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/* longjmp that validates stack addresses. ARM/NaCl version.
Copyright (C) 2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
.section .rodata.str1.1,"aMS",%progbits,1
.type longjmp_msg,%object
longjmp_msg:
.string "longjmp causes uninitialized stack frame"
.size longjmp_msg, .-longjmp_msg
.text
/* We don't have sigaltstack and so any longjmp must be to an outer frame. */
.macro check_sp reg
cmp sp, \reg
bls .Lok
#ifdef PIC
movw r0, #:lower16:longjmp_msg-(.LPIC0+8)
movt r0, #:upper16:longjmp_msg-(.LPIC0+8)
.LPIC0: add r0, r0, pc
#else
movw r0, #:lower16:longjmp_msg
movt r0, #:upper16:longjmp_msg
#endif
b HIDDEN_JUMPTARGET(__fortify_fail)
.Lok:
.endm
#define CHECK_SP(reg) check_sp reg
#define __longjmp ____longjmp_chk
#include <__longjmp.S>
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