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old-cross-binutils/gdb/gdbserver/server.c
Daniel Jacobowitz 27524b67e1 * server.c (myresume): Add own_buf argument. 
(main): Update calls.
2007-12-07 14:00:37 +00:00

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/* Main code for remote server for GDB.
Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003,
2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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 3 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_SIGNAL_H
#include <signal.h>
#endif
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
unsigned long cont_thread;
unsigned long general_thread;
unsigned long step_thread;
unsigned long thread_from_wait;
unsigned long old_thread_from_wait;
int extended_protocol;
int server_waiting;
/* Enable miscellaneous debugging output. The name is historical - it
was originally used to debug LinuxThreads support. */
int debug_threads;
int pass_signals[TARGET_SIGNAL_LAST];
jmp_buf toplevel;
/* The PID of the originally created or attached inferior. Used to
send signals to the process when GDB sends us an asynchronous interrupt
(user hitting Control-C in the client), and to wait for the child to exit
when no longer debugging it. */
unsigned long signal_pid;
#ifdef SIGTTOU
/* A file descriptor for the controlling terminal. */
int terminal_fd;
/* TERMINAL_FD's original foreground group. */
pid_t old_foreground_pgrp;
/* Hand back terminal ownership to the original foreground group. */
static void
restore_old_foreground_pgrp (void)
{
tcsetpgrp (terminal_fd, old_foreground_pgrp);
}
#endif
static int
start_inferior (char *argv[], char *statusptr)
{
#ifdef SIGTTOU
signal (SIGTTOU, SIG_DFL);
signal (SIGTTIN, SIG_DFL);
#endif
signal_pid = create_inferior (argv[0], argv);
/* FIXME: we don't actually know at this point that the create
actually succeeded. We won't know that until we wait. */
fprintf (stderr, "Process %s created; pid = %ld\n", argv[0],
signal_pid);
fflush (stderr);
#ifdef SIGTTOU
signal (SIGTTOU, SIG_IGN);
signal (SIGTTIN, SIG_IGN);
terminal_fd = fileno (stderr);
old_foreground_pgrp = tcgetpgrp (terminal_fd);
tcsetpgrp (terminal_fd, signal_pid);
atexit (restore_old_foreground_pgrp);
#endif
/* Wait till we are at 1st instruction in program, return signal
number (assuming success). */
return mywait (statusptr, 0);
}
static int
attach_inferior (int pid, char *statusptr, int *sigptr)
{
/* myattach should return -1 if attaching is unsupported,
0 if it succeeded, and call error() otherwise. */
if (myattach (pid) != 0)
return -1;
fprintf (stderr, "Attached; pid = %d\n", pid);
fflush (stderr);
/* FIXME - It may be that we should get the SIGNAL_PID from the
attach function, so that it can be the main thread instead of
whichever we were told to attach to. */
signal_pid = pid;
*sigptr = mywait (statusptr, 0);
/* GDB knows to ignore the first SIGSTOP after attaching to a running
process using the "attach" command, but this is different; it's
just using "target remote". Pretend it's just starting up. */
if (*statusptr == 'T' && *sigptr == TARGET_SIGNAL_STOP)
*sigptr = TARGET_SIGNAL_TRAP;
return 0;
}
extern int remote_debug;
/* Decode a qXfer read request. Return 0 if everything looks OK,
or -1 otherwise. */
static int
decode_xfer_read (char *buf, char **annex, CORE_ADDR *ofs, unsigned int *len)
{
/* Extract and NUL-terminate the annex. */
*annex = buf;
while (*buf && *buf != ':')
buf++;
if (*buf == '\0')
return -1;
*buf++ = 0;
/* After the read marker and annex, qXfer looks like a
traditional 'm' packet. */
decode_m_packet (buf, ofs, len);
return 0;
}
/* Write the response to a successful qXfer read. Returns the
length of the (binary) data stored in BUF, corresponding
to as much of DATA/LEN as we could fit. IS_MORE controls
the first character of the response. */
static int
write_qxfer_response (char *buf, const void *data, int len, int is_more)
{
int out_len;
if (is_more)
buf[0] = 'm';
else
buf[0] = 'l';
return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len,
PBUFSIZ - 2) + 1;
}
/* Handle all of the extended 'Q' packets. */
void
handle_general_set (char *own_buf)
{
if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0)
{
int numsigs = (int) TARGET_SIGNAL_LAST, i;
const char *p = own_buf + strlen ("QPassSignals:");
CORE_ADDR cursig;
p = decode_address_to_semicolon (&cursig, p);
for (i = 0; i < numsigs; i++)
{
if (i == cursig)
{
pass_signals[i] = 1;
if (*p == '\0')
/* Keep looping, to clear the remaining signals. */
cursig = -1;
else
p = decode_address_to_semicolon (&cursig, p);
}
else
pass_signals[i] = 0;
}
strcpy (own_buf, "OK");
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)
{
static int features_supported = -1;
static char *document;
#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
if (strcmp (annex, "target.xml") != 0)
return NULL;
if (features_supported == -1)
{
const char *arch = NULL;
if (the_target->arch_string != NULL)
arch = (*the_target->arch_string) ();
if (arch == NULL)
features_supported = 0;
else
{
features_supported = 1;
document = malloc (64 + strlen (arch));
snprintf (document, 64 + strlen (arch),
"<target><architecture>%s</architecture></target>",
arch);
}
}
return document;
}
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 remote-debug <0|1>\n");
monitor_output (" Enable remote protocol debugging messages\n");
}
/* 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)
{
thread_ptr = all_threads.head;
sprintf (own_buf, "QC%x",
thread_to_gdb_id ((struct thread_info *)thread_ptr));
return;
}
if (strcmp ("qSymbol::", own_buf) == 0)
{
if (the_target->look_up_symbols != NULL)
(*the_target->look_up_symbols) ();
strcpy (own_buf, "OK");
return;
}
if (strcmp ("qfThreadInfo", own_buf) == 0)
{
thread_ptr = all_threads.head;
sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
thread_ptr = thread_ptr->next;
return;
}
if (strcmp ("qsThreadInfo", own_buf) == 0)
{
if (thread_ptr != NULL)
{
sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
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;
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;
}
if (the_target->qxfer_spu != NULL
&& strncmp ("qXfer:spu:read:", own_buf, 15) == 0)
{
char *annex;
int n;
unsigned int len;
CORE_ADDR ofs;
unsigned char *spu_buf;
strcpy (own_buf, "E00");
if (decode_xfer_read (own_buf + 15, &annex, &ofs, &len) < 0)
return;
if (len > PBUFSIZ - 2)
len = PBUFSIZ - 2;
spu_buf = malloc (len + 1);
if (!spu_buf)
return;
n = (*the_target->qxfer_spu) (annex, spu_buf, NULL, ofs, len + 1);
if (n < 0)
write_enn (own_buf);
else if (n > len)
*new_packet_len_p = write_qxfer_response
(own_buf, spu_buf, len, 1);
else
*new_packet_len_p = write_qxfer_response
(own_buf, spu_buf, n, 0);
free (spu_buf);
return;
}
if (the_target->qxfer_spu != NULL
&& strncmp ("qXfer:spu:write:", own_buf, 16) == 0)
{
char *annex;
int n;
unsigned int len;
CORE_ADDR ofs;
unsigned char *spu_buf;
strcpy (own_buf, "E00");
spu_buf = malloc (packet_len - 15);
if (!spu_buf)
return;
if (decode_xfer_write (own_buf + 16, packet_len - 16, &annex,
&ofs, &len, spu_buf) < 0)
{
free (spu_buf);
return;
}
n = (*the_target->qxfer_spu)
(annex, NULL, (unsigned const char *)spu_buf, ofs, len);
if (n < 0)
write_enn (own_buf);
else
sprintf (own_buf, "%x", n);
free (spu_buf);
return;
}
if (the_target->read_auxv != NULL
&& strncmp ("qXfer:auxv:read:", own_buf, 16) == 0)
{
unsigned char *data;
int n;
CORE_ADDR ofs;
unsigned int len;
char *annex;
/* Reject any annex; grab the offset and length. */
if (decode_xfer_read (own_buf + 16, &annex, &ofs, &len) < 0
|| annex[0] != '\0')
{
strcpy (own_buf, "E00");
return;
}
/* Read one extra byte, as an indicator of whether there is
more. */
if (len > PBUFSIZ - 2)
len = PBUFSIZ - 2;
data = malloc (len + 1);
n = (*the_target->read_auxv) (ofs, data, len + 1);
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;
}
if (strncmp ("qXfer:features:read:", own_buf, 20) == 0)
{
CORE_ADDR ofs;
unsigned int len, total_len;
const char *document;
char *annex;
/* Check for support. */
document = get_features_xml ("target.xml");
if (document == NULL)
{
own_buf[0] = '\0';
return;
}
/* Grab the annex, offset, and length. */
if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0)
{
strcpy (own_buf, "E00");
return;
}
/* Now grab the correct annex. */
document = get_features_xml (annex);
if (document == NULL)
{
strcpy (own_buf, "E00");
return;
}
total_len = strlen (document);
if (len > PBUFSIZ - 2)
len = PBUFSIZ - 2;
if (ofs > total_len)
write_enn (own_buf);
else if (len < total_len - ofs)
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
len, 1);
else
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
total_len - ofs, 0);
return;
}
if (strncmp ("qXfer:libraries:read:", own_buf, 21) == 0)
{
CORE_ADDR ofs;
unsigned int len, total_len;
char *document, *p;
struct inferior_list_entry *dll_ptr;
char *annex;
/* Reject any annex; grab the offset and length. */
if (decode_xfer_read (own_buf + 21, &annex, &ofs, &len) < 0
|| annex[0] != '\0')
{
strcpy (own_buf, "E00");
return;
}
/* 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);
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 (len > PBUFSIZ - 2)
len = PBUFSIZ - 2;
if (ofs > total_len)
write_enn (own_buf);
else if (len < total_len - ofs)
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
len, 1);
else
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
total_len - ofs, 0);
free (document);
return;
}
/* Protocol features query. */
if (strncmp ("qSupported", own_buf, 10) == 0
&& (own_buf[10] == ':' || own_buf[10] == '\0'))
{
sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1);
/* 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+");
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 (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);
enable_async_io ();
(*the_target->resume) (resume_info);
free (resume_info);
*signal = mywait (status, 1);
prepare_resume_reply (own_buf, *status, *signal);
disable_async_io ();
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,
int packet_len, int *new_packet_len)
{
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;
}
if (strncmp (own_buf, "vFile:", 6) == 0
&& handle_vFile (own_buf, packet_len, new_packet_len))
return;
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
return;
}
void
myresume (char *own_buf, int step, int *signalp, char *statusp)
{
struct thread_resume resume_info[2];
int n = 0;
int sig = *signalp;
set_desired_inferior (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);
enable_async_io ();
(*the_target->resume) (resume_info);
*signalp = mywait (statusp, 1);
prepare_resume_reply (own_buf, *statusp, *signalp);
disable_async_io ();
}
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, 0)) != 0
&& *arg_end == '\0')
{
;
}
else
bad_attach = 1;
}
if (argc < 3 || bad_attach)
{
gdbserver_usage ();
exit (1);
}
initialize_async_io ();
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. */
}
else
{
switch (attach_inferior (pid, &status, &signal))
{
case -1:
error ("Attaching not supported on this target");
break;
default:
attached = 1;
break;
}
}
/* 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))
{
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);
disable_async_io ();
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;
myresume (own_buf, 0, &signal, &status);
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 (own_buf, 1, &signal, &status);
break;
case 'c':
signal = 0;
myresume (own_buf, 0, &signal, &status);
break;
case 's':
signal = 0;
myresume (own_buf, 1, &signal, &status);
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,
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);
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 ();
}
}
}
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