Add debug exception hook (Jan Kiszka)

This patch allows to hook into the delivery of EXCP_DEBUG so that other
use beyond guest debugging becomes possible.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5745 c046a42c-6fe2-441c-8c8c-71466251a162

2 files changed, 17 insertions, 0 deletions

diff --git a/cpu-exec.c b/cpu-exec.c
index 191d9e428..8d86527b8 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -183,6 +183,16 @@ static inline TranslationBlock *tb_find_fast(void)
     return tb;
 }
 
+static CPUDebugExcpHandler *debug_excp_handler;
+
+CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
+{
+    CPUDebugExcpHandler *old_handler = debug_excp_handler;
+
+    debug_excp_handler = handler;
+    return old_handler;
+}
+
 static void cpu_handle_debug_exception(CPUState *env)
 {
     CPUWatchpoint *wp;
@@ -190,6 +200,9 @@ static void cpu_handle_debug_exception(CPUState *env)
     if (!env->watchpoint_hit)
         for (wp = env->watchpoints; wp != NULL; wp = wp->next)
             wp->flags &= ~BP_WATCHPOINT_HIT;
+
+    if (debug_excp_handler)
+        debug_excp_handler(env);
 }
 
 /* main execution loop */
diff --git a/exec-all.h b/exec-all.h
index e3da98a7f..aec318ba8 100644
--- a/exec-all.h
+++ b/exec-all.h
@@ -387,4 +387,8 @@ static inline int kqemu_is_ok(CPUState *env)
 }
 
 #endif
+
+typedef void (CPUDebugExcpHandler)(CPUState *env);
+
+CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler);
 #endif