diff options
| author | Sergey Fedorov <serge.fdrv@gmail.com> | 2016-04-22 19:08:49 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-05-12 14:06:41 -1000 |
| commit | 7d14e0e2d661479985197203589c38840e1066df (patch) | |
| tree | 9c1d6052fd56ceb3484ecbbcc99d211523876acf /include | |
| parent | ed3d51ecd7fe248d3959e469d53890ac9ffe0cd2 (diff) | |
tcg/arm: Make direct jump patching thread-safe
Ensure direct jump patching in ARM is atomic by using
atomic_read()/atomic_set() for code patching.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Message-Id: <1461341333-19646-8-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 | 25 |
1 files changed, 2 insertions, 23 deletions
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 6c095e8636..30cdd699f4 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -328,29 +328,8 @@ static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr) void aarch64_tb_set_jmp_target(uintptr_t jmp_addr, uintptr_t addr); #define tb_set_jmp_target1 aarch64_tb_set_jmp_target #elif defined(__arm__) -static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr) -{ -#if !QEMU_GNUC_PREREQ(4, 1) - register unsigned long _beg __asm ("a1"); - register unsigned long _end __asm ("a2"); - register unsigned long _flg __asm ("a3"); -#endif - - /* we could use a ldr pc, [pc, #-4] kind of branch and avoid the flush */ - *(uint32_t *)jmp_addr = - (*(uint32_t *)jmp_addr & ~0xffffff) - | (((addr - (jmp_addr + 8)) >> 2) & 0xffffff); - -#if QEMU_GNUC_PREREQ(4, 1) - __builtin___clear_cache((char *) jmp_addr, (char *) jmp_addr + 4); -#else - /* flush icache */ - _beg = jmp_addr; - _end = jmp_addr + 4; - _flg = 0; - __asm __volatile__ ("swi 0x9f0002" : : "r" (_beg), "r" (_end), "r" (_flg)); -#endif -} +void arm_tb_set_jmp_target(uintptr_t jmp_addr, uintptr_t addr); +#define tb_set_jmp_target1 arm_tb_set_jmp_target #elif defined(__sparc__) || defined(__mips__) void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr); #else |