Stop GDB when polling fails, srst assert or powerdropout is detected
authorØyvind Harboe <oyvind.harboe@zylin.com>
Thu, 8 Oct 2009 12:53:25 +0000 (14:53 +0200)
committerØyvind Harboe <oyvind.harboe@zylin.com>
Thu, 8 Oct 2009 12:53:25 +0000 (14:53 +0200)
src/server/gdb_server.c
src/target/target.c
src/target/target.h

index 44d9de8..a0077e9 100644 (file)
@@ -714,7 +714,7 @@ int gdb_target_callback_event_handler(struct target_s *target, enum target_event
        target_handle_event(target, event);
        switch (event)
        {
-               case TARGET_EVENT_EARLY_HALTED:
+               case TARGET_EVENT_GDB_HALT:
                        gdb_frontend_halted(target, connection);
                        break;
                case TARGET_EVENT_HALTED:
index 0040ba0..253a7e4 100644 (file)
@@ -157,7 +157,7 @@ static const Jim_Nvp nvp_target_event[] = {
        { .value = TARGET_EVENT_OLD_gdb_program_config , .name = "old-gdb_program_config" },
        { .value = TARGET_EVENT_OLD_pre_resume         , .name = "old-pre_resume" },
 
-       { .value = TARGET_EVENT_EARLY_HALTED, .name = "early-halted" },
+       { .value = TARGET_EVENT_GDB_HALT, .name = "gdb-halt" },
        { .value = TARGET_EVENT_HALTED, .name = "halted" },
        { .value = TARGET_EVENT_RESUMED, .name = "resumed" },
        { .value = TARGET_EVENT_RESUME_START, .name = "resume-start" },
@@ -821,7 +821,7 @@ int target_call_event_callbacks(target_t *target, enum target_event event)
        if (event == TARGET_EVENT_HALTED)
        {
                /* execute early halted first */
-               target_call_event_callbacks(target, TARGET_EVENT_EARLY_HALTED);
+               target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
        }
 
        LOG_DEBUG("target event %i (%s)",
@@ -1658,6 +1658,15 @@ static int sense_handler(void)
        return ERROR_OK;
 }
 
+static void target_call_event_callbacks_all(enum target_event e) {
+       target_t *target;
+       target = all_targets;
+       while (target) {
+               target_call_event_callbacks(target, e);
+               target = target->next;
+       }
+}
+
 /* process target state changes */
 int handle_target(void *priv)
 {
@@ -1676,6 +1685,7 @@ int handle_target(void *priv)
                int did_something = 0;
                if (runSrstAsserted)
                {
+                       target_call_event_callbacks_all(TARGET_EVENT_GDB_HALT);
                        Jim_Eval(interp, "srst_asserted");
                        did_something = 1;
                }
@@ -1686,6 +1696,7 @@ int handle_target(void *priv)
                }
                if (runPowerDropout)
                {
+                       target_call_event_callbacks_all(TARGET_EVENT_GDB_HALT);
                        Jim_Eval(interp, "power_dropout");
                        did_something = 1;
                }
@@ -1726,7 +1737,10 @@ int handle_target(void *priv)
                {
                        /* polling may fail silently until the target has been examined */
                        if ((retval = target_poll(target)) != ERROR_OK)
+                       {
+                               target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
                                return retval;
+                       }
                }
        }
 
index 0ff2258..6547d4d 100644 (file)
@@ -163,8 +163,14 @@ enum target_event
 
        /* allow GDB to do stuff before others handle the halted event,
         * this is in lieu of defining ordering of invocation of events,
-        * which would be more complicated */
-       TARGET_EVENT_EARLY_HALTED,
+        * which would be more complicated
+        *
+        * Telling GDB to halt does not mean that the target stopped running,
+        * simply that we're dropping out of GDB's waiting for step or continue.
+        *
+        * This can be useful when e.g. detecting power dropout.
+        */
+       TARGET_EVENT_GDB_HALT,
        TARGET_EVENT_HALTED,            /* target entered debug state from normal execution or reset */
        TARGET_EVENT_RESUMED,           /* target resumed to normal execution */
        TARGET_EVENT_RESUME_START,