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tcg: Avoid stores to unaligned addresses

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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>
This commit is contained in:
Peter Maydell 2014-03-28 15:29:47 +00:00 committed by Richard Henderson
parent 86360ad71d
commit 4387345a96
1 changed files with 3 additions and 3 deletions
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6
tcg/tcg.c
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@ -125,21 +125,21 @@ static inline void tcg_out8(TCGContext *s, uint8_t v)
static inline void tcg_out16(TCGContext *s, uint16_t v) static inline void tcg_out16(TCGContext *s, uint16_t v)
{ {
uint8_t *p = s->code_ptr; uint8_t *p = s->code_ptr;
*(uint16_t *)p = v; memcpy(p, &v, sizeof(v));
s->code_ptr = p + 2; s->code_ptr = p + 2;
} }
static inline void tcg_out32(TCGContext *s, uint32_t v) static inline void tcg_out32(TCGContext *s, uint32_t v)
{ {
uint8_t *p = s->code_ptr; uint8_t *p = s->code_ptr;
*(uint32_t *)p = v; memcpy(p, &v, sizeof(v));
s->code_ptr = p + 4; s->code_ptr = p + 4;
} }
static inline void tcg_out64(TCGContext *s, uint64_t v) static inline void tcg_out64(TCGContext *s, uint64_t v)
{ {
uint8_t *p = s->code_ptr; uint8_t *p = s->code_ptr;
*(uint64_t *)p = v; memcpy(p, &v, sizeof(v));
s->code_ptr = p + 8; s->code_ptr = p + 8;
} }