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.\" ========================================================================
.\"
.IX Title "ELFEDIT 1"
.TH ELFEDIT 1 1980-01-01 binutils-2.40.90 "GNU Development Tools"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH NAME
elfedit \- update ELF header and program property of ELF files
.SH SYNOPSIS
.IX Header "SYNOPSIS"
elfedit [\fB\-\-input\-mach=\fR\fImachine\fR]
        [\fB\-\-input\-type=\fR\fItype\fR]
        [\fB\-\-input\-osabi=\fR\fIosabi\fR]
        [\fB\-\-input\-abiversion=\fR\fIversion\fR]
        \fB\-\-output\-mach=\fR\fImachine\fR
        \fB\-\-output\-type=\fR\fItype\fR
        \fB\-\-output\-osabi=\fR\fIosabi\fR
        \fB\-\-output\-abiversion=\fR\fIversion\fR
        \fB\-\-enable\-x86\-feature=\fR\fIfeature\fR
        \fB\-\-disable\-x86\-feature=\fR\fIfeature\fR
        [\fB\-v\fR|\fB\-\-version\fR]
        [\fB\-h\fR|\fB\-\-help\fR]
        \fIelffile\fR...
.SH DESCRIPTION
.IX Header "DESCRIPTION"
\&\fBelfedit\fR updates the ELF header and program property of ELF
files which have the matching ELF machine and file types.  The options
control how and which fields in the ELF header and program property
should be updated.
.PP
\&\fIelffile\fR... are the ELF files to be updated.  32\-bit and
64\-bit ELF files are supported, as are archives containing ELF files.
.SH OPTIONS
.IX Header "OPTIONS"
The long and short forms of options, shown here as alternatives, are
equivalent. At least one of the \fB\-\-output\-mach\fR,
\&\fB\-\-output\-type\fR, \fB\-\-output\-osabi\fR,
\&\fB\-\-output\-abiversion\fR,
\&\fB\-\-enable\-x86\-feature\fR and \fB\-\-disable\-x86\-feature\fR
options must be given.
.IP \fB\-\-input\-mach=\fR\fImachine\fR 4
.IX Item "--input-mach=machine"
Set the matching input ELF machine type to \fImachine\fR.  If
\&\fB\-\-input\-mach\fR isn't specified, it will match any ELF
machine types.
.Sp
The supported ELF machine types are, \fIi386\fR, \fIIAMCU\fR, \fIL1OM\fR,
\&\fIK1OM\fR and \fIx86\-64\fR.
.IP \fB\-\-output\-mach=\fR\fImachine\fR 4
.IX Item "--output-mach=machine"
Change the ELF machine type in the ELF header to \fImachine\fR.  The
supported ELF machine types are the same as \fB\-\-input\-mach\fR.
.IP \fB\-\-input\-type=\fR\fItype\fR 4
.IX Item "--input-type=type"
Set the matching input ELF file type to \fItype\fR.  If
\&\fB\-\-input\-type\fR isn't specified, it will match any ELF file types.
.Sp
The supported ELF file types are, \fIrel\fR, \fIexec\fR and \fIdyn\fR.
.IP \fB\-\-output\-type=\fR\fItype\fR 4
.IX Item "--output-type=type"
Change the ELF file type in the ELF header to \fItype\fR.  The
supported ELF types are the same as \fB\-\-input\-type\fR.
.IP \fB\-\-input\-osabi=\fR\fIosabi\fR 4
.IX Item "--input-osabi=osabi"
Set the matching input ELF file OSABI to \fIosabi\fR.  If
\&\fB\-\-input\-osabi\fR isn't specified, it will match any ELF OSABIs.
.Sp
The supported ELF OSABIs are, \fInone\fR, \fIHPUX\fR, \fINetBSD\fR,
\&\fIGNU\fR, \fILinux\fR (alias for \fIGNU\fR),
\&\fISolaris\fR, \fIAIX\fR, \fIIrix\fR,
\&\fIFreeBSD\fR, \fITRU64\fR, \fIModesto\fR, \fIOpenBSD\fR, \fIOpenVMS\fR,
\&\fINSK\fR, \fIAROS\fR and \fIFenixOS\fR.
.IP \fB\-\-output\-osabi=\fR\fIosabi\fR 4
.IX Item "--output-osabi=osabi"
Change the ELF OSABI in the ELF header to \fIosabi\fR.  The
supported ELF OSABI are the same as \fB\-\-input\-osabi\fR.
.IP \fB\-\-input\-abiversion=\fR\fIversion\fR 4
.IX Item "--input-abiversion=version"
Set the matching input ELF file ABIVERSION to \fIversion\fR.
\&\fIversion\fR must be between 0 and 255.  If \fB\-\-input\-abiversion\fR
isn't specified, it will match any ELF ABIVERSIONs.
.IP \fB\-\-output\-abiversion=\fR\fIversion\fR 4
.IX Item "--output-abiversion=version"
Change the ELF ABIVERSION in the ELF header to \fIversion\fR.
\&\fIversion\fR must be between 0 and 255.
.IP \fB\-\-enable\-x86\-feature=\fR\fIfeature\fR 4
.IX Item "--enable-x86-feature=feature"
Set the \fIfeature\fR bit in program property in \fIexec\fR or \fIdyn\fR
ELF files with machine types of \fIi386\fR or \fIx86\-64\fR.  The
supported features are, \fIibt\fR, \fIshstk\fR, \fIlam_u48\fR and
\&\fIlam_u57\fR.
.IP \fB\-\-disable\-x86\-feature=\fR\fIfeature\fR 4
.IX Item "--disable-x86-feature=feature"
Clear the \fIfeature\fR bit in program property in \fIexec\fR or
\&\fIdyn\fR ELF files with machine types of \fIi386\fR or \fIx86\-64\fR.
The supported features are the same as \fB\-\-enable\-x86\-feature\fR.
.Sp
Note: \fB\-\-enable\-x86\-feature\fR and \fB\-\-disable\-x86\-feature\fR
are available only on hosts with \fBmmap\fR support.
.IP \fB\-v\fR 4
.IX Item "-v"
.PD 0
.IP \fB\-\-version\fR 4
.IX Item "--version"
.PD
Display the version number of \fBelfedit\fR.
.IP \fB\-h\fR 4
.IX Item "-h"
.PD 0
.IP \fB\-\-help\fR 4
.IX Item "--help"
.PD
Display the command-line options understood by \fBelfedit\fR.
.IP \fB@\fR\fIfile\fR 4
.IX Item "@file"
Read command-line options from \fIfile\fR.  The options read are
inserted in place of the original @\fIfile\fR option.  If \fIfile\fR
does not exist, or cannot be read, then the option will be treated
literally, and not removed.
.Sp
Options in \fIfile\fR are separated by whitespace.  A whitespace
character may be included in an option by surrounding the entire
option in either single or double quotes.  Any character (including a
backslash) may be included by prefixing the character to be included
with a backslash.  The \fIfile\fR may itself contain additional
@\fIfile\fR options; any such options will be processed recursively.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBreadelf\fR\|(1), and the Info entries for \fIbinutils\fR.
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright (c) 1991\-2023 Free Software Foundation, Inc.
.PP
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, with no Front-Cover Texts, and with no
Back-Cover Texts.  A copy of the license is included in the
section entitled "GNU Free Documentation License".