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>Section Readers</A
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>
<P
> After the section data is received through the <TT
CLASS="METHODNAME"
>GetData()</TT
>
function call, the data can be manipulated.
There are special sections
that provide information in predefined forms. The ELFIO library
processes these sections. The library provides a set of
section readers that understand these predefined formats and how to process their data.
The ELFIO.h header file currently defines the types of readers as:
<PRE
CLASS="PROGRAMLISTING"
> enum ReaderType {
ELFI_STRING, // Strings reader
ELFI_SYMBOL, // Symbol table reader
ELFI_RELOCATION, // Relocation table reader
ELFI_NOTE, // Notes reader
ELFI_DYNAMIC, // Dynamic section reader
ELFI_HASH // Hash
};</PRE
>
</P
>
<P
> How to use the symbol table reader will be demonstated in the following example:
</P
>
<P
> First, get the symbol section:
<PRE
CLASS="PROGRAMLISTING"
> const IELFISection* pSec = pReader->GetSection( ''.symtab'' );</PRE
>
</P
>
<P
> Second, create a symbol section reader:
<PRE
CLASS="PROGRAMLISTING"
> IELFISymbolTable* pSymTbl = 0;
pReader->CreateSectionReader( IELFI::ELFI_SYMBOL,
pSec,
(void**)&pSymTbl );</PRE
>
</P
>
<P
> And finally, use the section reader to process all entries
(print operations are omitted):
<PRE
CLASS="PROGRAMLISTING"
> std::string name;
Elf32_Addr value;
Elf32_Word size;
unsigned char bind;
unsigned char type;
Elf32_Half section;
int nSymNo = pSymTbl->GetSymbolNum();
if ( 0 < nSymNo ) {
for ( int i = 0; i < nSymNo; ++i ) {
pSymTbl->GetSymbol( i, name, value, size,
bind, type, section );
}
}
pSymTbl->Release();
pSec->Release();</PRE
>
</P
>
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