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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gdb/Jumping.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/gdb/Jumping.html b/share/doc/gdb/Jumping.html new file mode 100644 index 0000000..2cf4ca0 --- /dev/null +++ b/share/doc/gdb/Jumping.html @@ -0,0 +1,133 @@ +<!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: Jumping</title> + +<meta name="description" content="Debugging with GDB: Jumping"> +<meta name="keywords" content="Debugging with GDB: Jumping"> +<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="Signaling.html#Signaling" rel="next" title="Signaling"> +<link href="Assignment.html#Assignment" rel="previous" title="Assignment"> +<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="Jumping"></a> +<div class="header"> +<p> +Next: <a href="Signaling.html#Signaling" accesskey="n" rel="next">Signaling</a>, Previous: <a href="Assignment.html#Assignment" accesskey="p" rel="previous">Assignment</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="Continuing-at-a-Different-Address"></a> +<h3 class="section">17.2 Continuing at a Different Address</h3> + +<p>Ordinarily, when you continue your program, you do so at the place where +it stopped, with the <code>continue</code> command. You can instead continue at +an address of your own choosing, with the following commands: +</p> +<dl compact="compact"> +<dd><a name="index-jump"></a> +<a name="index-j-_0028jump_0029"></a> +</dd> +<dt><code>jump <var>locspec</var></code></dt> +<dt><code>j <var>locspec</var></code></dt> +<dd><p>Resume execution at the address of the code location that results from +resolving <var>locspec</var>. +See <a href="Location-Specifications.html#Location-Specifications">Location Specifications</a>, for a description of the different +forms of <var>locspec</var>. If <var>locspec</var> resolves to more than one +address, the command aborts before jumping. +Execution stops again immediately if there is a breakpoint there. It +is common practice to use the <code>tbreak</code> command in conjunction +with <code>jump</code>. See <a href="Set-Breaks.html#Set-Breaks">Setting Breakpoints</a>. +</p> +<p>The <code>jump</code> command does not change the current stack frame, or +the stack pointer, or the contents of any memory location or any +register other than the program counter. If <var>locspec</var> resolves to +an address in a different function from the one currently executing, the +results may be bizarre if the two functions expect different patterns +of arguments or of local variables. For this reason, the <code>jump</code> +command requests confirmation if the jump address is not in the +function currently executing. However, even bizarre results are +predictable if you are well acquainted with the machine-language code +of your program. +</p></dd> +</dl> + +<p>On many systems, you can get much the same effect as the <code>jump</code> +command by storing a new value into the register <code>$pc</code>. The +difference is that this does not start your program running; it only +changes the address of where it <em>will</em> run when you continue. For +example, +</p> +<div class="smallexample"> +<pre class="smallexample">set $pc = 0x485 +</pre></div> + +<p>makes the next <code>continue</code> command or stepping command execute at +address <code>0x485</code>, rather than at the address where your program stopped. +See <a href="Continuing-and-Stepping.html#Continuing-and-Stepping">Continuing and Stepping</a>. +</p> +<p>The most common occasion to use the <code>jump</code> command is to back +up—perhaps with more breakpoints set—over a portion of a program +that has already executed, in order to examine its execution in more +detail. +</p> +<hr> +<div class="header"> +<p> +Next: <a href="Signaling.html#Signaling" accesskey="n" rel="next">Signaling</a>, Previous: <a href="Assignment.html#Assignment" accesskey="p" rel="previous">Assignment</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> + + + +</body> +</html> |