freebsd-dev/lib/libc/mips/gen/_setjmp.S
Warner Losh d7ee48f115 Bring in initial libc support for mips. These files were taken from
the OpenBSD tree and should be considered preliminary.  They are here
to facilitate building of the tree.
1999-03-03 07:06:17 +00:00

133 lines
4.2 KiB
ArmAsm

/*-
* 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/regnum.h>
#include <machine/asm.h>
#if defined(LIBC_SCCS)
.text
.asciz "$OpenBSD: _setjmp.S,v 1.5 1996/08/19 08:15:51 tholo 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,
* The previous signal state is NOT restored.
*/
LEAF(_setjmp)
.set noreorder
li v0, 0xACEDBADE # sigcontext magic number
sw ra, (2 * 4)(a0) # sc_pc = return address
sw v0, (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 sp, ((SP + 3) * 4)(a0)
sw s8, ((S8 + 3) * 4)(a0)
cfc1 v0, $31 # too bad cant check if FP used
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)
j ra
move v0, zero
END(_setjmp)
LEAF(_longjmp)
#ifdef ABICALLS
subu sp, sp, 32
.cprestore 16
#endif
.set noreorder
lw v0, (3 * 4)(a0) # get magic number
lw ra, (2 * 4)(a0)
bne v0, 0xACEDBADE, botch # jump if error
addu sp, sp, 32 # does not matter, sanity
lw s0, ((S0 + 3) * 4)(a0)
lw s1, ((S1 + 3) * 4)(a0)
lw s2, ((S2 + 3) * 4)(a0)
lw s3, ((S3 + 3) * 4)(a0)
lw s4, ((S4 + 3) * 4)(a0)
lw s5, ((S5 + 3) * 4)(a0)
lw s6, ((S6 + 3) * 4)(a0)
lw s7, ((S7 + 3) * 4)(a0)
lw v0, ((32 + 38) * 4)(a0) # get fpu status
lw sp, ((SP + 3) * 4)(a0)
lw s8, ((S8 + 3) * 4)(a0)
ctc1 v0, $31
lwc1 $f20, ((20 + 38) * 4)(a0)
lwc1 $f21, ((21 + 38) * 4)(a0)
lwc1 $f22, ((22 + 38) * 4)(a0)
lwc1 $f23, ((23 + 38) * 4)(a0)
lwc1 $f24, ((24 + 38) * 4)(a0)
lwc1 $f25, ((25 + 38) * 4)(a0)
lwc1 $f26, ((26 + 38) * 4)(a0)
lwc1 $f27, ((27 + 38) * 4)(a0)
lwc1 $f28, ((28 + 38) * 4)(a0)
lwc1 $f29, ((29 + 38) * 4)(a0)
lwc1 $f30, ((30 + 38) * 4)(a0)
lwc1 $f31, ((31 + 38) * 4)(a0)
j ra
move v0, a1
botch:
jal _C_LABEL(longjmperror)
nop
jal _C_LABEL(abort)
nop
END(_longjmp)