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loader: Make sure the new stack is 16-byte aligned in the preloader.

This commit is contained in:
Alexandre Julliard 2010-12-16 16:52:02 +01:00
parent 3f213cb798
commit 144cb78dba
1 changed files with 4 additions and 3 deletions
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7
loader/preloader.c
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@ -512,18 +512,19 @@ static void set_auxiliary_values( ElfW(auxv_t) *av, const ElfW(auxv_t) *new_av,
src = (char *)*stack;
dst = src - (new_count - delete_count) * sizeof(*av);
if (new_count > delete_count) /* need to make room for the extra values */
dst = (char *)((unsigned long)dst & ~15);
if (dst < src) /* need to make room for the extra values */
{
int len = (char *)(av + av_count + 1) - src;
for (i = 0; i < len; i++) dst[i] = src[i];
}
else if (new_count < delete_count) /* get rid of unused values */
else if (dst > src) /* get rid of unused values */
{
int len = (char *)(av + av_count + 1) - src;
for (i = len - 1; i >= 0; i--) dst[i] = src[i];
}
*stack = dst;
av -= (new_count - delete_count);
av = (ElfW(auxv_t) *)((char *)av + (dst - src));
/* now set the values */
for (j = 0; new_av[j].a_type != AT_NULL; j++)