142 lines
3.9 KiB
Groff
142 lines
3.9 KiB
Groff
.\" Copyright (c) 2006,2007 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd October 21, 2007
|
|
.Dt GELF_GETPHDR 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm elf32_getphdr ,
|
|
.Nm elf64_getphdr ,
|
|
.Nm gelf_getphdr
|
|
.Nd retrieve an ELF program header table
|
|
.Sh LIBRARY
|
|
.Lb libelf
|
|
.Sh SYNOPSIS
|
|
.In libelf.h
|
|
.Ft "Elf32_Phdr *"
|
|
.Fn elf32_getphdr "Elf *elf"
|
|
.Ft "Elf64_Phdr *"
|
|
.Fn elf64_getphdr "Elf *elf"
|
|
.In gelf.h
|
|
.Ft "GElf_Phdr *"
|
|
.Fn gelf_getphdr "Elf *elf" "int index" "GElf_Phdr *dst"
|
|
.Sh DESCRIPTION
|
|
These functions retrieve and translate ELF program header information
|
|
from an ELF descriptor, if this information exists.
|
|
.Pp
|
|
Functions
|
|
.Fn elf32_getphdr
|
|
and
|
|
.Fn elf64_getphdr
|
|
return a pointer to an array of translated
|
|
.Vt Elf32_Phdr
|
|
and
|
|
.Vt Elf64_Phdr
|
|
descriptors respectively.
|
|
These descriptors are described in
|
|
.Xr elf 5 .
|
|
The number of entries in this array may be determined using the
|
|
.Xr elf_getphnum 3
|
|
function.
|
|
.Pp
|
|
Function
|
|
.Fn gelf_getphdr
|
|
will retrieve the program header table entry at index
|
|
.Ar index
|
|
from ELF descriptor
|
|
.Ar elf .
|
|
The translated program header table entry will be written to the
|
|
address pointed to be argument
|
|
.Ar dst .
|
|
.Pp
|
|
Applications may inform the library of modifications to a program header table entry
|
|
by using the
|
|
.Xr elf_flagphdr 3
|
|
API.
|
|
Applications using the
|
|
.Xr gelf 3
|
|
interface need to use the
|
|
.Xr gelf_update_phdr 3
|
|
API to copy modifications to a program header entry back to the underlying
|
|
ELF descriptor.
|
|
.Sh RETURN VALUES
|
|
The functions a valid pointer if successful, or NULL in case an error
|
|
was encountered.
|
|
.Sh ERRORS
|
|
These functions may fail with the following errors:
|
|
.Bl -tag -width "[ELF_E_RESOURCE]"
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Argument
|
|
.Ar elf
|
|
was NULL.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Argument
|
|
.Ar elf
|
|
was not a descriptor for an ELF object.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Argument
|
|
.Ar dst
|
|
was NULL.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Index
|
|
.Ar index
|
|
was out of range.
|
|
.It Bq Er ELF_E_CLASS
|
|
The class of ELF descriptor
|
|
.Ar elf
|
|
did not match the expected class of the function being called.
|
|
.It Bq Er ELF_E_HEADER
|
|
ELF descriptor
|
|
.Ar elf
|
|
did not possess an executable header.
|
|
.It Bq Er ELF_E_HEADER
|
|
ELF descriptor
|
|
.Ar elf
|
|
had a corrupt executable header.
|
|
.It Bq Er ELF_E_RESOURCE
|
|
An out of memory condition was detected.
|
|
.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_VERSION
|
|
ELF descriptor
|
|
.Ar elf
|
|
was of an unsupported version.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr elf 3 ,
|
|
.Xr elf32_getehdr 3 ,
|
|
.Xr elf32_newphdr 3 ,
|
|
.Xr elf64_getehdr 3 ,
|
|
.Xr elf64_newphdr 3 ,
|
|
.Xr elf_flagphdr 3 ,
|
|
.Xr elf_getphnum 3 ,
|
|
.Xr gelf 3 ,
|
|
.Xr gelf_getehdr 3 ,
|
|
.Xr gelf_newphdr 3 ,
|
|
.Xr gelf_update_phdr 3 ,
|
|
.Xr elf 5
|