jehanne/sys/src/lib/jehanne/amd64/stackchk.c

44 lines
1.2 KiB
C

/*
* This file is part of Jehanne.
*
* Copyright (C) 2015-2016 Giacomo Tesio <giacomo@tesio.it>
*
* Jehanne is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* Jehanne is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
*/
#include <u.h>
#include <libc.h>
#if defined(__SSP__) || defined(__SSP_ALL__) || defined(__SSP_STRONG__)
#define STACK_CHK_GUARD 0x2101170925071803
uintptr_t __stack_chk_guard = STACK_CHK_GUARD;
__attribute__((noreturn))
void
__stack_chk_fail(void)
{
#if __STDC_HOSTED__
abort();
__builtin_unreachable();
#else
extern void panic(char *fmt, ...) __attribute__ ((noreturn));
panic("Stack smashing detected");
#endif
}
#else /* no stack protector */
uintptr_t __stack_chk_guard = 0;
#endif