/* Copyright (C) 1992, 1994, 1997, 2006, 2010 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sysdep.h>
#include <jmpbuf-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


/* Jump to the position specified by ENV, causing the
   setjmp call there to return VAL, or 1 if VAL is 0.
   void __longjmp (__jmp_buf env, int val).  */
	.text
	.align	4
	.globl	____longjmp_chk
	.type	____longjmp_chk, @function
	.usepv	____longjmp_chk, std

	cfi_startproc
____longjmp_chk:
	ldgp    gp, 0(pv)
#ifdef PROF
	.set noat
	lda     AT, _mcount
	jsr     AT, (AT), _mcount
	.set at
#endif

	ldq     s2, JB_PC*8(a0)
	mov	a0, s0
	ldq     fp, JB_FP*8(a0)
	mov     a1, s1
	ldq     s3, JB_SP*8(a0)
	cmoveq  s1, 1, s1

#ifdef PTR_DEMANGLE
	PTR_DEMANGLE(s2, t1)
	PTR_DEMANGLE2(s3, t1)
	PTR_DEMANGLE2(fp, t1)
#endif
	cmpule	t0, sp, t1
	bne	t1, .Lfail

	.align	4
.Lok:
	mov	s0, a0
	mov	s1, v0
	mov	s3, t0
	mov	s2, ra
	cfi_remember_state
	cfi_def_cfa(a0, 0)
	cfi_register(sp, t0)
	cfi_offset(s0, JB_S0*8)
	cfi_offset(s1, JB_S1*8)
	cfi_offset(s2, JB_S2*8)
	cfi_offset(s3, JB_S3*8)
	cfi_offset(s4, JB_S4*8)
	cfi_offset(s5, JB_S5*8)
	cfi_offset(s3, JB_S3*8)
	cfi_offset($f2, JB_F2*8)
	cfi_offset($f3, JB_F3*8)
	cfi_offset($f4, JB_F4*8)
	cfi_offset($f5, JB_F5*8)
	cfi_offset($f6, JB_F6*8)
	cfi_offset($f7, JB_F7*8)
	cfi_offset($f8, JB_F8*8)
	cfi_offset($f9, JB_F9*8)
	ldq	s0, JB_S0*8(a0)
	ldq	s1, JB_S1*8(a0)
	ldq	s2, JB_S2*8(a0)
	ldq	s3, JB_S3*8(a0)
	ldq	s4, JB_S4*8(a0)
	ldq	s5, JB_S5*8(a0)
	ldt     $f2, JB_F2*8(a0)
	ldt     $f3, JB_F3*8(a0)
	ldt     $f4, JB_F4*8(a0)
	ldt     $f5, JB_F5*8(a0)
	ldt     $f6, JB_F6*8(a0)
	ldt     $f7, JB_F7*8(a0)
	ldt     $f8, JB_F8*8(a0)
	ldt     $f9, JB_F9*8(a0)
	mov     t0, sp
	ret

	.align	4
.Lfail:
	cfi_restore_state
	lda	v0, __NR_sigaltstack
	lda	a0, 0
	lda	a1, -32(sp)
	lda	sp, -32(sp)
	cfi_adjust_cfa_offset(32)
	callsys
	ldq	t0, 0(sp)	/* ss_sp */
	ldl	t1, 8(sp)	/* ss_flags */
	ldq	t2, 16(sp)	/* ss_size */
	lda	sp, 32(sp)
	cfi_adjust_cfa_offset(-32)

	/* Without working sigaltstack we cannot perform the test.  */
	bne	a3, .Lok

	addq	t0, t2, t0	/* t0 = ss_sp + ss_size */
	subq	t0, s3, t0	/* t0 = (ss_sp + ss_size) - new_sp */
	cmpule	t2, t0, t0	/* t0 = (t0 >= ss_size) */
	and	t0, t1, t0	/* t0 = (t0 >= ss_size) & (ss_flags & SS_ONSTACK) */
	bne	t0, .Lok

	ldah	a0, longjmp_msg(gp)	!gprelhigh
	lda	a0, longjmp_msg(a0)	!gprellow
#ifdef PIC
	jsr	ra, HIDDEN_JUMPTARGET(__fortify_fail)
#else
	bsr	ra, HIDDEN_JUMPTARGET(__fortify_fail)	!samegp
#endif
	bugchk

	cfi_endproc
	.size	____longjmp_chk, .-____longjmp_chk
