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.
521 lines
37 KiB
HTML
521 lines
37 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>objdump - GNU Binary Utilities</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="GNU Binary Utilities">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="prev" href="objcopy.html#objcopy" title="objcopy">
|
|
<link rel="next" href="ranlib.html#ranlib" title="ranlib">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
Copyright (C) 1991-2015 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 no Invariant Sections, with no Front-Cover Texts, and with no
|
|
Back-Cover Texts. A copy of the license is included in the
|
|
section entitled ``GNU Free Documentation License''.
|
|
|
|
-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family:serif; font-weight:normal; }
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<a name="objdump"></a>
|
|
<p>
|
|
Next: <a rel="next" accesskey="n" href="ranlib.html#ranlib">ranlib</a>,
|
|
Previous: <a rel="previous" accesskey="p" href="objcopy.html#objcopy">objcopy</a>,
|
|
Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h2 class="chapter">4 objdump</h2>
|
|
|
|
<p><a name="index-object-file-information-67"></a><a name="index-objdump-68"></a>
|
|
<!-- man title objdump display information from object files. -->
|
|
|
|
<pre class="smallexample"> <!-- man begin SYNOPSIS objdump -->
|
|
objdump [<samp><span class="option">-a</span></samp>|<samp><span class="option">--archive-headers</span></samp>]
|
|
[<samp><span class="option">-b</span></samp> <var>bfdname</var>|<samp><span class="option">--target=</span><var>bfdname</var></samp>]
|
|
[<samp><span class="option">-C</span></samp>|<samp><span class="option">--demangle</span></samp>[=<var>style</var>] ]
|
|
[<samp><span class="option">-d</span></samp>|<samp><span class="option">--disassemble</span></samp>]
|
|
[<samp><span class="option">-D</span></samp>|<samp><span class="option">--disassemble-all</span></samp>]
|
|
[<samp><span class="option">-z</span></samp>|<samp><span class="option">--disassemble-zeroes</span></samp>]
|
|
[<samp><span class="option">-EB</span></samp>|<samp><span class="option">-EL</span></samp>|<samp><span class="option">--endian=</span></samp>{big | little }]
|
|
[<samp><span class="option">-f</span></samp>|<samp><span class="option">--file-headers</span></samp>]
|
|
[<samp><span class="option">-F</span></samp>|<samp><span class="option">--file-offsets</span></samp>]
|
|
[<samp><span class="option">--file-start-context</span></samp>]
|
|
[<samp><span class="option">-g</span></samp>|<samp><span class="option">--debugging</span></samp>]
|
|
[<samp><span class="option">-e</span></samp>|<samp><span class="option">--debugging-tags</span></samp>]
|
|
[<samp><span class="option">-h</span></samp>|<samp><span class="option">--section-headers</span></samp>|<samp><span class="option">--headers</span></samp>]
|
|
[<samp><span class="option">-i</span></samp>|<samp><span class="option">--info</span></samp>]
|
|
[<samp><span class="option">-j</span></samp> <var>section</var>|<samp><span class="option">--section=</span></samp><var>section</var>]
|
|
[<samp><span class="option">-l</span></samp>|<samp><span class="option">--line-numbers</span></samp>]
|
|
[<samp><span class="option">-S</span></samp>|<samp><span class="option">--source</span></samp>]
|
|
[<samp><span class="option">-m</span></samp> <var>machine</var>|<samp><span class="option">--architecture=</span></samp><var>machine</var>]
|
|
[<samp><span class="option">-M</span></samp> <var>options</var>|<samp><span class="option">--disassembler-options=</span></samp><var>options</var>]
|
|
[<samp><span class="option">-p</span></samp>|<samp><span class="option">--private-headers</span></samp>]
|
|
[<samp><span class="option">-P</span></samp> <var>options</var>|<samp><span class="option">--private=</span></samp><var>options</var>]
|
|
[<samp><span class="option">-r</span></samp>|<samp><span class="option">--reloc</span></samp>]
|
|
[<samp><span class="option">-R</span></samp>|<samp><span class="option">--dynamic-reloc</span></samp>]
|
|
[<samp><span class="option">-s</span></samp>|<samp><span class="option">--full-contents</span></samp>]
|
|
[<samp><span class="option">-W[lLiaprmfFsoRt]</span></samp>|
|
|
<samp><span class="option">--dwarf</span></samp>[=rawline,=decodedline,=info,=abbrev,=pubnames]
|
|
[=aranges,=macro,=frames,=frames-interp,=str,=loc]
|
|
[=Ranges,=pubtypes,=trace_info,=trace_abbrev]
|
|
[=trace_aranges,=gdb_index]
|
|
[<samp><span class="option">-G</span></samp>|<samp><span class="option">--stabs</span></samp>]
|
|
[<samp><span class="option">-t</span></samp>|<samp><span class="option">--syms</span></samp>]
|
|
[<samp><span class="option">-T</span></samp>|<samp><span class="option">--dynamic-syms</span></samp>]
|
|
[<samp><span class="option">-x</span></samp>|<samp><span class="option">--all-headers</span></samp>]
|
|
[<samp><span class="option">-w</span></samp>|<samp><span class="option">--wide</span></samp>]
|
|
[<samp><span class="option">--start-address=</span></samp><var>address</var>]
|
|
[<samp><span class="option">--stop-address=</span></samp><var>address</var>]
|
|
[<samp><span class="option">--prefix-addresses</span></samp>]
|
|
[<samp><span class="option">--[no-]show-raw-insn</span></samp>]
|
|
[<samp><span class="option">--adjust-vma=</span></samp><var>offset</var>]
|
|
[<samp><span class="option">--special-syms</span></samp>]
|
|
[<samp><span class="option">--prefix=</span></samp><var>prefix</var>]
|
|
[<samp><span class="option">--prefix-strip=</span></samp><var>level</var>]
|
|
[<samp><span class="option">--insn-width=</span></samp><var>width</var>]
|
|
[<samp><span class="option">-V</span></samp>|<samp><span class="option">--version</span></samp>]
|
|
[<samp><span class="option">-H</span></samp>|<samp><span class="option">--help</span></samp>]
|
|
<var>objfile</var>...
|
|
<!-- man end -->
|
|
</pre>
|
|
<!-- man begin DESCRIPTION objdump -->
|
|
<p><samp><span class="command">objdump</span></samp> displays information about one or more object files.
|
|
The options control what particular information to display. This
|
|
information is mostly useful to programmers who are working on the
|
|
compilation tools, as opposed to programmers who just want their
|
|
program to compile and work.
|
|
|
|
<p><var>objfile</var><small class="dots">...</small> are the object files to be examined. When you
|
|
specify archives, <samp><span class="command">objdump</span></samp> shows information on each of the member
|
|
object files.
|
|
|
|
<!-- man end -->
|
|
<!-- man begin OPTIONS objdump -->
|
|
<p>The long and short forms of options, shown here as alternatives, are
|
|
equivalent. At least one option from the list
|
|
<samp><span class="option">-a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-P,-r,-R,-s,-S,-t,-T,-V,-x</span></samp> must be given.
|
|
|
|
<dl>
|
|
<dt><samp><span class="env">-a</span></samp><dt><samp><span class="env">--archive-header</span></samp><dd><a name="index-archive-headers-69"></a>If any of the <var>objfile</var> files are archives, display the archive
|
|
header information (in a format similar to ‘<samp><span class="samp">ls -l</span></samp>’). Besides the
|
|
information you could list with ‘<samp><span class="samp">ar tv</span></samp>’, ‘<samp><span class="samp">objdump -a</span></samp>’ shows
|
|
the object file format of each archive member.
|
|
|
|
<br><dt><samp><span class="env">--adjust-vma=</span><var>offset</var></samp><dd><a name="index-section-addresses-in-objdump-70"></a><a name="index-VMA-in-objdump-71"></a>When dumping information, first add <var>offset</var> to all the section
|
|
addresses. This is useful if the section addresses do not correspond to
|
|
the symbol table, which can happen when putting sections at particular
|
|
addresses when using a format which can not represent section addresses,
|
|
such as a.out.
|
|
|
|
<br><dt><samp><span class="env">-b </span><var>bfdname</var></samp><dt><samp><span class="env">--target=</span><var>bfdname</var></samp><dd><a name="index-object-code-format-72"></a>Specify that the object-code format for the object files is
|
|
<var>bfdname</var>. This option may not be necessary; <var>objdump</var> can
|
|
automatically recognize many formats.
|
|
|
|
<p>For example,
|
|
<pre class="example"> objdump -b oasys -m vax -h fu.o
|
|
</pre>
|
|
<p class="noindent">displays summary information from the section headers (<samp><span class="option">-h</span></samp>) of
|
|
<samp><span class="file">fu.o</span></samp>, which is explicitly identified (<samp><span class="option">-m</span></samp>) as a VAX object
|
|
file in the format produced by Oasys compilers. You can list the
|
|
formats available with the <samp><span class="option">-i</span></samp> option.
|
|
See <a href="Target-Selection.html#Target-Selection">Target Selection</a>, for more information.
|
|
|
|
<br><dt><samp><span class="env">-C</span></samp><dt><samp><span class="env">--demangle[=</span><var>style</var><span class="env">]</span></samp><dd><a name="index-demangling-in-objdump-73"></a>Decode (<dfn>demangle</dfn>) low-level symbol names into user-level names.
|
|
Besides removing any initial underscore prepended by the system, this
|
|
makes C++ function names readable. Different compilers have different
|
|
mangling styles. The optional demangling style argument can be used to
|
|
choose an appropriate demangling style for your compiler. See <a href="c_002b_002bfilt.html#c_002b_002bfilt">c++filt</a>,
|
|
for more information on demangling.
|
|
|
|
<br><dt><samp><span class="env">-g</span></samp><dt><samp><span class="env">--debugging</span></samp><dd>Display debugging information. This attempts to parse STABS and IEEE
|
|
debugging format information stored in the file and print it out using
|
|
a C like syntax. If neither of these formats are found this option
|
|
falls back on the <samp><span class="option">-W</span></samp> option to print any DWARF information in
|
|
the file.
|
|
|
|
<br><dt><samp><span class="env">-e</span></samp><dt><samp><span class="env">--debugging-tags</span></samp><dd>Like <samp><span class="option">-g</span></samp>, but the information is generated in a format compatible
|
|
with ctags tool.
|
|
|
|
<br><dt><samp><span class="env">-d</span></samp><dt><samp><span class="env">--disassemble</span></samp><dd><a name="index-disassembling-object-code-74"></a><a name="index-machine-instructions-75"></a>Display the assembler mnemonics for the machine instructions from
|
|
<var>objfile</var>. This option only disassembles those sections which are
|
|
expected to contain instructions.
|
|
|
|
<br><dt><samp><span class="env">-D</span></samp><dt><samp><span class="env">--disassemble-all</span></samp><dd>Like <samp><span class="option">-d</span></samp>, but disassemble the contents of all sections, not just
|
|
those expected to contain instructions.
|
|
|
|
<p>This option also has a subtle effect on the disassembly of
|
|
instructions in code sections. When option <samp><span class="option">-d</span></samp> is in effect
|
|
objdump will assume that any symbols present in a code section occur
|
|
on the boundary between instructions and it will refuse to disassemble
|
|
across such a boundary. When option <samp><span class="option">-D</span></samp> is in effect however
|
|
this assumption is supressed. This means that it is possible for the
|
|
output of <samp><span class="option">-d</span></samp> and <samp><span class="option">-D</span></samp> to differ if, for example, data
|
|
is stored in code sections.
|
|
|
|
<p>If the target is an ARM architecture this switch also has the effect
|
|
of forcing the disassembler to decode pieces of data found in code
|
|
sections as if they were instructions.
|
|
|
|
<br><dt><samp><span class="env">--prefix-addresses</span></samp><dd>When disassembling, print the complete address on each line. This is
|
|
the older disassembly format.
|
|
|
|
<br><dt><samp><span class="env">-EB</span></samp><dt><samp><span class="env">-EL</span></samp><dt><samp><span class="env">--endian={big|little}</span></samp><dd><a name="index-endianness-76"></a><a name="index-disassembly-endianness-77"></a>Specify the endianness of the object files. This only affects
|
|
disassembly. This can be useful when disassembling a file format which
|
|
does not describe endianness information, such as S-records.
|
|
|
|
<br><dt><samp><span class="env">-f</span></samp><dt><samp><span class="env">--file-headers</span></samp><dd><a name="index-object-file-header-78"></a>Display summary information from the overall header of
|
|
each of the <var>objfile</var> files.
|
|
|
|
<br><dt><samp><span class="env">-F</span></samp><dt><samp><span class="env">--file-offsets</span></samp><dd><a name="index-object-file-offsets-79"></a>When disassembling sections, whenever a symbol is displayed, also
|
|
display the file offset of the region of data that is about to be
|
|
dumped. If zeroes are being skipped, then when disassembly resumes,
|
|
tell the user how many zeroes were skipped and the file offset of the
|
|
location from where the disassembly resumes. When dumping sections,
|
|
display the file offset of the location from where the dump starts.
|
|
|
|
<br><dt><samp><span class="env">--file-start-context</span></samp><dd><a name="index-source-code-context-80"></a>Specify that when displaying interlisted source code/disassembly
|
|
(assumes <samp><span class="option">-S</span></samp>) from a file that has not yet been displayed, extend the
|
|
context to the start of the file.
|
|
|
|
<br><dt><samp><span class="env">-h</span></samp><dt><samp><span class="env">--section-headers</span></samp><dt><samp><span class="env">--headers</span></samp><dd><a name="index-section-headers-81"></a>Display summary information from the section headers of the
|
|
object file.
|
|
|
|
<p>File segments may be relocated to nonstandard addresses, for example by
|
|
using the <samp><span class="option">-Ttext</span></samp>, <samp><span class="option">-Tdata</span></samp>, or <samp><span class="option">-Tbss</span></samp> options to
|
|
<samp><span class="command">ld</span></samp>. However, some object file formats, such as a.out, do not
|
|
store the starting address of the file segments. In those situations,
|
|
although <samp><span class="command">ld</span></samp> relocates the sections correctly, using ‘<samp><span class="samp">objdump
|
|
-h</span></samp>’ to list the file section headers cannot show the correct addresses.
|
|
Instead, it shows the usual addresses, which are implicit for the
|
|
target.
|
|
|
|
<br><dt><samp><span class="env">-H</span></samp><dt><samp><span class="env">--help</span></samp><dd>Print a summary of the options to <samp><span class="command">objdump</span></samp> and exit.
|
|
|
|
<br><dt><samp><span class="env">-i</span></samp><dt><samp><span class="env">--info</span></samp><dd><a name="index-architectures-available-82"></a><a name="index-object-formats-available-83"></a>Display a list showing all architectures and object formats available
|
|
for specification with <samp><span class="option">-b</span></samp> or <samp><span class="option">-m</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">-j </span><var>name</var></samp><dt><samp><span class="env">--section=</span><var>name</var></samp><dd><a name="index-section-information-84"></a>Display information only for section <var>name</var>.
|
|
|
|
<br><dt><samp><span class="env">-l</span></samp><dt><samp><span class="env">--line-numbers</span></samp><dd><a name="index-source-filenames-for-object-files-85"></a>Label the display (using debugging information) with the filename and
|
|
source line numbers corresponding to the object code or relocs shown.
|
|
Only useful with <samp><span class="option">-d</span></samp>, <samp><span class="option">-D</span></samp>, or <samp><span class="option">-r</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">-m </span><var>machine</var></samp><dt><samp><span class="env">--architecture=</span><var>machine</var></samp><dd><a name="index-architecture-86"></a><a name="index-disassembly-architecture-87"></a>Specify the architecture to use when disassembling object files. This
|
|
can be useful when disassembling object files which do not describe
|
|
architecture information, such as S-records. You can list the available
|
|
architectures with the <samp><span class="option">-i</span></samp> option.
|
|
|
|
<p>If the target is an ARM architecture then this switch has an
|
|
additional effect. It restricts the disassembly to only those
|
|
instructions supported by the architecture specified by <var>machine</var>.
|
|
If it is necessary to use this switch because the input file does not
|
|
contain any architecture information, but it is also desired to
|
|
disassemble all the instructions use <samp><span class="option">-marm</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">-M </span><var>options</var></samp><dt><samp><span class="env">--disassembler-options=</span><var>options</var></samp><dd>Pass target specific information to the disassembler. Only supported on
|
|
some targets. If it is necessary to specify more than one
|
|
disassembler option then multiple <samp><span class="option">-M</span></samp> options can be used or
|
|
can be placed together into a comma separated list.
|
|
|
|
<p>If the target is an ARM architecture then this switch can be used to
|
|
select which register name set is used during disassembler. Specifying
|
|
<samp><span class="option">-M reg-names-std</span></samp> (the default) will select the register names as
|
|
used in ARM's instruction set documentation, but with register 13 called
|
|
'sp', register 14 called 'lr' and register 15 called 'pc'. Specifying
|
|
<samp><span class="option">-M reg-names-apcs</span></samp> will select the name set used by the ARM
|
|
Procedure Call Standard, whilst specifying <samp><span class="option">-M reg-names-raw</span></samp> will
|
|
just use ‘<samp><span class="samp">r</span></samp>’ followed by the register number.
|
|
|
|
<p>There are also two variants on the APCS register naming scheme enabled
|
|
by <samp><span class="option">-M reg-names-atpcs</span></samp> and <samp><span class="option">-M reg-names-special-atpcs</span></samp> which
|
|
use the ARM/Thumb Procedure Call Standard naming conventions. (Either
|
|
with the normal register names or the special register names).
|
|
|
|
<p>This option can also be used for ARM architectures to force the
|
|
disassembler to interpret all instructions as Thumb instructions by
|
|
using the switch <samp><span class="option">--disassembler-options=force-thumb</span></samp>. This can be
|
|
useful when attempting to disassemble thumb code produced by other
|
|
compilers.
|
|
|
|
<p>For the x86, some of the options duplicate functions of the <samp><span class="option">-m</span></samp>
|
|
switch, but allow finer grained control. Multiple selections from the
|
|
following may be specified as a comma separated string.
|
|
<dl>
|
|
<dt><code>x86-64</code><dt><code>i386</code><dt><code>i8086</code><dd>Select disassembly for the given architecture.
|
|
|
|
<br><dt><code>intel</code><dt><code>att</code><dd>Select between intel syntax mode and AT&T syntax mode.
|
|
|
|
<br><dt><code>amd64</code><dt><code>intel64</code><dd>Select between AMD64 ISA and Intel64 ISA.
|
|
|
|
<br><dt><code>intel-mnemonic</code><dt><code>att-mnemonic</code><dd>Select between intel mnemonic mode and AT&T mnemonic mode.
|
|
Note: <code>intel-mnemonic</code> implies <code>intel</code> and
|
|
<code>att-mnemonic</code> implies <code>att</code>.
|
|
|
|
<br><dt><code>addr64</code><dt><code>addr32</code><dt><code>addr16</code><dt><code>data32</code><dt><code>data16</code><dd>Specify the default address size and operand size. These four options
|
|
will be overridden if <code>x86-64</code>, <code>i386</code> or <code>i8086</code>
|
|
appear later in the option string.
|
|
|
|
<br><dt><code>suffix</code><dd>When in AT&T mode, instructs the disassembler to print a mnemonic
|
|
suffix even when the suffix could be inferred by the operands.
|
|
</dl>
|
|
|
|
<p>For PowerPC, <samp><span class="option">booke</span></samp> controls the disassembly of BookE
|
|
instructions. <samp><span class="option">32</span></samp> and <samp><span class="option">64</span></samp> select PowerPC and
|
|
PowerPC64 disassembly, respectively. <samp><span class="option">e300</span></samp> selects
|
|
disassembly for the e300 family. <samp><span class="option">440</span></samp> selects disassembly for
|
|
the PowerPC 440. <samp><span class="option">ppcps</span></samp> selects disassembly for the paired
|
|
single instructions of the PPC750CL.
|
|
|
|
<p>For MIPS, this option controls the printing of instruction mnemonic
|
|
names and register names in disassembled instructions. Multiple
|
|
selections from the following may be specified as a comma separated
|
|
string, and invalid options are ignored:
|
|
|
|
<dl>
|
|
<dt><code>no-aliases</code><dd>Print the 'raw' instruction mnemonic instead of some pseudo
|
|
instruction mnemonic. I.e., print 'daddu' or 'or' instead of 'move',
|
|
'sll' instead of 'nop', etc.
|
|
|
|
<br><dt><code>msa</code><dd>Disassemble MSA instructions.
|
|
|
|
<br><dt><code>virt</code><dd>Disassemble the virtualization ASE instructions.
|
|
|
|
<br><dt><code>xpa</code><dd>Disassemble the eXtended Physical Address (XPA) ASE instructions.
|
|
|
|
<br><dt><code>gpr-names=</code><var>ABI</var><dd>Print GPR (general-purpose register) names as appropriate
|
|
for the specified ABI. By default, GPR names are selected according to
|
|
the ABI of the binary being disassembled.
|
|
|
|
<br><dt><code>fpr-names=</code><var>ABI</var><dd>Print FPR (floating-point register) names as
|
|
appropriate for the specified ABI. By default, FPR numbers are printed
|
|
rather than names.
|
|
|
|
<br><dt><code>cp0-names=</code><var>ARCH</var><dd>Print CP0 (system control coprocessor; coprocessor 0) register names
|
|
as appropriate for the CPU or architecture specified by
|
|
<var>ARCH</var>. By default, CP0 register names are selected according to
|
|
the architecture and CPU of the binary being disassembled.
|
|
|
|
<br><dt><code>hwr-names=</code><var>ARCH</var><dd>Print HWR (hardware register, used by the <code>rdhwr</code> instruction) names
|
|
as appropriate for the CPU or architecture specified by
|
|
<var>ARCH</var>. By default, HWR names are selected according to
|
|
the architecture and CPU of the binary being disassembled.
|
|
|
|
<br><dt><code>reg-names=</code><var>ABI</var><dd>Print GPR and FPR names as appropriate for the selected ABI.
|
|
|
|
<br><dt><code>reg-names=</code><var>ARCH</var><dd>Print CPU-specific register names (CP0 register and HWR names)
|
|
as appropriate for the selected CPU or architecture.
|
|
</dl>
|
|
|
|
<p>For any of the options listed above, <var>ABI</var> or
|
|
<var>ARCH</var> may be specified as ‘<samp><span class="samp">numeric</span></samp>’ to have numbers printed
|
|
rather than names, for the selected types of registers.
|
|
You can list the available values of <var>ABI</var> and <var>ARCH</var> using
|
|
the <samp><span class="option">--help</span></samp> option.
|
|
|
|
<p>For VAX, you can specify function entry addresses with <samp><span class="option">-M
|
|
entry:0xf00ba</span></samp>. You can use this multiple times to properly
|
|
disassemble VAX binary files that don't contain symbol tables (like
|
|
ROM dumps). In these cases, the function entry mask would otherwise
|
|
be decoded as VAX instructions, which would probably lead the rest
|
|
of the function being wrongly disassembled.
|
|
|
|
<br><dt><samp><span class="env">-p</span></samp><dt><samp><span class="env">--private-headers</span></samp><dd>Print information that is specific to the object file format. The exact
|
|
information printed depends upon the object file format. For some
|
|
object file formats, no additional information is printed.
|
|
|
|
<br><dt><samp><span class="env">-P </span><var>options</var></samp><dt><samp><span class="env">--private=</span><var>options</var></samp><dd>Print information that is specific to the object file format. The
|
|
argument <var>options</var> is a comma separated list that depends on the
|
|
format (the lists of options is displayed with the help).
|
|
|
|
<p>For XCOFF, the available options are:
|
|
<dl>
|
|
<dt><code>header</code><br><dt><code>aout</code><br><dt><code>sections</code><br><dt><code>syms</code><br><dt><code>relocs</code><br><dt><code>lineno,</code><br><dt><code>loader</code><br><dt><code>except</code><br><dt><code>typchk</code><br><dt><code>traceback</code><br><dt><code>toc</code><br><dt><code>ldinfo</code><dd></dl>
|
|
|
|
<p>Not all object formats support this option. In particular the ELF
|
|
format does not use it.
|
|
|
|
<br><dt><samp><span class="env">-r</span></samp><dt><samp><span class="env">--reloc</span></samp><dd><a name="index-relocation-entries_002c-in-object-file-88"></a>Print the relocation entries of the file. If used with <samp><span class="option">-d</span></samp> or
|
|
<samp><span class="option">-D</span></samp>, the relocations are printed interspersed with the
|
|
disassembly.
|
|
|
|
<br><dt><samp><span class="env">-R</span></samp><dt><samp><span class="env">--dynamic-reloc</span></samp><dd><a name="index-dynamic-relocation-entries_002c-in-object-file-89"></a>Print the dynamic relocation entries of the file. This is only
|
|
meaningful for dynamic objects, such as certain types of shared
|
|
libraries. As for <samp><span class="option">-r</span></samp>, if used with <samp><span class="option">-d</span></samp> or
|
|
<samp><span class="option">-D</span></samp>, the relocations are printed interspersed with the
|
|
disassembly.
|
|
|
|
<br><dt><samp><span class="env">-s</span></samp><dt><samp><span class="env">--full-contents</span></samp><dd><a name="index-sections_002c-full-contents-90"></a><a name="index-object-file-sections-91"></a>Display the full contents of any sections requested. By default all
|
|
non-empty sections are displayed.
|
|
|
|
<br><dt><samp><span class="env">-S</span></samp><dt><samp><span class="env">--source</span></samp><dd><a name="index-source-disassembly-92"></a><a name="index-disassembly_002c-with-source-93"></a>Display source code intermixed with disassembly, if possible. Implies
|
|
<samp><span class="option">-d</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">--prefix=</span><var>prefix</var></samp><dd><a name="index-Add-prefix-to-absolute-paths-94"></a>Specify <var>prefix</var> to add to the absolute paths when used with
|
|
<samp><span class="option">-S</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">--prefix-strip=</span><var>level</var></samp><dd><a name="index-Strip-absolute-paths-95"></a>Indicate how many initial directory names to strip off the hardwired
|
|
absolute paths. It has no effect without <samp><span class="option">--prefix=</span></samp><var>prefix</var>.
|
|
|
|
<br><dt><samp><span class="env">--show-raw-insn</span></samp><dd>When disassembling instructions, print the instruction in hex as well as
|
|
in symbolic form. This is the default except when
|
|
<samp><span class="option">--prefix-addresses</span></samp> is used.
|
|
|
|
<br><dt><samp><span class="env">--no-show-raw-insn</span></samp><dd>When disassembling instructions, do not print the instruction bytes.
|
|
This is the default when <samp><span class="option">--prefix-addresses</span></samp> is used.
|
|
|
|
<br><dt><samp><span class="env">--insn-width=</span><var>width</var></samp><dd><a name="index-Instruction-width-96"></a>Display <var>width</var> bytes on a single line when disassembling
|
|
instructions.
|
|
|
|
<br><dt><samp><span class="env">-W[lLiaprmfFsoRt]</span></samp><dt><samp><span class="env">--dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames]</span></samp><dt><samp><span class="env">--dwarf[=aranges,=macro,=frames,=frames-interp,=str,=loc]</span></samp><dt><samp><span class="env">--dwarf[=Ranges,=pubtypes,=trace_info,=trace_abbrev]</span></samp><dt><samp><span class="env">--dwarf[=trace_aranges,=gdb_index]</span></samp><dd><a name="index-DWARF-97"></a><a name="index-debug-symbols-98"></a>Displays the contents of the debug sections in the file, if any are
|
|
present. If one of the optional letters or words follows the switch
|
|
then only data found in those specific sections will be dumped.
|
|
|
|
<p>Note that there is no single letter option to display the content of
|
|
trace sections or .gdb_index.
|
|
|
|
<p>Note: the output from the <samp><span class="option">=info</span></samp> option can also be affected
|
|
by the options <samp><span class="option">--dwarf-depth</span></samp>, the <samp><span class="option">--dwarf-start</span></samp> and
|
|
the <samp><span class="option">--dwarf-check</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">--dwarf-depth=</span><var>n</var></samp><dd>Limit the dump of the <code>.debug_info</code> section to <var>n</var> children.
|
|
This is only useful with <samp><span class="option">--dwarf=info</span></samp>. The default is
|
|
to print all DIEs; the special value 0 for <var>n</var> will also have this
|
|
effect.
|
|
|
|
<p>With a non-zero value for <var>n</var>, DIEs at or deeper than <var>n</var>
|
|
levels will not be printed. The range for <var>n</var> is zero-based.
|
|
|
|
<br><dt><samp><span class="env">--dwarf-start=</span><var>n</var></samp><dd>Print only DIEs beginning with the DIE numbered <var>n</var>. This is only
|
|
useful with <samp><span class="option">--dwarf=info</span></samp>.
|
|
|
|
<p>If specified, this option will suppress printing of any header
|
|
information and all DIEs before the DIE numbered <var>n</var>. Only
|
|
siblings and children of the specified DIE will be printed.
|
|
|
|
<p>This can be used in conjunction with <samp><span class="option">--dwarf-depth</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">--dwarf-check</span></samp><dd>Enable additional checks for consistency of Dwarf information.
|
|
|
|
<br><dt><samp><span class="env">-G</span></samp><dt><samp><span class="env">--stabs</span></samp><dd><a name="index-stab-99"></a><a name="index-g_t_002estab-100"></a><a name="index-debug-symbols-101"></a><a name="index-ELF-object-file-format-102"></a>Display the full contents of any sections requested. Display the
|
|
contents of the .stab and .stab.index and .stab.excl sections from an
|
|
ELF file. This is only useful on systems (such as Solaris 2.0) in which
|
|
<code>.stab</code> debugging symbol-table entries are carried in an ELF
|
|
section. In most other file formats, debugging symbol-table entries are
|
|
interleaved with linkage symbols, and are visible in the <samp><span class="option">--syms</span></samp>
|
|
output.
|
|
|
|
<br><dt><samp><span class="env">--start-address=</span><var>address</var></samp><dd><a name="index-start_002daddress-103"></a>Start displaying data at the specified address. This affects the output
|
|
of the <samp><span class="option">-d</span></samp>, <samp><span class="option">-r</span></samp> and <samp><span class="option">-s</span></samp> options.
|
|
|
|
<br><dt><samp><span class="env">--stop-address=</span><var>address</var></samp><dd><a name="index-stop_002daddress-104"></a>Stop displaying data at the specified address. This affects the output
|
|
of the <samp><span class="option">-d</span></samp>, <samp><span class="option">-r</span></samp> and <samp><span class="option">-s</span></samp> options.
|
|
|
|
<br><dt><samp><span class="env">-t</span></samp><dt><samp><span class="env">--syms</span></samp><dd><a name="index-symbol-table-entries_002c-printing-105"></a>Print the symbol table entries of the file.
|
|
This is similar to the information provided by the ‘<samp><span class="samp">nm</span></samp>’ program,
|
|
although the display format is different. The format of the output
|
|
depends upon the format of the file being dumped, but there are two main
|
|
types. One looks like this:
|
|
|
|
<pre class="smallexample"> [ 4](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .bss
|
|
[ 6](sec 1)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 fred
|
|
</pre>
|
|
<p>where the number inside the square brackets is the number of the entry
|
|
in the symbol table, the <var>sec</var> number is the section number, the
|
|
<var>fl</var> value are the symbol's flag bits, the <var>ty</var> number is the
|
|
symbol's type, the <var>scl</var> number is the symbol's storage class and
|
|
the <var>nx</var> value is the number of auxilary entries associated with
|
|
the symbol. The last two fields are the symbol's value and its name.
|
|
|
|
<p>The other common output format, usually seen with ELF based files,
|
|
looks like this:
|
|
|
|
<pre class="smallexample"> 00000000 l d .bss 00000000 .bss
|
|
00000000 g .text 00000000 fred
|
|
</pre>
|
|
<p>Here the first number is the symbol's value (sometimes refered to as
|
|
its address). The next field is actually a set of characters and
|
|
spaces indicating the flag bits that are set on the symbol. These
|
|
characters are described below. Next is the section with which the
|
|
symbol is associated or <em>*ABS*</em> if the section is absolute (ie
|
|
not connected with any section), or <em>*UND*</em> if the section is
|
|
referenced in the file being dumped, but not defined there.
|
|
|
|
<p>After the section name comes another field, a number, which for common
|
|
symbols is the alignment and for other symbol is the size. Finally
|
|
the symbol's name is displayed.
|
|
|
|
<p>The flag characters are divided into 7 groups as follows:
|
|
<dl>
|
|
<dt><code>l</code><dt><code>g</code><dt><code>u</code><dt><code>!</code><dd>The symbol is a local (l), global (g), unique global (u), neither
|
|
global nor local (a space) or both global and local (!). A
|
|
symbol can be neither local or global for a variety of reasons, e.g.,
|
|
because it is used for debugging, but it is probably an indication of
|
|
a bug if it is ever both local and global. Unique global symbols are
|
|
a GNU extension to the standard set of ELF symbol bindings. For such
|
|
a symbol the dynamic linker will make sure that in the entire process
|
|
there is just one symbol with this name and type in use.
|
|
|
|
<br><dt><code>w</code><dd>The symbol is weak (w) or strong (a space).
|
|
|
|
<br><dt><code>C</code><dd>The symbol denotes a constructor (C) or an ordinary symbol (a space).
|
|
|
|
<br><dt><code>W</code><dd>The symbol is a warning (W) or a normal symbol (a space). A warning
|
|
symbol's name is a message to be displayed if the symbol following the
|
|
warning symbol is ever referenced.
|
|
|
|
<br><dt><code>I</code><br><dt><code>i</code><dd>The symbol is an indirect reference to another symbol (I), a function
|
|
to be evaluated during reloc processing (i) or a normal symbol (a
|
|
space).
|
|
|
|
<br><dt><code>d</code><dt><code>D</code><dd>The symbol is a debugging symbol (d) or a dynamic symbol (D) or a
|
|
normal symbol (a space).
|
|
|
|
<br><dt><code>F</code><br><dt><code>f</code><br><dt><code>O</code><dd>The symbol is the name of a function (F) or a file (f) or an object
|
|
(O) or just a normal symbol (a space).
|
|
</dl>
|
|
|
|
<br><dt><samp><span class="env">-T</span></samp><dt><samp><span class="env">--dynamic-syms</span></samp><dd><a name="index-dynamic-symbol-table-entries_002c-printing-106"></a>Print the dynamic symbol table entries of the file. This is only
|
|
meaningful for dynamic objects, such as certain types of shared
|
|
libraries. This is similar to the information provided by the ‘<samp><span class="samp">nm</span></samp>’
|
|
program when given the <samp><span class="option">-D</span></samp> (<samp><span class="option">--dynamic</span></samp>) option.
|
|
|
|
<br><dt><samp><span class="env">--special-syms</span></samp><dd>When displaying symbols include those which the target considers to be
|
|
special in some way and which would not normally be of interest to the
|
|
user.
|
|
|
|
<br><dt><samp><span class="env">-V</span></samp><dt><samp><span class="env">--version</span></samp><dd>Print the version number of <samp><span class="command">objdump</span></samp> and exit.
|
|
|
|
<br><dt><samp><span class="env">-x</span></samp><dt><samp><span class="env">--all-headers</span></samp><dd><a name="index-all-header-information_002c-object-file-107"></a><a name="index-header-information_002c-all-108"></a>Display all available header information, including the symbol table and
|
|
relocation entries. Using <samp><span class="option">-x</span></samp> is equivalent to specifying all of
|
|
<samp><span class="option">-a -f -h -p -r -t</span></samp>.
|
|
|
|
<br><dt><samp><span class="env">-w</span></samp><dt><samp><span class="env">--wide</span></samp><dd><a name="index-wide-output_002c-printing-109"></a>Format some lines for output devices that have more than 80 columns.
|
|
Also do not truncate symbol names when they are displayed.
|
|
|
|
<br><dt><samp><span class="env">-z</span></samp><dt><samp><span class="env">--disassemble-zeroes</span></samp><dd>Normally the disassembly output will skip blocks of zeroes. This
|
|
option directs the disassembler to disassemble those blocks, just like
|
|
any other data.
|
|
</dl>
|
|
|
|
<!-- man end -->
|
|
</body></html>
|
|
|