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/* $OpenBSD: setjmp.S,v 1.2 2005/08/07 16:40:14 espie Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <machine/asm.h>
#define _LOCORE
#include <machine/frame.h>
#undef _LOCORE
/*
* C library -- setjmp, longjmp
*
* longjmp(a,v)
* will generate a "return(v)" from
* the last call to
* setjmp(a)
* by restoring registers from the stack,
* and a struct sigcontext, see <signal.h>
*/
ENTRY(sigsetjmp, 64)
sub,<> %r0, %arg1, %r0
b,n _setjmp
nop
stw %arg1, 44(%arg0) ; last of reserved words
ALTENTRY(setjmp)
stw %rp, HPPA_FRAME_CRP(%sp)
stw %arg0, HPPA_FRAME_ARG(0)(%sp)
copy %r3, %r1
copy %sp, %r3
stw,ma %r1, HPPA_FRAME_SIZE(%sp)
bl sigblock, %rp
copy %r0, %arg0
ldo HPPA_FRAME_SIZE(%r3), %sp
ldw,mb -HPPA_FRAME_SIZE(%sp),%r3
ldw HPPA_FRAME_CRP(%sp), %rp
ldw HPPA_FRAME_ARG(0)(%sp), %arg0
stw %r0, 0(%arg0) ; no onstack
b _setjmp$dosaves
stw %ret0, 4(%arg0) ; mask
ALTENTRY(_setjmp)
/* A sigcontext is at the beginning of our jmp_buf. */
stw %r0, 0(%arg0) ; no onstack
stw %r0, 4(%arg0) ; mask
_setjmp$dosaves
stw %r0, 8(%arg0) ; set sc.sc_ps
stw %sp, 12(%arg0) ; sc.sc_sp = %sp
stw %r0, 16(%arg0) ; sc.sc_fp
ldo 4(%rp), %r1
stw %rp, 20(%arg0) ; sc.sc_pcoqh = %rp
stw %r1, 24(%arg0) ; sc.sc_pcoqt = %rp + 4
/* We store all callee-saved registers after the sigcontext. */
ldo 48(%arg0), %r1 ; offset to after sc
stwm %r3, 4(%r1)
stwm %r4, 4(%r1)
stwm %r5, 4(%r1)
stwm %r6, 4(%r1)
stwm %r7, 4(%r1)
stwm %r8, 4(%r1)
stwm %r9, 4(%r1)
stwm %r10, 4(%r1)
stwm %r11, 4(%r1)
stwm %r12, 4(%r1)
stwm %r13, 4(%r1)
stwm %r14, 4(%r1)
stwm %r15, 4(%r1)
stwm %r16, 4(%r1)
stwm %r17, 4(%r1)
stwm %r18, 4(%r1)
/* Return 0. */
bv %r0(%rp)
copy %r0, %ret0
EXIT(_setjmp)
ENTRY(siglongjmp,64)
/* XXX have to dup this from below */
sub,>> %sp, %arg0, %r0 /* botch if jbuf was on stack */
bl,n longjmperror, %rp
nop
ldw 16(%arg0), %r1 /* botch if it's a real signal frame */
add,= %r0, %r1, %r0
bl,n longjmperror, %rp
nop
ldw 44(%arg0), %arg2
sub,<> %r0, %arg2, %r0
b _longjmp
nop
ALTENTRY(longjmp)
/* XXX have to dup this from below */
sub,>> %sp, %arg0, %r0 /* botch if jbuf was on stack */
bl,n longjmperror, %rp
nop
ldw 16(%arg0), %r1 /* botch if it's a real signal frame */
add,= %r0, %r1, %r0
bl,n longjmperror, %rp
nop
stw %rp, HPPA_FRAME_CRP(%sp)
stw %arg0, HPPA_FRAME_ARG(0)(%sp)
stw %arg1, HPPA_FRAME_ARG(1)(%sp)
copy %r3, %r1
copy %sp, %r3
stw,ma %r1, HPPA_FRAME_SIZE(%sp)
bl sigsetmask, %rp
ldw 4(%arg0), %arg0
ldo HPPA_FRAME_SIZE(%r3), %sp
ldw,mb -HPPA_FRAME_SIZE(%sp),%r3
ldw HPPA_FRAME_CRP(%sp), %rp
ldw HPPA_FRAME_ARG(0)(%sp), %arg0
b _longjmp$restores
ldw HPPA_FRAME_ARG(1)(%sp), %arg1
ALTENTRY(_longjmp)
sub,>> %sp, %arg0, %r0 /* botch if jbuf was on stack */
bl,n longjmperror, %rp
nop
ldw 16(%arg0), %r1 /* botch if it's a real signal frame */
add,= %r0, %r1, %r0
bl,n longjmperror, %rp
nop
_longjmp$restores
/* restore callee-saved registers */
ldo 48(%arg0), %r1
ldwm 4(%r1), %r3
ldwm 4(%r1), %r4
ldwm 4(%r1), %r5
ldwm 4(%r1), %r6
ldwm 4(%r1), %r7
ldwm 4(%r1), %r8
ldwm 4(%r1), %r9
ldwm 4(%r1), %r10
ldwm 4(%r1), %r11
ldwm 4(%r1), %r12
ldwm 4(%r1), %r13
ldwm 4(%r1), %r14
ldwm 4(%r1), %r15
ldwm 4(%r1), %r16
ldwm 4(%r1), %r17
ldwm 4(%r1), %r18
/* restore the rest */
ldw 12(%arg0), %sp
ldw 20(%arg0), %rp /* check the priv level */
sub,<> %arg1, %r0, %r0
ldo 1(%arg1), %arg1
bv %r0(%rp)
copy %arg1, %ret0
EXIT(_longjmp)
.end
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