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| .\" ======================================================================== |
| .\" |
| .IX Title "OBJDUMP 1" |
| .TH OBJDUMP 1 "2013-11-18" "binutils-2.23.91" "GNU Development Tools" |
| .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
| .\" way too many mistakes in technical documents. |
| .if n .ad l |
| .nh |
| .SH "NAME" |
| objdump \- display information from object files. |
| .SH "SYNOPSIS" |
| .IX Header "SYNOPSIS" |
| objdump [\fB\-a\fR|\fB\-\-archive\-headers\fR] |
| [\fB\-b\fR \fIbfdname\fR|\fB\-\-target=\fR\fIbfdname\fR] |
| [\fB\-C\fR|\fB\-\-demangle\fR[=\fIstyle\fR] ] |
| [\fB\-d\fR|\fB\-\-disassemble\fR] |
| [\fB\-D\fR|\fB\-\-disassemble\-all\fR] |
| [\fB\-z\fR|\fB\-\-disassemble\-zeroes\fR] |
| [\fB\-EB\fR|\fB\-EL\fR|\fB\-\-endian=\fR{big | little }] |
| [\fB\-f\fR|\fB\-\-file\-headers\fR] |
| [\fB\-F\fR|\fB\-\-file\-offsets\fR] |
| [\fB\-\-file\-start\-context\fR] |
| [\fB\-g\fR|\fB\-\-debugging\fR] |
| [\fB\-e\fR|\fB\-\-debugging\-tags\fR] |
| [\fB\-h\fR|\fB\-\-section\-headers\fR|\fB\-\-headers\fR] |
| [\fB\-i\fR|\fB\-\-info\fR] |
| [\fB\-j\fR \fIsection\fR|\fB\-\-section=\fR\fIsection\fR] |
| [\fB\-l\fR|\fB\-\-line\-numbers\fR] |
| [\fB\-S\fR|\fB\-\-source\fR] |
| [\fB\-m\fR \fImachine\fR|\fB\-\-architecture=\fR\fImachine\fR] |
| [\fB\-M\fR \fIoptions\fR|\fB\-\-disassembler\-options=\fR\fIoptions\fR] |
| [\fB\-p\fR|\fB\-\-private\-headers\fR] |
| [\fB\-P\fR \fIoptions\fR|\fB\-\-private=\fR\fIoptions\fR] |
| [\fB\-r\fR|\fB\-\-reloc\fR] |
| [\fB\-R\fR|\fB\-\-dynamic\-reloc\fR] |
| [\fB\-s\fR|\fB\-\-full\-contents\fR] |
| [\fB\-W[lLiaprmfFsoRt]\fR| |
| \fB\-\-dwarf\fR[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames\-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]] |
| [\fB\-G\fR|\fB\-\-stabs\fR] |
| [\fB\-t\fR|\fB\-\-syms\fR] |
| [\fB\-T\fR|\fB\-\-dynamic\-syms\fR] |
| [\fB\-x\fR|\fB\-\-all\-headers\fR] |
| [\fB\-w\fR|\fB\-\-wide\fR] |
| [\fB\-\-start\-address=\fR\fIaddress\fR] |
| [\fB\-\-stop\-address=\fR\fIaddress\fR] |
| [\fB\-\-prefix\-addresses\fR] |
| [\fB\-\-[no\-]show\-raw\-insn\fR] |
| [\fB\-\-adjust\-vma=\fR\fIoffset\fR] |
| [\fB\-\-special\-syms\fR] |
| [\fB\-\-prefix=\fR\fIprefix\fR] |
| [\fB\-\-prefix\-strip=\fR\fIlevel\fR] |
| [\fB\-\-insn\-width=\fR\fIwidth\fR] |
| [\fB\-V\fR|\fB\-\-version\fR] |
| [\fB\-H\fR|\fB\-\-help\fR] |
| \fIobjfile\fR... |
| .SH "DESCRIPTION" |
| .IX Header "DESCRIPTION" |
| \&\fBobjdump\fR 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. |
| .PP |
| \&\fIobjfile\fR... are the object files to be examined. When you |
| specify archives, \fBobjdump\fR shows information on each of the member |
| object files. |
| .SH "OPTIONS" |
| .IX Header "OPTIONS" |
| The long and short forms of options, shown here as alternatives, are |
| equivalent. At least one option from the list |
| \&\fB\-a,\-d,\-D,\-e,\-f,\-g,\-G,\-h,\-H,\-p,\-P,\-r,\-R,\-s,\-S,\-t,\-T,\-V,\-x\fR must be given. |
| .IP "\fB\-a\fR" 4 |
| .IX Item "-a" |
| .PD 0 |
| .IP "\fB\-\-archive\-header\fR" 4 |
| .IX Item "--archive-header" |
| .PD |
| If any of the \fIobjfile\fR files are archives, display the archive |
| header information (in a format similar to \fBls \-l\fR). Besides the |
| information you could list with \fBar tv\fR, \fBobjdump \-a\fR shows |
| the object file format of each archive member. |
| .IP "\fB\-\-adjust\-vma=\fR\fIoffset\fR" 4 |
| .IX Item "--adjust-vma=offset" |
| When dumping information, first add \fIoffset\fR 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. |
| .IP "\fB\-b\fR \fIbfdname\fR" 4 |
| .IX Item "-b bfdname" |
| .PD 0 |
| .IP "\fB\-\-target=\fR\fIbfdname\fR" 4 |
| .IX Item "--target=bfdname" |
| .PD |
| Specify that the object-code format for the object files is |
| \&\fIbfdname\fR. This option may not be necessary; \fIobjdump\fR can |
| automatically recognize many formats. |
| .Sp |
| For example, |
| .Sp |
| .Vb 1 |
| \& objdump \-b oasys \-m vax \-h fu.o |
| .Ve |
| .Sp |
| displays summary information from the section headers (\fB\-h\fR) of |
| \&\fIfu.o\fR, which is explicitly identified (\fB\-m\fR) as a \s-1VAX\s0 object |
| file in the format produced by Oasys compilers. You can list the |
| formats available with the \fB\-i\fR option. |
| .IP "\fB\-C\fR" 4 |
| .IX Item "-C" |
| .PD 0 |
| .IP "\fB\-\-demangle[=\fR\fIstyle\fR\fB]\fR" 4 |
| .IX Item "--demangle[=style]" |
| .PD |
| Decode (\fIdemangle\fR) 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. |
| .IP "\fB\-g\fR" 4 |
| .IX Item "-g" |
| .PD 0 |
| .IP "\fB\-\-debugging\fR" 4 |
| .IX Item "--debugging" |
| .PD |
| Display debugging information. This attempts to parse \s-1STABS\s0 and \s-1IEEE\s0 |
| 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 \fB\-W\fR option to print any \s-1DWARF\s0 information in |
| the file. |
| .IP "\fB\-e\fR" 4 |
| .IX Item "-e" |
| .PD 0 |
| .IP "\fB\-\-debugging\-tags\fR" 4 |
| .IX Item "--debugging-tags" |
| .PD |
| Like \fB\-g\fR, but the information is generated in a format compatible |
| with ctags tool. |
| .IP "\fB\-d\fR" 4 |
| .IX Item "-d" |
| .PD 0 |
| .IP "\fB\-\-disassemble\fR" 4 |
| .IX Item "--disassemble" |
| .PD |
| Display the assembler mnemonics for the machine instructions from |
| \&\fIobjfile\fR. This option only disassembles those sections which are |
| expected to contain instructions. |
| .IP "\fB\-D\fR" 4 |
| .IX Item "-D" |
| .PD 0 |
| .IP "\fB\-\-disassemble\-all\fR" 4 |
| .IX Item "--disassemble-all" |
| .PD |
| Like \fB\-d\fR, but disassemble the contents of all sections, not just |
| those expected to contain instructions. |
| .Sp |
| If the target is an \s-1ARM\s0 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. |
| .IP "\fB\-\-prefix\-addresses\fR" 4 |
| .IX Item "--prefix-addresses" |
| When disassembling, print the complete address on each line. This is |
| the older disassembly format. |
| .IP "\fB\-EB\fR" 4 |
| .IX Item "-EB" |
| .PD 0 |
| .IP "\fB\-EL\fR" 4 |
| .IX Item "-EL" |
| .IP "\fB\-\-endian={big|little}\fR" 4 |
| .IX Item "--endian={big|little}" |
| .PD |
| 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. |
| .IP "\fB\-f\fR" 4 |
| .IX Item "-f" |
| .PD 0 |
| .IP "\fB\-\-file\-headers\fR" 4 |
| .IX Item "--file-headers" |
| .PD |
| Display summary information from the overall header of |
| each of the \fIobjfile\fR files. |
| .IP "\fB\-F\fR" 4 |
| .IX Item "-F" |
| .PD 0 |
| .IP "\fB\-\-file\-offsets\fR" 4 |
| .IX Item "--file-offsets" |
| .PD |
| 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. |
| .IP "\fB\-\-file\-start\-context\fR" 4 |
| .IX Item "--file-start-context" |
| Specify that when displaying interlisted source code/disassembly |
| (assumes \fB\-S\fR) from a file that has not yet been displayed, extend the |
| context to the start of the file. |
| .IP "\fB\-h\fR" 4 |
| .IX Item "-h" |
| .PD 0 |
| .IP "\fB\-\-section\-headers\fR" 4 |
| .IX Item "--section-headers" |
| .IP "\fB\-\-headers\fR" 4 |
| .IX Item "--headers" |
| .PD |
| Display summary information from the section headers of the |
| object file. |
| .Sp |
| File segments may be relocated to nonstandard addresses, for example by |
| using the \fB\-Ttext\fR, \fB\-Tdata\fR, or \fB\-Tbss\fR options to |
| \&\fBld\fR. However, some object file formats, such as a.out, do not |
| store the starting address of the file segments. In those situations, |
| although \fBld\fR relocates the sections correctly, using \fBobjdump |
| \&\-h\fR to list the file section headers cannot show the correct addresses. |
| Instead, it shows the usual addresses, which are implicit for the |
| target. |
| .IP "\fB\-H\fR" 4 |
| .IX Item "-H" |
| .PD 0 |
| .IP "\fB\-\-help\fR" 4 |
| .IX Item "--help" |
| .PD |
| Print a summary of the options to \fBobjdump\fR and exit. |
| .IP "\fB\-i\fR" 4 |
| .IX Item "-i" |
| .PD 0 |
| .IP "\fB\-\-info\fR" 4 |
| .IX Item "--info" |
| .PD |
| Display a list showing all architectures and object formats available |
| for specification with \fB\-b\fR or \fB\-m\fR. |
| .IP "\fB\-j\fR \fIname\fR" 4 |
| .IX Item "-j name" |
| .PD 0 |
| .IP "\fB\-\-section=\fR\fIname\fR" 4 |
| .IX Item "--section=name" |
| .PD |
| Display information only for section \fIname\fR. |
| .IP "\fB\-l\fR" 4 |
| .IX Item "-l" |
| .PD 0 |
| .IP "\fB\-\-line\-numbers\fR" 4 |
| .IX Item "--line-numbers" |
| .PD |
| Label the display (using debugging information) with the filename and |
| source line numbers corresponding to the object code or relocs shown. |
| Only useful with \fB\-d\fR, \fB\-D\fR, or \fB\-r\fR. |
| .IP "\fB\-m\fR \fImachine\fR" 4 |
| .IX Item "-m machine" |
| .PD 0 |
| .IP "\fB\-\-architecture=\fR\fImachine\fR" 4 |
| .IX Item "--architecture=machine" |
| .PD |
| 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 \fB\-i\fR option. |
| .Sp |
| If the target is an \s-1ARM\s0 architecture then this switch has an |
| additional effect. It restricts the disassembly to only those |
| instructions supported by the architecture specified by \fImachine\fR. |
| 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 \fB\-marm\fR. |
| .IP "\fB\-M\fR \fIoptions\fR" 4 |
| .IX Item "-M options" |
| .PD 0 |
| .IP "\fB\-\-disassembler\-options=\fR\fIoptions\fR" 4 |
| .IX Item "--disassembler-options=options" |
| .PD |
| 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 \fB\-M\fR options can be used or |
| can be placed together into a comma separated list. |
| .Sp |
| If the target is an \s-1ARM\s0 architecture then this switch can be used to |
| select which register name set is used during disassembler. Specifying |
| \&\fB\-M reg-names-std\fR (the default) will select the register names as |
| used in \s-1ARM\s0's instruction set documentation, but with register 13 called |
| \&'sp', register 14 called 'lr' and register 15 called 'pc'. Specifying |
| \&\fB\-M reg-names-apcs\fR will select the name set used by the \s-1ARM\s0 |
| Procedure Call Standard, whilst specifying \fB\-M reg-names-raw\fR will |
| just use \fBr\fR followed by the register number. |
| .Sp |
| There are also two variants on the \s-1APCS\s0 register naming scheme enabled |
| by \fB\-M reg-names-atpcs\fR and \fB\-M reg-names-special-atpcs\fR which |
| use the ARM/Thumb Procedure Call Standard naming conventions. (Either |
| with the normal register names or the special register names). |
| .Sp |
| This option can also be used for \s-1ARM\s0 architectures to force the |
| disassembler to interpret all instructions as Thumb instructions by |
| using the switch \fB\-\-disassembler\-options=force\-thumb\fR. This can be |
| useful when attempting to disassemble thumb code produced by other |
| compilers. |
| .Sp |
| For the x86, some of the options duplicate functions of the \fB\-m\fR |
| switch, but allow finer grained control. Multiple selections from the |
| following may be specified as a comma separated string. |
| \&\fBx86\-64\fR, \fBi386\fR and \fBi8086\fR select disassembly for |
| the given architecture. \fBintel\fR and \fBatt\fR select between |
| intel syntax mode and \s-1AT&T\s0 syntax mode. |
| \&\fBintel-mnemonic\fR and \fBatt-mnemonic\fR select between |
| intel mnemonic mode and \s-1AT&T\s0 mnemonic mode. \fBintel-mnemonic\fR |
| implies \fBintel\fR and \fBatt-mnemonic\fR implies \fBatt\fR. |
| \&\fBaddr64\fR, \fBaddr32\fR, |
| \&\fBaddr16\fR, \fBdata32\fR and \fBdata16\fR specify the default |
| address size and operand size. These four options will be overridden if |
| \&\fBx86\-64\fR, \fBi386\fR or \fBi8086\fR appear later in the |
| option string. Lastly, \fBsuffix\fR, when in \s-1AT&T\s0 mode, |
| instructs the disassembler to print a mnemonic suffix even when the |
| suffix could be inferred by the operands. |
| .Sp |
| For PowerPC, \fBbooke\fR controls the disassembly of BookE |
| instructions. \fB32\fR and \fB64\fR select PowerPC and |
| PowerPC64 disassembly, respectively. \fBe300\fR selects |
| disassembly for the e300 family. \fB440\fR selects disassembly for |
| the PowerPC 440. \fBppcps\fR selects disassembly for the paired |
| single instructions of the \s-1PPC750CL\s0. |
| .Sp |
| For \s-1MIPS\s0, 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: |
| .RS 4 |
| .ie n .IP """no\-aliases""" 4 |
| .el .IP "\f(CWno\-aliases\fR" 4 |
| .IX Item "no-aliases" |
| 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. |
| .ie n .IP """virt""" 4 |
| .el .IP "\f(CWvirt\fR" 4 |
| .IX Item "virt" |
| Disassemble the virtualization \s-1ASE\s0 instructions. |
| .ie n .IP """gpr\-names=\f(CIABI\f(CW""" 4 |
| .el .IP "\f(CWgpr\-names=\f(CIABI\f(CW\fR" 4 |
| .IX Item "gpr-names=ABI" |
| Print \s-1GPR\s0 (general-purpose register) names as appropriate |
| for the specified \s-1ABI\s0. By default, \s-1GPR\s0 names are selected according to |
| the \s-1ABI\s0 of the binary being disassembled. |
| .ie n .IP """fpr\-names=\f(CIABI\f(CW""" 4 |
| .el .IP "\f(CWfpr\-names=\f(CIABI\f(CW\fR" 4 |
| .IX Item "fpr-names=ABI" |
| Print \s-1FPR\s0 (floating-point register) names as |
| appropriate for the specified \s-1ABI\s0. By default, \s-1FPR\s0 numbers are printed |
| rather than names. |
| .ie n .IP """cp0\-names=\f(CIARCH\f(CW""" 4 |
| .el .IP "\f(CWcp0\-names=\f(CIARCH\f(CW\fR" 4 |
| .IX Item "cp0-names=ARCH" |
| Print \s-1CP0\s0 (system control coprocessor; coprocessor 0) register names |
| as appropriate for the \s-1CPU\s0 or architecture specified by |
| \&\fI\s-1ARCH\s0\fR. By default, \s-1CP0\s0 register names are selected according to |
| the architecture and \s-1CPU\s0 of the binary being disassembled. |
| .ie n .IP """hwr\-names=\f(CIARCH\f(CW""" 4 |
| .el .IP "\f(CWhwr\-names=\f(CIARCH\f(CW\fR" 4 |
| .IX Item "hwr-names=ARCH" |
| Print \s-1HWR\s0 (hardware register, used by the \f(CW\*(C`rdhwr\*(C'\fR instruction) names |
| as appropriate for the \s-1CPU\s0 or architecture specified by |
| \&\fI\s-1ARCH\s0\fR. By default, \s-1HWR\s0 names are selected according to |
| the architecture and \s-1CPU\s0 of the binary being disassembled. |
| .ie n .IP """reg\-names=\f(CIABI\f(CW""" 4 |
| .el .IP "\f(CWreg\-names=\f(CIABI\f(CW\fR" 4 |
| .IX Item "reg-names=ABI" |
| Print \s-1GPR\s0 and \s-1FPR\s0 names as appropriate for the selected \s-1ABI\s0. |
| .ie n .IP """reg\-names=\f(CIARCH\f(CW""" 4 |
| .el .IP "\f(CWreg\-names=\f(CIARCH\f(CW\fR" 4 |
| .IX Item "reg-names=ARCH" |
| Print CPU-specific register names (\s-1CP0\s0 register and \s-1HWR\s0 names) |
| as appropriate for the selected \s-1CPU\s0 or architecture. |
| .RE |
| .RS 4 |
| .Sp |
| For any of the options listed above, \fI\s-1ABI\s0\fR or |
| \&\fI\s-1ARCH\s0\fR may be specified as \fBnumeric\fR to have numbers printed |
| rather than names, for the selected types of registers. |
| You can list the available values of \fI\s-1ABI\s0\fR and \fI\s-1ARCH\s0\fR using |
| the \fB\-\-help\fR option. |
| .Sp |
| For \s-1VAX\s0, you can specify function entry addresses with \fB\-M |
| entry:0xf00ba\fR. You can use this multiple times to properly |
| disassemble \s-1VAX\s0 binary files that don't contain symbol tables (like |
| \&\s-1ROM\s0 dumps). In these cases, the function entry mask would otherwise |
| be decoded as \s-1VAX\s0 instructions, which would probably lead the rest |
| of the function being wrongly disassembled. |
| .RE |
| .IP "\fB\-p\fR" 4 |
| .IX Item "-p" |
| .PD 0 |
| .IP "\fB\-\-private\-headers\fR" 4 |
| .IX Item "--private-headers" |
| .PD |
| 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. |
| .IP "\fB\-P\fR \fIoptions\fR" 4 |
| .IX Item "-P options" |
| .PD 0 |
| .IP "\fB\-\-private=\fR\fIoptions\fR" 4 |
| .IX Item "--private=options" |
| .PD |
| Print information that is specific to the object file format. The |
| argument \fIoptions\fR is a comma separated list that depends on the |
| format (the lists of options is displayed with the help). |
| .Sp |
| For \s-1XCOFF\s0, the available options are: \fBheader\fR, \fBaout\fR, |
| \&\fBsections\fR, \fBsyms\fR, \fBrelocs\fR, \fBlineno\fR, |
| \&\fBloader\fR, \fBexcept\fR, \fBtypchk\fR, \fBtraceback\fR, |
| \&\fBtoc\fR and \fBldinfo\fR. |
| .IP "\fB\-r\fR" 4 |
| .IX Item "-r" |
| .PD 0 |
| .IP "\fB\-\-reloc\fR" 4 |
| .IX Item "--reloc" |
| .PD |
| Print the relocation entries of the file. If used with \fB\-d\fR or |
| \&\fB\-D\fR, the relocations are printed interspersed with the |
| disassembly. |
| .IP "\fB\-R\fR" 4 |
| .IX Item "-R" |
| .PD 0 |
| .IP "\fB\-\-dynamic\-reloc\fR" 4 |
| .IX Item "--dynamic-reloc" |
| .PD |
| Print the dynamic relocation entries of the file. This is only |
| meaningful for dynamic objects, such as certain types of shared |
| libraries. As for \fB\-r\fR, if used with \fB\-d\fR or |
| \&\fB\-D\fR, the relocations are printed interspersed with the |
| disassembly. |
| .IP "\fB\-s\fR" 4 |
| .IX Item "-s" |
| .PD 0 |
| .IP "\fB\-\-full\-contents\fR" 4 |
| .IX Item "--full-contents" |
| .PD |
| Display the full contents of any sections requested. By default all |
| non-empty sections are displayed. |
| .IP "\fB\-S\fR" 4 |
| .IX Item "-S" |
| .PD 0 |
| .IP "\fB\-\-source\fR" 4 |
| .IX Item "--source" |
| .PD |
| Display source code intermixed with disassembly, if possible. Implies |
| \&\fB\-d\fR. |
| .IP "\fB\-\-prefix=\fR\fIprefix\fR" 4 |
| .IX Item "--prefix=prefix" |
| Specify \fIprefix\fR to add to the absolute paths when used with |
| \&\fB\-S\fR. |
| .IP "\fB\-\-prefix\-strip=\fR\fIlevel\fR" 4 |
| .IX Item "--prefix-strip=level" |
| Indicate how many initial directory names to strip off the hardwired |
| absolute paths. It has no effect without \fB\-\-prefix=\fR\fIprefix\fR. |
| .IP "\fB\-\-show\-raw\-insn\fR" 4 |
| .IX Item "--show-raw-insn" |
| When disassembling instructions, print the instruction in hex as well as |
| in symbolic form. This is the default except when |
| \&\fB\-\-prefix\-addresses\fR is used. |
| .IP "\fB\-\-no\-show\-raw\-insn\fR" 4 |
| .IX Item "--no-show-raw-insn" |
| When disassembling instructions, do not print the instruction bytes. |
| This is the default when \fB\-\-prefix\-addresses\fR is used. |
| .IP "\fB\-\-insn\-width=\fR\fIwidth\fR" 4 |
| .IX Item "--insn-width=width" |
| Display \fIwidth\fR bytes on a single line when disassembling |
| instructions. |
| .IP "\fB\-W[lLiaprmfFsoRt]\fR" 4 |
| .IX Item "-W[lLiaprmfFsoRt]" |
| .PD 0 |
| .IP "\fB\-\-dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames\-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]\fR" 4 |
| .IX Item "--dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]" |
| .PD |
| 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. |
| .Sp |
| Note that there is no single letter option to display the content of |
| trace sections or .gdb_index. |
| .Sp |
| Note: the output from the \fB=info\fR option can also be affected |
| by the options \fB\-\-dwarf\-depth\fR, the \fB\-\-dwarf\-start\fR and |
| the \fB\-\-dwarf\-check\fR. |
| .IP "\fB\-\-dwarf\-depth=\fR\fIn\fR" 4 |
| .IX Item "--dwarf-depth=n" |
| Limit the dump of the \f(CW\*(C`.debug_info\*(C'\fR section to \fIn\fR children. |
| This is only useful with \fB\-\-dwarf=info\fR. The default is |
| to print all DIEs; the special value 0 for \fIn\fR will also have this |
| effect. |
| .Sp |
| With a non-zero value for \fIn\fR, DIEs at or deeper than \fIn\fR |
| levels will not be printed. The range for \fIn\fR is zero-based. |
| .IP "\fB\-\-dwarf\-start=\fR\fIn\fR" 4 |
| .IX Item "--dwarf-start=n" |
| Print only DIEs beginning with the \s-1DIE\s0 numbered \fIn\fR. This is only |
| useful with \fB\-\-dwarf=info\fR. |
| .Sp |
| If specified, this option will suppress printing of any header |
| information and all DIEs before the \s-1DIE\s0 numbered \fIn\fR. Only |
| siblings and children of the specified \s-1DIE\s0 will be printed. |
| .Sp |
| This can be used in conjunction with \fB\-\-dwarf\-depth\fR. |
| .IP "\fB\-\-dwarf\-check\fR" 4 |
| .IX Item "--dwarf-check" |
| Enable additional checks for consistency of Dwarf information. |
| .IP "\fB\-G\fR" 4 |
| .IX Item "-G" |
| .PD 0 |
| .IP "\fB\-\-stabs\fR" 4 |
| .IX Item "--stabs" |
| .PD |
| Display the full contents of any sections requested. Display the |
| contents of the .stab and .stab.index and .stab.excl sections from an |
| \&\s-1ELF\s0 file. This is only useful on systems (such as Solaris 2.0) in which |
| \&\f(CW\*(C`.stab\*(C'\fR debugging symbol-table entries are carried in an \s-1ELF\s0 |
| section. In most other file formats, debugging symbol-table entries are |
| interleaved with linkage symbols, and are visible in the \fB\-\-syms\fR |
| output. |
| .IP "\fB\-\-start\-address=\fR\fIaddress\fR" 4 |
| .IX Item "--start-address=address" |
| Start displaying data at the specified address. This affects the output |
| of the \fB\-d\fR, \fB\-r\fR and \fB\-s\fR options. |
| .IP "\fB\-\-stop\-address=\fR\fIaddress\fR" 4 |
| .IX Item "--stop-address=address" |
| Stop displaying data at the specified address. This affects the output |
| of the \fB\-d\fR, \fB\-r\fR and \fB\-s\fR options. |
| .IP "\fB\-t\fR" 4 |
| .IX Item "-t" |
| .PD 0 |
| .IP "\fB\-\-syms\fR" 4 |
| .IX Item "--syms" |
| .PD |
| Print the symbol table entries of the file. |
| This is similar to the information provided by the \fBnm\fR 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: |
| .Sp |
| .Vb 2 |
| \& [ 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 |
| .Ve |
| .Sp |
| where the number inside the square brackets is the number of the entry |
| in the symbol table, the \fIsec\fR number is the section number, the |
| \&\fIfl\fR value are the symbol's flag bits, the \fIty\fR number is the |
| symbol's type, the \fIscl\fR number is the symbol's storage class and |
| the \fInx\fR value is the number of auxilary entries associated with |
| the symbol. The last two fields are the symbol's value and its name. |
| .Sp |
| The other common output format, usually seen with \s-1ELF\s0 based files, |
| looks like this: |
| .Sp |
| .Vb 2 |
| \& 00000000 l d .bss 00000000 .bss |
| \& 00000000 g .text 00000000 fred |
| .Ve |
| .Sp |
| 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 \fI*ABS*\fR if the section is absolute (ie |
| not connected with any section), or \fI*UND*\fR if the section is |
| referenced in the file being dumped, but not defined there. |
| .Sp |
| 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. |
| .Sp |
| The flag characters are divided into 7 groups as follows: |
| .RS 4 |
| .ie n .IP """l""" 4 |
| .el .IP "\f(CWl\fR" 4 |
| .IX Item "l" |
| .PD 0 |
| .ie n .IP """g""" 4 |
| .el .IP "\f(CWg\fR" 4 |
| .IX Item "g" |
| .ie n .IP """u""" 4 |
| .el .IP "\f(CWu\fR" 4 |
| .IX Item "u" |
| .ie n .IP """!""" 4 |
| .el .IP "\f(CW!\fR" 4 |
| .IX Item "!" |
| .PD |
| 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 \s-1GNU\s0 extension to the standard set of \s-1ELF\s0 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. |
| .ie n .IP """w""" 4 |
| .el .IP "\f(CWw\fR" 4 |
| .IX Item "w" |
| The symbol is weak (w) or strong (a space). |
| .ie n .IP """C""" 4 |
| .el .IP "\f(CWC\fR" 4 |
| .IX Item "C" |
| The symbol denotes a constructor (C) or an ordinary symbol (a space). |
| .ie n .IP """W""" 4 |
| .el .IP "\f(CWW\fR" 4 |
| .IX Item "W" |
| 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. |
| .ie n .IP """I""" 4 |
| .el .IP "\f(CWI\fR" 4 |
| .IX Item "I" |
| .PD 0 |
| .ie n .IP """i""" 4 |
| .el .IP "\f(CWi\fR" 4 |
| .IX Item "i" |
| .PD |
| 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). |
| .ie n .IP """d""" 4 |
| .el .IP "\f(CWd\fR" 4 |
| .IX Item "d" |
| .PD 0 |
| .ie n .IP """D""" 4 |
| .el .IP "\f(CWD\fR" 4 |
| .IX Item "D" |
| .PD |
| The symbol is a debugging symbol (d) or a dynamic symbol (D) or a |
| normal symbol (a space). |
| .ie n .IP """F""" 4 |
| .el .IP "\f(CWF\fR" 4 |
| .IX Item "F" |
| .PD 0 |
| .ie n .IP """f""" 4 |
| .el .IP "\f(CWf\fR" 4 |
| .IX Item "f" |
| .ie n .IP """O""" 4 |
| .el .IP "\f(CWO\fR" 4 |
| .IX Item "O" |
| .PD |
| The symbol is the name of a function (F) or a file (f) or an object |
| (O) or just a normal symbol (a space). |
| .RE |
| .RS 4 |
| .RE |
| .IP "\fB\-T\fR" 4 |
| .IX Item "-T" |
| .PD 0 |
| .IP "\fB\-\-dynamic\-syms\fR" 4 |
| .IX Item "--dynamic-syms" |
| .PD |
| 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 \fBnm\fR |
| program when given the \fB\-D\fR (\fB\-\-dynamic\fR) option. |
| .IP "\fB\-\-special\-syms\fR" 4 |
| .IX Item "--special-syms" |
| 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. |
| .IP "\fB\-V\fR" 4 |
| .IX Item "-V" |
| .PD 0 |
| .IP "\fB\-\-version\fR" 4 |
| .IX Item "--version" |
| .PD |
| Print the version number of \fBobjdump\fR and exit. |
| .IP "\fB\-x\fR" 4 |
| .IX Item "-x" |
| .PD 0 |
| .IP "\fB\-\-all\-headers\fR" 4 |
| .IX Item "--all-headers" |
| .PD |
| Display all available header information, including the symbol table and |
| relocation entries. Using \fB\-x\fR is equivalent to specifying all of |
| \&\fB\-a \-f \-h \-p \-r \-t\fR. |
| .IP "\fB\-w\fR" 4 |
| .IX Item "-w" |
| .PD 0 |
| .IP "\fB\-\-wide\fR" 4 |
| .IX Item "--wide" |
| .PD |
| Format some lines for output devices that have more than 80 columns. |
| Also do not truncate symbol names when they are displayed. |
| .IP "\fB\-z\fR" 4 |
| .IX Item "-z" |
| .PD 0 |
| .IP "\fB\-\-disassemble\-zeroes\fR" 4 |
| .IX Item "--disassemble-zeroes" |
| .PD |
| Normally the disassembly output will skip blocks of zeroes. This |
| option directs the disassembler to disassemble those blocks, just like |
| any other data. |
| .IP "\fB@\fR\fIfile\fR" 4 |
| .IX Item "@file" |
| Read command-line options from \fIfile\fR. The options read are |
| inserted in place of the original @\fIfile\fR option. If \fIfile\fR |
| does not exist, or cannot be read, then the option will be treated |
| literally, and not removed. |
| .Sp |
| Options in \fIfile\fR are separated by whitespace. A whitespace |
| character may be included in an option by surrounding the entire |
| option in either single or double quotes. Any character (including a |
| backslash) may be included by prefixing the character to be included |
| with a backslash. The \fIfile\fR may itself contain additional |
| @\fIfile\fR options; any such options will be processed recursively. |
| .SH "SEE ALSO" |
| .IX Header "SEE ALSO" |
| \&\fInm\fR\|(1), \fIreadelf\fR\|(1), and the Info entries for \fIbinutils\fR. |
| .SH "COPYRIGHT" |
| .IX Header "COPYRIGHT" |
| Copyright (c) 1991\-2013 Free Software Foundation, Inc. |
| .PP |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the \s-1GNU\s0 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 \*(L"\s-1GNU\s0 Free Documentation License\*(R". |