[Qemu-devel] [PULL 10/39] tcg/sparc: Make direct jump patching thread-safe

[Richard Henderson]

From: Sergey Fedorov <address@hidden>

Ensure direct jump patching in SPARC is atomic by using
atomic_read()/atomic_set() for code patching.

Signed-off-by: Sergey Fedorov <address@hidden>
Signed-off-by: Sergey Fedorov <address@hidden>
Reviewed-by: Alex Bennée <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
 tcg/sparc/tcg-target.inc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tcg/sparc/tcg-target.inc.c b/tcg/sparc/tcg-target.inc.c
index d641cfd..c6479e2 100644
--- a/tcg/sparc/tcg-target.inc.c
+++ b/tcg/sparc/tcg-target.inc.c
@@ -1647,6 +1647,6 @@ void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t 
addr)
        the code_gen_buffer can't be larger than 2GB.  */
     tcg_debug_assert(disp == (int32_t)disp);
 
-    *ptr = CALL | (uint32_t)disp >> 2;
+    atomic_set(ptr, deposit32(CALL, 0, 30, disp >> 2));
     flush_icache_range(jmp_addr, jmp_addr + 4);
 }
-- 
2.5.5