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* remote.c (remote_protocol_vcont): New variable.
(set_remote_protocol_vcont_packet_cmd): New function. (show_remote_protocol_vcont_packet_cmd): New function. (init_all_packet_configs): Handle remote_protocol_vcont. (remote_vcont_probe): New function. (remote_vcont_resume): New function. (remote_resume): Use it. (remote_async_resume): Call remote_resume. (_initialize_remote): Add verbose-resume packet commands.
This commit is contained in:
Daniel Jacobowitz
parent
ac39399582
commit
506fb36784
@ -1,3 +1,15 @@
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2003-10-16 Daniel Jacobowitz <drow@mvista.com>
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* remote.c (remote_protocol_vcont): New variable.
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(set_remote_protocol_vcont_packet_cmd): New function.
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(show_remote_protocol_vcont_packet_cmd): New function.
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(init_all_packet_configs): Handle remote_protocol_vcont.
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(remote_vcont_probe): New function.
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(remote_vcont_resume): New function.
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(remote_resume): Use it.
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(remote_async_resume): Call remote_resume.
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(_initialize_remote): Add verbose-resume packet commands.
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2003-10-16 Andrew Cagney <cagney@redhat.com>
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* infrun.c (handle_inferior_event): Add comment about
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249
gdb/remote.c
249
gdb/remote.c
@ -749,6 +749,23 @@ packet_ok (const char *buf, struct packet_config *config)
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}
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}
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/* Should we try the 'vCont' (descriptive resume) request? */
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static struct packet_config remote_protocol_vcont;
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static void
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set_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
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struct cmd_list_element *c)
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{
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update_packet_config (&remote_protocol_vcont);
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}
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static void
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show_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
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struct cmd_list_element *c)
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{
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show_packet_config_cmd (&remote_protocol_vcont);
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}
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/* Should we try the 'qSymbol' (target symbol lookup service) request? */
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static struct packet_config remote_protocol_qSymbol;
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@ -2190,6 +2207,7 @@ init_all_packet_configs (void)
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update_packet_config (&remote_protocol_E);
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update_packet_config (&remote_protocol_P);
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update_packet_config (&remote_protocol_qSymbol);
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update_packet_config (&remote_protocol_vcont);
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for (i = 0; i < NR_Z_PACKET_TYPES; i++)
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update_packet_config (&remote_protocol_Z[i]);
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/* Force remote_write_bytes to check whether target supports binary
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@ -2503,6 +2521,130 @@ bin2hex (const char *bin, char *hex, int count)
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return i;
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}
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/* Check for the availability of vCont. This function should also check
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the response. */
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static void
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remote_vcont_probe (struct remote_state *rs, char *buf)
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{
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strcpy (buf, "vCont?");
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putpkt (buf);
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getpkt (buf, rs->remote_packet_size, 0);
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/* Make sure that the features we assume are supported. */
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if (strncmp (buf, "vCont", 5) == 0)
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{
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char *p = &buf[5];
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int support_s, support_S, support_c, support_C;
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support_s = 0;
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support_S = 0;
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support_c = 0;
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support_C = 0;
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while (p && *p == ';')
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{
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p++;
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if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
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support_s = 1;
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else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
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support_S = 1;
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else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
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support_c = 1;
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else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
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support_C = 1;
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p = strchr (p, ';');
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}
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/* If s, S, c, and C are not all supported, we can't use vCont. Clearing
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BUF will make packet_ok disable the packet. */
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if (!support_s || !support_S || !support_c || !support_C)
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buf[0] = 0;
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}
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packet_ok (buf, &remote_protocol_vcont);
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}
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/* Resume the remote inferior by using a "vCont" packet. The thread
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to be resumed is PTID; STEP and SIGGNAL indicate whether the
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resumed thread should be single-stepped and/or signalled. If PTID's
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PID is -1, then all threads are resumed; the thread to be stepped and/or
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signalled is given in the global INFERIOR_PTID. This function returns
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non-zero iff it resumes the inferior.
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This function issues a strict subset of all possible vCont commands at the
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moment. */
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static int
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remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
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{
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struct remote_state *rs = get_remote_state ();
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int pid = PIDGET (ptid);
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char *buf = NULL;
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struct cleanup *old_cleanup;
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buf = xmalloc (rs->remote_packet_size);
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old_cleanup = make_cleanup (xfree, buf);
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if (remote_protocol_vcont.support == PACKET_SUPPORT_UNKNOWN)
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remote_vcont_probe (rs, buf);
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if (remote_protocol_vcont.support == PACKET_DISABLE)
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{
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do_cleanups (old_cleanup);
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return 0;
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}
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/* If we could generate a wider range of packets, we'd have to worry
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about overflowing BUF. Should there be a generic
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"multi-part-packet" packet? */
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if (PIDGET (inferior_ptid) == MAGIC_NULL_PID)
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{
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/* MAGIC_NULL_PTID means that we don't have any active threads, so we
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don't have any PID numbers the inferior will understand. Make sure
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to only send forms that do not specify a PID. */
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if (step && siggnal != TARGET_SIGNAL_0)
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sprintf (buf, "vCont;S%02x", siggnal);
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else if (step)
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sprintf (buf, "vCont;s");
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else if (siggnal != TARGET_SIGNAL_0)
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sprintf (buf, "vCont;C%02x", siggnal);
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else
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sprintf (buf, "vCont;c");
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}
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else if (pid == -1)
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{
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/* Resume all threads, with preference for INFERIOR_PTID. */
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if (step && siggnal != TARGET_SIGNAL_0)
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sprintf (buf, "vCont;S%02x:%x;c", siggnal, PIDGET (inferior_ptid));
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else if (step)
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sprintf (buf, "vCont;s:%x;c", PIDGET (inferior_ptid));
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else if (siggnal != TARGET_SIGNAL_0)
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sprintf (buf, "vCont;C%02x:%x;c", siggnal, PIDGET (inferior_ptid));
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else
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sprintf (buf, "vCont;c");
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}
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else
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{
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/* Scheduler locking; resume only PTID. */
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if (step && siggnal != TARGET_SIGNAL_0)
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sprintf (buf, "vCont;S%02x:%x", siggnal, pid);
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else if (step)
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sprintf (buf, "vCont;s:%x", pid);
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else if (siggnal != TARGET_SIGNAL_0)
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sprintf (buf, "vCont;C%02x:%x", siggnal, pid);
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else
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sprintf (buf, "vCont;c:%x", pid);
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}
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putpkt (buf);
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do_cleanups (old_cleanup);
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return 1;
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}
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/* Tell the remote machine to resume. */
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static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
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@ -2517,11 +2659,6 @@ remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
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int pid = PIDGET (ptid);
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char *p;
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if (pid == -1)
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set_thread (0, 0); /* run any thread */
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else
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set_thread (pid, 0); /* run this thread */
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last_sent_signal = siggnal;
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last_sent_step = step;
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@ -2530,6 +2667,15 @@ remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
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if (target_resume_hook)
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(*target_resume_hook) ();
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/* The vCont packet doesn't need to specify threads via Hc. */
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if (remote_vcont_resume (ptid, step, siggnal))
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return;
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/* All other supported resume packets do use Hc, so call set_thread. */
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if (pid == -1)
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set_thread (0, 0); /* run any thread */
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else
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set_thread (pid, 0); /* run this thread */
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/* The s/S/c/C packets do not return status. So if the target does
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not support the S or C packets, the debug agent returns an empty
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@ -2602,91 +2748,8 @@ remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
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static void
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remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal)
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{
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struct remote_state *rs = get_remote_state ();
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char *buf = alloca (rs->remote_packet_size);
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int pid = PIDGET (ptid);
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char *p;
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remote_resume (ptid, step, siggnal);
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if (pid == -1)
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set_thread (0, 0); /* run any thread */
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else
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set_thread (pid, 0); /* run this thread */
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last_sent_signal = siggnal;
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last_sent_step = step;
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/* A hook for when we need to do something at the last moment before
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resumption. */
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if (target_resume_hook)
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(*target_resume_hook) ();
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/* The s/S/c/C packets do not return status. So if the target does
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not support the S or C packets, the debug agent returns an empty
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string which is detected in remote_wait(). This protocol defect
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is fixed in the e/E packets. */
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if (step && step_range_end)
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{
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/* If the target does not support the 'E' packet, we try the 'S'
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packet. Ideally we would fall back to the 'e' packet if that
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too is not supported. But that would require another copy of
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the code to issue the 'e' packet (and fall back to 's' if not
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supported) in remote_wait(). */
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if (siggnal != TARGET_SIGNAL_0)
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{
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if (remote_protocol_E.support != PACKET_DISABLE)
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{
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p = buf;
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*p++ = 'E';
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*p++ = tohex (((int) siggnal >> 4) & 0xf);
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*p++ = tohex (((int) siggnal) & 0xf);
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*p++ = ',';
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p += hexnumstr (p, (ULONGEST) step_range_start);
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*p++ = ',';
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p += hexnumstr (p, (ULONGEST) step_range_end);
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*p++ = 0;
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putpkt (buf);
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getpkt (buf, (rs->remote_packet_size), 0);
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if (packet_ok (buf, &remote_protocol_E) == PACKET_OK)
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goto register_event_loop;
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}
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}
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else
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{
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if (remote_protocol_e.support != PACKET_DISABLE)
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{
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p = buf;
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*p++ = 'e';
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p += hexnumstr (p, (ULONGEST) step_range_start);
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*p++ = ',';
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p += hexnumstr (p, (ULONGEST) step_range_end);
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*p++ = 0;
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putpkt (buf);
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getpkt (buf, (rs->remote_packet_size), 0);
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if (packet_ok (buf, &remote_protocol_e) == PACKET_OK)
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goto register_event_loop;
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}
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}
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}
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if (siggnal != TARGET_SIGNAL_0)
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{
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buf[0] = step ? 'S' : 'C';
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buf[1] = tohex (((int) siggnal >> 4) & 0xf);
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buf[2] = tohex ((int) siggnal & 0xf);
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buf[3] = '\0';
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}
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else
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strcpy (buf, step ? "s" : "c");
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putpkt (buf);
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register_event_loop:
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/* We are about to start executing the inferior, let's register it
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with the event loop. NOTE: this is the one place where all the
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execution commands end up. We could alternatively do this in each
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@ -5952,6 +6015,7 @@ show_remote_cmd (char *args, int from_tty)
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show_remote_protocol_E_packet_cmd (args, from_tty, NULL);
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show_remote_protocol_P_packet_cmd (args, from_tty, NULL);
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show_remote_protocol_qSymbol_packet_cmd (args, from_tty, NULL);
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show_remote_protocol_vcont_packet_cmd (args, from_tty, NULL);
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show_remote_protocol_binary_download_cmd (args, from_tty, NULL);
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}
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@ -6125,6 +6189,13 @@ in a memory packet.\n",
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add_info ("remote-process", remote_info_process,
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"Query the remote system for process info.");
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add_packet_config_cmd (&remote_protocol_vcont,
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"vCont", "verbose-resume",
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set_remote_protocol_vcont_packet_cmd,
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show_remote_protocol_vcont_packet_cmd,
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&remote_set_cmdlist, &remote_show_cmdlist,
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0);
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add_packet_config_cmd (&remote_protocol_qSymbol,
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"qSymbol", "symbol-lookup",
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set_remote_protocol_qSymbol_packet_cmd,
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