fix stack protector crashes on x32 & powerpc due to misplaced TLS canary
[musl] / src / env / __stack_chk_fail.c
1 #include <string.h>
2 #include <stdint.h>
3 #include "pthread_impl.h"
4
5 uintptr_t __stack_chk_guard;
6
7 void __init_ssp(void *entropy)
8 {
9         if (entropy) memcpy(&__stack_chk_guard, entropy, sizeof(uintptr_t));
10         else __stack_chk_guard = (uintptr_t)&__stack_chk_guard * 1103515245;
11
12         __pthread_self()->CANARY = __stack_chk_guard;
13 }
14
15 void __stack_chk_fail(void)
16 {
17         a_crash();
18 }
19
20 #ifdef SHARED
21
22 __attribute__((__visibility__("hidden")))
23 void __stack_chk_fail_local(void)
24 {
25         a_crash();
26 }
27
28 #endif