/* 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>

#include <sigaltstack-offsets.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 \

	mov.l	.Lfail, r1;				\

	mov.l	.Lstr, r4;				\

	mov.l	r12, @-r15;				\

	cfi_remember_state;				\

	cfi_adjust_cfa_offset (4);			\

	cfi_rel_offset (r12, 0);			\

	mova	.Lgot, r0;				\

	mov.l	.Lgot, r12;				\

	add	r0, r12;				\

	sts.l	pr, @-r15;				\

	cfi_adjust_cfa_offset (4);			\

	cfi_rel_offset (pr, 0);				\

	bsrf	r1;					\

	 add	r12, r4;				\

.Lfail0:						\

	/* Unreachable.	 */				\

	.align	2;					\

.Lgot:							\

	.long	_GLOBAL_OFFSET_TABLE_;			\

.Lstr:							\

	.long	longjmp_msg@GOTOFF;			\

.Lfail:							\

	.long	__GI___fortify_fail@PLT-(.Lfail0-.);	\

	cfi_restore_state;

#else

# define CALL_FAIL \

	mov.l	.Lfail, r1;				\

	mov.l	.Lstr, r4;				\

	sts.l	pr, @-r15;				\

	cfi_remember_state;				\

	cfi_adjust_cfa_offset (4);			\

	cfi_rel_offset (pr, 0);				\

	jsr	@r1;					\

	 nop;						\

	/* Unreachable.	 */				\

	.align	2;					\

.Lstr:							\

	.long	longjmp_msg;				\

.Lfail:							\

	.long	__fortify_fail;				\

	cfi_restore_state;

#endif

#define CHECK_SP(reg) \

	/* Jumping to a higher-address frame is always allowed.	 */	\

	cmp/hs	r15, reg;						\

	bt	.Lok;							\

									\

	mov.l	r0, @-r15; /* The return value is already in here.  */	\

	cfi_adjust_cfa_offset (4);					\

	mov.l	r1, @-r15; /* PTR_DEMANGLE helper.  */			\

	cfi_adjust_cfa_offset (4);					\

	mov.l	r2, @-r15; /* The new SP value is already in here.  */	\

	cfi_adjust_cfa_offset (4);					\

	mov.l	r4, @-r15; /* We'll still need this one.  */		\

	cfi_adjust_cfa_offset (4);					\

	add	#-sizeSS, r15;						\

	cfi_adjust_cfa_offset (sizeSS);					\

	mov	#0, r4;							\

	mov	r15, r5;						\

	DO_CALL (sigaltstack, 2);					\

	/* Without working sigaltstack we cannot perform the test.  */	\

	tst	r0, r0;							\

	bf	.Lok2;							\

	mov.l	@(oSS_FLAGS, r15), r0;					\

	tst	#SS_ONSTACK, r0;					\

	bt	.Lcall_fail;						\

	mov.l	@(oSS_SIZE, r15), r2;					\

	mov.l	@(oSS_SP, r15), r1;					\

	add	r2, r1;							\

	sub	r8, r1;							\

	cmp/hi	r1, r2;							\

	bf	.Lok2;							\

.Lcall_fail:								\

	CALL_FAIL							\

									\

.Lok2:									\

	add	#sizeSS, r15;						\

	cfi_adjust_cfa_offset (-sizeSS);				\

	mov.l	@r15+, r4;						\

	cfi_adjust_cfa_offset (-4);					\

	mov.l	@r15+, r2;						\

	cfi_adjust_cfa_offset (-4);					\

	mov.l	@r15+, r1;						\

	cfi_adjust_cfa_offset (-4);					\

	mov.l	@r15+, r0;						\

	cfi_adjust_cfa_offset (-4);					\

.Lok:

#include <__longjmp.S>