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diff --git a/share/doc/gdb/Patching.html b/share/doc/gdb/Patching.html new file mode 100644 index 0000000..28f14ca --- /dev/null +++ b/share/doc/gdb/Patching.html @@ -0,0 +1,112 @@ +<!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: Patching</title> + +<meta name="description" content="Debugging with GDB: Patching"> +<meta name="keywords" content="Debugging with GDB: Patching"> +<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="Altering.html#Altering" rel="up" title="Altering"> +<link href="Compiling-and-Injecting-Code.html#Compiling-and-Injecting-Code" rel="next" title="Compiling and Injecting Code"> +<link href="Calling.html#Calling" rel="previous" title="Calling"> +<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="Patching"></a> +<div class="header"> +<p> +Next: <a href="Compiling-and-Injecting-Code.html#Compiling-and-Injecting-Code" accesskey="n" rel="next">Compiling and Injecting Code</a>, Previous: <a href="Calling.html#Calling" accesskey="p" rel="previous">Calling</a>, Up: <a href="Altering.html#Altering" accesskey="u" rel="up">Altering</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="Patching-Programs"></a> +<h3 class="section">17.6 Patching Programs</h3> + +<a name="index-patching-binaries"></a> +<a name="index-writing-into-executables"></a> +<a name="index-writing-into-corefiles"></a> + +<p>By default, <small>GDB</small> opens the file containing your program’s +executable code (or the corefile) read-only. This prevents accidental +alterations to machine code; but it also prevents you from intentionally +patching your program’s binary. +</p> +<p>If you’d like to be able to patch the binary, you can specify that +explicitly with the <code>set write</code> command. For example, you might +want to turn on internal debugging flags, or even to make emergency +repairs. +</p> +<dl compact="compact"> +<dd><a name="index-set-write"></a> +</dd> +<dt><code>set write on</code></dt> +<dt><code>set write off</code></dt> +<dd><p>If you specify ‘<samp>set write on</samp>’, <small>GDB</small> opens executable and +core files for both reading and writing; if you specify <kbd>set write +off</kbd> (the default), <small>GDB</small> opens them read-only. +</p> +<p>If you have already loaded a file, you must load it again (using the +<code>exec-file</code> or <code>core-file</code> command) after changing <code>set +write</code>, for your new setting to take effect. +</p> +</dd> +<dt><code>show write</code></dt> +<dd><a name="index-show-write"></a> +<p>Display whether executable files and core files are opened for writing +as well as reading. +</p></dd> +</dl> + + + + +</body> +</html> |