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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>
This commit is contained in:
Max Filippov 2012-05-27 20:21:08 +04:00 committed by Blue Swirl
parent c305e32f43
commit 9d70c4b7b8
1 changed files with 2 additions and 1 deletions
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exec.c
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@ -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 */