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tcg: Increase minimum alignment from tcg_malloc to 8

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For a 64-bit ILP32 host, aligning to sizeof(long) is not enough.
Guess the minimum for any host is 8, as that covers uint64_t.
Qemu doesn't use a host long double or host vectors, except in
extremely limited circumstances.

Fixes a bus error for a sparc v8plus host.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-08-02 14:50:04 -07:00
parent de4e05d1e5
commit 13aaef678e
1 changed files with 4 additions and 1 deletions
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5
tcg/tcg.h
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@ -762,7 +762,10 @@ static inline void *tcg_malloc(int size)
{ {
TCGContext *s = &tcg_ctx; TCGContext *s = &tcg_ctx;
uint8_t *ptr, *ptr_end; uint8_t *ptr, *ptr_end;
size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
/* ??? This is a weak placeholder for minimum malloc alignment. */
size = QEMU_ALIGN_UP(size, 8);
ptr = s->pool_cur; ptr = s->pool_cur;
ptr_end = ptr + size; ptr_end = ptr + size;
if (unlikely(ptr_end > s->pool_end)) { if (unlikely(ptr_end > s->pool_end)) {