/* Main code for remote server for GDB.
- Copyright (C) 1989, 1993 Free Software Foundation, Inc.
+ Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "server.h"
-main (argc, argv)
- int argc;
- char *argv[];
+int cont_thread;
+int general_thread;
+int thread_from_wait;
+int old_thread_from_wait;
+int extended_protocol;
+jmp_buf toplevel;
+int inferior_pid;
+
+static unsigned char
+start_inferior (char *argv[], char *statusptr)
+{
+ inferior_pid = create_inferior (argv[0], argv);
+ fprintf (stderr, "Process %s created; pid = %d\n", argv[0], inferior_pid);
+
+ /* Wait till we are at 1st instruction in program, return signal number. */
+ return mywait (statusptr);
+}
+
+static int
+attach_inferior (int pid, char *statusptr, unsigned char *sigptr)
+{
+ /* myattach should return -1 if attaching is unsupported,
+ 0 if it succeeded, and call error() otherwise. */
+ if (myattach (pid) != 0)
+ return -1;
+
+ inferior_pid = pid;
+
+ *sigptr = mywait (statusptr);
+
+ return 0;
+}
+
+extern int remote_debug;
+
+int
+main (int argc, char *argv[])
{
- char ch, status, own_buf[2000], mem_buf[2000];
+ char ch, status, *own_buf, mem_buf[2000];
int i = 0;
unsigned char signal;
- unsigned int mem_addr, len;
+ unsigned int len;
+ CORE_ADDR mem_addr;
+ int bad_attach = 0;
+ int pid = 0;
+ int attached = 0;
+ char *arg_end;
+
+ if (setjmp (toplevel))
+ {
+ fprintf (stderr, "Exiting\n");
+ exit (1);
+ }
- if (setjmp(toplevel))
+ if (argc >= 3 && strcmp (argv[2], "--attach") == 0)
{
- fprintf(stderr, "Exiting\n");
- exit(1);
+ if (argc == 4
+ && argv[3] != '\0'
+ && (pid = strtoul (argv[3], &arg_end, 10)) != 0
+ && *arg_end == '\0')
+ {
+ ;
+ }
+ else
+ bad_attach = 1;
}
- if (argc < 3)
- error("Usage: gdbserver tty prog [args ...]");
+ if (argc < 3 || bad_attach)
+ error ("Usage:\tgdbserver tty prog [args ...]\n"
+ "\tgdbserver tty --attach pid");
- inferior_pid = create_inferior (argv[2], &argv[2]);
- fprintf (stderr, "Process %s created; pid = %d\n", argv[2], inferior_pid);
+ initialize_low ();
- signal = mywait (&status); /* Wait till we are at 1st instr in prog */
+ own_buf = malloc (PBUFSIZ);
- /* We are now stopped at the first instruction of the target process */
+ if (pid == 0)
+ {
+ /* Wait till we are at first instruction in program. */
+ signal = start_inferior (&argv[2], &status);
+
+ /* We are now stopped at the first instruction of the target process */
+ }
+ else
+ {
+ switch (attach_inferior (pid, &status, &signal))
+ {
+ case -1:
+ error ("Attaching not supported on this target");
+ break;
+ default:
+ attached = 1;
+ break;
+ }
+ }
while (1)
{
remote_open (argv[1]);
- setjmp(toplevel);
+ restart:
+ setjmp (toplevel);
while (getpkt (own_buf) > 0)
{
+ unsigned char sig;
i = 0;
ch = own_buf[i++];
switch (ch)
{
+ case 'd':
+ remote_debug = !remote_debug;
+ break;
+ 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':
+ switch (own_buf[1])
+ {
+ case 'g':
+ general_thread = strtol (&own_buf[2], NULL, 16);
+ write_ok (own_buf);
+ fetch_inferior_registers (0);
+ break;
+ case 'c':
+ cont_thread = strtol (&own_buf[2], NULL, 16);
+ write_ok (own_buf);
+ break;
+ default:
+ /* Silently ignore it so that gdb can extend the protocol
+ without compatibility headaches. */
+ own_buf[0] = '\0';
+ break;
+ }
+ break;
case 'g':
- convert_int_to_ascii (registers, own_buf, REGISTER_BYTES);
+ registers_to_string (own_buf);
break;
case 'G':
- convert_ascii_to_int (&own_buf[1], registers, REGISTER_BYTES);
+ registers_from_string (&own_buf[1]);
store_inferior_registers (-1);
write_ok (own_buf);
break;
else
write_enn (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;
+ myresume (0, signal);
+ signal = mywait (&status);
+ 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;
+ myresume (1, signal);
+ signal = mywait (&status);
+ prepare_resume_reply (own_buf, status, signal);
+ break;
case 'c':
myresume (0, 0);
signal = mywait (&status);
case 'k':
fprintf (stderr, "Killing inferior\n");
kill_inferior ();
- inferior_pid = create_inferior (argv[2], &argv[2]);
- fprintf (stderr, "Process %s created; pid = %d\n", argv[2],
- inferior_pid);
- signal = mywait (&status); /* Wait till we are at 1st instr in prog */
- break;
- case 'q':
- own_buf[0] = '\0';
+ /* 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':
+ if (mythread_alive (strtol (&own_buf[1], NULL, 16)))
+ 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;
+ }
default:
- printf ("\nUnknown option chosen by master\n");
- write_enn (own_buf);
+ /* 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;
}
putpkt (own_buf);
+
+ if (status == 'W')
+ fprintf (stderr,
+ "\nChild exited with status %d\n", sig);
+ if (status == 'X')
+ fprintf (stderr, "\nChild terminated with signal = 0x%x\n", sig);
+ 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. Close the connection, and re-open it
- at the top of the loop. */
+ /* We come here when getpkt fails.
- fprintf (stderr, "Remote side has terminated connection. GDBserver will reopen the connection.\n");
+ For the extended remote protocol we exit (and this is the only
+ way we gracefully exit!).
- remote_close ();
+ 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 ();
+ }
}
}
projects / binutils-gdb.git / blobdiff