1287 lines
30 KiB
C
1287 lines
30 KiB
C
/* Main code for remote server for GDB.
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Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003,
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2004, 2005, 2006, 2007 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 2 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, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "server.h"
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#if HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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unsigned long cont_thread;
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unsigned long general_thread;
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unsigned long step_thread;
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unsigned long thread_from_wait;
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unsigned long old_thread_from_wait;
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int extended_protocol;
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int server_waiting;
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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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int pass_signals[TARGET_SIGNAL_LAST];
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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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static int
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start_inferior (char *argv[], char *statusptr)
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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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signal_pid = create_inferior (argv[0], 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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/* Wait till we are at 1st instruction in program, return signal
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number (assuming success). */
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return mywait (statusptr, 0);
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}
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static int
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attach_inferior (int pid, char *statusptr, int *sigptr)
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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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*sigptr = mywait (statusptr, 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 (*statusptr == 'T' && *sigptr == TARGET_SIGNAL_STOP)
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*sigptr = TARGET_SIGNAL_TRAP;
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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, char **annex, CORE_ADDR *ofs, unsigned int *len)
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{
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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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/* 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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/* 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 all of the extended 'Q' packets. */
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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) TARGET_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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/* Otherwise we didn't know what packet it was. Say we didn't
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understand it. */
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own_buf[0] = 0;
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}
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static const char *
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get_features_xml (const char *annex)
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{
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static int features_supported = -1;
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static char *document;
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#ifdef USE_XML
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extern const char *const xml_builtin[][2];
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int i;
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/* Look for the annex. */
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for (i = 0; xml_builtin[i][0] != NULL; i++)
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if (strcmp (annex, xml_builtin[i][0]) == 0)
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break;
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if (xml_builtin[i][0] != NULL)
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return xml_builtin[i][1];
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#endif
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if (strcmp (annex, "target.xml") != 0)
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return NULL;
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if (features_supported == -1)
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{
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const char *arch = NULL;
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if (the_target->arch_string != NULL)
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arch = (*the_target->arch_string) ();
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if (arch == NULL)
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features_supported = 0;
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else
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{
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features_supported = 1;
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document = malloc (64 + strlen (arch));
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snprintf (document, 64 + strlen (arch),
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"<target><architecture>%s</architecture></target>",
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arch);
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}
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}
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return document;
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}
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void
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monitor_show_help (void)
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{
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monitor_output ("The following monitor commands are supported:\n");
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monitor_output (" set debug <0|1>\n");
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monitor_output (" Enable general debugging messages\n");
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monitor_output (" set remote-debug <0|1>\n");
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monitor_output (" Enable remote protocol debugging messages\n");
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}
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/* Handle all of the extended 'q' packets. */
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void
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handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
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{
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static struct inferior_list_entry *thread_ptr;
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/* Reply the current thread id. */
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if (strcmp ("qC", own_buf) == 0)
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{
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thread_ptr = all_threads.head;
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sprintf (own_buf, "QC%x",
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thread_to_gdb_id ((struct thread_info *)thread_ptr));
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return;
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}
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if (strcmp ("qSymbol::", own_buf) == 0)
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{
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if (the_target->look_up_symbols != NULL)
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(*the_target->look_up_symbols) ();
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strcpy (own_buf, "OK");
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return;
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}
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if (strcmp ("qfThreadInfo", own_buf) == 0)
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{
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thread_ptr = all_threads.head;
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sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
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thread_ptr = thread_ptr->next;
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return;
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}
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if (strcmp ("qsThreadInfo", own_buf) == 0)
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{
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if (thread_ptr != NULL)
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{
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sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
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thread_ptr = thread_ptr->next;
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return;
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}
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else
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{
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sprintf (own_buf, "l");
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return;
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}
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}
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if (the_target->read_offsets != NULL
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&& strcmp ("qOffsets", own_buf) == 0)
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{
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CORE_ADDR text, data;
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if (the_target->read_offsets (&text, &data))
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sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX",
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(long)text, (long)data, (long)data);
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else
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write_enn (own_buf);
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return;
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}
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if (the_target->qxfer_spu != NULL
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&& strncmp ("qXfer:spu:read:", own_buf, 15) == 0)
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{
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char *annex;
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int n;
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unsigned int len;
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CORE_ADDR ofs;
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unsigned char *spu_buf;
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strcpy (own_buf, "E00");
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if (decode_xfer_read (own_buf + 15, &annex, &ofs, &len) < 0)
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return;
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if (len > PBUFSIZ - 2)
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len = PBUFSIZ - 2;
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spu_buf = malloc (len + 1);
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if (!spu_buf)
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return;
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n = (*the_target->qxfer_spu) (annex, spu_buf, NULL, ofs, len + 1);
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if (n < 0)
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write_enn (own_buf);
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else if (n > len)
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*new_packet_len_p = write_qxfer_response
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(own_buf, spu_buf, len, 1);
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else
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*new_packet_len_p = write_qxfer_response
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(own_buf, spu_buf, n, 0);
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free (spu_buf);
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return;
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}
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if (the_target->qxfer_spu != NULL
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&& strncmp ("qXfer:spu:write:", own_buf, 16) == 0)
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{
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char *annex;
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int n;
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unsigned int len;
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CORE_ADDR ofs;
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unsigned char *spu_buf;
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strcpy (own_buf, "E00");
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spu_buf = malloc (packet_len - 15);
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if (!spu_buf)
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return;
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if (decode_xfer_write (own_buf + 16, packet_len - 16, &annex,
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&ofs, &len, spu_buf) < 0)
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{
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free (spu_buf);
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return;
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}
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n = (*the_target->qxfer_spu)
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(annex, NULL, (unsigned const char *)spu_buf, ofs, len);
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if (n < 0)
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write_enn (own_buf);
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else
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sprintf (own_buf, "%x", n);
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free (spu_buf);
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return;
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}
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if (the_target->read_auxv != NULL
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&& strncmp ("qXfer:auxv:read:", own_buf, 16) == 0)
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{
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unsigned char *data;
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int n;
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CORE_ADDR ofs;
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unsigned int len;
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char *annex;
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/* Reject any annex; grab the offset and length. */
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if (decode_xfer_read (own_buf + 16, &annex, &ofs, &len) < 0
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|| annex[0] != '\0')
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{
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strcpy (own_buf, "E00");
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return;
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}
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/* Read one extra byte, as an indicator of whether there is
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more. */
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if (len > PBUFSIZ - 2)
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len = PBUFSIZ - 2;
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data = malloc (len + 1);
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n = (*the_target->read_auxv) (ofs, data, len + 1);
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if (n < 0)
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write_enn (own_buf);
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else if (n > len)
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*new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
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else
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*new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
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free (data);
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return;
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}
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if (strncmp ("qXfer:features:read:", own_buf, 20) == 0)
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{
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CORE_ADDR ofs;
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unsigned int len, total_len;
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const char *document;
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char *annex;
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/* Check for support. */
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document = get_features_xml ("target.xml");
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if (document == NULL)
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{
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own_buf[0] = '\0';
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return;
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}
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/* Grab the annex, offset, and length. */
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if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0)
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{
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strcpy (own_buf, "E00");
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return;
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}
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/* Now grab the correct annex. */
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document = get_features_xml (annex);
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if (document == NULL)
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{
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strcpy (own_buf, "E00");
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return;
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}
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total_len = strlen (document);
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if (len > PBUFSIZ - 2)
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len = PBUFSIZ - 2;
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if (ofs > total_len)
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write_enn (own_buf);
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else if (len < total_len - ofs)
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*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
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len, 1);
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else
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*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
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total_len - ofs, 0);
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return;
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}
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if (strncmp ("qXfer:libraries:read:", own_buf, 21) == 0)
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{
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CORE_ADDR ofs;
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unsigned int len, total_len;
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char *document, *p;
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struct inferior_list_entry *dll_ptr;
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char *annex;
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/* Reject any annex; grab the offset and length. */
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if (decode_xfer_read (own_buf + 21, &annex, &ofs, &len) < 0
|
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|| annex[0] != '\0')
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{
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strcpy (own_buf, "E00");
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return;
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}
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|
|
/* Over-estimate the necessary memory. Assume that every character
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in the library name must be escaped. */
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total_len = 64;
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for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
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total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name);
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document = malloc (total_len);
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strcpy (document, "<library-list>\n");
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p = document + strlen (document);
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for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
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{
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struct dll_info *dll = (struct dll_info *) dll_ptr;
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char *name;
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strcpy (p, " <library name=\"");
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p = p + strlen (p);
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name = xml_escape_text (dll->name);
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strcpy (p, name);
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|
free (name);
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p = p + strlen (p);
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strcpy (p, "\"><segment address=\"");
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p = p + strlen (p);
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sprintf (p, "0x%lx", (long) dll->base_addr);
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p = p + strlen (p);
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strcpy (p, "\"/></library>\n");
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p = p + strlen (p);
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}
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|
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strcpy (p, "</library-list>\n");
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total_len = strlen (document);
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if (len > PBUFSIZ - 2)
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len = PBUFSIZ - 2;
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|
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if (ofs > total_len)
|
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write_enn (own_buf);
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else if (len < total_len - ofs)
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*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
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len, 1);
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else
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*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
|
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total_len - ofs, 0);
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|
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free (document);
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return;
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}
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|
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/* Protocol features query. */
|
|
if (strncmp ("qSupported", own_buf, 10) == 0
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&& (own_buf[10] == ':' || own_buf[10] == '\0'))
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{
|
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sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1);
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|
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/* We do not have any hook to indicate whether the target backend
|
|
supports qXfer:libraries:read, so always report it. */
|
|
strcat (own_buf, ";qXfer:libraries:read+");
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|
|
if (the_target->read_auxv != NULL)
|
|
strcat (own_buf, ";qXfer:auxv:read+");
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|
|
if (the_target->qxfer_spu != NULL)
|
|
strcat (own_buf, ";qXfer:spu:read+;qXfer:spu:write+");
|
|
|
|
if (get_features_xml ("target.xml") != NULL)
|
|
strcat (own_buf, ";qXfer:features: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[3], address = 0;
|
|
int i, err;
|
|
|
|
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;
|
|
}
|
|
|
|
decode_address (&parts[i], p, len);
|
|
p = p2;
|
|
}
|
|
|
|
if (p != NULL || i < 3)
|
|
err = 1;
|
|
else
|
|
{
|
|
struct thread_info *thread = gdb_id_to_thread (parts[0]);
|
|
|
|
if (thread == NULL)
|
|
err = 2;
|
|
else
|
|
err = the_target->get_tls_address (thread, parts[1], parts[2],
|
|
&address);
|
|
}
|
|
|
|
if (err == 0)
|
|
{
|
|
sprintf (own_buf, "%llx", address);
|
|
return;
|
|
}
|
|
else if (err > 0)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
/* Otherwise, pretend we do not understand this packet. */
|
|
}
|
|
|
|
/* Handle "monitor" commands. */
|
|
if (strncmp ("qRcmd,", own_buf, 6) == 0)
|
|
{
|
|
char *mon = malloc (PBUFSIZ);
|
|
int len = strlen (own_buf + 6);
|
|
|
|
if ((len % 1) != 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 (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 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
|
|
{
|
|
monitor_output ("Unknown monitor command.\n\n");
|
|
monitor_show_help ();
|
|
write_enn (own_buf);
|
|
}
|
|
|
|
free (mon);
|
|
return;
|
|
}
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
}
|
|
|
|
/* Parse vCont packets. */
|
|
void
|
|
handle_v_cont (char *own_buf, char *status, int *signal)
|
|
{
|
|
char *p, *q;
|
|
int n = 0, i = 0;
|
|
struct thread_resume *resume_info, default_action;
|
|
|
|
/* 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, ';');
|
|
}
|
|
/* Allocate room for one extra action, for the default remain-stopped
|
|
behavior; if no default action is in the list, we'll need the extra
|
|
slot. */
|
|
resume_info = malloc ((n + 1) * sizeof (resume_info[0]));
|
|
|
|
default_action.thread = -1;
|
|
default_action.leave_stopped = 1;
|
|
default_action.step = 0;
|
|
default_action.sig = 0;
|
|
|
|
p = &own_buf[5];
|
|
i = 0;
|
|
while (*p)
|
|
{
|
|
p++;
|
|
|
|
resume_info[i].leave_stopped = 0;
|
|
|
|
if (p[0] == 's' || p[0] == 'S')
|
|
resume_info[i].step = 1;
|
|
else if (p[0] == 'c' || p[0] == 'C')
|
|
resume_info[i].step = 0;
|
|
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 (!target_signal_to_host_p (sig))
|
|
goto err;
|
|
resume_info[i].sig = target_signal_to_host (sig);
|
|
}
|
|
else
|
|
{
|
|
resume_info[i].sig = 0;
|
|
p = p + 1;
|
|
}
|
|
|
|
if (p[0] == 0)
|
|
{
|
|
resume_info[i].thread = -1;
|
|
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] == ':')
|
|
{
|
|
unsigned int gdb_id = strtoul (p + 1, &q, 16);
|
|
unsigned long thread_id;
|
|
|
|
if (p == q)
|
|
goto err;
|
|
p = q;
|
|
if (p[0] != ';' && p[0] != 0)
|
|
goto err;
|
|
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (thread_id)
|
|
resume_info[i].thread = thread_id;
|
|
else
|
|
goto err;
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
resume_info[i] = default_action;
|
|
|
|
/* Still used in occasional places in the backend. */
|
|
if (n == 1 && resume_info[0].thread != -1)
|
|
cont_thread = resume_info[0].thread;
|
|
else
|
|
cont_thread = -1;
|
|
set_desired_inferior (0);
|
|
|
|
(*the_target->resume) (resume_info);
|
|
|
|
free (resume_info);
|
|
|
|
*signal = mywait (status, 1);
|
|
prepare_resume_reply (own_buf, *status, *signal);
|
|
return;
|
|
|
|
err:
|
|
write_enn (own_buf);
|
|
free (resume_info);
|
|
return;
|
|
}
|
|
|
|
/* Handle all of the extended 'v' packets. */
|
|
void
|
|
handle_v_requests (char *own_buf, char *status, int *signal)
|
|
{
|
|
if (strncmp (own_buf, "vCont;", 6) == 0)
|
|
{
|
|
handle_v_cont (own_buf, status, signal);
|
|
return;
|
|
}
|
|
|
|
if (strncmp (own_buf, "vCont?", 6) == 0)
|
|
{
|
|
strcpy (own_buf, "vCont;c;C;s;S");
|
|
return;
|
|
}
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
return;
|
|
}
|
|
|
|
void
|
|
myresume (int step, int sig)
|
|
{
|
|
struct thread_resume resume_info[2];
|
|
int n = 0;
|
|
|
|
if (step || sig || (cont_thread != 0 && cont_thread != -1))
|
|
{
|
|
resume_info[0].thread
|
|
= ((struct inferior_list_entry *) current_inferior)->id;
|
|
resume_info[0].step = step;
|
|
resume_info[0].sig = sig;
|
|
resume_info[0].leave_stopped = 0;
|
|
n++;
|
|
}
|
|
resume_info[n].thread = -1;
|
|
resume_info[n].step = 0;
|
|
resume_info[n].sig = 0;
|
|
resume_info[n].leave_stopped = (cont_thread != 0 && cont_thread != -1);
|
|
|
|
(*the_target->resume) (resume_info);
|
|
}
|
|
|
|
static int attached;
|
|
|
|
static void
|
|
gdbserver_version (void)
|
|
{
|
|
printf ("GNU gdbserver %s\n"
|
|
"Copyright (C) 2007 Free Software Foundation, Inc.\n"
|
|
"gdbserver is free software, covered by the GNU General Public License.\n"
|
|
"This gdbserver was configured as \"%s\"\n",
|
|
version, host_name);
|
|
}
|
|
|
|
static void
|
|
gdbserver_usage (void)
|
|
{
|
|
printf ("Usage:\tgdbserver COMM PROG [ARGS ...]\n"
|
|
"\tgdbserver COMM --attach PID\n"
|
|
"\n"
|
|
"COMM may either be a tty device (for serial debugging), or \n"
|
|
"HOST:PORT to listen for a TCP connection.\n");
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
char ch, status, *own_buf;
|
|
unsigned char *mem_buf;
|
|
int i = 0;
|
|
int signal;
|
|
unsigned int len;
|
|
CORE_ADDR mem_addr;
|
|
int bad_attach;
|
|
int pid;
|
|
char *arg_end;
|
|
|
|
if (argc >= 2 && strcmp (argv[1], "--version") == 0)
|
|
{
|
|
gdbserver_version ();
|
|
exit (0);
|
|
}
|
|
|
|
if (argc >= 2 && strcmp (argv[1], "--help") == 0)
|
|
{
|
|
gdbserver_usage ();
|
|
exit (0);
|
|
}
|
|
|
|
if (setjmp (toplevel))
|
|
{
|
|
fprintf (stderr, "Exiting\n");
|
|
exit (1);
|
|
}
|
|
|
|
bad_attach = 0;
|
|
pid = 0;
|
|
attached = 0;
|
|
if (argc >= 3 && strcmp (argv[2], "--attach") == 0)
|
|
{
|
|
if (argc == 4
|
|
&& argv[3][0] != '\0'
|
|
&& (pid = strtoul (argv[3], &arg_end, 10)) != 0
|
|
&& *arg_end == '\0')
|
|
{
|
|
;
|
|
}
|
|
else
|
|
bad_attach = 1;
|
|
}
|
|
|
|
if (argc < 3 || bad_attach)
|
|
{
|
|
gdbserver_usage ();
|
|
exit (1);
|
|
}
|
|
|
|
initialize_low ();
|
|
|
|
own_buf = malloc (PBUFSIZ + 1);
|
|
mem_buf = malloc (PBUFSIZ);
|
|
|
|
if (pid == 0)
|
|
{
|
|
/* Wait till we are at first instruction in program. */
|
|
signal = start_inferior (&argv[2], &status);
|
|
|
|
/* We are now (hopefully) stopped at the first instruction of
|
|
the target process. This assumes that the target process was
|
|
successfully created. */
|
|
|
|
/* Don't report shared library events on the initial connection,
|
|
even if some libraries are preloaded. */
|
|
dlls_changed = 0;
|
|
}
|
|
else
|
|
{
|
|
switch (attach_inferior (pid, &status, &signal))
|
|
{
|
|
case -1:
|
|
error ("Attaching not supported on this target");
|
|
break;
|
|
default:
|
|
attached = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (setjmp (toplevel))
|
|
{
|
|
fprintf (stderr, "Killing inferior\n");
|
|
kill_inferior ();
|
|
exit (1);
|
|
}
|
|
|
|
if (status == 'W' || status == 'X')
|
|
{
|
|
fprintf (stderr, "No inferior, GDBserver exiting.\n");
|
|
exit (1);
|
|
}
|
|
|
|
while (1)
|
|
{
|
|
remote_open (argv[1]);
|
|
|
|
restart:
|
|
setjmp (toplevel);
|
|
while (1)
|
|
{
|
|
unsigned char sig;
|
|
int packet_len;
|
|
int new_packet_len = -1;
|
|
|
|
packet_len = getpkt (own_buf);
|
|
if (packet_len <= 0)
|
|
break;
|
|
|
|
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':
|
|
fprintf (stderr, "Detaching from inferior\n");
|
|
if (detach_inferior () != 0)
|
|
{
|
|
write_enn (own_buf);
|
|
putpkt (own_buf);
|
|
}
|
|
else
|
|
{
|
|
write_ok (own_buf);
|
|
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. */
|
|
if (!attached)
|
|
join_inferior ();
|
|
|
|
exit (0);
|
|
}
|
|
case '!':
|
|
if (attached == 0)
|
|
{
|
|
extended_protocol = 1;
|
|
prepare_resume_reply (own_buf, status, signal);
|
|
}
|
|
else
|
|
{
|
|
/* We can not use the extended protocol if we are
|
|
attached, because we can not restart the running
|
|
program. So return unrecognized. */
|
|
own_buf[0] = '\0';
|
|
}
|
|
break;
|
|
case '?':
|
|
prepare_resume_reply (own_buf, status, signal);
|
|
break;
|
|
case 'H':
|
|
if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
|
|
{
|
|
unsigned long gdb_id, thread_id;
|
|
|
|
gdb_id = strtoul (&own_buf[2], NULL, 16);
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (thread_id == 0)
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
|
|
if (own_buf[1] == 'g')
|
|
{
|
|
general_thread = thread_id;
|
|
set_desired_inferior (1);
|
|
}
|
|
else if (own_buf[1] == 'c')
|
|
cont_thread = thread_id;
|
|
else if (own_buf[1] == 's')
|
|
step_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':
|
|
set_desired_inferior (1);
|
|
registers_to_string (own_buf);
|
|
break;
|
|
case 'G':
|
|
set_desired_inferior (1);
|
|
registers_from_string (&own_buf[1]);
|
|
write_ok (own_buf);
|
|
break;
|
|
case 'm':
|
|
decode_m_packet (&own_buf[1], &mem_addr, &len);
|
|
if (read_inferior_memory (mem_addr, mem_buf, len) == 0)
|
|
convert_int_to_ascii (mem_buf, own_buf, len);
|
|
else
|
|
write_enn (own_buf);
|
|
break;
|
|
case 'M':
|
|
decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf);
|
|
if (write_inferior_memory (mem_addr, mem_buf, len) == 0)
|
|
write_ok (own_buf);
|
|
else
|
|
write_enn (own_buf);
|
|
break;
|
|
case 'X':
|
|
if (decode_X_packet (&own_buf[1], packet_len - 1,
|
|
&mem_addr, &len, mem_buf) < 0
|
|
|| write_inferior_memory (mem_addr, mem_buf, len) != 0)
|
|
write_enn (own_buf);
|
|
else
|
|
write_ok (own_buf);
|
|
break;
|
|
case 'C':
|
|
convert_ascii_to_int (own_buf + 1, &sig, 1);
|
|
if (target_signal_to_host_p (sig))
|
|
signal = target_signal_to_host (sig);
|
|
else
|
|
signal = 0;
|
|
set_desired_inferior (0);
|
|
myresume (0, signal);
|
|
signal = mywait (&status, 1);
|
|
prepare_resume_reply (own_buf, status, signal);
|
|
break;
|
|
case 'S':
|
|
convert_ascii_to_int (own_buf + 1, &sig, 1);
|
|
if (target_signal_to_host_p (sig))
|
|
signal = target_signal_to_host (sig);
|
|
else
|
|
signal = 0;
|
|
set_desired_inferior (0);
|
|
myresume (1, signal);
|
|
signal = mywait (&status, 1);
|
|
prepare_resume_reply (own_buf, status, signal);
|
|
break;
|
|
case 'c':
|
|
set_desired_inferior (0);
|
|
myresume (0, 0);
|
|
signal = mywait (&status, 1);
|
|
prepare_resume_reply (own_buf, status, signal);
|
|
break;
|
|
case 's':
|
|
set_desired_inferior (0);
|
|
myresume (1, 0);
|
|
signal = mywait (&status, 1);
|
|
prepare_resume_reply (own_buf, status, signal);
|
|
break;
|
|
case 'Z':
|
|
{
|
|
char *lenptr;
|
|
char *dataptr;
|
|
CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
|
|
int len = strtol (lenptr + 1, &dataptr, 16);
|
|
char type = own_buf[1];
|
|
|
|
if (the_target->insert_watchpoint == NULL
|
|
|| (type < '2' || type > '4'))
|
|
{
|
|
/* No watchpoint support or not a watchpoint command;
|
|
unrecognized either way. */
|
|
own_buf[0] = '\0';
|
|
}
|
|
else
|
|
{
|
|
int res;
|
|
|
|
res = (*the_target->insert_watchpoint) (type, addr, len);
|
|
if (res == 0)
|
|
write_ok (own_buf);
|
|
else if (res == 1)
|
|
/* Unsupported. */
|
|
own_buf[0] = '\0';
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
break;
|
|
}
|
|
case 'z':
|
|
{
|
|
char *lenptr;
|
|
char *dataptr;
|
|
CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
|
|
int len = strtol (lenptr + 1, &dataptr, 16);
|
|
char type = own_buf[1];
|
|
|
|
if (the_target->remove_watchpoint == NULL
|
|
|| (type < '2' || type > '4'))
|
|
{
|
|
/* No watchpoint support or not a watchpoint command;
|
|
unrecognized either way. */
|
|
own_buf[0] = '\0';
|
|
}
|
|
else
|
|
{
|
|
int res;
|
|
|
|
res = (*the_target->remove_watchpoint) (type, addr, len);
|
|
if (res == 0)
|
|
write_ok (own_buf);
|
|
else if (res == 1)
|
|
/* Unsupported. */
|
|
own_buf[0] = '\0';
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
break;
|
|
}
|
|
case 'k':
|
|
fprintf (stderr, "Killing inferior\n");
|
|
kill_inferior ();
|
|
/* When using the extended protocol, we start up a new
|
|
debugging session. The traditional protocol will
|
|
exit instead. */
|
|
if (extended_protocol)
|
|
{
|
|
write_ok (own_buf);
|
|
fprintf (stderr, "GDBserver restarting\n");
|
|
|
|
/* Wait till we are at 1st instruction in prog. */
|
|
signal = start_inferior (&argv[2], &status);
|
|
goto restart;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
exit (0);
|
|
break;
|
|
}
|
|
case 'T':
|
|
{
|
|
unsigned long gdb_id, thread_id;
|
|
|
|
gdb_id = strtoul (&own_buf[1], NULL, 16);
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (thread_id == 0)
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
|
|
if (mythread_alive (thread_id))
|
|
write_ok (own_buf);
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
break;
|
|
case 'R':
|
|
/* Restarting the inferior is only supported in the
|
|
extended protocol. */
|
|
if (extended_protocol)
|
|
{
|
|
kill_inferior ();
|
|
write_ok (own_buf);
|
|
fprintf (stderr, "GDBserver restarting\n");
|
|
|
|
/* Wait till we are at 1st instruction in prog. */
|
|
signal = start_inferior (&argv[2], &status);
|
|
goto restart;
|
|
break;
|
|
}
|
|
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, &status, &signal);
|
|
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);
|
|
|
|
if (status == 'W')
|
|
fprintf (stderr,
|
|
"\nChild exited with status %d\n", signal);
|
|
if (status == 'X')
|
|
fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",
|
|
target_signal_to_host (signal),
|
|
target_signal_to_name (signal));
|
|
if (status == 'W' || status == 'X')
|
|
{
|
|
if (extended_protocol)
|
|
{
|
|
fprintf (stderr, "Killing inferior\n");
|
|
kill_inferior ();
|
|
write_ok (own_buf);
|
|
fprintf (stderr, "GDBserver restarting\n");
|
|
|
|
/* Wait till we are at 1st instruction in prog. */
|
|
signal = start_inferior (&argv[2], &status);
|
|
goto restart;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "GDBserver exiting\n");
|
|
exit (0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We come here when getpkt fails.
|
|
|
|
For the extended remote protocol we exit (and this is the only
|
|
way we gracefully exit!).
|
|
|
|
For the traditional remote protocol close the connection,
|
|
and re-open it at the top of the loop. */
|
|
if (extended_protocol)
|
|
{
|
|
remote_close ();
|
|
exit (0);
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Remote side has terminated connection. "
|
|
"GDBserver will reopen the connection.\n");
|
|
remote_close ();
|
|
}
|
|
}
|
|
}
|