70 lines
2.3 KiB
Groff
70 lines
2.3 KiB
Groff
.\" $NetBSD: setjmp.9,v 1.4 2008/04/30 13:10:58 martin Exp $
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.\"
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.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Gregory McGarry.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd May 23, 2002
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.Dt SETJMP 9
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.Os
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.Sh NAME
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.Nm setjmp ,
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.Nm longjmp
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.Nd non-local jumps
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.Sh SYNOPSIS
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.In machine/types.h
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.In sys/systm.h
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.Ft int
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.Fn setjmp "label_t *label"
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.Ft void
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.Fn longjmp "label_t *label"
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.Sh DESCRIPTION
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The
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.Fn setjmp
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function saves its calling environment in
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.Fa label .
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It returns zero on success.
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The
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.Fn longjmp
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function restores the environment saved by the most recent
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invocation of
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.Fn setjmp .
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It returns so that kernel execution continues as if
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the corresponding invocation of the
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.Fn setjmp
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had just returned.
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.Pp
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.Fn setjmp
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and
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.Fn longjmp
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are a machine-independent interface for machine-dependent
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implementations.
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.Pp
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These functions are primarily used by
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.Xr ddb 4 .
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.Sh SEE ALSO
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.Xr ddb 4
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