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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/libc/i386/gen/sigsetjmp.S
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/*-

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 * Copyright (c) 1990 The Regents of the University of California.

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 * 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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 * William Jolitz.

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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. 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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#if defined(LIBC_SCCS) && !defined(lint)

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	.text

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	.asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $"

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#endif /* LIBC_SCCS and not lint */

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#include <machine/asm.h>

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#include "SYS.h"

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/*-

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 * TODO:

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 *	Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp,

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 *	remove the other *jmp functions and define everything in terms

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 *	of the renamed functions.  This requires compiler support for

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 *	the renamed functions (introduced in gcc-2.5.3; previous versions

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 *	only supported *jmp with 0 or 1 leading underscores).

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 *

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 *	Restore _all_ the registers and the signal mask atomically.  Can

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 *	use sigreturn() if sigreturn() works.

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 */

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ENTRY(sigsetjmp)

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	movl	8(%esp),%eax

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	movl	4(%esp),%ecx

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	movl	%eax,44(%ecx)

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	testl	%eax,%eax

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	jz	2f

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	leal	28(%ecx), %eax

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	pushl	%eax			/* (sigset_t*)oset */

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	pushl	$0			/* (sigset_t*)set  */

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	pushl	$1			/* SIG_BLOCK       */

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	call	__libc_sigprocmask

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	addl	$12,%esp

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	movl	4(%esp),%ecx

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2:	movl	0(%esp),%edx

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	movl	%edx, 0(%ecx)

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	movl	%ebx, 4(%ecx)

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	movl	%esp, 8(%ecx)

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	movl	%ebp,12(%ecx)

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	movl	%esi,16(%ecx)

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	movl	%edi,20(%ecx)

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	fnstcw	24(%ecx)

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	xorl	%eax,%eax

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	ret

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END(sigsetjmp)

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	WEAK_REFERENCE(__siglongjmp, siglongjmp)

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ENTRY(__siglongjmp)

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	movl	4(%esp),%edx

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	cmpl	$0,44(%edx)

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	jz	2f

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	pushl	$0			/* (sigset_t*)oset */

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	leal	28(%edx), %eax

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	pushl	%eax			/* (sigset_t*)set  */

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	pushl	$3			/* SIG_SETMASK     */

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	call	__libc_sigprocmask

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	addl	$12,%esp

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	movl	4(%esp),%edx

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2:	movl	8(%esp),%eax

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	movl	0(%edx),%ecx

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	movl	4(%edx),%ebx

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	movl	8(%edx),%esp

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	movl	12(%edx),%ebp

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	movl	16(%edx),%esi

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	movl	20(%edx),%edi

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	fldcw	24(%edx)

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	testl	%eax,%eax

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	jnz	1f

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	incl	%eax

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1:	movl	%ecx,0(%esp)

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	ret

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END(__siglongjmp)

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

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