Home
Main website
Display Sidebar
Hide Ads
Recent Changes
View Source:
objdump(1)
Edit
PageHistory
Diff
Info
LikePages
OBJDUMP !!!OBJDUMP NAME SYNOPSIS DESCRIPTION OPTIONS SEE ALSO COPYRIGHT ---- !!NAME objdump - display information from object files. !!SYNOPSIS objdump [[__-a--archive-headers__] [[__-b__ ''bfdname''__--target=__''bfdname''] [[__-C--demangle__[[=''style''] ] [[__-d--disassemble__] [[__-D--disassemble-all__] [[__-z--disassemble-zeroes__] [[__-EB-EL--endian=__{big little }] [[__-f--file-headers__] [[__--file-start-context__] [[__-g--debugging__] [[__-h--section-headers--headers__] [[__-i--info__] [[__-j__ ''section''__--section=__''section''] [[__-l--line-numbers__] [[__-S--source__] [[__-m__ ''machine''__--architecture=__''machine''] [[__-M__ ''options''__--disassembler-options=__''options''] [[__-p--private-headers__] [[__-r--reloc__] [[__-R--dynamic-reloc__] [[__-s--full-contents__] [[__-G--stabs__] [[__-t--syms__] [[__-T--dynamic-syms__] [[__-x--all-headers__] [[__-w--wide__] [[__--start-address=__''address''] [[__--stop-address=__''address''] [[__--prefix-addresses__] [[__--[[no-]show-raw-insn__] [[__--adjust-vma=__''offset''] [[__-V--version__] [[__-H--help__] ''objfile''... !!DESCRIPTION __objdump__ 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. ''objfile''... are the object files to be examined. When you specify archives, __objdump__ shows information on each of the member object files. !!OPTIONS The long and short forms of options, shown here as alternatives, are equivalent. At least one option from the list __-a,-d,-D,-f,-g,-G,-h,-H,-p,-r,-R,-S,-t,-T,-V,-x__ must be given. __-a__ __--archive-header__ If any of the ''objfile'' files are archives, display the archive header information (in a format similar to __ls -l__). Besides the information you could list with __ar tv__, __objdump -a__ shows the object file format of each archive member. __--adjust-vma=__''offset'' When dumping information, first add ''offset'' 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. __-b__ ''bfdname'' __--target=__''bfdname'' Specify that the object-code format for the object files is ''bfdname''. This option may not be necessary; ''objdump'' can automatically recognize many formats. For example, objdump -b oasys -m vax -h fu.o displays summary information from the section headers (__-h__) of ''fu.o'', which is explicitly identified (__-m__) as a VAX object file in the format produced by Oasys compilers. You can list the formats available with the __-i__ option. __-C__ __--demangle[[=__''style''__]__ Decode (''demangle'') 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. __-G__ __--debugging__ Display debugging information. This attempts to parse debugging information stored in the file and print it out using a C like syntax. Only certain types of debugging information have been implemented. __-d__ __--disassemble__ Display the assembler mnemonics for the machine instructions from ''objfile''. This option only disassembles those sections which are expected to contain instructions. __-D__ __--disassemble-all__ Like __-d__, but disassemble the contents of all sections, not just those expected to contain instructions. __--prefix-addresses__ When disassembling, print the complete address on each line. This is the older disassembly format. __--disassemble-zeroes__ Normally the disassembly output will skip blocks of zeroes. This option directs the disassembler to disassemble those blocks, just like any other data. __-EB__ __-EL__ __--endian={biglittle}__ 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. __-f__ __--file-header__ Display summary information from the overall header of each of the ''objfile'' files. __--file-start-context__ Specify that when displaying interlisted source code/disassembly (assumes __-S__) from a file that has not yet been displayed, extend the context to the start of the file. __-h__ __--section-header__ __--header__ Display summary information from the section headers of the object file. File segments may be relocated to nonstandard addresses, for example by using the __-Ttext__, __-Tdata__, or __-Tbss__ options to __ld__. However, some object file formats, such as a.out, do not store the starting address of the file segments. In those situations, although __ld__ relocates the sections correctly, using __objdump -h__ to list the file section headers cannot show the correct addresses. Instead, it shows the usual addresses, which are implicit for the target. __--help__ Print a summary of the options to __objdump__ and exit. __-i__ __--info__ Display a list showing all architectures and object formats available for specification with __-b__ or __-m__. __-j__ ''name'' __--section=__''name'' Display information only for section ''name''. __-l__ __--line-numbers__ Label the display (using debugging information) with the filename and source line numbers corresponding to the object code or relocs shown. Only useful with __-d__, __-D__, or __-r__. __-m__ ''machine'' __--architecture=__''machine'' 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 __-i__ option. __-M__ ''options'' __--disassembler-options=__''options'' Pass target specific information to the disassembler. Only supported on some targets. If the target is an ARM architecture then this switch can be used to select which register name set is used during disassembler. Specifying __-M reg-name-std__ (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 __-M reg-names-apcs__ will select the name set used by the ARM Procedure Call Standard, whilst specifying __-M reg-names-raw__ will just use __r__ followed by the register number. There are also two variants on the APCS register naming scheme enabled by __-M reg-names-atpcs__ and __-M reg-names-special-atpcs__ which use the ARM/Thumb Procedure Call Standard naming conventions. (Either with the normal register name or the special register names). This option can also be used for ARM architectures to force the disassembler to interpret all instructions as Thumb instructions by using the switch __--disassembler-options=force-thumb__. This can be useful when attempting to disassemble thumb code produced by other compilers. For the x86, some of the options duplicate functions of the __-m__ switch, but allow finer grained control. Multiple selections from the following may be specified as a comma separated string. __x86-64__, __i386__ and __i8086__ select disassembly for the given architecture. __intel__ and __att__ select between intel syntax mode and AT syntax mode. __addr32__, __addr16__, __data32__ and __data16__ specify the default address size and operand size. These four options will be overridden if __x86-64__, __i386__ or __i8086__ appear later in the option string. Lastly, __suffix__, when in AT mode, instructs the dissassembler to print a mnemonic suffix even when the suffix could be inferred by the operands. For PPC , __booke__, __booke32__ and __booke64__ select disassembly of BookE instructions. __32__ and __64__ select PowerPC and PowerPC64 disassembly, respectively. __-p__ __--private-headers__ 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. __-r__ __--reloc__ Print the relocation entries of the file. If used with __-d__ or __-D__, the relocations are printed interspersed with the disassembly. __-R__ __--dynamic-reloc__ Print the dynamic relocation entries of the file. This is only meaningful for dynamic objects, such as certain types of shared libraries. __-s__ __--full-contents__ Display the full contents of any sections requested. __-S__ __--source__ Display source code intermixed with disassembly, if possible. Implies __-d__. __--show-raw-insn__ When disassembling instructions, print the instruction in hex as well as in symbolic form. This is the default except when __--prefix-addresses__ is used. __--no-show-raw-insn__ When disassembling instructions, do not print the instruction bytes. This is the default when __--prefix-addresses__ is used. __-G__ __--stabs__ 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 .stab 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 __--syms__ output. __--start-address=__''address'' Start displaying data at the specified address. This affects the output of the __-d__, __-r__ and __-s__ options. __--stop-address=__''address'' Stop displaying data at the specified address. This affects the output of the __-d__, __-r__ and __-s__ options. __-t__ __--syms__ Print the symbol table entries of the file. This is similar to the information provided by the __nm__ program. __-T__ __--dynamic-syms__ 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 __nm__ program when given the __-D__ (__--dynamic__) option. __--version__ Print the version number of __objdump__ and exit. __-x__ __--all-header__ Display all available header information, including the symbol table and relocation entries. Using __-x__ is equivalent to specifying all of __-a -f -h -r -t__. __-w__ __--wide__ Format some lines for output devices that have more than 80 columns. Also do not truncate symbol names when they are displayed. !!SEE ALSO nm(1), readelf(1), and the Info entries for ''binutils''. !!COPYRIGHT Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002 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 1.1 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''. ----
7 pages link to
objdump(1)
:
ld(1)
Man1o
nm(1)
objcopy(1)
readelf(1)
size(1)
strings(1)
This page is a man page (or other imported legacy content). We are unable to automatically determine the license status of this page.