Return the appropriate type prefix (r, a, none) when reporting
watchpoint hits to the gdb front-end.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 gdbstub.c |   17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

Index: b/gdbstub.c
===================================================================
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1495,6 +1495,7 @@ static void gdb_vm_stopped(void *opaque,
 {
     GDBState *s = opaque;
     char buf[256];
+    const char *type;
     int ret;
 
     if (s->state == RS_SYSCALL)
@@ -1505,8 +1506,20 @@ static void gdb_vm_stopped(void *opaque,
 
     if (reason == EXCP_DEBUG) {
         if (s->env->watchpoint_hit) {
-            snprintf(buf, sizeof(buf), "T%02xwatch:" TARGET_FMT_lx ";",
-                     SIGTRAP,
+            switch (s->env->watchpoint[s->env->watchpoint_hit - 1].flags &
+                    (PAGE_READ | PAGE_WRITE)) {
+            case PAGE_READ:
+                type = "r";
+                break;
+            case PAGE_READ | PAGE_WRITE:
+                type = "a";
+                break;
+            default:
+                type = "";
+                break;
+            }
+            snprintf(buf, sizeof(buf), "T%02x%swatch:" TARGET_FMT_lx ";",
+                     SIGTRAP, type,
                      s->env->watchpoint[s->env->watchpoint_hit - 1].vaddr);
             put_packet(s, buf);
             s->env->watchpoint_hit = 0;