buf))
|
|
return;
|
|
|
|
if (strncmp ("QAgent:", own_buf, strlen ("QAgent:")) == 0)
|
|
{
|
|
char *mode = own_buf + strlen ("QAgent:");
|
|
int req = 0;
|
|
|
|
if (strcmp (mode, "0") == 0)
|
|
req = 0;
|
|
else if (strcmp (mode, "1") == 0)
|
|
req = 1;
|
|
else
|
|
{
|
|
/* We don't know what this value is, so complain to GDB. */
|
|
sprintf (own_buf, "E.Unknown QAgent value");
|
|
return;
|
|
}
|
|
|
|
/* Update the flag. */
|
|
use_agent = req;
|
|
if (remote_debug)
|
|
fprintf (stderr, "[%s agent]\n", req ? "Enable" : "Disable");
|
|
write_ok (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (handle_btrace_general_set (own_buf))
|
|
return;
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
}
|
|
|
|
static const char *
|
|
get_features_xml (const char *annex)
|
|
{
|
|
const struct target_desc *desc = current_target_desc ();
|
|
|
|
/* `desc->xmltarget' defines what to return when looking for the
|
|
"target.xml" file. Its contents can either be verbatim XML code
|
|
(prefixed with a '@') or else the name of the actual XML file to
|
|
be used in place of "target.xml".
|
|
|
|
This variable is set up from the auto-generated
|
|
init_registers_... routine for the current target. */
|
|
|
|
if (desc->xmltarget != NULL && strcmp (annex, "target.xml") == 0)
|
|
{
|
|
if (*desc->xmltarget == '@')
|
|
return desc->xmltarget + 1;
|
|
else
|
|
annex = desc->xmltarget;
|
|
}
|
|
|
|
#ifdef USE_XML
|
|
{
|
|
extern const char *const xml_builtin[][2];
|
|
int i;
|
|
|
|
/* Look for the annex. */
|
|
for (i = 0; xml_builtin[i][0] != NULL; i++)
|
|
if (strcmp (annex, xml_builtin[i][0]) == 0)
|
|
break;
|
|
|
|
if (xml_builtin[i][0] != NULL)
|
|
return xml_builtin[i][1];
|
|
}
|
|
#endif
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
monitor_show_help (void)
|
|
{
|
|
monitor_output ("The following monitor commands are supported:\n");
|
|
monitor_output (" set debug <0|1>\n");
|
|
monitor_output (" Enable general debugging messages\n");
|
|
monitor_output (" set debug-hw-points <0|1>\n");
|
|
monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
|
|
monitor_output (" set remote-debug <0|1>\n");
|
|
monitor_output (" Enable remote protocol debugging messages\n");
|
|
monitor_output (" exit\n");
|
|
monitor_output (" Quit GDBserver\n");
|
|
}
|
|
|
|
/* Read trace frame or inferior memory. Returns the number of bytes
|
|
actually read, zero when no further transfer is possible, and -1 on
|
|
error. Return of a positive value smaller than LEN does not
|
|
indicate there's no more to be read, only the end of the transfer.
|
|
E.g., when GDB reads memory from a traceframe, a first request may
|
|
be served from a memory block that does not cover the whole request
|
|
length. A following request gets the rest served from either
|
|
another block (of the same traceframe) or from the read-only
|
|
regions. */
|
|
|
|
static int
|
|
gdb_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
|
|
{
|
|
int res;
|
|
|
|
if (current_traceframe >= 0)
|
|
{
|
|
ULONGEST nbytes;
|
|
ULONGEST length = len;
|
|
|
|
if (traceframe_read_mem (current_traceframe,
|
|
memaddr, myaddr, len, &nbytes))
|
|
return EIO;
|
|
/* Data read from trace buffer, we're done. */
|
|
if (nbytes > 0)
|
|
return nbytes;
|
|
if (!in_readonly_region (memaddr, length))
|
|
return -1;
|
|
/* Otherwise we have a valid readonly case, fall through. */
|
|
/* (assume no half-trace half-real blocks for now) */
|
|
}
|
|
|
|
res = prepare_to_access_memory ();
|
|
if (res == 0)
|
|
{
|
|
res = read_inferior_memory (memaddr, myaddr, len);
|
|
done_accessing_memory ();
|
|
|
|
return res == 0 ? len : -1;
|
|
}
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
/* Write trace frame or inferior memory. Actually, writing to trace
|
|
frames is forbidden. */
|
|
|
|
static int
|
|
gdb_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
|
|
{
|
|
if (current_traceframe >= 0)
|
|
return EIO;
|
|
else
|
|
{
|
|
int ret;
|
|
|
|
ret = prepare_to_access_memory ();
|
|
if (ret == 0)
|
|
{
|
|
ret = write_inferior_memory (memaddr, myaddr, len);
|
|
done_accessing_memory ();
|
|
}
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Subroutine of handle_search_memory to simplify it. */
|
|
|
|
static int
|
|
handle_search_memory_1 (CORE_ADDR start_addr, CORE_ADDR search_space_len,
|
|
gdb_byte *pattern, unsigned pattern_len,
|
|
gdb_byte *search_buf,
|
|
unsigned chunk_size, unsigned search_buf_size,
|
|
CORE_ADDR *found_addrp)
|
|
{
|
|
/* Prime the search buffer. */
|
|
|
|
if (gdb_read_memory (start_addr, search_buf, search_buf_size)
|
|
!= search_buf_size)
|
|
{
|
|
warning ("Unable to access %ld bytes of target "
|
|
"memory at 0x%lx, halting search.",
|
|
(long) search_buf_size, (long) start_addr);
|
|
return -1;
|
|
}
|
|
|
|
/* Perform the search.
|
|
|
|
The loop is kept simple by allocating [N + pattern-length - 1] bytes.
|
|
When we've scanned N bytes we copy the trailing bytes to the start and
|
|
read in another N bytes. */
|
|
|
|
while (search_space_len >= pattern_len)
|
|
{
|
|
gdb_byte *found_ptr;
|
|
unsigned nr_search_bytes = (search_space_len < search_buf_size
|
|
? search_space_len
|
|
: search_buf_size);
|
|
|
|
found_ptr = memmem (search_buf, nr_search_bytes, pattern, pattern_len);
|
|
|
|
if (found_ptr != NULL)
|
|
{
|
|
CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
|
|
*found_addrp = found_addr;
|
|
return 1;
|
|
}
|
|
|
|
/* Not found in this chunk, skip to next chunk. */
|
|
|
|
/* Don't let search_space_len wrap here, it's unsigned. */
|
|
if (search_space_len >= chunk_size)
|
|
search_space_len -= chunk_size;
|
|
else
|
|
search_space_len = 0;
|
|
|
|
if (search_space_len >= pattern_len)
|
|
{
|
|
unsigned keep_len = search_buf_size - chunk_size;
|
|
CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
|
|
int nr_to_read;
|
|
|
|
/* Copy the trailing part of the previous iteration to the front
|
|
of the buffer for the next iteration. */
|
|
memcpy (search_buf, search_buf + chunk_size, keep_len);
|
|
|
|
nr_to_read = (search_space_len - keep_len < chunk_size
|
|
? search_space_len - keep_len
|
|
: chunk_size);
|
|
|
|
if (gdb_read_memory (read_addr, search_buf + keep_len,
|
|
nr_to_read) != search_buf_size)
|
|
{
|
|
warning ("Unable to access %ld bytes of target memory "
|
|
"at 0x%lx, halting search.",
|
|
(long) nr_to_read, (long) read_addr);
|
|
return -1;
|
|
}
|
|
|
|
start_addr += chunk_size;
|
|
}
|
|
}
|
|
|
|
/* Not found. */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Handle qSearch:memory packets. */
|
|
|
|
static void
|
|
handle_search_memory (char *own_buf, int packet_len)
|
|
{
|
|
CORE_ADDR start_addr;
|
|
CORE_ADDR search_space_len;
|
|
gdb_byte *pattern;
|
|
unsigned int pattern_len;
|
|
/* NOTE: also defined in find.c testcase. */
|
|
#define SEARCH_CHUNK_SIZE 16000
|
|
const unsigned chunk_size = SEARCH_CHUNK_SIZE;
|
|
/* Buffer to hold memory contents for searching. */
|
|
gdb_byte *search_buf;
|
|
unsigned search_buf_size;
|
|
int found;
|
|
CORE_ADDR found_addr;
|
|
int cmd_name_len = sizeof ("qSearch:memory:") - 1;
|
|
|
|
pattern = malloc (packet_len);
|
|
if (pattern == NULL)
|
|
{
|
|
error ("Unable to allocate memory to perform the search");
|
|
strcpy (own_buf, "E00");
|
|
return;
|
|
}
|
|
if (decode_search_memory_packet (own_buf + cmd_name_len,
|
|
packet_len - cmd_name_len,
|
|
&start_addr, &search_space_len,
|
|
pattern, &pattern_len) < 0)
|
|
{
|
|
free (pattern);
|
|
error ("Error in parsing qSearch:memory packet");
|
|
strcpy (own_buf, "E00");
|
|
return;
|
|
}
|
|
|
|
search_buf_size = chunk_size + pattern_len - 1;
|
|
|
|
/* No point in trying to allocate a buffer larger than the search space. */
|
|
if (search_space_len < search_buf_size)
|
|
search_buf_size = search_space_len;
|
|
|
|
search_buf = malloc (search_buf_size);
|
|
if (search_buf == NULL)
|
|
{
|
|
free (pattern);
|
|
error ("Unable to allocate memory to perform the search");
|
|
strcpy (own_buf, "E00");
|
|
return;
|
|
}
|
|
|
|
found = handle_search_memory_1 (start_addr, search_space_len,
|
|
pattern, pattern_len,
|
|
search_buf, chunk_size, search_buf_size,
|
|
&found_addr);
|
|
|
|
if (found > 0)
|
|
sprintf (own_buf, "1,%lx", (long) found_addr);
|
|
else if (found == 0)
|
|
strcpy (own_buf, "0");
|
|
else
|
|
strcpy (own_buf, "E00");
|
|
|
|
free (search_buf);
|
|
free (pattern);
|
|
}
|
|
|
|
#define require_running(BUF) \
|
|
if (!target_running ()) \
|
|
{ \
|
|
write_enn (BUF); \
|
|
return; \
|
|
}
|
|
|
|
/* Handle monitor commands not handled by target-specific handlers. */
|
|
|
|
static void
|
|
handle_monitor_command (char *mon, char *own_buf)
|
|
{
|
|
if (strcmp (mon, "set debug 1") == 0)
|
|
{
|
|
debug_threads = 1;
|
|
monitor_output ("Debug output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set debug 0") == 0)
|
|
{
|
|
debug_threads = 0;
|
|
monitor_output ("Debug output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set debug-hw-points 1") == 0)
|
|
{
|
|
debug_hw_points = 1;
|
|
monitor_output ("H/W point debugging output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set debug-hw-points 0") == 0)
|
|
{
|
|
debug_hw_points = 0;
|
|
monitor_output ("H/W point debugging output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set remote-debug 1") == 0)
|
|
{
|
|
remote_debug = 1;
|
|
monitor_output ("Protocol debug output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set remote-debug 0") == 0)
|
|
{
|
|
remote_debug = 0;
|
|
monitor_output ("Protocol debug output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "help") == 0)
|
|
monitor_show_help ();
|
|
else if (strcmp (mon, "exit") == 0)
|
|
exit_requested = 1;
|
|
else
|
|
{
|
|
monitor_output ("Unknown monitor command.\n\n");
|
|
monitor_show_help ();
|
|
write_enn (own_buf);
|
|
}
|
|
}
|
|
|
|
/* Associates a callback with each supported qXfer'able object. */
|
|
|
|
struct qxfer
|
|
{
|
|
/* The object this handler handles. */
|
|
const char *object;
|
|
|
|
/* Request that the target transfer up to LEN 8-bit bytes of the
|
|
target's OBJECT. The OFFSET, for a seekable object, specifies
|
|
the starting point. The ANNEX can be used to provide additional
|
|
data-specific information to the target.
|
|
|
|
Return the number of bytes actually transfered, zero when no
|
|
further transfer is possible, -1 on error, -2 when the transfer
|
|
is not supported, and -3 on a verbose error message that should
|
|
be preserved. Return of a positive value smaller than LEN does
|
|
not indicate the end of the object, only the end of the transfer.
|
|
|
|
One, and only one, of readbuf or writebuf must be non-NULL. */
|
|
int (*xfer) (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len);
|
|
};
|
|
|
|
/* Handle qXfer:auxv:read. */
|
|
|
|
static int
|
|
handle_qxfer_auxv (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (the_target->read_auxv == NULL || writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || !target_running ())
|
|
return -1;
|
|
|
|
return (*the_target->read_auxv) (offset, readbuf, len);
|
|
}
|
|
|
|
/* Handle qXfer:features:read. */
|
|
|
|
static int
|
|
handle_qxfer_features (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
const char *document;
|
|
size_t total_len;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (!target_running ())
|
|
return -1;
|
|
|
|
/* Grab the correct annex. */
|
|
document = get_features_xml (annex);
|
|
if (document == NULL)
|
|
return -1;
|
|
|
|
total_len = strlen (document);
|
|
|
|
if (offset > total_len)
|
|
return -1;
|
|
|
|
if (offset + len > total_len)
|
|
len = total_len - offset;
|
|
|
|
memcpy (readbuf, document + offset, len);
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:libraries:read. */
|
|
|
|
static int
|
|
handle_qxfer_libraries (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
unsigned int total_len;
|
|
char *document, *p;
|
|
struct inferior_list_entry *dll_ptr;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || !target_running ())
|
|
return -1;
|
|
|
|
/* Over-estimate the necessary memory. Assume that every character
|
|
in the library name must be escaped. */
|
|
total_len = 64;
|
|
for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
|
|
total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name);
|
|
|
|
document = malloc (total_len);
|
|
if (document == NULL)
|
|
return -1;
|
|
|
|
strcpy (document, "<library-list>\n");
|
|
p = document + strlen (document);
|
|
|
|
for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
|
|
{
|
|
struct dll_info *dll = (struct dll_info *) dll_ptr;
|
|
char *name;
|
|
|
|
strcpy (p, " <library name=\"");
|
|
p = p + strlen (p);
|
|
name = xml_escape_text (dll->name);
|
|
strcpy (p, name);
|
|
free (name);
|
|
p = p + strlen (p);
|
|
strcpy (p, "\"><segment address=\"");
|
|
p = p + strlen (p);
|
|
sprintf (p, "0x%lx", (long) dll->base_addr);
|
|
p = p + strlen (p);
|
|
strcpy (p, "\"/></library>\n");
|
|
p = p + strlen (p);
|
|
}
|
|
|
|
strcpy (p, "</library-list>\n");
|
|
|
|
total_len = strlen (document);
|
|
|
|
if (offset > total_len)
|
|
{
|
|
free (document);
|
|
return -1;
|
|
}
|
|
|
|
if (offset + len > total_len)
|
|
len = total_len - offset;
|
|
|
|
memcpy (readbuf, document + offset, len);
|
|
free (document);
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:libraries-svr4:read. */
|
|
|
|
static int
|
|
handle_qxfer_libraries_svr4 (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (!target_running () || the_target->qxfer_libraries_svr4 == NULL)
|
|
return -1;
|
|
|
|
return the_target->qxfer_libraries_svr4 (annex, readbuf, writebuf, offset, len);
|
|
}
|
|
|
|
/* Handle qXfer:osadata:read. */
|
|
|
|
static int
|
|
handle_qxfer_osdata (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (the_target->qxfer_osdata == NULL || writebuf != NULL)
|
|
return -2;
|
|
|
|
return (*the_target->qxfer_osdata) (annex, readbuf, NULL, offset, len);
|
|
}
|
|
|
|
/* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
|
|
|
|
static int
|
|
handle_qxfer_siginfo (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (the_target->qxfer_siginfo == NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || !target_running ())
|
|
return -1;
|
|
|
|
return (*the_target->qxfer_siginfo) (annex, readbuf, writebuf, offset, len);
|
|
}
|
|
|
|
/* Handle qXfer:spu:read and qXfer:spu:write. */
|
|
|
|
static int
|
|
handle_qxfer_spu (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (the_target->qxfer_spu == NULL)
|
|
return -2;
|
|
|
|
if (!target_running ())
|
|
return -1;
|
|
|
|
return (*the_target->qxfer_spu) (annex, readbuf, writebuf, offset, len);
|
|
}
|
|
|
|
/* Handle qXfer:statictrace:read. */
|
|
|
|
static int
|
|
handle_qxfer_statictrace (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
ULONGEST nbytes;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (annex[0] != '\0' || !target_running () || current_traceframe == -1)
|
|
return -1;
|
|
|
|
if (traceframe_read_sdata (current_traceframe, offset,
|
|
readbuf, len, &nbytes))
|
|
return -1;
|
|
return nbytes;
|
|
}
|
|
|
|
/* Helper for handle_qxfer_threads. */
|
|
|
|
static void
|
|
handle_qxfer_threads_proper (struct buffer *buffer)
|
|
{
|
|
struct inferior_list_entry *thread;
|
|
|
|
buffer_grow_str (buffer, "<threads>\n");
|
|
|
|
for (thread = all_threads.head; thread; thread = thread->next)
|
|
{
|
|
ptid_t ptid = thread_to_gdb_id ((struct thread_info *)thread);
|
|
char ptid_s[100];
|
|
int core = target_core_of_thread (ptid);
|
|
char core_s[21];
|
|
|
|
write_ptid (ptid_s, ptid);
|
|
|
|
if (core != -1)
|
|
{
|
|
sprintf (core_s, "%d", core);
|
|
buffer_xml_printf (buffer, "<thread id=\"%s\" core=\"%s\"/>\n",
|
|
ptid_s, core_s);
|
|
}
|
|
else
|
|
{
|
|
buffer_xml_printf (buffer, "<thread id=\"%s\"/>\n",
|
|
ptid_s);
|
|
}
|
|
}
|
|
|
|
buffer_grow_str0 (buffer, "</threads>\n");
|
|
}
|
|
|
|
/* Handle qXfer:threads:read. */
|
|
|
|
static int
|
|
handle_qxfer_threads (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
static char *result = 0;
|
|
static unsigned int result_length = 0;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (!target_running () || annex[0] != '\0')
|
|
return -1;
|
|
|
|
if (offset == 0)
|
|
{
|
|
struct buffer buffer;
|
|
/* When asked for data at offset 0, generate everything and store into
|
|
'result'. Successive reads will be served off 'result'. */
|
|
if (result)
|
|
free (result);
|
|
|
|
buffer_init (&buffer);
|
|
|
|
handle_qxfer_threads_proper (&buffer);
|
|
|
|
result = buffer_finish (&buffer);
|
|
result_length = strlen (result);
|
|
buffer_free (&buffer);
|
|
}
|
|
|
|
if (offset >= result_length)
|
|
{
|
|
/* We're out of data. */
|
|
free (result);
|
|
result = NULL;
|
|
result_length = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (len > result_length - offset)
|
|
len = result_length - offset;
|
|
|
|
memcpy (readbuf, result + offset, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:traceframe-info:read. */
|
|
|
|
static int
|
|
handle_qxfer_traceframe_info (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
static char *result = 0;
|
|
static unsigned int result_length = 0;
|
|
|
|
if (writebuf != NULL)
|
|
return -2;
|
|
|
|
if (!target_running () || annex[0] != '\0' || current_traceframe == -1)
|
|
return -1;
|
|
|
|
if (offset == 0)
|
|
{
|
|
struct buffer buffer;
|
|
|
|
/* When asked for data at offset 0, generate everything and
|
|
store into 'result'. Successive reads will be served off
|
|
'result'. */
|
|
free (result);
|
|
|
|
buffer_init (&buffer);
|
|
|
|
traceframe_read_info (current_traceframe, &buffer);
|
|
|
|
result = buffer_finish (&buffer);
|
|
result_length = strlen (result);
|
|
buffer_free (&buffer);
|
|
}
|
|
|
|
if (offset >= result_length)
|
|
{
|
|
/* We're out of data. */
|
|
free (result);
|
|
result = NULL;
|
|
result_length = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (len > result_length - offset)
|
|
len = result_length - offset;
|
|
|
|
memcpy (readbuf, result + offset, len);
|
|
return len;
|
|
}
|
|
|
|
/* Handle qXfer:fdpic:read. */
|
|
|
|
static int
|
|
handle_qxfer_fdpic (const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
|
|
{
|
|
if (the_target->read_loadmap == NULL)
|
|
return -2;
|
|
|
|
if (!target_running ())
|
|
return -1;
|
|
|
|
return (*the_target->read_loadmap) (annex, offset, readbuf, len);
|
|
}
|
|
|
|
/* Handle qXfer:btrace:read. */
|
|
|
|
static int
|
|
handle_qxfer_btrace (const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
static struct buffer cache;
|
|
struct thread_info *thread;
|
|
int type;
|
|
|
|
if (the_target->read_btrace == NULL || writebuf != NULL)
|
|
return -2;
|
|
|
|
if (!target_running ())
|
|
return -1;
|
|
|
|
if (ptid_equal (general_thread, null_ptid)
|
|
|| ptid_equal (general_thread, minus_one_ptid))
|
|
{
|
|
strcpy (own_buf, "E.Must select a single thread.");
|
|
return -3;
|
|
}
|
|
|
|
thread = find_thread_ptid (general_thread);
|
|
if (thread == NULL)
|
|
{
|
|
strcpy (own_buf, "E.No such thread.");
|
|
return -3;
|
|
}
|
|
|
|
if (thread->btrace == NULL)
|
|
{
|
|
strcpy (own_buf, "E.Btrace not enabled.");
|
|
return -3;
|
|
}
|
|
|
|
if (strcmp (annex, "all") == 0)
|
|
type = btrace_read_all;
|
|
else if (strcmp (annex, "new") == 0)
|
|
type = btrace_read_new;
|
|
else
|
|
{
|
|
strcpy (own_buf, "E.Bad annex.");
|
|
return -3;
|
|
}
|
|
|
|
if (offset == 0)
|
|
{
|
|
buffer_free (&cache);
|
|
|
|
target_read_btrace (thread->btrace, &cache, type);
|
|
}
|
|
else if (offset > cache.used_size)
|
|
{
|
|
buffer_free (&cache);
|
|
return -3;
|
|
}
|
|
|
|
if (len > cache.used_size - offset)
|
|
len = cache.used_size - offset;
|
|
|
|
memcpy (readbuf, cache.buffer + offset, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
static const struct qxfer qxfer_packets[] =
|
|
{
|
|
{ "auxv", handle_qxfer_auxv },
|
|
{ "btrace", handle_qxfer_btrace },
|
|
{ "fdpic", handle_qxfer_fdpic},
|
|
{ "features", handle_qxfer_features },
|
|
{ "libraries", handle_qxfer_libraries },
|
|
{ "libraries-svr4", handle_qxfer_libraries_svr4 },
|
|
{ "osdata", handle_qxfer_osdata },
|
|
{ "siginfo", handle_qxfer_siginfo },
|
|
{ "spu", handle_qxfer_spu },
|
|
{ "statictrace", handle_qxfer_statictrace },
|
|
{ "threads", handle_qxfer_threads },
|
|
{ "traceframe-info", handle_qxfer_traceframe_info },
|
|
};
|
|
|
|
static int
|
|
handle_qxfer (char *own_buf, int packet_len, int *new_packet_len_p)
|
|
{
|
|
int i;
|
|
char *object;
|
|
char *rw;
|
|
char *annex;
|
|
char *offset;
|
|
|
|
if (strncmp (own_buf, "qXfer:", 6) != 0)
|
|
return 0;
|
|
|
|
/* Grab the object, r/w and annex. */
|
|
if (decode_xfer (own_buf + 6, &object, &rw, &annex, &offset) < 0)
|
|
{
|
|
write_enn (own_buf);
|
|
return 1;
|
|
}
|
|
|
|
for (i = 0;
|
|
i < sizeof (qxfer_packets) / sizeof (qxfer_packets[0]);
|
|
i++)
|
|
{
|
|
const struct qxfer *q = &qxfer_packets[i];
|
|
|
|
if (strcmp (object, q->object) == 0)
|
|
{
|
|
if (strcmp (rw, "read") == 0)
|
|
{
|
|
unsigned char *data;
|
|
int n;
|
|
CORE_ADDR ofs;
|
|
unsigned int len;
|
|
|
|
/* Grab the offset and length. */
|
|
if (decode_xfer_read (offset, &ofs, &len) < 0)
|
|
{
|
|
write_enn (own_buf);
|
|
return 1;
|
|
}
|
|
|
|
/* Read one extra byte, as an indicator of whether there is
|
|
more. */
|
|
if (len > PBUFSIZ - 2)
|
|
len = PBUFSIZ - 2;
|
|
data = malloc (len + 1);
|
|
if (data == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return 1;
|
|
}
|
|
n = (*q->xfer) (annex, data, NULL, ofs, len + 1);
|
|
if (n == -2)
|
|
{
|
|
free (data);
|
|
return 0;
|
|
}
|
|
else if (n == -3)
|
|
{
|
|
/* Preserve error message. */
|
|
}
|
|
else if (n < 0)
|
|
write_enn (own_buf);
|
|
else if (n > len)
|
|
*new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
|
|
else
|
|
*new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
|
|
|
|
free (data);
|
|
return 1;
|
|
}
|
|
else if (strcmp (rw, "write") == 0)
|
|
{
|
|
int n;
|
|
unsigned int len;
|
|
CORE_ADDR ofs;
|
|
unsigned char *data;
|
|
|
|
strcpy (own_buf, "E00");
|
|
data = malloc (packet_len - (offset - own_buf));
|
|
if (data == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return 1;
|
|
}
|
|
if (decode_xfer_write (offset, packet_len - (offset - own_buf),
|
|
&ofs, &len, data) < 0)
|
|
{
|
|
free (data);
|
|
write_enn (own_buf);
|
|
return 1;
|
|
}
|
|
|
|
n = (*q->xfer) (annex, NULL, data, ofs, len);
|
|
if (n == -2)
|
|
{
|
|
free (data);
|
|
return 0;
|
|
}
|
|
else if (n == -3)
|
|
{
|
|
/* Preserve error message. */
|
|
}
|
|
else if (n < 0)
|
|
write_enn (own_buf);
|
|
else
|
|
sprintf (own_buf, "%x", n);
|
|
|
|
free (data);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Table used by the crc32 function to calcuate the checksum. */
|
|
|
|
static unsigned int crc32_table[256] =
|
|
{0, 0};
|
|
|
|
/* Compute 32 bit CRC from inferior memory.
|
|
|
|
On success, return 32 bit CRC.
|
|
On failure, return (unsigned long long) -1. */
|
|
|
|
static unsigned long long
|
|
crc32 (CORE_ADDR base, 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--)
|
|
{
|
|
unsigned char byte = 0;
|
|
|
|
/* Return failure if memory read fails. */
|
|
if (read_inferior_memory (base, &byte, 1) != 0)
|
|
return (unsigned long long) -1;
|
|
|
|
crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ byte) & 255];
|
|
base++;
|
|
}
|
|
return (unsigned long long) crc;
|
|
}
|
|
|
|
/* Handle all of the extended 'q' packets. */
|
|
|
|
void
|
|
handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
|
|
{
|
|
static struct inferior_list_entry *thread_ptr;
|
|
|
|
/* Reply the current thread id. */
|
|
if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
|
|
{
|
|
ptid_t gdb_id;
|
|
require_running (own_buf);
|
|
|
|
if (!ptid_equal (general_thread, null_ptid)
|
|
&& !ptid_equal (general_thread, minus_one_ptid))
|
|
gdb_id = general_thread;
|
|
else
|
|
{
|
|
thread_ptr = all_threads.head;
|
|
gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
|
|
}
|
|
|
|
sprintf (own_buf, "QC");
|
|
own_buf += 2;
|
|
write_ptid (own_buf, gdb_id);
|
|
return;
|
|
}
|
|
|
|
if (strcmp ("qSymbol::", own_buf) == 0)
|
|
{
|
|
/* GDB is suggesting new symbols have been loaded. This may
|
|
mean a new shared library has been detected as loaded, so
|
|
take the opportunity to check if breakpoints we think are
|
|
inserted, still are. Note that it isn't guaranteed that
|
|
we'll see this when a shared library is loaded, and nor will
|
|
we see this for unloads (although breakpoints in unloaded
|
|
libraries shouldn't trigger), as GDB may not find symbols for
|
|
the library at all. We also re-validate breakpoints when we
|
|
see a second GDB breakpoint for the same address, and or when
|
|
we access breakpoint shadows. */
|
|
validate_breakpoints ();
|
|
|
|
if (target_supports_tracepoints ())
|
|
tracepoint_look_up_symbols ();
|
|
|
|
if (target_running () && the_target->look_up_symbols != NULL)
|
|
(*the_target->look_up_symbols) ();
|
|
|
|
strcpy (own_buf, "OK");
|
|
return;
|
|
}
|
|
|
|
if (!disable_packet_qfThreadInfo)
|
|
{
|
|
if (strcmp ("qfThreadInfo", own_buf) == 0)
|
|
{
|
|
ptid_t gdb_id;
|
|
|
|
require_running (own_buf);
|
|
thread_ptr = all_threads.head;
|
|
|
|
*own_buf++ = 'm';
|
|
gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
|
|
write_ptid (own_buf, gdb_id);
|
|
thread_ptr = thread_ptr->next;
|
|
return;
|
|
}
|
|
|
|
if (strcmp ("qsThreadInfo", own_buf) == 0)
|
|
{
|
|
ptid_t gdb_id;
|
|
|
|
require_running (own_buf);
|
|
if (thread_ptr != NULL)
|
|
{
|
|
*own_buf++ = 'm';
|
|
gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
|
|
write_ptid (own_buf, gdb_id);
|
|
thread_ptr = thread_ptr->next;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
sprintf (own_buf, "l");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (the_target->read_offsets != NULL
|
|
&& strcmp ("qOffsets", own_buf) == 0)
|
|
{
|
|
CORE_ADDR text, data;
|
|
|
|
require_running (own_buf);
|
|
if (the_target->read_offsets (&text, &data))
|
|
sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX",
|
|
(long)text, (long)data, (long)data);
|
|
else
|
|
write_enn (own_buf);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Protocol features query. */
|
|
if (strncmp ("qSupported", own_buf, 10) == 0
|
|
&& (own_buf[10] == ':' || own_buf[10] == '\0'))
|
|
{
|
|
char *p = &own_buf[10];
|
|
int gdb_supports_qRelocInsn = 0;
|
|
|
|
/* Start processing qSupported packet. */
|
|
target_process_qsupported (NULL);
|
|
|
|
/* Process each feature being provided by GDB. The first
|
|
feature will follow a ':', and latter features will follow
|
|
';'. */
|
|
if (*p == ':')
|
|
{
|
|
char **qsupported = NULL;
|
|
int count = 0;
|
|
int i;
|
|
|
|
/* Two passes, to avoid nested strtok calls in
|
|
target_process_qsupported. */
|
|
for (p = strtok (p + 1, ";");
|
|
p != NULL;
|
|
p = strtok (NULL, ";"))
|
|
{
|
|
count++;
|
|
qsupported = xrealloc (qsupported, count * sizeof (char *));
|
|
qsupported[count - 1] = xstrdup (p);
|
|
}
|
|
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
p = qsupported[i];
|
|
if (strcmp (p, "multiprocess+") == 0)
|
|
{
|
|
/* GDB supports and wants multi-process support if
|
|
possible. */
|
|
if (target_supports_multi_process ())
|
|
multi_process = 1;
|
|
}
|
|
else if (strcmp (p, "qRelocInsn+") == 0)
|
|
{
|
|
/* GDB supports relocate instruction requests. */
|
|
gdb_supports_qRelocInsn = 1;
|
|
}
|
|
else
|
|
target_process_qsupported (p);
|
|
|
|
free (p);
|
|
}
|
|
|
|
free (qsupported);
|
|
}
|
|
|
|
sprintf (own_buf,
|
|
"PacketSize=%x;QPassSignals+;QProgramSignals+",
|
|
PBUFSIZ - 1);
|
|
|
|
if (the_target->qxfer_libraries_svr4 != NULL)
|
|
strcat (own_buf, ";qXfer:libraries-svr4:read+"
|
|
";augmented-libraries-svr4-read+");
|
|
else
|
|
{
|
|
/* We do not have any hook to indicate whether the non-SVR4 target
|
|
backend supports qXfer:libraries:read, so always report it. */
|
|
strcat (own_buf, ";qXfer:libraries:read+");
|
|
}
|
|
|
|
if (the_target->read_auxv != NULL)
|
|
strcat (own_buf, ";qXfer:auxv:read+");
|
|
|
|
if (the_target->qxfer_spu != NULL)
|
|
strcat (own_buf, ";qXfer:spu:read+;qXfer:spu:write+");
|
|
|
|
if (the_target->qxfer_siginfo != NULL)
|
|
strcat (own_buf, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
|
|
|
|
if (the_target->read_loadmap != NULL)
|
|
strcat (own_buf, ";qXfer:fdpic:read+");
|
|
|
|
/* We always report qXfer:features:read, as targets may
|
|
install XML files on a subsequent call to arch_setup.
|
|
If we reported to GDB on startup that we don't support
|
|
qXfer:feature:read at all, we will never be re-queried. */
|
|
strcat (own_buf, ";qXfer:features:read+");
|
|
|
|
if (transport_is_reliable)
|
|
strcat (own_buf, ";QStartNoAckMode+");
|
|
|
|
if (the_target->qxfer_osdata != NULL)
|
|
strcat (own_buf, ";qXfer:osdata:read+");
|
|
|
|
if (target_supports_multi_process ())
|
|
strcat (own_buf, ";multiprocess+");
|
|
|
|
if (target_supports_non_stop ())
|
|
strcat (own_buf, ";QNonStop+");
|
|
|
|
if (target_supports_disable_randomization ())
|
|
strcat (own_buf, ";QDisableRandomization+");
|
|
|
|
strcat (own_buf, ";qXfer:threads:read+");
|
|
|
|
if (target_supports_tracepoints ())
|
|
{
|
|
strcat (own_buf, ";ConditionalTracepoints+");
|
|
strcat (own_buf, ";TraceStateVariables+");
|
|
strcat (own_buf, ";TracepointSource+");
|
|
strcat (own_buf, ";DisconnectedTracing+");
|
|
if (gdb_supports_qRelocInsn && target_supports_fast_tracepoints ())
|
|
strcat (own_buf, ";FastTracepoints+");
|
|
strcat (own_buf, ";StaticTracepoints+");
|
|
strcat (own_buf, ";InstallInTrace+");
|
|
strcat (own_buf, ";qXfer:statictrace:read+");
|
|
strcat (own_buf, ";qXfer:traceframe-info:read+");
|
|
strcat (own_buf, ";EnableDisableTracepoints+");
|
|
strcat (own_buf, ";QTBuffer:size+");
|
|
strcat (own_buf, ";tracenz+");
|
|
}
|
|
|
|
/* Support target-side breakpoint conditions and commands. */
|
|
strcat (own_buf, ";ConditionalBreakpoints+");
|
|
strcat (own_buf, ";BreakpointCommands+");
|
|
|
|
if (target_supports_agent ())
|
|
strcat (own_buf, ";QAgent+");
|
|
|
|
if (target_supports_btrace ())
|
|
{
|
|
strcat (own_buf, ";Qbtrace:bts+");
|
|
strcat (own_buf, ";Qbtrace:off+");
|
|
strcat (own_buf, ";qXfer:btrace:read+");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* Thread-local storage support. */
|
|
if (the_target->get_tls_address != NULL
|
|
&& strncmp ("qGetTLSAddr:", own_buf, 12) == 0)
|
|
{
|
|
char *p = own_buf + 12;
|
|
CORE_ADDR parts[2], address = 0;
|
|
int i, err;
|
|
ptid_t ptid = null_ptid;
|
|
|
|
require_running (own_buf);
|
|
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
char *p2;
|
|
int len;
|
|
|
|
if (p == NULL)
|
|
break;
|
|
|
|
p2 = strchr (p, ',');
|
|
if (p2)
|
|
{
|
|
len = p2 - p;
|
|
p2++;
|
|
}
|
|
else
|
|
{
|
|
len = strlen (p);
|
|
p2 = NULL;
|
|
}
|
|
|
|
if (i == 0)
|
|
ptid = read_ptid (p, NULL);
|
|
else
|
|
decode_address (&parts[i - 1], p, len);
|
|
p = p2;
|
|
}
|
|
|
|
if (p != NULL || i < 3)
|
|
err = 1;
|
|
else
|
|
{
|
|
struct thread_info *thread = find_thread_ptid (ptid);
|
|
|
|
if (thread == NULL)
|
|
err = 2;
|
|
else
|
|
err = the_target->get_tls_address (thread, parts[0], parts[1],
|
|
&address);
|
|
}
|
|
|
|
if (err == 0)
|
|
{
|
|
strcpy (own_buf, paddress(address));
|
|
return;
|
|
}
|
|
else if (err > 0)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
/* Otherwise, pretend we do not understand this packet. */
|
|
}
|
|
|
|
/* Windows OS Thread Information Block address support. */
|
|
if (the_target->get_tib_address != NULL
|
|
&& strncmp ("qGetTIBAddr:", own_buf, 12) == 0)
|
|
{
|
|
char *annex;
|
|
int n;
|
|
CORE_ADDR tlb;
|
|
ptid_t ptid = read_ptid (own_buf + 12, &annex);
|
|
|
|
n = (*the_target->get_tib_address) (ptid, &tlb);
|
|
if (n == 1)
|
|
{
|
|
strcpy (own_buf, paddress(tlb));
|
|
return;
|
|
}
|
|
else if (n == 0)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Handle "monitor" commands. */
|
|
if (strncmp ("qRcmd,", own_buf, 6) == 0)
|
|
{
|
|
char *mon = malloc (PBUFSIZ);
|
|
int len = strlen (own_buf + 6);
|
|
|
|
if (mon == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
if ((len % 2) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2)
|
|
{
|
|
write_enn (own_buf);
|
|
free (mon);
|
|
return;
|
|
}
|
|
mon[len / 2] = '\0';
|
|
|
|
write_ok (own_buf);
|
|
|
|
if (the_target->handle_monitor_command == NULL
|
|
|| (*the_target->handle_monitor_command) (mon) == 0)
|
|
/* Default processing. */
|
|
handle_monitor_command (mon, own_buf);
|
|
|
|
free (mon);
|
|
return;
|
|
}
|
|
|
|
if (strncmp ("qSearch:memory:", own_buf,
|
|
sizeof ("qSearch:memory:") - 1) == 0)
|
|
{
|
|
require_running (own_buf);
|
|
handle_search_memory (own_buf, packet_len);
|
|
return;
|
|
}
|
|
|
|
if (strcmp (own_buf, "qAttached") == 0
|
|
|| strncmp (own_buf, "qAttached:", sizeof ("qAttached:") - 1) == 0)
|
|
{
|
|
struct process_info *process;
|
|
|
|
if (own_buf[sizeof ("qAttached") - 1])
|
|
{
|
|
int pid = strtoul (own_buf + sizeof ("qAttached:") - 1, NULL, 16);
|
|
process = (struct process_info *)
|
|
find_inferior_id (&all_processes, pid_to_ptid (pid));
|
|
}
|
|
else
|
|
{
|
|
require_running (own_buf);
|
|
process = current_process ();
|
|
}
|
|
|
|
if (process == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
strcpy (own_buf, process->attached ? "1" : "0");
|
|
return;
|
|
}
|
|
|
|
if (strncmp ("qCRC:", own_buf, 5) == 0)
|
|
{
|
|
/* CRC check (compare-section). */
|
|
char *comma;
|
|
ULONGEST base;
|
|
int len;
|
|
unsigned long long crc;
|
|
|
|
require_running (own_buf);
|
|
comma = unpack_varlen_hex (own_buf + 5, &base);
|
|
if (*comma++ != ',')
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
len = strtoul (comma, NULL, 16);
|
|
crc = crc32 (base, len, 0xffffffff);
|
|
/* Check for memory failure. */
|
|
if (crc == (unsigned long long) -1)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
sprintf (own_buf, "C%lx", (unsigned long) crc);
|
|
return;
|
|
}
|
|
|
|
if (handle_qxfer (own_buf, packet_len, new_packet_len_p))
|
|
return;
|
|
|
|
if (target_supports_tracepoints () && handle_tracepoint_query (own_buf))
|
|
return;
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
}
|
|
|
|
static void gdb_wants_all_threads_stopped (void);
|
|
|
|
/* Parse vCont packets. */
|
|
void
|
|
handle_v_cont (char *own_buf)
|
|
{
|
|
char *p, *q;
|
|
int n = 0, i = 0;
|
|
struct thread_resume *resume_info;
|
|
struct thread_resume default_action = {{0}};
|
|
|
|
/* Count the number of semicolons in the packet. There should be one
|
|
for every action. */
|
|
p = &own_buf[5];
|
|
while (p)
|
|
{
|
|
n++;
|
|
p++;
|
|
p = strchr (p, ';');
|
|
}
|
|
|
|
resume_info = malloc (n * sizeof (resume_info[0]));
|
|
if (resume_info == NULL)
|
|
goto err;
|
|
|
|
p = &own_buf[5];
|
|
while (*p)
|
|
{
|
|
p++;
|
|
|
|
memset (&resume_info[i], 0, sizeof resume_info[i]);
|
|
|
|
if (p[0] == 's' || p[0] == 'S')
|
|
resume_info[i].kind = resume_step;
|
|
else if (p[0] == 'r')
|
|
resume_info[i].kind = resume_step;
|
|
else if (p[0] == 'c' || p[0] == 'C')
|
|
resume_info[i].kind = resume_continue;
|
|
else if (p[0] == 't')
|
|
resume_info[i].kind = resume_stop;
|
|
else
|
|
goto err;
|
|
|
|
if (p[0] == 'S' || p[0] == 'C')
|
|
{
|
|
int sig;
|
|
sig = strtol (p + 1, &q, 16);
|
|
if (p == q)
|
|
goto err;
|
|
p = q;
|
|
|
|
if (!gdb_signal_to_host_p (sig))
|
|
goto err;
|
|
resume_info[i].sig = gdb_signal_to_host (sig);
|
|
}
|
|
else if (p[0] == 'r')
|
|
{
|
|
ULONGEST addr;
|
|
|
|
p = unpack_varlen_hex (p + 1, &addr);
|
|
resume_info[i].step_range_start = addr;
|
|
|
|
if (*p != ',')
|
|
goto err;
|
|
|
|
p = unpack_varlen_hex (p + 1, &addr);
|
|
resume_info[i].step_range_end = addr;
|
|
}
|
|
else
|
|
{
|
|
p = p + 1;
|
|
}
|
|
|
|
if (p[0] == 0)
|
|
{
|
|
resume_info[i].thread = minus_one_ptid;
|
|
default_action = resume_info[i];
|
|
|
|
/* Note: we don't increment i here, we'll overwrite this entry
|
|
the next time through. */
|
|
}
|
|
else if (p[0] == ':')
|
|
{
|
|
ptid_t ptid = read_ptid (p + 1, &q);
|
|
|
|
if (p == q)
|
|
goto err;
|
|
p = q;
|
|
if (p[0] != ';' && p[0] != 0)
|
|
goto err;
|
|
|
|
resume_info[i].thread = ptid;
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (i < n)
|
|
resume_info[i] = default_action;
|
|
|
|
/* `cont_thread' is still used in occasional places in the backend,
|
|
to implement single-thread scheduler-locking. Doesn't make sense
|
|
to set it if we see a stop request, or a wildcard action (one
|
|
with '-1' (all threads), or 'pPID.-1' (all threads of PID)). */
|
|
if (n == 1
|
|
&& !(ptid_equal (resume_info[0].thread, minus_one_ptid)
|
|
|| ptid_get_lwp (resume_info[0].thread) == -1)
|
|
&& resume_info[0].kind != resume_stop)
|
|
cont_thread = resume_info[0].thread;
|
|
else
|
|
cont_thread = minus_one_ptid;
|
|
set_desired_inferior (0);
|
|
|
|
if (!non_stop)
|
|
enable_async_io ();
|
|
|
|
(*the_target->resume) (resume_info, n);
|
|
|
|
free (resume_info);
|
|
|
|
if (non_stop)
|
|
write_ok (own_buf);
|
|
else
|
|
{
|
|
last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
|
|
|
|
if (last_status.kind != TARGET_WAITKIND_EXITED
|
|
&& last_status.kind != TARGET_WAITKIND_SIGNALLED)
|
|
current_inferior->last_status = last_status;
|
|
|
|
/* From the client's perspective, all-stop mode always stops all
|
|
threads implicitly (and the target backend has already done
|
|
so by now). Tag all threads as "want-stopped", so we don't
|
|
resume them implicitly without the client telling us to. */
|
|
gdb_wants_all_threads_stopped ();
|
|
prepare_resume_reply (own_buf, last_ptid, &last_status);
|
|
disable_async_io ();
|
|
|
|
if (last_status.kind == TARGET_WAITKIND_EXITED
|
|
|| last_status.kind == TARGET_WAITKIND_SIGNALLED)
|
|
mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
|
|
}
|
|
return;
|
|
|
|
err:
|
|
write_enn (own_buf);
|
|
free (resume_info);
|
|
return;
|
|
}
|
|
|
|
/* Attach to a new program. Return 1 if successful, 0 if failure. */
|
|
int
|
|
handle_v_attach (char *own_buf)
|
|
{
|
|
int pid;
|
|
|
|
pid = strtol (own_buf + 8, NULL, 16);
|
|
if (pid != 0 && attach_inferior (pid) == 0)
|
|
{
|
|
/* Don't report shared library events after attaching, even if
|
|
some libraries are preloaded. GDB will always poll the
|
|
library list. Avoids the "stopped by shared library event"
|
|
notice on the GDB side. */
|
|
dlls_changed = 0;
|
|
|
|
if (non_stop)
|
|
{
|
|
/* In non-stop, we don't send a resume reply. Stop events
|
|
will follow up using the normal notification
|
|
mechanism. */
|
|
write_ok (own_buf);
|
|
}
|
|
else
|
|
prepare_resume_reply (own_buf, last_ptid, &last_status);
|
|
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
write_enn (own_buf);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Run a new program. Return 1 if successful, 0 if failure. */
|
|
static int
|
|
handle_v_run (char *own_buf)
|
|
{
|
|
char *p, *next_p, **new_argv;
|
|
int i, new_argc;
|
|
|
|
new_argc = 0;
|
|
for (p = own_buf + strlen ("vRun;"); p && *p; p = strchr (p, ';'))
|
|
{
|
|
p++;
|
|
new_argc++;
|
|
}
|
|
|
|
new_argv = calloc (new_argc + 2, sizeof (char *));
|
|
if (new_argv == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return 0;
|
|
}
|
|
|
|
i = 0;
|
|
for (p = own_buf + strlen ("vRun;"); *p; p = next_p)
|
|
{
|
|
next_p = strchr (p, ';');
|
|
if (next_p == NULL)
|
|
next_p = p + strlen (p);
|
|
|
|
if (i == 0 && p == next_p)
|
|
new_argv[i] = NULL;
|
|
else
|
|
{
|
|
/* FIXME: Fail request if out of memory instead of dying. */
|
|
new_argv[i] = xmalloc (1 + (next_p - p) / 2);
|
|
unhexify (new_argv[i], p, (next_p - p) / 2);
|
|
new_argv[i][(next_p - p) / 2] = '\0';
|
|
}
|
|
|
|
if (*next_p)
|
|
next_p++;
|
|
i++;
|
|
}
|
|
new_argv[i] = NULL;
|
|
|
|
if (new_argv[0] == NULL)
|
|
{
|
|
/* GDB didn't specify a program to run. Use the program from the
|
|
last run with the new argument list. */
|
|
|
|
if (program_argv == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
freeargv (new_argv);
|
|
return 0;
|
|
}
|
|
|
|
new_argv[0] = strdup (program_argv[0]);
|
|
if (new_argv[0] == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
freeargv (new_argv);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Free the old argv and install the new one. */
|
|
freeargv (program_argv);
|
|
program_argv = new_argv;
|
|
|
|
start_inferior (program_argv);
|
|
if (last_status.kind == TARGET_WAITKIND_STOPPED)
|
|
{
|
|
prepare_resume_reply (own_buf, last_ptid, &last_status);
|
|
|
|
/* In non-stop, sending a resume reply doesn't set the general
|
|
thread, but GDB assumes a vRun sets it (this is so GDB can
|
|
query which is the main thread of the new inferior. */
|
|
if (non_stop)
|
|
general_thread = last_ptid;
|
|
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
write_enn (own_buf);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Kill process. Return 1 if successful, 0 if failure. */
|
|
int
|
|
handle_v_kill (char *own_buf)
|
|
{
|
|
int pid;
|
|
char *p = &own_buf[6];
|
|
if (multi_process)
|
|
pid = strtol (p, NULL, 16);
|
|
else
|
|
pid = signal_pid;
|
|
if (pid != 0 && kill_inferior (pid) == 0)
|
|
{
|
|
last_status.kind = TARGET_WAITKIND_SIGNALLED;
|
|
last_status.value.sig = GDB_SIGNAL_KILL;
|
|
last_ptid = pid_to_ptid (pid);
|
|
discard_queued_stop_replies (pid);
|
|
write_ok (own_buf);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
write_enn (own_buf);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Handle all of the extended 'v' packets. */
|
|
void
|
|
handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
|
|
{
|
|
if (!disable_packet_vCont)
|
|
{
|
|
if (strncmp (own_buf, "vCont;", 6) == 0)
|
|
{
|
|
require_running (own_buf);
|
|
handle_v_cont (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (strncmp (own_buf, "vCont?", 6) == 0)
|
|
{
|
|
strcpy (own_buf, "vCont;c;C;s;S;t");
|
|
if (target_supports_range_stepping ())
|
|
{
|
|
own_buf = own_buf + strlen (own_buf);
|
|
strcpy (own_buf, ";r");
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (strncmp (own_buf, "vFile:", 6) == 0
|
|
&& handle_vFile (own_buf, packet_len, new_packet_len))
|
|
return;
|
|
|
|
if (strncmp (own_buf, "vAttach;", 8) == 0)
|
|
{
|
|
if ((!extended_protocol || !multi_process) && target_running ())
|
|
{
|
|
fprintf (stderr, "Already debugging a process\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_attach (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (strncmp (own_buf, "vRun;", 5) == 0)
|
|
{
|
|
if ((!extended_protocol || !multi_process) && target_running ())
|
|
{
|
|
fprintf (stderr, "Already debugging a process\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_run (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (strncmp (own_buf, "vKill;", 6) == 0)
|
|
{
|
|
if (!target_running ())
|
|
{
|
|
fprintf (stderr, "No process to kill\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_kill (own_buf);
|
|
return;
|
|
}
|
|
|
|
if (handle_notif_ack (own_buf, packet_len))
|
|
return;
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
return;
|
|
}
|
|
|
|
/* Resume inferior and wait for another event. In non-stop mode,
|
|
don't really wait here, but return immediatelly to the event
|
|
loop. */
|
|
static void
|
|
myresume (char *own_buf, int step, int sig)
|
|
{
|
|
struct thread_resume resume_info[2];
|
|
int n = 0;
|
|
int valid_cont_thread;
|
|
|
|
set_desired_inferior (0);
|
|
|
|
valid_cont_thread = (!ptid_equal (cont_thread, null_ptid)
|
|
&& !ptid_equal (cont_thread, minus_one_ptid));
|
|
|
|
if (step || sig || valid_cont_thread)
|
|
{
|
|
resume_info[0].thread = current_ptid;
|
|
if (step)
|
|
resume_info[0].kind = resume_step;
|
|
else
|
|
resume_info[0].kind = resume_continue;
|
|
resume_info[0].sig = sig;
|
|
n++;
|
|
}
|
|
|
|
if (!valid_cont_thread)
|
|
{
|
|
resume_info[n].thread = minus_one_ptid;
|
|
resume_info[n].kind = resume_continue;
|
|
resume_info[n].sig = 0;
|
|
n++;
|
|
}
|
|
|
|
if (!non_stop)
|
|
enable_async_io ();
|
|
|
|
(*the_target->resume) (resume_info, n);
|
|
|
|
if (non_stop)
|
|
write_ok (own_buf);
|
|
else
|
|
{
|
|
last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
|
|
|
|
if (last_status.kind != TARGET_WAITKIND_EXITED
|
|
&& last_status.kind != TARGET_WAITKIND_SIGNALLED)
|
|
{
|
|
current_inferior->last_resume_kind = resume_stop;
|
|
current_inferior->last_status = last_status;
|
|
}
|
|
|
|
prepare_resume_reply (own_buf, last_ptid, &last_status);
|
|
disable_async_io ();
|
|
|
|
if (last_status.kind == TARGET_WAITKIND_EXITED
|
|
|| last_status.kind == TARGET_WAITKIND_SIGNALLED)
|
|
mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
|
|
}
|
|
}
|
|
|
|
/* Callback for for_each_inferior. Make a new stop reply for each
|
|
stopped thread. */
|
|
|
|
static int
|
|
queue_stop_reply_callback (struct inferior_list_entry *entry, void *arg)
|
|
{
|
|
struct thread_info *thread = (struct thread_info *) entry;
|
|
|
|
/* For now, assume targets that don't have this callback also don't
|
|
manage the thread's last_status field. */
|
|
if (the_target->thread_stopped == NULL)
|
|
{
|
|
struct vstop_notif *new_notif = xmalloc (sizeof (*new_notif));
|
|
|
|
new_notif->ptid = entry->id;
|
|
new_notif->status = thread->last_status;
|
|
/* Pass the last stop reply back to GDB, but don't notify
|
|
yet. */
|
|
notif_event_enque (¬if_stop,
|
|
(struct notif_event *) new_notif);
|
|
}
|
|
else
|
|
{
|
|
if (thread_stopped (thread))
|
|
{
|
|
if (debug_threads)
|
|
{
|
|
char *status_string
|
|
= target_waitstatus_to_string (&thread->last_status);
|
|
|
|
fprintf (stderr,
|
|
"Reporting thread %s as already stopped with %s\n",
|
|
target_pid_to_str (entry->id),
|
|
status_string);
|
|
|
|
xfree (status_string);
|
|
}
|
|
|
|
gdb_assert (thread->last_status.kind != TARGET_WAITKIND_IGNORE);
|
|
|
|
/* Pass the last stop reply back to GDB, but don't notify
|
|
yet. */
|
|
queue_stop_reply (entry->id, &thread->last_status);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Set this inferior threads's state as "want-stopped". We won't
|
|
resume this thread until the client gives us another action for
|
|
it. */
|
|
|
|
static void
|
|
gdb_wants_thread_stopped (struct inferior_list_entry *entry)
|
|
{
|
|
struct thread_info *thread = (struct thread_info *) entry;
|
|
|
|
thread->last_resume_kind = resume_stop;
|
|
|
|
if (thread->last_status.kind == TARGET_WAITKIND_IGNORE)
|
|
{
|
|
/* Most threads are stopped implicitly (all-stop); tag that with
|
|
signal 0. */
|
|
thread->last_status.kind = TARGET_WAITKIND_STOPPED;
|
|
thread->last_status.value.sig = GDB_SIGNAL_0;
|
|
}
|
|
}
|
|
|
|
/* Set all threads' states as "want-stopped". */
|
|
|
|
static void
|
|
gdb_wants_all_threads_stopped (void)
|
|
{
|
|
for_each_inferior (&all_threads, gdb_wants_thread_stopped);
|
|
}
|
|
|
|
/* Clear the gdb_detached flag of every process. */
|
|
|
|
static void
|
|
gdb_reattached_process (struct inferior_list_entry *entry)
|
|
{
|
|
struct process_info *process = (struct process_info *) entry;
|
|
|
|
process->gdb_detached = 0;
|
|
}
|
|
|
|
/* Status handler for the '?' packet. */
|
|
|
|
static void
|
|
handle_status (char *own_buf)
|
|
{
|
|
/* GDB is connected, don't forward events to the target anymore. */
|
|
for_each_inferior (&all_processes, gdb_reattached_process);
|
|
|
|
/* In non-stop mode, we must send a stop reply for each stopped
|
|
thread. In all-stop mode, just send one for the first stopped
|
|
thread we find. */
|
|
|
|
if (non_stop)
|
|
{
|
|
discard_queued_stop_replies (-1);
|
|
find_inferior (&all_threads, queue_stop_reply_callback, NULL);
|
|
|
|
/* The first is sent immediatly. OK is sent if there is no
|
|
stopped thread, which is the same handling of the vStopped
|
|
packet (by design). */
|
|
notif_write_event (¬if_stop, own_buf);
|
|
}
|
|
else
|
|
{
|
|
pause_all (0);
|
|
stabilize_threads ();
|
|
gdb_wants_all_threads_stopped ();
|
|
|
|
if (all_threads.head)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
status.kind = TARGET_WAITKIND_STOPPED;
|
|
status.value.sig = GDB_SIGNAL_TRAP;
|
|
prepare_resume_reply (own_buf,
|
|
all_threads.head->id, &status);
|
|
}
|
|
else
|
|
strcpy (own_buf, "W00");
|
|
}
|
|
}
|
|
|
|
static void
|
|
gdbserver_version (void)
|
|
{
|
|
printf ("GNU gdbserver %s%s\n"
|
|
"Copyright (C) 2013 Free Software Foundation, Inc.\n"
|
|
"gdbserver is free software, covered by the "
|
|
"GNU General Public License.\n"
|
|
"This gdbserver was configured as \"%s\"\n",
|
|
PKGVERSION, version, host_name);
|
|
}
|
|
|
|
static void
|
|
gdbserver_usage (FILE *stream)
|
|
{
|
|
fprintf (stream, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
|
|
"\tgdbserver [OPTIONS] --attach COMM PID\n"
|
|
"\tgdbserver [OPTIONS] --multi COMM\n"
|
|
"\n"
|
|
"COMM may either be a tty device (for serial debugging), or \n"
|
|
"HOST:PORT to listen for a TCP connection.\n"
|
|
"\n"
|
|
"Options:\n"
|
|
" --debug Enable general debugging output.\n"
|
|
" --remote-debug Enable remote protocol debugging output.\n"
|
|
" --version Display version information and exit.\n"
|
|
" --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
|
|
" --once Exit after the first connection has "
|
|
"closed.\n");
|
|
if (REPORT_BUGS_TO[0] && stream == stdout)
|
|
fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
|
|
}
|
|
|
|
static void
|
|
gdbserver_show_disableable (FILE *stream)
|
|
{
|
|
fprintf (stream, "Disableable packets:\n"
|
|
" vCont \tAll vCont packets\n"
|
|
" qC \tQuerying the current thread\n"
|
|
" qfThreadInfo\tThread listing\n"
|
|
" Tthread \tPassing the thread specifier in the "
|
|
"T stop reply packet\n"
|
|
" threads \tAll of the above\n");
|
|
}
|
|
|
|
|
|
#undef require_running
|
|
#define require_running(BUF) \
|
|
if (!target_running ()) \
|
|
{ \
|
|
write_enn (BUF); \
|
|
break; \
|
|
}
|
|
|
|
static int
|
|
first_thread_of (struct inferior_list_entry *entry, void *args)
|
|
{
|
|
int pid = * (int *) args;
|
|
|
|
if (ptid_get_pid (entry->id) == pid)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
kill_inferior_callback (struct inferior_list_entry *entry)
|
|
{
|
|
struct process_info *process = (struct process_info *) entry;
|
|
int pid = ptid_get_pid (process->head.id);
|
|
|
|
kill_inferior (pid);
|
|
discard_queued_stop_replies (pid);
|
|
}
|
|
|
|
/* Callback for for_each_inferior to detach or kill the inferior,
|
|
depending on whether we attached to it or not.
|
|
We inform the user whether we're detaching or killing the process
|
|
as this is only called when gdbserver is about to exit. */
|
|
|
|
static void
|
|
detach_or_kill_inferior_callback (struct inferior_list_entry *entry)
|
|
{
|
|
struct process_info *process = (struct process_info *) entry;
|
|
int pid = ptid_get_pid (process->head.id);
|
|
|
|
if (process->attached)
|
|
detach_inferior (pid);
|
|
else
|
|
kill_inferior (pid);
|
|
|
|
discard_queued_stop_replies (pid);
|
|
}
|
|
|
|
/* for_each_inferior callback for detach_or_kill_for_exit to print
|
|
the pids of started inferiors. */
|
|
|
|
static void
|
|
print_started_pid (struct inferior_list_entry *entry)
|
|
{
|
|
struct process_info *process = (struct process_info *) entry;
|
|
|
|
if (! process->attached)
|
|
{
|
|
int pid = ptid_get_pid (process->head.id);
|
|
fprintf (stderr, " %d", pid);
|
|
}
|
|
}
|
|
|
|
/* for_each_inferior callback for detach_or_kill_for_exit to print
|
|
the pids of attached inferiors. */
|
|
|
|
static void
|
|
print_attached_pid (struct inferior_list_entry *entry)
|
|
{
|
|
struct process_info *process = (struct process_info *) entry;
|
|
|
|
if (process->attached)
|
|
{
|
|
int pid = ptid_get_pid (process->head.id);
|
|
fprintf (stderr, " %d", pid);
|
|
}
|
|
}
|
|
|
|
/* Call this when exiting gdbserver with possible inferiors that need
|
|
to be killed or detached from. */
|
|
|
|
static void
|
|
detach_or_kill_for_exit (void)
|
|
{
|
|
/* First print a list of the inferiors we will be killing/detaching.
|
|
This is to assist the user, for example, in case the inferior unexpectedly
|
|
dies after we exit: did we screw up or did the inferior exit on its own?
|
|
Having this info will save some head-scratching. */
|
|
|
|
if (have_started_inferiors_p ())
|
|
{
|
|
fprintf (stderr, "Killing process(es):");
|
|
for_each_inferior (&all_processes, print_started_pid);
|
|
fprintf (stderr, "\n");
|
|
}
|
|
if (have_attached_inferiors_p ())
|
|
{
|
|
fprintf (stderr, "Detaching process(es):");
|
|
for_each_inferior (&all_processes, print_attached_pid);
|
|
fprintf (stderr, "\n");
|
|
}
|
|
|
|
/* Now we can kill or detach the inferiors. */
|
|
|
|
for_each_inferior (&all_processes, detach_or_kill_inferior_callback);
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
int bad_attach;
|
|
int pid;
|
|
char *arg_end, *port;
|
|
char **next_arg = &argv[1];
|
|
volatile int multi_mode = 0;
|
|
volatile int attach = 0;
|
|
int was_running;
|
|
|
|
while (*next_arg != NULL && **next_arg == '-')
|
|
{
|
|
if (strcmp (*next_arg, "--version") == 0)
|
|
{
|
|
gdbserver_version ();
|
|
exit (0);
|
|
}
|
|
else if (strcmp (*next_arg, "--help") == 0)
|
|
{
|
|
gdbserver_usage (stdout);
|
|
exit (0);
|
|
}
|
|
else if (strcmp (*next_arg, "--attach") == 0)
|
|
attach = 1;
|
|
else if (strcmp (*next_arg, "--multi") == 0)
|
|
multi_mode = 1;
|
|
else if (strcmp (*next_arg, "--wrapper") == 0)
|
|
{
|
|
next_arg++;
|
|
|
|
wrapper_argv = next_arg;
|
|
while (*next_arg != NULL && strcmp (*next_arg, "--") != 0)
|
|
next_arg++;
|
|
|
|
if (next_arg == wrapper_argv || *next_arg == NULL)
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
/* Consume the "--". */
|
|
*next_arg = NULL;
|
|
}
|
|
else if (strcmp (*next_arg, "--debug") == 0)
|
|
debug_threads = 1;
|
|
else if (strcmp (*next_arg, "--remote-debug") == 0)
|
|
remote_debug = 1;
|
|
else if (strcmp (*next_arg, "--disable-packet") == 0)
|
|
{
|
|
gdbserver_show_disableable (stdout);
|
|
exit (0);
|
|
}
|
|
else if (strncmp (*next_arg,
|
|
"--disable-packet=",
|
|
sizeof ("--disable-packet=") - 1) == 0)
|
|
{
|
|
char *packets, *tok;
|
|
|
|
packets = *next_arg += sizeof ("--disable-packet=") - 1;
|
|
for (tok = strtok (packets, ",");
|
|
tok != NULL;
|
|
tok = strtok (NULL, ","))
|
|
{
|
|
if (strcmp ("vCont", tok) == 0)
|
|
disable_packet_vCont = 1;
|
|
else if (strcmp ("Tthread", tok) == 0)
|
|
disable_packet_Tthread = 1;
|
|
else if (strcmp ("qC", tok) == 0)
|
|
disable_packet_qC = 1;
|
|
else if (strcmp ("qfThreadInfo", tok) == 0)
|
|
disable_packet_qfThreadInfo = 1;
|
|
else if (strcmp ("threads", tok) == 0)
|
|
{
|
|
disable_packet_vCont = 1;
|
|
disable_packet_Tthread = 1;
|
|
disable_packet_qC = 1;
|
|
disable_packet_qfThreadInfo = 1;
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Don't know how to disable \"%s\".\n\n",
|
|
tok);
|
|
gdbserver_show_disableable (stderr);
|
|
exit (1);
|
|
}
|
|
}
|
|
}
|
|
else if (strcmp (*next_arg, "-") == 0)
|
|
{
|
|
/* "-" specifies a stdio connection and is a form of port
|
|
specification. */
|
|
*next_arg = STDIO_CONNECTION_NAME;
|
|
break;
|
|
}
|
|
else if (strcmp (*next_arg, "--disable-randomization") == 0)
|
|
disable_randomization = 1;
|
|
else if (strcmp (*next_arg, "--no-disable-randomization") == 0)
|
|
disable_randomization = 0;
|
|
else if (strcmp (*next_arg, "--once") == 0)
|
|
run_once = 1;
|
|
else
|
|
{
|
|
fprintf (stderr, "Unknown argument: %s\n", *next_arg);
|
|
exit (1);
|
|
}
|
|
|
|
next_arg++;
|
|
continue;
|
|
}
|
|
|
|
if (setjmp (toplevel))
|
|
{
|
|
fprintf (stderr, "Exiting\n");
|
|
exit (1);
|
|
}
|
|
|
|
port = *next_arg;
|
|
next_arg++;
|
|
if (port == NULL || (!attach && !multi_mode && *next_arg == NULL))
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
/* We need to know whether the remote connection is stdio before
|
|
starting the inferior. Inferiors created in this scenario have
|
|
stdin,stdout redirected. So do this here before we call
|
|
start_inferior. */
|
|
remote_prepare (port);
|
|
|
|
bad_attach = 0;
|
|
pid = 0;
|
|
|
|
/* --attach used to come after PORT, so allow it there for
|
|
compatibility. */
|
|
if (*next_arg != NULL && strcmp (*next_arg, "--attach") == 0)
|
|
{
|
|
attach = 1;
|
|
next_arg++;
|
|
}
|
|
|
|
if (attach
|
|
&& (*next_arg == NULL
|
|
|| (*next_arg)[0] == '\0'
|
|
|| (pid = strtoul (*next_arg, &arg_end, 0)) == 0
|
|
|| *arg_end != '\0'
|
|
|| next_arg[1] != NULL))
|
|
bad_attach = 1;
|
|
|
|
if (bad_attach)
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
initialize_async_io ();
|
|
initialize_low ();
|
|
initialize_event_loop ();
|
|
if (target_supports_tracepoints ())
|
|
initialize_tracepoint ();
|
|
|
|
own_buf = xmalloc (PBUFSIZ + 1);
|
|
mem_buf = xmalloc (PBUFSIZ);
|
|
|
|
if (pid == 0 && *next_arg != NULL)
|
|
{
|
|
int i, n;
|
|
|
|
n = argc - (next_arg - argv);
|
|
program_argv = xmalloc (sizeof (char *) * (n + 1));
|
|
for (i = 0; i < n; i++)
|
|
program_argv[i] = xstrdup (next_arg[i]);
|
|
program_argv[i] = NULL;
|
|
|
|
/* Wait till we are at first instruction in program. */
|
|
start_inferior (program_argv);
|
|
|
|
/* We are now (hopefully) stopped at the first instruction of
|
|
the target process. This assumes that the target process was
|
|
successfully created. */
|
|
}
|
|
else if (pid != 0)
|
|
{
|
|
if (attach_inferior (pid) == -1)
|
|
error ("Attaching not supported on this target");
|
|
|
|
/* Otherwise succeeded. */
|
|
}
|
|
else
|
|
{
|
|
last_status.kind = TARGET_WAITKIND_EXITED;
|
|
last_status.value.integer = 0;
|
|
last_ptid = minus_one_ptid;
|
|
}
|
|
|
|
initialize_notif ();
|
|
|
|
/* Don't report shared library events on the initial connection,
|
|
even if some libraries are preloaded. Avoids the "stopped by
|
|
shared library event" notice on gdb side. */
|
|
dlls_changed = 0;
|
|
|
|
if (setjmp (toplevel))
|
|
{
|
|
/* If something fails and longjmps while detaching or killing
|
|
inferiors, we'd end up here again, stuck in an infinite loop
|
|
trap. Be sure that if that happens, we exit immediately
|
|
instead. */
|
|
if (setjmp (toplevel) == 0)
|
|
detach_or_kill_for_exit ();
|
|
else
|
|
fprintf (stderr, "Detach or kill failed. Exiting\n");
|
|
exit (1);
|
|
}
|
|
|
|
if (last_status.kind == TARGET_WAITKIND_EXITED
|
|
|| last_status.kind == TARGET_WAITKIND_SIGNALLED)
|
|
was_running = 0;
|
|
else
|
|
was_running = 1;
|
|
|
|
if (!was_running && !multi_mode)
|
|
{
|
|
fprintf (stderr, "No program to debug. GDBserver exiting.\n");
|
|
exit (1);
|
|
}
|
|
|
|
while (1)
|
|
{
|
|
noack_mode = 0;
|
|
multi_process = 0;
|
|
/* Be sure we're out of tfind mode. */
|
|
current_traceframe = -1;
|
|
|
|
remote_open (port);
|
|
|
|
if (setjmp (toplevel) != 0)
|
|
{
|
|
/* An error occurred. */
|
|
if (response_needed)
|
|
{
|
|
write_enn (own_buf);
|
|
putpkt (own_buf);
|
|
}
|
|
}
|
|
|
|
/* Wait for events. This will return when all event sources are
|
|
removed from the event loop. */
|
|
start_event_loop ();
|
|
|
|
/* If an exit was requested (using the "monitor exit" command),
|
|
terminate now. The only other way to get here is for
|
|
getpkt to fail; close the connection and reopen it at the
|
|
top of the loop. */
|
|
|
|
if (exit_requested || run_once)
|
|
{
|
|
/* If something fails and longjmps while detaching or
|
|
killing inferiors, we'd end up here again, stuck in an
|
|
infinite loop trap. Be sure that if that happens, we
|
|
exit immediately instead. */
|
|
if (setjmp (toplevel) == 0)
|
|
{
|
|
detach_or_kill_for_exit ();
|
|
exit (0);
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Detach or kill failed. Exiting\n");
|
|
exit (1);
|
|
}
|
|
}
|
|
|
|
fprintf (stderr,
|
|
"Remote side has terminated connection. "
|
|
"GDBserver will reopen the connection.\n");
|
|
|
|
if (tracing)
|
|
{
|
|
if (disconnected_tracing)
|
|
{
|
|
/* Try to enable non-stop/async mode, so we we can both
|
|
wait for an async socket accept, and handle async
|
|
target events simultaneously. There's also no point
|
|
either in having the target always stop all threads,
|
|
when we're going to pass signals down without
|
|
informing GDB. */
|
|
if (!non_stop)
|
|
{
|
|
if (start_non_stop (1))
|
|
non_stop = 1;
|
|
|
|
/* Detaching implicitly resumes all threads; simply
|
|
disconnecting does not. */
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr,
|
|
"Disconnected tracing disabled; stopping trace run.\n");
|
|
stop_tracing ();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Process options coming from Z packets for *point at address
|
|
POINT_ADDR. PACKET is the packet buffer. *PACKET is updated
|
|
to point to the first char after the last processed option. */
|
|
|
|
static void
|
|
process_point_options (CORE_ADDR point_addr, char **packet)
|
|
{
|
|
char *dataptr = *packet;
|
|
int persist;
|
|
|
|
/* Check if data has the correct format. */
|
|
if (*dataptr != ';')
|
|
return;
|
|
|
|
dataptr++;
|
|
|
|
while (*dataptr)
|
|
{
|
|
if (*dataptr == ';')
|
|
++dataptr;
|
|
|
|
if (*dataptr == 'X')
|
|
{
|
|
/* Conditional expression. */
|
|
if (debug_threads)
|
|
fprintf (stderr, "Found breakpoint condition.\n");
|
|
add_breakpoint_condition (point_addr, &dataptr);
|
|
}
|
|
else if (strncmp (dataptr, "cmds:", strlen ("cmds:")) == 0)
|
|
{
|
|
dataptr += strlen ("cmds:");
|
|
if (debug_threads)
|
|
fprintf (stderr, "Found breakpoint commands %s.\n", dataptr);
|
|
persist = (*dataptr == '1');
|
|
dataptr += 2;
|
|
add_breakpoint_commands (point_addr, &dataptr, persist);
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Unknown token %c, ignoring.\n",
|
|
*dataptr);
|
|
/* Skip tokens until we find one that we recognize. */
|
|
while (*dataptr && *dataptr != ';')
|
|
dataptr++;
|
|
}
|
|
}
|
|
*packet = dataptr;
|
|
}
|
|
|
|
/* Event loop callback that handles a serial event. The first byte in
|
|
the serial buffer gets us here. We expect characters to arrive at
|
|
a brisk pace, so we read the rest of the packet with a blocking
|
|
getpkt call. */
|
|
|
|
static int
|
|
process_serial_event (void)
|
|
{
|
|
char ch;
|
|
int i = 0;
|
|
int signal;
|
|
unsigned int len;
|
|
int res;
|
|
CORE_ADDR mem_addr;
|
|
int pid;
|
|
unsigned char sig;
|
|
int packet_len;
|
|
int new_packet_len = -1;
|
|
|
|
/* Used to decide when gdbserver should exit in
|
|
multi-mode/remote. */
|
|
static int have_ran = 0;
|
|
|
|
if (!have_ran)
|
|
have_ran = target_running ();
|
|
|
|
disable_async_io ();
|
|
|
|
response_needed = 0;
|
|
packet_len = getpkt (own_buf);
|
|
if (packet_len <= 0)
|
|
{
|
|
remote_close ();
|
|
/* Force an event loop break. */
|
|
return -1;
|
|
}
|
|
response_needed = 1;
|
|
|
|
i = 0;
|
|
ch = own_buf[i++];
|
|
switch (ch)
|
|
{
|
|
case 'q':
|
|
handle_query (own_buf, packet_len, &new_packet_len);
|
|
break;
|
|
case 'Q':
|
|
handle_general_set (own_buf);
|
|
break;
|
|
case 'D':
|
|
require_running (own_buf);
|
|
|
|
if (multi_process)
|
|
{
|
|
i++; /* skip ';' */
|
|
pid = strtol (&own_buf[i], NULL, 16);
|
|
}
|
|
else
|
|
pid = ptid_get_pid (current_ptid);
|
|
|
|
if ((tracing && disconnected_tracing) || any_persistent_commands ())
|
|
{
|
|
struct thread_resume resume_info;
|
|
struct process_info *process = find_process_pid (pid);
|
|
|
|
if (process == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
|
|
if (tracing && disconnected_tracing)
|
|
fprintf (stderr,
|
|
"Disconnected tracing in effect, "
|
|
"leaving gdbserver attached to the process\n");
|
|
|
|
if (any_persistent_commands ())
|
|
fprintf (stderr,
|
|
"Persistent commands are present, "
|
|
"leaving gdbserver attached to the process\n");
|
|
|
|
/* Make sure we're in non-stop/async mode, so we we can both
|
|
wait for an async socket accept, and handle async target
|
|
events simultaneously. There's also no point either in
|
|
having the target stop all threads, when we're going to
|
|
pass signals down without informing GDB. */
|
|
if (!non_stop)
|
|
{
|
|
if (debug_threads)
|
|
fprintf (stderr, "Forcing non-stop mode\n");
|
|
|
|
non_stop = 1;
|
|
start_non_stop (1);
|
|
}
|
|
|
|
process->gdb_detached = 1;
|
|
|
|
/* Detaching implicitly resumes all threads. */
|
|
resume_info.thread = minus_one_ptid;
|
|
resume_info.kind = resume_continue;
|
|
resume_info.sig = 0;
|
|
(*the_target->resume) (&resume_info, 1);
|
|
|
|
write_ok (own_buf);
|
|
break; /* from switch/case */
|
|
}
|
|
|
|
fprintf (stderr, "Detaching from process %d\n", pid);
|
|
stop_tracing ();
|
|
if (detach_inferior (pid) != 0)
|
|
write_enn (own_buf);
|
|
else
|
|
{
|
|
discard_queued_stop_replies (pid);
|
|
write_ok (own_buf);
|
|
|
|
if (extended_protocol)
|
|
{
|
|
/* Treat this like a normal program exit. */
|
|
last_status.kind = TARGET_WAITKIND_EXITED;
|
|
last_status.value.integer = 0;
|
|
last_ptid = pid_to_ptid (pid);
|
|
|
|
current_inferior = NULL;
|
|
}
|
|
else
|
|
{
|
|
putpkt (own_buf);
|
|
remote_close ();
|
|
|
|
/* If we are attached, then we can exit. Otherwise, we
|
|
need to hang around doing nothing, until the child is
|
|
gone. */
|
|
join_inferior (pid);
|
|
exit (0);
|
|
}
|
|
}
|
|
break;
|
|
case '!':
|
|
extended_protocol = 1;
|
|
write_ok (own_buf);
|
|
break;
|
|
case '?':
|
|
handle_status (own_buf);
|
|
break;
|
|
case 'H':
|
|
if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
|
|
{
|
|
ptid_t gdb_id, thread_id;
|
|
int pid;
|
|
|
|
require_running (own_buf);
|
|
|
|
gdb_id = read_ptid (&own_buf[2], NULL);
|
|
|
|
pid = ptid_get_pid (gdb_id);
|
|
|
|
if (ptid_equal (gdb_id, null_ptid)
|
|
|| ptid_equal (gdb_id, minus_one_ptid))
|
|
thread_id = null_ptid;
|
|
else if (pid != 0
|
|
&& ptid_equal (pid_to_ptid (pid),
|
|
gdb_id))
|
|
{
|
|
struct thread_info *thread =
|
|
(struct thread_info *) find_inferior (&all_threads,
|
|
first_thread_of,
|
|
&pid);
|
|
if (!thread)
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
|
|
thread_id = ((struct inferior_list_entry *)thread)->id;
|
|
}
|
|
else
|
|
{
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (ptid_equal (thread_id, null_ptid))
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (own_buf[1] == 'g')
|
|
{
|
|
if (ptid_equal (thread_id, null_ptid))
|
|
{
|
|
/* GDB is telling us to choose any thread. Check if
|
|
the currently selected thread is still valid. If
|
|
it is not, select the first available. */
|
|
struct thread_info *thread =
|
|
(struct thread_info *) find_inferior_id (&all_threads,
|
|
general_thread);
|
|
if (thread == NULL)
|
|
thread_id = all_threads.head->id;
|
|
}
|
|
|
|
general_thread = thread_id;
|
|
set_desired_inferior (1);
|
|
}
|
|
else if (own_buf[1] == 'c')
|
|
cont_thread = thread_id;
|
|
|
|
write_ok (own_buf);
|
|
}
|
|
else
|
|
{
|
|
/* Silently ignore it so that gdb can extend the protocol
|
|
without compatibility headaches. */
|
|
own_buf[0] = '\0';
|
|
}
|
|
break;
|
|
case 'g':
|
|
require_running (own_buf);
|
|
if (current_traceframe >= 0)
|
|
{
|
|
struct regcache *regcache
|
|
= new_register_cache (current_target_desc ());
|
|
|
|
if (fetch_traceframe_registers (current_traceframe,
|
|
regcache, -1) == 0)
|
|
registers_to_string (regcache, own_buf);
|
|
else
|
|
write_enn (own_buf);
|
|
free_register_cache (regcache);
|
|
}
|
|
else
|
|
{
|
|
struct regcache *regcache;
|
|
|
|
set_desired_inferior (1);
|
|
regcache = get_thread_regcache (current_inferior, 1);
|
|
registers_to_string (regcache, own_buf);
|
|
}
|
|
break;
|
|
case 'G':
|
|
require_running (own_buf);
|
|
if (current_traceframe >= 0)
|
|
write_enn (own_buf);
|
|
else
|
|
{
|
|
struct regcache *regcache;
|
|
|
|
set_desired_inferior (1);
|
|
regcache = get_thread_regcache (current_inferior, 1);
|
|
registers_from_string (regcache, &own_buf[1]);
|
|
write_ok (own_buf);
|
|
}
|
|
break;
|
|
case 'm':
|
|
require_running (own_buf);
|
|
decode_m_packet (&own_buf[1], &mem_addr, &len);
|
|
res = gdb_read_memory (mem_addr, mem_buf, len);
|
|
if (res < 0)
|
|
write_enn (own_buf);
|
|
else
|
|
convert_int_to_ascii (mem_buf, own_buf, res);
|
|
break;
|
|
case 'M':
|
|
require_running (own_buf);
|
|
decode_M_packet (&own_buf[1], &mem_addr, &len, &mem_buf);
|
|
if (gdb_write_memory (mem_addr, mem_buf, len) == 0)
|
|
write_ok (own_buf);
|
|
else
|
|
write_enn (own_buf);
|
|
break;
|
|
case 'X':
|
|
require_running (own_buf);
|
|
if (decode_X_packet (&own_buf[1], packet_len - 1,
|
|
&mem_addr, &len, &mem_buf) < 0
|
|
|| gdb_write_memory (mem_addr, mem_buf, len) != 0)
|
|
write_enn (own_buf);
|
|
else
|
|
write_ok (own_buf);
|
|
break;
|
|
case 'C':
|
|
require_running (own_buf);
|
|
convert_ascii_to_int (own_buf + 1, &sig, 1);
|
|
if (gdb_signal_to_host_p (sig))
|
|
signal = gdb_signal_to_host (sig);
|
|
else
|
|
signal = 0;
|
|
myresume (own_buf, 0, signal);
|
|
break;
|
|
case 'S':
|
|
require_running (own_buf);
|
|
convert_ascii_to_int (own_buf + 1, &sig, 1);
|
|
if (gdb_signal_to_host_p (sig))
|
|
signal = gdb_signal_to_host (sig);
|
|
else
|
|
signal = 0;
|
|
myresume (own_buf, 1, signal);
|
|
break;
|
|
case 'c':
|
|
require_running (own_buf);
|
|
signal = 0;
|
|
myresume (own_buf, 0, signal);
|
|
break;
|
|
case 's':
|
|
require_running (own_buf);
|
|
signal = 0;
|
|
myresume (own_buf, 1, signal);
|
|
break;
|
|
case 'Z': /* insert_ ... */
|
|
/* Fallthrough. */
|
|
case 'z': /* remove_ ... */
|
|
{
|
|
char *dataptr;
|
|
ULONGEST addr;
|
|
int len;
|
|
char type = own_buf[1];
|
|
int res;
|
|
const int insert = ch == 'Z';
|
|
char *p = &own_buf[3];
|
|
|
|
p = unpack_varlen_hex (p, &addr);
|
|
len = strtol (p + 1, &dataptr, 16);
|
|
|
|
/* Default to unrecognized/unsupported. */
|
|
res = 1;
|
|
switch (type)
|
|
{
|
|
case '0': /* software-breakpoint */
|
|
case '1': /* hardware-breakpoint */
|
|
case '2': /* write watchpoint */
|
|
case '3': /* read watchpoint */
|
|
case '4': /* access watchpoint */
|
|
require_running (own_buf);
|
|
if (insert && the_target->insert_point != NULL)
|
|
{
|
|
/* Insert the breakpoint. If it is already inserted, nothing
|
|
will take place. */
|
|
res = (*the_target->insert_point) (type, addr, len);
|
|
|
|
/* GDB may have sent us a list of *point parameters to be
|
|
evaluated on the target's side. Read such list here. If we
|
|
already have a list of parameters, GDB is telling us to drop
|
|
that list and use this one instead. */
|
|
if (!res && (type == '0' || type == '1'))
|
|
{
|
|
/* Remove previous conditions. */
|
|
clear_gdb_breakpoint_conditions (addr);
|
|
process_point_options (addr, &dataptr);
|
|
}
|
|
}
|
|
else if (!insert && the_target->remove_point != NULL)
|
|
res = (*the_target->remove_point) (type, addr, len);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (res == 0)
|
|
write_ok (own_buf);
|
|
else if (res == 1)
|
|
/* Unsupported. */
|
|
own_buf[0] = '\0';
|
|
else
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
case 'k':
|
|
response_needed = 0;
|
|
if (!target_running ())
|
|
/* The packet we received doesn't make sense - but we can't
|
|
reply to it, either. */
|
|
return 0;
|
|
|
|
fprintf (stderr, "Killing all inferiors\n");
|
|
for_each_inferior (&all_processes, kill_inferior_callback);
|
|
|
|
/* When using the extended protocol, we wait with no program
|
|
running. The traditional protocol will exit instead. */
|
|
if (extended_protocol)
|
|
{
|
|
last_status.kind = TARGET_WAITKIND_EXITED;
|
|
last_status.value.sig = GDB_SIGNAL_KILL;
|
|
return 0;
|
|
}
|
|
else
|
|
exit (0);
|
|
|
|
case 'T':
|
|
{
|
|
ptid_t gdb_id, thread_id;
|
|
|
|
require_running (own_buf);
|
|
|
|
gdb_id = read_ptid (&own_buf[1], NULL);
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (ptid_equal (thread_id, null_ptid))
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
|
|
if (mythread_alive (thread_id))
|
|
write_ok (own_buf);
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
break;
|
|
case 'R':
|
|
response_needed = 0;
|
|
|
|
/* Restarting the inferior is only supported in the extended
|
|
protocol. */
|
|
if (extended_protocol)
|
|
{
|
|
if (target_running ())
|
|
for_each_inferior (&all_processes,
|
|
kill_inferior_callback);
|
|
fprintf (stderr, "GDBserver restarting\n");
|
|
|
|
/* Wait till we are at 1st instruction in prog. */
|
|
if (program_argv != NULL)
|
|
start_inferior (program_argv);
|
|
else
|
|
{
|
|
last_status.kind = TARGET_WAITKIND_EXITED;
|
|
last_status.value.sig = GDB_SIGNAL_KILL;
|
|
}
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
/* It is a request we don't understand. Respond with an
|
|
empty packet so that gdb knows that we don't support this
|
|
request. */
|
|
own_buf[0] = '\0';
|
|
break;
|
|
}
|
|
case 'v':
|
|
/* Extended (long) request. */
|
|
handle_v_requests (own_buf, packet_len, &new_packet_len);
|
|
break;
|
|
|
|
default:
|
|
/* It is a request we don't understand. Respond with an empty
|
|
packet so that gdb knows that we don't support this
|
|
request. */
|
|
own_buf[0] = '\0';
|
|
break;
|
|
}
|
|
|
|
if (new_packet_len != -1)
|
|
putpkt_binary (own_buf, new_packet_len);
|
|
else
|
|
putpkt (own_buf);
|
|
|
|
response_needed = 0;
|
|
|
|
if (!extended_protocol && have_ran && !target_running ())
|
|
{
|
|
/* In non-stop, defer exiting until GDB had a chance to query
|
|
the whole vStopped list (until it gets an OK). */
|
|
if (QUEUE_is_empty (notif_event_p, notif_stop.queue))
|
|
{
|
|
fprintf (stderr, "GDBserver exiting\n");
|
|
remote_close ();
|
|
exit (0);
|
|
}
|
|
}
|
|
|
|
if (exit_requested)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Event-loop callback for serial events. */
|
|
|
|
int
|
|
handle_serial_event (int err, gdb_client_data client_data)
|
|
{
|
|
if (debug_threads)
|
|
fprintf (stderr, "handling possible serial event\n");
|
|
|
|
/* Really handle it. */
|
|
if (process_serial_event () < 0)
|
|
return -1;
|
|
|
|
/* Be sure to not change the selected inferior behind GDB's back.
|
|
Important in the non-stop mode asynchronous protocol. */
|
|
set_desired_inferior (1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Event-loop callback for target events. */
|
|
|
|
int
|
|
handle_target_event (int err, gdb_client_data client_data)
|
|
{
|
|
if (debug_threads)
|
|
fprintf (stderr, "handling possible target event\n");
|
|
|
|
last_ptid = mywait (minus_one_ptid, &last_status,
|
|
TARGET_WNOHANG, 1);
|
|
|
|
if (last_status.kind != TARGET_WAITKIND_IGNORE)
|
|
{
|
|
int pid = ptid_get_pid (last_ptid);
|
|
struct process_info *process = find_process_pid (pid);
|
|
int forward_event = !gdb_connected () || process->gdb_detached;
|
|
|
|
if (last_status.kind == TARGET_WAITKIND_EXITED
|
|
|| last_status.kind == TARGET_WAITKIND_SIGNALLED)
|
|
{
|
|
mark_breakpoints_out (process);
|
|
mourn_inferior (process);
|
|
}
|
|
else
|
|
{
|
|
/* We're reporting this thread as stopped. Update its
|
|
"want-stopped" state to what the client wants, until it
|
|
gets a new resume action. */
|
|
current_inferior->last_resume_kind = resume_stop;
|
|
current_inferior->last_status = last_status;
|
|
}
|
|
|
|
if (forward_event)
|
|
{
|
|
if (!target_running ())
|
|
{
|
|
/* The last process exited. We're done. */
|
|
exit (0);
|
|
}
|
|
|
|
if (last_status.kind == TARGET_WAITKIND_STOPPED)
|
|
{
|
|
/* A thread stopped with a signal, but gdb isn't
|
|
connected to handle it. Pass it down to the
|
|
inferior, as if it wasn't being traced. */
|
|
struct thread_resume resume_info;
|
|
|
|
if (debug_threads)
|
|
fprintf (stderr,
|
|
"GDB not connected; forwarding event %d for [%s]\n",
|
|
(int) last_status.kind,
|
|
target_pid_to_str (last_ptid));
|
|
|
|
resume_info.thread = last_ptid;
|
|
resume_info.kind = resume_continue;
|
|
resume_info.sig = gdb_signal_to_host (last_status.value.sig);
|
|
(*the_target->resume) (&resume_info, 1);
|
|
}
|
|
else if (debug_threads)
|
|
fprintf (stderr, "GDB not connected; ignoring event %d for [%s]\n",
|
|
(int) last_status.kind,
|
|
target_pid_to_str (last_ptid));
|
|
}
|
|
else
|
|
{
|
|
struct vstop_notif *vstop_notif
|
|
= xmalloc (sizeof (struct vstop_notif));
|
|
|
|
vstop_notif->status = last_status;
|
|
vstop_notif->ptid = last_ptid;
|
|
/* Push Stop notification. */
|
|
notif_push (¬if_stop,
|
|
(struct notif_event *) vstop_notif);
|
|
}
|
|
}
|
|
|
|
/* Be sure to not change the selected inferior behind GDB's back.
|
|
Important in the non-stop mode asynchronous protocol. */
|
|
set_desired_inferior (1);
|
|
|
|
return 0;
|
|
}
|