src/env/__stack_chk_fail.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

#include <string.h>
#include <inttypes.h>
#include <elf.h>
#include "pthread_impl.h"
#include "atomic.h"

uintptr_t __stack_chk_guard;

void __init_ssp(size_t *auxv)
{
	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)
{
	a_crash();
}