124 lines
3.4 KiB
Groff
124 lines
3.4 KiB
Groff
.\" Copyright (c) 2006,2008 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.
|
|
.\"
|
|
.\" $Id$
|
|
.\"
|
|
.Dd December 16, 2006
|
|
.Os
|
|
.Dt GELF_GETEHDR 3
|
|
.Sh NAME
|
|
.Nm elf32_getehdr ,
|
|
.Nm elf64_getehdr ,
|
|
.Nm gelf_getehdr
|
|
.Nd retrieve the object file header
|
|
.Sh LIBRARY
|
|
.Lb libelf
|
|
.Sh SYNOPSIS
|
|
.In libelf.h
|
|
.Ft "Elf32_Ehdr *"
|
|
.Fn elf32_getehdr "Elf *elf"
|
|
.Ft "Elf64_Ehdr *"
|
|
.Fn elf64_getehdr "Elf *elf"
|
|
.In gelf.h
|
|
.Ft "GElf_Ehdr *"
|
|
.Fn gelf_getehdr "Elf *elf" "GElf_Ehdr *dst"
|
|
.Sh DESCRIPTION
|
|
These functions retrieve the ELF object file
|
|
header from the ELF descriptor
|
|
.Ar elf
|
|
and return a translated header descriptor to their callers.
|
|
.Pp
|
|
Functions
|
|
.Fn elf32_getehdr
|
|
and
|
|
.Fn elf64_getehdr
|
|
return a pointer to the appropriate class-specific header descriptor
|
|
if it exists in the file referenced by descriptor
|
|
.Ar elf .
|
|
These functions return
|
|
.Dv NULL
|
|
if an ELF header was not found in file
|
|
.Ar elf .
|
|
.Pp
|
|
Function
|
|
.Fn gelf_getehdr
|
|
stores a translated copy of the header for ELF file
|
|
.Ar elf
|
|
into the descriptor pointed to by argument
|
|
.Ar dst .
|
|
It returns argument
|
|
.Ar dst
|
|
if successful or
|
|
.Dv NULL
|
|
in case of failure.
|
|
.Sh RETURN VALUES
|
|
These functions return a pointer to a translated header descriptor
|
|
if successful, or NULL on failure.
|
|
.Sh ERRORS
|
|
These functions can fail with the following errors:
|
|
.Bl -tag -width "[ELF_E_RESOURCE]"
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
The argument
|
|
.Ar elf
|
|
was null.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Argument
|
|
.Ar elf
|
|
was not a descriptor for an ELF file.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
The elf class of descriptor
|
|
.Ar elf
|
|
was not recognized.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Argument
|
|
.Ar dst
|
|
was null.
|
|
.It Bq Er ELF_E_CLASS
|
|
The ELF class of descriptor
|
|
.Ar elf
|
|
did not match that of the API function being called.
|
|
.It Bq Er ELF_E_HEADER
|
|
ELF descriptor
|
|
.Ar elf
|
|
does not have an associated header.
|
|
.It Bq Er ELF_E_RESOURCE
|
|
An out of memory condition was detected during execution.
|
|
.It Bq Er ELF_E_SECTION
|
|
The ELF descriptor in argument
|
|
.Ar elf
|
|
did not adhere to the conventions used for extended numbering.
|
|
.It Bq Er ELF_E_VERSION
|
|
The ELF descriptor
|
|
.Ar elf
|
|
had an unsupported ELF version number.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr elf 3 ,
|
|
.Xr elf32_newehdr 3 ,
|
|
.Xr elf64_newehdr 3 ,
|
|
.Xr elf_flagehdr 3 ,
|
|
.Xr elf_getident 3 ,
|
|
.Xr gelf 3 ,
|
|
.Xr gelf_newehdr 3 ,
|
|
.Xr elf 5
|