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.\" Copyright (c) 2009 Joseph Koshy. All rights reserved.
.\"
.\" 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.
.\"
.\" This software is provided by Joseph Koshy ``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 Joseph Koshy 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.
.\"
.\" $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
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