- added patch to make single-stepping more resilient

(thanks to Nicolas Pitre for the patch)

git-svn-id: svn://svn.berlios.de/openocd/trunk@316 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/target/arm7_9_common.c b/src/target/arm7_9_common.c
index 45411c191f8af8482665098222be088137993807..3a0eb7b0865a375e373721ddce5c27f6a907c75e 100644 (file)
--- a/src/target/arm7_9_common.c
+++ b/src/target/arm7_9_common.c
@@ -1464,6 +1464,7 @@ int arm7_9_resume(struct target_s *target, int current, u32 address, int handle_
        arm7_9_common_t *arm7_9 = armv4_5->arch_info;
        breakpoint_t *breakpoint = target->breakpoints;
        reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
+       int err;
        
        DEBUG("-");
        
@@ -1511,14 +1512,21 @@ int arm7_9_resume(struct target_s *target, int current, u32 address, int handle_
                                
                        buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
                        embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
-                       arm7_9_execute_sys_speed(target);
+                       err = arm7_9_execute_sys_speed(target);
                        
                        DEBUG("disable single-step");
                        arm7_9->disable_single_step(target);
-                       
+
+                       if (err != ERROR_OK)
+                       {
+                               arm7_9_set_breakpoint(target, breakpoint);
+                               target->state = TARGET_UNKNOWN;
+                               return err;
+                       }
+
                        arm7_9_debug_entry(target);
                        DEBUG("new PC after step: 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
-               
+
                        DEBUG("set breakpoint at 0x%8.8x", breakpoint->address);
                        arm7_9_set_breakpoint(target, breakpoint);
                }
@@ -1614,6 +1622,7 @@ int arm7_9_step(struct target_s *target, int current, u32 address, int handle_br
        armv4_5_common_t *armv4_5 = target->arch_info;
        arm7_9_common_t *arm7_9 = armv4_5->arch_info;
        breakpoint_t *breakpoint = NULL;
+       int err;
 
        if (target->state != TARGET_HALTED)
        {
@@ -1652,22 +1661,25 @@ int arm7_9_step(struct target_s *target, int current, u32 address, int handle_br
        
        target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
 
-       arm7_9_execute_sys_speed(target);
+       err = arm7_9_execute_sys_speed(target);
        arm7_9->disable_single_step(target);
        
        /* registers are now invalid */
        armv4_5_invalidate_core_regs(target);
        
-       arm7_9_debug_entry(target);
+       if (err != ERROR_OK)
+       {
+               target->state = TARGET_UNKNOWN;
+       } else {
+               arm7_9_debug_entry(target);
+               target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+               DEBUG("target stepped");
+       }
        
-       target_call_event_callbacks(target, TARGET_EVENT_HALTED);
-
        if (breakpoint)
                arm7_9_set_breakpoint(target, breakpoint);
        
-       DEBUG("target stepped");
-
-       return ERROR_OK;
+       return err;
 
 }