[Qemu-stable] [PATCH for 1.7] exec: fix breakpoint_invalidate when pc may not be translated

[Max Filippov]

This fixes qemu abort with the following message:

    include/qemu/int128.h:22: int128_get64: Assertion `!a.hi' failed.

which happens due to attempt to invalidate breakpoint by virtual address
for which get_phys_page_debug couldn't find mapping.

For more details see
http://lists.nongnu.org/archive/html/qemu-devel/2013-09/msg04582.html

Cc: address@hidden
Signed-off-by: Max Filippov <address@hidden>
---
 exec.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/exec.c b/exec.c
index 2e31ffc..9150430 100644
--- a/exec.c
+++ b/exec.c
@@ -409,8 +409,10 @@ static void breakpoint_invalidate(CPUState *cpu, 
target_ulong pc)
 #else
 static void breakpoint_invalidate(CPUState *cpu, target_ulong pc)
 {
-    tb_invalidate_phys_addr(cpu_get_phys_page_debug(cpu, pc) |
-            (pc & ~TARGET_PAGE_MASK));
+    hwaddr phys = cpu_get_phys_page_debug(cpu, pc);
+    if (phys != -1) {
+        tb_invalidate_phys_addr(phys | (pc & ~TARGET_PAGE_MASK));
+    }
 }
 #endif
 #endif /* TARGET_HAS_ICE */
-- 
1.8.1.4