120 lines
4.3 KiB
ArmAsm
120 lines
4.3 KiB
ArmAsm
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/syscall.h>
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#include <machine/regnum.h>
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#include <machine/machAsmDefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
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ASMSTR("$Id: setjmp.S,v 1.4 1995/12/22 10:20:59 jonathan Exp $")
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#endif /* LIBC_SCCS and not lint */
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/*
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* C library -- setjmp, longjmp
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*
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* longjmp(a,v)
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* will generate a "return(v)" from
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* the last call to
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* setjmp(a)
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* by restoring registers from the stack,
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* and a struct sigcontext, see <signal.h>
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*/
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#define SETJMP_FRAME_SIZE (STAND_FRAME_SIZE + 12)
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NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra)
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subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
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.mask 0x80000000, (STAND_RA_OFFSET - STAND_FRAME_SIZE)
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sw ra, STAND_RA_OFFSET(sp) # save state
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sw a0, SETJMP_FRAME_SIZE(sp)
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move a0, zero # get current signal mask
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jal _C_LABEL(sigblock)
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lw v1, SETJMP_FRAME_SIZE(sp) # v1 = jmpbuf
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sw v0, (1 * 4)(v1) # save sc_mask = sigblock(0)
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move a0, zero
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addu a1, sp, STAND_FRAME_SIZE # pointer to struct sigaltstack
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jal _C_LABEL(sigaltstack)
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lw a0, SETJMP_FRAME_SIZE(sp) # restore jmpbuf
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lw v1, STAND_FRAME_SIZE+8(sp) # get old ss_onstack
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and v1, v1, 1 # extract onstack flag
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sw v1, 0(a0) # save it in sc_onstack
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lw ra, STAND_RA_OFFSET(sp)
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addu sp, sp, SETJMP_FRAME_SIZE
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blt v0, zero, botch # check for sigstack() error
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sw ra, (2 * 4)(a0) # sc_pc = return address
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li v0, 0xACEDBADE # sigcontext magic number
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sw v0, ((ZERO + 3) * 4)(a0) # saved in sc_regs[0]
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sw s0, ((S0 + 3) * 4)(a0)
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sw s1, ((S1 + 3) * 4)(a0)
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sw s2, ((S2 + 3) * 4)(a0)
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sw s3, ((S3 + 3) * 4)(a0)
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sw s4, ((S4 + 3) * 4)(a0)
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sw s5, ((S5 + 3) * 4)(a0)
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sw s6, ((S6 + 3) * 4)(a0)
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sw s7, ((S7 + 3) * 4)(a0)
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sw gp, ((GP + 3) * 4)(a0)
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sw sp, ((SP + 3) * 4)(a0)
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sw s8, ((S8 + 3) * 4)(a0)
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li v0, 1 # be nice if we could tell
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sw v0, (37 * 4)(a0) # sc_fpused = 1
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cfc1 v0, $31
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swc1 $f20, ((20 + 38) * 4)(a0)
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swc1 $f21, ((21 + 38) * 4)(a0)
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swc1 $f22, ((22 + 38) * 4)(a0)
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swc1 $f23, ((23 + 38) * 4)(a0)
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swc1 $f24, ((24 + 38) * 4)(a0)
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swc1 $f25, ((25 + 38) * 4)(a0)
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swc1 $f26, ((26 + 38) * 4)(a0)
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swc1 $f27, ((27 + 38) * 4)(a0)
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swc1 $f28, ((28 + 38) * 4)(a0)
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swc1 $f29, ((29 + 38) * 4)(a0)
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swc1 $f30, ((30 + 38) * 4)(a0)
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swc1 $f31, ((31 + 38) * 4)(a0)
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sw v0, ((32 + 38) * 4)(a0)
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move v0, zero
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j ra
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END(setjmp)
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LEAF(longjmp)
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sw a1, ((V0 + 3) * 4)(a0) # save return value in sc_regs[V0]
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li v0, SYS_sigreturn
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syscall
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botch:
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jal _C_LABEL(longjmperror)
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jal _C_LABEL(abort)
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END(longjmp)
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