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/* $NetBSD: compat_setjmp.S,v 1.2 2009/12/14 03:04:33 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 <sys/syscall.h>
#include <mips/asm.h>
#include "assym.h"
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
RCSID("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
#else
RCSID("$NetBSD: compat_setjmp.S,v 1.2 2009/12/14 03:04:33 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,
* and a struct sigcontext, see <signal.h>
*/
#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + STACK_T_SIZE)
NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra)
.mask 0x80010000, (CALLFRAME_RA - CALLFRAME_SIZ)
SETUP_GP
PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
SAVE_GP(CALLFRAME_GP)
SETUP_GP64(CALLFRAME_GP, setjmp)
REG_S ra, CALLFRAME_RA(sp) # save RA
REG_S s0, CALLFRAME_S0(sp) # save S0
move s0, a0 # save sigcontext
/* Get the signal mask. */
move a0, zero # get current sigmask
jal _C_LABEL(sigblock)
nop
INT_S v0, _OFFSETOF_SC_MASK13(s0) # save sc_mask13
/* Get the signal stack. */
move a0, zero
PTR_ADDU a1, sp, CALLFRAME_SIZ # pointer to stack_t
jal _C_LABEL(__sigaltstack14)
move a0, s0 # restore jmpbuf
INT_L v1, CALLFRAME_SIZ+_OFFSETOF_STACK_T_FLAGS(sp)
# get old ss_onstack
and v1, v1, SS_ONSTACK # extract onstack flag
INT_S v1, _OFFSETOF_SC_ONSTACK(a0) # save it in sc_onstack
REG_L s0, CALLFRAME_S0(sp) # restore S0
REG_L ra, CALLFRAME_RA(sp) # restore RA
blt v0, zero, botch # check for sigaltstack() error
nop
/*
* We know we won't need this routine's GP anymore.
*/
RESTORE_GP64
PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame
REG_PROLOGUE
REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address
REG_LI v0, 0xACEDBADE # sigcontext magic number
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 gp, _OFFSETOF_SC_REGS_GP(a0)
REG_S sp, _OFFSETOF_SC_REGS_SP(a0)
REG_S s8, _OFFSETOF_SC_REGS_S8(a0)
li v0, 1 # be nice if we could tell
INT_S v0, _OFFSETOF_SC_FPUSED(a0) # sc_fpused = 1
cfc1 v0, $31
INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0)
#if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32)
FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0)
FP_S $f22, _OFFSETOF_SC_FPREGS_F22(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_n32) || defined(__mips_n64)
FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0)
FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0)
FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0)
FP_S $f30, _OFFSETOF_SC_FPREGS_F30(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
REG_EPILOGUE
j ra
move v0, zero
botch:
jal _C_LABEL(abort)
END(setjmp)
LEAF(longjmp)
SETUP_GP
PTR_SUBU sp, sp, CALLFRAME_SIZ
SAVE_GP(CALLFRAME_S0)
SETUP_GP64(s0, longjmp)
REG_PROLOGUE
/* save return value in sc_regs[_R_V0] */
REG_S a1, _OFFSETOF_SC_REGS_V0(a0)
REG_EPILOGUE
li v0, SYS_compat_13_sigreturn13
syscall
jal _C_LABEL(longjmperror)
jal _C_LABEL(abort)
END(longjmp)
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