2006-11-11 17:16:35 +00:00
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.\" Copyright (c) 2006 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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.\" $FreeBSD$
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.\"
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.Dd August 27, 2006
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.Os
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2006-11-13 09:46:16 +00:00
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.Dt GELF_GETSHDR 3
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2006-11-11 17:16:35 +00:00
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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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