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
131 lines
3.6 KiB
Groff
131 lines
3.6 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_getarsym.3 3639 2018-10-14 14:07:02Z jkoshy $
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.\"
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.Dd August 15, 2006
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.Dt ELF_GETARSYM 3
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.Os
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.Sh NAME
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.Nm elf_getarsym
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.Nd retrieve the symbol table of an archive
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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 "Elf_Arsym *"
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.Fn elf_getarsym "Elf *elf" "size_t *ptr"
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.Sh DESCRIPTION
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The function
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.Fn elf_getarsym
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retrieves the symbol table for an
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.Xr ar 1
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archive, if one is available.
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.Pp
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Argument
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.Ar elf
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should be a descriptor for an
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.Xr ar 1
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archive opened using
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.Fn elf_begin
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or
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.Fn elf_memory .
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.Pp
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If the archive
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.Ar elf
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contains a symbol table with n entries, this function returns a
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pointer to an array of n+1
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.Vt Elf_Arsym
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structures.
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An
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.Vt Elf_Arsym
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structure has the following elements:
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.Bl -tag -width indent -compact
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.It Vt "char *" Va as_name
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This structure member is a pointer to a null-terminated symbol name.
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.It Vt "off_t" Va as_off
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This structure member contains the byte offset from the beginning of the archive to
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the header for the archive member.
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This value is suitable for use with
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.Xr elf_rand 3 .
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.It Vt "unsigned long" Va as_hash
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This structure member contains a portable hash value for the symbol
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name, as computed by
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.Xr elf_hash 3 .
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.El
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.Pp
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The last entry of the returned array will have a NULL value for member
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.Va as_name ,
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a zero value for member
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.Va as_off
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and an illegal value of ~0UL for
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.Va as_hash .
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.Pp
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If argument
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.Ar ptr
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is non-null, the
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.Fn elf_getarsym
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function will store the number of table entries returned (including the
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sentinel entry at the end) into the location it points to.
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.Sh RETURN VALUES
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Function
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.Fn elf_getarsym
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returns a pointer to an array of
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.Vt Elf_Arsym
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structures if successful, or a NULL
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pointer if an error was encountered.
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.Pp
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If argument
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.Ar ptr
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is non-null and there was no error, the library will store the
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number of archive symbol entries returned into the location it
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points to.
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If argument
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.Ar ptr
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is non-null and an error was encountered, the library will
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set the location pointed to by it to zero.
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.Sh ERRORS
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Function
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.Fn elf_getarsym
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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 elf
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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 elf
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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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.El
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.Sh SEE ALSO
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.Xr elf 3 ,
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.Xr elf_begin 3 ,
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.Xr elf_getarhdr 3 ,
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.Xr elf_hash 3 ,
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.Xr elf_memory 3 ,
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.Xr elf_next 3 ,
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.Xr elf_rand 3
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