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| | #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);
|