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
116 lines
3.2 KiB
Groff
116 lines
3.2 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_getshdr.3 3639 2018-10-14 14:07:02Z jkoshy $
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.\"
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.Dd August 27, 2006
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.Dt GELF_GETSHDR 3
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.Os
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.Sh NAME
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.Nm elf32_getshdr ,
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.Nm elf64_getshdr ,
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.Nm gelf_getshdr
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.Nd retrieve the class-dependent section header
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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 "Elf32_Shdr *"
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.Fn elf32_getshdr "Elf_Scn *scn"
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.Ft "Elf64_Shdr *"
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.Fn elf64_getshdr "Elf_Scn *scn"
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.In gelf.h
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.Ft "GElf_Shdr *"
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.Fn gelf_getshdr "Elf_Scn *scn" "GElf_Shdr *shdr"
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.Sh DESCRIPTION
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These functions return a pointer to the ELF Section Header data
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structure associated with section descriptor
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.Ar scn .
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.Pp
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Function
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.Fn elf32_getshdr
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retrieves a pointer to an
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.Vt Elf32_Shdr
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structure.
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Section descriptor
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.Ar scn
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must be associated with an ELF descriptor of class
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.Dv ELFCLASS32 .
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.Pp
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Function
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.Fn elf64_getshdr
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retrieves a pointer to an
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.Vt Elf64_Shdr
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structure.
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Section descriptor
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.Ar scn
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must be associated with an ELF descriptor of class
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.Dv ELFCLASS64 .
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.Pp
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Function
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.Fn gelf_getshdr
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copies the values in the section header associated with argument
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.Ar scn
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to the structure pointed to be argument
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.Ar dst .
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The
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.Vt GElf_Shdr
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data structure is described in
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.Xr gelf 3 .
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.Sh RETURN VALUES
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Functions
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.Fn elf32_getshdr
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and
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.Fn elf64_getshdr
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return a valid pointer to the appropriate section header on success
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or NULL if an error was encountered.
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.Pp
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Function
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.Fn gelf_getshdr
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returns argument
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.Ar dst
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if successful, or NULL if an error was encountered.
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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 scn
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or
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.Ar shdr
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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 scn
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was not associated a descriptor for an ELF object.
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.It Bq Er ELF_E_CLASS
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The ELF class associated with the section descriptor
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.Ar scn
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did not match the class expected by the API.
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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_getscn 3 ,
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.Xr gelf 3 ,
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.Xr gelf_update_shdr 3
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