8ee020ccf7
- make document title match filename; - remove hard sentence breaks, whitespace at EOL, and double whitespace; - sort SEE ALSO xrefs, adding missing section numbers; - fix a misspelled macro name.
124 lines
3.4 KiB
Groff
124 lines
3.4 KiB
Groff
.\" Copyright (c) 2006 Joseph Koshy. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" This software is provided by Joseph Koshy ``as is'' and
|
|
.\" any express or implied warranties, including, but not limited to, the
|
|
.\" implied warranties of merchantability and fitness for a particular purpose
|
|
.\" are disclaimed. in no event shall Joseph Koshy be liable
|
|
.\" for any direct, indirect, incidental, special, exemplary, or consequential
|
|
.\" damages (including, but not limited to, procurement of substitute goods
|
|
.\" or services; loss of use, data, or profits; or business interruption)
|
|
.\" however caused and on any theory of liability, whether in contract, strict
|
|
.\" liability, or tort (including negligence or otherwise) arising in any way
|
|
.\" out of the use of this software, even if advised of the possibility of
|
|
.\" such damage.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd August 29, 2006
|
|
.Os
|
|
.Dt GELF_GETDYN 3
|
|
.Sh NAME
|
|
.Nm gelf_getdyn ,
|
|
.Nm gelf_update_dyn
|
|
.Nd read and update ELF dynamic entries
|
|
.Sh LIBRARY
|
|
.Lb libelf
|
|
.Sh SYNOPSIS
|
|
.In gelf.h
|
|
.Ft "GElf_Dyn *"
|
|
.Fn gelf_getdyn "Elf_Data *data" "int ndx" "GElf_Dyn *dyn"
|
|
.Ft int
|
|
.Fn gelf_update_dyn "Elf_Data *data" "int ndx" "GElf_Dyn *dyn"
|
|
.Sh DESCRIPTION
|
|
These convenience functions are used to retrieve and update class-dependent
|
|
.Vt Elf32_Dyn
|
|
or
|
|
.Vt Elf64_Dyn
|
|
information in the
|
|
.Sy dynamic
|
|
table of an ELF object.
|
|
.Pp
|
|
Argument
|
|
.Ar data
|
|
is an
|
|
.Vt Elf_Data
|
|
descriptor associated with a section of type
|
|
.Dv SHT_DYNAMIC .
|
|
Argument
|
|
.Ar ndx
|
|
is the index of the entry being retrieved or updated.
|
|
The class-independent
|
|
.Vt GElf_Dyn
|
|
structure is described in
|
|
.Xr gelf 3 .
|
|
.Pp
|
|
Function
|
|
.Fn gelf_getdyn
|
|
retrieves the class-dependent entry at index
|
|
.Ar ndx
|
|
in data buffer
|
|
.Ar data
|
|
and copies it to the destination pointed to by argument
|
|
.Ar dyn
|
|
after translation to class-independent form.
|
|
.Pp
|
|
Function
|
|
.Fn gelf_update_dyn
|
|
converts the class-independent entry pointed to
|
|
by argument
|
|
.Ar dyn
|
|
to class-dependent form, and writes it to the entry at index
|
|
.Ar ndx
|
|
in the data buffer described by argument
|
|
.Ar data .
|
|
Function
|
|
.Fn gelf_update_dyn
|
|
signals an error if any of the values in the class-independent
|
|
representation exceeds the representable limits of the target
|
|
type.
|
|
.Sh RETURN VALUES
|
|
Function
|
|
.Fn gelf_getdyn
|
|
returns the value of argument
|
|
.Ar dyn
|
|
if successful, or NULL in case of an error.
|
|
Function
|
|
.Fn gelf_update_dyn
|
|
returns a non-zero value if successful, or zero in case of an error.
|
|
.Sh ERRORS
|
|
These functions may fail with the following errors:
|
|
.Bl -tag -width "[ELF_E_RESOURCE]"
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Arguments
|
|
.Ar data
|
|
or
|
|
.Ar dyn
|
|
were NULL.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Argument
|
|
.Ar ndx
|
|
was less than zero or larger than the number of entries in the data
|
|
descriptor.
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
Data descriptor
|
|
.Ar data
|
|
was not associated with a section of type
|
|
.Dv SHT_DYNAMIC .
|
|
.It Bq Er ELF_E_RANGE
|
|
A value was not representable in the target type.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr elf 3 ,
|
|
.Xr elf_getdata 3 ,
|
|
.Xr elf_getscn 3 ,
|
|
.Xr gelf 3
|