149 lines
5.2 KiB
ArmAsm
149 lines
5.2 KiB
ArmAsm
/* $NetBSD: setjmp.S,v 1.14 2002/11/10 18:10:25 thorpej 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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 <sys/syscall.h>
|
|
#include <mips/regnum.h>
|
|
#include <mips/asm.h>
|
|
#include <machine/signal.h>
|
|
#include <machine/setjmp.h>
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
|
|
ASMSTR("$NetBSD: setjmp.S,v 1.14 2002/11/10 18:10:25 thorpej Exp $")
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#ifdef __ABICALLS__
|
|
.abicalls
|
|
#endif
|
|
|
|
/*
|
|
* 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 + 12)
|
|
|
|
NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra)
|
|
.mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
|
|
#ifdef __ABICALLS__
|
|
.set noreorder
|
|
.cpload t9
|
|
.set reorder
|
|
#endif
|
|
subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
|
|
#ifdef __ABICALLS__
|
|
.cprestore 16
|
|
#endif
|
|
sw ra, CALLFRAME_RA(sp) # save state
|
|
sw a0, SETJMP_FRAME_SIZE(sp)
|
|
move a0, zero # get current signal mask
|
|
jal _C_LABEL(sigblock)
|
|
lw v1, SETJMP_FRAME_SIZE(sp) # v1 = jmpbuf
|
|
sw v0, (1 * 4)(v1) # save sc_mask = sigblock(0)
|
|
move a0, zero
|
|
addu a1, sp, CALLFRAME_SIZ # pointer to struct sigaltstack
|
|
jal _C_LABEL(__sigaltstack14)
|
|
lw a0, SETJMP_FRAME_SIZE(sp) # restore jmpbuf
|
|
lw v1, CALLFRAME_SIZ+8(sp) # get old ss_onstack
|
|
and v1, v1, 1 # extract onstack flag
|
|
sw v1, 0(a0) # save it in sc_onstack
|
|
lw ra, CALLFRAME_RA(sp)
|
|
addu sp, sp, SETJMP_FRAME_SIZE
|
|
blt v0, zero, botch # check for sigstack() error
|
|
REG_PROLOGUE
|
|
REG_S ra, (2 * 4)(a0) # sc_pc = return address
|
|
REG_LI v0, 0xACEDBADE # sigcontext magic number
|
|
REG_S v0, (_OFFSETOF_SC_REGS + SZREG * ZERO)(a0) # saved in sc_regs[0]
|
|
REG_S s0, (_OFFSETOF_SC_REGS + SZREG * S0)(a0)
|
|
REG_S s1, (_OFFSETOF_SC_REGS + SZREG * S1)(a0)
|
|
REG_S s2, (_OFFSETOF_SC_REGS + SZREG * S2)(a0)
|
|
REG_S s3, (_OFFSETOF_SC_REGS + SZREG * S3)(a0)
|
|
REG_S s4, (_OFFSETOF_SC_REGS + SZREG * S4)(a0)
|
|
REG_S s5, (_OFFSETOF_SC_REGS + SZREG * S5)(a0)
|
|
REG_S s6, (_OFFSETOF_SC_REGS + SZREG * S6)(a0)
|
|
REG_S s7, (_OFFSETOF_SC_REGS + SZREG * S7)(a0)
|
|
REG_S gp, (_OFFSETOF_SC_REGS + SZREG * GP)(a0)
|
|
REG_S sp, (_OFFSETOF_SC_REGS + SZREG * SP)(a0)
|
|
REG_S s8, (_OFFSETOF_SC_REGS + SZREG * S8)(a0)
|
|
li v0, 1 # be nice if we could tell
|
|
sw v0, (_OFFSETOF_SC_REGS + 34 * SZREG)(a0) # sc_fpused = 1
|
|
cfc1 v0, $31
|
|
swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0)
|
|
sw v0, ((32 * 4) + _OFFSETOF_SC_FPREGS)(a0)
|
|
REG_EPILOGUE
|
|
move v0, zero
|
|
j ra
|
|
END(setjmp)
|
|
|
|
LEAF(longjmp)
|
|
#ifdef __ABICALLS__
|
|
.set noreorder
|
|
.cpload t9
|
|
.set reorder
|
|
subu sp, sp, 32
|
|
.cprestore 16
|
|
#endif
|
|
REG_PROLOGUE
|
|
/* save return value in sc_regs[V0] */
|
|
REG_S a1, (_OFFSETOF_SC_REGS + V0 * SZREG)(a0)
|
|
REG_EPILOGUE
|
|
li v0, SYS_compat_13_sigreturn13
|
|
syscall
|
|
botch:
|
|
jal _C_LABEL(longjmperror)
|
|
jal _C_LABEL(abort)
|
|
END(longjmp)
|