diff options
| author | Sergey Fedorov <serge.fdrv@gmail.com> | 2016-04-22 19:08:47 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-05-12 14:06:41 -1000 |
| commit | 0d07abf05e98903c7faf204a9a90f7d45b7554dc (patch) | |
| tree | 1090615eecc65e59f17b1f236b47495aaecf728e /include/exec/exec-all.h | |
| parent | 399f1648573d49b9411089e4e2ea62b6357b166e (diff) | |
| download | qemu-0d07abf05e98903c7faf204a9a90f7d45b7554dc.zip | |
tcg/i386: Make direct jump patching thread-safe
Ensure direct jump patching in i386 is atomic by:
* naturally aligning a location of direct jump address;
* using atomic_read()/atomic_set() for code patching.
tcg_out_nopn() implementation:
Suggested-by: Richard Henderson <rth@twiddle.net>.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Message-Id: <1461341333-19646-6-git-send-email-sergey.fedorov@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include/exec/exec-all.h')
| -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 d49befdba5..0ab7803259 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -313,7 +313,7 @@ void ppc_tb_set_jmp_target(uintptr_t jmp_addr, uintptr_t addr); static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr) { /* patch the branch destination */ - stl_le_p((void*)jmp_addr, addr - (jmp_addr + 4)); + atomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); /* no need to flush icache explicitly */ } #elif defined(__s390x__) |