f44fbb4c13
This fixes a bug where a call to sigsetjmp followed by siglongjmp may fail when run on a machine with VFP enabled.
67 lines
2.5 KiB
ArmAsm
67 lines
2.5 KiB
ArmAsm
/* $NetBSD: sigsetjmp.S,v 1.6 2013/04/19 16:50:22 matt Exp $ */
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/*
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* Copyright (c) 1997 Mark Brinicombe
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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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* 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 Mark Brinicombe
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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 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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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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#include <machine/setjmp.h>
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/*
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* C library -- sigsetjmp, siglongjmp
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*
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* longjmp(a,v)
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* will generate a "return(v)" from the last call to
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* setjmp(a, m)
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* by restoring registers from the stack.
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* The previous signal state is restored.
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*/
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ENTRY(sigsetjmp)
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teq r1, #0
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beq PIC_SYM(_C_LABEL(_setjmp), PLT)
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b PIC_SYM(_C_LABEL(setjmp), PLT)
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.L_setjmp_magic:
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.word _JB_MAGIC__SETJMP
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WEAK_ALIAS(__siglongjmp, siglongjmp)
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ENTRY(siglongjmp)
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ldr r2, .L_setjmp_magic /* load magic */
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ldr r3, [r0] /* get magic from jmp_buf */
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bic r3, r3, #(_JB_MAGIC__SETJMP ^ _JB_MAGIC__SETJMP_VFP)
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/* ignore VFP-ness of magic */
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teq r2, r3 /* magic correct? */
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beq PIC_SYM(_C_LABEL(_longjmp), PLT)
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b PIC_SYM(_C_LABEL(longjmp), PLT)
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