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x86_64: fix is_negated_errno for x32 personality

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* syscall.c (is_negated_errno) [X86_64]: Do not truncate kernel_ulong_t
to uint32_t for x32 personality.
This commit is contained in:
Дмитрий Левин 2016-10-03 15:51:49 +00:00
parent 7b6d66f215
commit 820adffcd9
1 changed files with 9 additions and 9 deletions
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18
syscall.c
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@ -1174,18 +1174,18 @@ is_negated_errno(kernel_ulong_t val)
/* Linux kernel defines MAX_ERRNO to 4095. */
kernel_ulong_t max = -(kernel_long_t) 4095;
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize < sizeof(val)) {
#if defined X86_64 || defined X32
/*
* current_wordsize is 4 for x32 personality
* but truncation _must not_ be done in it, so
* check current_personality instead.
*/
if (current_personality == 1) {
val = (uint32_t) val;
max = (uint32_t) max;
}
#elif defined X32
/*
* current_wordsize is 4 even in personality 0 (native X32)
* but truncation _must not_ be done in it.
* can't check current_wordsize here!
*/
if (current_personality != 0) {
#elif SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize < sizeof(val)) {
val = (uint32_t) val;
max = (uint32_t) max;
}