From 7d14e0e2d661479985197203589c38840e1066df Mon Sep 17 00:00:00 2001 From: Sergey Fedorov Date: Fri, 22 Apr 2016 19:08:49 +0300 Subject: 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 Signed-off-by: Sergey Fedorov Message-Id: <1461341333-19646-8-git-send-email-sergey.fedorov@linaro.org> Signed-off-by: Richard Henderson --- include/exec/exec-all.h | 25 ++----------------------- 1 file changed, 2 insertions(+), 23 deletions(-) (limited to 'include') 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 -- cgit v1.2.3