2006-11-11 17:16:35 +00:00
|
|
|
.\" 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 November 5, 2006
|
2006-11-13 09:46:16 +00:00
|
|
|
.Dt GELF_GETSYMSHNDX 3
|
2010-04-14 19:08:06 +00:00
|
|
|
.Os
|
2006-11-11 17:16:35 +00:00
|
|
|
.Sh NAME
|
|
|
|
|
.Nm gelf_getsymshndx ,
|
|
|
|
|
.Nm gelf_update_symshndx
|
|
|
|
|
.Nd read and update symbol information using extended section indices
|
|
|
|
|
.Sh LIBRARY
|
|
|
|
|
.Lb libelf
|
|
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.In gelf.h
|
|
|
|
|
.Ft "GElf_Sym *"
|
2006-12-13 15:14:46 +00:00
|
|
|
.Fo gelf_getsymshndx
|
2006-11-11 17:16:35 +00:00
|
|
|
.Fa "Elf_Data *symdata"
|
|
|
|
|
.Fa "Elf_Data *xndxdata"
|
|
|
|
|
.Fa "int ndx"
|
|
|
|
|
.Fa "GElf_Sym *sym"
|
|
|
|
|
.Fa "Elf32_Word *xndxptr"
|
|
|
|
|
.Fc
|
|
|
|
|
.Ft int
|
2006-12-13 15:14:46 +00:00
|
|
|
.Fo gelf_update_symshndx
|
2006-11-11 17:16:35 +00:00
|
|
|
.Fa "Elf_Data *symdata"
|
|
|
|
|
.Fa "Elf_Data *xndxdata"
|
|
|
|
|
.Fa "int ndx"
|
|
|
|
|
.Fa "GElf_Sym *sym"
|
|
|
|
|
.Fa "Elf32_Word xndx"
|
|
|
|
|
.Fc
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
These functions are analogous to
|
|
|
|
|
.Fn gelf_getsym
|
|
|
|
|
and
|
|
|
|
|
.Fn gelf_update_sym
|
|
|
|
|
respectively, but are capable of handling symbol tables using extended
|
|
|
|
|
section numbering.
|
|
|
|
|
.Pp
|
|
|
|
|
Argument
|
|
|
|
|
.Ar symdata
|
|
|
|
|
is an
|
|
|
|
|
.Vt Elf_Data
|
|
|
|
|
descriptor associated with a section of type
|
|
|
|
|
.Dv SHT_SYMTAB .
|
|
|
|
|
Argument
|
|
|
|
|
.Ar xndxdata
|
|
|
|
|
is an
|
|
|
|
|
.Vt Elf_Data
|
|
|
|
|
descriptor associated with a section of type
|
|
|
|
|
.Dv SHT_SYMTAB_SHNDX .
|
|
|
|
|
Argument
|
|
|
|
|
.Ar ndx
|
|
|
|
|
is the index of the symbol table entry being retrieved or updated.
|
|
|
|
|
Argument
|
|
|
|
|
.Ar sym
|
|
|
|
|
is a pointer to a class-independent
|
|
|
|
|
.Vt GElf_Sym
|
|
|
|
|
structure.
|
|
|
|
|
.Vt GElf_Sym
|
|
|
|
|
structures are described in detail in
|
|
|
|
|
.Xr gelf 3 .
|
|
|
|
|
.Pp
|
|
|
|
|
Function
|
|
|
|
|
.Fn gelf_getsymshndx
|
|
|
|
|
retrieves symbol information at index
|
|
|
|
|
.Ar ndx
|
|
|
|
|
from the data descriptor specified by argument
|
|
|
|
|
.Ar symdata
|
|
|
|
|
and stores in class-independent form in argument
|
|
|
|
|
.Ar sym .
|
|
|
|
|
In addition it retrieves the extended section index for the
|
|
|
|
|
symbol from data buffer
|
|
|
|
|
.Ar xndxdata
|
|
|
|
|
and stores it into the location pointed to by argument
|
|
|
|
|
.Ar xndxptr .
|
|
|
|
|
.Pp
|
|
|
|
|
Function
|
|
|
|
|
.Fn gelf_update_symshndx
|
|
|
|
|
updates the underlying symbol table entry in data
|
|
|
|
|
descriptor
|
|
|
|
|
.Ar symdata
|
|
|
|
|
with the information in argument
|
|
|
|
|
.Ar sym .
|
|
|
|
|
In addition it sets the extended section index in
|
|
|
|
|
data buffer
|
|
|
|
|
.Ar xndxdata
|
|
|
|
|
to the value of argument
|
|
|
|
|
.Ar xndx .
|
|
|
|
|
.Sh RETURN VALUES
|
|
|
|
|
Function
|
|
|
|
|
.Fn gelf_getsymshndx
|
|
|
|
|
returns the value of argument
|
|
|
|
|
.Ar sym
|
|
|
|
|
if successful, or NULL in case of an error.
|
|
|
|
|
.Pp
|
|
|
|
|
Function
|
|
|
|
|
.Fn gelf_update_symshndx
|
|
|
|
|
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 symdata ,
|
|
|
|
|
.Ar xndxdata ,
|
|
|
|
|
.Ar xndxptr
|
|
|
|
|
or
|
|
|
|
|
.Ar sym
|
|
|
|
|
were NULL.
|
|
|
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
|
|
|
Argument
|
|
|
|
|
.Ar ndx
|
|
|
|
|
was less than zero, or too large for either of descriptors
|
|
|
|
|
.Ar symdata
|
|
|
|
|
or
|
|
|
|
|
.Ar xndxdata .
|
|
|
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
|
|
|
Data descriptor
|
|
|
|
|
.Ar symdata
|
|
|
|
|
was not associated with a section of type
|
|
|
|
|
.Dv SHT_SYMTAB .
|
|
|
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
|
|
|
Data descriptor
|
|
|
|
|
.Ar xndxdata
|
|
|
|
|
was not associated with a section of type
|
|
|
|
|
.Dv SHT_SYMTAB_SHNDX .
|
|
|
|
|
.It Bq Er ELF_E_ARGUMENT
|
|
|
|
|
Data descriptor
|
|
|
|
|
.Ar symdata
|
|
|
|
|
and
|
|
|
|
|
.Ar xndxdata
|
|
|
|
|
were associated with different ELF objects.
|
|
|
|
|
.El
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr elf 3 ,
|
|
|
|
|
.Xr elf_getdata 3 ,
|
|
|
|
|
.Xr elf_getscn 3 ,
|
|
|
|
|
.Xr gelf 3 ,
|
|
|
|
|
.Xr gelf_getsym 3 ,
|
|
|
|
|
.Xr gelf_update_sym 3
|
