/* Main code for remote server for GDB.
- Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 1989-2016 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
+#include "gdbthread.h"
+#include "agent.h"
+#include "notif.h"
+#include "tdesc.h"
+#include "rsp-low.h"
-#if HAVE_UNISTD_H
+#include <ctype.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
+#include "gdb_vecs.h"
+#include "gdb_wait.h"
+#include "btrace-common.h"
+#include "filestuff.h"
+#include "tracepoint.h"
+#include "dll.h"
+#include "hostio.h"
+
+/* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
+ `vCont'. Note the multi-process extensions made `vCont' a
+ requirement, so `Hc pPID.TID' is pretty much undefined. So
+ CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
+ resuming all threads of the process (again, `Hc' isn't used for
+ multi-process), or a specific thread ptid_t. */
+ptid_t cont_thread;
+
+/* The thread set with an `Hg' packet. */
+ptid_t general_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 server_waiting;
static int extended_protocol;
-static int attached;
static int response_needed;
static int exit_requested;
-static char **program_argv, **wrapper_argv;
+/* --once: Exit after the first connection has closed. */
+int run_once;
-/* Enable miscellaneous debugging output. The name is historical - it
- was originally used to debug LinuxThreads support. */
-int debug_threads;
+int multi_process;
+int report_fork_events;
+int report_vfork_events;
+int report_exec_events;
+int report_thread_events;
-int pass_signals[TARGET_SIGNAL_LAST];
+/* Whether to report TARGET_WAITKING_NO_RESUMED events. */
+static int report_no_resumed;
-jmp_buf toplevel;
+int non_stop;
+int swbreak_feature;
+int hwbreak_feature;
+
+/* True if the "vContSupported" feature is active. In that case, GDB
+ wants us to report whether single step is supported in the reply to
+ "vCont?" packet. */
+static int vCont_supported;
+
+/* Whether we should attempt to disable the operating system's address
+ space randomization feature before starting an inferior. */
+int disable_randomization = 1;
+
+static char **program_argv, **wrapper_argv;
-const char *gdbserver_xmltarget;
+int pass_signals[GDB_SIGNAL_LAST];
+int program_signals[GDB_SIGNAL_LAST];
+int program_signals_p;
/* The PID of the originally created or attached inferior. Used to
send signals to the process when GDB sends us an asynchronous interrupt
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;
+
+/* A sub-class of 'struct notif_event' for stop, holding information
+ relative to a single stop reply. We keep a queue of these to
+ push to GDB in non-stop mode. */
+
+struct vstop_notif
+{
+ struct notif_event base;
+
+ /* Thread or process that got the event. */
+ ptid_t ptid;
+
+ /* Event info. */
+ struct target_waitstatus status;
+};
+
+/* The current btrace configuration. This is gdbserver's mirror of GDB's
+ btrace configuration. */
+static struct btrace_config current_btrace_conf;
+
+DEFINE_QUEUE_P (notif_event_p);
+
+/* 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 = XNEW (struct vstop_notif);
+
+ new_notif->ptid = ptid;
+ new_notif->status = *status;
+
+ notif_event_enque (¬if_stop, (struct notif_event *) new_notif);
+}
+
+static int
+remove_all_on_match_ptid (QUEUE (notif_event_p) *q,
+ QUEUE_ITER (notif_event_p) *iter,
+ struct notif_event *event,
+ void *data)
+{
+ ptid_t filter_ptid = *(ptid_t *) data;
+ struct vstop_notif *vstop_event = (struct vstop_notif *) event;
+
+ if (ptid_match (vstop_event->ptid, filter_ptid))
+ {
+ if (q->free_func != NULL)
+ q->free_func (event);
+
+ QUEUE_remove_elem (notif_event_p, q, iter);
+ }
+
+ return 1;
+}
+
+/* See server.h. */
+
+void
+discard_queued_stop_replies (ptid_t ptid)
+{
+ QUEUE_iterate (notif_event_p, notif_stop.queue,
+ remove_all_on_match_ptid, &ptid);
+}
+
+static void
+vstop_notif_reply (struct notif_event *event, char *own_buf)
+{
+ struct vstop_notif *vstop = (struct vstop_notif *) event;
+
+ prepare_resume_reply (own_buf, vstop->ptid, &vstop->status);
+}
+
+struct notif_server notif_stop =
+{
+ "vStopped", "Stop", NULL, vstop_notif_reply,
+};
+
static int
target_running (void)
{
- return all_threads.head != NULL;
+ return get_first_thread () != NULL;
}
static int
-start_inferior (char **argv, char *statusptr)
+start_inferior (char **argv)
{
char **new_argv = argv;
- attached = 0;
if (wrapper_argv != NULL)
{
count++;
for (i = 0; argv[i] != NULL; i++)
count++;
- new_argv = alloca (sizeof (char *) * count);
+ new_argv = XALLOCAVEC (char *, count);
count = 0;
for (i = 0; wrapper_argv[i] != NULL; i++)
new_argv[count++] = wrapper_argv[i];
new_argv[count] = NULL;
}
+ if (debug_threads)
+ {
+ int i;
+ for (i = 0; new_argv[i]; ++i)
+ debug_printf ("new_argv[%d] = \"%s\"\n", i, new_argv[i]);
+ debug_flush ();
+ }
+
#ifdef SIGTTOU
signal (SIGTTOU, SIG_DFL);
signal (SIGTTIN, SIG_DFL);
if (wrapper_argv != NULL)
{
struct thread_resume resume_info;
- int sig;
- resume_info.thread = -1;
- resume_info.step = 0;
+ memset (&resume_info, 0, sizeof (resume_info));
+ resume_info.thread = pid_to_ptid (signal_pid);
+ resume_info.kind = resume_continue;
resume_info.sig = 0;
- resume_info.leave_stopped = 0;
- sig = mywait (statusptr, 0);
- if (*statusptr != 'T')
- return sig;
+ last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
- do
+ if (last_status.kind == TARGET_WAITKIND_STOPPED)
{
- (*the_target->resume) (&resume_info);
+ do
+ {
+ (*the_target->resume) (&resume_info, 1);
+
+ last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+ if (last_status.kind != TARGET_WAITKIND_STOPPED)
+ break;
- sig = mywait (statusptr, 0);
- if (*statusptr != 'T')
- return sig;
+ current_thread->last_resume_kind = resume_stop;
+ current_thread->last_status = last_status;
+ }
+ while (last_status.value.sig != GDB_SIGNAL_TRAP);
}
- while (sig != TARGET_SIGNAL_TRAP);
+ target_post_create_inferior ();
+ 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 sig;
+ target_post_create_inferior ();
+
+ if (last_status.kind != TARGET_WAITKIND_EXITED
+ && last_status.kind != TARGET_WAITKIND_SIGNALLED)
+ {
+ current_thread->last_resume_kind = resume_stop;
+ current_thread->last_status = last_status;
}
+ else
+ mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
- /* Wait till we are at 1st instruction in program, return signal
- number (assuming success). */
- return mywait (statusptr, 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. */
if (myattach (pid) != 0)
return -1;
- attached = 1;
-
fprintf (stderr, "Attached; pid = %d\n", pid);
fflush (stderr);
whichever we were told to attach to. */
signal_pid = pid;
- *sigptr = mywait (statusptr, 0);
+ 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 == GDB_SIGNAL_STOP)
+ last_status.value.sig = GDB_SIGNAL_TRAP;
- /* 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;
+ current_thread->last_resume_kind = resume_stop;
+ current_thread->last_status = last_status;
+ }
return 0;
}
or -1 otherwise. */
static int
-decode_xfer_read (char *buf, char **annex, CORE_ADDR *ofs, unsigned int *len)
+decode_xfer_read (char *buf, CORE_ADDR *ofs, unsigned int *len)
+{
+ /* After the read marker and annex, qXfer looks like a
+ traditional 'm' packet. */
+ decode_m_packet (buf, ofs, len);
+
+ return 0;
+}
+
+static int
+decode_xfer (char *buf, char **object, char **rw, char **annex, char **offset)
{
+ /* Extract and NUL-terminate the object. */
+ *object = buf;
+ while (*buf && *buf != ':')
+ buf++;
+ if (*buf == '\0')
+ return -1;
+ *buf++ = 0;
+
+ /* Extract and NUL-terminate the read/write action. */
+ *rw = buf;
+ while (*buf && *buf != ':')
+ buf++;
+ if (*buf == '\0')
+ return -1;
+ *buf++ = 0;
+
/* Extract and NUL-terminate the annex. */
*annex = buf;
while (*buf && *buf != ':')
return -1;
*buf++ = 0;
- /* After the read marker and annex, qXfer looks like a
- traditional 'm' packet. */
- decode_m_packet (buf, ofs, len);
-
+ *offset = buf;
return 0;
}
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)
+write_qxfer_response (char *buf, const gdb_byte *data, int len, int is_more)
{
int out_len;
else
buf[0] = 'l';
- return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len,
- PBUFSIZ - 2) + 1;
+ return remote_escape_output (data, len, 1, (unsigned char *) buf + 1,
+ &out_len, PBUFSIZ - 2) + 1;
+}
+
+/* Handle btrace enabling in BTS format. */
+
+static const char *
+handle_btrace_enable_bts (struct thread_info *thread)
+{
+ if (thread->btrace != NULL)
+ return "E.Btrace already enabled.";
+
+ current_btrace_conf.format = BTRACE_FORMAT_BTS;
+ thread->btrace = target_enable_btrace (thread->entry.id,
+ ¤t_btrace_conf);
+ if (thread->btrace == NULL)
+ return "E.Could not enable btrace.";
+
+ return NULL;
+}
+
+/* Handle btrace enabling in Intel Processor Trace format. */
+
+static const char *
+handle_btrace_enable_pt (struct thread_info *thread)
+{
+ if (thread->btrace != NULL)
+ return "E.Btrace already enabled.";
+
+ current_btrace_conf.format = BTRACE_FORMAT_PT;
+ thread->btrace = target_enable_btrace (thread->entry.id,
+ ¤t_btrace_conf);
+ if (thread->btrace == NULL)
+ return "E.Could not enable btrace.";
+
+ return NULL;
+}
+
+/* Handle btrace disabling. */
+
+static const char *
+handle_btrace_disable (struct thread_info *thread)
+{
+
+ if (thread->btrace == NULL)
+ return "E.Branch tracing not enabled.";
+
+ if (target_disable_btrace (thread->btrace) != 0)
+ return "E.Could not disable branch tracing.";
+
+ thread->btrace = NULL;
+ return NULL;
+}
+
+/* Handle the "Qbtrace" packet. */
+
+static int
+handle_btrace_general_set (char *own_buf)
+{
+ struct thread_info *thread;
+ const char *err;
+ char *op;
+
+ if (!startswith (own_buf, "Qbtrace:"))
+ return 0;
+
+ op = own_buf + strlen ("Qbtrace:");
+
+ if (ptid_equal (general_thread, null_ptid)
+ || ptid_equal (general_thread, minus_one_ptid))
+ {
+ strcpy (own_buf, "E.Must select a single thread.");
+ return -1;
+ }
+
+ thread = find_thread_ptid (general_thread);
+ if (thread == NULL)
+ {
+ strcpy (own_buf, "E.No such thread.");
+ return -1;
+ }
+
+ err = NULL;
+
+ if (strcmp (op, "bts") == 0)
+ err = handle_btrace_enable_bts (thread);
+ else if (strcmp (op, "pt") == 0)
+ err = handle_btrace_enable_pt (thread);
+ else if (strcmp (op, "off") == 0)
+ err = handle_btrace_disable (thread);
+ else
+ err = "E.Bad Qbtrace operation. Use bts, pt, or off.";
+
+ if (err != 0)
+ strcpy (own_buf, err);
+ else
+ write_ok (own_buf);
+
+ return 1;
+}
+
+/* Handle the "Qbtrace-conf" packet. */
+
+static int
+handle_btrace_conf_general_set (char *own_buf)
+{
+ struct thread_info *thread;
+ char *op;
+
+ if (!startswith (own_buf, "Qbtrace-conf:"))
+ return 0;
+
+ op = own_buf + strlen ("Qbtrace-conf:");
+
+ if (ptid_equal (general_thread, null_ptid)
+ || ptid_equal (general_thread, minus_one_ptid))
+ {
+ strcpy (own_buf, "E.Must select a single thread.");
+ return -1;
+ }
+
+ thread = find_thread_ptid (general_thread);
+ if (thread == NULL)
+ {
+ strcpy (own_buf, "E.No such thread.");
+ return -1;
+ }
+
+ if (startswith (op, "bts:size="))
+ {
+ unsigned long size;
+ char *endp = NULL;
+
+ errno = 0;
+ size = strtoul (op + strlen ("bts:size="), &endp, 16);
+ if (endp == NULL || *endp != 0 || errno != 0 || size > UINT_MAX)
+ {
+ strcpy (own_buf, "E.Bad size value.");
+ return -1;
+ }
+
+ current_btrace_conf.bts.size = (unsigned int) size;
+ }
+ else if (strncmp (op, "pt:size=", strlen ("pt:size=")) == 0)
+ {
+ unsigned long size;
+ char *endp = NULL;
+
+ errno = 0;
+ size = strtoul (op + strlen ("pt:size="), &endp, 16);
+ if (endp == NULL || *endp != 0 || errno != 0 || size > UINT_MAX)
+ {
+ strcpy (own_buf, "E.Bad size value.");
+ return -1;
+ }
+
+ current_btrace_conf.pt.size = (unsigned int) size;
+ }
+ else
+ {
+ strcpy (own_buf, "E.Bad Qbtrace configuration option.");
+ return -1;
+ }
+
+ write_ok (own_buf);
+ return 1;
}
/* Handle all of the extended 'Q' packets. */
-void
+
+static void
handle_general_set (char *own_buf)
{
- if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0)
+ if (startswith (own_buf, "QPassSignals:"))
{
- int numsigs = (int) TARGET_SIGNAL_LAST, i;
+ int numsigs = (int) GDB_SIGNAL_LAST, i;
const char *p = own_buf + strlen ("QPassSignals:");
CORE_ADDR cursig;
return;
}
+ if (startswith (own_buf, "QProgramSignals:"))
+ {
+ int numsigs = (int) GDB_SIGNAL_LAST, i;
+ const char *p = own_buf + strlen ("QProgramSignals:");
+ CORE_ADDR cursig;
+
+ program_signals_p = 1;
+
+ p = decode_address_to_semicolon (&cursig, p);
+ for (i = 0; i < numsigs; i++)
+ {
+ if (i == cursig)
+ {
+ program_signals[i] = 1;
+ if (*p == '\0')
+ /* Keep looping, to clear the remaining signals. */
+ cursig = -1;
+ else
+ p = decode_address_to_semicolon (&cursig, p);
+ }
+ else
+ program_signals[i] = 0;
+ }
+ strcpy (own_buf, "OK");
+ return;
+ }
+
+ if (startswith (own_buf, "QCatchSyscalls:"))
+ {
+ const char *p = own_buf + sizeof ("QCatchSyscalls:") - 1;
+ int enabled = -1;
+ CORE_ADDR sysno;
+ struct process_info *process;
+
+ if (!target_running () || !target_supports_catch_syscall ())
+ {
+ write_enn (own_buf);
+ return;
+ }
+
+ if (strcmp (p, "0") == 0)
+ enabled = 0;
+ else if (p[0] == '1' && (p[1] == ';' || p[1] == '\0'))
+ enabled = 1;
+ else
+ {
+ fprintf (stderr, "Unknown catch-syscalls mode requested: %s\n",
+ own_buf);
+ write_enn (own_buf);
+ return;
+ }
+
+ process = current_process ();
+ VEC_truncate (int, process->syscalls_to_catch, 0);
+
+ if (enabled)
+ {
+ p += 1;
+ if (*p == ';')
+ {
+ p += 1;
+ while (*p != '\0')
+ {
+ p = decode_address_to_semicolon (&sysno, p);
+ VEC_safe_push (int, process->syscalls_to_catch, (int) sysno);
+ }
+ }
+ else
+ VEC_safe_push (int, process->syscalls_to_catch, ANY_SYSCALL);
+ }
+
+ write_ok (own_buf);
+ return;
+ }
+
if (strcmp (own_buf, "QStartNoAckMode") == 0)
{
if (remote_debug)
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)
-{
- /* 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".
-
- This variable is set up from the auto-generated
- init_registers_... routine for the current target. */
-
- if (gdbserver_xmltarget
- && strcmp (annex, "target.xml") == 0)
+ if (startswith (own_buf, "QNonStop:"))
{
- if (*gdbserver_xmltarget == '@')
- return gdbserver_xmltarget + 1;
+ char *mode = own_buf + 9;
+ int req = -1;
+ const char *req_str;
+
+ if (strcmp (mode, "0") == 0)
+ req = 0;
+ else if (strcmp (mode, "1") == 0)
+ req = 1;
else
- annex = gdbserver_xmltarget;
- }
+ {
+ /* 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;
+ }
-#ifdef USE_XML
- {
- extern const char *const xml_builtin[][2];
- int i;
+ 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;
+ }
- /* Look for the annex. */
- for (i = 0; xml_builtin[i][0] != NULL; i++)
- if (strcmp (annex, xml_builtin[i][0]) == 0)
- break;
+ non_stop = req;
- if (xml_builtin[i][0] != NULL)
- return xml_builtin[i][1];
- }
-#endif
+ if (remote_debug)
+ fprintf (stderr, "[%s mode enabled]\n", req_str);
- return NULL;
-}
+ write_ok (own_buf);
+ return;
+ }
-void
-monitor_show_help (void)
+ if (startswith (own_buf, "QDisableRandomization:"))
+ {
+ char *packet = own_buf + strlen ("QDisableRandomization:");
+ ULONGEST setting;
+
+ unpack_varlen_hex (packet, &setting);
+ disable_randomization = setting;
+
+ if (remote_debug)
+ {
+ if (disable_randomization)
+ fprintf (stderr, "[address space randomization disabled]\n");
+ else
+ fprintf (stderr, "[address space randomization enabled]\n");
+ }
+
+ write_ok (own_buf);
+ return;
+ }
+
+ if (target_supports_tracepoints ()
+ && handle_tracepoint_general_set (own_buf))
+ return;
+
+ if (startswith (own_buf, "QAgent:"))
+ {
+ char *mode = own_buf + strlen ("QAgent:");
+ int req = 0;
+
+ if (strcmp (mode, "0") == 0)
+ req = 0;
+ else if (strcmp (mode, "1") == 0)
+ req = 1;
+ else
+ {
+ /* We don't know what this value is, so complain to GDB. */
+ sprintf (own_buf, "E.Unknown QAgent value");
+ return;
+ }
+
+ /* Update the flag. */
+ use_agent = req;
+ if (remote_debug)
+ fprintf (stderr, "[%s agent]\n", req ? "Enable" : "Disable");
+ write_ok (own_buf);
+ return;
+ }
+
+ if (handle_btrace_general_set (own_buf))
+ return;
+
+ if (handle_btrace_conf_general_set (own_buf))
+ return;
+
+ if (startswith (own_buf, "QThreadEvents:"))
+ {
+ char *mode = own_buf + strlen ("QThreadEvents:");
+ enum tribool req = TRIBOOL_UNKNOWN;
+
+ if (strcmp (mode, "0") == 0)
+ req = TRIBOOL_FALSE;
+ else if (strcmp (mode, "1") == 0)
+ req = TRIBOOL_TRUE;
+ else
+ {
+ char *mode_copy = xstrdup (mode);
+
+ /* We don't know what this mode is, so complain to GDB. */
+ sprintf (own_buf, "E.Unknown thread-events mode requested: %s\n",
+ mode_copy);
+ xfree (mode_copy);
+ return;
+ }
+
+ report_thread_events = (req == TRIBOOL_TRUE);
+
+ if (remote_debug)
+ {
+ const char *req_str = report_thread_events ? "enabled" : "disabled";
+
+ fprintf (stderr, "[thread events are now %s]\n", req_str);
+ }
+
+ write_ok (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)
+{
+ const struct target_desc *desc = current_target_desc ();
+
+ /* `desc->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".
+
+ This variable is set up from the auto-generated
+ init_registers_... routine for the current target. */
+
+ if (desc->xmltarget != NULL && strcmp (annex, "target.xml") == 0)
+ {
+ if (*desc->xmltarget == '@')
+ return desc->xmltarget + 1;
+ else
+ annex = desc->xmltarget;
+ }
+
+#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;
+}
+
+static void
+monitor_show_help (void)
{
monitor_output ("The following monitor commands are supported:\n");
monitor_output (" set debug <0|1>\n");
- monitor_output (" Enable general debugging messages\n");
+ monitor_output (" 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 (" set debug-format option1[,option2,...]\n");
+ monitor_output (" Add additional information to debugging messages\n");
+ monitor_output (" Options: all, none");
+ monitor_output (", timestamp");
+ monitor_output ("\n");
monitor_output (" exit\n");
monitor_output (" Quit GDBserver\n");
}
+/* Read trace frame or inferior memory. Returns the number of bytes
+ actually read, zero when no further transfer is possible, and -1 on
+ error. Return of a positive value smaller than LEN does not
+ indicate there's no more to be read, only the end of the transfer.
+ E.g., when GDB reads memory from a traceframe, a first request may
+ be served from a memory block that does not cover the whole request
+ length. A following request gets the rest served from either
+ another block (of the same traceframe) or from the read-only
+ regions. */
+
+static int
+gdb_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
+{
+ int res;
+
+ if (current_traceframe >= 0)
+ {
+ ULONGEST nbytes;
+ ULONGEST length = len;
+
+ if (traceframe_read_mem (current_traceframe,
+ memaddr, myaddr, len, &nbytes))
+ return -1;
+ /* Data read from trace buffer, we're done. */
+ if (nbytes > 0)
+ return nbytes;
+ if (!in_readonly_region (memaddr, length))
+ return -1;
+ /* Otherwise we have a valid readonly case, fall through. */
+ /* (assume no half-trace half-real blocks for now) */
+ }
+
+ res = prepare_to_access_memory ();
+ if (res == 0)
+ {
+ if (set_desired_thread (1))
+ res = read_inferior_memory (memaddr, myaddr, len);
+ else
+ res = 1;
+ done_accessing_memory ();
+
+ return res == 0 ? len : -1;
+ }
+ else
+ return -1;
+}
+
+/* Write trace frame or inferior memory. Actually, writing to trace
+ frames is forbidden. */
+
+static int
+gdb_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
+{
+ if (current_traceframe >= 0)
+ return EIO;
+ else
+ {
+ int ret;
+
+ ret = prepare_to_access_memory ();
+ if (ret == 0)
+ {
+ if (set_desired_thread (1))
+ ret = write_inferior_memory (memaddr, myaddr, len);
+ else
+ ret = EIO;
+ done_accessing_memory ();
+ }
+ return ret;
+ }
+}
+
/* Subroutine of handle_search_memory to simplify it. */
static int
{
/* Prime the search buffer. */
- if (read_inferior_memory (start_addr, search_buf, search_buf_size) != 0)
+ if (gdb_read_memory (start_addr, search_buf, search_buf_size)
+ != search_buf_size)
{
- warning ("Unable to access target memory at 0x%lx, halting search.",
- (long) start_addr);
+ warning ("Unable to access %ld bytes of target "
+ "memory at 0x%lx, halting search.",
+ (long) search_buf_size, (long) start_addr);
return -1;
}
? search_space_len
: search_buf_size);
- found_ptr = memmem (search_buf, nr_search_bytes, pattern, pattern_len);
+ found_ptr = (gdb_byte *) memmem (search_buf, nr_search_bytes, pattern,
+ pattern_len);
if (found_ptr != NULL)
{
if (search_space_len >= pattern_len)
{
unsigned keep_len = search_buf_size - chunk_size;
- CORE_ADDR read_addr = start_addr + keep_len;
+ CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
int nr_to_read;
/* Copy the trailing part of the previous iteration to the front
? search_space_len - keep_len
: chunk_size);
- if (read_inferior_memory (read_addr, search_buf + keep_len,
- nr_to_read) != 0)
+ if (gdb_read_memory (read_addr, search_buf + keep_len,
+ nr_to_read) != search_buf_size)
{
- warning ("Unable to access target memory at 0x%lx, halting search.",
- (long) read_addr);
+ warning ("Unable to access %ld bytes of target memory "
+ "at 0x%lx, halting search.",
+ (long) nr_to_read, (long) read_addr);
return -1;
}
CORE_ADDR found_addr;
int cmd_name_len = sizeof ("qSearch:memory:") - 1;
- pattern = xmalloc (packet_len);
+ pattern = (gdb_byte *) malloc (packet_len);
if (pattern == NULL)
{
error ("Unable to allocate memory to perform the search");
if (search_space_len < search_buf_size)
search_buf_size = search_space_len;
- search_buf = xmalloc (search_buf_size);
+ search_buf = (gdb_byte *) malloc (search_buf_size);
if (search_buf == NULL)
{
free (pattern);
return; \
}
-/* Handle all of the extended 'q' packets. */
-void
-handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
+/* Parse options to --debug-format= and "monitor set debug-format".
+ ARG is the text after "--debug-format=" or "monitor set debug-format".
+ IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
+ This triggers calls to monitor_output.
+ The result is NULL if all options were parsed ok, otherwise an error
+ message which the caller must free.
+
+ N.B. These commands affect all debug format settings, they are not
+ cumulative. If a format is not specified, it is turned off.
+ However, we don't go to extra trouble with things like
+ "monitor set debug-format all,none,timestamp".
+ Instead we just parse them one at a time, in order.
+
+ The syntax for "monitor set debug" we support here is not identical
+ to gdb's "set debug foo on|off" because we also use this function to
+ parse "--debug-format=foo,bar". */
+
+static char *
+parse_debug_format_options (const char *arg, int is_monitor)
{
- static struct inferior_list_entry *thread_ptr;
+ VEC (char_ptr) *options;
+ int ix;
+ char *option;
- /* Reply the current thread id. */
- if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
- {
- require_running (own_buf);
- thread_ptr = all_threads.head;
- sprintf (own_buf, "QC%x",
- thread_to_gdb_id ((struct thread_info *)thread_ptr));
- return;
- }
+ /* First turn all debug format options off. */
+ debug_timestamp = 0;
- if (strcmp ("qSymbol::", own_buf) == 0)
- {
- if (target_running () && the_target->look_up_symbols != NULL)
- (*the_target->look_up_symbols) ();
+ /* First remove leading spaces, for "monitor set debug-format". */
+ while (isspace (*arg))
+ ++arg;
- strcpy (own_buf, "OK");
- return;
- }
+ options = delim_string_to_char_ptr_vec (arg, ',');
- if (!disable_packet_qfThreadInfo)
+ for (ix = 0; VEC_iterate (char_ptr, options, ix, option); ++ix)
{
- if (strcmp ("qfThreadInfo", own_buf) == 0)
+ if (strcmp (option, "all") == 0)
{
- require_running (own_buf);
- 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;
+ debug_timestamp = 1;
+ if (is_monitor)
+ monitor_output ("All extra debug format options enabled.\n");
}
-
- if (strcmp ("qsThreadInfo", own_buf) == 0)
+ else if (strcmp (option, "none") == 0)
{
- require_running (own_buf);
- 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;
- }
+ debug_timestamp = 0;
+ if (is_monitor)
+ monitor_output ("All extra debug format options disabled.\n");
+ }
+ else if (strcmp (option, "timestamp") == 0)
+ {
+ debug_timestamp = 1;
+ if (is_monitor)
+ monitor_output ("Timestamps will be added to debug output.\n");
+ }
+ else if (*option == '\0')
+ {
+ /* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
+ continue;
+ }
+ else
+ {
+ char *msg = xstrprintf ("Unknown debug-format argument: \"%s\"\n",
+ option);
+
+ free_char_ptr_vec (options);
+ return msg;
}
}
- if (the_target->read_offsets != NULL
- && strcmp ("qOffsets", own_buf) == 0)
- {
- CORE_ADDR text, data;
+ free_char_ptr_vec (options);
+ return NULL;
+}
- 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;
- }
+/* Handle monitor commands not handled by target-specific handlers. */
- if (the_target->qxfer_spu != NULL
- && strncmp ("qXfer:spu:read:", own_buf, 15) == 0)
+static void
+handle_monitor_command (char *mon, char *own_buf)
+{
+ if (strcmp (mon, "set debug 1") == 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 = xmalloc (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;
+ debug_threads = 1;
+ monitor_output ("Debug output enabled.\n");
}
-
- if (the_target->qxfer_spu != NULL
- && strncmp ("qXfer:spu:write:", own_buf, 16) == 0)
+ else if (strcmp (mon, "set debug 0") == 0)
{
- char *annex;
- int n;
- unsigned int len;
- CORE_ADDR ofs;
- unsigned char *spu_buf;
+ debug_threads = 0;
+ monitor_output ("Debug output disabled.\n");
+ }
+ else if (strcmp (mon, "set debug-hw-points 1") == 0)
+ {
+ show_debug_regs = 1;
+ monitor_output ("H/W point debugging output enabled.\n");
+ }
+ else if (strcmp (mon, "set debug-hw-points 0") == 0)
+ {
+ show_debug_regs = 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 (startswith (mon, "set debug-format "))
+ {
+ char *error_msg
+ = parse_debug_format_options (mon + sizeof ("set debug-format ") - 1,
+ 1);
- require_running (own_buf);
- strcpy (own_buf, "E00");
- spu_buf = xmalloc (packet_len - 15);
- if (!spu_buf)
- return;
- if (decode_xfer_write (own_buf + 16, packet_len - 16, &annex,
- &ofs, &len, spu_buf) < 0)
+ if (error_msg != NULL)
{
- free (spu_buf);
- return;
+ monitor_output (error_msg);
+ monitor_show_help ();
+ write_enn (own_buf);
+ xfree (error_msg);
}
-
- 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)
+ else if (strcmp (mon, "help") == 0)
+ monitor_show_help ();
+ else if (strcmp (mon, "exit") == 0)
+ exit_requested = 1;
+ else
{
- unsigned char *data;
- int n;
- CORE_ADDR ofs;
- unsigned int len;
- char *annex;
+ monitor_output ("Unknown monitor command.\n\n");
+ monitor_show_help ();
+ write_enn (own_buf);
+ }
+}
- require_running (own_buf);
+/* Associates a callback with each supported qXfer'able object. */
- /* 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;
- }
+struct qxfer
+{
+ /* The object this handler handles. */
+ const char *object;
- /* Read one extra byte, as an indicator of whether there is
- more. */
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
- data = xmalloc (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);
+ /* Request that the target transfer up to LEN 8-bit bytes of the
+ target's OBJECT. The OFFSET, for a seekable object, specifies
+ the starting point. The ANNEX can be used to provide additional
+ data-specific information to the target.
- free (data);
+ Return the number of bytes actually transfered, zero when no
+ further transfer is possible, -1 on error, -2 when the transfer
+ is not supported, and -3 on a verbose error message that should
+ be preserved. Return of a positive value smaller than LEN does
+ not indicate the end of the object, only the end of the transfer.
- return;
- }
+ One, and only one, of readbuf or writebuf must be non-NULL. */
+ int (*xfer) (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len);
+};
- if (strncmp ("qXfer:features:read:", own_buf, 20) == 0)
- {
- CORE_ADDR ofs;
- unsigned int len, total_len;
- const char *document;
- char *annex;
+/* Handle qXfer:auxv:read. */
- require_running (own_buf);
+static int
+handle_qxfer_auxv (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->read_auxv == NULL || writebuf != NULL)
+ return -2;
- /* Grab the annex, offset, and length. */
- if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0)
- {
- strcpy (own_buf, "E00");
- return;
- }
+ if (annex[0] != '\0' || current_thread == NULL)
+ return -1;
- /* Now grab the correct annex. */
- document = get_features_xml (annex);
- if (document == NULL)
- {
- strcpy (own_buf, "E00");
- return;
- }
+ return (*the_target->read_auxv) (offset, readbuf, len);
+}
- total_len = strlen (document);
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
+/* Handle qXfer:exec-file:read. */
- 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);
+static int
+handle_qxfer_exec_file (const char *const_annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ char *file;
+ ULONGEST pid;
+ int total_len;
- return;
- }
+ if (the_target->pid_to_exec_file == NULL || writebuf != NULL)
+ return -2;
- if (strncmp ("qXfer:libraries:read:", own_buf, 21) == 0)
+ if (const_annex[0] == '\0')
{
- CORE_ADDR ofs;
- unsigned int len, total_len;
- char *document, *p;
- struct inferior_list_entry *dll_ptr;
- char *annex;
+ if (current_thread == NULL)
+ return -1;
- require_running (own_buf);
+ pid = pid_of (current_thread);
+ }
+ else
+ {
+ char *annex = (char *) alloca (strlen (const_annex) + 1);
- /* 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;
- }
+ strcpy (annex, const_annex);
+ annex = unpack_varlen_hex (annex, &pid);
- /* 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);
+ if (annex[0] != '\0')
+ return -1;
+ }
- document = xmalloc (total_len);
- strcpy (document, "<library-list>\n");
- p = document + strlen (document);
+ if (pid <= 0)
+ return -1;
- 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;
+ file = (*the_target->pid_to_exec_file) (pid);
+ if (file == NULL)
+ return -1;
- 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);
- }
+ total_len = strlen (file);
- strcpy (p, "</library-list>\n");
+ if (offset > total_len)
+ return -1;
- total_len = strlen (document);
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
+ if (offset + len > total_len)
+ len = total_len - offset;
- 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);
+ memcpy (readbuf, file + offset, len);
+ return len;
+}
- free (document);
- return;
- }
+/* Handle qXfer:features:read. */
- 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;
+static int
+handle_qxfer_features (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ const char *document;
+ size_t total_len;
- strcpy (own_buf, "E00");
- if (decode_xfer_read (own_buf + 18, &annex, &ofs, &len) < 0)
- return;
- if (len > PBUFSIZ - 2)
- len = PBUFSIZ - 2;
- workbuf = xmalloc (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);
+ if (writebuf != NULL)
+ return -2;
- free (workbuf);
- return;
- }
+ if (!target_running ())
+ return -1;
- /* 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);
+ /* Grab the correct annex. */
+ document = get_features_xml (annex);
+ if (document == NULL)
+ return -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+");
+ total_len = strlen (document);
- if (the_target->read_auxv != NULL)
- strcat (own_buf, ";qXfer:auxv:read+");
+ if (offset > total_len)
+ return -1;
- if (the_target->qxfer_spu != NULL)
- strcat (own_buf, ";qXfer:spu:read+;qXfer:spu:write+");
+ if (offset + len > total_len)
+ len = total_len - offset;
- /* 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+");
+ memcpy (readbuf, document + offset, len);
+ return len;
+}
- if (transport_is_reliable)
- strcat (own_buf, ";QStartNoAckMode+");
+/* Worker routine for handle_qxfer_libraries.
+ Add to the length pointed to by ARG a conservative estimate of the
+ length needed to transmit the file name of INF. */
- if (the_target->qxfer_osdata != NULL)
- strcat (own_buf, ";qXfer:osdata:read+");
+static void
+accumulate_file_name_length (struct inferior_list_entry *inf, void *arg)
+{
+ struct dll_info *dll = (struct dll_info *) inf;
+ unsigned int *total_len = (unsigned int *) arg;
- return;
- }
+ /* Over-estimate the necessary memory. Assume that every character
+ in the library name must be escaped. */
+ *total_len += 128 + 6 * strlen (dll->name);
+}
- /* 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;
+/* Worker routine for handle_qxfer_libraries.
+ Emit the XML to describe the library in INF. */
- require_running (own_buf);
+static void
+emit_dll_description (struct inferior_list_entry *inf, void *arg)
+{
+ struct dll_info *dll = (struct dll_info *) inf;
+ char **p_ptr = (char **) arg;
+ char *p = *p_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);
+
+ *p_ptr = p;
+}
- for (i = 0; i < 3; i++)
- {
- char *p2;
- int len;
+/* Handle qXfer:libraries:read. */
- if (p == NULL)
- break;
+static int
+handle_qxfer_libraries (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ unsigned int total_len;
+ char *document, *p;
- p2 = strchr (p, ',');
- if (p2)
- {
- len = p2 - p;
- p2++;
- }
- else
- {
- len = strlen (p);
- p2 = NULL;
- }
+ if (writebuf != NULL)
+ return -2;
- decode_address (&parts[i], p, len);
- p = p2;
- }
+ if (annex[0] != '\0' || current_thread == NULL)
+ return -1;
- if (p != NULL || i < 3)
- err = 1;
- else
- {
- struct thread_info *thread = gdb_id_to_thread (parts[0]);
+ total_len = 64;
+ for_each_inferior_with_data (&all_dlls, accumulate_file_name_length,
+ &total_len);
- if (thread == NULL)
- err = 2;
- else
- err = the_target->get_tls_address (thread, parts[1], parts[2],
- &address);
- }
+ document = (char *) malloc (total_len);
+ if (document == NULL)
+ return -1;
- if (err == 0)
- {
- sprintf (own_buf, "%llx", address);
- return;
- }
- else if (err > 0)
- {
- write_enn (own_buf);
- return;
- }
+ strcpy (document, "<library-list version=\"1.0\">\n");
+ p = document + strlen (document);
- /* Otherwise, pretend we do not understand this packet. */
- }
+ for_each_inferior_with_data (&all_dlls, emit_dll_description, &p);
- /* Handle "monitor" commands. */
- if (strncmp ("qRcmd,", own_buf, 6) == 0)
+ strcpy (p, "</library-list>\n");
+
+ total_len = strlen (document);
+
+ if (offset > total_len)
{
- char *mon = xmalloc (PBUFSIZ);
- int len = strlen (own_buf + 6);
+ free (document);
+ return -1;
+ }
- if ((len % 2) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2)
- {
- write_enn (own_buf);
- free (mon);
- return;
- }
- mon[len / 2] = '\0';
+ if (offset + len > total_len)
+ len = total_len - offset;
- write_ok (own_buf);
+ memcpy (readbuf, document + offset, len);
+ free (document);
+ return len;
+}
- if (strcmp (mon, "set debug 1") == 0)
- {
- debug_threads = 1;
- monitor_output ("Debug output enabled.\n");
- }
- else if (strcmp (mon, "set debug 0") == 0)
- {
- debug_threads = 0;
- monitor_output ("Debug output disabled.\n");
- }
- else if (strcmp (mon, "set remote-debug 1") == 0)
- {
- remote_debug = 1;
- monitor_output ("Protocol debug output enabled.\n");
- }
- else if (strcmp (mon, "set remote-debug 0") == 0)
- {
- remote_debug = 0;
- monitor_output ("Protocol debug output disabled.\n");
- }
- else if (strcmp (mon, "help") == 0)
- monitor_show_help ();
- else if (strcmp (mon, "exit") == 0)
- exit_requested = 1;
- else
- {
- monitor_output ("Unknown monitor command.\n\n");
- monitor_show_help ();
- write_enn (own_buf);
- }
+/* Handle qXfer:libraries-svr4:read. */
- free (mon);
- return;
- }
+static int
+handle_qxfer_libraries_svr4 (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (writebuf != NULL)
+ return -2;
- if (strncmp ("qSearch:memory:", own_buf, sizeof ("qSearch:memory:") - 1) == 0)
- {
- require_running (own_buf);
- handle_search_memory (own_buf, packet_len);
- return;
- }
+ if (current_thread == NULL || the_target->qxfer_libraries_svr4 == NULL)
+ return -1;
- /* Otherwise we didn't know what packet it was. Say we didn't
- understand it. */
- own_buf[0] = 0;
+ return the_target->qxfer_libraries_svr4 (annex, readbuf, writebuf, offset, len);
}
-/* Parse vCont packets. */
-void
-handle_v_cont (char *own_buf, char *status, int *signal)
+/* Handle qXfer:osadata:read. */
+
+static int
+handle_qxfer_osdata (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
{
- char *p, *q;
- int n = 0, i = 0;
- struct thread_resume *resume_info, default_action;
+ if (the_target->qxfer_osdata == NULL || writebuf != NULL)
+ return -2;
- /* 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 = xmalloc ((n + 1) * sizeof (resume_info[0]));
+ return (*the_target->qxfer_osdata) (annex, readbuf, NULL, offset, len);
+}
- default_action.thread = -1;
- default_action.leave_stopped = 1;
- default_action.step = 0;
- default_action.sig = 0;
+/* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
- p = &own_buf[5];
- i = 0;
- while (*p)
- {
- p++;
+static int
+handle_qxfer_siginfo (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_siginfo == NULL)
+ return -2;
- resume_info[i].leave_stopped = 0;
+ if (annex[0] != '\0' || current_thread == NULL)
+ return -1;
- 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;
+ return (*the_target->qxfer_siginfo) (annex, readbuf, writebuf, offset, len);
+}
- if (p[0] == 'S' || p[0] == 'C')
- {
- int sig;
- sig = strtol (p + 1, &q, 16);
- if (p == q)
- goto err;
- p = q;
+/* Handle qXfer:spu:read and qXfer:spu:write. */
- 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;
- }
+static int
+handle_qxfer_spu (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_spu == NULL)
+ return -2;
- if (p[0] == 0)
- {
- resume_info[i].thread = -1;
- default_action = resume_info[i];
+ if (current_thread == NULL)
+ return -1;
- /* 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;
+ return (*the_target->qxfer_spu) (annex, readbuf, writebuf, offset, len);
+}
- if (p == q)
- goto err;
- p = q;
- if (p[0] != ';' && p[0] != 0)
- goto err;
+/* Handle qXfer:statictrace:read. */
- thread_id = gdb_id_to_thread_id (gdb_id);
- if (thread_id)
- resume_info[i].thread = thread_id;
- else
- goto err;
+static int
+handle_qxfer_statictrace (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ ULONGEST nbytes;
- i++;
- }
+ if (writebuf != NULL)
+ return -2;
+
+ if (annex[0] != '\0' || current_thread == NULL || current_traceframe == -1)
+ return -1;
+
+ if (traceframe_read_sdata (current_traceframe, offset,
+ readbuf, len, &nbytes))
+ return -1;
+ return nbytes;
+}
+
+/* Helper for handle_qxfer_threads_proper.
+ Emit the XML to describe the thread of INF. */
+
+static void
+handle_qxfer_threads_worker (struct inferior_list_entry *inf, void *arg)
+{
+ struct thread_info *thread = (struct thread_info *) inf;
+ struct buffer *buffer = (struct buffer *) arg;
+ ptid_t ptid = thread_to_gdb_id (thread);
+ char ptid_s[100];
+ int core = target_core_of_thread (ptid);
+ char core_s[21];
+ const char *name = target_thread_name (ptid);
+
+ write_ptid (ptid_s, ptid);
+
+ buffer_xml_printf (buffer, "<thread id=\"%s\"", ptid_s);
+
+ if (core != -1)
+ {
+ sprintf (core_s, "%d", core);
+ buffer_xml_printf (buffer, " core=\"%s\"", core_s);
}
- resume_info[i] = default_action;
+ if (name != NULL)
+ buffer_xml_printf (buffer, " name=\"%s\"", name);
- /* 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);
+ buffer_xml_printf (buffer, "/>\n");
+}
- enable_async_io ();
- (*the_target->resume) (resume_info);
+/* Helper for handle_qxfer_threads. */
- free (resume_info);
+static void
+handle_qxfer_threads_proper (struct buffer *buffer)
+{
+ buffer_grow_str (buffer, "<threads>\n");
- *signal = mywait (status, 1);
- prepare_resume_reply (own_buf, *status, *signal);
- disable_async_io ();
- return;
+ for_each_inferior_with_data (&all_threads, handle_qxfer_threads_worker,
+ buffer);
-err:
- write_enn (own_buf);
- free (resume_info);
- return;
+ buffer_grow_str0 (buffer, "</threads>\n");
}
-/* Attach to a new program. Return 1 if successful, 0 if failure. */
-int
-handle_v_attach (char *own_buf, char *status, int *signal)
+/* Handle qXfer:threads:read. */
+
+static int
+handle_qxfer_threads (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
{
- int pid;
+ static char *result = 0;
+ static unsigned int result_length = 0;
- pid = strtol (own_buf + 8, NULL, 16);
- if (pid != 0 && attach_inferior (pid, status, signal) == 0)
+ if (writebuf != NULL)
+ return -2;
+
+ if (annex[0] != '\0')
+ return -1;
+
+ if (offset == 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;
- prepare_resume_reply (own_buf, *status, *signal);
- return 1;
+ 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);
+
+ buffer_init (&buffer);
+
+ handle_qxfer_threads_proper (&buffer);
+
+ result = buffer_finish (&buffer);
+ result_length = strlen (result);
+ buffer_free (&buffer);
}
- else
+
+ if (offset >= result_length)
{
- write_enn (own_buf);
+ /* We're out of data. */
+ free (result);
+ result = NULL;
+ result_length = 0;
return 0;
}
+
+ if (len > result_length - offset)
+ len = result_length - offset;
+
+ memcpy (readbuf, result + offset, len);
+
+ return len;
}
-/* Run a new program. Return 1 if successful, 0 if failure. */
+/* Handle qXfer:traceframe-info:read. */
+
static int
-handle_v_run (char *own_buf, char *status, int *signal)
+handle_qxfer_traceframe_info (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
{
- char *p, **pp, *next_p, **new_argv;
- int i, new_argc;
+ static char *result = 0;
+ static unsigned int result_length = 0;
- new_argc = 0;
- for (p = own_buf + strlen ("vRun;"); p && *p; p = strchr (p, ';'))
+ if (writebuf != NULL)
+ return -2;
+
+ if (!target_running () || annex[0] != '\0' || current_traceframe == -1)
+ return -1;
+
+ if (offset == 0)
{
- p++;
- new_argc++;
+ struct buffer buffer;
+
+ /* When asked for data at offset 0, generate everything and
+ store into 'result'. Successive reads will be served off
+ 'result'. */
+ free (result);
+
+ buffer_init (&buffer);
+
+ traceframe_read_info (current_traceframe, &buffer);
+
+ result = buffer_finish (&buffer);
+ result_length = strlen (result);
+ buffer_free (&buffer);
}
- new_argv = xcalloc (new_argc + 2, sizeof (char *));
- i = 0;
- for (p = own_buf + strlen ("vRun;"); *p; p = next_p)
+ if (offset >= result_length)
{
- next_p = strchr (p, ';');
- if (next_p == NULL)
- next_p = p + strlen (p);
+ /* We're out of data. */
+ free (result);
+ result = NULL;
+ result_length = 0;
+ return 0;
+ }
- if (i == 0 && p == next_p)
- new_argv[i] = NULL;
- else
- {
- 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 (len > result_length - offset)
+ len = result_length - offset;
- if (*next_p)
- next_p++;
- i++;
- }
- new_argv[i] = NULL;
+ memcpy (readbuf, result + offset, len);
+ return len;
+}
- 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. */
+/* Handle qXfer:fdpic:read. */
- if (program_argv == NULL)
- {
- write_enn (own_buf);
- return 0;
- }
+static int
+handle_qxfer_fdpic (const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
+{
+ if (the_target->read_loadmap == NULL)
+ return -2;
+
+ if (current_thread == NULL)
+ return -1;
+
+ return (*the_target->read_loadmap) (annex, offset, readbuf, len);
+}
- new_argv[0] = xstrdup (program_argv[0]);
+/* Handle qXfer:btrace:read. */
+
+static int
+handle_qxfer_btrace (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ static struct buffer cache;
+ struct thread_info *thread;
+ enum btrace_read_type type;
+ int result;
+
+ if (the_target->read_btrace == NULL || writebuf != NULL)
+ return -2;
+
+ if (ptid_equal (general_thread, null_ptid)
+ || ptid_equal (general_thread, minus_one_ptid))
+ {
+ strcpy (own_buf, "E.Must select a single thread.");
+ return -3;
}
- /* Free the old argv. */
- if (program_argv)
+ thread = find_thread_ptid (general_thread);
+ if (thread == NULL)
{
- for (pp = program_argv; *pp != NULL; pp++)
- free (*pp);
- free (program_argv);
+ strcpy (own_buf, "E.No such thread.");
+ return -3;
}
- program_argv = new_argv;
- *signal = start_inferior (program_argv, status);
- if (*status == 'T')
+ if (thread->btrace == NULL)
{
- prepare_resume_reply (own_buf, *status, *signal);
- return 1;
+ strcpy (own_buf, "E.Btrace not enabled.");
+ return -3;
}
+
+ if (strcmp (annex, "all") == 0)
+ type = BTRACE_READ_ALL;
+ else if (strcmp (annex, "new") == 0)
+ type = BTRACE_READ_NEW;
+ else if (strcmp (annex, "delta") == 0)
+ type = BTRACE_READ_DELTA;
else
{
- write_enn (own_buf);
- return 0;
+ strcpy (own_buf, "E.Bad annex.");
+ return -3;
}
-}
-/* Handle all of the extended 'v' packets. */
-void
-handle_v_requests (char *own_buf, char *status, int *signal,
- int packet_len, int *new_packet_len)
-{
- if (!disable_packet_vCont)
+ if (offset == 0)
{
- if (strncmp (own_buf, "vCont;", 6) == 0)
- {
- require_running (own_buf);
- handle_v_cont (own_buf, status, signal);
- return;
- }
+ buffer_free (&cache);
- if (strncmp (own_buf, "vCont?", 6) == 0)
+ result = target_read_btrace (thread->btrace, &cache, type);
+ if (result != 0)
{
- strcpy (own_buf, "vCont;c;C;s;S");
- return;
+ memcpy (own_buf, cache.buffer, cache.used_size);
+ return -3;
}
}
+ else if (offset > cache.used_size)
+ {
+ buffer_free (&cache);
+ return -3;
+ }
- if (strncmp (own_buf, "vFile:", 6) == 0
- && handle_vFile (own_buf, packet_len, new_packet_len))
- return;
+ if (len > cache.used_size - offset)
+ len = cache.used_size - offset;
+
+ memcpy (readbuf, cache.buffer + offset, len);
+
+ return len;
+}
+
+/* Handle qXfer:btrace-conf:read. */
+
+static int
+handle_qxfer_btrace_conf (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ static struct buffer cache;
+ struct thread_info *thread;
+ int result;
- if (strncmp (own_buf, "vAttach;", 8) == 0)
+ if (the_target->read_btrace_conf == NULL || writebuf != NULL)
+ return -2;
+
+ if (annex[0] != '\0')
+ return -1;
+
+ if (ptid_equal (general_thread, null_ptid)
+ || ptid_equal (general_thread, minus_one_ptid))
{
- if (target_running ())
- {
- fprintf (stderr, "Already debugging a process\n");
- write_enn (own_buf);
- return;
- }
- handle_v_attach (own_buf, status, signal);
- return;
+ strcpy (own_buf, "E.Must select a single thread.");
+ return -3;
+ }
+
+ thread = find_thread_ptid (general_thread);
+ if (thread == NULL)
+ {
+ strcpy (own_buf, "E.No such thread.");
+ return -3;
}
- if (strncmp (own_buf, "vRun;", 5) == 0)
+ if (thread->btrace == NULL)
{
- if (target_running ())
+ strcpy (own_buf, "E.Btrace not enabled.");
+ return -3;
+ }
+
+ if (offset == 0)
+ {
+ buffer_free (&cache);
+
+ result = target_read_btrace_conf (thread->btrace, &cache);
+ if (result != 0)
{
- fprintf (stderr, "Already debugging a process\n");
- write_enn (own_buf);
- return;
+ memcpy (own_buf, cache.buffer, cache.used_size);
+ return -3;
}
- handle_v_run (own_buf, status, signal);
- return;
+ }
+ else if (offset > cache.used_size)
+ {
+ buffer_free (&cache);
+ return -3;
}
- /* Otherwise we didn't know what packet it was. Say we didn't
- understand it. */
- own_buf[0] = 0;
- return;
+ if (len > cache.used_size - offset)
+ len = cache.used_size - offset;
+
+ memcpy (readbuf, cache.buffer + offset, len);
+
+ return len;
}
-void
-myresume (char *own_buf, int step, int *signalp, char *statusp)
+static const struct qxfer qxfer_packets[] =
+ {
+ { "auxv", handle_qxfer_auxv },
+ { "btrace", handle_qxfer_btrace },
+ { "btrace-conf", handle_qxfer_btrace_conf },
+ { "exec-file", handle_qxfer_exec_file},
+ { "fdpic", handle_qxfer_fdpic},
+ { "features", handle_qxfer_features },
+ { "libraries", handle_qxfer_libraries },
+ { "libraries-svr4", handle_qxfer_libraries_svr4 },
+ { "osdata", handle_qxfer_osdata },
+ { "siginfo", handle_qxfer_siginfo },
+ { "spu", handle_qxfer_spu },
+ { "statictrace", handle_qxfer_statictrace },
+ { "threads", handle_qxfer_threads },
+ { "traceframe-info", handle_qxfer_traceframe_info },
+ };
+
+static int
+handle_qxfer (char *own_buf, int packet_len, int *new_packet_len_p)
{
- struct thread_resume resume_info[2];
- int n = 0;
- int sig = *signalp;
+ int i;
+ char *object;
+ char *rw;
+ char *annex;
+ char *offset;
- set_desired_inferior (0);
+ if (!startswith (own_buf, "qXfer:"))
+ return 0;
- if (step || sig || (cont_thread != 0 && cont_thread != -1))
+ /* Grab the object, r/w and annex. */
+ if (decode_xfer (own_buf + 6, &object, &rw, &annex, &offset) < 0)
{
- 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++;
+ write_enn (own_buf);
+ return 1;
}
- resume_info[n].thread = -1;
- resume_info[n].step = 0;
- resume_info[n].sig = 0;
- resume_info[n].leave_stopped = (cont_thread != 0 && cont_thread != -1);
- enable_async_io ();
- (*the_target->resume) (resume_info);
- *signalp = mywait (statusp, 1);
- prepare_resume_reply (own_buf, *statusp, *signalp);
- disable_async_io ();
-}
+ for (i = 0;
+ i < sizeof (qxfer_packets) / sizeof (qxfer_packets[0]);
+ i++)
+ {
+ const struct qxfer *q = &qxfer_packets[i];
-static void
-gdbserver_version (void)
-{
- printf ("GNU gdbserver %s%s\n"
- "Copyright (C) 2007 Free Software Foundation, Inc.\n"
- "gdbserver is free software, covered by the GNU General Public License.\n"
- "This gdbserver was configured as \"%s\"\n",
- PKGVERSION, version, host_name);
+ if (strcmp (object, q->object) == 0)
+ {
+ if (strcmp (rw, "read") == 0)
+ {
+ unsigned char *data;
+ int n;
+ CORE_ADDR ofs;
+ unsigned int len;
+
+ /* Grab the offset and length. */
+ if (decode_xfer_read (offset, &ofs, &len) < 0)
+ {
+ write_enn (own_buf);
+ return 1;
+ }
+
+ /* Read one extra byte, as an indicator of whether there is
+ more. */
+ if (len > PBUFSIZ - 2)
+ len = PBUFSIZ - 2;
+ data = (unsigned char *) malloc (len + 1);
+ if (data == NULL)
+ {
+ write_enn (own_buf);
+ return 1;
+ }
+ n = (*q->xfer) (annex, data, NULL, ofs, len + 1);
+ if (n == -2)
+ {
+ free (data);
+ return 0;
+ }
+ else if (n == -3)
+ {
+ /* Preserve error message. */
+ }
+ else 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 1;
+ }
+ else if (strcmp (rw, "write") == 0)
+ {
+ int n;
+ unsigned int len;
+ CORE_ADDR ofs;
+ unsigned char *data;
+
+ strcpy (own_buf, "E00");
+ data = (unsigned char *) malloc (packet_len - (offset - own_buf));
+ if (data == NULL)
+ {
+ write_enn (own_buf);
+ return 1;
+ }
+ if (decode_xfer_write (offset, packet_len - (offset - own_buf),
+ &ofs, &len, data) < 0)
+ {
+ free (data);
+ write_enn (own_buf);
+ return 1;
+ }
+
+ n = (*q->xfer) (annex, NULL, data, ofs, len);
+ if (n == -2)
+ {
+ free (data);
+ return 0;
+ }
+ else if (n == -3)
+ {
+ /* Preserve error message. */
+ }
+ else if (n < 0)
+ write_enn (own_buf);
+ else
+ sprintf (own_buf, "%x", n);
+
+ free (data);
+ return 1;
+ }
+
+ return 0;
+ }
+ }
+
+ return 0;
}
-static void
-gdbserver_usage (FILE *stream)
+/* Compute 32 bit CRC from inferior memory.
+
+ On success, return 32 bit CRC.
+ On failure, return (unsigned long long) -1. */
+
+static unsigned long long
+crc32 (CORE_ADDR base, int len, unsigned int crc)
{
- 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\t\tEnable debugging output.\n"
- " --version\t\tDisplay version information and exit.\n"
- " --wrapper WRAPPER --\tRun WRAPPER to start new programs.\n");
- if (REPORT_BUGS_TO[0] && stream == stdout)
- fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
+ while (len--)
+ {
+ unsigned char byte = 0;
+
+ /* Return failure if memory read fails. */
+ if (read_inferior_memory (base, &byte, 1) != 0)
+ return (unsigned long long) -1;
+
+ crc = xcrc32 (&byte, 1, crc);
+ base++;
+ }
+ return (unsigned long long) crc;
}
+/* Add supported btrace packets to BUF. */
+
static void
-gdbserver_show_disableable (FILE *stream)
+supported_btrace_packets (char *buf)
{
- 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");
-}
+ int btrace_supported = 0;
+ if (target_supports_btrace (BTRACE_FORMAT_BTS))
+ {
+ strcat (buf, ";Qbtrace:bts+");
+ strcat (buf, ";Qbtrace-conf:bts:size+");
-#undef require_running
-#define require_running(BUF) \
- if (!target_running ()) \
- { \
- write_enn (BUF); \
- break; \
+ btrace_supported = 1;
}
-int
-main (int argc, char *argv[])
+ if (target_supports_btrace (BTRACE_FORMAT_PT))
+ {
+ strcat (buf, ";Qbtrace:pt+");
+ strcat (buf, ";Qbtrace-conf:pt:size+");
+
+ btrace_supported = 1;
+ }
+
+ if (!btrace_supported)
+ return;
+
+ strcat (buf, ";Qbtrace:off+");
+ strcat (buf, ";qXfer:btrace:read+");
+ strcat (buf, ";qXfer:btrace-conf:read+");
+}
+
+/* Handle all of the extended 'q' packets. */
+
+static void
+handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
{
- 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, *port;
- char **next_arg = &argv[1];
- int multi_mode = 0;
- int attach = 0;
- int was_running;
+ static struct inferior_list_entry *thread_ptr;
- while (*next_arg != NULL && **next_arg == '-')
+ /* Reply the current thread id. */
+ if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
{
- if (strcmp (*next_arg, "--version") == 0)
- {
- gdbserver_version ();
- exit (0);
- }
- else if (strcmp (*next_arg, "--help") == 0)
+ ptid_t gdb_id;
+ require_running (own_buf);
+
+ if (!ptid_equal (general_thread, null_ptid)
+ && !ptid_equal (general_thread, minus_one_ptid))
+ gdb_id = general_thread;
+ else
{
- gdbserver_usage (stdout);
- exit (0);
+ thread_ptr = get_first_inferior (&all_threads);
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
}
- 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++;
+ sprintf (own_buf, "QC");
+ own_buf += 2;
+ write_ptid (own_buf, gdb_id);
+ return;
+ }
- if (next_arg == wrapper_argv || *next_arg == NULL)
+ if (strcmp ("qSymbol::", own_buf) == 0)
+ {
+ struct thread_info *save_thread = current_thread;
+
+ /* For qSymbol, GDB only changes the current thread if the
+ previous current thread was of a different process. So if
+ the previous thread is gone, we need to pick another one of
+ the same process. This can happen e.g., if we followed an
+ exec in a non-leader thread. */
+ if (current_thread == NULL)
+ {
+ current_thread
+ = find_any_thread_of_pid (ptid_get_pid (general_thread));
+
+ /* Just in case, if we didn't find a thread, then bail out
+ instead of crashing. */
+ if (current_thread == NULL)
{
- gdbserver_usage (stderr);
- exit (1);
+ write_enn (own_buf);
+ current_thread = save_thread;
+ return;
}
-
- /* Consume the "--". */
- *next_arg = NULL;
- }
- else if (strcmp (*next_arg, "--debug") == 0)
- debug_threads = 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, ","))
+ /* 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 (current_thread != NULL && the_target->look_up_symbols != NULL)
+ (*the_target->look_up_symbols) ();
+
+ current_thread = save_thread;
+
+ strcpy (own_buf, "OK");
+ return;
+ }
+
+ if (!disable_packet_qfThreadInfo)
+ {
+ if (strcmp ("qfThreadInfo", own_buf) == 0)
+ {
+ ptid_t gdb_id;
+
+ require_running (own_buf);
+ thread_ptr = get_first_inferior (&all_threads);
+
+ *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;
+ }
+
+ if (strcmp ("qsThreadInfo", own_buf) == 0)
+ {
+ 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 (the_target->read_offsets != NULL
+ && strcmp ("qOffsets", own_buf) == 0)
+ {
+ 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;
+ }
+
+ /* Protocol features query. */
+ if (startswith (own_buf, "qSupported")
+ && (own_buf[10] == ':' || own_buf[10] == '\0'))
+ {
+ char *p = &own_buf[10];
+ int gdb_supports_qRelocInsn = 0;
+
+ /* 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 unknown = 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 = XRESIZEVEC (char *, qsupported, count);
+ 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 if (strcmp (p, "swbreak+") == 0)
+ {
+ /* GDB wants us to report whether a trap is caused
+ by a software breakpoint and for us to handle PC
+ adjustment if necessary on this target. */
+ if (target_supports_stopped_by_sw_breakpoint ())
+ swbreak_feature = 1;
+ }
+ else if (strcmp (p, "hwbreak+") == 0)
+ {
+ /* GDB wants us to report whether a trap is caused
+ by a hardware breakpoint. */
+ if (target_supports_stopped_by_hw_breakpoint ())
+ hwbreak_feature = 1;
+ }
+ else if (strcmp (p, "fork-events+") == 0)
+ {
+ /* GDB supports and wants fork events if possible. */
+ if (target_supports_fork_events ())
+ report_fork_events = 1;
+ }
+ else if (strcmp (p, "vfork-events+") == 0)
+ {
+ /* GDB supports and wants vfork events if possible. */
+ if (target_supports_vfork_events ())
+ report_vfork_events = 1;
+ }
+ else if (strcmp (p, "exec-events+") == 0)
+ {
+ /* GDB supports and wants exec events if possible. */
+ if (target_supports_exec_events ())
+ report_exec_events = 1;
+ }
+ else if (strcmp (p, "vContSupported+") == 0)
+ vCont_supported = 1;
+ else if (strcmp (p, "QThreadEvents+") == 0)
+ ;
+ else if (strcmp (p, "no-resumed+") == 0)
+ {
+ /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
+ events. */
+ report_no_resumed = 1;
+ }
+ else
+ {
+ /* Move the unknown features all together. */
+ qsupported[i] = NULL;
+ qsupported[unknown] = p;
+ unknown++;
+ }
+ }
+
+ /* Give the target backend a chance to process the unknown
+ features. */
+ target_process_qsupported (qsupported, unknown);
+
+ for (i = 0; i < count; i++)
+ free (qsupported[i]);
+ free (qsupported);
+ }
+
+ sprintf (own_buf,
+ "PacketSize=%x;QPassSignals+;QProgramSignals+",
+ PBUFSIZ - 1);
+
+ if (target_supports_catch_syscall ())
+ strcat (own_buf, ";QCatchSyscalls+");
+
+ if (the_target->qxfer_libraries_svr4 != NULL)
+ strcat (own_buf, ";qXfer:libraries-svr4:read+"
+ ";augmented-libraries-svr4-read+");
+ else
+ {
+ /* We do not have any hook to indicate whether the non-SVR4 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+");
+
+ if (the_target->read_loadmap != NULL)
+ strcat (own_buf, ";qXfer:fdpic:read+");
+
+ /* 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_fork_events ())
+ strcat (own_buf, ";fork-events+");
+
+ if (target_supports_vfork_events ())
+ strcat (own_buf, ";vfork-events+");
+
+ if (target_supports_exec_events ())
+ strcat (own_buf, ";exec-events+");
+
+ if (target_supports_non_stop ())
+ strcat (own_buf, ";QNonStop+");
+
+ if (target_supports_disable_randomization ())
+ strcat (own_buf, ";QDisableRandomization+");
+
+ 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, ";InstallInTrace+");
+ strcat (own_buf, ";qXfer:statictrace:read+");
+ strcat (own_buf, ";qXfer:traceframe-info:read+");
+ strcat (own_buf, ";EnableDisableTracepoints+");
+ strcat (own_buf, ";QTBuffer:size+");
+ strcat (own_buf, ";tracenz+");
+ }
+
+ if (target_supports_hardware_single_step ()
+ || target_supports_software_single_step () )
+ {
+ strcat (own_buf, ";ConditionalBreakpoints+");
+ }
+ strcat (own_buf, ";BreakpointCommands+");
+
+ if (target_supports_agent ())
+ strcat (own_buf, ";QAgent+");
+
+ supported_btrace_packets (own_buf);
+
+ if (target_supports_stopped_by_sw_breakpoint ())
+ strcat (own_buf, ";swbreak+");
+
+ if (target_supports_stopped_by_hw_breakpoint ())
+ strcat (own_buf, ";hwbreak+");
+
+ if (the_target->pid_to_exec_file != NULL)
+ strcat (own_buf, ";qXfer:exec-file:read+");
+
+ strcat (own_buf, ";vContSupported+");
+
+ strcat (own_buf, ";QThreadEvents+");
+
+ strcat (own_buf, ";no-resumed+");
+
+ /* Reinitialize components as needed for the new connection. */
+ hostio_handle_new_gdb_connection ();
+ target_handle_new_gdb_connection ();
+
+ return;
+ }
+
+ /* Thread-local storage support. */
+ if (the_target->get_tls_address != NULL
+ && startswith (own_buf, "qGetTLSAddr:"))
+ {
+ 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)
+ {
+ strcpy (own_buf, paddress(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
+ && startswith (own_buf, "qGetTIBAddr:"))
+ {
+ 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)
+ {
+ strcpy (own_buf, paddress(tlb));
+ return;
+ }
+ else if (n == 0)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ return;
+ }
+
+ /* Handle "monitor" commands. */
+ if (startswith (own_buf, "qRcmd,"))
+ {
+ char *mon = (char *) malloc (PBUFSIZ);
+ int len = strlen (own_buf + 6);
+
+ if (mon == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
+
+ if ((len % 2) != 0
+ || hex2bin (own_buf + 6, (gdb_byte *) mon, 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, own_buf);
+
+ free (mon);
+ return;
+ }
+
+ if (startswith (own_buf, "qSearch:memory:"))
+ {
+ require_running (own_buf);
+ handle_search_memory (own_buf, packet_len);
+ return;
+ }
+
+ if (strcmp (own_buf, "qAttached") == 0
+ || startswith (own_buf, "qAttached:"))
+ {
+ 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 (startswith (own_buf, "qCRC:"))
+ {
+ /* CRC check (compare-section). */
+ char *comma;
+ ULONGEST base;
+ int len;
+ unsigned long long crc;
+
+ require_running (own_buf);
+ comma = unpack_varlen_hex (own_buf + 5, &base);
+ 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 (handle_qxfer (own_buf, packet_len, new_packet_len_p))
+ 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;
+}
+
+static void gdb_wants_all_threads_stopped (void);
+static void resume (struct thread_resume *actions, size_t n);
+
+/* The callback that is passed to visit_actioned_threads. */
+typedef int (visit_actioned_threads_callback_ftype)
+ (const struct thread_resume *, struct thread_info *);
+
+/* Struct to pass data to visit_actioned_threads. */
+
+struct visit_actioned_threads_data
+{
+ const struct thread_resume *actions;
+ size_t num_actions;
+ visit_actioned_threads_callback_ftype *callback;
+};
+
+/* Call CALLBACK for any thread to which ACTIONS applies to. Returns
+ true if CALLBACK returns true. Returns false if no matching thread
+ is found or CALLBACK results false.
+ Note: This function is itself a callback for find_inferior. */
+
+static int
+visit_actioned_threads (struct inferior_list_entry *entry, void *datap)
+{
+ struct visit_actioned_threads_data *data
+ = (struct visit_actioned_threads_data *) datap;
+ const struct thread_resume *actions = data->actions;
+ size_t num_actions = data->num_actions;
+ visit_actioned_threads_callback_ftype *callback = data->callback;
+ size_t i;
+
+ for (i = 0; i < num_actions; i++)
+ {
+ const struct thread_resume *action = &actions[i];
+
+ if (ptid_equal (action->thread, minus_one_ptid)
+ || ptid_equal (action->thread, entry->id)
+ || ((ptid_get_pid (action->thread)
+ == ptid_get_pid (entry->id))
+ && ptid_get_lwp (action->thread) == -1))
+ {
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ if ((*callback) (action, thread))
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+/* Callback for visit_actioned_threads. If the thread has a pending
+ status to report, report it now. */
+
+static int
+handle_pending_status (const struct thread_resume *resumption,
+ struct thread_info *thread)
+{
+ if (thread->status_pending_p)
+ {
+ thread->status_pending_p = 0;
+
+ last_status = thread->last_status;
+ last_ptid = thread->entry.id;
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ return 1;
+ }
+ return 0;
+}
+
+/* Parse vCont packets. */
+static 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 = (struct thread_resume *) malloc (n * sizeof (resume_info[0]));
+ if (resume_info == NULL)
+ goto err;
+
+ p = &own_buf[5];
+ while (*p)
+ {
+ p++;
+
+ memset (&resume_info[i], 0, sizeof resume_info[i]);
+
+ if (p[0] == 's' || p[0] == 'S')
+ resume_info[i].kind = resume_step;
+ else if (p[0] == 'r')
+ 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 (!gdb_signal_to_host_p ((enum gdb_signal) sig))
+ goto err;
+ resume_info[i].sig = gdb_signal_to_host ((enum gdb_signal) sig);
+ }
+ else if (p[0] == 'r')
+ {
+ ULONGEST addr;
+
+ p = unpack_varlen_hex (p + 1, &addr);
+ resume_info[i].step_range_start = addr;
+
+ if (*p != ',')
+ goto err;
+
+ p = unpack_varlen_hex (p + 1, &addr);
+ resume_info[i].step_range_end = addr;
+ }
+ else
+ {
+ 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;
+
+ resume (resume_info, n);
+ free (resume_info);
+ return;
+
+err:
+ write_enn (own_buf);
+ free (resume_info);
+ return;
+}
+
+/* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
+
+static void
+resume (struct thread_resume *actions, size_t num_actions)
+{
+ if (!non_stop)
+ {
+ /* Check if among the threads that GDB wants actioned, there's
+ one with a pending status to report. If so, skip actually
+ resuming/stopping and report the pending event
+ immediately. */
+ struct visit_actioned_threads_data data;
+
+ data.actions = actions;
+ data.num_actions = num_actions;
+ data.callback = handle_pending_status;
+ if (find_inferior (&all_threads, visit_actioned_threads, &data) != NULL)
+ return;
+
+ enable_async_io ();
+ }
+
+ (*the_target->resume) (actions, num_actions);
+
+ if (non_stop)
+ write_ok (own_buf);
+ else
+ {
+ last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
+
+ if (last_status.kind == TARGET_WAITKIND_NO_RESUMED
+ && !report_no_resumed)
+ {
+ /* The client does not support this stop reply. At least
+ return error. */
+ sprintf (own_buf, "E.No unwaited-for children left.");
+ disable_async_io ();
+ return;
+ }
+
+ if (last_status.kind != TARGET_WAITKIND_EXITED
+ && last_status.kind != TARGET_WAITKIND_SIGNALLED
+ && last_status.kind != TARGET_WAITKIND_NO_RESUMED)
+ current_thread->last_status = last_status;
+
+ /* From the client's perspective, all-stop mode always stops all
+ threads implicitly (and the target backend has already done
+ so by now). Tag all threads as "want-stopped", so we don't
+ resume them implicitly without the client telling us to. */
+ gdb_wants_all_threads_stopped ();
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ disable_async_io ();
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ mourn_inferior (find_process_pid (ptid_get_pid (last_ptid)));
+ }
+}
+
+/* Attach to a new program. Return 1 if successful, 0 if failure. */
+static 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 = (char **) 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] = (char *) xmalloc (1 + (next_p - p) / 2);
+ hex2bin (p, (gdb_byte *) new_argv[i], (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)
+ {
+ write_enn (own_buf);
+ freeargv (new_argv);
+ return 0;
+ }
+
+ new_argv[0] = strdup (program_argv[0]);
+ if (new_argv[0] == NULL)
+ {
+ write_enn (own_buf);
+ freeargv (new_argv);
+ 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. */
+static 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 = GDB_SIGNAL_KILL;
+ last_ptid = pid_to_ptid (pid);
+ discard_queued_stop_replies (last_ptid);
+ write_ok (own_buf);
+ return 1;
+ }
+ else
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+}
+
+/* Handle all of the extended 'v' packets. */
+static void
+handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
+{
+ if (!disable_packet_vCont)
+ {
+ if (strcmp (own_buf, "vCtrlC") == 0)
+ {
+ (*the_target->request_interrupt) ();
+ write_ok (own_buf);
+ return;
+ }
+
+ if (startswith (own_buf, "vCont;"))
+ {
+ require_running (own_buf);
+ handle_v_cont (own_buf);
+ return;
+ }
+
+ if (startswith (own_buf, "vCont?"))
+ {
+ strcpy (own_buf, "vCont;c;C;t");
+
+ if (target_supports_hardware_single_step () || !vCont_supported)
+ {
+ /* If target supports hardware single step, add actions s
+ and S to the list of supported actions. On the other
+ hand, if GDB doesn't request the supported vCont actions
+ in qSupported packet, add s and S to the list too. */
+ own_buf = own_buf + strlen (own_buf);
+ strcpy (own_buf, ";s;S");
+ }
+
+ if (target_supports_range_stepping ())
+ {
+ own_buf = own_buf + strlen (own_buf);
+ strcpy (own_buf, ";r");
+ }
+ return;
+ }
+ }
+
+ if (startswith (own_buf, "vFile:")
+ && handle_vFile (own_buf, packet_len, new_packet_len))
+ return;
+
+ if (startswith (own_buf, "vAttach;"))
+ {
+ if ((!extended_protocol || !multi_process) && target_running ())
+ {
+ fprintf (stderr, "Already debugging a process\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_attach (own_buf);
+ return;
+ }
+
+ if (startswith (own_buf, "vRun;"))
+ {
+ if ((!extended_protocol || !multi_process) && target_running ())
+ {
+ fprintf (stderr, "Already debugging a process\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_run (own_buf);
+ return;
+ }
+
+ if (startswith (own_buf, "vKill;"))
+ {
+ if (!target_running ())
+ {
+ fprintf (stderr, "No process to kill\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_kill (own_buf);
+ return;
+ }
+
+ if (handle_notif_ack (own_buf, packet_len))
+ return;
+
+ /* Otherwise we didn't know what packet it was. Say we didn't
+ understand it. */
+ own_buf[0] = 0;
+ return;
+}
+
+/* Resume thread and wait for another event. In non-stop mode,
+ don't really wait here, but return immediatelly to the event
+ loop. */
+static void
+myresume (char *own_buf, int step, int sig)
+{
+ struct thread_resume resume_info[2];
+ int n = 0;
+ int valid_cont_thread;
+
+ 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 = current_ptid;
+ 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++;
+ }
+
+ resume (resume_info, n);
+}
+
+/* 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 vstop_notif *new_notif = XNEW (struct vstop_notif);
+
+ new_notif->ptid = entry->id;
+ new_notif->status = thread->last_status;
+ /* Pass the last stop reply back to GDB, but don't notify
+ yet. */
+ notif_event_enque (¬if_stop,
+ (struct notif_event *) new_notif);
+ }
+ else
+ {
+ if (thread_stopped (thread))
+ {
+ if (debug_threads)
+ {
+ char *status_string
+ = target_waitstatus_to_string (&thread->last_status);
+
+ debug_printf ("Reporting thread %s as already stopped with %s\n",
+ target_pid_to_str (entry->id),
+ status_string);
+
+ xfree (status_string);
+ }
+
+ gdb_assert (thread->last_status.kind != TARGET_WAITKIND_IGNORE);
+
+ /* 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 threads's state as "want-stopped". We won't
+ resume this thread 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)
+ {
+ /* Most threads are stopped implicitly (all-stop); tag that with
+ signal 0. */
+ thread->last_status.kind = TARGET_WAITKIND_STOPPED;
+ thread->last_status.value.sig = GDB_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;
+}
+
+/* Callback for for_each_inferior. Clear the thread's pending status
+ flag. */
+
+static void
+clear_pending_status_callback (struct inferior_list_entry *entry)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ thread->status_pending_p = 0;
+}
+
+/* Callback for for_each_inferior. If the thread is stopped with an
+ interesting event, mark it as having a pending event. */
+
+static void
+set_pending_status_callback (struct inferior_list_entry *entry)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ if (thread->last_status.kind != TARGET_WAITKIND_STOPPED
+ || (thread->last_status.value.sig != GDB_SIGNAL_0
+ /* A breakpoint, watchpoint or finished step from a previous
+ GDB run isn't considered interesting for a new GDB run.
+ If we left those pending, the new GDB could consider them
+ random SIGTRAPs. This leaves out real async traps. We'd
+ have to peek into the (target-specific) siginfo to
+ distinguish those. */
+ && thread->last_status.value.sig != GDB_SIGNAL_TRAP))
+ thread->status_pending_p = 1;
+}
+
+/* Callback for find_inferior. Return true if ENTRY (a thread) has a
+ pending status to report to GDB. */
+
+static int
+find_status_pending_thread_callback (struct inferior_list_entry *entry, void *data)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ return thread->status_pending_p;
+}
+
+/* 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)
+ {
+ 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). */
+ notif_write_event (¬if_stop, own_buf);
+ }
+ else
+ {
+ struct inferior_list_entry *thread = NULL;
+
+ pause_all (0);
+ stabilize_threads ();
+ gdb_wants_all_threads_stopped ();
+
+ /* We can only report one status, but we might be coming out of
+ non-stop -- if more than one thread is stopped with
+ interesting events, leave events for the threads we're not
+ reporting now pending. They'll be reported the next time the
+ threads are resumed. Start by marking all interesting events
+ as pending. */
+ for_each_inferior (&all_threads, set_pending_status_callback);
+
+ /* Prefer the last thread that reported an event to GDB (even if
+ that was a GDB_SIGNAL_TRAP). */
+ if (last_status.kind != TARGET_WAITKIND_IGNORE
+ && last_status.kind != TARGET_WAITKIND_EXITED
+ && last_status.kind != TARGET_WAITKIND_SIGNALLED)
+ thread = find_inferior_id (&all_threads, last_ptid);
+
+ /* If the last event thread is not found for some reason, look
+ for some other thread that might have an event to report. */
+ if (thread == NULL)
+ thread = find_inferior (&all_threads,
+ find_status_pending_thread_callback, NULL);
+
+ /* If we're still out of luck, simply pick the first thread in
+ the thread list. */
+ if (thread == NULL)
+ thread = get_first_inferior (&all_threads);
+
+ if (thread != NULL)
+ {
+ struct thread_info *tp = (struct thread_info *) thread;
+
+ /* We're reporting this event, so it's no longer
+ pending. */
+ tp->status_pending_p = 0;
+
+ /* GDB assumes the current thread is the thread we're
+ reporting the status for. */
+ general_thread = thread->id;
+ set_desired_thread (1);
+
+ gdb_assert (tp->last_status.kind != TARGET_WAITKIND_IGNORE);
+ prepare_resume_reply (own_buf, tp->entry.id, &tp->last_status);
+ }
+ else
+ strcpy (own_buf, "W00");
+ }
+}
+
+static void
+gdbserver_version (void)
+{
+ printf ("GNU gdbserver %s%s\n"
+ "Copyright (C) 2016 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),\n"
+ "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
+ "stdin/stdout of gdbserver.\n"
+ "PROG is the executable program. ARGS are arguments passed to inferior.\n"
+ "PID is the process ID to attach to, when --attach is specified.\n"
+ "\n"
+ "Operating modes:\n"
+ "\n"
+ " --attach Attach to running process PID.\n"
+ " --multi Start server without a specific program, and\n"
+ " only quit when explicitly commanded.\n"
+ " --once Exit after the first connection has closed.\n"
+ " --help Print this message and then exit.\n"
+ " --version Display version information and exit.\n"
+ "\n"
+ "Other options:\n"
+ "\n"
+ " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
+ " --disable-randomization\n"
+ " Run PROG with address space randomization disabled.\n"
+ " --no-disable-randomization\n"
+ " Don't disable address space randomization when\n"
+ " starting PROG.\n"
+ "\n"
+ "Debug options:\n"
+ "\n"
+ " --debug Enable general debugging output.\n"
+ " --debug-format=opt1[,opt2,...]\n"
+ " Specify extra content in debugging output.\n"
+ " Options:\n"
+ " all\n"
+ " none\n"
+ " timestamp\n"
+ " --remote-debug Enable remote protocol debugging output.\n"
+ " --disable-packet=opt1[,opt2,...]\n"
+ " Disable support for RSP packets or features.\n"
+ " Options:\n"
+ " vCont, Tthread, qC, qfThreadInfo and \n"
+ " threads (disable all threading packets).\n"
+ "\n"
+ "For more information, consult the GDB manual (available as on-line \n"
+ "info or a printed manual).\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->entry.id);
+
+ kill_inferior (pid);
+ discard_queued_stop_replies (pid_to_ptid (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->entry.id);
+
+ if (process->attached)
+ detach_inferior (pid);
+ else
+ kill_inferior (pid);
+
+ discard_queued_stop_replies (pid_to_ptid (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->entry.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->entry.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);
+}
+
+/* Value that will be passed to exit(3) when gdbserver exits. */
+static int exit_code;
+
+/* Cleanup version of detach_or_kill_for_exit. */
+
+static void
+detach_or_kill_for_exit_cleanup (void *ignore)
+{
+
+ TRY
+ {
+ detach_or_kill_for_exit ();
+ }
+
+ CATCH (exception, RETURN_MASK_ALL)
+ {
+ fflush (stdout);
+ fprintf (stderr, "Detach or kill failed: %s\n", exception.message);
+ exit_code = 1;
+ }
+ END_CATCH
+}
+
+/* Main function. This is called by the real "main" function,
+ wrapped in a TRY_CATCH that handles any uncaught exceptions. */
+
+static void ATTRIBUTE_NORETURN
+captured_main (int argc, char *argv[])
+{
+ int bad_attach;
+ int pid;
+ char *arg_end, *port;
+ char **next_arg = &argv[1];
+ volatile int multi_mode = 0;
+ volatile 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 (startswith (*next_arg, "--debug-format="))
+ {
+ char *error_msg
+ = parse_debug_format_options ((*next_arg)
+ + sizeof ("--debug-format=") - 1, 0);
+
+ if (error_msg != NULL)
+ {
+ fprintf (stderr, "%s", error_msg);
+ exit (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 (startswith (*next_arg, "--disable-packet="))
+ {
+ 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 (*next_arg, "-") == 0)
+ {
+ /* "-" specifies a stdio connection and is a form of port
+ specification. */
+ *next_arg = STDIO_CONNECTION_NAME;
+ break;
+ }
+ else if (strcmp (*next_arg, "--disable-randomization") == 0)
+ disable_randomization = 1;
+ else if (strcmp (*next_arg, "--no-disable-randomization") == 0)
+ disable_randomization = 0;
+ else if (strcmp (*next_arg, "--once") == 0)
+ run_once = 1;
else
{
fprintf (stderr, "Unknown argument: %s\n", *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))
exit (1);
}
+ /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
+ opened by remote_prepare. */
+ notice_open_fds ();
+
+ /* We need to know whether the remote connection is stdio before
+ starting the inferior. Inferiors created in this scenario have
+ stdin,stdout redirected. So do this here before we call
+ start_inferior. */
+ remote_prepare (port);
+
bad_attach = 0;
pid = 0;
initialize_async_io ();
initialize_low ();
+ initialize_event_loop ();
+ if (target_supports_tracepoints ())
+ initialize_tracepoint ();
+ initialize_notif ();
- own_buf = xmalloc (PBUFSIZ + 1);
- mem_buf = xmalloc (PBUFSIZ);
+ own_buf = (char *) xmalloc (PBUFSIZ + 1);
+ mem_buf = (unsigned char *) xmalloc (PBUFSIZ);
if (pid == 0 && *next_arg != NULL)
{
int i, n;
n = argc - (next_arg - argv);
- program_argv = xmalloc (sizeof (char *) * (n + 1));
+ program_argv = XNEWVEC (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. */
- signal = start_inferior (program_argv, &status);
+ start_inferior (program_argv);
/* We are now (hopefully) stopped at the first instruction of
the target process. This assumes that the target process was
}
else if (pid != 0)
{
- if (attach_inferior (pid, &status, &signal) == -1)
+ if (attach_inferior (pid) == -1)
error ("Attaching not supported on this target");
- /* Otherwise succeeded. */
- }
- else
+ /* Otherwise succeeded. */
+ }
+ else
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.integer = 0;
+ last_ptid = minus_one_ptid;
+ }
+ make_cleanup (detach_or_kill_for_exit_cleanup, NULL);
+
+ /* 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 (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ was_running = 0;
+ else
+ was_running = 1;
+
+ if (!was_running && !multi_mode)
+ error ("No program to debug");
+
+ while (1)
+ {
+
+ noack_mode = 0;
+ multi_process = 0;
+ report_fork_events = 0;
+ report_vfork_events = 0;
+ report_exec_events = 0;
+ /* Be sure we're out of tfind mode. */
+ current_traceframe = -1;
+ cont_thread = null_ptid;
+ swbreak_feature = 0;
+ hwbreak_feature = 0;
+ vCont_supported = 0;
+
+ remote_open (port);
+
+ TRY
+ {
+ /* Wait for events. This will return when all event sources
+ are removed from the event loop. */
+ start_event_loop ();
+
+ /* If an exit was requested (using the "monitor exit"
+ command), terminate now. */
+ if (exit_requested)
+ throw_quit ("Quit");
+
+ /* The only other way to get here is for getpkt to fail:
+
+ - If --once was specified, we're done.
+
+ - If not in extended-remote mode, and we're no longer
+ debugging anything, simply exit: GDB has disconnected
+ after processing the last process exit.
+
+ - Otherwise, close the connection and reopen it at the
+ top of the loop. */
+ if (run_once || (!extended_protocol && !target_running ()))
+ throw_quit ("Quit");
+
+ fprintf (stderr,
+ "Remote side has terminated connection. "
+ "GDBserver will reopen the connection.\n");
+
+ /* Get rid of any pending statuses. An eventual reconnection
+ (by the same GDB instance or another) will refresh all its
+ state from scratch. */
+ discard_queued_stop_replies (minus_one_ptid);
+ for_each_inferior (&all_threads,
+ clear_pending_status_callback);
+
+ if (tracing)
+ {
+ if (disconnected_tracing)
+ {
+ /* 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 ();
+ }
+ }
+ }
+ CATCH (exception, RETURN_MASK_ERROR)
+ {
+ fflush (stdout);
+ fprintf (stderr, "gdbserver: %s\n", exception.message);
+
+ if (response_needed)
+ {
+ write_enn (own_buf);
+ putpkt (own_buf);
+ }
+
+ if (run_once)
+ throw_quit ("Quit");
+ }
+ END_CATCH
+ }
+}
+
+/* Main function. */
+
+int
+main (int argc, char *argv[])
+{
+
+ TRY
+ {
+ captured_main (argc, argv);
+ }
+ CATCH (exception, RETURN_MASK_ALL)
+ {
+ if (exception.reason == RETURN_ERROR)
+ {
+ fflush (stdout);
+ fprintf (stderr, "%s\n", exception.message);
+ fprintf (stderr, "Exiting\n");
+ exit_code = 1;
+ }
+
+ exit (exit_code);
+ }
+ END_CATCH
+
+ gdb_assert_not_reached ("captured_main should never return");
+}
+
+/* Skip PACKET until the next semi-colon (or end of string). */
+
+static void
+skip_to_semicolon (char **packet)
+{
+ while (**packet != '\0' && **packet != ';')
+ (*packet)++;
+}
+
+/* Process options coming from Z packets for a breakpoint. PACKET is
+ the packet buffer. *PACKET is updated to point to the first char
+ after the last processed option. */
+
+static void
+process_point_options (struct breakpoint *bp, char **packet)
+{
+ char *dataptr = *packet;
+ int persist;
+
+ /* Check if data has the correct format. */
+ if (*dataptr != ';')
+ return;
+
+ dataptr++;
+
+ while (*dataptr)
{
- status = 'W';
- signal = 0;
+ if (*dataptr == ';')
+ ++dataptr;
+
+ if (*dataptr == 'X')
+ {
+ /* Conditional expression. */
+ if (debug_threads)
+ debug_printf ("Found breakpoint condition.\n");
+ if (!add_breakpoint_condition (bp, &dataptr))
+ skip_to_semicolon (&dataptr);
+ }
+ else if (startswith (dataptr, "cmds:"))
+ {
+ dataptr += strlen ("cmds:");
+ if (debug_threads)
+ debug_printf ("Found breakpoint commands %s.\n", dataptr);
+ persist = (*dataptr == '1');
+ dataptr += 2;
+ if (add_breakpoint_commands (bp, &dataptr, persist))
+ skip_to_semicolon (&dataptr);
+ }
+ else
+ {
+ fprintf (stderr, "Unknown token %c, ignoring.\n",
+ *dataptr);
+ /* Skip tokens until we find one that we recognize. */
+ skip_to_semicolon (&dataptr);
+ }
}
+ *packet = dataptr;
+}
- /* 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;
+/* 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. */
- if (setjmp (toplevel))
- {
- fprintf (stderr, "Killing inferior\n");
- kill_inferior ();
- exit (1);
- }
+static int
+process_serial_event (void)
+{
+ char ch;
+ int i = 0;
+ int signal;
+ unsigned int len;
+ int res;
+ CORE_ADDR mem_addr;
+ int pid;
+ unsigned char sig;
+ int packet_len;
+ int new_packet_len = -1;
- if (status == 'W' || status == 'X')
- was_running = 0;
- else
- was_running = 1;
+ disable_async_io ();
- if (!was_running && !multi_mode)
+ response_needed = 0;
+ packet_len = getpkt (own_buf);
+ if (packet_len <= 0)
{
- fprintf (stderr, "No program to debug. GDBserver exiting.\n");
- exit (1);
+ remote_close ();
+ /* Force an event loop break. */
+ return -1;
}
+ response_needed = 1;
- while (1)
+ i = 0;
+ ch = own_buf[i++];
+ switch (ch)
{
- noack_mode = 0;
- remote_open (port);
+ 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);
- restart:
- if (setjmp (toplevel) != 0)
+ if (multi_process)
{
- /* An error occurred. */
- if (response_needed)
+ i++; /* skip ';' */
+ pid = strtol (&own_buf[i], NULL, 16);
+ }
+ else
+ pid = ptid_get_pid (current_ptid);
+
+ if ((tracing && disconnected_tracing) || any_persistent_commands ())
+ {
+ struct thread_resume resume_info;
+ struct process_info *process = find_process_pid (pid);
+
+ if (process == NULL)
{
write_enn (own_buf);
- putpkt (own_buf);
+ break;
+ }
+
+ if (tracing && disconnected_tracing)
+ fprintf (stderr,
+ "Disconnected tracing in effect, "
+ "leaving gdbserver attached to the process\n");
+
+ if (any_persistent_commands ())
+ fprintf (stderr,
+ "Persistent commands are present, "
+ "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)
+ debug_printf ("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 */
}
- disable_async_io ();
- while (!exit_requested)
+ fprintf (stderr, "Detaching from process %d\n", pid);
+ stop_tracing ();
+ if (detach_inferior (pid) != 0)
+ write_enn (own_buf);
+ else
{
- unsigned char sig;
- int packet_len;
- int new_packet_len = -1;
-
- response_needed = 0;
- packet_len = getpkt (own_buf);
- if (packet_len <= 0)
- break;
- response_needed = 1;
+ discard_queued_stop_replies (pid_to_ptid (pid));
+ write_ok (own_buf);
- i = 0;
- ch = own_buf[i++];
- switch (ch)
+ if (extended_protocol || target_running ())
{
- 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);
- fprintf (stderr, "Detaching from inferior\n");
- if (detach_inferior () != 0)
- write_enn (own_buf);
- else
- {
- write_ok (own_buf);
-
- if (extended_protocol)
- {
- /* Treat this like a normal program exit. */
- signal = 0;
- status = 'W';
- }
- else
- {
- putpkt (own_buf);
- remote_close ();
+ /* There is still at least one inferior remaining or
+ we are in extended mode, so don't terminate gdbserver,
+ and instead 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_thread = 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)
- join_inferior ();
+ /* If we are attached, then we can exit. Otherwise, we
+ need to hang around doing nothing, until the child is
+ gone. */
+ join_inferior (pid);
+ 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;
- exit (0);
- }
- }
- break;
- case '!':
- extended_protocol = 1;
- write_ok (own_buf);
- 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;
+ require_running (own_buf);
- require_running (own_buf);
- gdb_id = strtoul (&own_buf[2], NULL, 16);
- if (gdb_id == 0 || gdb_id == -1)
- thread_id = gdb_id;
- else
- {
- thread_id = gdb_id_to_thread_id (gdb_id);
- if (thread_id == 0)
- {
- write_enn (own_buf);
- break;
- }
- }
+ gdb_id = read_ptid (&own_buf[2], NULL);
- 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;
+ pid = ptid_get_pid (gdb_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);
- set_desired_inferior (1);
- registers_to_string (own_buf);
- break;
- case 'G':
- require_running (own_buf);
- set_desired_inferior (1);
- registers_from_string (&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_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':
- require_running (own_buf);
- 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':
- require_running (own_buf);
- 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':
- 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, &status);
- 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, &status);
- break;
- case 'c':
- require_running (own_buf);
- signal = 0;
- myresume (own_buf, 0, &signal, &status);
- break;
- case 's':
- require_running (own_buf);
- signal = 0;
- myresume (own_buf, 1, &signal, &status);
- break;
- case 'Z':
- {
- char *lenptr;
- char *dataptr;
- CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
- int len = strtol (lenptr + 1, &dataptr, 16);
- char type = own_buf[1];
-
- if (the_target->insert_watchpoint == NULL
- || (type < '2' || type > '4'))
- {
- /* No watchpoint support or not a watchpoint command;
- unrecognized either way. */
- own_buf[0] = '\0';
- }
- else
- {
- int res;
-
- require_running (own_buf);
- 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;
-
- require_running (own_buf);
- 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':
- response_needed = 0;
- if (!target_running ())
- /* The packet we received doesn't make sense - but we
- can't reply to it, either. */
- goto restart;
-
- fprintf (stderr, "Killing inferior\n");
- kill_inferior ();
-
- /* When using the extended protocol, we wait with no
- program running. The traditional protocol will exit
- instead. */
- if (extended_protocol)
- {
- status = 'X';
- signal = TARGET_SIGNAL_KILL;
- was_running = 0;
- goto restart;
- }
- 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);
+ write_enn (own_buf);
break;
}
- case 'T':
- {
- unsigned long gdb_id, thread_id;
-
- require_running (own_buf);
- 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':
- response_needed = 0;
- /* Restarting the inferior is only supported in the
- extended protocol. */
- if (extended_protocol)
+ thread_id = thread->entry.id;
+ }
+ else
+ {
+ thread_id = gdb_id_to_thread_id (gdb_id);
+ if (ptid_equal (thread_id, null_ptid))
{
- if (target_running ())
- kill_inferior ();
- fprintf (stderr, "GDBserver restarting\n");
-
- /* Wait till we are at 1st instruction in prog. */
- if (program_argv != NULL)
- signal = start_inferior (program_argv, &status);
- else
- {
- status = 'X';
- signal = TARGET_SIGNAL_KILL;
- }
- goto restart;
+ write_enn (own_buf);
+ break;
}
- else
+ }
+
+ if (own_buf[1] == 'g')
+ {
+ if (ptid_equal (thread_id, null_ptid))
{
- /* 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;
+ /* 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 = get_first_thread ();
+ thread_id = thread->entry.id;
}
- case 'v':
- /* Extended (long) request. */
- handle_v_requests (own_buf, &status, &signal,
- packet_len, &new_packet_len);
- break;
- default:
- /* It is a request we don't understand. Respond with an
- empty packet so that gdb knows that we don't support this
- request. */
- own_buf[0] = '\0';
- break;
+ general_thread = thread_id;
+ set_desired_thread (1);
+ gdb_assert (current_thread != NULL);
+ }
+ else if (own_buf[1] == 'c')
+ cont_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 (current_target_desc ());
+
+ 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;
+
+ if (!set_desired_thread (1))
+ write_enn (own_buf);
+ else
+ {
+ regcache = get_thread_regcache (current_thread, 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;
- if (new_packet_len != -1)
- putpkt_binary (own_buf, new_packet_len);
+ if (!set_desired_thread (1))
+ write_enn (own_buf);
else
- putpkt (own_buf);
+ {
+ regcache = get_thread_regcache (current_thread, 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);
+ res = gdb_read_memory (mem_addr, mem_buf, len);
+ if (res < 0)
+ write_enn (own_buf);
+ else
+ bin2hex (mem_buf, own_buf, res);
+ break;
+ case 'M':
+ require_running (own_buf);
+ decode_M_packet (&own_buf[1], &mem_addr, &len, &mem_buf);
+ if (gdb_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
+ || gdb_write_memory (mem_addr, mem_buf, len) != 0)
+ write_enn (own_buf);
+ else
+ write_ok (own_buf);
+ break;
+ case 'C':
+ require_running (own_buf);
+ hex2bin (own_buf + 1, &sig, 1);
+ if (gdb_signal_to_host_p ((enum gdb_signal) sig))
+ signal = gdb_signal_to_host ((enum gdb_signal) sig);
+ else
+ signal = 0;
+ myresume (own_buf, 0, signal);
+ break;
+ case 'S':
+ require_running (own_buf);
+ hex2bin (own_buf + 1, &sig, 1);
+ if (gdb_signal_to_host_p ((enum gdb_signal) sig))
+ signal = gdb_signal_to_host ((enum gdb_signal) 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 *dataptr;
+ ULONGEST addr;
+ int kind;
+ char type = own_buf[1];
+ int res;
+ const int insert = ch == 'Z';
+ char *p = &own_buf[3];
+
+ p = unpack_varlen_hex (p, &addr);
+ kind = strtol (p + 1, &dataptr, 16);
+
+ if (insert)
+ {
+ struct breakpoint *bp;
+
+ bp = set_gdb_breakpoint (type, addr, kind, &res);
+ if (bp != NULL)
+ {
+ res = 0;
+
+ /* GDB may have sent us a list of *point parameters to
+ be evaluated on the target's side. Read such list
+ here. If we already have a list of parameters, GDB
+ is telling us to drop that list and use this one
+ instead. */
+ clear_breakpoint_conditions_and_commands (bp);
+ process_point_options (bp, &dataptr);
+ }
+ }
+ else
+ res = delete_gdb_breakpoint (type, addr, kind);
+
+ 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 = GDB_SIGNAL_KILL;
+ return 0;
+ }
+ else
+ exit (0);
- response_needed = 0;
+ case 'T':
+ {
+ ptid_t gdb_id, thread_id;
- if (was_running && (status == 'W' || status == 'X'))
+ 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;
+ }
+
+ if (mythread_alive (thread_id))
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ }
+ break;
+ case 'R':
+ response_needed = 0;
+
+ /* 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)
{
- was_running = 0;
-
- 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 (extended_protocol)
- goto restart;
+ start_inferior (program_argv);
+ if (last_status.kind == TARGET_WAITKIND_STOPPED)
+ {
+ /* Stopped at the first instruction of the target
+ process. */
+ general_thread = last_ptid;
+ }
else
{
- fprintf (stderr, "GDBserver exiting\n");
- exit (0);
+ /* Something went wrong. */
+ general_thread = null_ptid;
}
}
-
- if (status != 'W' && status != 'X')
- was_running = 1;
+ else
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.sig = GDB_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 (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)
+ debug_printf ("handling possible serial event\n");
+
+ /* Really handle it. */
+ if (process_serial_event () < 0)
+ return -1;
+
+ /* Be sure to not change the selected thread behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_thread (1);
- /* 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. */
+ return 0;
+}
+
+/* Push a stop notification on the notification queue. */
+
+static void
+push_stop_notification (ptid_t ptid, struct target_waitstatus *status)
+{
+ struct vstop_notif *vstop_notif = XNEW (struct vstop_notif);
+
+ vstop_notif->status = *status;
+ vstop_notif->ptid = ptid;
+ /* Push Stop notification. */
+ notif_push (¬if_stop, (struct notif_event *) vstop_notif);
+}
+
+/* Event-loop callback for target events. */
+
+int
+handle_target_event (int err, gdb_client_data client_data)
+{
+ if (debug_threads)
+ debug_printf ("handling possible target event\n");
+
+ last_ptid = mywait (minus_one_ptid, &last_status,
+ TARGET_WNOHANG, 1);
+
+ if (last_status.kind == TARGET_WAITKIND_NO_RESUMED)
+ {
+ if (gdb_connected () && report_no_resumed)
+ push_stop_notification (null_ptid, &last_status);
+ }
+ else 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 (exit_requested)
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
{
- remote_close ();
- if (attached && target_running ())
- detach_inferior ();
- else if (target_running ())
- kill_inferior ();
- exit (0);
+ mark_breakpoints_out (process);
+ mourn_inferior (process);
}
+ else if (last_status.kind == TARGET_WAITKIND_THREAD_EXITED)
+ ;
else
{
- fprintf (stderr, "Remote side has terminated connection. "
- "GDBserver will reopen the connection.\n");
- remote_close ();
+ /* We're reporting this thread as stopped. Update its
+ "want-stopped" state to what the client wants, until it
+ gets a new resume action. */
+ current_thread->last_resume_kind = resume_stop;
+ current_thread->last_status = last_status;
+ }
+
+ if (forward_event)
+ {
+ if (!target_running ())
+ {
+ /* The last process exited. We're done. */
+ exit (0);
+ }
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED
+ || last_status.kind == TARGET_WAITKIND_THREAD_EXITED)
+ ;
+ else
+ {
+ /* 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)
+ debug_printf ("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;
+ if (last_status.kind == TARGET_WAITKIND_STOPPED)
+ resume_info.sig = gdb_signal_to_host (last_status.value.sig);
+ else
+ resume_info.sig = 0;
+ (*the_target->resume) (&resume_info, 1);
+ }
}
+ else
+ push_stop_notification (last_ptid, &last_status);
}
+
+ /* Be sure to not change the selected thread behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_thread (1);
+
+ return 0;
}
projects / deliverable / binutils-gdb.git / blobdiff