glibc/sysdeps/unix/sysv/linux/ia64/setjmp.S

/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   The layout of the jmp_buf is as follows.  This is subject to change
   and user-code should never depend on the particular layout of
   jmp_buf!
  

  	offset:	description:
	-------	------------
  	0x000	stack pointer (r12)	; unchangeable (see _JMPBUF_UNWINDS)
  	0x008	r1 (gp)
	0x010	caller's unat
	0x018	fpsr
  	0x020	r4
  	0x028	r5
  	0x030	r6
  	0x038	r7
  	0x040	rp (b0)
  	0x048	b1
  	0x050	b2
  	0x058	b3
  	0x060	b4
  	0x068	b5
  	0x070	ar.pfs
  	0x078	ar.lc
  	0x080	pr
  	0x088	ar.bsp			; unchangeable (see __longjmp.S)
  	0x090	ar.unat
	0x098	&__jmp_buf	; address of the jmpbuf (needed to locate NaT bits in unat)
	0x0a0	 f2
	0x0b0	 f3
	0x0c0	 f4
	0x0d0	 f5
	0x0e0	f16
  	0x0f0	f17
  	0x100	f18
  	0x110	f19
  	0x120	f20
  	0x130	f21
  	0x130	f22
  	0x140	f23
  	0x150	f24
  	0x160	f25
  	0x170	f26
  	0x180	f27
  	0x190	f28
  	0x1a0	f29
  	0x1b0	f30
  	0x1c0	f31 */

#include <sysdep.h>
#include <features.h>

	.text
	.psr abi64
	.psr lsb
	.lsb

	/* The following two entry points are the traditional entry points: */

	.global setjmp
	.proc setjmp
setjmp:	alloc r8=ar.pfs,2,0,0,0
	mov in1=1
	br.cond.sptk.many __sigsetjmp
	.endp setjmp

	.global __setjmp
	.proc __setjmp
__setjmp:
	alloc r8=ar.pfs,2,0,0,0
	mov in1=0
	br.cond.sptk.many __sigsetjmp
	.endp __setjmp

	/* __sigsetjmp(__jmp_buf buf, int savemask) */
	.align 32
	.global __sigsetjmp
	.proc __sigsetjmp
__sigsetjmp:
	alloc loc0=ar.pfs,2,2,2,0
	mov r16=ar.unat
	;;
	mov r17=ar.fpsr
	mov r2=in0
	add r3=8,in0
	;;
	st8.spill.nta [r2]=sp,16	// r12 (sp)
	st8.spill.nta [r3]=gp,16	// r1 (gp)
	;;
	st8.nta [r2]=r16,16		// save caller's unat
	st8.nta [r3]=r17,16		// save fpsr
	add r8=0xa0,in0
	;;
	st8.spill.nta [r2]=r4,16	// r4
	st8.spill.nta [r3]=r5,16	// r5
	add r9=0xb0,in0
	;;
	stf.spill.nta [r8]=f2,32
	stf.spill.nta [r9]=f3,32
	mov loc1=rp
	;;
	stf.spill.nta [r8]=f4,32
	stf.spill.nta [r9]=f5,32
	mov r17=b1
	;;
	stf.spill.nta [r8]=f16,32
	stf.spill.nta [r9]=f17,32
	mov r18=b2
	;;
	stf.spill.nta [r8]=f18,32
	stf.spill.nta [r9]=f19,32
	mov r19=b3
	;;
	stf.spill.nta [r8]=f20,32
	stf.spill.nta [r9]=f21,32
	mov r20=b4
	;;
	stf.spill.nta [r8]=f22,32
	stf.spill.nta [r9]=f23,32
	mov r21=b5
	;;
	stf.spill.nta [r8]=f24,32
	stf.spill.nta [r9]=f25,32
	mov r22=ar.lc
	;;
	stf.spill.nta [r8]=f26,32
	stf.spill.nta [r9]=f27,32
	mov r24=pr
	;;
	stf.spill.nta [r8]=f28,32
	stf.spill.nta [r9]=f29,32
	;;
	stf.spill.nta [r8]=f30
	stf.spill.nta [r9]=f31

	st8.spill.nta [r2]=r6,16	// r6
	st8.spill.nta [r3]=r7,16	// r7
	cmp.ne p8,p0=0,in1
	;;
	mov r23=ar.bsp
	mov r25=ar.unat
	mov out0=in0
	mov out1=in1

	st8.nta [r2]=loc1,16		// b0
	st8.nta [r3]=r17,16		// b1
	;;
	st8.nta [r2]=r18,16		// b2
	st8.nta [r3]=r19,16		// b3
	;;
	st8.nta [r2]=r20,16		// b4
	st8.nta [r3]=r21,16		// b5
	;;
	st8.nta [r2]=loc0,16		// ar.pfs
	st8.nta [r3]=r22,16		// ar.lc
	;;
	st8.nta [r2]=r24,16		// pr
	st8.nta [r3]=r23,16		// ar.bsp
	;;
	st8.nta [r2]=r25		// ar.unat
	st8.nta [r3]=in0		// &__jmp_buf
(p8)	br.call.dpnt.few rp=__sigjmp_save
.ret0:					// force a new bundle ::q
	mov r8=0
	mov rp=loc1
	mov ar.pfs=loc0
	ret
	.endp __sigsetjmp

weak_alias(__setjmp, _setjmp)
weak_extern(setjmp)