/* Main code for remote server for GDB.
- Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002
- Free Software Foundation, Inc.
+ 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.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "server.h"
#include <unistd.h>
#include <signal.h>
+#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
+#endif
-int cont_thread;
-int general_thread;
-int step_thread;
-int thread_from_wait;
-int old_thread_from_wait;
+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;
+int pass_signals[TARGET_SIGNAL_LAST];
+
jmp_buf toplevel;
/* The PID of the originally created or attached inferior. Used to
(user hitting Control-C in the client), and to wait for the child to exit
when no longer debugging it. */
-int signal_pid;
+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;
-static unsigned char
+/* 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);
- fprintf (stderr, "Process %s created; pid = %d\n", argv[0],
+ fprintf (stderr, "Process %s created; pid = %ld\n", argv[0],
signal_pid);
+ fflush (stderr);
+#ifdef SIGTTOU
signal (SIGTTOU, SIG_IGN);
signal (SIGTTIN, SIG_IGN);
- tcsetpgrp (fileno (stderr), signal_pid);
+ 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. */
return mywait (statusptr, 0);
}
static int
-attach_inferior (int pid, char *statusptr, unsigned char *sigptr)
+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. */
*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/write 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 (void)
+{
+ static int features_supported = -1;
+ static char *document;
+
+ if (features_supported == -1)
+ {
+ const char *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;
+}
+
/* Handle all of the extended 'q' packets. */
void
-handle_query (char *own_buf)
+handle_query (char *own_buf, int *new_packet_len_p)
{
static struct inferior_list_entry *thread_ptr;
if (strcmp ("qfThreadInfo", own_buf) == 0)
{
thread_ptr = all_threads.head;
- sprintf (own_buf, "m%x", thread_ptr->id);
+ sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
thread_ptr = thread_ptr->next;
return;
}
{
if (thread_ptr != NULL)
{
- sprintf (own_buf, "m%x", thread_ptr->id);
+ sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
thread_ptr = thread_ptr->next;
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->read_auxv != NULL
- && strncmp ("qPart:auxv:read::", own_buf, 17) == 0)
+ && strncmp ("qXfer:auxv:read:", own_buf, 16) == 0)
{
- char data[(PBUFSIZ - 1) / 2];
+ unsigned char *data;
+ int n;
CORE_ADDR ofs;
unsigned int len;
- int n;
- decode_m_packet (&own_buf[17], &ofs, &len); /* "OFS,LEN" */
- if (len > sizeof data)
- len = sizeof data;
- n = (*the_target->read_auxv) (ofs, data, len);
- if (n == 0)
- write_ok (own_buf);
- else if (n < 0)
+ 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;
+
+ document = get_features_xml ();
+ if (document == NULL)
+ {
+ own_buf[0] = '\0';
+ return;
+ }
+
+ /* Reject any annex other than target.xml; grab the offset and
+ length. */
+ if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0
+ || strcmp (annex, "target.xml") != 0)
+ {
+ 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
- convert_int_to_ascii (data, own_buf, n);
+ *new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
+ total_len - ofs, 0);
+
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);
+
+ if (the_target->read_auxv != NULL)
+ strcat (own_buf, ";qXfer:auxv:read+");
+
+ if (get_features_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. */
+ }
+
/* 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, unsigned char *signal)
+handle_v_cont (char *own_buf, char *status, int *signal)
{
char *p, *q;
int n = 0, i = 0;
}
else if (p[0] == ':')
{
- resume_info[i].thread = strtol (p + 1, &q, 16);
+ 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++;
}
}
cont_thread = resume_info[0].thread;
else
cont_thread = -1;
+ set_desired_inferior (0);
(*the_target->resume) (resume_info);
/* Handle all of the extended 'v' packets. */
void
-handle_v_requests (char *own_buf, char *status, unsigned char *signal)
+handle_v_requests (char *own_buf, char *status, int *signal)
{
if (strncmp (own_buf, "vCont;", 6) == 0)
{
struct thread_resume resume_info[2];
int n = 0;
- if (step || sig || cont_thread > 0)
+ if (step || sig || (cont_thread != 0 && cont_thread != -1))
{
resume_info[0].thread
= ((struct inferior_list_entry *) current_inferior)->id;
resume_info[n].thread = -1;
resume_info[n].step = 0;
resume_info[n].sig = 0;
- resume_info[n].leave_stopped = (cont_thread > 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) 2006 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)
{
- error ("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");
+ 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, mem_buf[2000];
+ char ch, status, *own_buf;
+ unsigned char *mem_buf;
int i = 0;
- unsigned char signal;
+ 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");
}
if (argc < 3 || bad_attach)
- gdbserver_usage();
+ {
+ gdbserver_usage ();
+ exit (1);
+ }
initialize_low ();
own_buf = malloc (PBUFSIZ);
+ mem_buf = malloc (PBUFSIZ);
if (pid == 0)
{
}
}
+ if (setjmp (toplevel))
+ {
+ fprintf (stderr, "Killing inferior\n");
+ kill_inferior ();
+ exit (1);
+ }
+
while (1)
{
remote_open (argv[1]);
restart:
setjmp (toplevel);
- while (getpkt (own_buf) > 0)
+ 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);
+ handle_query (own_buf, &new_packet_len);
+ break;
+ case 'Q':
+ handle_general_set (own_buf);
break;
case 'd':
remote_debug = !remote_debug;
break;
+#ifndef USE_WIN32API
+ /* Skip "detach" support on mingw32, since we don't have
+ waitpid. */
case 'D':
fprintf (stderr, "Detaching from inferior\n");
detach_inferior ();
}
exit (0);
+#endif
case '!':
if (attached == 0)
prepare_resume_reply (own_buf, status, signal);
break;
case 'H':
- switch (own_buf[1])
+ if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
{
- case 'g':
- general_thread = strtol (&own_buf[2], NULL, 16);
- write_ok (own_buf);
- set_desired_inferior (1);
- break;
- case 'c':
- cont_thread = strtol (&own_buf[2], NULL, 16);
- write_ok (own_buf);
- break;
- case 's':
- step_thread = strtol (&own_buf[2], NULL, 16);
+ 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);
- break;
- default:
+ }
+ else
+ {
/* Silently ignore it so that gdb can extend the protocol
without compatibility headaches. */
own_buf[0] = '\0';
- break;
}
break;
case 'g':
break;
case 'm':
decode_m_packet (&own_buf[1], &mem_addr, &len);
- read_inferior_memory (mem_addr, mem_buf, len);
- convert_int_to_ascii (mem_buf, own_buf, 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);
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 = 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 ();
break;
}
case 'T':
- if (mythread_alive (strtol (&own_buf[1], NULL, 16)))
- write_ok (own_buf);
- else
- write_enn (own_buf);
+ {
+ 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
break;
}
- putpkt (own_buf);
+ 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", sig);
+ "\nChild exited with status %d\n", signal);
if (status == 'X')
- fprintf (stderr, "\nChild terminated with signal = 0x%x\n", sig);
+ 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)
projects / deliverable / binutils-gdb.git / blobdiff