1ee3532451
This should also save and restore non-volatile Altivec registers, but that needs to wait on solving two problems: 1. Adding the nonvolatile vector registers means we need 5 more than _JBLEN entries in jmp_buf on 32-bit targets (64-bit is OK). 2. Need to figure out how to determine if saving/restoring vector regs is supported on the current CPU from userland. MFC after: 1 month
184 lines
4.7 KiB
ArmAsm
184 lines
4.7 KiB
ArmAsm
/*-
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* Copyright (c) 2002 Peter Grehan.
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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/* $NetBSD: sigsetjmp.S,v 1.4 1998/10/03 12:30:38 tsubai Exp $ */
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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/*
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* C library -- sigsetjmp, siglongjmp
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*
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* siglongjmp(a,v)
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* will generate a "return(v?v:1)" from the last call to
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* sigsetjmp(a, savemask)
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* by restoring registers from the stack.
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* The previous signal state is restored if savemask is non-zero
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*
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* jmpbuf layout:
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* +------------+
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* | savemask |
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* +------------+
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* | sig state |
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* | |
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* | (4 words) |
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* | |
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* +------------+
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* | saved regs |
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* | ... |
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*/
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#include <sys/syscall.h>
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ENTRY(sigsetjmp)
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mr %r6,%r3
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stw %r4,0(%r3)
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or. %r7,%r4,%r4
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beq 1f
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li %r3,1 /* SIG_BLOCK, but doesn't matter */
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/* since set == NULL */
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li %r4,0 /* set = NULL */
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mr %r5,%r6 /* &oset */
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addi %r5,%r5,4
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li %r0, SYS_sigprocmask /* sigprocmask(SIG_BLOCK, NULL, &oset)*/
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sc /* assume no error XXX */
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1:
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mflr %r11
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mfcr %r12
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mr %r10,%r1
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mr %r9,%r2
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std %r9,40 + 0*8(%r6)
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stfd %f14,40 + 23*8(%r6)
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std %r10,40 + 1*8(%r6)
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stfd %f15,40 + 24*8(%r6)
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std %r11,40 + 2*8(%r6)
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stfd %f16,40 + 25*8(%r6)
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std %r12,40 + 3*8(%r6)
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stfd %f17,40 + 26*8(%r6)
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std %r13,40 + 4*8(%r6)
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stfd %f18,40 + 27*8(%r6)
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std %r14,40 + 5*8(%r6)
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stfd %f19,40 + 28*8(%r6)
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std %r15,40 + 6*8(%r6)
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stfd %f20,40 + 29*8(%r6)
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std %r16,40 + 7*8(%r6)
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stfd %f21,40 + 30*8(%r6)
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std %r17,40 + 8*8(%r6)
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stfd %f22,40 + 31*8(%r6)
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std %r18,40 + 9*8(%r6)
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stfd %f23,40 + 32*8(%r6)
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std %r19,40 + 10*8(%r6)
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stfd %f24,40 + 33*8(%r6)
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std %r20,40 + 11*8(%r6)
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stfd %f25,40 + 34*8(%r6)
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std %r21,40 + 12*8(%r6)
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stfd %f26,40 + 35*8(%r6)
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std %r22,40 + 13*8(%r6)
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stfd %f27,40 + 36*8(%r6)
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std %r23,40 + 14*8(%r6)
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stfd %f28,40 + 37*8(%r6)
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std %r24,40 + 15*8(%r6)
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stfd %f29,40 + 38*8(%r6)
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std %r25,40 + 16*8(%r6)
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stfd %f30,40 + 39*8(%r6)
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std %r26,40 + 17*8(%r6)
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stfd %f31,40 + 40*8(%r6)
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std %r27,40 + 18*8(%r6)
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std %r28,40 + 19*8(%r6)
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std %r29,40 + 20*8(%r6)
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std %r30,40 + 21*8(%r6)
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std %r31,40 + 22*8(%r6)
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li %r3,0
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blr
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END(sigsetjmp)
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ENTRY(siglongjmp)
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ld %r9,40 + 0*8(%r3)
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lfd %f14,40 + 23*8(%r3)
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ld %r10,40 + 1*8(%r3)
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lfd %f15,40 + 24*8(%r3)
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ld %r11,40 + 2*8(%r3)
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lfd %f16,40 + 25*8(%r3)
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ld %r12,40 + 3*8(%r3)
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lfd %f17,40 + 26*8(%r3)
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ld %r14,40 + 5*8(%r3)
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lfd %f18,40 + 27*8(%r3)
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ld %r15,40 + 6*8(%r3)
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lfd %f19,40 + 28*8(%r3)
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ld %r16,40 + 7*8(%r3)
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lfd %f20,40 + 29*8(%r3)
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ld %r17,40 + 8*8(%r3)
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lfd %f21,40 + 30*8(%r3)
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ld %r18,40 + 9*8(%r3)
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lfd %f22,40 + 31*8(%r3)
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ld %r19,40 + 10*8(%r3)
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lfd %f23,40 + 32*8(%r3)
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ld %r20,40 + 11*8(%r3)
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lfd %f24,40 + 33*8(%r3)
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ld %r21,40 + 12*8(%r3)
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lfd %f25,40 + 34*8(%r3)
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ld %r22,40 + 13*8(%r3)
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lfd %f26,40 + 35*8(%r3)
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ld %r23,40 + 14*8(%r3)
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lfd %f27,40 + 36*8(%r3)
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ld %r24,40 + 15*8(%r3)
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lfd %f28,40 + 37*8(%r3)
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ld %r25,40 + 16*8(%r3)
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lfd %f29,40 + 38*8(%r3)
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ld %r26,40 + 17*8(%r3)
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lfd %f30,40 + 39*8(%r3)
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ld %r27,40 + 18*8(%r3)
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lfd %f31,40 + 40*8(%r3)
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ld %r28,40 + 19*8(%r3)
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ld %r29,40 + 20*8(%r3)
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ld %r30,40 + 21*8(%r3)
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ld %r31,40 + 22*8(%r3)
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lwz %r7,0(%r3)
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mr %r6,%r4
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mtlr %r11
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mtcr %r12
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mr %r2,%r9
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mr %r1,%r10
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or. %r7,%r7,%r7
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beq 1f
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mr %r4,%r3
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li %r3,3 /* SIG_SETMASK */
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addi %r4,%r4,4 /* &set */
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li %r5,0 /* oset = NULL */
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li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */
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sc /* assume no error XXX */
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1:
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or. %r3,%r6,%r6
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bnelr
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li %r3,1
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blr
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END(siglongjmp)
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.section .note.GNU-stack,"",%progbits
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