ae500c1ff8
Highlights: - Make sure that only TLS sections are sorted into TLS segment. - Fixed multiple errors in "Section to Segment mapping". - Man page updates - ar improvements - elfcopy: avoid filter_reloc uninitialized variable for rela - elfcopy: avoid stripping relocations from static binaries - readelf: avoid printing directory in front of absolute path - readelf: add NT_FREEBSD_FEATURE_CTL FreeBSD note type - test improvements NOTES: Some of these changes originated in FreeBSD and simply reduce diffs between contrib and vendor. ELF Tool Chain ar is not (currently) used in FreeBSD, and there are improvements in both FreeBSD and ELF Tool Chain ar that are not in the other. Sponsored by: The FreeBSD Foundation
116 lines
3.3 KiB
Groff
116 lines
3.3 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: gelf_checksum.3 3639 2018-10-14 14:07:02Z jkoshy $
|
|
.\"
|
|
.Dd August 29, 2006
|
|
.Dt GELF_CHECKSUM 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm elf32_checksum ,
|
|
.Nm elf64_checksum ,
|
|
.Nm gelf_checksum
|
|
.Nd return the checksum of an ELF object
|
|
.Sh LIBRARY
|
|
.Lb libelf
|
|
.Sh SYNOPSIS
|
|
.In libelf.h
|
|
.Ft long
|
|
.Fn elf32_checksum "Elf *elf"
|
|
.Ft long
|
|
.Fn elf64_checksum "Elf *elf"
|
|
.In gelf.h
|
|
.Ft long
|
|
.Fn gelf_checksum "Elf *elf"
|
|
.Sh DESCRIPTION
|
|
These functions return a simple checksum of the ELF object described
|
|
by their argument
|
|
.Ar elf .
|
|
The checksum is computed in way that allows its value to remain
|
|
unchanged in presence of modifications to the ELF object by utilities
|
|
like
|
|
.Xr strip 1 .
|
|
.Pp
|
|
Function
|
|
.Fn elf32_checksum
|
|
returns a checksum for an ELF descriptor
|
|
.Ar elf
|
|
of class
|
|
.Dv ELFCLASS32 .
|
|
.Pp
|
|
Function
|
|
.Fn elf64_checksum
|
|
returns a checksum for an ELF descriptor
|
|
.Ar elf
|
|
of class
|
|
.Dv ELFCLASS64 .
|
|
.Pp
|
|
Function
|
|
.Fn gelf_checksum
|
|
provides a class-independent way retrieving the checksum
|
|
for ELF object
|
|
.Ar elf .
|
|
.Sh RETURN VALUES
|
|
These functions return the checksum of the ELF object, or zero 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 file.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
The ELF descriptor
|
|
.Ar elf
|
|
was not opened for reading or updating.
|
|
.It Bq Er ELF_E_CLASS
|
|
For functions
|
|
.Fn elf32_checksum
|
|
and
|
|
.Fn elf64_checksum ,
|
|
ELF descriptor
|
|
.Ar elf
|
|
did not match the class of the called function.
|
|
.It Bq Er ELF_E_HEADER
|
|
The ELF object specified by argument
|
|
.Ar elf
|
|
had a malformed executable header.
|
|
.It Bq Er ELF_E_RESOURCE
|
|
An out of memory condition was detected during processing.
|
|
.It Bq Er ELF_E_SECTION
|
|
The ELF object specified by argument
|
|
.Ar elf
|
|
contained a section with a malformed section header.
|
|
.It Bq Er ELF_E_VERSION
|
|
The ELF object was of an unsupported version.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr strip 1 ,
|
|
.Xr elf 3 ,
|
|
.Xr gelf 3
|