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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/libc/arm/gen/sigsetjmp.S
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/*	$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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#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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END(sigsetjmp)

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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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END(siglongjmp)

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	.section .note.GNU-stack,"",%progbits

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