/* $NetBSD: _setjmp.S,v 1.24 2012/07/08 00:59:34 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/cdefs.h>
#include <mips/regnum.h>
#include <mips/asm.h>
#include <machine/setjmp.h>
#include <machine/signal.h> /* XXX */
#include "assym.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 1.24 2012/07/08 00:59:34 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, 0xACEDBADE # sigcontext magic number
REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address
REG_S v0, _OFFSETOF_SC_REGS(a0) # saved in sc_regs[0]
REG_S s0, _OFFSETOF_SC_REGS_S0(a0)
REG_S s1, _OFFSETOF_SC_REGS_S1(a0)
REG_S s2, _OFFSETOF_SC_REGS_S2(a0)
REG_S s3, _OFFSETOF_SC_REGS_S3(a0)
REG_S s4, _OFFSETOF_SC_REGS_S4(a0)
REG_S s5, _OFFSETOF_SC_REGS_S5(a0)
REG_S s6, _OFFSETOF_SC_REGS_S6(a0)
REG_S s7, _OFFSETOF_SC_REGS_S7(a0)
REG_S sp, _OFFSETOF_SC_REGS_SP(a0)
REG_S s8, _OFFSETOF_SC_REGS_S8(a0)
#if defined(__mips_n32) || defined(__mips_n64)
REG_S gp, _OFFSETOF_SC_REGS_GP(a0) # newabi gp is callee-saved
#endif
/*
* In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
* In N64, FP registers F23 .. F31 are callee-saved.
* In O32, FP registers F20 .. F23 are callee-saved.
*/
#ifndef SOFTFLOAT_FOR_GCC
cfc1 v0, $31 # too bad cant check if FP used
#if defined(__mips_n64) || defined(__mips_n32)
FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0)
FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0)
FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0)
FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0)
#endif
#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0)
FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0)
#endif
#if defined(__mips_o32) || defined(__mips_o64)
FP_S $f21, _OFFSETOF_SC_FPREGS_F21(a0)
FP_S $f23, _OFFSETOF_SC_FPREGS_F23(a0)
#endif
#if defined(__mips_n64)
FP_S $f25, _OFFSETOF_SC_FPREGS_F25(a0)
FP_S $f27, _OFFSETOF_SC_FPREGS_F27(a0)
FP_S $f29, _OFFSETOF_SC_FPREGS_F29(a0)
FP_S $f31, _OFFSETOF_SC_FPREGS_F31(a0)
#endif
INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
#endif /* SOFTFLOAT_FOR_GCC */
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, _OFFSETOF_SC_REGS(a0) # get magic number
REG_L ra, _OFFSETOF_SC_PC(a0)
REG_LI t0, 0xACEDBADE
bne v0, t0, botch # jump if error
PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity
REG_S a1, _OFFSETOF_SC_REGS_V0(a0) # save return value
REG_L s0, _OFFSETOF_SC_REGS_S0(a0)
REG_L s1, _OFFSETOF_SC_REGS_S1(a0)
REG_L s2, _OFFSETOF_SC_REGS_S2(a0)
REG_L s3, _OFFSETOF_SC_REGS_S3(a0)
REG_L s4, _OFFSETOF_SC_REGS_S4(a0)
REG_L s5, _OFFSETOF_SC_REGS_S5(a0)
REG_L s6, _OFFSETOF_SC_REGS_S6(a0)
REG_L s7, _OFFSETOF_SC_REGS_S7(a0)
#if defined(__mips_n32) || defined(__mips_n64)
REG_L gp, _OFFSETOF_SC_REGS_GP(a0)
#endif
#ifndef SOFTFLOAT_FOR_GCC
# get fpu status
INT_L v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
#endif
REG_L sp, _OFFSETOF_SC_REGS_SP(a0)
REG_L s8, _OFFSETOF_SC_REGS_S8(a0)
#ifndef SOFTFLOAT_FOR_GCC
ctc1 v0, $31
/*
* In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved.
* In N64, FP registers F23 .. F31 are callee-saved.
* In O32, FP registers F20 .. F23 are callee-saved.
*/
#if defined(__mips_n64) || defined(__mips_n32)
FP_L $f30, _OFFSETOF_SC_FPREGS_F30(a0)
FP_L $f28, _OFFSETOF_SC_FPREGS_F28(a0)
FP_L $f26, _OFFSETOF_SC_FPREGS_F26(a0)
FP_L $f24, _OFFSETOF_SC_FPREGS_F24(a0)
#endif
#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64)
FP_L $f22, _OFFSETOF_SC_FPREGS_F22(a0)
FP_L $f20, _OFFSETOF_SC_FPREGS_F20(a0)
#endif
#if defined(__mips_o32) || defined(__mips_o64)
FP_L $f21, _OFFSETOF_SC_FPREGS_F21(a0)
FP_L $f23, _OFFSETOF_SC_FPREGS_F23(a0)
#endif
#if defined(__mips_n64)
FP_L $f25, _OFFSETOF_SC_FPREGS_F25(a0)
FP_L $f27, _OFFSETOF_SC_FPREGS_F27(a0)
FP_L $f29, _OFFSETOF_SC_FPREGS_F29(a0)
FP_L $f31, _OFFSETOF_SC_FPREGS_F31(a0)
#endif
#endif /* SOFTFLOAT_FOR_GCC */
REG_EPILOGUE
j ra
move v0, a1 # get return value in 1st arg
botch:
/*
* We know we aren't returning so we don't care about restoring
* our caller's GP.
*/
jal _C_LABEL(longjmperror)
nop
PIC_TAILCALL(abort)
nop
END(_longjmp)