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/*-
* 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 <sys/syscall.h>
#include <machine/asm.h>
#include <machine/regnum.h>
#if defined(LIBC_SCCS)
.text
.asciz "$OpenBSD: setjmp.S,v 1.6 1997/07/23 20:55:25 kstailey Exp $"
#endif /* LIBC_SCCS */
/*
* 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 (STAND_FRAME_SIZE + 12)
NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra)
.mask 0x80000000, (STAND_RA_OFFSET - STAND_FRAME_SIZE)
subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
#ifdef ABICALLS
.cprestore 16
#endif
.set reorder
sw ra, STAND_RA_OFFSET(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, STAND_FRAME_SIZE # pointer to struct sigaltstack
jal _C_LABEL(sigaltstack)
lw a0, SETJMP_FRAME_SIZE(sp) # restore jmpbuf
lw v1, STAND_FRAME_SIZE+8(sp) # get old ss_onstack
and v1, v1, 1 # extract onstack flag
sw v1, 0(a0) # save it in sc_onstack
lw ra, STAND_RA_OFFSET(sp)
addu sp, sp, SETJMP_FRAME_SIZE
blt v0, zero, botch # check for sigstack() error
sw ra, (2 * 4)(a0) # sc_pc = return address
li v0, 0xACEDBADE # sigcontext magic number
sw v0, ((ZERO + 3) * 4)(a0) # saved in sc_regs[0]
sw s0, ((S0 + 3) * 4)(a0)
sw s1, ((S1 + 3) * 4)(a0)
sw s2, ((S2 + 3) * 4)(a0)
sw s3, ((S3 + 3) * 4)(a0)
sw s4, ((S4 + 3) * 4)(a0)
sw s5, ((S5 + 3) * 4)(a0)
sw s6, ((S6 + 3) * 4)(a0)
sw s7, ((S7 + 3) * 4)(a0)
sw gp, ((GP + 3) * 4)(a0)
sw sp, ((SP + 3) * 4)(a0)
sw s8, ((S8 + 3) * 4)(a0)
li v0, 1 # be nice if we could tell
sw v0, (37 * 4)(a0) # sc_fpused = 1
cfc1 v0, $31
swc1 $f20, ((20 + 38) * 4)(a0)
swc1 $f21, ((21 + 38) * 4)(a0)
swc1 $f22, ((22 + 38) * 4)(a0)
swc1 $f23, ((23 + 38) * 4)(a0)
swc1 $f24, ((24 + 38) * 4)(a0)
swc1 $f25, ((25 + 38) * 4)(a0)
swc1 $f26, ((26 + 38) * 4)(a0)
swc1 $f27, ((27 + 38) * 4)(a0)
swc1 $f28, ((28 + 38) * 4)(a0)
swc1 $f29, ((29 + 38) * 4)(a0)
swc1 $f30, ((30 + 38) * 4)(a0)
swc1 $f31, ((31 + 38) * 4)(a0)
sw v0, ((32 + 38) * 4)(a0)
move v0, zero
j ra
END(setjmp)
LEAF(longjmp)
#ifdef ABICALLS
subu sp, sp, 32
.cprestore 16
#endif
.set reorder
sw a1, ((V0 + 3) * 4)(a0) # save return value in sc_regs[V0]
li v0, SYS_sigreturn
syscall
botch:
jal _C_LABEL(longjmperror)
jal _C_LABEL(abort)
END(longjmp)
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