diff options
Diffstat (limited to 'src/env/__stack_chk_fail.c')
| -rw-r--r-- | src/env/__stack_chk_fail.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/src/env/__stack_chk_fail.c b/src/env/__stack_chk_fail.c index bbba3511..c6d0feb9 100644 --- a/src/env/__stack_chk_fail.c +++ b/src/env/__stack_chk_fail.c @@ -1,11 +1,20 @@ +#include <string.h> +#include <inttypes.h> +#include <elf.h> #include "pthread_impl.h" #include "atomic.h" -void __init_ssp(void) +uintptr_t __stack_chk_guard; + +void __init_ssp(size_t *auxv) { -#ifndef __PIC__ - __pthread_self_init(); -#endif + size_t i; + pthread_t self = __pthread_self_init(); + uintptr_t canary; + for (i=0; auxv[i] && auxv[i]!=AT_RANDOM; i+=2); + if (auxv[i]) memcpy(&canary, (void *)auxv[i+1], sizeof canary); + else canary = (uintptr_t)&canary * 1103515245; + __stack_chk_guard = self->canary = canary; } void __stack_chk_fail(void) |