/* Copyright (C) 2009-2018 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

#define __longjmp ____longjmp_chk

#ifdef PIC

# define CALL_FAIL						\

	ldr	sl, .L_GOT;					\

	cfi_undefined (sl);					\

.L_GOT_OFF:							\

	add	sl, pc, sl;					\

	ldr	r0, .Lstr;					\

	add	r0, sl, r0;					\

	B	PLTJMP(HIDDEN_JUMPTARGET(__fortify_fail));	\

.L_GOT:								\

	.word	_GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+8);		\

.Lstr:								\

	.word	longjmp_msg(GOTOFF);

#else

# define CALL_FAIL					\

	ldr	r0, .Lstr;				\

	B	HIDDEN_JUMPTARGET(__fortify_fail);	\

.Lstr:							\

	.word	longjmp_msg;

#endif

#define CHECK_SP(reg)				\

	cfi_remember_state;			\

	cmp	sp, reg;			\

	bls	.Lok;				\

	push	{ r7 };				\

	cfi_adjust_cfa_offset (4);		\

	cfi_rel_offset (r7, 0);			\

	mov	r5, r0;				\

	cfi_undefined (r5);			\

	mov	r7, #SYS_ify(sigaltstack);	\

	mov	r0, #0;				\

	sub	sp, sp, #12; /* == sizeof (stack_t) */ \

	cfi_adjust_cfa_offset (12);		\

	cfi_remember_state;			\

	mov	r1, sp;				\

	swi	#0;				\

	cmp	r0, #0;				\

	bne	.Lok2;				\

	ldr	r1, [sp, #4];			\

	tst	r1, #1;				\

	beq	.Lfail;				\

	ldr	r2, [sp, #0];			\

	ldr	r3, [sp, #8];			\

	add	r2, r2, r3;			\

	sub	r2, r2, reg;			\

	cmp	r2, r3;				\

	bhi	.Lok2;				\

.Lfail:						\

	add	sp, sp, #12;			\

	cfi_adjust_cfa_offset (-12);		\

	pop	{ r7 };				\

	cfi_adjust_cfa_offset (-4);		\

	cfi_restore (r7);			\

	CALL_FAIL				\

	cfi_restore_state;			\

.Lok2:						\

	mov	r0, r5;				\

	cfi_restore_state;			\

.Lok:

#include <__longjmp.S>