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authorAlexander Graf <agraf@suse.de>2012-05-10 22:40:10 +0000
committerBlue Swirl <blauwirbel@gmail.com>2012-05-19 15:49:40 +0000
commit77a8f1a5125457d845fac6aa0c2e1e2681d94f07 (patch)
tree48ebe6991720d75db8c9b952dc4ed474ef586acd /exec-all.h
parent4636b9d1466adde156d469c92d6e7cae7311b81e (diff)
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linux-user: Fix stale tbs after mmap
If we execute linux-user code that does the following: * A = mmap() * execute code in A * munmap(A) * B = mmap(), but mmap returns the same address as A * execute code in B we end up executing a stale cached tb that contains translated code from A, while we want new code from B. This patch adds a TB flush for mmap'ed regions, before we return them, avoiding the whole issue. It also adds a flush for munmap, so that we don't execute stale TBs instead of getting a segfault. Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Riku Voipio <riku.voipio@linaro.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'exec-all.h')
-rw-r--r--exec-all.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/exec-all.h b/exec-all.h
index c1b7e1f..9bda7f7 100644
--- a/exec-all.h
+++ b/exec-all.h
@@ -96,6 +96,8 @@ void QEMU_NORETURN cpu_loop_exit(CPUArchState *env1);
int page_unprotect(target_ulong address, uintptr_t pc, void *puc);
void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
int is_cpu_write_access);
+void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end,
+ int is_cpu_write_access);
#if !defined(CONFIG_USER_ONLY)
/* cputlb.c */
void tlb_flush_page(CPUArchState *env, target_ulong addr);