/* Main code for remote server for GDB.
Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of GDB.
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
+#if HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+
+ptid_t cont_thread;
+ptid_t general_thread;
+ptid_t step_thread;
-unsigned long cont_thread;
-unsigned long general_thread;
-unsigned long step_thread;
-unsigned long thread_from_wait;
-unsigned long old_thread_from_wait;
int server_waiting;
static int extended_protocol;
-static int attached;
static int response_needed;
static int exit_requested;
+int multi_process;
+int non_stop;
+
static char **program_argv, **wrapper_argv;
/* Enable miscellaneous debugging output. The name is historical - it
was originally used to debug LinuxThreads support. */
int debug_threads;
+/* Enable debugging of h/w breakpoint/watchpoint support. */
+int debug_hw_points;
+
int pass_signals[TARGET_SIGNAL_LAST];
jmp_buf toplevel;
}
#endif
+/* Set if you want to disable optional thread related packets support
+ in gdbserver, for the sake of testing GDB against stubs that don't
+ support them. */
+int disable_packet_vCont;
+int disable_packet_Tthread;
+int disable_packet_qC;
+int disable_packet_qfThreadInfo;
+
+/* Last status reported to GDB. */
+static struct target_waitstatus last_status;
+static ptid_t last_ptid;
+
+static char *own_buf;
+static unsigned char *mem_buf;
+
+/* Structure holding information relative to a single stop reply. We
+ keep a queue of these (really a singly-linked list) to push to GDB
+ in non-stop mode. */
+struct vstop_notif
+{
+ /* Pointer to next in list. */
+ struct vstop_notif *next;
+
+ /* Thread or process that got the event. */
+ ptid_t ptid;
+
+ /* Event info. */
+ struct target_waitstatus status;
+};
+
+/* The pending stop replies list head. */
+static struct vstop_notif *notif_queue = NULL;
+
+/* Put a stop reply to the stop reply queue. */
+
+static void
+queue_stop_reply (ptid_t ptid, struct target_waitstatus *status)
+{
+ struct vstop_notif *new_notif;
+
+ new_notif = malloc (sizeof (*new_notif));
+ new_notif->next = NULL;
+ new_notif->ptid = ptid;
+ new_notif->status = *status;
+
+ if (notif_queue)
+ {
+ struct vstop_notif *tail;
+ for (tail = notif_queue;
+ tail && tail->next;
+ tail = tail->next)
+ ;
+ tail->next = new_notif;
+ }
+ else
+ notif_queue = new_notif;
+
+ if (remote_debug)
+ {
+ int i = 0;
+ struct vstop_notif *n;
+
+ for (n = notif_queue; n; n = n->next)
+ i++;
+
+ fprintf (stderr, "pending stop replies: %d\n", i);
+ }
+}
+
+/* Place an event in the stop reply queue, and push a notification if
+ we aren't sending one yet. */
+
+void
+push_event (ptid_t ptid, struct target_waitstatus *status)
+{
+ queue_stop_reply (ptid, status);
+
+ /* If this is the first stop reply in the queue, then inform GDB
+ about it, by sending a Stop notification. */
+ if (notif_queue->next == NULL)
+ {
+ char *p = own_buf;
+ strcpy (p, "Stop:");
+ p += strlen (p);
+ prepare_resume_reply (p,
+ notif_queue->ptid, ¬if_queue->status);
+ putpkt_notif (own_buf);
+ }
+}
+
+/* Get rid of the currently pending stop replies for PID. If PID is
+ -1, then apply to all processes. */
+
+static void
+discard_queued_stop_replies (int pid)
+{
+ struct vstop_notif *prev = NULL, *reply, *next;
+
+ for (reply = notif_queue; reply; reply = next)
+ {
+ next = reply->next;
+
+ if (pid == -1
+ || ptid_get_pid (reply->ptid) == pid)
+ {
+ if (reply == notif_queue)
+ notif_queue = next;
+ else
+ prev->next = reply->next;
+
+ free (reply);
+ }
+ else
+ prev = reply;
+ }
+}
+
+/* If there are more stop replies to push, push one now. */
+
+static void
+send_next_stop_reply (char *own_buf)
+{
+ if (notif_queue)
+ prepare_resume_reply (own_buf,
+ notif_queue->ptid,
+ ¬if_queue->status);
+ else
+ write_ok (own_buf);
+}
+
static int
target_running (void)
{
}
static int
-start_inferior (char **argv, char *statusptr)
+start_inferior (char **argv)
{
char **new_argv = argv;
- attached = 0;
if (wrapper_argv != NULL)
{
if (wrapper_argv != NULL)
{
struct thread_resume resume_info;
- int sig;
+ ptid_t ptid;
- resume_info.thread = -1;
- resume_info.step = 0;
+ 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;
+ ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+
+ if (last_status.kind != TARGET_WAITKIND_STOPPED)
+ return signal_pid;
do
{
- (*the_target->resume) (&resume_info);
+ (*the_target->resume) (&resume_info, 1);
- sig = mywait (statusptr, 0);
- if (*statusptr != 'T')
- return sig;
+ mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+ if (last_status.kind != TARGET_WAITKIND_STOPPED)
+ return signal_pid;
}
- while (sig != TARGET_SIGNAL_TRAP);
+ while (last_status.value.sig != TARGET_SIGNAL_TRAP);
- return sig;
+ return signal_pid;
}
- /* Wait till we are at 1st instruction in program, return signal
- number (assuming success). */
- return mywait (statusptr, 0);
+ /* Wait till we are at 1st instruction in program, return new pid
+ (assuming success). */
+ last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0);
+
+ return signal_pid;
}
static int
-attach_inferior (int pid, char *statusptr, int *sigptr)
+attach_inferior (int pid)
{
/* myattach should return -1 if attaching is unsupported,
0 if it succeeded, and call error() otherwise. */
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);
-
- /* GDB knows to ignore the first SIGSTOP after attaching to a running
- process using the "attach" command, but this is different; it's
- just using "target remote". Pretend it's just starting up. */
- if (*statusptr == 'T' && *sigptr == TARGET_SIGNAL_STOP)
- *sigptr = TARGET_SIGNAL_TRAP;
+ if (!non_stop)
+ {
+ last_ptid = mywait (pid_to_ptid (pid), &last_status, 0, 0);
+
+ /* GDB knows to ignore the first SIGSTOP after attaching to a running
+ process using the "attach" command, but this is different; it's
+ just using "target remote". Pretend it's just starting up. */
+ if (last_status.kind == TARGET_WAITKIND_STOPPED
+ && last_status.value.sig == TARGET_SIGNAL_STOP)
+ last_status.value.sig = TARGET_SIGNAL_TRAP;
+ }
return 0;
}
return;
}
+ if (strcmp (own_buf, "QStartNoAckMode") == 0)
+ {
+ if (remote_debug)
+ {
+ fprintf (stderr, "[noack mode enabled]\n");
+ fflush (stderr);
+ }
+
+ noack_mode = 1;
+ write_ok (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "QNonStop:", 9) == 0)
+ {
+ char *mode = own_buf + 9;
+ int req = -1;
+ char *req_str;
+
+ if (strcmp (mode, "0") == 0)
+ req = 0;
+ else if (strcmp (mode, "1") == 0)
+ req = 1;
+ else
+ {
+ /* We don't know what this mode is, so complain to
+ GDB. */
+ fprintf (stderr, "Unknown non-stop mode requested: %s\n",
+ own_buf);
+ write_enn (own_buf);
+ return;
+ }
+
+ req_str = req ? "non-stop" : "all-stop";
+ if (start_non_stop (req) != 0)
+ {
+ fprintf (stderr, "Setting %s mode failed\n", req_str);
+ write_enn (own_buf);
+ return;
+ }
+
+ non_stop = req;
+
+ if (remote_debug)
+ fprintf (stderr, "[%s mode enabled]\n", req_str);
+
+ write_ok (own_buf);
+ return;
+ }
+
+ if (target_supports_tracepoints ()
+ && handle_tracepoint_general_set (own_buf))
+ return;
+
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
init_registers_... routine for the current target. */
if (gdbserver_xmltarget
- && strcmp (annex, "target.xml") != 0)
+ && strcmp (annex, "target.xml") == 0)
{
if (*gdbserver_xmltarget == '@')
return gdbserver_xmltarget + 1;
{
monitor_output ("The following monitor commands are supported:\n");
monitor_output (" set debug <0|1>\n");
- monitor_output (" Enable general debugging messages\n");
+ monitor_output (" Enable general debugging messages\n");
+ monitor_output (" set debug-hw-points <0|1>\n");
+ monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
monitor_output (" set remote-debug <0|1>\n");
monitor_output (" Enable remote protocol debugging messages\n");
monitor_output (" exit\n");
monitor_output (" Quit GDBserver\n");
}
+/* Read trace frame or inferior memory. */
+
+static int
+read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
+{
+ if (current_traceframe >= 0)
+ {
+ ULONGEST nbytes;
+ ULONGEST length = len;
+
+ if (traceframe_read_mem (current_traceframe,
+ memaddr, myaddr, len, &nbytes))
+ return EIO;
+ /* Data read from trace buffer, we're done. */
+ if (nbytes == length)
+ return 0;
+ if (!in_readonly_region (memaddr, length))
+ return EIO;
+ /* Otherwise we have a valid readonly case, fall through. */
+ /* (assume no half-trace half-real blocks for now) */
+ }
+
+ return read_inferior_memory (memaddr, myaddr, len);
+}
+
+/* Write trace frame or inferior memory. Actually, writing to trace
+ frames is forbidden. */
+
+static int
+write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
+{
+ if (current_traceframe >= 0)
+ return EIO;
+ else
+ return write_inferior_memory (memaddr, myaddr, len);
+}
+
+/* Subroutine of handle_search_memory to simplify it. */
+
+static int
+handle_search_memory_1 (CORE_ADDR start_addr, CORE_ADDR search_space_len,
+ gdb_byte *pattern, unsigned pattern_len,
+ gdb_byte *search_buf,
+ unsigned chunk_size, unsigned search_buf_size,
+ CORE_ADDR *found_addrp)
+{
+ /* Prime the search buffer. */
+
+ if (read_memory (start_addr, search_buf, search_buf_size) != 0)
+ {
+ warning ("Unable to access target memory at 0x%lx, halting search.",
+ (long) start_addr);
+ return -1;
+ }
+
+ /* Perform the search.
+
+ The loop is kept simple by allocating [N + pattern-length - 1] bytes.
+ When we've scanned N bytes we copy the trailing bytes to the start and
+ read in another N bytes. */
+
+ while (search_space_len >= pattern_len)
+ {
+ gdb_byte *found_ptr;
+ unsigned nr_search_bytes = (search_space_len < search_buf_size
+ ? search_space_len
+ : search_buf_size);
+
+ found_ptr = memmem (search_buf, nr_search_bytes, pattern, pattern_len);
+
+ if (found_ptr != NULL)
+ {
+ CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
+ *found_addrp = found_addr;
+ return 1;
+ }
+
+ /* Not found in this chunk, skip to next chunk. */
+
+ /* Don't let search_space_len wrap here, it's unsigned. */
+ if (search_space_len >= chunk_size)
+ search_space_len -= chunk_size;
+ else
+ search_space_len = 0;
+
+ if (search_space_len >= pattern_len)
+ {
+ unsigned keep_len = search_buf_size - chunk_size;
+ CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
+ int nr_to_read;
+
+ /* Copy the trailing part of the previous iteration to the front
+ of the buffer for the next iteration. */
+ memcpy (search_buf, search_buf + chunk_size, keep_len);
+
+ nr_to_read = (search_space_len - keep_len < chunk_size
+ ? search_space_len - keep_len
+ : chunk_size);
+
+ if (read_memory (read_addr, search_buf + keep_len,
+ nr_to_read) != 0)
+ {
+ warning ("Unable to access target memory at 0x%lx, halting search.",
+ (long) read_addr);
+ return -1;
+ }
+
+ start_addr += chunk_size;
+ }
+ }
+
+ /* Not found. */
+
+ return 0;
+}
+
+/* Handle qSearch:memory packets. */
+
+static void
+handle_search_memory (char *own_buf, int packet_len)
+{
+ CORE_ADDR start_addr;
+ CORE_ADDR search_space_len;
+ gdb_byte *pattern;
+ unsigned int pattern_len;
+ /* NOTE: also defined in find.c testcase. */
+#define SEARCH_CHUNK_SIZE 16000
+ const unsigned chunk_size = SEARCH_CHUNK_SIZE;
+ /* Buffer to hold memory contents for searching. */
+ gdb_byte *search_buf;
+ unsigned search_buf_size;
+ int found;
+ CORE_ADDR found_addr;
+ int cmd_name_len = sizeof ("qSearch:memory:") - 1;
+
+ pattern = malloc (packet_len);
+ if (pattern == NULL)
+ {
+ error ("Unable to allocate memory to perform the search");
+ strcpy (own_buf, "E00");
+ return;
+ }
+ if (decode_search_memory_packet (own_buf + cmd_name_len,
+ packet_len - cmd_name_len,
+ &start_addr, &search_space_len,
+ pattern, &pattern_len) < 0)
+ {
+ free (pattern);
+ error ("Error in parsing qSearch:memory packet");
+ strcpy (own_buf, "E00");
+ return;
+ }
+
+ search_buf_size = chunk_size + pattern_len - 1;
+
+ /* No point in trying to allocate a buffer larger than the search space. */
+ if (search_space_len < search_buf_size)
+ search_buf_size = search_space_len;
+
+ search_buf = malloc (search_buf_size);
+ if (search_buf == NULL)
+ {
+ free (pattern);
+ error ("Unable to allocate memory to perform the search");
+ strcpy (own_buf, "E00");
+ return;
+ }
+
+ found = handle_search_memory_1 (start_addr, search_space_len,
+ pattern, pattern_len,
+ search_buf, chunk_size, search_buf_size,
+ &found_addr);
+
+ if (found > 0)
+ sprintf (own_buf, "1,%lx", (long) found_addr);
+ else if (found == 0)
+ strcpy (own_buf, "0");
+ else
+ strcpy (own_buf, "E00");
+
+ free (search_buf);
+ free (pattern);
+}
+
#define require_running(BUF) \
if (!target_running ()) \
{ \
return; \
}
+/* Handle monitor commands not handled by target-specific handlers. */
+
+static void
+handle_monitor_command (char *mon)
+{
+ if (strcmp (mon, "set debug 1") == 0)
+ {
+ debug_threads = 1;
+ monitor_output ("Debug output enabled.\n");
+ }
+ else if (strcmp (mon, "set debug 0") == 0)
+ {
+ debug_threads = 0;
+ monitor_output ("Debug output disabled.\n");
+ }
+ else if (strcmp (mon, "set debug-hw-points 1") == 0)
+ {
+ debug_hw_points = 1;
+ monitor_output ("H/W point debugging output enabled.\n");
+ }
+ else if (strcmp (mon, "set debug-hw-points 0") == 0)
+ {
+ debug_hw_points = 0;
+ monitor_output ("H/W point debugging output disabled.\n");
+ }
+ else if (strcmp (mon, "set remote-debug 1") == 0)
+ {
+ remote_debug = 1;
+ monitor_output ("Protocol debug output enabled.\n");
+ }
+ else if (strcmp (mon, "set remote-debug 0") == 0)
+ {
+ remote_debug = 0;
+ monitor_output ("Protocol debug output disabled.\n");
+ }
+ else if (strcmp (mon, "help") == 0)
+ monitor_show_help ();
+ else if (strcmp (mon, "exit") == 0)
+ exit_requested = 1;
+ else
+ {
+ monitor_output ("Unknown monitor command.\n\n");
+ monitor_show_help ();
+ write_enn (own_buf);
+ }
+}
+
+static void
+handle_threads_qxfer_proper (struct buffer *buffer)
+{
+ struct inferior_list_entry *thread;
+
+ buffer_grow_str (buffer, "<threads>\n");
+
+ for (thread = all_threads.head; thread; thread = thread->next)
+ {
+ ptid_t ptid = thread_to_gdb_id ((struct thread_info *)thread);
+ char ptid_s[100];
+ int core = -1;
+ char core_s[21];
+
+ write_ptid (ptid_s, ptid);
+
+ if (the_target->core_of_thread)
+ core = (*the_target->core_of_thread) (ptid);
+
+ if (core != -1)
+ {
+ sprintf (core_s, "%d", core);
+ buffer_xml_printf (buffer, "<thread id=\"%s\" core=\"%s\"/>\n",
+ ptid_s, core_s);
+ }
+ else
+ {
+ buffer_xml_printf (buffer, "<thread id=\"%s\"/>\n",
+ ptid_s);
+ }
+ }
+
+ buffer_grow_str0 (buffer, "</threads>\n");
+}
+
+static int
+handle_threads_qxfer (const char *annex,
+ unsigned char *readbuf,
+ CORE_ADDR offset, int length)
+{
+ static char *result = 0;
+ static unsigned int result_length = 0;
+
+ if (annex && strcmp (annex, "") != 0)
+ return 0;
+
+ if (offset == 0)
+ {
+ 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_threads_qxfer_proper (&buffer);
+
+ result = buffer_finish (&buffer);
+ result_length = strlen (result);
+ buffer_free (&buffer);
+ }
+
+ if (offset >= result_length)
+ {
+ /* We're out of data. */
+ free (result);
+ result = NULL;
+ result_length = 0;
+ return 0;
+ }
+
+ if (length > result_length - offset)
+ length = result_length - offset;
+
+ memcpy (readbuf, result + offset, length);
+
+ return length;
+
+}
+
+/* Table used by the crc32 function to calcuate the checksum. */
+
+static unsigned int crc32_table[256] =
+{0, 0};
+
+/* 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)
+{
+ if (!crc32_table[1])
+ {
+ /* Initialize the CRC table and the decoding table. */
+ int i, j;
+ unsigned int c;
+
+ for (i = 0; i < 256; i++)
+ {
+ for (c = i << 24, j = 8; j > 0; --j)
+ c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+ crc32_table[i] = c;
+ }
+ }
+
+ 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 = (crc << 8) ^ crc32_table[((crc >> 24) ^ byte) & 255];
+ base++;
+ }
+ return (unsigned long long) crc;
+}
+
/* Handle all of the extended 'q' packets. */
void
handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
static struct inferior_list_entry *thread_ptr;
/* Reply the current thread id. */
- if (strcmp ("qC", own_buf) == 0)
+ if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
{
+ ptid_t gdb_id;
require_running (own_buf);
- thread_ptr = all_threads.head;
- sprintf (own_buf, "QC%x",
- thread_to_gdb_id ((struct thread_info *)thread_ptr));
+
+ if (!ptid_equal (general_thread, null_ptid)
+ && !ptid_equal (general_thread, minus_one_ptid))
+ gdb_id = general_thread;
+ else
+ {
+ thread_ptr = all_threads.head;
+ gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr);
+ }
+
+ sprintf (own_buf, "QC");
+ own_buf += 2;
+ own_buf = write_ptid (own_buf, gdb_id);
return;
}
if (strcmp ("qSymbol::", own_buf) == 0)
{
+ /* GDB is suggesting new symbols have been loaded. This may
+ mean a new shared library has been detected as loaded, so
+ take the opportunity to check if breakpoints we think are
+ inserted, still are. Note that it isn't guaranteed that
+ we'll see this when a shared library is loaded, and nor will
+ we see this for unloads (although breakpoints in unloaded
+ libraries shouldn't trigger), as GDB may not find symbols for
+ the library at all. We also re-validate breakpoints when we
+ see a second GDB breakpoint for the same address, and or when
+ we access breakpoint shadows. */
+ validate_breakpoints ();
+
if (target_running () && the_target->look_up_symbols != NULL)
(*the_target->look_up_symbols) ();
return;
}
- if (strcmp ("qfThreadInfo", own_buf) == 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;
- }
-
- if (strcmp ("qsThreadInfo", own_buf) == 0)
+ if (!disable_packet_qfThreadInfo)
{
- require_running (own_buf);
- if (thread_ptr != NULL)
+ if (strcmp ("qfThreadInfo", own_buf) == 0)
{
- sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
+ ptid_t gdb_id;
+
+ require_running (own_buf);
+ thread_ptr = all_threads.head;
+
+ *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
+
+ if (strcmp ("qsThreadInfo", own_buf) == 0)
{
- sprintf (own_buf, "l");
- return;
+ 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;
+ }
}
}
(long)text, (long)data, (long)data);
else
write_enn (own_buf);
-
+
return;
}
require_running (own_buf);
strcpy (own_buf, "E00");
if (decode_xfer_read (own_buf + 15, &annex, &ofs, &len) < 0)
- return;
+ return;
if (len > PBUFSIZ - 2)
len = PBUFSIZ - 2;
spu_buf = malloc (len + 1);
if (!spu_buf)
- return;
+ return;
n = (*the_target->qxfer_spu) (annex, spu_buf, NULL, ofs, len + 1);
- if (n < 0)
+ 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);
+ *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;
strcpy (own_buf, "E00");
spu_buf = malloc (packet_len - 15);
if (!spu_buf)
- return;
+ return;
if (decode_xfer_write (own_buf + 16, packet_len - 16, &annex,
&ofs, &len, spu_buf) < 0)
{
return;
}
- n = (*the_target->qxfer_spu)
+ n = (*the_target->qxfer_spu)
(annex, NULL, (unsigned const char *)spu_buf, ofs, len);
if (n < 0)
write_enn (own_buf);
if (len > PBUFSIZ - 2)
len = PBUFSIZ - 2;
data = malloc (len + 1);
+ if (data == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
n = (*the_target->read_auxv) (ofs, data, len + 1);
if (n < 0)
write_enn (own_buf);
require_running (own_buf);
- /* Check for support. */
- document = get_features_xml ("target.xml");
- if (document == NULL)
- {
- own_buf[0] = '\0';
- return;
- }
-
/* Grab the annex, offset, and length. */
if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0)
{
total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name);
document = malloc (total_len);
+ if (document == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
strcpy (document, "<library-list>\n");
p = document + strlen (document);
return;
}
+ if (the_target->qxfer_osdata != NULL
+ && strncmp ("qXfer:osdata:read:", own_buf, 18) == 0)
+ {
+ char *annex;
+ int n;
+ unsigned int len;
+ CORE_ADDR ofs;
+ unsigned char *workbuf;
+
+ strcpy (own_buf, "E00");
+ if (decode_xfer_read (own_buf + 18, &annex, &ofs, &len) < 0)
+ return;
+ if (len > PBUFSIZ - 2)
+ len = PBUFSIZ - 2;
+ workbuf = malloc (len + 1);
+ if (!workbuf)
+ return;
+
+ n = (*the_target->qxfer_osdata) (annex, workbuf, NULL, ofs, len + 1);
+ if (n < 0)
+ write_enn (own_buf);
+ else if (n > len)
+ *new_packet_len_p = write_qxfer_response (own_buf, workbuf, len, 1);
+ else
+ *new_packet_len_p = write_qxfer_response (own_buf, workbuf, n, 0);
+
+ free (workbuf);
+ return;
+ }
+
+ if (the_target->qxfer_siginfo != NULL
+ && strncmp ("qXfer:siginfo:read:", own_buf, 19) == 0)
+ {
+ unsigned char *data;
+ int n;
+ CORE_ADDR ofs;
+ unsigned int len;
+ char *annex;
+
+ require_running (own_buf);
+
+ /* Reject any annex; grab the offset and length. */
+ if (decode_xfer_read (own_buf + 19, &annex, &ofs, &len) < 0
+ || annex[0] != '\0')
+ {
+ strcpy (own_buf, "E00");
+ return;
+ }
+
+ /* Read one extra byte, as an indicator of whether there is
+ more. */
+ if (len > PBUFSIZ - 2)
+ len = PBUFSIZ - 2;
+ data = malloc (len + 1);
+ if (!data)
+ return;
+ n = (*the_target->qxfer_siginfo) (annex, data, NULL, ofs, len + 1);
+ if (n < 0)
+ write_enn (own_buf);
+ else if (n > len)
+ *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
+ else
+ *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
+
+ free (data);
+ return;
+ }
+
+ if (the_target->qxfer_siginfo != NULL
+ && strncmp ("qXfer:siginfo:write:", own_buf, 20) == 0)
+ {
+ char *annex;
+ int n;
+ unsigned int len;
+ CORE_ADDR ofs;
+ unsigned char *data;
+
+ require_running (own_buf);
+
+ strcpy (own_buf, "E00");
+ data = malloc (packet_len - 19);
+ if (!data)
+ return;
+ if (decode_xfer_write (own_buf + 20, packet_len - 20, &annex,
+ &ofs, &len, data) < 0)
+ {
+ free (data);
+ return;
+ }
+
+ n = (*the_target->qxfer_siginfo)
+ (annex, NULL, (unsigned const char *)data, ofs, len);
+ if (n < 0)
+ write_enn (own_buf);
+ else
+ sprintf (own_buf, "%x", n);
+
+ free (data);
+ return;
+ }
+
+ if (strncmp ("qXfer:threads:read:", own_buf, 19) == 0)
+ {
+ unsigned char *data;
+ int n;
+ CORE_ADDR ofs;
+ unsigned int len;
+ char *annex;
+
+ require_running (own_buf);
+
+ /* Reject any annex; grab the offset and length. */
+ if (decode_xfer_read (own_buf + 19, &annex, &ofs, &len) < 0
+ || annex[0] != '\0')
+ {
+ strcpy (own_buf, "E00");
+ return;
+ }
+
+ /* Read one extra byte, as an indicator of whether there is
+ more. */
+ if (len > PBUFSIZ - 2)
+ len = PBUFSIZ - 2;
+ data = malloc (len + 1);
+ if (!data)
+ return;
+ n = handle_threads_qxfer (annex, data, ofs, len + 1);
+ if (n < 0)
+ write_enn (own_buf);
+ else if (n > len)
+ *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
+ else
+ *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
+
+ free (data);
+ return;
+ }
+
/* Protocol features query. */
if (strncmp ("qSupported", own_buf, 10) == 0
&& (own_buf[10] == ':' || own_buf[10] == '\0'))
{
+ char *p = &own_buf[10];
+
+ /* Start processing qSupported packet. */
+ target_process_qsupported (NULL);
+
+ /* Process each feature being provided by GDB. The first
+ feature will follow a ':', and latter features will follow
+ ';'. */
+ if (*p == ':')
+ for (p = strtok (p + 1, ";");
+ p != NULL;
+ p = strtok (NULL, ";"))
+ {
+ if (strcmp (p, "multiprocess+") == 0)
+ {
+ /* GDB supports and wants multi-process support if
+ possible. */
+ if (target_supports_multi_process ())
+ multi_process = 1;
+ }
+ else
+ target_process_qsupported (p);
+ }
+
sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1);
/* We do not have any hook to indicate whether the target backend
if (the_target->qxfer_spu != NULL)
strcat (own_buf, ";qXfer:spu:read+;qXfer:spu:write+");
- if (get_features_xml ("target.xml") != NULL)
- strcat (own_buf, ";qXfer:features:read+");
+ if (the_target->qxfer_siginfo != NULL)
+ strcat (own_buf, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
+
+ /* We always report qXfer:features:read, as targets may
+ install XML files on a subsequent call to arch_setup.
+ If we reported to GDB on startup that we don't support
+ qXfer:feature:read at all, we will never be re-queried. */
+ strcat (own_buf, ";qXfer:features:read+");
+
+ if (transport_is_reliable)
+ strcat (own_buf, ";QStartNoAckMode+");
+
+ if (the_target->qxfer_osdata != NULL)
+ strcat (own_buf, ";qXfer:osdata:read+");
+
+ if (target_supports_multi_process ())
+ strcat (own_buf, ";multiprocess+");
+
+ if (target_supports_non_stop ())
+ strcat (own_buf, ";QNonStop+");
+
+ strcat (own_buf, ";qXfer:threads:read+");
+
+ if (target_supports_tracepoints ())
+ {
+ strcat (own_buf, ";ConditionalTracepoints+");
+ strcat (own_buf, ";TraceStateVariables+");
+ strcat (own_buf, ";TracepointSource+");
+ strcat (own_buf, ";DisconnectedTracing+");
+ }
return;
}
&& strncmp ("qGetTLSAddr:", own_buf, 12) == 0)
{
char *p = own_buf + 12;
- CORE_ADDR parts[3], address = 0;
+ CORE_ADDR parts[2], address = 0;
int i, err;
+ ptid_t ptid = null_ptid;
require_running (own_buf);
p2 = NULL;
}
- decode_address (&parts[i], p, len);
+ if (i == 0)
+ ptid = read_ptid (p, NULL);
+ else
+ decode_address (&parts[i - 1], p, len);
p = p2;
}
err = 1;
else
{
- struct thread_info *thread = gdb_id_to_thread (parts[0]);
+ struct thread_info *thread = find_thread_ptid (ptid);
if (thread == NULL)
err = 2;
else
- err = the_target->get_tls_address (thread, parts[1], parts[2],
+ err = the_target->get_tls_address (thread, parts[0], parts[1],
&address);
}
/* Otherwise, pretend we do not understand this packet. */
}
+ /* Windows OS Thread Information Block address support. */
+ if (the_target->get_tib_address != NULL
+ && strncmp ("qGetTIBAddr:", own_buf, 12) == 0)
+ {
+ char *annex;
+ int n;
+ CORE_ADDR tlb;
+ ptid_t ptid = read_ptid (own_buf + 12, &annex);
+
+ n = (*the_target->get_tib_address) (ptid, &tlb);
+ if (n == 1)
+ {
+ sprintf (own_buf, "%llx", tlb);
+ return;
+ }
+ else if (n == 0)
+ {
+ write_enn (own_buf);
+ return;
+ }
+ return;
+ }
+
/* Handle "monitor" commands. */
if (strncmp ("qRcmd,", own_buf, 6) == 0)
{
char *mon = malloc (PBUFSIZ);
int len = strlen (own_buf + 6);
+ if (mon == NULL)
+ {
+ write_enn (own_buf);
+ return;
+ }
+
if ((len % 2) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2)
{
write_enn (own_buf);
write_ok (own_buf);
- if (strcmp (mon, "set debug 1") == 0)
+ if (the_target->handle_monitor_command == NULL
+ || (*the_target->handle_monitor_command) (mon) == 0)
+ /* Default processing. */
+ handle_monitor_command (mon);
+
+ free (mon);
+ return;
+ }
+
+ if (strncmp ("qSearch:memory:", own_buf, sizeof ("qSearch:memory:") - 1) == 0)
+ {
+ require_running (own_buf);
+ handle_search_memory (own_buf, packet_len);
+ return;
+ }
+
+ if (strcmp (own_buf, "qAttached") == 0
+ || strncmp (own_buf, "qAttached:", sizeof ("qAttached:") - 1) == 0)
+ {
+ struct process_info *process;
+
+ if (own_buf[sizeof ("qAttached") - 1])
{
- debug_threads = 1;
- monitor_output ("Debug output enabled.\n");
+ int pid = strtoul (own_buf + sizeof ("qAttached:") - 1, NULL, 16);
+ process = (struct process_info *)
+ find_inferior_id (&all_processes, pid_to_ptid (pid));
}
- else if (strcmp (mon, "set debug 0") == 0)
+ else
{
- debug_threads = 0;
- monitor_output ("Debug output disabled.\n");
+ require_running (own_buf);
+ process = current_process ();
}
- else if (strcmp (mon, "set remote-debug 1") == 0)
+
+ if (process == NULL)
{
- remote_debug = 1;
- monitor_output ("Protocol debug output enabled.\n");
+ write_enn (own_buf);
+ return;
}
- else if (strcmp (mon, "set remote-debug 0") == 0)
+
+ strcpy (own_buf, process->attached ? "1" : "0");
+ return;
+ }
+
+ if (strncmp ("qCRC:", own_buf, 5) == 0)
+ {
+ /* CRC check (compare-section). */
+ char *comma;
+ CORE_ADDR base;
+ int len;
+ unsigned long long crc;
+
+ require_running (own_buf);
+ base = strtoul (own_buf + 5, &comma, 16);
+ if (*comma++ != ',')
{
- remote_debug = 0;
- monitor_output ("Protocol debug output disabled.\n");
+ write_enn (own_buf);
+ return;
}
- else if (strcmp (mon, "help") == 0)
- monitor_show_help ();
- else if (strcmp (mon, "exit") == 0)
- exit_requested = 1;
- else
+ len = strtoul (comma, NULL, 16);
+ crc = crc32 (base, len, 0xffffffff);
+ /* Check for memory failure. */
+ if (crc == (unsigned long long) -1)
{
- monitor_output ("Unknown monitor command.\n\n");
- monitor_show_help ();
write_enn (own_buf);
+ return;
}
-
- free (mon);
+ sprintf (own_buf, "C%lx", (unsigned long) crc);
return;
}
+ if (target_supports_tracepoints () && handle_tracepoint_query (own_buf))
+ return;
+
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
/* Parse vCont packets. */
void
-handle_v_cont (char *own_buf, char *status, int *signal)
+handle_v_cont (char *own_buf)
{
char *p, *q;
int n = 0, i = 0;
- struct thread_resume *resume_info, default_action;
+ 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++;
p = strchr (p, ';');
}
- /* Allocate room for one extra action, for the default remain-stopped
- behavior; if no default action is in the list, we'll need the extra
- slot. */
- resume_info = malloc ((n + 1) * sizeof (resume_info[0]));
- default_action.thread = -1;
- default_action.leave_stopped = 1;
- default_action.step = 0;
- default_action.sig = 0;
+ resume_info = malloc (n * sizeof (resume_info[0]));
+ if (resume_info == NULL)
+ goto err;
p = &own_buf[5];
- i = 0;
while (*p)
{
p++;
- resume_info[i].leave_stopped = 0;
-
if (p[0] == 's' || p[0] == 'S')
- resume_info[i].step = 1;
+ resume_info[i].kind = resume_step;
else if (p[0] == 'c' || p[0] == 'C')
- resume_info[i].step = 0;
+ resume_info[i].kind = resume_continue;
+ else if (p[0] == 't')
+ resume_info[i].kind = resume_stop;
else
goto err;
if (p[0] == 0)
{
- resume_info[i].thread = -1;
+ resume_info[i].thread = minus_one_ptid;
default_action = resume_info[i];
/* Note: we don't increment i here, we'll overwrite this entry
}
else if (p[0] == ':')
{
- unsigned int gdb_id = strtoul (p + 1, &q, 16);
- unsigned long thread_id;
+ ptid_t ptid = read_ptid (p + 1, &q);
if (p == q)
goto err;
if (p[0] != ';' && p[0] != 0)
goto err;
- thread_id = gdb_id_to_thread_id (gdb_id);
- if (thread_id)
- resume_info[i].thread = thread_id;
- else
- goto err;
+ resume_info[i].thread = ptid;
i++;
}
}
- resume_info[i] = default_action;
+ if (i < n)
+ resume_info[i] = default_action;
/* Still used in occasional places in the backend. */
- if (n == 1 && resume_info[0].thread != -1)
+ if (n == 1
+ && !ptid_equal (resume_info[0].thread, minus_one_ptid)
+ && resume_info[0].kind != resume_stop)
cont_thread = resume_info[0].thread;
else
- cont_thread = -1;
+ cont_thread = minus_one_ptid;
set_desired_inferior (0);
- enable_async_io ();
- (*the_target->resume) (resume_info);
+ if (!non_stop)
+ enable_async_io ();
+
+ (*the_target->resume) (resume_info, n);
free (resume_info);
- *signal = mywait (status, 1);
- prepare_resume_reply (own_buf, *status, *signal);
- disable_async_io ();
+ if (non_stop)
+ write_ok (own_buf);
+ else
+ {
+ last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ disable_async_io ();
+ }
return;
err:
/* Attach to a new program. Return 1 if successful, 0 if failure. */
int
-handle_v_attach (char *own_buf, char *status, int *signal)
+handle_v_attach (char *own_buf)
{
int pid;
pid = strtol (own_buf + 8, NULL, 16);
- if (pid != 0 && attach_inferior (pid, status, signal) == 0)
+ if (pid != 0 && attach_inferior (pid) == 0)
{
- prepare_resume_reply (own_buf, *status, *signal);
+ /* 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
/* Run a new program. Return 1 if successful, 0 if failure. */
static int
-handle_v_run (char *own_buf, char *status, int *signal)
+handle_v_run (char *own_buf)
{
- char *p, **pp, *next_p, **new_argv;
+ char *p, *next_p, **new_argv;
int i, new_argc;
new_argc = 0;
new_argc++;
}
- new_argv = malloc ((new_argc + 2) * sizeof (char *));
+ new_argv = calloc (new_argc + 2, sizeof (char *));
+ if (new_argv == NULL)
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+
i = 0;
for (p = own_buf + strlen ("vRun;"); *p; p = next_p)
{
new_argv[i] = NULL;
else
{
- new_argv[i] = malloc (1 + (next_p - p) / 2);
+ /* FIXME: Fail request if out of memory instead of dying. */
+ new_argv[i] = xmalloc (1 + (next_p - p) / 2);
unhexify (new_argv[i], p, (next_p - p) / 2);
new_argv[i][(next_p - p) / 2] = '\0';
}
if (new_argv[0] == NULL)
{
+ /* GDB didn't specify a program to run. Use the program from the
+ last run with the new argument list. */
+
if (program_argv == NULL)
{
+ /* FIXME: new_argv memory leak */
write_enn (own_buf);
return 0;
}
new_argv[0] = strdup (program_argv[0]);
+ if (new_argv[0] == NULL)
+ {
+ /* FIXME: new_argv memory leak */
+ write_enn (own_buf);
+ return 0;
+ }
}
- /* Free the old argv. */
- if (program_argv)
+ /* 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)
{
- for (pp = program_argv; *pp != NULL; pp++)
- free (*pp);
- free (program_argv);
+ 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;
}
- program_argv = new_argv;
+ else
+ {
+ write_enn (own_buf);
+ return 0;
+ }
+}
- *signal = start_inferior (program_argv, status);
- if (*status == 'T')
+/* Kill process. Return 1 if successful, 0 if failure. */
+int
+handle_v_kill (char *own_buf)
+{
+ int pid;
+ char *p = &own_buf[6];
+ if (multi_process)
+ pid = strtol (p, NULL, 16);
+ else
+ pid = signal_pid;
+ if (pid != 0 && kill_inferior (pid) == 0)
{
- prepare_resume_reply (own_buf, *status, *signal);
+ last_status.kind = TARGET_WAITKIND_SIGNALLED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ last_ptid = pid_to_ptid (pid);
+ discard_queued_stop_replies (pid);
+ write_ok (own_buf);
return 1;
}
else
}
}
-/* 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)
+/* Handle a 'vStopped' packet. */
+static void
+handle_v_stopped (char *own_buf)
{
- if (strncmp (own_buf, "vCont;", 6) == 0)
+ /* If we're waiting for GDB to acknowledge a pending stop reply,
+ consider that done. */
+ if (notif_queue)
{
- require_running (own_buf);
- handle_v_cont (own_buf, status, signal);
- return;
+ struct vstop_notif *head;
+
+ if (remote_debug)
+ fprintf (stderr, "vStopped: acking %s\n",
+ target_pid_to_str (notif_queue->ptid));
+
+ head = notif_queue;
+ notif_queue = notif_queue->next;
+ free (head);
}
- if (strncmp (own_buf, "vCont?", 6) == 0)
+ /* Push another stop reply, or if there are no more left, an OK. */
+ send_next_stop_reply (own_buf);
+}
+
+/* Handle all of the extended 'v' packets. */
+void
+handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
+{
+ if (!disable_packet_vCont)
{
- strcpy (own_buf, "vCont;c;C;s;S");
- return;
+ if (strncmp (own_buf, "vCont;", 6) == 0)
+ {
+ require_running (own_buf);
+ handle_v_cont (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "vCont?", 6) == 0)
+ {
+ strcpy (own_buf, "vCont;c;C;s;S;t");
+ return;
+ }
}
if (strncmp (own_buf, "vFile:", 6) == 0
if (strncmp (own_buf, "vAttach;", 8) == 0)
{
- if (target_running ())
+ if (!multi_process && target_running ())
{
fprintf (stderr, "Already debugging a process\n");
write_enn (own_buf);
return;
}
- handle_v_attach (own_buf, status, signal);
+ handle_v_attach (own_buf);
return;
}
if (strncmp (own_buf, "vRun;", 5) == 0)
{
- if (target_running ())
+ if (!multi_process && target_running ())
{
fprintf (stderr, "Already debugging a process\n");
write_enn (own_buf);
return;
}
- handle_v_run (own_buf, status, signal);
+ handle_v_run (own_buf);
return;
}
- /* Otherwise we didn't know what packet it was. Say we didn't
- understand it. */
- own_buf[0] = 0;
- return;
-}
-
-void
-myresume (char *own_buf, int step, int *signalp, char *statusp)
-{
- struct thread_resume resume_info[2];
- int n = 0;
- int sig = *signalp;
+ if (strncmp (own_buf, "vKill;", 6) == 0)
+ {
+ if (!target_running ())
+ {
+ fprintf (stderr, "No process to kill\n");
+ write_enn (own_buf);
+ return;
+ }
+ handle_v_kill (own_buf);
+ return;
+ }
+
+ if (strncmp (own_buf, "vStopped", 8) == 0)
+ {
+ handle_v_stopped (own_buf);
+ return;
+ }
+
+ /* Otherwise we didn't know what packet it was. Say we didn't
+ understand it. */
+ own_buf[0] = 0;
+ return;
+}
+
+/* Resume inferior and wait for another event. In non-stop mode,
+ don't really wait here, but return immediatelly to the event
+ loop. */
+void
+myresume (char *own_buf, int step, int sig)
+{
+ struct thread_resume resume_info[2];
+ int n = 0;
+ int valid_cont_thread;
set_desired_inferior (0);
- if (step || sig || (cont_thread != 0 && cont_thread != -1))
+ valid_cont_thread = (!ptid_equal (cont_thread, null_ptid)
+ && !ptid_equal (cont_thread, minus_one_ptid));
+
+ if (step || sig || valid_cont_thread)
{
resume_info[0].thread
= ((struct inferior_list_entry *) current_inferior)->id;
- resume_info[0].step = step;
+ if (step)
+ resume_info[0].kind = resume_step;
+ else
+ resume_info[0].kind = resume_continue;
resume_info[0].sig = sig;
- resume_info[0].leave_stopped = 0;
n++;
}
- resume_info[n].thread = -1;
- resume_info[n].step = 0;
- resume_info[n].sig = 0;
- resume_info[n].leave_stopped = (cont_thread != 0 && cont_thread != -1);
- enable_async_io ();
- (*the_target->resume) (resume_info);
- *signalp = mywait (statusp, 1);
- prepare_resume_reply (own_buf, *statusp, *signalp);
- disable_async_io ();
+ if (!valid_cont_thread)
+ {
+ resume_info[n].thread = minus_one_ptid;
+ resume_info[n].kind = resume_continue;
+ resume_info[n].sig = 0;
+ n++;
+ }
+
+ if (!non_stop)
+ enable_async_io ();
+
+ (*the_target->resume) (resume_info, n);
+
+ if (non_stop)
+ write_ok (own_buf);
+ else
+ {
+ last_ptid = mywait (minus_one_ptid, &last_status, 0, 1);
+ prepare_resume_reply (own_buf, last_ptid, &last_status);
+ disable_async_io ();
+ }
+}
+
+/* Callback for for_each_inferior. Make a new stop reply for each
+ stopped thread. */
+
+static int
+queue_stop_reply_callback (struct inferior_list_entry *entry, void *arg)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ /* For now, assume targets that don't have this callback also don't
+ manage the thread's last_status field. */
+ if (the_target->thread_stopped == NULL)
+ {
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_STOPPED;
+ status.value.sig = TARGET_SIGNAL_TRAP;
+
+ /* Pass the last stop reply back to GDB, but don't notify
+ yet. */
+ queue_stop_reply (entry->id, &thread->last_status);
+ }
+ else
+ {
+ if (thread_stopped (thread))
+ {
+ if (debug_threads)
+ fprintf (stderr, "Reporting thread %s as already stopped with %s\n",
+ target_pid_to_str (entry->id),
+ target_waitstatus_to_string (&thread->last_status));
+
+ /* Pass the last stop reply back to GDB, but don't notify
+ yet. */
+ queue_stop_reply (entry->id, &thread->last_status);
+ }
+ }
+
+ return 0;
+}
+
+/* Set this inferior LWP's state as "want-stopped". We won't resume
+ this LWP until the client gives us another action for it. */
+
+static void
+gdb_wants_thread_stopped (struct inferior_list_entry *entry)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+
+ thread->last_resume_kind = resume_stop;
+
+ if (thread->last_status.kind == TARGET_WAITKIND_IGNORE)
+ {
+ thread->last_status.kind = TARGET_WAITKIND_STOPPED;
+ thread->last_status.value.sig = TARGET_SIGNAL_0;
+ }
+}
+
+/* Set all threads' states as "want-stopped". */
+
+static void
+gdb_wants_all_threads_stopped (void)
+{
+ for_each_inferior (&all_threads, gdb_wants_thread_stopped);
+}
+
+/* Clear the gdb_detached flag of every process. */
+
+static void
+gdb_reattached_process (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ process->gdb_detached = 0;
+}
+
+/* Status handler for the '?' packet. */
+
+static void
+handle_status (char *own_buf)
+{
+ /* GDB is connected, don't forward events to the target anymore. */
+ for_each_inferior (&all_processes, gdb_reattached_process);
+
+ /* In non-stop mode, we must send a stop reply for each stopped
+ thread. In all-stop mode, just send one for the first stopped
+ thread we find. */
+
+ if (non_stop)
+ {
+ discard_queued_stop_replies (-1);
+ find_inferior (&all_threads, queue_stop_reply_callback, NULL);
+
+ /* The first is sent immediatly. OK is sent if there is no
+ stopped thread, which is the same handling of the vStopped
+ packet (by design). */
+ send_next_stop_reply (own_buf);
+ }
+ else
+ {
+ pause_all ();
+ gdb_wants_all_threads_stopped ();
+
+ if (all_threads.head)
+ {
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_STOPPED;
+ status.value.sig = TARGET_SIGNAL_TRAP;
+ prepare_resume_reply (own_buf,
+ all_threads.head->id, &status);
+ }
+ else
+ strcpy (own_buf, "W00");
+ }
}
static void
gdbserver_version (void)
{
- printf ("GNU gdbserver %s\n"
- "Copyright (C) 2007 Free Software Foundation, Inc.\n"
+ printf ("GNU gdbserver %s%s\n"
+ "Copyright (C) 2010 Free Software Foundation, Inc.\n"
"gdbserver is free software, covered by the GNU General Public License.\n"
"This gdbserver was configured as \"%s\"\n",
- version, host_name);
+ PKGVERSION, version, host_name);
}
static void
-gdbserver_usage (void)
+gdbserver_usage (FILE *stream)
{
- printf ("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"
- " --wrapper WRAPPER --\tRun WRAPPER to start new programs.\n");
+ fprintf (stream, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
+ "\tgdbserver [OPTIONS] --attach COMM PID\n"
+ "\tgdbserver [OPTIONS] --multi COMM\n"
+ "\n"
+ "COMM may either be a tty device (for serial debugging), or \n"
+ "HOST:PORT to listen for a TCP connection.\n"
+ "\n"
+ "Options:\n"
+ " --debug Enable general debugging output.\n"
+ " --remote-debug Enable remote protocol debugging output.\n"
+ " --version Display version information and exit.\n"
+ " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n");
+ if (REPORT_BUGS_TO[0] && stream == stdout)
+ fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
}
+static void
+gdbserver_show_disableable (FILE *stream)
+{
+ fprintf (stream, "Disableable packets:\n"
+ " vCont \tAll vCont packets\n"
+ " qC \tQuerying the current thread\n"
+ " qfThreadInfo\tThread listing\n"
+ " Tthread \tPassing the thread specifier in the T stop reply packet\n"
+ " threads \tAll of the above\n");
+}
+
+
#undef require_running
#define require_running(BUF) \
if (!target_running ()) \
break; \
}
+static int
+first_thread_of (struct inferior_list_entry *entry, void *args)
+{
+ int pid = * (int *) args;
+
+ if (ptid_get_pid (entry->id) == pid)
+ return 1;
+
+ return 0;
+}
+
+static void
+kill_inferior_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+ int pid = ptid_get_pid (process->head.id);
+
+ kill_inferior (pid);
+ discard_queued_stop_replies (pid);
+}
+
+/* Callback for for_each_inferior to detach or kill the inferior,
+ depending on whether we attached to it or not.
+ We inform the user whether we're detaching or killing the process
+ as this is only called when gdbserver is about to exit. */
+
+static void
+detach_or_kill_inferior_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+ int pid = ptid_get_pid (process->head.id);
+
+ if (process->attached)
+ detach_inferior (pid);
+ else
+ kill_inferior (pid);
+
+ discard_queued_stop_replies (pid);
+}
+
+/* for_each_inferior callback for detach_or_kill_for_exit to print
+ the pids of started inferiors. */
+
+static void
+print_started_pid (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ if (! process->attached)
+ {
+ int pid = ptid_get_pid (process->head.id);
+ fprintf (stderr, " %d", pid);
+ }
+}
+
+/* for_each_inferior callback for detach_or_kill_for_exit to print
+ the pids of attached inferiors. */
+
+static void
+print_attached_pid (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ if (process->attached)
+ {
+ int pid = ptid_get_pid (process->head.id);
+ fprintf (stderr, " %d", pid);
+ }
+}
+
+/* Call this when exiting gdbserver with possible inferiors that need
+ to be killed or detached from. */
+
+static void
+detach_or_kill_for_exit (void)
+{
+ /* First print a list of the inferiors we will be killing/detaching.
+ This is to assist the user, for example, in case the inferior unexpectedly
+ dies after we exit: did we screw up or did the inferior exit on its own?
+ Having this info will save some head-scratching. */
+
+ if (have_started_inferiors_p ())
+ {
+ fprintf (stderr, "Killing process(es):");
+ for_each_inferior (&all_processes, print_started_pid);
+ fprintf (stderr, "\n");
+ }
+ if (have_attached_inferiors_p ())
+ {
+ fprintf (stderr, "Detaching process(es):");
+ for_each_inferior (&all_processes, print_attached_pid);
+ fprintf (stderr, "\n");
+ }
+
+ /* Now we can kill or detach the inferiors. */
+
+ for_each_inferior (&all_processes, detach_or_kill_inferior_callback);
+}
+
+static void
+join_inferiors_callback (struct inferior_list_entry *entry)
+{
+ struct process_info *process = (struct process_info *) entry;
+
+ /* If we are attached, then we can exit. Otherwise, we need to hang
+ around doing nothing, until the child is gone. */
+ if (!process->attached)
+ join_inferior (ptid_get_pid (process->head.id));
+}
+
int
main (int argc, char *argv[])
{
- 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;
}
else if (strcmp (*next_arg, "--help") == 0)
{
- gdbserver_usage ();
+ gdbserver_usage (stdout);
exit (0);
}
else if (strcmp (*next_arg, "--attach") == 0)
if (next_arg == wrapper_argv || *next_arg == NULL)
{
- gdbserver_usage ();
+ gdbserver_usage (stderr);
exit (1);
}
}
else if (strcmp (*next_arg, "--debug") == 0)
debug_threads = 1;
+ else if (strcmp (*next_arg, "--remote-debug") == 0)
+ remote_debug = 1;
+ else if (strcmp (*next_arg, "--disable-packet") == 0)
+ {
+ gdbserver_show_disableable (stdout);
+ exit (0);
+ }
+ else if (strncmp (*next_arg,
+ "--disable-packet=",
+ sizeof ("--disable-packet=") - 1) == 0)
+ {
+ char *packets, *tok;
+
+ packets = *next_arg += sizeof ("--disable-packet=") - 1;
+ for (tok = strtok (packets, ",");
+ tok != NULL;
+ tok = strtok (NULL, ","))
+ {
+ if (strcmp ("vCont", tok) == 0)
+ disable_packet_vCont = 1;
+ else if (strcmp ("Tthread", tok) == 0)
+ disable_packet_Tthread = 1;
+ else if (strcmp ("qC", tok) == 0)
+ disable_packet_qC = 1;
+ else if (strcmp ("qfThreadInfo", tok) == 0)
+ disable_packet_qfThreadInfo = 1;
+ else if (strcmp ("threads", tok) == 0)
+ {
+ disable_packet_vCont = 1;
+ disable_packet_Tthread = 1;
+ disable_packet_qC = 1;
+ disable_packet_qfThreadInfo = 1;
+ }
+ else
+ {
+ fprintf (stderr, "Don't know how to disable \"%s\".\n\n",
+ tok);
+ gdbserver_show_disableable (stderr);
+ exit (1);
+ }
+ }
+ }
else
{
fprintf (stderr, "Unknown argument: %s\n", *next_arg);
next_arg++;
if (port == NULL || (!attach && !multi_mode && *next_arg == NULL))
{
- gdbserver_usage ();
+ gdbserver_usage (stderr);
exit (1);
}
if (bad_attach)
{
- gdbserver_usage ();
+ gdbserver_usage (stderr);
exit (1);
}
+ initialize_inferiors ();
initialize_async_io ();
initialize_low ();
+ if (target_supports_tracepoints ())
+ initialize_tracepoint ();
- own_buf = malloc (PBUFSIZ + 1);
- mem_buf = malloc (PBUFSIZ);
+ own_buf = xmalloc (PBUFSIZ + 1);
+ mem_buf = xmalloc (PBUFSIZ);
if (pid == 0 && *next_arg != NULL)
{
int i, n;
n = argc - (next_arg - argv);
- program_argv = malloc (sizeof (char *) * (n + 1));
+ program_argv = xmalloc (sizeof (char *) * (n + 1));
for (i = 0; i < n; i++)
- program_argv[i] = strdup (next_arg[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
{
- status = 'W';
- signal = 0;
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.integer = 0;
+ last_ptid = minus_one_ptid;
}
/* Don't report shared library events on the initial connection,
if (setjmp (toplevel))
{
- fprintf (stderr, "Killing inferior\n");
- kill_inferior ();
+ detach_or_kill_for_exit ();
exit (1);
}
- if (status == 'W' || status == 'X')
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
was_running = 0;
else
was_running = 1;
while (1)
{
+ noack_mode = 0;
+ multi_process = 0;
+ /* Be sure we're out of tfind mode. */
+ current_traceframe = -1;
+
remote_open (port);
- restart:
if (setjmp (toplevel) != 0)
{
/* An error occurred. */
}
}
- disable_async_io ();
- while (!exit_requested)
+ /* 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. The only other way to get here is for
+ getpkt to fail; close the connection and reopen it at the
+ top of the loop. */
+
+ if (exit_requested)
{
- unsigned char sig;
- int packet_len;
- int new_packet_len = -1;
+ detach_or_kill_for_exit ();
+ exit (0);
+ }
- response_needed = 0;
- packet_len = getpkt (own_buf);
- if (packet_len <= 0)
- break;
- response_needed = 1;
+ fprintf (stderr,
+ "Remote side has terminated connection. "
+ "GDBserver will reopen the connection.\n");
- i = 0;
- ch = own_buf[i++];
- switch (ch)
+ if (tracing)
+ {
+ if (disconnected_tracing)
{
- 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
+ /* 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)
{
- write_ok (own_buf);
-
- if (extended_protocol)
- {
- /* Treat this like a normal program exit. */
- signal = 0;
- status = 'W';
- }
- 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 ();
-
- 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);
- 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;
- }
- }
-
- if (own_buf[1] == 'g')
- {
- general_thread = thread_id;
- set_desired_inferior (1);
- }
- else if (own_buf[1] == 'c')
- cont_thread = thread_id;
- else if (own_buf[1] == 's')
- step_thread = thread_id;
-
- write_ok (own_buf);
- }
- else
- {
- /* Silently ignore it so that gdb can extend the protocol
- without compatibility headaches. */
- own_buf[0] = '\0';
+ if (start_non_stop (1))
+ non_stop = 1;
+
+ /* Detaching implicitly resumes all threads; simply
+ disconnecting does not. */
}
+ }
+ else
+ {
+ fprintf (stderr,
+ "Disconnected tracing disabled; stopping trace run.\n");
+ stop_tracing ();
+ }
+ }
+ }
+}
+
+/* Event loop callback that handles a serial event. The first byte in
+ the serial buffer gets us here. We expect characters to arrive at
+ a brisk pace, so we read the rest of the packet with a blocking
+ getpkt call. */
+
+static int
+process_serial_event (void)
+{
+ char ch;
+ int i = 0;
+ int signal;
+ unsigned int len;
+ CORE_ADDR mem_addr;
+ int pid;
+ unsigned char sig;
+ int packet_len;
+ int new_packet_len = -1;
+
+ /* Used to decide when gdbserver should exit in
+ multi-mode/remote. */
+ static int have_ran = 0;
+
+ if (!have_ran)
+ have_ran = target_running ();
+
+ disable_async_io ();
+
+ response_needed = 0;
+ packet_len = getpkt (own_buf);
+ if (packet_len <= 0)
+ {
+ remote_close ();
+ /* Force an event loop break. */
+ return -1;
+ }
+ response_needed = 1;
+
+ i = 0;
+ ch = own_buf[i++];
+ switch (ch)
+ {
+ case 'q':
+ handle_query (own_buf, packet_len, &new_packet_len);
+ break;
+ case 'Q':
+ handle_general_set (own_buf);
+ break;
+ case 'D':
+ require_running (own_buf);
+
+ if (multi_process)
+ {
+ i++; /* skip ';' */
+ pid = strtol (&own_buf[i], NULL, 16);
+ }
+ else
+ pid =
+ ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id);
+
+ if (tracing && disconnected_tracing)
+ {
+ struct thread_resume resume_info;
+ struct process_info *process = find_process_pid (pid);
+
+ if (process == NULL)
+ {
+ write_enn (own_buf);
break;
- 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
+ }
+
+ fprintf (stderr,
+ "Disconnected tracing in effect, "
+ "leaving gdbserver attached to the process\n");
+
+ /* Make sure we're in non-stop/async mode, so we we can both
+ wait for an async socket accept, and handle async target
+ events simultaneously. There's also no point either in
+ having the target stop all threads, when we're going to
+ pass signals down without informing GDB. */
+ if (!non_stop)
+ {
+ if (debug_threads)
+ fprintf (stderr, "Forcing non-stop mode\n");
+
+ non_stop = 1;
+ start_non_stop (1);
+ }
+
+ process->gdb_detached = 1;
+
+ /* Detaching implicitly resumes all threads. */
+ resume_info.thread = minus_one_ptid;
+ resume_info.kind = resume_continue;
+ resume_info.sig = 0;
+ (*the_target->resume) (&resume_info, 1);
+
+ write_ok (own_buf);
+ break; /* from switch/case */
+ }
+
+ fprintf (stderr, "Detaching from process %d\n", pid);
+ stop_tracing ();
+ if (detach_inferior (pid) != 0)
+ write_enn (own_buf);
+ else
+ {
+ discard_queued_stop_replies (pid);
+ write_ok (own_buf);
+
+ if (extended_protocol)
+ {
+ /* Treat this like a normal program exit. */
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.integer = 0;
+ last_ptid = pid_to_ptid (pid);
+
+ current_inferior = NULL;
+ }
+ else
+ {
+ putpkt (own_buf);
+ remote_close ();
+
+ /* If we are attached, then we can exit. Otherwise, we
+ need to hang around doing nothing, until the child is
+ gone. */
+ for_each_inferior (&all_processes,
+ join_inferiors_callback);
+ exit (0);
+ }
+ }
+ break;
+ case '!':
+ extended_protocol = 1;
+ write_ok (own_buf);
+ break;
+ case '?':
+ handle_status (own_buf);
+ break;
+ case 'H':
+ if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
+ {
+ ptid_t gdb_id, thread_id;
+ int pid;
+
+ require_running (own_buf);
+
+ gdb_id = read_ptid (&own_buf[2], NULL);
+
+ pid = ptid_get_pid (gdb_id);
+
+ 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 = ((struct inferior_list_entry *)thread)->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_id = all_threads.head->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_inferior (1);
}
+ else if (own_buf[1] == 'c')
+ cont_thread = thread_id;
+ else if (own_buf[1] == 's')
+ step_thread = thread_id;
+
+ write_ok (own_buf);
+ }
+ else
+ {
+ /* Silently ignore it so that gdb can extend the protocol
+ without compatibility headaches. */
+ own_buf[0] = '\0';
+ }
+ break;
+ case 'g':
+ require_running (own_buf);
+ if (current_traceframe >= 0)
+ {
+ struct regcache *regcache = new_register_cache ();
- if (new_packet_len != -1)
- putpkt_binary (own_buf, new_packet_len);
+ if (fetch_traceframe_registers (current_traceframe,
+ regcache, -1) == 0)
+ registers_to_string (regcache, own_buf);
else
- putpkt (own_buf);
+ write_enn (own_buf);
+ free_register_cache (regcache);
+ }
+ else
+ {
+ struct regcache *regcache;
- response_needed = 0;
+ set_desired_inferior (1);
+ regcache = get_thread_regcache (current_inferior, 1);
+ registers_to_string (regcache, own_buf);
+ }
+ break;
+ case 'G':
+ require_running (own_buf);
+ if (current_traceframe >= 0)
+ write_enn (own_buf);
+ else
+ {
+ struct regcache *regcache;
- if (was_running && (status == 'W' || status == 'X'))
- {
- was_running = 0;
+ set_desired_inferior (1);
+ regcache = get_thread_regcache (current_inferior, 1);
+ registers_from_string (regcache, &own_buf[1]);
+ write_ok (own_buf);
+ }
+ break;
+ case 'm':
+ require_running (own_buf);
+ decode_m_packet (&own_buf[1], &mem_addr, &len);
+ if (read_memory (mem_addr, mem_buf, len) == 0)
+ convert_int_to_ascii (mem_buf, own_buf, len);
+ else
+ write_enn (own_buf);
+ break;
+ case 'M':
+ require_running (own_buf);
+ decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf);
+ if (write_memory (mem_addr, mem_buf, len) == 0)
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ break;
+ case 'X':
+ require_running (own_buf);
+ if (decode_X_packet (&own_buf[1], packet_len - 1,
+ &mem_addr, &len, mem_buf) < 0
+ || write_memory (mem_addr, mem_buf, len) != 0)
+ write_enn (own_buf);
+ else
+ write_ok (own_buf);
+ break;
+ case 'C':
+ require_running (own_buf);
+ convert_ascii_to_int (own_buf + 1, &sig, 1);
+ if (target_signal_to_host_p (sig))
+ signal = target_signal_to_host (sig);
+ else
+ signal = 0;
+ myresume (own_buf, 0, signal);
+ break;
+ case 'S':
+ require_running (own_buf);
+ convert_ascii_to_int (own_buf + 1, &sig, 1);
+ if (target_signal_to_host_p (sig))
+ signal = target_signal_to_host (sig);
+ else
+ signal = 0;
+ myresume (own_buf, 1, signal);
+ break;
+ case 'c':
+ require_running (own_buf);
+ signal = 0;
+ myresume (own_buf, 0, signal);
+ break;
+ case 's':
+ require_running (own_buf);
+ signal = 0;
+ myresume (own_buf, 1, signal);
+ break;
+ case 'Z': /* insert_ ... */
+ /* Fallthrough. */
+ case 'z': /* remove_ ... */
+ {
+ char *lenptr;
+ char *dataptr;
+ CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
+ int len = strtol (lenptr + 1, &dataptr, 16);
+ char type = own_buf[1];
+ int res;
+ const int insert = ch == 'Z';
+
+ /* Default to unrecognized/unsupported. */
+ res = 1;
+ switch (type)
+ {
+ case '0': /* software-breakpoint */
+ case '1': /* hardware-breakpoint */
+ case '2': /* write watchpoint */
+ case '3': /* read watchpoint */
+ case '4': /* access watchpoint */
+ require_running (own_buf);
+ if (insert && the_target->insert_point != NULL)
+ res = (*the_target->insert_point) (type, addr, len);
+ else if (!insert && the_target->remove_point != NULL)
+ res = (*the_target->remove_point) (type, addr, len);
+ break;
+ default:
+ break;
+ }
- if (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;
- else
- {
- fprintf (stderr, "GDBserver exiting\n");
- exit (0);
- }
- }
+ if (res == 0)
+ write_ok (own_buf);
+ else if (res == 1)
+ /* Unsupported. */
+ own_buf[0] = '\0';
+ else
+ write_enn (own_buf);
+ break;
+ }
+ case 'k':
+ response_needed = 0;
+ if (!target_running ())
+ /* The packet we received doesn't make sense - but we can't
+ reply to it, either. */
+ return 0;
+
+ fprintf (stderr, "Killing all inferiors\n");
+ for_each_inferior (&all_processes, kill_inferior_callback);
+
+ /* When using the extended protocol, we wait with no program
+ running. The traditional protocol will exit instead. */
+ if (extended_protocol)
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ return 0;
+ }
+ else
+ exit (0);
+
+ case 'T':
+ {
+ ptid_t gdb_id, thread_id;
+
+ 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 (status != 'W' && status != 'X')
- was_running = 1;
+ 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)
+ start_inferior (program_argv);
+ else
+ {
+ last_status.kind = TARGET_WAITKIND_EXITED;
+ last_status.value.sig = TARGET_SIGNAL_KILL;
+ }
+ return 0;
}
+ else
+ {
+ /* It is a request we don't understand. Respond with an
+ empty packet so that gdb knows that we don't support this
+ request. */
+ own_buf[0] = '\0';
+ break;
+ }
+ case 'v':
+ /* Extended (long) request. */
+ handle_v_requests (own_buf, packet_len, &new_packet_len);
+ break;
+
+ default:
+ /* It is a request we don't understand. Respond with an empty
+ packet so that gdb knows that we don't support this
+ request. */
+ own_buf[0] = '\0';
+ break;
+ }
- /* If an exit was requested (using the "monitor exit" command),
- terminate now. The only other way to get here is for
- getpkt to fail; close the connection and reopen it at the
- top of the loop. */
+ if (new_packet_len != -1)
+ putpkt_binary (own_buf, new_packet_len);
+ else
+ putpkt (own_buf);
- if (exit_requested)
+ response_needed = 0;
+
+ if (!extended_protocol && have_ran && !target_running ())
+ {
+ /* In non-stop, defer exiting until GDB had a chance to query
+ the whole vStopped list (until it gets an OK). */
+ if (!notif_queue)
{
+ fprintf (stderr, "GDBserver exiting\n");
remote_close ();
- if (attached && target_running ())
- detach_inferior ();
- else if (target_running ())
- kill_inferior ();
exit (0);
}
+ }
+
+ if (exit_requested)
+ return -1;
+
+ return 0;
+}
+
+/* Event-loop callback for serial events. */
+
+int
+handle_serial_event (int err, gdb_client_data client_data)
+{
+ if (debug_threads)
+ fprintf (stderr, "handling possible serial event\n");
+
+ /* Really handle it. */
+ if (process_serial_event () < 0)
+ return -1;
+
+ /* Be sure to not change the selected inferior behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_inferior (1);
+
+ return 0;
+}
+
+/* Event-loop callback for target events. */
+
+int
+handle_target_event (int err, gdb_client_data client_data)
+{
+ if (debug_threads)
+ fprintf (stderr, "handling possible target event\n");
+
+ last_ptid = mywait (minus_one_ptid, &last_status,
+ TARGET_WNOHANG, 1);
+
+ if (last_status.kind != TARGET_WAITKIND_IGNORE)
+ {
+ int pid = ptid_get_pid (last_ptid);
+ struct process_info *process = find_process_pid (pid);
+ int forward_event = !gdb_connected () || process->gdb_detached;
+
+ if (last_status.kind == TARGET_WAITKIND_EXITED
+ || last_status.kind == TARGET_WAITKIND_SIGNALLED)
+ mourn_inferior (process);
+
+ if (forward_event)
+ {
+ if (!target_running ())
+ {
+ /* The last process exited. We're done. */
+ exit (0);
+ }
+
+ if (last_status.kind == TARGET_WAITKIND_STOPPED)
+ {
+ /* A thread stopped with a signal, but gdb isn't
+ connected to handle it. Pass it down to the
+ inferior, as if it wasn't being traced. */
+ struct thread_resume resume_info;
+
+ if (debug_threads)
+ fprintf (stderr,
+ "GDB not connected; forwarding event %d for [%s]\n",
+ (int) last_status.kind,
+ target_pid_to_str (last_ptid));
+
+ resume_info.thread = last_ptid;
+ resume_info.kind = resume_continue;
+ resume_info.sig = last_status.value.sig;
+ (*the_target->resume) (&resume_info, 1);
+ }
+ else if (debug_threads)
+ fprintf (stderr, "GDB not connected; ignoring event %d for [%s]\n",
+ (int) last_status.kind,
+ target_pid_to_str (last_ptid));
+ }
else
{
- fprintf (stderr, "Remote side has terminated connection. "
- "GDBserver will reopen the connection.\n");
- remote_close ();
+ /* Something interesting. Tell GDB about it. */
+ push_event (last_ptid, &last_status);
}
}
+
+ /* Be sure to not change the selected inferior behind GDB's back.
+ Important in the non-stop mode asynchronous protocol. */
+ set_desired_inferior (1);
+
+ return 0;
}