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<fpdoc-descriptions>
<package name="rtl">

<!--
  ====================================================================
    exeinfo
  ====================================================================
-->

<module name="exeinfo">
<short>Return executable information</short>
<descr>
<p>
The <file>exeinfo</file> unit implements some cross-platform routines to 
examine the contents of an executable: information about sections, mapping
addresses to loaded modules etc.
</p>
<p>
It is mainly used by the <link id="#rtl.lineinfo">lineinfo</link> and
<link id="#rtl.lnfodwrf">lnfodwrf</link> unit to examine the binary for
debug info.
</p>
</descr>

<!-- record type Visibility: default -->
<element name="TExeFile">
<short>Structure describing the binary.</short>
<descr>
<p>
<var>TExeFile</var> is a record used in the various calls of this unit.
It contains a file descriptor, and various fields that describe the 
executable.
</p>
<p>
The structure of <var>TExeFile</var> is opaque, that is, one shouldn't
rely on the exactness of this structure, it may change any time in the
future.
</p>
</descr>
<seealso>
<link id="OpenExeFile"/>
<link id="CloseExeFile"/>
</seealso>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.f">
<short>File handle to the executable image on disk.</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.size">
<short>Size of the executable</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.isopen">
<short>Is the file handle <var>f</var> open ?</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.nsects">
<short>Number of sections in the binary</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.sechdrofs">
<short>Section header offset</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.secstrofs">
<short>Section strings offset.</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.processaddress">
<short>Used on BEOS only</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.FunctionRelative">
<short>Internal variable</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.ImgOffset">
<short>Image offset</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.filename">
<short>Filename of binary file</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.buf">
<short>Buffer used in internal read operations</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.bufsize">
<short>Size of internal buffer</short>
</element>

<!-- variable Visibility: default -->
<element name="TExeFile.bufcnt">
<short>Number of bytes in the buffer.</short>
</element>

<!-- function Visibility: default -->
<element name="OpenExeFile">
<short>Open an executable file</short>
<descr>
<p>
<var>OpenExeFile</var> opens the executable file <var>fn</var> and
initializes the structure <var>e</var> for subsequent calls to routines in 
the <var>exeinfo</var> unit.
</p>
<p>
The function returns <var>True</var> if the file was opened successfully,
false otherwise.
</p>
</descr>
<seealso>
<link id="FindExeSection"/>
<link id="CloseExeFile"/>
<link id="ReadDebugLink"/>
</seealso>
</element>

<!-- function result Visibility: default -->
<element name="OpenExeFile.Result"> 
<short><var>True</var> if the file was opened successfully, <var>false</var> otherwise.</short>
</element>

<!-- argument Visibility: default -->
<element name="OpenExeFile.e">
<short>Record to be used in other calls in this unit.</short>
</element>

<!-- argument Visibility: default -->
<element name="OpenExeFile.fn">
<short>Name of file to be opened.</short>
</element>

<!-- function Visibility: default -->
<element name="FindExeSection">
<short>Find a section in the binary image.</short>
<descr>
<p>
<var>FindExeSection</var> examines the binary that was opened with <link
id="OpenExeFile"/> (represented by <var>e</var>) and searches for the
section named <var>secname</var>. If found, the section offset is returned
in <var>secofs</var> and the section length (in bytes) is returned in
<var>seclen</var>.
</p>
<p>
The function returns <var>True</var> if the section was found,
<var>False</var> if not.
</p>
</descr>
<seealso>
<link id="OpenExeFile"/>
</seealso>
</element>

<!-- function result Visibility: default -->
<element name="FindExeSection.Result">
<short><var>True</var> if the section was found, <var>False</var> if not</short>
</element>

<!-- argument Visibility: default -->
<element name="FindExeSection.e">
<short>Record representing the opened executable image</short>
</element>

<!-- argument Visibility: default -->
<element name="FindExeSection.secname">
<short>Name of section that must be found</short>
</element>

<!-- argument Visibility: default -->
<element name="FindExeSection.secofs">
<short>Offset of the section in the binary image.</short>
</element>

<!-- argument Visibility: default -->
<element name="FindExeSection.seclen">
<short>Length of the section in bytes.</short>
</element>

<!-- function Visibility: default -->
<element name="CloseExeFile">
<short>Close a previously opened file.</short>
<descr>
<p>
<var>CloseExeFile</var> closes an executable file image previously opened
with <link id="OpenExeFile"/>, and represented by <var>e</var>. 
</p>
<p>
The function returns <var>True</var> if the file was closed successfully,
or <var>False</var> if something went wrong.
</p>
</descr>
<errors>
In case of an error, <var>False</var> is returned.
</errors>
<seealso>
<link id="OpenExeFile"/>
</seealso>
</element>

<!-- function result Visibility: default -->
<element name="CloseExeFile.Result">
<short><var>True</var> if the file was closed successfully, <var>False</var> if not.</short>
</element>

<!-- argument Visibility: default -->
<element name="CloseExeFile.e">
<short>Executable to be closed</short>
</element>

<!-- function Visibility: default -->
<element name="ReadDebugLink">
<short>Read the location of a debug info filename</short>
<descr>
<p>
<var>ReadDebugLink</var> examines the <var>.gnu_debuglink</var> section to
see if the debug information is stored in an external file. If so, then the
name of the file with the debug information is returned in the
<var>dbgfn</var> parameter.
</p>
<p>
The function returns <var>false</var> if there is no external debug information file,
or if the file with debug information does not exist. It is searched next
to the binary file or in the current directory.
</p>
</descr>
<seealso>
<link id="OpenExeFile"/>
<link id="CloseExeFile"/>
</seealso>
</element>

<!-- function result Visibility: default -->
<element name="ReadDebugLink.Result">
<short><var>True</var> if the file with debug information was found, <var>False</var> if not.</short>
</element>

<!-- argument Visibility: default -->
<element name="ReadDebugLink.e">
<short>Handle on the open application binary.</short>
</element>

<!-- argument Visibility: default -->
<element name="ReadDebugLink.dbgfn">
<short>Name of the file with the debug information.</short>
</element>

<!-- procedure Visibility: default -->
<element name="GetModuleByAddr">
<short>Return the module name by address</short>
<descr>
<var>GetModuleByAddr</var> returns the name of the module that contains
address <var>addr</var>. If successful, it returns <var>True</var> and
returns the filename in <var>FileName</var> and the base address at which
it is loaded in <var>BaseAddr</var>.
</descr>
</element>

<!-- argument Visibility: default -->
<element name="GetModuleByAddr.addr">
<short>Address to examine</short>
</element>

<!-- argument Visibility: default -->
<element name="GetModuleByAddr.baseaddr">
<short>Base address at which module is loaded.</short>
</element>

<!-- argument Visibility: default -->
<element name="GetModuleByAddr.filename">
<short>FileName of the module at address <var>addr</var>.</short>
</element>

</module> <!-- exeinfo -->

</package>
</fpdoc-descriptions>