* Copyright 2021, Jérôme Duval, jerome.duval@gmail.com.
* Distributed under the terms of the MIT License.
*/
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/cdefs.h>
extern "C" {
long __stack_chk_guard = 0;
void
__init_stack_protector()
{
if (__stack_chk_guard != 0)
return;
bool done = false;
int fd = open("/dev/random", O_RDONLY, 0);
if (fd >= 0) {
done = read(fd, &__stack_chk_guard, sizeof(__stack_chk_guard))
== sizeof(__stack_chk_guard);
close(fd);
}
if (!done) {
((unsigned char *)(void *)__stack_chk_guard)[0] = 0;
((unsigned char *)(void *)__stack_chk_guard)[1] = 0;
((unsigned char *)(void *)__stack_chk_guard)[2] = '\n';
((unsigned char *)(void *)__stack_chk_guard)[3] = 0xff;
}
}
void
__stack_chk_fail()
{
sigset_t mask;
sigfillset(&mask);
sigdelset(&mask, SIGABRT);
sigprocmask(SIG_BLOCK, &mask, NULL);
abort();
}
}
#if __GNUC__ >= 4
extern "C" void __stack_chk_fail_local() __attribute__((visibility("hidden")));
__weak_reference(__stack_chk_fail, __stack_chk_fail_local);
#endif
