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diff --git a/share/doc/gdb/Library-List-Format.html b/share/doc/gdb/Library-List-Format.html new file mode 100644 index 0000000..0c13dac --- /dev/null +++ b/share/doc/gdb/Library-List-Format.html @@ -0,0 +1,151 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Free Software" and "Free Software Needs +Free Documentation", with the Front-Cover Texts being "A GNU Manual," +and with the Back-Cover Texts as in (a) below. + +(a) The FSF's Back-Cover Text is: "You are free to copy and modify +this GNU Manual. Buying copies from GNU Press supports the FSF in +developing GNU and promoting software freedom." --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Debugging with GDB: Library List Format</title> + +<meta name="description" content="Debugging with GDB: Library List Format"> +<meta name="keywords" content="Debugging with GDB: Library List Format"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Remote-Protocol.html#Remote-Protocol" rel="up" title="Remote Protocol"> +<link href="Library-List-Format-for-SVR4-Targets.html#Library-List-Format-for-SVR4-Targets" rel="next" title="Library List Format for SVR4 Targets"> +<link href="File_002dI_002fO-Examples.html#File_002dI_002fO-Examples" rel="previous" title="File-I/O Examples"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Library-List-Format"></a> +<div class="header"> +<p> +Next: <a href="Library-List-Format-for-SVR4-Targets.html#Library-List-Format-for-SVR4-Targets" accesskey="n" rel="next">Library List Format for SVR4 Targets</a>, Previous: <a href="File_002dI_002fO-Remote-Protocol-Extension.html#File_002dI_002fO-Remote-Protocol-Extension" accesskey="p" rel="previous">File-I/O Remote Protocol Extension</a>, Up: <a href="Remote-Protocol.html#Remote-Protocol" accesskey="u" rel="up">Remote Protocol</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="Library-List-Format-1"></a> +<h3 class="section">E.14 Library List Format</h3> +<a name="index-library-list-format_002c-remote-protocol"></a> + +<p>On some platforms, a dynamic loader (e.g. <samp>ld.so</samp>) runs in the +same process as your application to manage libraries. In this case, +<small>GDB</small> can use the loader’s symbol table and normal memory +operations to maintain a list of shared libraries. On other +platforms, the operating system manages loaded libraries. +<small>GDB</small> can not retrieve the list of currently loaded libraries +through memory operations, so it uses the ‘<samp>qXfer:libraries:read</samp>’ +packet (see <a href="General-Query-Packets.html#qXfer-library-list-read">qXfer library list read</a>) instead. The remote stub +queries the target’s operating system and reports which libraries +are loaded. +</p> +<p>The ‘<samp>qXfer:libraries:read</samp>’ packet returns an XML document which +lists loaded libraries and their offsets. Each library has an +associated name and one or more segment or section base addresses, +which report where the library was loaded in memory. +</p> +<p>For the common case of libraries that are fully linked binaries, the +library should have a list of segments. If the target supports +dynamic linking of a relocatable object file, its library XML element +should instead include a list of allocated sections. The segment or +section bases are start addresses, not relocation offsets; they do not +depend on the library’s link-time base addresses. +</p> +<p><small>GDB</small> must be linked with the Expat library to support XML +library lists. See <a href="Requirements.html#Expat">Expat</a>. +</p> +<p>A simple memory map, with one loaded library relocated by a single +offset, looks like this: +</p> +<div class="smallexample"> +<pre class="smallexample"><library-list> + <library name="/lib/libc.so.6"> + <segment address="0x10000000"/> + </library> +</library-list> +</pre></div> + +<p>Another simple memory map, with one loaded library with three +allocated sections (.text, .data, .bss), looks like this: +</p> +<div class="smallexample"> +<pre class="smallexample"><library-list> + <library name="sharedlib.o"> + <section address="0x10000000"/> + <section address="0x20000000"/> + <section address="0x30000000"/> + </library> +</library-list> +</pre></div> + +<p>The format of a library list is described by this DTD: +</p> +<div class="smallexample"> +<pre class="smallexample"><!-- library-list: Root element with versioning --> +<!ELEMENT library-list (library)*> +<!ATTLIST library-list version CDATA #FIXED "1.0"> +<!ELEMENT library (segment*, section*)> +<!ATTLIST library name CDATA #REQUIRED> +<!ELEMENT segment EMPTY> +<!ATTLIST segment address CDATA #REQUIRED> +<!ELEMENT section EMPTY> +<!ATTLIST section address CDATA #REQUIRED> +</pre></div> + +<p>In addition, segments and section descriptors cannot be mixed within a +single library element, and you must supply at least one segment or +section for each library. +</p> +<hr> +<div class="header"> +<p> +Next: <a href="Library-List-Format-for-SVR4-Targets.html#Library-List-Format-for-SVR4-Targets" accesskey="n" rel="next">Library List Format for SVR4 Targets</a>, Previous: <a href="File_002dI_002fO-Remote-Protocol-Extension.html#File_002dI_002fO-Remote-Protocol-Extension" accesskey="p" rel="previous">File-I/O Remote Protocol Extension</a>, Up: <a href="Remote-Protocol.html#Remote-Protocol" accesskey="u" rel="up">Remote Protocol</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |