.\"	$NetBSD: dwarf_get_elf.3,v 1.3 2016/02/20 02:43:41 christos Exp $
.\"
.\" Copyright (c) 2009 Joseph Koshy.  All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" This software is provided by Joseph Koshy ``as is'' and
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.\" Id: dwarf_get_elf.3 2122 2011-11-09 15:35:14Z jkoshy 
.\"
.Dd November 9, 2011
.Os
.Dt DWARF_GET_ELF 3
.Sh NAME
.Nm dwarf_get_elf
.Nd retrieve the
.Vt Elf
descriptor associated with a
.Vt Dwarf_Debug
instance
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fo dwarf_get_elf
.Fa "Dwarf_Debug dbg"
.Fa "Elf **elf"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_get_elf
returns the
.Vt Elf
descriptor associated with a
.Vt Dwarf_Debug
instance.
.Pp
Argument
.Ar dbg
should be a handle to a valid
.Vt Dwarf_Debug
instance returned by a prior call to
.Xr dwarf_init 3
or
.Xr dwarf_elf_init 3 .
.Pp
Argument
.Ar elf
points a location into which a handle to an
.Vt Elf
descriptor will be written.
.Pp
Argument
.Ar err
is used to record error information in case of failure.
.Sh RETURN VALUES
On success, function
.Fn dwarf_get_elf
returns
.Dv DW_DLV_OK .
In case of an error, it returns
.Dv DW_DLV_ERROR
and sets argument
.Ar err .
.Sh EXAMPLES
To retrieve the
.Vt Elf
instance associated with a
.Vt Dwarf_Debug
instance use:
.Bd -literal -offset indent
Dwarf_Debug dbg;
Dwarf_Error de;
Elf *elf;

\&... allocate dbg using dwarf_init() etc ...

if (dwarf_get_elf(dbg, &elf, &de) != DW_DLV_OK)
	errx(EXIT_FAILURE, "dwarf_get_elf: %s", dwarf_errmsg(de));
.Ed
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_errmsg 3 ,
.Xr dwarf_init 3 ,
.Xr dwarf_finish 3 ,
.Xr elf 3