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
122 lines
3.4 KiB
Groff
122 lines
3.4 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: gelf_getcap.3 3639 2018-10-14 14:07:02Z jkoshy $
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.\"
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.Dd August 29, 2006
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.Dt GELF_GETCAP 3
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.Os
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.Sh NAME
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.Nm gelf_getcap ,
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.Nm gelf_update_cap
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.Nd read and update ELF capability information
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.Sh LIBRARY
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.Lb libelf
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.Sh SYNOPSIS
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.In gelf.h
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.Ft "GElf_Cap *"
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.Fn gelf_getcap "Elf_Data *data" "int ndx" "GElf_Cap *cap"
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.Ft int
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.Fn gelf_update_cap "Elf_Data *data" "int ndx" "GElf_Cap *cap"
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.Sh DESCRIPTION
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These convenience functions are used to retrieve and update class-dependent
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.Vt Elf32_Cap
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or
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.Vt Elf64_Cap
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information.
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.Pp
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Argument
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.Ar data
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is an
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.Vt Elf_Data
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descriptor associated with a section of type
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.Dv SHT_SUNW_cap .
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Argument
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.Ar ndx
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is the index of the entry being retrieved or updated.
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The class-independent
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.Vt GElf_Cap
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structure is described in
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.Xr gelf 3 .
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.Pp
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Function
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.Fn gelf_getcap
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retrieves the class-dependent entry at index
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.Ar ndx
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in data buffer
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.Ar data
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and copies it to the destination pointed to by argument
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.Ar cap
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after translation to class-independent form.
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.Pp
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Function
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.Fn gelf_update_cap
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converts the class-independent entry pointed to
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by argument
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.Ar cap
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to class-dependent form, and writes it to the entry at index
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.Ar ndx
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in the data buffer described by argument
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.Ar data .
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Function
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.Fn gelf_update_cap
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signals an error if any of the values in the class-independent
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representation exceeds the representable limits of the target
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type.
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.Sh RETURN VALUES
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Function
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.Fn gelf_getcap
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returns the value of argument
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.Ar cap
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if successful, or NULL in case of an error.
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Function
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.Fn gelf_update_cap
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returns a non-zero value if successful, or zero in case of an error.
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.Sh ERRORS
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These functions 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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Arguments
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.Ar data
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or
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.Ar cap
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were NULL.
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.It Bq Er ELF_E_ARGUMENT
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Argument
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.Ar ndx
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was less than zero or larger than the number of entries in the data
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descriptor.
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.It Bq Er ELF_E_ARGUMENT
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Data descriptor
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.Ar data
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was not associated with a section of type
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.Dv SHT_SUNW_cap .
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.It Bq Er ELF_E_RANGE
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A value was not representable in the target type.
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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_getdata 3 ,
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.Xr elf_getscn 3 ,
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.Xr gelf 3
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