/* $NetBSD: __setjmp14.S,v 1.6 2016/07/16 09:51:13 skrll Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matthew Fredette.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
/* XXX fredette - this is awful */
#define _LOCORE
#include <machine/frame.h>
#undef _LOCORE
#include <machine/psl.h>
#if defined(LIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: __setjmp14.S,v 1.6 2016/07/16 09:51:13 skrll Exp $")
#endif /* LIBC_SCCS and not lint */
/*
* 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(__setjmp14,0)
/* Finish our stack frame. */
stw %rp, HPPA_FRAME_CRP(%sp)
stw %arg0, HPPA_FRAME_ARG(0)(%sp)
/* A sigcontext is at the beginning of our jmp_buf. */
stw %r0, 4(%arg0) ; unused word (old style signal mask)
stw %sp, 8(%arg0) ; sc.sc_sp = %sp
stw %r0, 16(%arg0) ; sc.sc_ap = NULL
mfsp %sr0, %r1
stw %r1, 20(%arg0) ; sc.sc_pcsqh = %sr0
stw %rp, 24(%arg0) ; sc.sc_pcoqh = %rp
stw %r1, 28(%arg0) ; sc.sc_pcsqh = %sr0
ldo 4(%rp), %r1
stw %r1, 32(%arg0) ; sc.sc_pcoqt = %rp + 4
ldil L%PSW_MBS, %r1
ldo R%PSW_MBS(%r1), %r1
stw %r1, 36(%arg0) ; set sc.sc_ps
/* We store all callee-saved registers after the sigcontext. */
ldo 56(%arg0), %r1
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)
/*
* Start the stack frame for the calls we will make.
* The minimum frame is 48 bytes, but the stack must
* always be 64-byte aligned; we use the top 4 bytes
* to save our caller's %r3, and the following 12 bytes
* as the stack_t for our sigaltstack call.
* XXX - this assumes that sizeof(stack_t) <= 12
*/
copy %r3, %r1
copy %sp, %r3
stwm %r1, HPPA_FRAME_SIZE(%sp)
/* Get signal stack info. */
ldo 4(%r3), %arg1 ; set up oss
bl __sigaltstack14, %rp
copy %r0, %arg0 ; set up ss
/* Recover our jmp_buf and extract SS_ONSTACK */
ldw HPPA_FRAME_ARG(0)(%r3), %arg0
ldw 12(%r3), %r1 ; get ss_flags
ldi 1, %r20 ; SS_ONSTACK
and %r1, %r20, %r1
stw %r1, 0(%arg0) ; sc.sc_onstack
/* Get the signal mask. */
ldo 40(%arg0), %arg2 ; oset = &sc.sc_mask
copy %r0, %arg1 ; set = NULL
bl __sigprocmask14, %rp
copy %r0, %arg0 ; action = 0 <ignored>
/* Return 0. */
ldo HPPA_FRAME_SIZE(%r3),%sp
ldwm -HPPA_FRAME_SIZE(%sp),%r3
ldw HPPA_FRAME_CRP(%sp), %rp
bv %r0(%rp)
copy %r0, %ret0
EXIT(__setjmp14)
.end