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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2006-11-13 09:46:16 +00:00
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.Dt GELF_UPDATE_EHDR 3
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2010-04-14 19:08:06 +00:00
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.Os
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2006-11-11 17:16:35 +00:00
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.Sh NAME
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.Nm gelf_update_ehdr ,
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.Nm gelf_update_phdr ,
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.Nm gelf_update_shdr
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.Nd update underlying ELF data structures
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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 int
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.Fn gelf_update_ehdr "Elf *elf" "GElf_Ehdr *ehdr"
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.Ft int
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.Fn gelf_update_phdr "Elf *elf" "int ndx" "GElf_Phdr *phdr"
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.Ft int
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.Fn gelf_update_shdr "Elf_Scn *scn" "GElf_Shdr *shdr"
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.Sh DESCRIPTION
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These functions are used to update ELF data structures on the underlying
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ELF descriptor.
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Class-dependent data structures in the underlying ELF descriptor
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are updated using the data in the class-independent GElf descriptors
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and the underlying ELF data structures are marked
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.Dq dirty .
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The conversion process signals an error if the values being copied
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to the target ELF data structure would exceed representation
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limits.
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GElf descriptors are 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_update_ehdr
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updates the ELF Executable Header with the values in the
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class-independent executable header
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.Ar ehdr .
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.Pp
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Function
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.Fn gelf_update_phdr
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updates the ELF Program Header structure at index
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.Ar ndx
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with the values in the class-independent program header
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.Ar phdr .
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.Pp
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Function
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.Fn gelf_update_shdr
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updates the ELF Section Header structure associated with section
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descriptor
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.Ar scn
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with the values in argument
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.Ar shdr .
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.Sh RETURN VALUES
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These functions return a non-zero integer on success, or zero in case
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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 elf ,
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.Ar ehdr ,
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.Ar phdr ,
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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 elf
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was not a descriptor for an ELF object.
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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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had an unsupported ELF class.
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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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exceeded the number of entries in the program header table.
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.It Bq Er ELF_E_ARGUMENT
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Section descriptor
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.Ar scn
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was not associated with an ELF descriptor.
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.It Bq Er ELF_E_MODE
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ELF descriptor
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.Ar elf
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was not opened for writing or updating.
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.It Bq Er ELF_E_RESOURCE
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An out of memory condition was detected.
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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_flagelf 3 ,
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.Xr elf_flagphdr 3 ,
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.Xr elf_flagshdr 3 ,
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.Xr gelf 3 ,
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.Xr gelf_getehdr 3 ,
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.Xr gelf_getphdr 3 ,
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.Xr gelf_getshdr 3
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