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/* $NetBSD: _setjmp.S,v 1.2 2015/03/27 06:44:28 matt Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* 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>
#include "assym.h"
#if defined(LIBC_SCCS)
__RCSID("$NetBSD: _setjmp.S,v 1.2 2015/03/27 06:44:28 matt Exp $")
#endif
/*
* C library -- _setjmp, _longjmp
*
* _longjmp(a,v)
* will generate a "return(v?v:1)" from the last call to
* _setjmp(a)
* by restoring registers from the stack.
* The previous signal state is NOT restored.
*/
ENTRY(_setjmp)
REG_S zero, JB_MAGIC(a0) /* indicate no sigmask */
REG_S ra, JB_RA(a0) /* save return address */
REG_S sp, JB_SP(a0) /* save stack pointer */
REG_S gp, JB_GP(a0) /* save global pointer */
REG_S tp, JB_TP(a0) /* save thread pointer */
REG_S s0, JB_S0(a0) /* save callee saved register */
REG_S s1, JB_S1(a0) /* save callee saved register */
REG_S s2, JB_S2(a0) /* save callee saved register */
REG_S s3, JB_S3(a0) /* save callee saved register */
REG_S s4, JB_S4(a0) /* save callee saved register */
REG_S s5, JB_S5(a0) /* save callee saved register */
REG_S s6, JB_S6(a0) /* save callee saved register */
REG_S s7, JB_S7(a0) /* save callee saved register */
REG_S s8, JB_S8(a0) /* save callee saved register */
REG_S s9, JB_S9(a0) /* save callee saved register */
REG_S s10, JB_S10(a0) /* save callee saved register */
REG_S s11, JB_S11(a0) /* save callee saved register */
#ifndef _SOFT_FLOAT
frcsr t2 /* get FSCR */
REG_S t2, JB_FCSR(a0) /* save it */
fsd fs0, JB_FS0(a0) /* save callee saved register */
fsd fs1, JB_FS1(a0) /* save callee saved register */
fsd fs2, JB_FS2(a0) /* save callee saved register */
fsd fs3, JB_FS3(a0) /* save callee saved register */
fsd fs4, JB_FS4(a0) /* save callee saved register */
fsd fs5, JB_FS5(a0) /* save callee saved register */
fsd fs6, JB_FS6(a0) /* save callee saved register */
fsd fs7, JB_FS7(a0) /* save callee saved register */
fsd fs8, JB_FS8(a0) /* save callee saved register */
fsd fs9, JB_FS9(a0) /* save callee saved register */
fsd fs10, JB_FS10(a0) /* save callee saved register */
fsd fs11, JB_FS11(a0) /* save callee saved register */
#endif
li a0, 0 /* indicate success */
ret /* return */
END(_setjmp)
ENTRY(_longjmp)
REG_L ra, JB_RA(a0) /* save return address */
REG_L sp, JB_SP(a0) /* save stack pointer */
REG_L gp, JB_GP(a0) /* save global pointer */
#REG_L tp, JB_TP(a0) /* save thread pointer */
REG_L s0, JB_S0(a0) /* save callee saved register */
REG_L s1, JB_S1(a0) /* save callee saved register */
REG_L s2, JB_S2(a0) /* save callee saved register */
REG_L s3, JB_S3(a0) /* save callee saved register */
REG_L s4, JB_S4(a0) /* save callee saved register */
REG_L s5, JB_S5(a0) /* save callee saved register */
REG_L s6, JB_S6(a0) /* save callee saved register */
REG_L s7, JB_S7(a0) /* save callee saved register */
REG_L s8, JB_S8(a0) /* save callee saved register */
REG_L s9, JB_S9(a0) /* save callee saved register */
REG_L s10, JB_S10(a0) /* save callee saved register */
REG_L s11, JB_S11(a0) /* save callee saved register */
#ifndef _SOFT_FLOAT
REG_L t2, JB_FCSR(a0) /* get it */
fscsr t2 /* restore FSCR */
fld fs0, JB_FS0(a0) /* restore callee saved register */
fld fs1, JB_FS1(a0) /* restore callee saved register */
fld fs2, JB_FS2(a0) /* restore callee saved register */
fld fs3, JB_FS3(a0) /* restore callee saved register */
fld fs4, JB_FS4(a0) /* restore callee saved register */
fld fs5, JB_FS5(a0) /* restore callee saved register */
fld fs6, JB_FS6(a0) /* restore callee saved register */
fld fs7, JB_FS7(a0) /* restore callee saved register */
fld fs8, JB_FS8(a0) /* restore callee saved register */
fld fs9, JB_FS9(a0) /* restore callee saved register */
fld fs10, JB_FS10(a0) /* restore callee saved register */
fld fs11, JB_FS11(a0) /* restore callee saved register */
#endif
li a0, 1 /* default return value */
beqz a1, 1f /* test return value */
move a0, a1 /* use it if not 0 */
1: ret
END(_longjmp)
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