#include <string.h>
#include <stdint.h>
#include "pthread_impl.h"

// Sacrifice 8 bits of entropy to mitigate non-terminated C string overflows
static const uintptr_t canary_mask = __BYTE_ORDER == __BIG_ENDIAN ?
  0x00ffffffffffffffUL :
  0xffffffffffffff00UL ;

uintptr_t __stack_chk_guard;

void __init_ssp(void *entropy)
{
	if (entropy) memcpy(&__stack_chk_guard, entropy, sizeof(uintptr_t));
	else __stack_chk_guard = (uintptr_t)&__stack_chk_guard * 1103515245;

	__pthread_self()->canary = __stack_chk_guard & canary_mask;
}

void __stack_chk_fail(void)
{
	a_crash();
}

hidden void __stack_chk_fail_local(void);

weak_alias(__stack_chk_fail, __stack_chk_fail_local);