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authorMax Filippov <jcmvbkbc@gmail.com>2012-05-27 20:21:08 +0400
committerMichael Roth <mdroth@linux.vnet.ibm.com>2012-06-25 08:48:46 -0500
commit07ff37597bee726681c94c650568870bd4ff94d1 (patch)
tree6b7e2ff82769e4c51a06dcf70728508fc641cf6f
parenttarget-xtensa: add MMU pagewalking tests (diff)
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exec: fix TB invalidation after breakpoint insertion/deletion
tb_invalidate_phys_addr has to be called with the exact physical address of the breakpoint we add/remove, not just the page's base address. Otherwise we easily fail to flush the right TB. This breakage was introduced by the commit f3705d5329 "memory: make phys_page_find() return an unadjusted". This appeared to work for some guest architectures because their cpu_get_phys_page_debug implementation returns full translated physical address, not just the base of the TARGET_PAGE_SIZE-sized page. Reported-by: TeLeMan <geleman@gmail.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com> (cherry picked from commit 9d70c4b7b8a580959cc4f739e7c9a04964d00d46) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
-rw-r--r--exec.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/exec.c b/exec.c
index a0494c72b..0a67f078c 100644
--- a/exec.c
+++ b/exec.c
@@ -1492,7 +1492,8 @@ void tb_invalidate_phys_addr(target_phys_addr_t addr)
static void breakpoint_invalidate(CPUArchState *env, target_ulong pc)
{
- tb_invalidate_phys_addr(cpu_get_phys_page_debug(env, pc));
+ tb_invalidate_phys_addr(cpu_get_phys_page_debug(env, pc) |
+ (pc & ~TARGET_PAGE_MASK));
}
#endif
#endif /* TARGET_HAS_ICE */