mirror of
https://github.com/freebsd/freebsd-src
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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
119 lines
3.1 KiB
Groff
119 lines
3.1 KiB
Groff
.\" Copyright (c) 2006,2008 Joseph Koshy. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" This software is provided by Joseph Koshy ``as is'' and
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.\" any express or implied warranties, including, but not limited to, the
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.\" implied warranties of merchantability and fitness for a particular purpose
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.\" are disclaimed. in no event shall Joseph Koshy be liable
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.\" for any direct, indirect, incidental, special, exemplary, or consequential
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.\" damages (including, but not limited to, procurement of substitute goods
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.\" or services; loss of use, data, or profits; or business interruption)
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.\" however caused and on any theory of liability, whether in contract, strict
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.\" liability, or tort (including negligence or otherwise) arising in any way
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.\" out of the use of this software, even if advised of the possibility of
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.\" such damage.
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.\"
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.\" $Id: elf_rand.3 3639 2018-10-14 14:07:02Z jkoshy $
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.\"
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.Dd June 17, 2006
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.Dt ELF_RAND 3
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.Os
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.Sh NAME
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.Nm elf_rand
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.Nd provide sequential access to the next archive member
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.Sh LIBRARY
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.Lb libelf
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.Sh SYNOPSIS
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.In libelf.h
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.Ft off_t
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.Fn elf_rand "Elf *archive" "off_t offset"
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.Sh DESCRIPTION
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The
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.Fn elf_rand
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function causes the ELF descriptor
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.Ar archive
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to be adjusted so that the next call to
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.Xr elf_begin 3
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will provide access to the archive member at byte offset
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.Ar offset
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in the archive.
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Argument
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.Ar offset
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is the byte offset from the start of the archive to the beginning of
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the archive header for the desired member.
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.Pp
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Archive member offsets may be retrieved using the
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.Xr elf_getarsym 3
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function.
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.Sh RETURN VALUES
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Function
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.Fn elf_rand
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returns
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.Ar offset
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if successful or zero in case of an error.
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.Sh EXAMPLES
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To process all the members of an archive use:
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.Bd -literal -offset indent
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off_t off;
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Elf *archive, *e;
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\&...
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cmd = ELF_C_READ;
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archive = elf_begin(fd, cmd, NULL);
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while ((e = elf_begin(fd, cmd, archive)) != (Elf *) 0)
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{
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... process `e' here ...
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elf_end(e);
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off = ...new value...;
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if (elf_rand(archive, off) != off) {
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... process error ...
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}
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}
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elf_end(archive);
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.Ed
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.Pp
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To rewind an archive, use:
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.Bd -literal -offset indent
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Elf *archive;
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\&...
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if (elf_rand(archive, SARMAG) != SARMAG) {
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... error ...
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}
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.Ed
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.Sh ERRORS
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Function
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.Fn elf_rand
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may fail with the following errors:
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.Bl -tag -width "[ELF_E_RESOURCE]"
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.It Bq Er ELF_E_ARGUMENT
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Argument
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.Ar archive
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was null.
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.It Bq Er ELF_E_ARGUMENT
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Argument
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.Ar archive
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was not a descriptor for an
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.Xr ar 1
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archive.
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.It Bq Er ELF_E_ARCHIVE
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Argument
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.Ar offset
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did not correspond to the start of an archive member header.
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.El
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.Sh SEE ALSO
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.Xr ar 1 ,
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.Xr elf 3 ,
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.Xr elf_begin 3 ,
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.Xr elf_end 3 ,
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.Xr elf_getarsym 3 ,
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.Xr elf_next 3 ,
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.Xr gelf 3
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