cosmopolitan/libc/stubs/stackchkguard.S

42 lines
2.4 KiB
ArmAsm

/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program 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. │
This program 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 this program; if not, write to the Free Software │
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "libc/macros.h"
#include "libc/notice.inc"
.source __FILE__
/ Canary for -fstack-protector.
/
/ This global is referenced by synthetic code generated by GCC.
/ The -mstack-protector-guard=global flag might need to be passed.
/
/ @note this value is protected by piro
.initbss 200,_init___stack_chk_guard
__stack_chk_guard:
.quad 0
.endobj __stack_chk_guard,globl
.previous
.init.start 301,_init___stack_chk_guard
rdtsc
stosl
xchg %edx,%eax
stosl
.init.end 301,_init___stack_chk_guard