ELFIO/doc/site/oldsite/x35.htm
2012-03-09 14:20:44 +02:00

188 lines
3.2 KiB
HTML
Executable File

<HTML
><HEAD
><TITLE
>ELF File Sections</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.74b"><LINK
REL="HOME"
TITLE="ELFIO"
HREF="index.php"><LINK
REL="UP"
TITLE="Getting Started With ELFIO"
HREF="c18.htm"><LINK
REL="PREVIOUS"
TITLE="Getting Started With ELFIO"
HREF="c18.htm"><LINK
REL="NEXT"
TITLE="Section Readers"
HREF="x45.htm"></HEAD
><BODY
CLASS="SECT1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>ELFIO: Tutorial</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="c18.htm"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 1. Getting Started With ELFIO</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="x45.htm"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN35"
>ELF File Sections</A
></H1
>
<P
> ELF binary files consist of several sections. Each section has it's own
responsibility: some contain executable code; others describe program dependencies;
others symbol tables and so on. See the TIS documentation for a full description of each section.
</P
>
<P
> To see how many sections the ELF file contains, including their
names and sizes, is demonstated in the following code:
<PRE
CLASS="PROGRAMLISTING"
> int nSecNo = pReader-&#62;GetSectionsNum();
for ( int i = 0; i &#60; nSecNo; ++i ) { // For all sections
const IELFISection* pSec = pReader-&#62;GetSection( i );
std::cout &#60;&#60; pSec-&#62;GetName() &#60;&#60; '' ''
&#60;&#60; pSec-&#62;GetSize() &#60;&#60; std::endl;
pSec-&#62;Release();
}</PRE
>
</P
>
<P
> First, the number of sections are received; next, a pointer
on the <FONT
COLOR="RED"
>IELFISection</FONT
> interface. Using this interface,
access is gained to the different section attributes: size, type, flags and address.
To get a buffer that contains the section's bytes use the
<TT
CLASS="METHODNAME"
>GetData()</TT
> member function of this interface.
See the <FONT
COLOR="RED"
>IELFISection</FONT
> declaration for a full
description of the <FONT
COLOR="RED"
>IELFISection</FONT
> interface.
</P
>
</DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="c18.htm"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.php"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="x45.htm"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Getting Started With ELFIO</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="c18.htm"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Section Readers</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>