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| | #include <string.h>
#include <stdint.h>
#include "pthread_impl.h"
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;
#if UINTPTR_MAX >= 0xffffffffffffffff
/* Sacrifice 8 bits of entropy on 64bit to prevent leaking/overwriting the
* canary via string-manipulation functions. The NULL byte is on the second
* byte so that off-by-ones can still be detected. Endianness is taken care
* of automatically. */
((char *)&__stack_chk_guard)[1] = 0;
#endif
__pthread_self()->canary = __stack_chk_guard;
}
void __stack_chk_fail(void)
{
a_crash();
}
hidden void __stack_chk_fail_local(void);
weak_alias(__stack_chk_fail, __stack_chk_fail_local);
|