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/* $NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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>
__FBSDID("$FreeBSD$");
#include <machine/regnum.h>
#include "SYS.h"
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93")
#else
RCSID("$NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $")
#endif
#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,
* The previous signal state is NOT restored.
*/
.set noreorder
LEAF(_setjmp)
REG_PROLOGUE
REG_LI v0, _JB_MAGIC__SETJMP # sigcontext magic number
REG_S v0, (_JB_MAGIC * SZREG)(a0)
REG_S ra, (_JB_REG_RA * SZREG)(a0)
/*
* From "MIPSpro N32 ABI Handbook", Table 2-1:
* Registers s0..s7 are callee-saved.
* The sp register is callee-saved.
* The fp (or s8) register is callee-saved.
* The gp register is callee-saved (for n32/n64).
*/
REG_S s0, (_JB_REG_S0 * SZREG)(a0)
REG_S s1, (_JB_REG_S1 * SZREG)(a0)
REG_S s2, (_JB_REG_S2 * SZREG)(a0)
REG_S s3, (_JB_REG_S3 * SZREG)(a0)
REG_S s4, (_JB_REG_S4 * SZREG)(a0)
REG_S s5, (_JB_REG_S5 * SZREG)(a0)
REG_S s6, (_JB_REG_S6 * SZREG)(a0)
REG_S s7, (_JB_REG_S7 * SZREG)(a0)
REG_S sp, (_JB_REG_SP * SZREG)(a0)
REG_S s8, (_JB_REG_S8 * SZREG)(a0)
#if defined(__mips_n32) || defined(__mips_n64)
REG_S gp, (_JB_REG_GP * SZREG)(a0) # newabi gp is callee-saved
#endif
/*
* From "MIPSpro N32 ABI Handbook", Table 2-1:
* In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
* In N64, FP registers F24 .. F31 are callee-saved.
* In O32, FP registers F20 .. F23 are callee-saved.
*/
#ifndef SOFTFLOAT
cfc1 v0, $31 # too bad can't check if FP used
#if defined(__mips_n64) || defined(__mips_n32)
FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0)
FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0)
FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0)
FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0)
#endif
#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0)
FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0)
#endif
#if defined(__mips_o32) || defined(__mips_o64)
FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0)
FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0)
#endif
#if defined(__mips_n64)
FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0)
FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0)
FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0)
FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0)
#endif
INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0)
#endif /* ! SOFTFLOAT */
REG_EPILOGUE
j ra
move v0, zero
END(_setjmp)
LEAF(_longjmp)
PIC_PROLOGUE(_longjmp)
PTR_SUBU sp, sp, CALLFRAME_SIZ
SAVE_GP(CALLFRAME_GP)
REG_PROLOGUE
REG_L v0, (_JB_MAGIC * SZREG)(a0) # get magic number
REG_L ra, (_JB_REG_RA * SZREG)(a0)
REG_LI t0, _JB_MAGIC__SETJMP
bne v0, t0, botch # jump if error
PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity
/*
* From "MIPSpro N32 ABI Handbook", Table 2-1:
* Registers s0..s7 are callee-saved.
* The sp register is callee-saved.
* The fp (or s8) register is callee-saved.
* The gp register is callee-saved (for n32/n64).
*/
REG_L s0, (_JB_REG_S0 * SZREG)(a0)
REG_L s1, (_JB_REG_S1 * SZREG)(a0)
REG_L s2, (_JB_REG_S2 * SZREG)(a0)
REG_L s3, (_JB_REG_S3 * SZREG)(a0)
REG_L s4, (_JB_REG_S4 * SZREG)(a0)
REG_L s5, (_JB_REG_S5 * SZREG)(a0)
REG_L s6, (_JB_REG_S6 * SZREG)(a0)
REG_L s7, (_JB_REG_S7 * SZREG)(a0)
REG_L sp, (_JB_REG_SP * SZREG)(a0)
REG_L s8, (_JB_REG_S8 * SZREG)(a0)
#if defined(__mips_n32) || defined(__mips_n64)
REG_L gp, (_JB_REG_GP * SZREG)(a0)
#endif
#ifndef SOFTFLOAT
# get fpu status
INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0)
ctc1 v0, $31
/*
* From "MIPSpro N32 ABI Handbook", Table 2-1:
* In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
* In N64, FP registers F24 .. F31 are callee-saved.
* In O32, FP registers F20 .. F23 are callee-saved.
*/
#if defined(__mips_n64) || defined(__mips_n32)
FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0)
FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0)
FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0)
FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0)
#endif
#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0)
FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0)
#endif
#if defined(__mips_o32) || defined(__mips_o64)
FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0)
FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0)
#endif
#if defined(__mips_n64)
FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0)
FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0)
FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0)
FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0)
#endif
#endif /* ! SOFTFLOAT */
REG_EPILOGUE
move v0, a1 # get return value in 1st arg
j ra
nop
botch:
/*
* We know we aren't returning so we don't care about restoring
* our caller's GP.
*/
PTR_LA t9, _C_LABEL(longjmperror)
jalr t9
nop
PIC_TAILCALL(abort)
END(_longjmp)
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