mirror of
https://github.com/serge1/ELFIO.git
synced 2024-10-06 23:10:06 +00:00
215 lines
3.7 KiB
HTML
215 lines
3.7 KiB
HTML
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<HTML
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><HEAD
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><TITLE
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>Section Readers</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.74b"><LINK
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REL="HOME"
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TITLE="ELFIO"
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HREF="index.php"><LINK
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REL="UP"
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TITLE="Getting Started With ELFIO"
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HREF="c18.htm"><LINK
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REL="PREVIOUS"
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TITLE="ELF File Sections"
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HREF="x35.htm"><LINK
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REL="NEXT"
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TITLE="Finalization"
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HREF="x57.htm"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>ELFIO: Tutorial</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="x35.htm"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 1. Getting Started With ELFIO</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="x57.htm"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN45"
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>Section Readers</A
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></H1
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>
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<P
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> After the section data is received through the <TT
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CLASS="METHODNAME"
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>GetData()</TT
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>
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function call, the data can be manipulated.
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There are special sections
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that provide information in predefined forms. The ELFIO library
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processes these sections. The library provides a set of
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section readers that understand these predefined formats and how to process their data.
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The ELFIO.h header file currently defines the types of readers as:
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<PRE
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CLASS="PROGRAMLISTING"
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> enum ReaderType {
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ELFI_STRING, // Strings reader
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ELFI_SYMBOL, // Symbol table reader
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ELFI_RELOCATION, // Relocation table reader
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ELFI_NOTE, // Notes reader
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ELFI_DYNAMIC, // Dynamic section reader
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ELFI_HASH // Hash
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};</PRE
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>
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</P
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>
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<P
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> How to use the symbol table reader will be demonstated in the following example:
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</P
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>
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<P
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> First, get the symbol section:
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<PRE
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CLASS="PROGRAMLISTING"
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> const IELFISection* pSec = pReader->GetSection( ''.symtab'' );</PRE
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>
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</P
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>
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<P
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> Second, create a symbol section reader:
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<PRE
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CLASS="PROGRAMLISTING"
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> IELFISymbolTable* pSymTbl = 0;
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pReader->CreateSectionReader( IELFI::ELFI_SYMBOL,
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pSec,
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(void**)&pSymTbl );</PRE
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>
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</P
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>
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<P
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> And finally, use the section reader to process all entries
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(print operations are omitted):
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<PRE
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CLASS="PROGRAMLISTING"
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> std::string name;
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Elf32_Addr value;
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Elf32_Word size;
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unsigned char bind;
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unsigned char type;
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Elf32_Half section;
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int nSymNo = pSymTbl->GetSymbolNum();
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if ( 0 < nSymNo ) {
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for ( int i = 0; i < nSymNo; ++i ) {
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pSymTbl->GetSymbol( i, name, value, size,
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bind, type, section );
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}
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}
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pSymTbl->Release();
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pSec->Release();</PRE
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>
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</P
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>
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</DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="x35.htm"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.php"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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|
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WIDTH="33%"
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|
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="x57.htm"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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|
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>ELF File Sections</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="c18.htm"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Finalization</TD
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></TR
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></TABLE
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></DIV
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></BODY
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|
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></HTML
|
||
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>
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