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.TH "LLVM-OBJDUMP" "1" "2021-06-07" "12" "LLVM"
.SH NAME
llvm-objdump \- LLVM's object file dumper
.SH SYNOPSIS
.sp
\fBllvm\-objdump\fP [\fIcommands\fP] [\fIoptions\fP] [\fIfilenames...\fP]
.SH DESCRIPTION
.sp
The \fBllvm\-objdump\fP utility prints the contents of object files and
final linked images named on the command line. If no file name is specified,
\fBllvm\-objdump\fP will attempt to read from \fIa.out\fP\&. If \fI\-\fP is used as a
file name, \fBllvm\-objdump\fP will process a file on its standard input
stream.
.SH COMMANDS
.sp
At least one of the following commands are required, and some commands can be
combined with other commands:
.INDENT 0.0
.TP
.B \-a, \-\-archive\-headers
Display the information contained within an archive\(aqs headers.
.UNINDENT
.INDENT 0.0
.TP
.B \-d, \-\-disassemble
Disassemble all text sections found in the input files.
.UNINDENT
.INDENT 0.0
.TP
.B \-D, \-\-disassemble\-all
Disassemble all sections found in the input files.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-disassemble\-symbols=<symbol1[,symbol2,...]>
Disassemble only the specified symbols. Takes demangled symbol names when
\fI\%\-\-demangle\fP is specified, otherwise takes mangled symbol names.
Implies \fI\%\-\-disassemble\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-dwarf=<value>
Dump the specified DWARF debug sections. The supported values are:
.sp
\fIframes\fP \- .debug_frame
.UNINDENT
.INDENT 0.0
.TP
.B \-f, \-\-file\-headers
Display the contents of the overall file header.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-fault\-map\-section
Display the content of the fault map section.
.UNINDENT
.INDENT 0.0
.TP
.B \-h, \-\-headers, \-\-section\-headers
Display summaries of the headers for each section.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-help
Display usage information and exit. Does not stack with other commands.
.UNINDENT
.INDENT 0.0
.TP
.B \-p, \-\-private\-headers
Display format\-specific file headers.
.UNINDENT
.INDENT 0.0
.TP
.B \-r, \-\-reloc
Display the relocation entries in the file.
.UNINDENT
.INDENT 0.0
.TP
.B \-R, \-\-dynamic\-reloc
Display the dynamic relocation entries in the file.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-raw\-clang\-ast
Dump the raw binary contents of the clang AST section.
.UNINDENT
.INDENT 0.0
.TP
.B \-s, \-\-full\-contents
Display the contents of each section.
.UNINDENT
.INDENT 0.0
.TP
.B \-t, \-\-syms
Display the symbol table.
.UNINDENT
.INDENT 0.0
.TP
.B \-T, \-\-dynamic\-syms
Display the contents of the dynamic symbol table.
.UNINDENT
.INDENT 0.0
.TP
.B \-u, \-\-unwind\-info
Display the unwind info of the input(s).
.UNINDENT
.INDENT 0.0
.TP
.B \-\-version
Display the version of the \fBllvm\-objdump\fP executable. Does not stack
with other commands.
.UNINDENT
.INDENT 0.0
.TP
.B \-x, \-\-all\-headers
Display all available header information. Equivalent to specifying
\fI\%\-\-archive\-headers\fP, \fI\%\-\-file\-headers\fP,
\fI\%\-\-private\-headers\fP, \fI\%\-\-reloc\fP, \fI\%\-\-section\-headers\fP,
and \fI\%\-\-syms\fP\&.
.UNINDENT
.SH OPTIONS
.sp
\fBllvm\-objdump\fP supports the following options:
.INDENT 0.0
.TP
.B \-\-adjust\-vma=<offset>
Increase the displayed address in disassembly or section header printing by
the specified offset.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-arch\-name=<string>
Specify the target architecture when disassembling. Use \fI\%\-\-version\fP
for a list of available targets.
.UNINDENT
.INDENT 0.0
.TP
.B \-C, \-\-demangle
Demangle symbol names in the output.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-debug\-vars=<format>
Print the locations (in registers or memory) of source\-level variables
alongside disassembly. \fBformat\fP may be \fBunicode\fP or \fBascii\fP, defaulting
to \fBunicode\fP if omitted.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-debug\-vars\-indent=<width>
Distance to indent the source\-level variable display, relative to the start
of the disassembly. Defaults to 40 characters.
.UNINDENT
.INDENT 0.0
.TP
.B \-j, \-\-section=<section1[,section2,...]>
Perform commands on the specified sections only. For Mach\-O use
\fIsegment,section\fP to specify the section name.
.UNINDENT
.INDENT 0.0
.TP
.B \-l, \-\-line\-numbers
When disassembling, display source line numbers. Implies
\fI\%\-\-disassemble\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-M, \-\-disassembler\-options=<opt1[,opt2,...]>
Pass target\-specific disassembler options. Currently supported for ARM targets
only. Available options are \fBreg\-names\-std\fP and \fBreg\-names\-raw\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-mcpu=<cpu\-name>
Target a specific CPU type for disassembly. Specify \fB\-\-mcpu=help\fP to display
available CPUs.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-mattr=<a1,+a2,\-a3,...>
Enable/disable target\-specific attributes. Specify \fB\-\-mattr=help\fP to display
the available attributes.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-no\-leading\-addr
When disassembling, do not print leading addresses.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-no\-show\-raw\-insn
When disassembling, do not print the raw bytes of each instruction.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-prefix=<prefix>
When disassembling with the \fI\%\-\-source\fP option, prepend \fBprefix\fP to
absolute paths.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-print\-imm\-hex
Use hex format when printing immediate values in disassembly output.
.UNINDENT
.INDENT 0.0
.TP
.B \-S, \-\-source
When disassembling, display source interleaved with the disassembly. Implies
\fI\%\-\-disassemble\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-show\-lma
Display the LMA column when dumping ELF section headers. Defaults to off
unless any section has different VMA and LMAs.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-start\-address=<address>
When disassembling, only disassemble from the specified address.
.sp
When printing relocations, only print the relocations patching offsets from at least \fBaddress\fP\&.
.sp
When printing symbols, only print symbols with a value of at least \fBaddress\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-stop\-address=<address>
When disassembling, only disassemble up to, but not including the specified address.
.sp
When printing relocations, only print the relocations patching offsets up to \fBaddress\fP\&.
.sp
When printing symbols, only print symbols with a value up to \fBaddress\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-symbolize\-operands
When disassembling, symbolize a branch target operand to print a label instead of a real address.
.sp
When printing a PC\-relative global symbol reference, print it as an offset from the leading symbol.
.sp
Only works with an X86 linked image.
.INDENT 7.0
.TP
.B Example:
A non\-symbolized branch instruction with a local target and pc\-relative memory access like
.UNINDENT
.INDENT 7.0
.INDENT 3.5
.sp
.nf
.ft C
cmp eax, dword ptr [rip + 4112]
jge 0x20117e <_start+0x25>
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
might become
.INDENT 7.0
.INDENT 3.5
.sp
.nf
.ft C
<L0>:
  cmp eax, dword ptr <g>
  jge      <L0>
.ft P
.fi
.UNINDENT
.UNINDENT
.UNINDENT
.INDENT 0.0
.TP
.B \-\-triple=<string>
Target triple to disassemble for, see \fB\-\-version\fP for available targets.
.UNINDENT
.INDENT 0.0
.TP
.B \-w, \-\-wide
Ignored for compatibility with GNU objdump.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-x86\-asm\-syntax=<style>
When used with \fI\%\-\-disassemble\fP, choose style of code to emit from
X86 backend. Supported values are:
.INDENT 7.0
.INDENT 3.5
.INDENT 0.0
.TP
.B att
AT&T\-style assembly
.UNINDENT
.INDENT 0.0
.TP
.B intel
Intel\-style assembly
.UNINDENT
.UNINDENT
.UNINDENT
.sp
The default disassembly style is \fBatt\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-z, \-\-disassemble\-zeroes
Do not skip blocks of zeroes when disassembling.
.UNINDENT
.INDENT 0.0
.TP
.B @<FILE>
Read command\-line options and commands from response file \fI<FILE>\fP\&.
.UNINDENT
.SH MACH-O ONLY OPTIONS AND COMMANDS
.INDENT 0.0
.TP
.B \-\-arch=<architecture>
Specify the architecture to disassemble. see \fB\-\-version\fP for available
architectures.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-archive\-member\-offsets
Print the offset to each archive member for Mach\-O archives (requires
\fI\%\-\-archive\-headers\fP).
.UNINDENT
.INDENT 0.0
.TP
.B \-\-bind
Display binding info
.UNINDENT
.INDENT 0.0
.TP
.B \-\-cfg
Create a CFG for every symbol in the object file and write it to a graphviz
file.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-data\-in\-code
Display the data in code table.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-dis\-symname=<name>
Disassemble just the specified symbol\(aqs instructions.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-dylibs\-used
Display the shared libraries used for linked files.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-dsym=<string>
Use .dSYM file for debug info.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-dylib\-id
Display the shared library\(aqs ID for dylib files.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-exports\-trie
Display exported symbols.
.UNINDENT
.INDENT 0.0
.TP
.B \-g
Print line information from debug info if available.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-full\-leading\-addr
Print the full leading address when disassembling.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-indirect\-symbols
Display the indirect symbol table.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-info\-plist
Display the info plist section as strings.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-lazy\-bind
Display lazy binding info.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-link\-opt\-hints
Display the linker optimization hints.
.UNINDENT
.INDENT 0.0
.TP
.B \-m, \-\-macho
Use Mach\-O specific object file parser. Commands and other options may behave
differently when used with \fB\-\-macho\fP\&.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-no\-leading\-headers
Do not print any leading headers.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-no\-symbolic\-operands
Do not print symbolic operands when disassembling.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-non\-verbose
Display the information for Mach\-O objects in non\-verbose or numeric form.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-objc\-meta\-data
Display the Objective\-C runtime meta data.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-private\-header
Display only the first format specific file header.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-rebase
Display rebasing information.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-universal\-headers
Display universal headers.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-weak\-bind
Display weak binding information.
.UNINDENT
.SH XCOFF ONLY OPTIONS AND COMMANDS
.INDENT 0.0
.TP
.B \-\-symbol\-description
Add symbol description to disassembly output.
.UNINDENT
.SH BUGS
.sp
To report bugs, please visit <\fI\%https://bugs.llvm.org/\fP>.
.SH SEE ALSO
.sp
\fBllvm\-nm(1)\fP, \fBllvm\-readelf(1)\fP, \fBllvm\-readobj(1)\fP
.SH AUTHOR
Maintained by the LLVM Team (https://llvm.org/).
.SH COPYRIGHT
2003-2021, LLVM Project
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