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| author | Sergey Fedorov | 2016-04-22 18:08:45 +0200 |
|---|---|---|
| committer | Richard Henderson | 2016-05-13 02:06:40 +0200 |
| commit | 76442a939ef8fc062b35a890a824de203bb5bd5f (patch) | |
| tree | 3bfd290f9dd64655502b2ef9fc16c60172ed30dc /include | |
| parent | include/qemu/osdep.h: Add macros for pointer alignment (diff) | |
| download | qemu-76442a939ef8fc062b35a890a824de203bb5bd5f.tar.gz qemu-76442a939ef8fc062b35a890a824de203bb5bd5f.tar.xz qemu-76442a939ef8fc062b35a890a824de203bb5bd5f.zip | |
tci: Make direct jump patching thread-safe
Ensure direct jump patching in TCI is atomic by:
* naturally aligning a location of direct jump address;
* using atomic_read()/atomic_set() to load/store the address.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Message-Id: <1461341333-19646-4-git-send-email-sergey.fedorov@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/exec-all.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index c75fb3ac25..d49befdba5 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -303,7 +303,7 @@ void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr); static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr) { /* patch the branch destination */ - *(uint32_t *)jmp_addr = addr - (jmp_addr + 4); + atomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); /* no need to flush icache explicitly */ } #elif defined(_ARCH_PPC) |