/* 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.
+ 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 2 of the License, or
+ 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,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ 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
+#if HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+
+ptid_t cont_thread;
+ptid_t general_thread;
+ptid_t step_thread;
-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;
+static int extended_protocol;
+static int response_needed;
+static int exit_requested;
+
+int multi_process;
+int non_stop;
+
+static char **program_argv, **wrapper_argv;
+
/* Enable miscellaneous debugging output. The name is historical - it
was originally used to debug LinuxThreads support. */
int debug_threads;
+/* Enable debugging of h/w breakpoint/watchpoint support. */
+int debug_hw_points;
+
int pass_signals[TARGET_SIGNAL_LAST];
jmp_buf toplevel;
+const char *gdbserver_xmltarget;
+
/* 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
}
#endif
+/* Set if you want to disable optional thread related packets support
+ in gdbserver, for the sake of testing GDB against stubs that don't
+ support them. */
+int disable_packet_vCont;
+int disable_packet_Tthread;
+int disable_packet_qC;
+int disable_packet_qfThreadInfo;
+
+/* Last status reported to GDB. */
+static struct target_waitstatus last_status;
+static ptid_t last_ptid;
+
+static char *own_buf;
+static unsigned char *mem_buf;
+
+/* Structure holding information relative to a single stop reply. We
+ keep a queue of these (really a singly-linked list) to push to GDB
+ in non-stop mode. */
+struct vstop_notif
+{
+ /* Pointer to next in list. */
+ struct vstop_notif *next;
+
+ /* Thread or process that got the event. */
+ ptid_t ptid;
+
+ /* Event info. */
+ struct target_waitstatus status;
+};
+
+/* The pending stop replies list head. */
+static struct vstop_notif *notif_queue = NULL;
+
+/* Put a stop reply to the stop reply queue. */
+
+static void
+queue_stop_reply (ptid_t ptid, struct target_waitstatus *status)
+{
+ struct vstop_notif *new_notif;
+
+ new_notif = malloc (sizeof (*new_notif));
+ new_notif->next = NULL;
+ new_notif->ptid = ptid;
+ new_notif->status = *status;
+
+ if (notif_queue)
+ {
+ struct vstop_notif *tail;
+ for (tail = notif_queue;
+ tail && tail->next;
+ tail = tail->next)
+ ;
+ tail->next = new_notif;
+ }
+ else
+ notif_queue = new_notif;
+
+ if (remote_debug)
+ {
+ int i = 0;
+ struct vstop_notif *n;
+
+ for (n = notif_queue; n; n = n->next)
+ i++;
+
+ fprintf (stderr, "pending stop replies: %d\n", i);
+ }
+}
+
+/* Place an event in the stop reply queue, and push a notification if
+ we aren't sending one yet. */
+
+void
+push_event (ptid_t ptid, struct target_waitstatus *status)
+{
+ queue_stop_reply (ptid, status);
+
+ /* If this is the first stop reply in the queue, then inform GDB
+ about it, by sending a Stop notification. */
+ if (notif_queue->next == NULL)
+ {
+ char *p = own_buf;
+ strcpy (p, "Stop:");
+ p += strlen (p);
+ prepare_resume_reply (p,
+ notif_queue->ptid, ¬if_queue->status);
+ putpkt_notif (own_buf);
+ }
+}
+
+/* Get rid of the currently pending stop replies for PID. If PID is
+ -1, then apply to all processes. */
+
+static void
+discard_queued_stop_replies (int pid)
+{
+ struct vstop_notif *prev = NULL, *reply, *next;
+
+ for (reply = notif_queue; reply; reply = next)
+ {
+ next = reply->next;
+
+ if (pid == -1
+ || ptid_get_pid (reply->ptid) == pid)
+ {
+ if (reply == notif_queue)
+ notif_queue = next;
+ else
+ prev->next = reply->next;
+
+ free (reply);
+ }
+ else
+ prev = reply;
+ }
+}
+
+/* If there are more stop replies to push, push one now. */
+
+static void
+send_next_stop_reply (char *own_buf)
+{
+ if (notif_queue)
+ prepare_resume_reply (own_buf,
+ notif_queue->ptid,
+ ¬if_queue->status);
+ else
+ write_ok (own_buf);
+}
+
+static int
+target_running (void)
+{
+ return all_threads.head != NULL;
+}
+
static int
-start_inferior (char *argv[], char *statusptr)
+start_inferior (char **argv)
{
+ char **new_argv = argv;
+
+ if (wrapper_argv != NULL)
+ {
+ int i, count = 1;
+
+ for (i = 0; wrapper_argv[i] != NULL; i++)
+ count++;
+ for (i = 0; argv[i] != NULL; i++)
+ count++;
+ new_argv = alloca (sizeof (char *) * count);
+ count = 0;
+ for (i = 0; wrapper_argv[i] != NULL; i++)
+ new_argv[count++] = wrapper_argv[i];
+ for (i = 0; argv[i] != NULL; i++)
+ new_argv[count++] = argv[i];
+ new_argv[count] = NULL;
+ }
+
+ if (debug_threads)
+ {
+ int i;
+ for (i = 0; new_argv[i]; ++i)
+ fprintf (stderr, "new_argv[%d] = \"%s\"\n", i, new_argv[i]);
+ fflush (stderr);
+ }
+
#ifdef SIGTTOU
signal (SIGTTOU, SIG_DFL);
signal (SIGTTIN, SIG_DFL);
#endif
- signal_pid = create_inferior (argv[0], argv);
+ signal_pid = create_inferior (new_argv[0], new_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);
atexit (restore_old_foreground_pgrp);
#endif
- /* Wait till we are at 1st instruction in program, return signal number. */
- return mywait (statusptr, 0);
+ if (wrapper_argv != NULL)
+ {
+ struct thread_resume resume_info;
+ ptid_t ptid;
+
+ resume_info.thread = pid_to_ptid (signal_pid);
+ resume_info.kind = resume_continue;
+ resume_info.sig = 0;
+
+ ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+
+ if (last_status.kind != TARGET_WAITKIND_STOPPED)
+ return signal_pid;
+
+ do
+ {
+ (*the_target->resume) (&resume_info, 1);
+
+ mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+ if (last_status.kind != TARGET_WAITKIND_STOPPED)
+ return signal_pid;
+ }
+ while (last_status.value.sig != TARGET_SIGNAL_TRAP);
+
+ return signal_pid;
+ }
+
+ /* Wait till we are at 1st instruction in program, return new pid
+ (assuming success). */
+ last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+
+ return signal_pid;
}
static int
-attach_inferior (int pid, char *statusptr, int *sigptr)
+attach_inferior (int pid)
{
/* myattach should return -1 if attaching is unsupported,
0 if it succeeded, and call error() otherwise. */
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;
+ if (!non_stop)
+ {
+ last_ptid = mywait (pid_to_ptid (pid), &last_status, 0, 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 (last_status.kind == TARGET_WAITKIND_STOPPED
+ && last_status.value.sig == TARGET_SIGNAL_STOP)
+ last_status.value.sig = TARGET_SIGNAL_TRAP;
+ }
return 0;
}
return -1;
*buf++ = 0;
- /* After the read/write marker and annex, qXfer looks like a
+ /* After the read marker and annex, qXfer looks like a
traditional 'm' packet. */
decode_m_packet (buf, ofs, len);
}
/* Handle all of the extended 'Q' packets. */
-void
+
+static void
handle_general_set (char *own_buf)
{
if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0)
return;
}
+ if (strcmp (own_buf, "QStartNoAckMode") == 0)
+ {
+ if (remote_debug)
+ {
+ fprintf (stderr, "[noack mode enabled]\n");
+ fflush (stderr);
+ }
+
+ noack_mode = 1;
+ write_ok (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "QNonStop:", 9) == 0)
+ {
+ char *mode = own_buf + 9;
+ int req = -1;
+ char *req_str;
+
+ if (strcmp (mode, "0") == 0)
+ req = 0;
+ else if (strcmp (mode, "1") == 0)
+ req = 1;
+ else
+ {
+ /* We don't know what this mode is, so complain to
+ GDB. */
+ fprintf (stderr, "Unknown non-stop mode requested: %s\n",
+ own_buf);
+ write_enn (own_buf);
+ return;
+ }
+
+ req_str = req ? "non-stop" : "all-stop";
+ if (start_non_stop (req) != 0)
+ {
+ fprintf (stderr, "Setting %s mode failed\n", req_str);
+ write_enn (own_buf);
+ return;
+ }
+
+ non_stop = req;
+
+ if (remote_debug)
+ fprintf (stderr, "[%s mode enabled]\n", req_str);
+
+ write_ok (own_buf);
+ return;
+ }
+
+ if (target_supports_tracepoints ()
+ && handle_tracepoint_general_set (own_buf))
+ return;
+
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
static const char *
get_features_xml (const char *annex)
{
- 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
+ /* gdbserver_xmltarget defines what to return when looking
+ for the "target.xml" file. Its contents can either be
+ verbatim XML code (prefixed with a '@') or else the name
+ of the actual XML file to be used in place of "target.xml".
- if (strcmp (annex, "target.xml") != 0)
- return NULL;
+ This variable is set up from the auto-generated
+ init_registers_... routine for the current target. */
- if (features_supported == -1)
+ if (gdbserver_xmltarget
+ && strcmp (annex, "target.xml") == 0)
{
- const char *arch = NULL;
- if (the_target->arch_string != NULL)
- arch = (*the_target->arch_string) ();
-
- if (arch == NULL)
- features_supported = 0;
+ if (*gdbserver_xmltarget == '@')
+ return gdbserver_xmltarget + 1;
else
- {
- features_supported = 1;
- document = malloc (64 + strlen (arch));
- snprintf (document, 64 + strlen (arch),
- "<target><architecture>%s</architecture></target>",
- arch);
- }
+ annex = gdbserver_xmltarget;
}
- return 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
+
+ return NULL;
}
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 (" Enable general debugging messages\n");
+ monitor_output (" set debug-hw-points <0|1>\n");
+ monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
monitor_output (" set remote-debug <0|1>\n");
monitor_output (" Enable remote protocol debugging messages\n");
+ monitor_output (" exit\n");
+ monitor_output (" Quit GDBserver\n");
}
-/* Handle all of the extended 'q' packets. */
-void
-handle_query (char *own_buf, int *new_packet_len_p)
-{
- static struct inferior_list_entry *thread_ptr;
+/* Read trace frame or inferior memory. */
- if (strcmp ("qSymbol::", own_buf) == 0)
+static int
+read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
+{
+ if (current_traceframe >= 0)
{
- if (the_target->look_up_symbols != NULL)
- (*the_target->look_up_symbols) ();
-
- strcpy (own_buf, "OK");
- return;
+ ULONGEST nbytes;
+ ULONGEST length = len;
+
+ if (traceframe_read_mem (current_traceframe,
+ memaddr, myaddr, len, &nbytes))
+ return EIO;
+ /* Data read from trace buffer, we're done. */
+ if (nbytes == length)
+ return 0;
+ if (!in_readonly_region (memaddr, length))
+ return EIO;
+ /* Otherwise we have a valid readonly case, fall through. */
+ /* (assume no half-trace half-real blocks for now) */
}
- 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;
- }
+ return read_inferior_memory (memaddr, myaddr, len);
+}
- 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;
- }
- }
+/* Write trace frame or inferior memory. Actually, writing to trace
+ frames is forbidden. */
- if (the_target->read_offsets != NULL
- && strcmp ("qOffsets", own_buf) == 0)
+static int
+write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
+{
+ if (current_traceframe >= 0)
+ return EIO;
+ else
+ return write_inferior_memory (memaddr, myaddr, len);
+}
+
+/* Subroutine of handle_search_memory to simplify it. */
+
+static int
+handle_search_memory_1 (CORE_ADDR start_addr, CORE_ADDR search_space_len,
+ gdb_byte *pattern, unsigned pattern_len,
+ gdb_byte *search_buf,
+ unsigned chunk_size, unsigned search_buf_size,
+ CORE_ADDR *found_addrp)
+{
+ /* Prime the search buffer. */
+
+ if (read_memory (start_addr, search_buf, search_buf_size) != 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;
+ warning ("Unable to access target memory at 0x%lx, halting search.",
+ (long) start_addr);
+ return -1;
}
- if (the_target->read_auxv != NULL
- && strncmp ("qXfer:auxv:read:", own_buf, 16) == 0)
+ /* Perform the search.
+
+ The loop is kept simple by allocating [N + pattern-length - 1] bytes.
+ When we've scanned N bytes we copy the trailing bytes to the start and
+ read in another N bytes. */
+
+ while (search_space_len >= pattern_len)
{
- unsigned char *data;
- int n;
- CORE_ADDR ofs;
- unsigned int len;
- char *annex;
+ gdb_byte *found_ptr;
+ unsigned nr_search_bytes = (search_space_len < search_buf_size
+ ? search_space_len
+ : search_buf_size);
- /* Reject any annex; grab the offset and length. */
- if (decode_xfer_read (own_buf + 16, &annex, &ofs, &len) < 0
- || annex[0] != '\0')
+ found_ptr = memmem (search_buf, nr_search_bytes, pattern, pattern_len);
+
+ if (found_ptr != NULL)
{
- strcpy (own_buf, "E00");
- return;
+ CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
+ *found_addrp = found_addr;
+ return 1;
}
- /* Read one extra byte, as an indicator of whether there is
- more. */
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
- data = malloc (len + 1);
- 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);
+ /* Not found in this chunk, skip to next chunk. */
+
+ /* Don't let search_space_len wrap here, it's unsigned. */
+ if (search_space_len >= chunk_size)
+ search_space_len -= chunk_size;
else
- *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
+ search_space_len = 0;
- free (data);
+ if (search_space_len >= pattern_len)
+ {
+ unsigned keep_len = search_buf_size - chunk_size;
+ CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
+ int nr_to_read;
- return;
- }
+ /* Copy the trailing part of the previous iteration to the front
+ of the buffer for the next iteration. */
+ memcpy (search_buf, search_buf + chunk_size, keep_len);
- if (strncmp ("qXfer:features:read:", own_buf, 20) == 0)
- {
- CORE_ADDR ofs;
- unsigned int len, total_len;
- const char *document;
- char *annex;
+ nr_to_read = (search_space_len - keep_len < chunk_size
+ ? search_space_len - keep_len
+ : chunk_size);
- /* Check for support. */
- document = get_features_xml ("target.xml");
- if (document == NULL)
- {
- own_buf[0] = '\0';
- return;
- }
+ if (read_memory (read_addr, search_buf + keep_len,
+ nr_to_read) != 0)
+ {
+ warning ("Unable to access target memory at 0x%lx, halting search.",
+ (long) read_addr);
+ return -1;
+ }
- /* Grab the annex, offset, and length. */
- if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0)
- {
- strcpy (own_buf, "E00");
- return;
+ start_addr += chunk_size;
}
+ }
- /* Now grab the correct annex. */
- document = get_features_xml (annex);
- if (document == NULL)
- {
- strcpy (own_buf, "E00");
- return;
- }
+ /* Not found. */
- total_len = strlen (document);
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
+ return 0;
+}
- 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);
+/* Handle qSearch:memory packets. */
+static void
+handle_search_memory (char *own_buf, int packet_len)
+{
+ CORE_ADDR start_addr;
+ CORE_ADDR search_space_len;
+ gdb_byte *pattern;
+ unsigned int pattern_len;
+ /* NOTE: also defined in find.c testcase. */
+#define SEARCH_CHUNK_SIZE 16000
+ const unsigned chunk_size = SEARCH_CHUNK_SIZE;
+ /* Buffer to hold memory contents for searching. */
+ gdb_byte *search_buf;
+ unsigned search_buf_size;
+ int found;
+ CORE_ADDR found_addr;
+ int cmd_name_len = sizeof ("qSearch:memory:") - 1;
+
+ pattern = malloc (packet_len);
+ if (pattern == NULL)
+ {
+ error ("Unable to allocate memory to perform the search");
+ strcpy (own_buf, "E00");
return;
}
-
- /* Protocol features query. */
- if (strncmp ("qSupported", own_buf, 10) == 0
- && (own_buf[10] == ':' || own_buf[10] == '\0'))
+ if (decode_search_memory_packet (own_buf + cmd_name_len,
+ packet_len - cmd_name_len,
+ &start_addr, &search_space_len,
+ pattern, &pattern_len) < 0)
{
- sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1);
+ free (pattern);
+ error ("Error in parsing qSearch:memory packet");
+ strcpy (own_buf, "E00");
+ return;
+ }
- if (the_target->read_auxv != NULL)
- strcat (own_buf, ";qXfer:auxv:read+");
+ search_buf_size = chunk_size + pattern_len - 1;
- if (get_features_xml ("target.xml") != NULL)
- strcat (own_buf, ";qXfer:features:read+");
+ /* No point in trying to allocate a buffer larger than the search space. */
+ if (search_space_len < search_buf_size)
+ search_buf_size = search_space_len;
+ search_buf = malloc (search_buf_size);
+ if (search_buf == NULL)
+ {
+ free (pattern);
+ error ("Unable to allocate memory to perform the search");
+ strcpy (own_buf, "E00");
return;
}
- /* 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;
+ found = handle_search_memory_1 (start_addr, search_space_len,
+ pattern, pattern_len,
+ search_buf, chunk_size, search_buf_size,
+ &found_addr);
- if (p == NULL)
- break;
+ if (found > 0)
+ sprintf (own_buf, "1,%lx", (long) found_addr);
+ else if (found == 0)
+ strcpy (own_buf, "0");
+ else
+ strcpy (own_buf, "E00");
- p2 = strchr (p, ',');
- if (p2)
- {
- len = p2 - p;
- p2++;
- }
- else
- {
- len = strlen (p);
- p2 = NULL;
- }
+ free (search_buf);
+ free (pattern);
+}
- decode_address (&parts[i], p, len);
- p = p2;
- }
+#define require_running(BUF) \
+ if (!target_running ()) \
+ { \
+ write_enn (BUF); \
+ return; \
+ }
- if (p != NULL || i < 3)
- err = 1;
- else
- {
- struct thread_info *thread = gdb_id_to_thread (parts[0]);
+/* Handle monitor commands not handled by target-specific handlers. */
- if (thread == NULL)
- err = 2;
- else
- err = the_target->get_tls_address (thread, parts[1], parts[2],
- &address);
- }
+static void
+handle_monitor_command (char *mon)
+{
+ if (strcmp (mon, "set debug 1") == 0)
+ {
+ debug_threads = 1;
+ monitor_output ("Debug output enabled.\n");
+ }
+ else if (strcmp (mon, "set debug 0") == 0)
+ {
+ debug_threads = 0;
+ monitor_output ("Debug output disabled.\n");
+ }
+ else if (strcmp (mon, "set debug-hw-points 1") == 0)
+ {
+ debug_hw_points = 1;
+ monitor_output ("H/W point debugging output enabled.\n");
+ }
+ else if (strcmp (mon, "set debug-hw-points 0") == 0)
+ {
+ debug_hw_points = 0;
+ monitor_output ("H/W point debugging output disabled.\n");
+ }
+ else if (strcmp (mon, "set remote-debug 1") == 0)
+ {
+ remote_debug = 1;
+ monitor_output ("Protocol debug output enabled.\n");
+ }
+ else if (strcmp (mon, "set remote-debug 0") == 0)
+ {
+ remote_debug = 0;
+ monitor_output ("Protocol debug output disabled.\n");
+ }
+ else if (strcmp (mon, "help") == 0)
+ monitor_show_help ();
+ else if (strcmp (mon, "exit") == 0)
+ exit_requested = 1;
+ else
+ {
+ monitor_output ("Unknown monitor command.\n\n");
+ monitor_show_help ();
+ write_enn (own_buf);
+ }
+}
- if (err == 0)
- {
- sprintf (own_buf, "%llx", address);
- return;
- }
- else if (err > 0)
- {
- write_enn (own_buf);
- return;
- }
+static void
+handle_threads_qxfer_proper (struct buffer *buffer)
+{
+ struct inferior_list_entry *thread;
- /* Otherwise, pretend we do not understand this packet. */
- }
+ buffer_grow_str (buffer, "<threads>\n");
- /* Handle "monitor" commands. */
- if (strncmp ("qRcmd,", own_buf, 6) == 0)
+ for (thread = all_threads.head; thread; thread = thread->next)
{
- char *mon = malloc (PBUFSIZ);
- int len = strlen (own_buf + 6);
+ ptid_t ptid = thread_to_gdb_id ((struct thread_info *)thread);
+ char ptid_s[100];
+ int core = -1;
+ char core_s[21];
- 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_ptid (ptid_s, ptid);
- write_ok (own_buf);
+ if (the_target->core_of_thread)
+ core = (*the_target->core_of_thread) (ptid);
- 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)
+ if (core != -1)
{
- remote_debug = 1;
- monitor_output ("Protocol debug output enabled.\n");
+ sprintf (core_s, "%d", core);
+ buffer_xml_printf (buffer, "<thread id=\"%s\" core=\"%s\"/>\n",
+ ptid_s, core_s);
}
- 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);
+ buffer_xml_printf (buffer, "<thread id=\"%s\"/>\n",
+ ptid_s);
}
-
- free (mon);
- return;
}
- /* Otherwise we didn't know what packet it was. Say we didn't
- understand it. */
- own_buf[0] = 0;
+ buffer_grow_str0 (buffer, "</threads>\n");
}
-/* Parse vCont packets. */
-void
-handle_v_cont (char *own_buf, char *status, int *signal)
+static int
+handle_threads_qxfer (const char *annex,
+ unsigned char *readbuf,
+ CORE_ADDR offset, int length)
{
- 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]));
+ static char *result = 0;
+ static unsigned int result_length = 0;
- default_action.thread = -1;
- default_action.leave_stopped = 1;
- default_action.step = 0;
- default_action.sig = 0;
+ if (annex && strcmp (annex, "") != 0)
+ return 0;
- p = &own_buf[5];
- i = 0;
- while (*p)
+ if (offset == 0)
{
- 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;
+ struct buffer buffer;
+ /* When asked for data at offset 0, generate everything and store into
+ 'result'. Successive reads will be served off 'result'. */
+ if (result)
+ free (result);
- 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;
- }
+ buffer_init (&buffer);
- if (p[0] == 0)
- {
- resume_info[i].thread = -1;
- default_action = resume_info[i];
+ handle_threads_qxfer_proper (&buffer);
- /* 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;
+ result = buffer_finish (&buffer);
+ result_length = strlen (result);
+ buffer_free (&buffer);
+ }
- if (p == q)
- goto err;
- p = q;
- if (p[0] != ';' && p[0] != 0)
- goto err;
+ if (offset >= result_length)
+ {
+ /* We're out of data. */
+ free (result);
+ result = NULL;
+ result_length = 0;
+ return 0;
+ }
- thread_id = gdb_id_to_thread_id (gdb_id);
- if (thread_id)
- resume_info[i].thread = thread_id;
- else
- goto err;
+ if (length > result_length - offset)
+ length = result_length - offset;
- i++;
- }
- }
+ memcpy (readbuf, result + offset, length);
- resume_info[i] = default_action;
+ return length;
- /* 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);
+/* Table used by the crc32 function to calcuate the checksum. */
- free (resume_info);
+static unsigned int crc32_table[256] =
+{0, 0};
- *signal = mywait (status, 1);
- prepare_resume_reply (own_buf, *status, *signal);
- return;
+/* Compute 32 bit CRC from inferior memory.
-err:
- /* No other way to report an error... */
- strcpy (own_buf, "");
- free (resume_info);
- return;
-}
+ On success, return 32 bit CRC.
+ On failure, return (unsigned long long) -1. */
-/* Handle all of the extended 'v' packets. */
-void
-handle_v_requests (char *own_buf, char *status, int *signal)
+static unsigned long long
+crc32 (CORE_ADDR base, int len, unsigned int crc)
{
- if (strncmp (own_buf, "vCont;", 6) == 0)
+ if (!crc32_table[1])
{
- handle_v_cont (own_buf, status, signal);
- return;
- }
+ /* Initialize the CRC table and the decoding table. */
+ int i, j;
+ unsigned int c;
- if (strncmp (own_buf, "vCont?", 6) == 0)
- {
- strcpy (own_buf, "vCont;c;C;s;S");
- return;
+ for (i = 0; i < 256; i++)
+ {
+ for (c = i << 24, j = 8; j > 0; --j)
+ c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+ crc32_table[i] = c;
+ }
}
- /* Otherwise we didn't know what packet it was. Say we didn't
- understand it. */
- own_buf[0] = 0;
- return;
-}
+ while (len--)
+ {
+ unsigned char byte = 0;
-void
-myresume (int step, int sig)
-{
- struct thread_resume resume_info[2];
- int n = 0;
+ /* Return failure if memory read fails. */
+ if (read_inferior_memory (base, &byte, 1) != 0)
+ return (unsigned long long) -1;
- 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++;
+ crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ byte) & 255];
+ base++;
}
- 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);
+ return (unsigned long long) crc;
}
-static int attached;
-
-static void
-gdbserver_version (void)
+/* Handle all of the extended 'q' packets. */
+void
+handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
{
- 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 struct inferior_list_entry *thread_ptr;
-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");
-}
+ /* Reply the current thread id. */
+ if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
+ {
+ ptid_t gdb_id;
+ require_running (own_buf);
-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 (!ptid_equal (general_thread, null_ptid)
+ && !ptid_equal (general_thread, minus_one_ptid))
+ gdb_id = general_thread;
+ else
+ {
+ thread_ptr = all_threads.head;
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
+ }
- if (argc >= 2 && strcmp (argv[1], "--version") == 0)
- {
- gdbserver_version ();
- exit (0);
+ sprintf (own_buf, "QC");
+ own_buf += 2;
+ own_buf = write_ptid (own_buf, gdb_id);
+ return;
}
- if (argc >= 2 && strcmp (argv[1], "--help") == 0)
+ if (strcmp ("qSymbol::", own_buf) == 0)
{
- gdbserver_usage ();
- exit (0);
- }
+ /* GDB is suggesting new symbols have been loaded. This may
+ mean a new shared library has been detected as loaded, so
+ take the opportunity to check if breakpoints we think are
+ inserted, still are. Note that it isn't guaranteed that
+ we'll see this when a shared library is loaded, and nor will
+ we see this for unloads (although breakpoints in unloaded
+ libraries shouldn't trigger), as GDB may not find symbols for
+ the library at all. We also re-validate breakpoints when we
+ see a second GDB breakpoint for the same address, and or when
+ we access breakpoint shadows. */
+ validate_breakpoints ();
+
+ if (target_supports_tracepoints ())
+ tracepoint_look_up_symbols ();
+
+ if (target_running () && the_target->look_up_symbols != NULL)
+ (*the_target->look_up_symbols) ();
- if (setjmp (toplevel))
- {
- fprintf (stderr, "Exiting\n");
- exit (1);
+ strcpy (own_buf, "OK");
+ return;
}
- bad_attach = 0;
- pid = 0;
- attached = 0;
- if (argc >= 3 && strcmp (argv[2], "--attach") == 0)
+ if (!disable_packet_qfThreadInfo)
{
- if (argc == 4
- && argv[3][0] != '\0'
- && (pid = strtoul (argv[3], &arg_end, 10)) != 0
- && *arg_end == '\0')
+ if (strcmp ("qfThreadInfo", own_buf) == 0)
{
- ;
- }
- else
- bad_attach = 1;
- }
-
- if (argc < 3 || bad_attach)
- {
- gdbserver_usage ();
- exit (1);
- }
+ ptid_t gdb_id;
- initialize_low ();
-
- own_buf = malloc (PBUFSIZ);
- mem_buf = malloc (PBUFSIZ);
+ require_running (own_buf);
+ thread_ptr = all_threads.head;
- if (pid == 0)
- {
- /* Wait till we are at first instruction in program. */
- signal = start_inferior (&argv[2], &status);
+ *own_buf++ = 'm';
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
+ write_ptid (own_buf, gdb_id);
+ thread_ptr = thread_ptr->next;
+ return;
+ }
- /* We are now stopped at the first instruction of the target process */
- }
- else
- {
- switch (attach_inferior (pid, &status, &signal))
+ if (strcmp ("qsThreadInfo", own_buf) == 0)
{
- case -1:
- error ("Attaching not supported on this target");
- break;
- default:
- attached = 1;
- break;
+ ptid_t gdb_id;
+
+ require_running (own_buf);
+ if (thread_ptr != NULL)
+ {
+ *own_buf++ = 'm';
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
+ write_ptid (own_buf, gdb_id);
+ thread_ptr = thread_ptr->next;
+ return;
+ }
+ else
+ {
+ sprintf (own_buf, "l");
+ return;
+ }
}
}
- if (setjmp (toplevel))
+ if (the_target->read_offsets != NULL
+ && strcmp ("qOffsets", own_buf) == 0)
{
- fprintf (stderr, "Killing inferior\n");
- kill_inferior ();
- exit (1);
- }
+ CORE_ADDR text, data;
+
+ require_running (own_buf);
+ if (the_target->read_offsets (&text, &data))
+ sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX",
+ (long)text, (long)data, (long)data);
+ else
+ write_enn (own_buf);
+
+ return;
+ }
+
+ 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;
+
+ require_running (own_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;
+
+ require_running (own_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;
+
+ require_running (own_buf);
+
+ /* 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);
+ if (data == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ 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;
+
+ require_running (own_buf);
+
+ /* 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;
+
+ require_running (own_buf);
+
+ /* 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);
+ if (document == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ 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;
+ }
+
+ if (the_target->qxfer_osdata != NULL
+ && strncmp ("qXfer:osdata:read:", own_buf, 18) == 0)
+ {
+ char *annex;
+ int n;
+ unsigned int len;
+ CORE_ADDR ofs;
+ unsigned char *workbuf;
+
+ strcpy (own_buf, "E00");
+ if (decode_xfer_read (own_buf + 18, &annex, &ofs, &len) < 0)
+ return;
+ if (len > PBUFSIZ - 2)
+ len = PBUFSIZ - 2;
+ workbuf = malloc (len + 1);
+ if (!workbuf)
+ return;
+
+ n = (*the_target->qxfer_osdata) (annex, workbuf, NULL, ofs, len + 1);
+ if (n < 0)
+ write_enn (own_buf);
+ else if (n > len)
+ *new_packet_len_p = write_qxfer_response (own_buf, workbuf, len, 1);
+ else
+ *new_packet_len_p = write_qxfer_response (own_buf, workbuf, n, 0);
+
+ free (workbuf);
+ return;
+ }
+
+ if (the_target->qxfer_siginfo != NULL
+ && strncmp ("qXfer:siginfo:read:", own_buf, 19) == 0)
+ {
+ unsigned char *data;
+ int n;
+ CORE_ADDR ofs;
+ unsigned int len;
+ char *annex;
+
+ require_running (own_buf);
+
+ /* Reject any annex; grab the offset and length. */
+ if (decode_xfer_read (own_buf + 19, &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);
+ if (!data)
+ return;
+ n = (*the_target->qxfer_siginfo) (annex, data, NULL, ofs, 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 (the_target->qxfer_siginfo != NULL
+ && strncmp ("qXfer:siginfo:write:", own_buf, 20) == 0)
+ {
+ char *annex;
+ int n;
+ unsigned int len;
+ CORE_ADDR ofs;
+ unsigned char *data;
+
+ require_running (own_buf);
+
+ strcpy (own_buf, "E00");
+ data = malloc (packet_len - 19);
+ if (!data)
+ return;
+ if (decode_xfer_write (own_buf + 20, packet_len - 20, &annex,
+ &ofs, &len, data) < 0)
+ {
+ free (data);
+ return;
+ }
+
+ n = (*the_target->qxfer_siginfo)
+ (annex, NULL, (unsigned const char *)data, ofs, len);
+ if (n < 0)
+ write_enn (own_buf);
+ else
+ sprintf (own_buf, "%x", n);
+
+ free (data);
+ return;
+ }
+
+ if (strncmp ("qXfer:threads:read:", own_buf, 19) == 0)
+ {
+ unsigned char *data;
+ int n;
+ CORE_ADDR ofs;
+ unsigned int len;
+ char *annex;
+
+ require_running (own_buf);
+
+ /* Reject any annex; grab the offset and length. */
+ if (decode_xfer_read (own_buf + 19, &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);
+ if (!data)
+ return;
+ n = handle_threads_qxfer (annex, data, ofs, 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:statictrace:read:", own_buf,
+ sizeof ("qXfer:statictrace:read:") -1) == 0)
+ {
+ unsigned char *data;
+ CORE_ADDR ofs;
+ unsigned int len;
+ char *annex;
+ ULONGEST nbytes;
+
+ require_running (own_buf);
+
+ if (current_traceframe == -1)
+ {
+ write_enn (own_buf);
+ return;
+ }
+
+ /* Reject any annex; grab the offset and length. */
+ if (decode_xfer_read (own_buf + sizeof ("qXfer:statictrace:read:") -1,
+ &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);
+ if (!data)
+ return;
+
+ if (traceframe_read_sdata (current_traceframe, ofs,
+ data, len + 1, &nbytes))
+ write_enn (own_buf);
+ else if (nbytes > len)
+ *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
+ else
+ *new_packet_len_p = write_qxfer_response (own_buf, data, nbytes, 0);
+
+ free (data);
+ return;
+ }
+
+ /* Protocol features query. */
+ if (strncmp ("qSupported", own_buf, 10) == 0
+ && (own_buf[10] == ':' || own_buf[10] == '\0'))
+ {
+ char *p = &own_buf[10];
+ int gdb_supports_qRelocInsn = 0;
+
+ /* Start processing qSupported packet. */
+ target_process_qsupported (NULL);
+
+ /* Process each feature being provided by GDB. The first
+ feature will follow a ':', and latter features will follow
+ ';'. */
+ if (*p == ':')
+ {
+ char **qsupported = NULL;
+ int count = 0;
+ int i;
+
+ /* Two passes, to avoid nested strtok calls in
+ target_process_qsupported. */
+ for (p = strtok (p + 1, ";");
+ p != NULL;
+ p = strtok (NULL, ";"))
+ {
+ count++;
+ qsupported = xrealloc (qsupported, count * sizeof (char *));
+ qsupported[count - 1] = xstrdup (p);
+ }
+
+ for (i = 0; i < count; i++)
+ {
+ p = qsupported[i];
+ if (strcmp (p, "multiprocess+") == 0)
+ {
+ /* GDB supports and wants multi-process support if
+ possible. */
+ if (target_supports_multi_process ())
+ multi_process = 1;
+ }
+ else if (strcmp (p, "qRelocInsn+") == 0)
+ {
+ /* GDB supports relocate instruction requests. */
+ gdb_supports_qRelocInsn = 1;
+ }
+ else
+ target_process_qsupported (p);
+
+ free (p);
+ }
+
+ free (qsupported);
+ }
+
+ sprintf (own_buf, "PacketSize=%x;QPassSignals+", 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 (the_target->qxfer_siginfo != NULL)
+ strcat (own_buf, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
+
+ /* We always report qXfer:features:read, as targets may
+ install XML files on a subsequent call to arch_setup.
+ If we reported to GDB on startup that we don't support
+ qXfer:feature:read at all, we will never be re-queried. */
+ strcat (own_buf, ";qXfer:features:read+");
+
+ if (transport_is_reliable)
+ strcat (own_buf, ";QStartNoAckMode+");
+
+ if (the_target->qxfer_osdata != NULL)
+ strcat (own_buf, ";qXfer:osdata:read+");
+
+ if (target_supports_multi_process ())
+ strcat (own_buf, ";multiprocess+");
+
+ if (target_supports_non_stop ())
+ strcat (own_buf, ";QNonStop+");
+
+ strcat (own_buf, ";qXfer:threads:read+");
+
+ if (target_supports_tracepoints ())
+ {
+ strcat (own_buf, ";ConditionalTracepoints+");
+ strcat (own_buf, ";TraceStateVariables+");
+ strcat (own_buf, ";TracepointSource+");
+ strcat (own_buf, ";DisconnectedTracing+");
+ if (gdb_supports_qRelocInsn && target_supports_fast_tracepoints ())
+ strcat (own_buf, ";FastTracepoints+");
+ strcat (own_buf, ";StaticTracepoints+");
+ strcat (own_buf, ";qXfer:statictrace:read+");
+ }
+
+ return;
+ }
+
+ /* Thread-local storage support. */
+ if (the_target->get_tls_address != NULL
+ && strncmp ("qGetTLSAddr:", own_buf, 12) == 0)
+ {
+ char *p = own_buf + 12;
+ CORE_ADDR parts[2], address = 0;
+ int i, err;
+ ptid_t ptid = null_ptid;
+
+ require_running (own_buf);
+
+ for (i = 0; i < 3; i++)
+ {
+ char *p2;
+ int len;
+
+ if (p == NULL)
+ break;
+
+ p2 = strchr (p, ',');
+ if (p2)
+ {
+ len = p2 - p;
+ p2++;
+ }
+ else
+ {
+ len = strlen (p);
+ p2 = NULL;
+ }
+
+ if (i == 0)
+ ptid = read_ptid (p, NULL);
+ else
+ decode_address (&parts[i - 1], p, len);
+ p = p2;
+ }
+
+ if (p != NULL || i < 3)
+ err = 1;
+ else
+ {
+ struct thread_info *thread = find_thread_ptid (ptid);
+
+ if (thread == NULL)
+ err = 2;
+ else
+ err = the_target->get_tls_address (thread, parts[0], parts[1],
+ &address);
+ }
+
+ if (err == 0)
+ {
+ sprintf (own_buf, "%llx", address);
+ return;
+ }
+ else if (err > 0)
+ {
+ write_enn (own_buf);
+ return;
+ }
+
+ /* Otherwise, pretend we do not understand this packet. */
+ }
+
+ /* Windows OS Thread Information Block address support. */
+ if (the_target->get_tib_address != NULL
+ && strncmp ("qGetTIBAddr:", own_buf, 12) == 0)
+ {
+ char *annex;
+ int n;
+ CORE_ADDR tlb;
+ ptid_t ptid = read_ptid (own_buf + 12, &annex);
+
+ n = (*the_target->get_tib_address) (ptid, &tlb);
+ if (n == 1)
+ {
+ sprintf (own_buf, "%llx", tlb);
+ return;
+ }
+ else if (n == 0)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ return;
+ }
+
+ /* Handle "monitor" commands. */
+ if (strncmp ("qRcmd,", own_buf, 6) == 0)
+ {
+ char *mon = malloc (PBUFSIZ);
+ int len = strlen (own_buf + 6);
+
+ if (mon == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
+
+ if ((len % 2) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2)
+ {
+ write_enn (own_buf);
+ free (mon);
+ return;
+ }
+ mon[len / 2] = '\0';
+
+ write_ok (own_buf);
+
+ if (the_target->handle_monitor_command == NULL
+ || (*the_target->handle_monitor_command) (mon) == 0)
+ /* Default processing. */
+ handle_monitor_command (mon);
+
+ free (mon);
+ return;
+ }
+
+ if (strncmp ("qSearch:memory:", own_buf, sizeof ("qSearch:memory:") - 1) == 0)
+ {
+ require_running (own_buf);
+ handle_search_memory (own_buf, packet_len);
+ return;
+ }
+
+ if (strcmp (own_buf, "qAttached") == 0
+ || strncmp (own_buf, "qAttached:", sizeof ("qAttached:") - 1) == 0)
+ {
+ struct process_info *process;
+
+ if (own_buf[sizeof ("qAttached") - 1])
+ {
+ int pid = strtoul (own_buf + sizeof ("qAttached:") - 1, NULL, 16);
+ process = (struct process_info *)
+ find_inferior_id (&all_processes, pid_to_ptid (pid));
+ }
+ else
+ {
+ require_running (own_buf);
+ process = current_process ();
+ }
+
+ if (process == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
+
+ strcpy (own_buf, process->attached ? "1" : "0");
+ return;
+ }
+
+ if (strncmp ("qCRC:", own_buf, 5) == 0)
+ {
+ /* CRC check (compare-section). */
+ char *comma;
+ CORE_ADDR base;
+ int len;
+ unsigned long long crc;
+
+ require_running (own_buf);
+ base = strtoul (own_buf + 5, &comma, 16);
+ if (*comma++ != ',')
+ {
+ write_enn (own_buf);
+ return;
+ }
+ len = strtoul (comma, NULL, 16);
+ crc = crc32 (base, len, 0xffffffff);
+ /* Check for memory failure. */
+ if (crc == (unsigned long long) -1)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ sprintf (own_buf, "C%lx", (unsigned long) crc);
+ return;
+ }
+
+ if (target_supports_tracepoints () && handle_tracepoint_query (own_buf))
+ return;
+
+ /* Otherwise we didn't know what packet it was. Say we didn't
+ understand it. */
+ own_buf[0] = 0;
+}
+
+/* Parse vCont packets. */
+void
+handle_v_cont (char *own_buf)
+{
+ char *p, *q;
+ int n = 0, i = 0;
+ struct thread_resume *resume_info;
+ struct thread_resume default_action = {{0}};
+
+ /* Count the number of semicolons in the packet. There should be one
+ for every action. */
+ p = &own_buf[5];
+ while (p)
+ {
+ n++;
+ p++;
+ p = strchr (p, ';');
+ }
+
+ resume_info = malloc (n * sizeof (resume_info[0]));
+ if (resume_info == NULL)
+ goto err;
+
+ p = &own_buf[5];
+ while (*p)
+ {
+ p++;
+
+ if (p[0] == 's' || p[0] == 'S')
+ resume_info[i].kind = resume_step;
+ else if (p[0] == 'c' || p[0] == 'C')
+ resume_info[i].kind = resume_continue;
+ else if (p[0] == 't')
+ resume_info[i].kind = resume_stop;
+ else
+ goto err;
+
+ if (p[0] == 'S' || p[0] == 'C')
+ {
+ int sig;
+ sig = strtol (p + 1, &q, 16);
+ if (p == q)
+ goto err;
+ p = q;
+
+ if (!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 = minus_one_ptid;
+ default_action = resume_info[i];
+
+ /* Note: we don't increment i here, we'll overwrite this entry
+ the next time through. */
+ }
+ else if (p[0] == ':')
+ {
+ ptid_t ptid = read_ptid (p + 1, &q);
+
+ if (p == q)
+ goto err;
+ p = q;
+ if (p[0] != ';' && p[0] != 0)
+ goto err;
+
+ resume_info[i].thread = ptid;
+
+ i++;
+ }
+ }
+
+ if (i < n)
+ resume_info[i] = default_action;
+
+ /* Still used in occasional places in the backend. */
+ if (n == 1
+ && !ptid_equal (resume_info[0].thread, minus_one_ptid)
+ && resume_info[0].kind != resume_stop)
+ cont_thread = resume_info[0].thread;
+ else
+ cont_thread = minus_one_ptid;
+ set_desired_inferior (0);
+
+ if (!non_stop)
+ enable_async_io ();
+
+ (*the_target->resume) (resume_info, n);
+
+ free (resume_info);
+
+ if (non_stop)
+ write_ok (own_buf);
+ else
+ {
+ last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ disable_async_io ();
+ }
+ return;
+
+err:
+ write_enn (own_buf);
+ free (resume_info);
+ return;
+}
+
+/* Attach to a new program. Return 1 if successful, 0 if failure. */
+int
+handle_v_attach (char *own_buf)
+{
+ int pid;
+
+ pid = strtol (own_buf + 8, NULL, 16);
+ if (pid != 0 && attach_inferior (pid) == 0)
+ {
+ /* Don't report shared library events after attaching, even if
+ some libraries are preloaded. GDB will always poll the
+ library list. Avoids the "stopped by shared library event"
+ notice on the GDB side. */
+ dlls_changed = 0;
+
+ if (non_stop)
+ {
+ /* In non-stop, we don't send a resume reply. Stop events
+ will follow up using the normal notification
+ mechanism. */
+ write_ok (own_buf);
+ }
+ else
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+
+ return 1;
+ }
+ else
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+}
+
+/* Run a new program. Return 1 if successful, 0 if failure. */
+static int
+handle_v_run (char *own_buf)
+{
+ char *p, *next_p, **new_argv;
+ int i, new_argc;
+
+ new_argc = 0;
+ for (p = own_buf + strlen ("vRun;"); p && *p; p = strchr (p, ';'))
+ {
+ p++;
+ new_argc++;
+ }
+
+ new_argv = calloc (new_argc + 2, sizeof (char *));
+ if (new_argv == NULL)
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+
+ i = 0;
+ for (p = own_buf + strlen ("vRun;"); *p; p = next_p)
+ {
+ next_p = strchr (p, ';');
+ if (next_p == NULL)
+ next_p = p + strlen (p);
+
+ if (i == 0 && p == next_p)
+ new_argv[i] = NULL;
+ else
+ {
+ /* FIXME: Fail request if out of memory instead of dying. */
+ new_argv[i] = xmalloc (1 + (next_p - p) / 2);
+ unhexify (new_argv[i], p, (next_p - p) / 2);
+ new_argv[i][(next_p - p) / 2] = '\0';
+ }
+
+ if (*next_p)
+ next_p++;
+ i++;
+ }
+ new_argv[i] = NULL;
+
+ if (new_argv[0] == NULL)
+ {
+ /* GDB didn't specify a program to run. Use the program from the
+ last run with the new argument list. */
+
+ if (program_argv == NULL)
+ {
+ /* FIXME: new_argv memory leak */
+ write_enn (own_buf);
+ return 0;
+ }
+
+ new_argv[0] = strdup (program_argv[0]);
+ if (new_argv[0] == NULL)
+ {
+ /* FIXME: new_argv memory leak */
+ write_enn (own_buf);
+ return 0;
+ }
+ }
+
+ /* Free the old argv and install the new one. */
+ freeargv (program_argv);
+ program_argv = new_argv;
+
+ start_inferior (program_argv);
+ if (last_status.kind == TARGET_WAITKIND_STOPPED)
+ {
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+
+ /* In non-stop, sending a resume reply doesn't set the general
+ thread, but GDB assumes a vRun sets it (this is so GDB can
+ query which is the main thread of the new inferior. */
+ if (non_stop)
+ general_thread = last_ptid;
+
+ return 1;
+ }
+ else
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+}
+
+/* Kill process. Return 1 if successful, 0 if failure. */
+int
+handle_v_kill (char *own_buf)
+{
+ int pid;
+ char *p = &own_buf[6];
+ if (multi_process)
+ pid = strtol (p, NULL, 16);
+ else
+ pid = signal_pid;
+ if (pid != 0 && kill_inferior (pid) == 0)
+ {
+ last_status.kind = TARGET_WAITKIND_SIGNALLED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ last_ptid = pid_to_ptid (pid);
+ discard_queued_stop_replies (pid);
+ write_ok (own_buf);
+ return 1;
+ }
+ else
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+}
+
+/* Handle a 'vStopped' packet. */
+static void
+handle_v_stopped (char *own_buf)
+{
+ /* If we're waiting for GDB to acknowledge a pending stop reply,
+ consider that done. */
+ if (notif_queue)
+ {
+ struct vstop_notif *head;
+
+ if (remote_debug)
+ fprintf (stderr, "vStopped: acking %s\n",
+ target_pid_to_str (notif_queue->ptid));
+
+ head = notif_queue;
+ notif_queue = notif_queue->next;
+ free (head);
+ }
+
+ /* Push another stop reply, or if there are no more left, an OK. */
+ send_next_stop_reply (own_buf);
+}
+
+/* Handle all of the extended 'v' packets. */
+void
+handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
+{
+ if (!disable_packet_vCont)
+ {
+ if (strncmp (own_buf, "vCont;", 6) == 0)
+ {
+ require_running (own_buf);
+ handle_v_cont (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "vCont?", 6) == 0)
+ {
+ strcpy (own_buf, "vCont;c;C;s;S;t");
+ return;
+ }
+ }
+
+ if (strncmp (own_buf, "vFile:", 6) == 0
+ && handle_vFile (own_buf, packet_len, new_packet_len))
+ return;
+
+ if (strncmp (own_buf, "vAttach;", 8) == 0)
+ {
+ if (!multi_process && target_running ())
+ {
+ fprintf (stderr, "Already debugging a process\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_attach (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "vRun;", 5) == 0)
+ {
+ if (!multi_process && target_running ())
+ {
+ fprintf (stderr, "Already debugging a process\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_run (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "vKill;", 6) == 0)
+ {
+ if (!target_running ())
+ {
+ fprintf (stderr, "No process to kill\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_kill (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "vStopped", 8) == 0)
+ {
+ handle_v_stopped (own_buf);
+ return;
+ }
+
+ /* Otherwise we didn't know what packet it was. Say we didn't
+ understand it. */
+ own_buf[0] = 0;
+ return;
+}
+
+/* Resume inferior and wait for another event. In non-stop mode,
+ don't really wait here, but return immediatelly to the event
+ loop. */
+void
+myresume (char *own_buf, int step, int sig)
+{
+ struct thread_resume resume_info[2];
+ int n = 0;
+ int valid_cont_thread;
+
+ set_desired_inferior (0);
+
+ valid_cont_thread = (!ptid_equal (cont_thread, null_ptid)
+ && !ptid_equal (cont_thread, minus_one_ptid));
+
+ if (step || sig || valid_cont_thread)
+ {
+ resume_info[0].thread
+ = ((struct inferior_list_entry *) current_inferior)->id;
+ if (step)
+ resume_info[0].kind = resume_step;
+ else
+ resume_info[0].kind = resume_continue;
+ resume_info[0].sig = sig;
+ n++;
+ }
+
+ if (!valid_cont_thread)
+ {
+ resume_info[n].thread = minus_one_ptid;
+ resume_info[n].kind = resume_continue;
+ resume_info[n].sig = 0;
+ n++;
+ }
+
+ if (!non_stop)
+ enable_async_io ();
+
+ (*the_target->resume) (resume_info, n);
+
+ if (non_stop)
+ write_ok (own_buf);
+ else
+ {
+ last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ disable_async_io ();
+ }
+}
+
+/* Callback for for_each_inferior. Make a new stop reply for each
+ stopped thread. */
+
+static int
+queue_stop_reply_callback (struct inferior_list_entry *entry, void *arg)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ /* For now, assume targets that don't have this callback also don't
+ manage the thread's last_status field. */
+ if (the_target->thread_stopped == NULL)
+ {
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_STOPPED;
+ status.value.sig = TARGET_SIGNAL_TRAP;
+
+ /* Pass the last stop reply back to GDB, but don't notify
+ yet. */
+ queue_stop_reply (entry->id, &thread->last_status);
+ }
+ else
+ {
+ if (thread_stopped (thread))
+ {
+ if (debug_threads)
+ fprintf (stderr, "Reporting thread %s as already stopped with %s\n",
+ target_pid_to_str (entry->id),
+ target_waitstatus_to_string (&thread->last_status));
+
+ /* Pass the last stop reply back to GDB, but don't notify
+ yet. */
+ queue_stop_reply (entry->id, &thread->last_status);
+ }
+ }
+
+ return 0;
+}
+
+/* Set this inferior LWP's state as "want-stopped". We won't resume
+ this LWP until the client gives us another action for it. */
+
+static void
+gdb_wants_thread_stopped (struct inferior_list_entry *entry)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ thread->last_resume_kind = resume_stop;
+
+ if (thread->last_status.kind == TARGET_WAITKIND_IGNORE)
+ {
+ thread->last_status.kind = TARGET_WAITKIND_STOPPED;
+ thread->last_status.value.sig = TARGET_SIGNAL_0;
+ }
+}
+
+/* Set all threads' states as "want-stopped". */
+
+static void
+gdb_wants_all_threads_stopped (void)
+{
+ for_each_inferior (&all_threads, gdb_wants_thread_stopped);
+}
+
+/* Clear the gdb_detached flag of every process. */
+
+static void
+gdb_reattached_process (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ process->gdb_detached = 0;
+}
+
+/* Status handler for the '?' packet. */
+
+static void
+handle_status (char *own_buf)
+{
+ /* GDB is connected, don't forward events to the target anymore. */
+ for_each_inferior (&all_processes, gdb_reattached_process);
+
+ /* In non-stop mode, we must send a stop reply for each stopped
+ thread. In all-stop mode, just send one for the first stopped
+ thread we find. */
+
+ if (non_stop)
+ {
+ discard_queued_stop_replies (-1);
+ find_inferior (&all_threads, queue_stop_reply_callback, NULL);
+
+ /* The first is sent immediatly. OK is sent if there is no
+ stopped thread, which is the same handling of the vStopped
+ packet (by design). */
+ send_next_stop_reply (own_buf);
+ }
+ else
+ {
+ pause_all (0);
+ stabilize_threads ();
+ gdb_wants_all_threads_stopped ();
+
+ if (all_threads.head)
+ {
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_STOPPED;
+ status.value.sig = TARGET_SIGNAL_TRAP;
+ prepare_resume_reply (own_buf,
+ all_threads.head->id, &status);
+ }
+ else
+ strcpy (own_buf, "W00");
+ }
+}
+
+static void
+gdbserver_version (void)
+{
+ printf ("GNU gdbserver %s%s\n"
+ "Copyright (C) 2010 Free Software Foundation, Inc.\n"
+ "gdbserver is free software, covered by the GNU General Public License.\n"
+ "This gdbserver was configured as \"%s\"\n",
+ PKGVERSION, version, host_name);
+}
+
+static void
+gdbserver_usage (FILE *stream)
+{
+ fprintf (stream, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
+ "\tgdbserver [OPTIONS] --attach COMM PID\n"
+ "\tgdbserver [OPTIONS] --multi COMM\n"
+ "\n"
+ "COMM may either be a tty device (for serial debugging), or \n"
+ "HOST:PORT to listen for a TCP connection.\n"
+ "\n"
+ "Options:\n"
+ " --debug Enable general debugging output.\n"
+ " --remote-debug Enable remote protocol debugging output.\n"
+ " --version Display version information and exit.\n"
+ " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n");
+ if (REPORT_BUGS_TO[0] && stream == stdout)
+ fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
+}
+
+static void
+gdbserver_show_disableable (FILE *stream)
+{
+ fprintf (stream, "Disableable packets:\n"
+ " vCont \tAll vCont packets\n"
+ " qC \tQuerying the current thread\n"
+ " qfThreadInfo\tThread listing\n"
+ " Tthread \tPassing the thread specifier in the T stop reply packet\n"
+ " threads \tAll of the above\n");
+}
+
+
+#undef require_running
+#define require_running(BUF) \
+ if (!target_running ()) \
+ { \
+ write_enn (BUF); \
+ break; \
+ }
+
+static int
+first_thread_of (struct inferior_list_entry *entry, void *args)
+{
+ int pid = * (int *) args;
+
+ if (ptid_get_pid (entry->id) == pid)
+ return 1;
+
+ return 0;
+}
+
+static void
+kill_inferior_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+ int pid = ptid_get_pid (process->head.id);
+
+ kill_inferior (pid);
+ discard_queued_stop_replies (pid);
+}
+
+/* Callback for for_each_inferior to detach or kill the inferior,
+ depending on whether we attached to it or not.
+ We inform the user whether we're detaching or killing the process
+ as this is only called when gdbserver is about to exit. */
+
+static void
+detach_or_kill_inferior_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+ int pid = ptid_get_pid (process->head.id);
+
+ if (process->attached)
+ detach_inferior (pid);
+ else
+ kill_inferior (pid);
+
+ discard_queued_stop_replies (pid);
+}
+
+/* for_each_inferior callback for detach_or_kill_for_exit to print
+ the pids of started inferiors. */
+
+static void
+print_started_pid (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ if (! process->attached)
+ {
+ int pid = ptid_get_pid (process->head.id);
+ fprintf (stderr, " %d", pid);
+ }
+}
+
+/* for_each_inferior callback for detach_or_kill_for_exit to print
+ the pids of attached inferiors. */
+
+static void
+print_attached_pid (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ if (process->attached)
+ {
+ int pid = ptid_get_pid (process->head.id);
+ fprintf (stderr, " %d", pid);
+ }
+}
+
+/* Call this when exiting gdbserver with possible inferiors that need
+ to be killed or detached from. */
+
+static void
+detach_or_kill_for_exit (void)
+{
+ /* First print a list of the inferiors we will be killing/detaching.
+ This is to assist the user, for example, in case the inferior unexpectedly
+ dies after we exit: did we screw up or did the inferior exit on its own?
+ Having this info will save some head-scratching. */
+
+ if (have_started_inferiors_p ())
+ {
+ fprintf (stderr, "Killing process(es):");
+ for_each_inferior (&all_processes, print_started_pid);
+ fprintf (stderr, "\n");
+ }
+ if (have_attached_inferiors_p ())
+ {
+ fprintf (stderr, "Detaching process(es):");
+ for_each_inferior (&all_processes, print_attached_pid);
+ fprintf (stderr, "\n");
+ }
+
+ /* Now we can kill or detach the inferiors. */
+
+ for_each_inferior (&all_processes, detach_or_kill_inferior_callback);
+}
+
+static void
+join_inferiors_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ /* If we are attached, then we can exit. Otherwise, we need to hang
+ around doing nothing, until the child is gone. */
+ if (!process->attached)
+ join_inferior (ptid_get_pid (process->head.id));
+}
+
+int
+main (int argc, char *argv[])
+{
+ int bad_attach;
+ int pid;
+ char *arg_end, *port;
+ char **next_arg = &argv[1];
+ int multi_mode = 0;
+ int attach = 0;
+ int was_running;
+
+ while (*next_arg != NULL && **next_arg == '-')
+ {
+ if (strcmp (*next_arg, "--version") == 0)
+ {
+ gdbserver_version ();
+ exit (0);
+ }
+ else if (strcmp (*next_arg, "--help") == 0)
+ {
+ gdbserver_usage (stdout);
+ exit (0);
+ }
+ else if (strcmp (*next_arg, "--attach") == 0)
+ attach = 1;
+ else if (strcmp (*next_arg, "--multi") == 0)
+ multi_mode = 1;
+ else if (strcmp (*next_arg, "--wrapper") == 0)
+ {
+ next_arg++;
+
+ wrapper_argv = next_arg;
+ while (*next_arg != NULL && strcmp (*next_arg, "--") != 0)
+ next_arg++;
+
+ if (next_arg == wrapper_argv || *next_arg == NULL)
+ {
+ gdbserver_usage (stderr);
+ exit (1);
+ }
+
+ /* Consume the "--". */
+ *next_arg = NULL;
+ }
+ else if (strcmp (*next_arg, "--debug") == 0)
+ debug_threads = 1;
+ else if (strcmp (*next_arg, "--remote-debug") == 0)
+ remote_debug = 1;
+ else if (strcmp (*next_arg, "--disable-packet") == 0)
+ {
+ gdbserver_show_disableable (stdout);
+ exit (0);
+ }
+ else if (strncmp (*next_arg,
+ "--disable-packet=",
+ sizeof ("--disable-packet=") - 1) == 0)
+ {
+ char *packets, *tok;
+
+ packets = *next_arg += sizeof ("--disable-packet=") - 1;
+ for (tok = strtok (packets, ",");
+ tok != NULL;
+ tok = strtok (NULL, ","))
+ {
+ if (strcmp ("vCont", tok) == 0)
+ disable_packet_vCont = 1;
+ else if (strcmp ("Tthread", tok) == 0)
+ disable_packet_Tthread = 1;
+ else if (strcmp ("qC", tok) == 0)
+ disable_packet_qC = 1;
+ else if (strcmp ("qfThreadInfo", tok) == 0)
+ disable_packet_qfThreadInfo = 1;
+ else if (strcmp ("threads", tok) == 0)
+ {
+ disable_packet_vCont = 1;
+ disable_packet_Tthread = 1;
+ disable_packet_qC = 1;
+ disable_packet_qfThreadInfo = 1;
+ }
+ else
+ {
+ fprintf (stderr, "Don't know how to disable \"%s\".\n\n",
+ tok);
+ gdbserver_show_disableable (stderr);
+ exit (1);
+ }
+ }
+ }
+ else
+ {
+ fprintf (stderr, "Unknown argument: %s\n", *next_arg);
+ exit (1);
+ }
+
+ next_arg++;
+ continue;
+ }
+
+ if (setjmp (toplevel))
+ {
+ fprintf (stderr, "Exiting\n");
+ exit (1);
+ }
+
+ port = *next_arg;
+ next_arg++;
+ if (port == NULL || (!attach && !multi_mode && *next_arg == NULL))
+ {
+ gdbserver_usage (stderr);
+ exit (1);
+ }
+
+ bad_attach = 0;
+ pid = 0;
+
+ /* --attach used to come after PORT, so allow it there for
+ compatibility. */
+ if (*next_arg != NULL && strcmp (*next_arg, "--attach") == 0)
+ {
+ attach = 1;
+ next_arg++;
+ }
+
+ if (attach
+ && (*next_arg == NULL
+ || (*next_arg)[0] == '\0'
+ || (pid = strtoul (*next_arg, &arg_end, 0)) == 0
+ || *arg_end != '\0'
+ || next_arg[1] != NULL))
+ bad_attach = 1;
+
+ if (bad_attach)
+ {
+ gdbserver_usage (stderr);
+ exit (1);
+ }
+
+ initialize_inferiors ();
+ initialize_async_io ();
+ initialize_low ();
+ if (target_supports_tracepoints ())
+ initialize_tracepoint ();
+
+ own_buf = xmalloc (PBUFSIZ + 1);
+ mem_buf = xmalloc (PBUFSIZ);
+
+ if (pid == 0 && *next_arg != NULL)
+ {
+ int i, n;
+
+ n = argc - (next_arg - argv);
+ program_argv = xmalloc (sizeof (char *) * (n + 1));
+ for (i = 0; i < n; i++)
+ program_argv[i] = xstrdup (next_arg[i]);
+ program_argv[i] = NULL;
+
+ /* Wait till we are at first instruction in program. */
+ start_inferior (program_argv);
+
+ /* We are now (hopefully) stopped at the first instruction of
+ the target process. This assumes that the target process was
+ successfully created. */
+ }
+ else if (pid != 0)
+ {
+ if (attach_inferior (pid) == -1)
+ error ("Attaching not supported on this target");
+
+ /* Otherwise succeeded. */
+ }
+ else
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.integer = 0;
+ last_ptid = minus_one_ptid;
+ }
+
+ /* 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))
+ {
+ detach_or_kill_for_exit ();
+ exit (1);
+ }
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ was_running = 0;
+ else
+ was_running = 1;
+
+ if (!was_running && !multi_mode)
+ {
+ fprintf (stderr, "No program to debug. GDBserver exiting.\n");
+ exit (1);
+ }
while (1)
{
- remote_open (argv[1]);
+ noack_mode = 0;
+ multi_process = 0;
+ /* Be sure we're out of tfind mode. */
+ current_traceframe = -1;
- restart:
- setjmp (toplevel);
- while (1)
+ remote_open (port);
+
+ if (setjmp (toplevel) != 0)
{
- unsigned char sig;
- int packet_len;
- int new_packet_len = -1;
+ /* An error occurred. */
+ if (response_needed)
+ {
+ write_enn (own_buf);
+ putpkt (own_buf);
+ }
+ }
- packet_len = getpkt (own_buf);
- if (packet_len <= 0)
- break;
+ /* Wait for events. This will return when all event sources are
+ removed from the event loop. */
+ start_event_loop ();
- i = 0;
- ch = own_buf[i++];
- switch (ch)
+ /* If an exit was requested (using the "monitor exit" command),
+ terminate now. The only other way to get here is for
+ getpkt to fail; close the connection and reopen it at the
+ top of the loop. */
+
+ if (exit_requested)
+ {
+ detach_or_kill_for_exit ();
+ exit (0);
+ }
+
+ fprintf (stderr,
+ "Remote side has terminated connection. "
+ "GDBserver will reopen the connection.\n");
+
+ if (tracing)
+ {
+ if (disconnected_tracing)
{
- case 'q':
- handle_query (own_buf, &new_packet_len);
- break;
- case 'Q':
- handle_general_set (own_buf);
+ /* Try to enable non-stop/async mode, so we we can both
+ wait for an async socket accept, and handle async
+ target events simultaneously. There's also no point
+ either in having the target always stop all threads,
+ when we're going to pass signals down without
+ informing GDB. */
+ if (!non_stop)
+ {
+ if (start_non_stop (1))
+ non_stop = 1;
+
+ /* Detaching implicitly resumes all threads; simply
+ disconnecting does not. */
+ }
+ }
+ else
+ {
+ fprintf (stderr,
+ "Disconnected tracing disabled; stopping trace run.\n");
+ stop_tracing ();
+ }
+ }
+ }
+}
+
+/* Event loop callback that handles a serial event. The first byte in
+ the serial buffer gets us here. We expect characters to arrive at
+ a brisk pace, so we read the rest of the packet with a blocking
+ getpkt call. */
+
+static int
+process_serial_event (void)
+{
+ char ch;
+ int i = 0;
+ int signal;
+ unsigned int len;
+ CORE_ADDR mem_addr;
+ int pid;
+ unsigned char sig;
+ int packet_len;
+ int new_packet_len = -1;
+
+ /* Used to decide when gdbserver should exit in
+ multi-mode/remote. */
+ static int have_ran = 0;
+
+ if (!have_ran)
+ have_ran = target_running ();
+
+ disable_async_io ();
+
+ response_needed = 0;
+ packet_len = getpkt (own_buf);
+ if (packet_len <= 0)
+ {
+ remote_close ();
+ /* Force an event loop break. */
+ return -1;
+ }
+ response_needed = 1;
+
+ i = 0;
+ ch = own_buf[i++];
+ switch (ch)
+ {
+ case 'q':
+ handle_query (own_buf, packet_len, &new_packet_len);
+ break;
+ case 'Q':
+ handle_general_set (own_buf);
+ break;
+ case 'D':
+ require_running (own_buf);
+
+ if (multi_process)
+ {
+ i++; /* skip ';' */
+ pid = strtol (&own_buf[i], NULL, 16);
+ }
+ else
+ pid =
+ ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id);
+
+ if (tracing && disconnected_tracing)
+ {
+ struct thread_resume resume_info;
+ struct process_info *process = find_process_pid (pid);
+
+ if (process == NULL)
+ {
+ write_enn (own_buf);
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 ();
- write_ok (own_buf);
+ }
+
+ fprintf (stderr,
+ "Disconnected tracing in effect, "
+ "leaving gdbserver attached to the process\n");
+
+ /* Make sure we're in non-stop/async mode, so we we can both
+ wait for an async socket accept, and handle async target
+ events simultaneously. There's also no point either in
+ having the target stop all threads, when we're going to
+ pass signals down without informing GDB. */
+ if (!non_stop)
+ {
+ if (debug_threads)
+ fprintf (stderr, "Forcing non-stop mode\n");
+
+ non_stop = 1;
+ start_non_stop (1);
+ }
+
+ process->gdb_detached = 1;
+
+ /* Detaching implicitly resumes all threads. */
+ resume_info.thread = minus_one_ptid;
+ resume_info.kind = resume_continue;
+ resume_info.sig = 0;
+ (*the_target->resume) (&resume_info, 1);
+
+ write_ok (own_buf);
+ break; /* from switch/case */
+ }
+
+ fprintf (stderr, "Detaching from process %d\n", pid);
+ stop_tracing ();
+ if (detach_inferior (pid) != 0)
+ write_enn (own_buf);
+ else
+ {
+ discard_queued_stop_replies (pid);
+ write_ok (own_buf);
+
+ if (extended_protocol)
+ {
+ /* Treat this like a normal program exit. */
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.integer = 0;
+ last_ptid = pid_to_ptid (pid);
+
+ current_inferior = NULL;
+ }
+ else
+ {
putpkt (own_buf);
remote_close ();
- /* If we are attached, then we can exit. Otherwise, we need to
- hang around doing nothing, until the child is gone. */
- if (!attached)
- {
- int status, ret;
+ /* If we are attached, then we can exit. Otherwise, we
+ need to hang around doing nothing, until the child is
+ gone. */
+ for_each_inferior (&all_processes,
+ join_inferiors_callback);
+ exit (0);
+ }
+ }
+ break;
+ case '!':
+ extended_protocol = 1;
+ write_ok (own_buf);
+ break;
+ case '?':
+ handle_status (own_buf);
+ break;
+ case 'H':
+ if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
+ {
+ ptid_t gdb_id, thread_id;
+ int pid;
- do {
- ret = waitpid (signal_pid, &status, 0);
- if (WIFEXITED (status) || WIFSIGNALED (status))
- break;
- } while (ret != -1 || errno != ECHILD);
- }
+ require_running (own_buf);
- exit (0);
-#endif
+ gdb_id = read_ptid (&own_buf[2], NULL);
- 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");
+ pid = ptid_get_pid (gdb_id);
- /* Wait till we are at 1st instruction in prog. */
- signal = start_inferior (&argv[2], &status);
- goto restart;
- break;
- }
- else
+ if (ptid_equal (gdb_id, null_ptid)
+ || ptid_equal (gdb_id, minus_one_ptid))
+ thread_id = null_ptid;
+ else if (pid != 0
+ && ptid_equal (pid_to_ptid (pid),
+ gdb_id))
+ {
+ struct thread_info *thread =
+ (struct thread_info *) find_inferior (&all_threads,
+ first_thread_of,
+ &pid);
+ if (!thread)
{
- 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);
+ thread_id = ((struct inferior_list_entry *)thread)->id;
+ }
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)
+ thread_id = gdb_id_to_thread_id (gdb_id);
+ if (ptid_equal (thread_id, null_ptid))
{
- 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;
+ write_enn (own_buf);
break;
}
- else
+ }
+
+ if (own_buf[1] == 'g')
+ {
+ if (ptid_equal (thread_id, null_ptid))
{
- fprintf (stderr, "GDBserver exiting\n");
- exit (0);
+ /* GDB is telling us to choose any thread. Check if
+ the currently selected thread is still valid. If
+ it is not, select the first available. */
+ struct thread_info *thread =
+ (struct thread_info *) find_inferior_id (&all_threads,
+ general_thread);
+ if (thread == NULL)
+ thread_id = all_threads.head->id;
}
+
+ general_thread = thread_id;
+ set_desired_inferior (1);
}
+ else if (own_buf[1] == 'c')
+ cont_thread = thread_id;
+ 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':
+ require_running (own_buf);
+ if (current_traceframe >= 0)
+ {
+ struct regcache *regcache = new_register_cache ();
+
+ if (fetch_traceframe_registers (current_traceframe,
+ regcache, -1) == 0)
+ registers_to_string (regcache, own_buf);
+ else
+ write_enn (own_buf);
+ free_register_cache (regcache);
+ }
+ else
+ {
+ struct regcache *regcache;
+
+ set_desired_inferior (1);
+ regcache = get_thread_regcache (current_inferior, 1);
+ registers_to_string (regcache, own_buf);
+ }
+ break;
+ case 'G':
+ require_running (own_buf);
+ if (current_traceframe >= 0)
+ write_enn (own_buf);
+ else
+ {
+ struct regcache *regcache;
+
+ set_desired_inferior (1);
+ regcache = get_thread_regcache (current_inferior, 1);
+ registers_from_string (regcache, &own_buf[1]);
+ write_ok (own_buf);
+ }
+ break;
+ case 'm':
+ require_running (own_buf);
+ decode_m_packet (&own_buf[1], &mem_addr, &len);
+ if (read_memory (mem_addr, mem_buf, len) == 0)
+ convert_int_to_ascii (mem_buf, own_buf, len);
+ else
+ write_enn (own_buf);
+ break;
+ case 'M':
+ require_running (own_buf);
+ decode_M_packet (&own_buf[1], &mem_addr, &len, &mem_buf);
+ if (write_memory (mem_addr, mem_buf, len) == 0)
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ break;
+ case 'X':
+ require_running (own_buf);
+ if (decode_X_packet (&own_buf[1], packet_len - 1,
+ &mem_addr, &len, &mem_buf) < 0
+ || write_memory (mem_addr, mem_buf, len) != 0)
+ write_enn (own_buf);
+ else
+ write_ok (own_buf);
+ break;
+ case 'C':
+ require_running (own_buf);
+ convert_ascii_to_int (own_buf + 1, &sig, 1);
+ if (target_signal_to_host_p (sig))
+ signal = target_signal_to_host (sig);
+ else
+ signal = 0;
+ myresume (own_buf, 0, signal);
+ break;
+ case 'S':
+ require_running (own_buf);
+ convert_ascii_to_int (own_buf + 1, &sig, 1);
+ if (target_signal_to_host_p (sig))
+ signal = target_signal_to_host (sig);
+ else
+ signal = 0;
+ myresume (own_buf, 1, signal);
+ break;
+ case 'c':
+ require_running (own_buf);
+ signal = 0;
+ myresume (own_buf, 0, signal);
+ break;
+ case 's':
+ require_running (own_buf);
+ signal = 0;
+ myresume (own_buf, 1, signal);
+ break;
+ case 'Z': /* insert_ ... */
+ /* Fallthrough. */
+ case 'z': /* remove_ ... */
+ {
+ char *lenptr;
+ char *dataptr;
+ CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
+ int len = strtol (lenptr + 1, &dataptr, 16);
+ char type = own_buf[1];
+ int res;
+ const int insert = ch == 'Z';
+
+ /* Default to unrecognized/unsupported. */
+ res = 1;
+ switch (type)
+ {
+ case '0': /* software-breakpoint */
+ case '1': /* hardware-breakpoint */
+ case '2': /* write watchpoint */
+ case '3': /* read watchpoint */
+ case '4': /* access watchpoint */
+ require_running (own_buf);
+ if (insert && the_target->insert_point != NULL)
+ res = (*the_target->insert_point) (type, addr, len);
+ else if (!insert && the_target->remove_point != NULL)
+ res = (*the_target->remove_point) (type, addr, len);
+ break;
+ default:
+ break;
+ }
+
+ if (res == 0)
+ write_ok (own_buf);
+ else if (res == 1)
+ /* Unsupported. */
+ own_buf[0] = '\0';
+ else
+ write_enn (own_buf);
+ break;
+ }
+ case 'k':
+ response_needed = 0;
+ if (!target_running ())
+ /* The packet we received doesn't make sense - but we can't
+ reply to it, either. */
+ return 0;
+
+ fprintf (stderr, "Killing all inferiors\n");
+ for_each_inferior (&all_processes, kill_inferior_callback);
+
+ /* When using the extended protocol, we wait with no program
+ running. The traditional protocol will exit instead. */
+ if (extended_protocol)
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ return 0;
}
+ else
+ exit (0);
+
+ case 'T':
+ {
+ ptid_t gdb_id, thread_id;
- /* We come here when getpkt fails.
+ require_running (own_buf);
+
+ gdb_id = read_ptid (&own_buf[1], NULL);
+ thread_id = gdb_id_to_thread_id (gdb_id);
+ if (ptid_equal (thread_id, null_ptid))
+ {
+ write_enn (own_buf);
+ break;
+ }
- For the extended remote protocol we exit (and this is the only
- way we gracefully exit!).
+ if (mythread_alive (thread_id))
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ }
+ break;
+ case 'R':
+ response_needed = 0;
- For the traditional remote protocol close the connection,
- and re-open it at the top of the loop. */
+ /* Restarting the inferior is only supported in the extended
+ protocol. */
if (extended_protocol)
{
+ if (target_running ())
+ for_each_inferior (&all_processes,
+ kill_inferior_callback);
+ fprintf (stderr, "GDBserver restarting\n");
+
+ /* Wait till we are at 1st instruction in prog. */
+ if (program_argv != NULL)
+ start_inferior (program_argv);
+ else
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ }
+ return 0;
+ }
+ else
+ {
+ /* It is a request we don't understand. Respond with an
+ empty packet so that gdb knows that we don't support this
+ request. */
+ own_buf[0] = '\0';
+ break;
+ }
+ case 'v':
+ /* Extended (long) request. */
+ handle_v_requests (own_buf, packet_len, &new_packet_len);
+ break;
+
+ default:
+ /* It is a request we don't understand. Respond with an empty
+ packet so that gdb knows that we don't support this
+ request. */
+ own_buf[0] = '\0';
+ break;
+ }
+
+ if (new_packet_len != -1)
+ putpkt_binary (own_buf, new_packet_len);
+ else
+ putpkt (own_buf);
+
+ response_needed = 0;
+
+ if (!extended_protocol && have_ran && !target_running ())
+ {
+ /* In non-stop, defer exiting until GDB had a chance to query
+ the whole vStopped list (until it gets an OK). */
+ if (!notif_queue)
+ {
+ fprintf (stderr, "GDBserver exiting\n");
remote_close ();
exit (0);
}
+ }
+
+ if (exit_requested)
+ return -1;
+
+ return 0;
+}
+
+/* Event-loop callback for serial events. */
+
+int
+handle_serial_event (int err, gdb_client_data client_data)
+{
+ if (debug_threads)
+ fprintf (stderr, "handling possible serial event\n");
+
+ /* Really handle it. */
+ if (process_serial_event () < 0)
+ return -1;
+
+ /* Be sure to not change the selected inferior behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_inferior (1);
+
+ return 0;
+}
+
+/* Event-loop callback for target events. */
+
+int
+handle_target_event (int err, gdb_client_data client_data)
+{
+ if (debug_threads)
+ fprintf (stderr, "handling possible target event\n");
+
+ last_ptid = mywait (minus_one_ptid, &last_status,
+ TARGET_WNOHANG, 1);
+
+ if (last_status.kind != TARGET_WAITKIND_IGNORE)
+ {
+ int pid = ptid_get_pid (last_ptid);
+ struct process_info *process = find_process_pid (pid);
+ int forward_event = !gdb_connected () || process->gdb_detached;
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ {
+ mark_breakpoints_out (process);
+ mourn_inferior (process);
+ }
+
+ if (forward_event)
+ {
+ if (!target_running ())
+ {
+ /* The last process exited. We're done. */
+ exit (0);
+ }
+
+ if (last_status.kind == TARGET_WAITKIND_STOPPED)
+ {
+ /* A thread stopped with a signal, but gdb isn't
+ connected to handle it. Pass it down to the
+ inferior, as if it wasn't being traced. */
+ struct thread_resume resume_info;
+
+ if (debug_threads)
+ fprintf (stderr,
+ "GDB not connected; forwarding event %d for [%s]\n",
+ (int) last_status.kind,
+ target_pid_to_str (last_ptid));
+
+ resume_info.thread = last_ptid;
+ resume_info.kind = resume_continue;
+ resume_info.sig = last_status.value.sig;
+ (*the_target->resume) (&resume_info, 1);
+ }
+ else if (debug_threads)
+ fprintf (stderr, "GDB not connected; ignoring event %d for [%s]\n",
+ (int) last_status.kind,
+ target_pid_to_str (last_ptid));
+ }
else
{
- fprintf (stderr, "Remote side has terminated connection. "
- "GDBserver will reopen the connection.\n");
- remote_close ();
+ /* Something interesting. Tell GDB about it. */
+ push_event (last_ptid, &last_status);
}
}
+
+ /* Be sure to not change the selected inferior behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_inferior (1);
+
+ return 0;
}
projects / deliverable / binutils-gdb.git / blobdiff