#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
+#if HAVE_MALLOC_H
+#include <malloc.h>
+#endif
unsigned long cont_thread;
unsigned long general_thread;
static int response_needed;
static int exit_requested;
-static char **program_argv;
+static char **program_argv, **wrapper_argv;
/* Enable miscellaneous debugging output. The name is historical - it
was originally used to debug LinuxThreads support. */
jmp_buf toplevel;
+const char *gdbserver_xmltarget;
+
/* The PID of the originally created or attached inferior. Used to
send signals to the process when GDB sends us an asynchronous interrupt
(user hitting Control-C in the client), and to wait for the child to exit
}
#endif
+/* Set if you want to disable optional thread related packets support
+ in gdbserver, for the sake of testing GDB against stubs that don't
+ support them. */
+int disable_packet_vCont;
+int disable_packet_Tthread;
+int disable_packet_qC;
+int disable_packet_qfThreadInfo;
+
static int
target_running (void)
{
}
static int
-start_inferior (char *argv[], char *statusptr)
+start_inferior (char **argv, char *statusptr)
{
+ char **new_argv = argv;
attached = 0;
+ if (wrapper_argv != NULL)
+ {
+ int i, count = 1;
+
+ for (i = 0; wrapper_argv[i] != NULL; i++)
+ count++;
+ for (i = 0; argv[i] != NULL; i++)
+ count++;
+ new_argv = alloca (sizeof (char *) * count);
+ count = 0;
+ for (i = 0; wrapper_argv[i] != NULL; i++)
+ new_argv[count++] = wrapper_argv[i];
+ for (i = 0; argv[i] != NULL; i++)
+ new_argv[count++] = argv[i];
+ new_argv[count] = NULL;
+ }
+
#ifdef SIGTTOU
signal (SIGTTOU, SIG_DFL);
signal (SIGTTIN, SIG_DFL);
#endif
- signal_pid = create_inferior (argv[0], argv);
+ signal_pid = create_inferior (new_argv[0], new_argv);
/* FIXME: we don't actually know at this point that the create
actually succeeded. We won't know that until we wait. */
atexit (restore_old_foreground_pgrp);
#endif
+ if (wrapper_argv != NULL)
+ {
+ struct thread_resume resume_info;
+ int sig;
+
+ resume_info.thread = -1;
+ resume_info.step = 0;
+ resume_info.sig = 0;
+ resume_info.leave_stopped = 0;
+
+ sig = mywait (statusptr, 0);
+ if (*statusptr != 'T')
+ return sig;
+
+ do
+ {
+ (*the_target->resume) (&resume_info);
+
+ sig = mywait (statusptr, 0);
+ if (*statusptr != 'T')
+ return sig;
+ }
+ while (sig != TARGET_SIGNAL_TRAP);
+
+ return sig;
+ }
+
/* Wait till we are at 1st instruction in program, return signal
number (assuming success). */
return mywait (statusptr, 0);
static const char *
get_features_xml (const char *annex)
{
- static int features_supported = -1;
- static char *document;
-
-#ifdef USE_XML
- extern const char *const xml_builtin[][2];
- int i;
+ /* 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".
- /* Look for the annex. */
- for (i = 0; xml_builtin[i][0] != NULL; i++)
- if (strcmp (annex, xml_builtin[i][0]) == 0)
- break;
+ This variable is set up from the auto-generated
+ init_registers_... routine for the current target. */
- if (xml_builtin[i][0] != NULL)
- return xml_builtin[i][1];
-#endif
-
- if (strcmp (annex, "target.xml") != 0)
- return NULL;
-
- if (features_supported == -1)
+ if (gdbserver_xmltarget
+ && strcmp (annex, "target.xml") == 0)
{
- const char *arch = NULL;
- if (the_target->arch_string != NULL)
- arch = (*the_target->arch_string) ();
-
- if (arch == NULL)
- features_supported = 0;
+ if (*gdbserver_xmltarget == '@')
+ return gdbserver_xmltarget + 1;
else
- {
- features_supported = 1;
- document = malloc (64 + strlen (arch));
- snprintf (document, 64 + strlen (arch),
- "<target><architecture>%s</architecture></target>",
- arch);
- }
+ annex = gdbserver_xmltarget;
}
- return document;
+#ifdef USE_XML
+ {
+ extern const char *const xml_builtin[][2];
+ int i;
+
+ /* Look for the annex. */
+ for (i = 0; xml_builtin[i][0] != NULL; i++)
+ if (strcmp (annex, xml_builtin[i][0]) == 0)
+ break;
+
+ if (xml_builtin[i][0] != NULL)
+ return xml_builtin[i][1];
+ }
+#endif
+
+ return NULL;
}
void
monitor_output (" Quit GDBserver\n");
}
+/* 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_inferior_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 + 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_inferior_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 ()) \
{ \
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)
{
require_running (own_buf);
thread_ptr = all_threads.head;
sprintf (own_buf, "QC%x",
- thread_to_gdb_id ((struct thread_info *)thread_ptr));
+ thread_to_gdb_id ((struct thread_info *)thread_ptr));
return;
}
return;
}
- if (strcmp ("qfThreadInfo", own_buf) == 0)
+ if (!disable_packet_qfThreadInfo)
{
- 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)
- {
- require_running (own_buf);
- if (thread_ptr != NULL)
+ 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;
}
- else
+
+ if (strcmp ("qsThreadInfo", own_buf) == 0)
{
- sprintf (own_buf, "l");
- return;
+ 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;
+ }
}
}
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)
{
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+");
+ /* 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+");
return;
}
return;
}
+ if (strncmp ("qSearch:memory:", own_buf, sizeof ("qSearch:memory:") - 1) == 0)
+ {
+ require_running (own_buf);
+ handle_search_memory (own_buf, packet_len);
+ return;
+ }
+
/* Otherwise we didn't know what packet it was. Say we didn't
understand it. */
own_buf[0] = 0;
pid = strtol (own_buf + 8, NULL, 16);
if (pid != 0 && attach_inferior (pid, status, signal) == 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;
}
handle_v_requests (char *own_buf, char *status, int *signal,
int packet_len, int *new_packet_len)
{
- if (strncmp (own_buf, "vCont;", 6) == 0)
+ if (!disable_packet_vCont)
{
- require_running (own_buf);
- handle_v_cont (own_buf, status, signal);
- return;
- }
+ if (strncmp (own_buf, "vCont;", 6) == 0)
+ {
+ require_running (own_buf);
+ handle_v_cont (own_buf, status, signal);
+ return;
+ }
- if (strncmp (own_buf, "vCont?", 6) == 0)
- {
- strcpy (own_buf, "vCont;c;C;s;S");
- return;
+ if (strncmp (own_buf, "vCont?", 6) == 0)
+ {
+ strcpy (own_buf, "vCont;c;C;s;S");
+ return;
+ }
}
if (strncmp (own_buf, "vFile:", 6) == 0
static void
gdbserver_version (void)
{
- printf ("GNU gdbserver %s\n"
+ 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",
- 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");
+ 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);
}
+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 ()) \
}
else if (strcmp (*next_arg, "--help") == 0)
{
- gdbserver_usage ();
+ gdbserver_usage (stdout);
exit (0);
}
else if (strcmp (*next_arg, "--attach") == 0)
attach = 1;
else if (strcmp (*next_arg, "--multi") == 0)
multi_mode = 1;
+ else if (strcmp (*next_arg, "--wrapper") == 0)
+ {
+ next_arg++;
+
+ wrapper_argv = next_arg;
+ while (*next_arg != NULL && strcmp (*next_arg, "--") != 0)
+ next_arg++;
+
+ if (next_arg == wrapper_argv || *next_arg == NULL)
+ {
+ gdbserver_usage (stderr);
+ exit (1);
+ }
+
+ /* Consume the "--". */
+ *next_arg = NULL;
+ }
else if (strcmp (*next_arg, "--debug") == 0)
debug_threads = 1;
+ else if (strcmp (*next_arg, "--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);
}
projects / deliverable / binutils-gdb.git / blobdiff