2003-04-16 17:34:34 +04:00
|
|
|
.\" $NetBSD: setjmp.9,v 1.3 2003/04/16 13:35:33 wiz Exp $
|
2002-05-25 06:16:35 +04:00
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
|
|
|
.\" by Gregory McGarry.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
|
|
|
.\" must display the following acknowledgement:
|
|
|
|
|
.\" This product includes software developed by the NetBSD
|
|
|
|
|
.\" Foundation, Inc. and its contributors.
|
|
|
|
|
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
|
|
|
.\" contributors may be used to endorse or promote products derived
|
|
|
|
|
.\" from this software without specific prior written permission.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
|
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
|
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
|
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
|
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
|
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
|
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
|
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
|
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.Dd May 23, 2002
|
|
|
|
|
.Dt SETJMP 9
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm setjmp ,
|
|
|
|
|
.Nm longjmp
|
|
|
|
|
.Nd non-local jumps
|
|
|
|
|
.Sh SYNOPSIS
|
2003-04-16 17:34:34 +04:00
|
|
|
.In machine/types.h
|
|
|
|
|
.In sys/systm.h
|
2002-05-25 06:16:35 +04:00
|
|
|
.Ft int
|
|
|
|
|
.Fn setjmp "label_t *label"
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn longjmp "label_t *label"
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Fn setjmp
|
|
|
|
|
function saves its calling environment in
|
|
|
|
|
.Fa label .
|
2002-10-14 17:43:14 +04:00
|
|
|
It returns zero on success.
|
|
|
|
|
The
|
2002-05-25 06:16:35 +04:00
|
|
|
.Fn longjmp
|
|
|
|
|
function restores the environment saved by the most recent
|
|
|
|
|
invocation of
|
|
|
|
|
.Fn setjmp .
|
|
|
|
|
It returns so that kernel execution continues as if
|
|
|
|
|
the corresponding invocation of the
|
|
|
|
|
.Fn setjmp
|
|
|
|
|
had just returned.
|
|
|
|
|
.Pp
|
|
|
|
|
.Fn setjmp
|
|
|
|
|
and
|
|
|
|
|
.Fn longjmp
|
|
|
|
|
are a machine-independent interface for machine-dependent
|
|
|
|
|
implementations.
|
|
|
|
|
.Pp
|
|
|
|
|
These functions are primarily used by
|
|
|
|
|
.Xr ddb 4 .
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr ddb 4
|
