459 lines
18 KiB
Groff
459 lines
18 KiB
Groff
.\" Automatically generated by Pod::Man version 1.02
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.\" Wed May 30 12:24:28 2001
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.\" ======================================================================
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.\"
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.IX Title "OBJDUMP.1 1"
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.TH OBJDUMP.1 1 "binutils-2.11.90" "2001-05-30" "GNU"
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.UC
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.SH "NAME"
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objdump \- display information from object files.
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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objdump [ \-a | \-\-archive-headers ]
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[ \-b \fIbfdname\fR | \-\-target=\fIbfdname\fR ]
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[ \-C | \-\-demangle[=\fIstyle\fR] ]
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[ \-d | \-\-disassemble ]
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[ \-D | \-\-disassemble-all ]
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[ \-z | \-\-disassemble-zeroes ]
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[ \-EB | \-EL | \-\-endian={big | little } ]
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[ \-f | \-\-file-headers ]
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[ \-\-file-start-context ]
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[ \-g | \-\-debugging ]
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[ \-h | \-\-section-headers | \-\-headers ]
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[ \-i | \-\-info ]
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[ \-j \fIsection\fR | \-\-section=\fIsection\fR ]
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[ \-l | \-\-line-numbers ]
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[ \-S | \-\-source ]
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[ \-m \fImachine\fR | \-\-architecture=\fImachine\fR ]
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[ \-M \fIoptions\fR | \-\-disassembler-options=\fIoptions\fR]
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[ \-p | \-\-private-headers ]
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[ \-r | \-\-reloc ]
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[ \-R | \-\-dynamic-reloc ]
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[ \-s | \-\-full-contents ]
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[ \-G | \-\-stabs ]
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[ \-t | \-\-syms ]
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[ \-T | \-\-dynamic-syms ]
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[ \-x | \-\-all-headers ]
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[ \-w | \-\-wide ]
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[ \-\-start-address=\fIaddress\fR ]
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[ \-\-stop-address=\fIaddress\fR ]
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[ \-\-prefix-addresses]
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[ \-\-[no-]show-raw-insn ]
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[ \-\-adjust-vma=\fIoffset\fR ]
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[ \-V | \-\-version ]
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[ \-H | \-\-help ]
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\fIobjfile\fR...
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\f(CW\*(C`objdump\*(C'\fR displays information about one or more object files.
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The options control what particular information to display. This
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information is mostly useful to programmers who are working on the
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compilation tools, as opposed to programmers who just want their
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program to compile and work.
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.PP
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\&\fIobjfile\fR... are the object files to be examined. When you
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specify archives, \f(CW\*(C`objdump\*(C'\fR shows information on each of the member
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object files.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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The long and short forms of options, shown here as alternatives, are
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equivalent. At least one option from the list
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\&\fB\-a,\-d,\-D,\-f,\-g,\-G,\-h,\-H,\-p,\-r,\-R,\-S,\-t,\-T,\-V,\-x\fR must be given.
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.Ip "\f(CW\*(C`\-a\*(C'\fR" 4
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.IX Item "-a"
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.Ip "\f(CW\*(C`\-\-archive\-header\*(C'\fR" 4
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.IX Item "--archive-header"
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If any of the \fIobjfile\fR files are archives, display the archive
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header information (in a format similar to \fBls \-l\fR). Besides the
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information you could list with \fBar tv\fR, \fBobjdump \-a\fR shows
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the object file format of each archive member.
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.Ip "\f(CW\*(C`\-\-adjust\-vma=\f(CIoffset\f(CW\*(C'\fR" 4
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.IX Item "--adjust-vma=offset"
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When dumping information, first add \fIoffset\fR to all the section
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addresses. This is useful if the section addresses do not correspond to
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the symbol table, which can happen when putting sections at particular
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addresses when using a format which can not represent section addresses,
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such as a.out.
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.Ip "\f(CW\*(C`\-b \f(CIbfdname\f(CW\*(C'\fR" 4
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.IX Item "-b bfdname"
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.Ip "\f(CW\*(C`\-\-target=\f(CIbfdname\f(CW\*(C'\fR" 4
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.IX Item "--target=bfdname"
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Specify that the object-code format for the object files is
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\&\fIbfdname\fR. This option may not be necessary; \fIobjdump\fR can
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automatically recognize many formats.
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.Sp
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For example,
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.Sp
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.Vb 1
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\& objdump -b oasys -m vax -h fu.o
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.Ve
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displays summary information from the section headers (\fB\-h\fR) of
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\&\fIfu.o\fR, which is explicitly identified (\fB\-m\fR) as a \s-1VAX\s0 object
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file in the format produced by Oasys compilers. You can list the
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formats available with the \fB\-i\fR option.
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.Ip "\f(CW\*(C`\-C\*(C'\fR" 4
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.IX Item "-C"
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.Ip "\f(CW\*(C`\-\-demangle[=\f(CIstyle\f(CW]\*(C'\fR" 4
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.IX Item "--demangle[=style]"
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Decode (\fIdemangle\fR) low-level symbol names into user-level names.
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Besides removing any initial underscore prepended by the system, this
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makes \*(C+ function names readable. Different compilers have different
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mangling styles. The optional demangling style argument can be used to
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choose an appropriate demangling style for your compiler.
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.Ip "\f(CW\*(C`\-G\*(C'\fR" 4
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.IX Item "-G"
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.Ip "\f(CW\*(C`\-\-debugging\*(C'\fR" 4
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.IX Item "--debugging"
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Display debugging information. This attempts to parse debugging
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information stored in the file and print it out using a C like syntax.
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Only certain types of debugging information have been implemented.
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.Ip "\f(CW\*(C`\-d\*(C'\fR" 4
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.IX Item "-d"
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.Ip "\f(CW\*(C`\-\-disassemble\*(C'\fR" 4
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.IX Item "--disassemble"
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|
Display the assembler mnemonics for the machine instructions from
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\&\fIobjfile\fR. This option only disassembles those sections which are
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expected to contain instructions.
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.Ip "\f(CW\*(C`\-D\*(C'\fR" 4
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.IX Item "-D"
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.Ip "\f(CW\*(C`\-\-disassemble\-all\*(C'\fR" 4
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.IX Item "--disassemble-all"
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Like \fB\-d\fR, but disassemble the contents of all sections, not just
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those expected to contain instructions.
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.Ip "\f(CW\*(C`\-\-prefix\-addresses\*(C'\fR" 4
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.IX Item "--prefix-addresses"
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When disassembling, print the complete address on each line. This is
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the older disassembly format.
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.Ip "\f(CW\*(C`\-\-disassemble\-zeroes\*(C'\fR" 4
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.IX Item "--disassemble-zeroes"
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Normally the disassembly output will skip blocks of zeroes. This
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option directs the disassembler to disassemble those blocks, just like
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any other data.
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.Ip "\f(CW\*(C`\-EB\*(C'\fR" 4
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.IX Item "-EB"
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.Ip "\f(CW\*(C`\-EL\*(C'\fR" 4
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.IX Item "-EL"
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.Ip "\f(CW\*(C`\-\-endian={big|little}\*(C'\fR" 4
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.IX Item "--endian={big|little}"
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Specify the endianness of the object files. This only affects
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disassembly. This can be useful when disassembling a file format which
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does not describe endianness information, such as S-records.
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.Ip "\f(CW\*(C`\-f\*(C'\fR" 4
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.IX Item "-f"
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.Ip "\f(CW\*(C`\-\-file\-header\*(C'\fR" 4
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.IX Item "--file-header"
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Display summary information from the overall header of
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each of the \fIobjfile\fR files.
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.Ip "\f(CW\*(C`\-\-file\-start\-context\*(C'\fR" 4
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.IX Item "--file-start-context"
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Specify that when displaying interlisted source code/disassembly
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(assumes '\-S') from a file that has not yet been displayed, extend the
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context to the start of the file.
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.Ip "\f(CW\*(C`\-h\*(C'\fR" 4
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.IX Item "-h"
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.Ip "\f(CW\*(C`\-\-section\-header\*(C'\fR" 4
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.IX Item "--section-header"
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.Ip "\f(CW\*(C`\-\-header\*(C'\fR" 4
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.IX Item "--header"
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Display summary information from the section headers of the
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object file.
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.Sp
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File segments may be relocated to nonstandard addresses, for example by
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using the \fB\-Ttext\fR, \fB\-Tdata\fR, or \fB\-Tbss\fR options to
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\&\f(CW\*(C`ld\*(C'\fR. However, some object file formats, such as a.out, do not
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store the starting address of the file segments. In those situations,
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although \f(CW\*(C`ld\*(C'\fR relocates the sections correctly, using \fBobjdump
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\&\-h\fR to list the file section headers cannot show the correct addresses.
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Instead, it shows the usual addresses, which are implicit for the
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target.
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.Ip "\f(CW\*(C`\-\-help\*(C'\fR" 4
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.IX Item "--help"
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Print a summary of the options to \f(CW\*(C`objdump\*(C'\fR and exit.
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.Ip "\f(CW\*(C`\-i\*(C'\fR" 4
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.IX Item "-i"
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.Ip "\f(CW\*(C`\-\-info\*(C'\fR" 4
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.IX Item "--info"
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Display a list showing all architectures and object formats available
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for specification with \fB\-b\fR or \fB\-m\fR.
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.Ip "\f(CW\*(C`\-j \f(CIname\f(CW\*(C'\fR" 4
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.IX Item "-j name"
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.Ip "\f(CW\*(C`\-\-section=\f(CIname\f(CW\*(C'\fR" 4
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.IX Item "--section=name"
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Display information only for section \fIname\fR.
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.Ip "\f(CW\*(C`\-l\*(C'\fR" 4
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.IX Item "-l"
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.Ip "\f(CW\*(C`\-\-line\-numbers\*(C'\fR" 4
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.IX Item "--line-numbers"
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|
Label the display (using debugging information) with the filename and
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source line numbers corresponding to the object code or relocs shown.
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Only useful with \fB\-d\fR, \fB\-D\fR, or \fB\-r\fR.
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.Ip "\f(CW\*(C`\-m \f(CImachine\f(CW\*(C'\fR" 4
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.IX Item "-m machine"
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|
.Ip "\f(CW\*(C`\-\-architecture=\f(CImachine\f(CW\*(C'\fR" 4
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.IX Item "--architecture=machine"
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|
Specify the architecture to use when disassembling object files. This
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can be useful when disassembling object files which do not describe
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architecture information, such as S-records. You can list the available
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architectures with the \fB\-i\fR option.
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.Ip "\f(CW\*(C`\-M \f(CIoptions\f(CW\*(C'\fR" 4
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.IX Item "-M options"
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.Ip "\f(CW\*(C`\-\-disassembler\-options=\f(CIoptions\f(CW\*(C'\fR" 4
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.IX Item "--disassembler-options=options"
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Pass target specific information to the disassembler. Only supported on
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some targets.
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.Sp
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If the target is an \s-1ARM\s0 architecture then this switch can be used to
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select which register name set is used during disassembler. Specifying
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\&\fB\-M reg-name-std\fR (the default) will select the register names as
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used in \s-1ARM\s0's instruction set documentation, but with register 13 called
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\&'sp', register 14 called 'lr' and register 15 called 'pc'. Specifying
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\&\fB\-M reg-names-apcs\fR will select the name set used by the \s-1ARM\s0
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|
Procedure Call Standard, whilst specifying \fB\-M reg-names-raw\fR will
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|
just use \fBr\fR followed by the register number.
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.Sp
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There are also two variants on the \s-1APCS\s0 register naming scheme enabled
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by \fB\-M reg-names-atpcs\fR and \fB\-M reg-names-special-atpcs\fR which
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use the ARM/Thumb Procedure Call Standard naming conventions. (Eiuther
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|
with the normal register name sor the special register names).
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|
.Sp
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|
This option can also be used for \s-1ARM\s0 architectures to force the
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|
disassembler to interpret all instructions as \s-1THUMB\s0 instructions by
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using the switch \fB\*(--disassembler-options=force-thumb\fR. This can be
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|
useful when attempting to disassemble thumb code produced by other
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compilers.
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.Ip "\f(CW\*(C`\-p\*(C'\fR" 4
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.IX Item "-p"
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.Ip "\f(CW\*(C`\-\-private\-headers\*(C'\fR" 4
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.IX Item "--private-headers"
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|
Print information that is specific to the object file format. The exact
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information printed depends upon the object file format. For some
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object file formats, no additional information is printed.
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.Ip "\f(CW\*(C`\-r\*(C'\fR" 4
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.IX Item "-r"
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.Ip "\f(CW\*(C`\-\-reloc\*(C'\fR" 4
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.IX Item "--reloc"
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|
Print the relocation entries of the file. If used with \fB\-d\fR or
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\&\fB\-D\fR, the relocations are printed interspersed with the
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disassembly.
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.Ip "\f(CW\*(C`\-R\*(C'\fR" 4
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.IX Item "-R"
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.Ip "\f(CW\*(C`\-\-dynamic\-reloc\*(C'\fR" 4
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.IX Item "--dynamic-reloc"
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Print the dynamic relocation entries of the file. This is only
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meaningful for dynamic objects, such as certain types of shared
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libraries.
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.Ip "\f(CW\*(C`\-s\*(C'\fR" 4
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.IX Item "-s"
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.Ip "\f(CW\*(C`\-\-full\-contents\*(C'\fR" 4
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.IX Item "--full-contents"
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Display the full contents of any sections requested.
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.Ip "\f(CW\*(C`\-S\*(C'\fR" 4
|
|
.IX Item "-S"
|
|
.Ip "\f(CW\*(C`\-\-source\*(C'\fR" 4
|
|
.IX Item "--source"
|
|
Display source code intermixed with disassembly, if possible. Implies
|
|
\&\fB\-d\fR.
|
|
.Ip "\f(CW\*(C`\-\-show\-raw\-insn\*(C'\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
|
|
\&\f(CW\*(C`\-\-prefix\-addresses\*(C'\fR is used.
|
|
.Ip "\f(CW\*(C`\-\-no\-show\-raw\-insn\*(C'\fR" 4
|
|
.IX Item "--no-show-raw-insn"
|
|
When disassembling instructions, do not print the instruction bytes.
|
|
This is the default when \f(CW\*(C`\-\-prefix\-addresses\*(C'\fR is used.
|
|
.Ip "\f(CW\*(C`\-G\*(C'\fR" 4
|
|
.IX Item "-G"
|
|
.Ip "\f(CW\*(C`\-\-stabs\*(C'\fR" 4
|
|
.IX Item "--stabs"
|
|
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 "\f(CW\*(C`\-\-start\-address=\f(CIaddress\f(CW\*(C'\fR" 4
|
|
.IX Item "--start-address=address"
|
|
Start displaying data at the specified address. This affects the output
|
|
of the \f(CW\*(C`\-d\*(C'\fR, \f(CW\*(C`\-r\*(C'\fR and \f(CW\*(C`\-s\*(C'\fR options.
|
|
.Ip "\f(CW\*(C`\-\-stop\-address=\f(CIaddress\f(CW\*(C'\fR" 4
|
|
.IX Item "--stop-address=address"
|
|
Stop displaying data at the specified address. This affects the output
|
|
of the \f(CW\*(C`\-d\*(C'\fR, \f(CW\*(C`\-r\*(C'\fR and \f(CW\*(C`\-s\*(C'\fR options.
|
|
.Ip "\f(CW\*(C`\-t\*(C'\fR" 4
|
|
.IX Item "-t"
|
|
.Ip "\f(CW\*(C`\-\-syms\*(C'\fR" 4
|
|
.IX Item "--syms"
|
|
Print the symbol table entries of the file.
|
|
This is similar to the information provided by the \fBnm\fR program.
|
|
.Ip "\f(CW\*(C`\-T\*(C'\fR" 4
|
|
.IX Item "-T"
|
|
.Ip "\f(CW\*(C`\-\-dynamic\-syms\*(C'\fR" 4
|
|
.IX Item "--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 \fBnm\fR
|
|
program when given the \fB\-D\fR (\fB\*(--dynamic\fR) option.
|
|
.Ip "\f(CW\*(C`\-\-version\*(C'\fR" 4
|
|
.IX Item "--version"
|
|
Print the version number of \f(CW\*(C`objdump\*(C'\fR and exit.
|
|
.Ip "\f(CW\*(C`\-x\*(C'\fR" 4
|
|
.IX Item "-x"
|
|
.Ip "\f(CW\*(C`\-\-all\-header\*(C'\fR" 4
|
|
.IX Item "--all-header"
|
|
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 \-r \-t\fR.
|
|
.Ip "\f(CW\*(C`\-w\*(C'\fR" 4
|
|
.IX Item "-w"
|
|
.Ip "\f(CW\*(C`\-\-wide\*(C'\fR" 4
|
|
.IX Item "--wide"
|
|
Format some lines for output devices that have more than 80 columns.
|
|
.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, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001 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 1.1
|
|
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 \*(L"\s-1GNU\s0 Free Documentation License\*(R".
|