tcg: Avoid stores to unaligned addresses

Avoid stores to unaligned addresses in TCG code generation, by using the
usual memcpy() approach. (Using bswap.h would drag a lot of QEMU baggage
into TCG, so it's simpler just to do direct memcpy() here.)

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

diff --git a/tcg/tcg.c b/tcg/tcg.c
index e71f7a09757ee7ce41a789ff9f6c25aeb5953abc..293f00bc5a334e9f7f79444dac7bbe7aee0e2542 100644 (file)
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -125,21 +125,21 @@ static inline void tcg_out8(TCGContext *s, uint8_t v)
 static inline void tcg_out16(TCGContext *s, uint16_t v)
 {
     uint8_t *p = s->code_ptr;
-    *(uint16_t *)p = v;
+    memcpy(p, &v, sizeof(v));
     s->code_ptr = p + 2;
 }
 
 static inline void tcg_out32(TCGContext *s, uint32_t v)
 {
     uint8_t *p = s->code_ptr;
-    *(uint32_t *)p = v;
+    memcpy(p, &v, sizeof(v));
     s->code_ptr = p + 4;
 }
 
 static inline void tcg_out64(TCGContext *s, uint64_t v)
 {
     uint8_t *p = s->code_ptr;
-    *(uint64_t *)p = v;
+    memcpy(p, &v, sizeof(v));
     s->code_ptr = p + 8;
 }