You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
152 lines
7.5 KiB
HTML
152 lines
7.5 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Copyright (C) 1988-2019 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 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>Disassembly In Guile (Debugging with GDB)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Disassembly In Guile (Debugging with GDB)">
|
||
|
|
<meta name="keywords" content="Disassembly In Guile (Debugging with GDB)">
|
||
|
|
<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="Guile-API.html#Guile-API" rel="up" title="Guile API">
|
||
|
|
<link href="I_002fO-Ports-in-Guile.html#I_002fO-Ports-in-Guile" rel="next" title="I/O Ports in Guile">
|
||
|
|
<link href="Architectures-In-Guile.html#Architectures-In-Guile" rel="prev" title="Architectures In Guile">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
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.nolinebreak {white-space: nowrap}
|
||
|
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<a name="Disassembly-In-Guile"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="I_002fO-Ports-in-Guile.html#I_002fO-Ports-in-Guile" accesskey="n" rel="next">I/O Ports in Guile</a>, Previous: <a href="Architectures-In-Guile.html#Architectures-In-Guile" accesskey="p" rel="prev">Architectures In Guile</a>, Up: <a href="Guile-API.html#Guile-API" accesskey="u" rel="up">Guile API</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="Disassembly-In-Guile-1"></a>
|
||
|
|
<h4 class="subsubsection">23.3.3.22 Disassembly In Guile</h4>
|
||
|
|
|
||
|
|
<p>The disassembler can be invoked from Scheme code.
|
||
|
|
Furthermore, the disassembler can take a Guile port as input,
|
||
|
|
allowing one to disassemble from any source, and not just target memory.
|
||
|
|
</p>
|
||
|
|
<dl>
|
||
|
|
<dt><a name="index-arch_002ddisassemble"></a>Scheme Procedure: <strong>arch-disassemble</strong> <em>arch start-pc <span class="roman">[</span>#:port port<span class="roman">]</span> <span class="roman">[</span>#:offset offset<span class="roman">]</span> <span class="roman">[</span>#:size size<span class="roman">]</span> <span class="roman">[</span>#:count count<span class="roman">]</span></em></dt>
|
||
|
|
<dd><p>Return a list of disassembled instructions starting from the memory
|
||
|
|
address <var>start-pc</var>.
|
||
|
|
</p>
|
||
|
|
<p>The optional argument <var>port</var> specifies the input port to read bytes from.
|
||
|
|
If <var>port</var> is <code>#f</code> then bytes are read from target memory.
|
||
|
|
</p>
|
||
|
|
<p>The optional argument <var>offset</var> specifies the address offset of the
|
||
|
|
first byte in <var>port</var>. This is useful, for example, when <var>port</var>
|
||
|
|
specifies a ‘<samp>bytevector</samp>’ and you want the bytevector to be disassembled
|
||
|
|
as if it came from that address. The <var>start-pc</var> passed to the reader
|
||
|
|
for <var>port</var> is offset by the same amount.
|
||
|
|
</p>
|
||
|
|
<p>Example:
|
||
|
|
</p><div class="smallexample">
|
||
|
|
<pre class="smallexample">(gdb) guile (use-modules (rnrs io ports))
|
||
|
|
(gdb) guile (define pc (value->integer (parse-and-eval "$pc")))
|
||
|
|
(gdb) guile (define mem (open-memory #:start pc))
|
||
|
|
(gdb) guile (define bv (get-bytevector-n mem 10))
|
||
|
|
(gdb) guile (define bv-port (open-bytevector-input-port bv))
|
||
|
|
(gdb) guile (define arch (current-arch))
|
||
|
|
(gdb) guile (arch-disassemble arch pc #:port bv-port #:offset pc)
|
||
|
|
(((address . 4195516) (asm . "mov $0x4005c8,%edi") (length . 5)))
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
<p>The optional arguments <var>size</var> and
|
||
|
|
<var>count</var> determine the number of instructions in the returned list.
|
||
|
|
If either <var>size</var> or <var>count</var> is specified as zero, then
|
||
|
|
no instructions are disassembled and an empty list is returned.
|
||
|
|
If both the optional arguments <var>size</var> and <var>count</var> are
|
||
|
|
specified, then a list of at most <var>count</var> disassembled instructions
|
||
|
|
whose start address falls in the closed memory address interval from
|
||
|
|
<var>start-pc</var> to (<var>start-pc</var> + <var>size</var> - 1) are returned.
|
||
|
|
If <var>size</var> is not specified, but <var>count</var> is specified,
|
||
|
|
then <var>count</var> number of instructions starting from the address
|
||
|
|
<var>start-pc</var> are returned. If <var>count</var> is not specified but
|
||
|
|
<var>size</var> is specified, then all instructions whose start address
|
||
|
|
falls in the closed memory address interval from <var>start-pc</var> to
|
||
|
|
(<var>start-pc</var> + <var>size</var> - 1) are returned.
|
||
|
|
If neither <var>size</var> nor <var>count</var> are specified, then a single
|
||
|
|
instruction at <var>start-pc</var> is returned.
|
||
|
|
</p>
|
||
|
|
<p>Each element of the returned list is an alist (associative list)
|
||
|
|
with the following keys:
|
||
|
|
</p>
|
||
|
|
<dl compact="compact">
|
||
|
|
<dt><code>address</code></dt>
|
||
|
|
<dd><p>The value corresponding to this key is a Guile integer of
|
||
|
|
the memory address of the instruction.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>asm</code></dt>
|
||
|
|
<dd><p>The value corresponding to this key is a string value which represents
|
||
|
|
the instruction with assembly language mnemonics. The assembly
|
||
|
|
language flavor used is the same as that specified by the current CLI
|
||
|
|
variable <code>disassembly-flavor</code>. See <a href="Machine-Code.html#Machine-Code">Machine Code</a>.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>length</code></dt>
|
||
|
|
<dd><p>The value corresponding to this key is the length of the instruction in bytes.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
</dd></dl>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="I_002fO-Ports-in-Guile.html#I_002fO-Ports-in-Guile" accesskey="n" rel="next">I/O Ports in Guile</a>, Previous: <a href="Architectures-In-Guile.html#Architectures-In-Guile" accesskey="p" rel="prev">Architectures In Guile</a>, Up: <a href="Guile-API.html#Guile-API" accesskey="u" rel="up">Guile API</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>
|