Linux下的objdump反彙編工具
Usage: objdump <option(s)> <file(s)>
Display information from object <file(s)>.
At least one of the following switches must be given:
-a, --archive-headers Display archive header information
-f, --file-headers Display the contents of the overall file header
-p, --private-headers Display object format specific file header contents
-h, --[section-]headers Display the contents of the section headers
-x, --all-headers Display the contents of all headers
-d, --disassemble Display assembler contents of executable sections
-D, --disassemble-all Display assembler contents of all sections
-S, --source Intermix source code with disassembly
-s, --full-contents Display the full contents of all sections requested
-g, --debugging Display debug information in object file
-e, --debugging-tags Display debug information using ctags style
-G, --stabs Display (in raw form) any STABS info in the file
-W, --dwarf Display DWARF info in the file
-t, --syms Display the contents of the symbol table(s)
-T, --dynamic-syms Display the contents of the dynamic symbol table
-r, --reloc Display the relocation entries in the file
-R, --dynamic-reloc Display the dynamic relocation entries in the file
@<file> Read options from <file>
-v, --version Display this program's version number
-i, --info List object formats and architectures supported
-H, --help Display this information
The following switches are optional:
-b, --target=BFDNAME Specify the target object format as BFDNAME
-m, --architecture=MACHINE Specify the target architecture as MACHINE
-j, --section=NAME Only display information for section NAME
-M, --disassembler-options=OPT Pass text OPT on to the disassembler
-EB --endian=big Assume big endian format when disassembling
-EL --endian=little Assume little endian format when disassembling
--file-start-context Include context from start of file (with -S)
-I, --include=DIR Add DIR to search list for source files
-l, --line-numbers Include line numbers and filenames in output
-C, --demangle[=STYLE] Decode mangled/processed symbol names
The STYLE, if specified, can be `auto', `gnu',
`lucid', `arm', `hp', `edg', `gnu-v3', `java'
or `gnat'
-w, --wide Format output for more than 80 columns
-z, --disassemble-zeroes Do not skip blocks of zeroes when disassembling
--start-address=ADDR Only process data whose address is >= ADDR
--stop-address=ADDR Only process data whose address is <= ADDR
--prefix-addresses Print complete address alongside disassembly
--[no-]show-raw-insn Display hex alongside symbolic disassembly
--adjust-vma=OFFSET Add OFFSET to all displayed section addresses
--special-syms Include special symbols in symbol dumps
objdump: supported targets: elf64-x86-64 elf32-i386 a.out-i386-linux efi-app-ia32 elf64-little elf64-big elf32-little elf32-big srec symbolsrec tekhex binary ihex
objdump: supported architectures: i386 i386:x86-64 i8086 i386:intel i386:x86-64:intel
Report bugs to <URL:http://www.sourceware.org/bugzilla/> and
[[email protected] controller1]$ objdump --help
Usage: objdump <option(s)> <file(s)>
用法： objdump <選項> <反彙編的檔案列表>
Display information from object <file(s)>.
功能：顯示來自目標檔案<files>中的資訊。
At least one of the following switches must be given:
至少給出下面的一個選項開關：
-a, --archive-headers Display archive header information
顯示歸檔的頭部資訊。
-f, --file-headers Display the contents of the overall file header
顯示整個檔案頭的內容。
-p, --private-headers Display object format specific file header contents
顯示 目標格式說明的檔案的頭的內容。
-h, --[section-]headers Display the contents of the section headers
顯示段頭的內容。
-x, --all-headers Display the contents of all headers
顯示所有頭部的內容。
-d, --disassemble Display assembler contents of executable sections
顯示可執行段的彙編內容。
-D, --disassemble-all Display assembler contents of all sections
顯示所有段的彙編內容。
-S, --source Intermix source code with disassembly
將原始碼混插在彙編指令間。
-s, --full-contents Display the full contents of all sections requested
顯示所有請求段的內容。
-g, --debugging Display debug information in object file
顯示目標檔案中的除錯資訊。
-e, --debugging-tags Display debug information using ctags style
顯示ctag風格的除錯資訊。
-G, --stabs Display (in raw form) any STABS info in the file
(以原始的格式)顯示檔案中任何 STABS。
-W, --dwarf Display DWARF info in the file
顯示檔案中 DWARF資訊。
-t, --syms Display the contents of the symbol table(s)
顯示符號表的內容。
-T, --dynamic-syms Display the contents of the dynamic symbol table
顯示動態符號表的內容。
-r, --reloc Display the relocation entries in the file
顯示檔案中重定位入口。
-R, --dynamic-reloc Display the dynamic relocation entries in the file
顯示檔案中的動態重定位入口。
@<file> Read options from <file>
從file 中讀取選項。
-v, --version Display this program's version number
顯示 objdump程式的版本號（vsersion number :vn）。
-i, --info List object formats and architectures supported
列出objdump所支援的 目標格式，和體系結構。
-H, --help Display this information
顯示這個幫助資訊。
The following switches are optional: //下面的開關選項是可選的
-b, --target=BFDNAME Specify the target object format as BFDNAME
用BFDNAME 指出目標檔案的格式。
-m, --architecture=MACHINE Specify the target architecture as MACHINE
用MACHINE指出目標檔案的體系架構。
-j, --section=NAME Only display information for section NAME
只顯示段名為NAME的段的資訊。
-M, --disassembler-options=OPT Pass text OPT on to the disassembler
將文字 OPT 傳遞給反彙編器。
-EB --endian=big Assume big endian format when disassembling
以大端模式進行反彙編。
-EL --endian=little Assume little endian format when disassembling
以小段模式進行反彙編。
--file-start-context Include context from start of file (with -S)
包含檔案的開始內容。
-I, --include=DIR Add DIR to search list for source files
在原始檔的搜尋表中新增 DIR。
-l, --line-numbers Include line numbers and filenames in output
在輸出中包含原始檔名和行號。
-C, --demangle[=STYLE] Decode mangled/processed symbol names
The STYLE, if specified, can be `auto', `gnu',
`lucid', `arm', `hp', `edg', `gnu-v3', `java'
or `gnat'
解碼校正過的/處理過的符號名。 STYLE 可以指派為 atuo, gnu
lucid, arm, hp, edg, gnu-v3, java, 或者 gnat.
-w, --wide Format output for more than 80 columns
格式化行輸出大於80列的輸出。
-z, --disassemble-zeroes Do not skip blocks of zeroes when disassembling
反彙編時， 不跳過全0的段。
--start-address=ADDR Only process data whose address is >= ADDR
僅當地址不小於ADDR時，開始處理資料。或者說從ADDR開始處理資料。
--stop-address=ADDR Only process data whose address is <= ADDR
僅處理地址不大於ADDR的資料。或者說到地址為ADDR時，結束資料處理。
--prefix-addresses Print complete address alongside disassembly
與反彙編指令一起，列印完整的地址。
--[no-]show-raw-insn Display hex alongside symbolic disassembly
與反彙編指令一起顯示十六進位制格式的指令。
--adjust-vma=OFFSET Add OFFSET to all displayed section addresses
將所有要顯示的段的段地址加上OFFSET。
--special-syms Include special symbols in symbol dumps
在符號表轉儲時，包括特殊的符號。
objdump: supported targets: elf64-x86-64 elf32-i386 a.out-i386-linux efi-app-ia32 elf64-little
elf64-big elf32-little elf32-big srec symbolsrec tekhex binary ihex
objdump: 支援的目標檔案格式：elf64-x86-64 elf32-i386 a.out-i386-linux efi-app-ia32 elf64-little
elf64-big elf32-little elf32-big srec symbolsrec tekhex binary ihex
objdump: supported architectures: i386 i386:x86-64 i8086 i386:intel i386:x86-64:intel
objdump：支援的體系結構：i386 i386:x86-64 i8086 i386:intel i386:x86-64:intel
Report bugs to <URL:http://www.sourceware.org/bugzilla/> and
OBJDUMP(1) GNU Development Tools OBJDUMP(1)
objdump GNU開發工具 objdump
NAME
objdump - display information from object files.
objdump - 顯示來自目標檔案中資訊。
//用法概要
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]
[-e│--debugging-tags]
[-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]
[-W│--dwarf]
[-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]
[--special-syms]
[-V│--version]
[-H│--help]
objfile...
DESCRIPTION // 功能描述
objdump displays information about one or more object files. The
options control what particular information to display. This informa-
tion 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.
objdump 顯示關於一個或多個目標檔案（object file）的資訊。選項控制指定的資訊的顯示。
這些資訊對專注於編譯工具的程式設計師非常有用，對於那些只想讓程式編譯並執行的程式設計師來說沒有幾乎沒有什麼幫助。
objfile ... 指的是要驗證檢查的目標檔案（object file）的列表。當你指派了一個歸檔包，objdump 顯示包中每一個
目標檔案的相關資訊。
OPTIONS // 選項
The long and short forms of options, shown here as alternatives, are
equivalent. At least one option from the list
-a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-r,-R,-s,-S,-t,-T,-V,-x must be given.
這兒顯示的供選擇的長格式和短格式的命令選項，是等效的。 選項列表
-a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-r,-R,-s,-S,-t,-T,-V,-x中選項至少有一個給出。
-a //短格式
--archive-header //長格式
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.
如果目標檔案列表中的有歸檔檔案，顯示歸檔檔案的頭資訊（header information）
(顯示格式與 ls -l 顯示的類似)。 除了顯示你能夠用命令 ar tv 顯示的資訊外，objdump -a
能夠顯示歸檔包中每個成員的目標檔案的格式。
--adjust-vma=offset //調整虛擬記憶體地址
When dumping information, first add offset to all the section
addresses. This is useful if the section addresses do not corre-
spond 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.
當轉儲資訊時， 首先，將偏移量offset加到所有的段地址。如果段地址（section address）與符號表（symbol table）不一致時是非常有用的。
這種不一致發生在將段放在指定的地址，即使用這樣不能代表段地址的格式，如， a.out 格式。
-b bfdname // binary file description name
--target=bfdname
Specify that the object-code format for the object files is bfd-
name. This option may not be necessary; objdump can automatically
recognize many formats.
指派給目標檔案的目標編碼格式是 bfdname。這個選項可能沒有什麼用； objdump 能夠自動地識別許多格式。
For example, // 例如
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.
例如,
objdump -b oasys -m vax -h fu.o
顯示目標檔案fu.o的段頭部(-h選項的作用)的概要資訊，顯式地標記為(-m選項) VAX目標檔案用Oasys編譯器產生的格式。
你能夠通過objdump -i 列出所有可用的格式。
-C
--demangle[=style] //命名的矯正
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 com-
piler.
將low-level（低階的）符號名轉化為 user-level（使用者級）符號名。
除了去除系統初始化預先追加的下劃線外，還能使C++的函式名可讀。 不同編譯器有不同的矯正風格。
可選的矯正風格引數用來為你的編譯器選擇合適的恰當的矯正風格。
-g
--debugging //除錯資訊
Display debugging information. This attempts to parse debugging
information stored in the file and print it out using a C like syn-
tax. Only certain types of debugging information have been imple-
mented. Some other types are supported by readelf -w.
顯示除錯資訊。objdump 在這個選項下嘗試解析儲存在目標檔案中的除錯資訊並使用C風格的語法將其列印。
只有部分型別的除錯資訊被實現。命令readelf -w 支援其他型別的除錯資訊。
-e
--debugging-tags //除錯標記
Like -g, but the information is generated in a format compatible
with ctags tool.
和-g選項類似，但是 產生一種與 ctags tool工具相容的格式。
-d
--disassemble //反彙編
Display the assembler mnemonics for the machine instructions from
objfile. This option only disassembles those sections which are
expected to contain instructions.
顯示目標檔案中的機器指令的彙編助記符。-d這個選項只能反彙編那些被認為包含一些指令的段。
-D
--disassemble-all //全部反彙編
Like -d, but disassemble the contents of all sections, not just
those expected to contain instructions.
與-d 選項類似， 但是對所有的段的內容都進行反彙編，而不僅僅是那些被認為包含某些指令的段。
--prefix-addresses //字首地址
When disassembling, print the complete address on each line. This
is the older disassembly format.
當反彙編時，每行都列印完整地址。這是舊的反彙編格式。
-EB
-EL
--endian={big│little} //端模式 : 大端、小端
Specify the endianness of the object files. This only affects dis-
assembly. This can be useful when disassembling a file format
which does not describe endianness information, such as S-records.
指派目標檔案的端模式。這隻影響反彙編。這是非常有用的當反會彙編一個檔案格中沒有描述
端資訊的檔案時， 如 S-records。
-f
--file-headers //檔案頭部
Display summary information from the overall header of each of the
objfile files.
顯示來自所有目標檔案的頭部的資訊彙總。
--file-start-context //檔案的起始內容
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.
當從一個沒有被顯示的檔案中交叉顯示 source code(原始碼)/反彙編（assumes -S），可以擴充套件內容到檔案的開始。
-h
--section-headers // 段頭部
--headers
Display summary information from the section headers of the object
file.
顯示目標檔案的段頭部的概要資訊。
File segments may be relocated to nonstandard addresses, for exam-
ple 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.
檔案的段可能重定位到那種非標準地址，例如， 用選項-Ttext -Tdata or -Tbss給ld。
然而，某些目標檔案格式，如 a.out，沒有儲存目標檔案的的段起始地址。 這種情況下，儘管ld能夠
正確地重定位段， 但是使用objdump -h 列出檔案的段的頭部卻不能顯示正確的地址。相反，objdump -h
顯示那種在目的碼中隱式的通用地址。
-H
--help //幫助
Print a summary of the options to objdump and exit.
列印objdump 的選項概要，然後退出。
-i
--info
Display a list showing all architectures and object formats avail-
able for specification with -b or -m.
顯示對目標檔案可用的給選項-b 或者-m的指派選項和所有的體系結構(architecture)的列表。
-j name
--section=name
Display information only for section name.
//只顯示指定段名（name）的段的資訊。
-l
--line-numbers //行號
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.
用與目標檔案或者從定位的檔案的一致的原始檔檔名和原始檔的行號標記顯示的資訊（用除錯資訊）。
僅當使用選項-d -D ， or -r 選項時 -l才有用。
-m machine
--architecture=machine //系統的體系結構
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.
當反彙編目標檔案時， 指派使用的體系結構。
當反彙編那些沒有描述體系結構資訊的的目標檔案，如S-records， 是非常有用的。
你能夠列出所有支援的體系結構，用選項-i。
-M options
--disassembler-options=options
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 -M options can be used or can be placed together into a comma separated list.
將目標的規格說明資訊傳給反彙編器。僅支援一些目標檔案。 如果有必要指派多於一個的反彙編器選項，那麼多個-M
選項可以使用，也可以將多個選項放在一個逗號(comma)分隔的列表中。
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-names-std (the default) will select the register
names as used in ARM’s instruction set documentation, but with reg-
ister 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.
如過目標架構是一個ARM體系結構，那麼這個開關能夠用來選擇暫存器名字集被反彙編器使用。
指派 -M reg-name-std (預設值) 將選擇在ARM指令集文件中使用的暫存器的名字。但是 register 13
稱之為sp， register 14 稱之為 lr，並且register 15 稱為 pc。指派 -M reg-names-apcs 將選擇名字集被
ARM Procedure Call Stands。 當-M reg-names-raw, 將使用rn(n為暫存器的編號)。
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 names or the special register
names).
還有兩個關於APCS暫存器的命名模式分別用-M reg-names-atpcs 和 -M reg-names-special-atpcs，
它使用ARM/Thumb procedure Call Standard 命名規範。要麼使用正常的暫存器名字，要麼使用特殊的暫存器名字。
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.
這個選項能夠用來強制彙編器解釋所有的指令解釋為Thumb指令，通過開關選項 --disassembler-options=force-thumb,
在ARM體系結構下。當嘗試反彙編器其他編譯器生成的thumb code，非常有用。
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 architec-
ture. intel and att select between intel syntax mode and AT&T syn-
tax mode. addr32, addr16, data32 and data16 specify the default
address size and operand size. These four options will be overrid-
den if x86-64, i386 or i8086 appear later in the option string.
Lastly, suffix, when in AT&T mode, instructs the disassembler to
print a mnemonic suffix even when the suffix could be inferred by
the operands.
對於x86架構， 一些選項重複了 -m 開關選項的功能，但是允許更精細的粒度控制。 多個一起的選項指派為逗號分隔的字串。
x86-64, i386 and i8086為指定的架構選擇反彙編器。 intel 和att 選擇intel語法模式和AT&T語法模式，
addr32， addr16， data32 和data16 指派預設的地址大小和運算元大小。這四個選項將被覆蓋，如果後續的選項串中出現了
x86-64, i386 or i8086。最後， 當使用AT&T模式時，字尾將指導反彙編器列印助記符字尾，甚至當字尾被運算元干擾。
For PPC, booke, booke32 and booke64 select disassembly of BookE
instructions. 32 and 64 select PowerPC and PowerPC64 disassembly,
respectively. e300 selects disassembly for the e300 family.
對於ppc，booke， booke32 和booke64選擇反彙編 Booke的指令。32，64響應地選擇PowerPC
和PowerPC64，反彙編. e300 選擇e300指令集的反彙編。
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:
對於MIPS， 這個選項控制指令助記符名字和暫存器名字在反彙編指令中的列印。多個選項能夠被指派到一個用逗號分割的字串。
無效的選項被忽略。
"no-aliases" //無別名
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.
列印原始（raw）的的指令助記符 而不是偽指令助記符。 例如， 列印 daddu 或者or指令 而不是
move， 列印sll而不是 nop指令，等等。
"gpr-names=ABI"
Print GPR (general-purpose register) names as appropriate for
the specified ABI. By default, GPR names are selected accord-
ing to the ABI of the binary being disassembled.
列印GPR（通用暫存器）的名字作為適合於指派的ABI。 預設情況下， GPR名字的選擇有
反彙編的二進位制檔案的ABI決定的。
"fpr-names=ABI"
Print FPR (floating-point register) names as appropriate for
the specified ABI. By default, FPR numbers are printed rather
than names.
列印FPR（浮點暫存器）名字作為適合於指定的ABI。 預設的情況下，列印FPR編號而不是名字。
"cp0-names=ARCH"
Print CP0 (system control coprocessor; coprocessor 0) register
names as appropriate for the CPU or architecture specified by
ARCH. By default, CP0 register names are selected according to
the architecture and CPU of the binary being disassembled.
列印 CP0 (系統控制協處理器：協處理器 0）暫存器名字適合於ARCH指派的CPU或者體系結構。
預設地情況下， CP0暫存器的名字將要反彙編的的二進位制的檔案的cpu和體系結構。
"hwr-names=ARCH"
Print HWR (hardware register, used by the "rdhwr" instruction)
names as appropriate for the CPU or architecture specified by
ARCH. By default, HWR names are selected according to the
architecture and CPU of the binary being disassembled.
列印 HWR (硬體暫存器， used by the "rdhwr" 指令)名字 適合於CPU或者被ARCH指派的體系結構。
預設的情況下， HWR 名字根據將要反彙編的二進位制檔案的的cpu和體系結構來選擇。
"reg-names=ABI"
Print GPR and FPR names as appropriate for the selected ABI.
列印 GPR 和 FPR 的名字 並適合於所選擇的ABI.
"reg-names=ARCH"
Print CPU-specific register names (CP0 register and HWR names)
as appropriate for the selected CPU or architecture.
列印 CPU專用的寄存名字（CP0 暫存器和HWR 名字）與所選的CPU 或者體系結構相適應。
For any of the options listed above, ABI or ARCH may be specified
as numeric to have numbers printed rather than names, for the
selected types of registers. You can list the available values of
ABI and ARCH using the --help option.
對於任何一個上面列出來的選項， ABI 或者 ARCH 指派為數值，對於所選的型別的暫存器，列印數字而不是名字。
你能通過--help選項列出所有可用的ABI 和ARCH的值。
For VAX, you can specify function entry addresses with -M
entry:0xf00ba. You can use this multiple times to properly disas-
semble 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.
對於 VAX， 你能指派函式的入口地址 用選項 -M entry:0xf00BA. 你可以使用多次來反彙編那些不包含
符號表（如rom dumps）的VAX 二進位制檔案。 在這些情況下， 函式入口標記否則被解碼為VAX的指令，將導致函式後續的
的部分反彙編錯誤。
-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.
列印指派給目標檔案格式的的資訊。 列印的具體資訊依賴於目標檔案的格式。
對於一些目標檔案格式， 沒有附加的資訊被列印。
-r
--reloc
Print the relocation entries of the file. If used with -d or -D,
the relocations are printed interspersed with the disassembly.
列印檔案入口的重定位資訊。 如果使用了 -d 或者-D選項重定位資訊將分散在反彙編中顯示。
-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.
顯示檔案的動態重定位入口。這隻對動態的目標檔案有意義，如一些型別的共享庫。
-s
--full-contents
Display the full contents of any sections requested. By default
all non-empty sections are displayed.
顯示指定的任何段的全部內容。預設情況下， 顯示所有的非空段。
-S
--source
Display source code intermixed with disassembly, if possible.
Implies -d.
儘可能地， 將原始碼混合地顯示在反彙編的指令中。 意味著使用了-d選項。
--show-raw-insn
When disassembling instructions, print the instruction in hex as
well as in symbolic form. This is the default except when --pre-
fix-addresses is used.
當反彙編指令時，同時以十六進位制和符號的形式列印指令。 這是預設的列印方式，除非當使用了 --prefix-addresses選項。
--no-show-raw-insn
When disassembling instructions, do not print the instruction
bytes. This is the default when --prefix-addresses is used.
當反彙編指令時， 不列印指令位元組。 這是預設的方式，在使用了 --prefix-address.
-W
--dwarf
Displays the contents of the DWARF debug sections in the file, if
any are present.
顯示檔案中DWARF除錯段的內容，如果存在的話。
-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.
顯示請求段的所有內容。在ELF檔案中顯示.stab .stab.index .stab.excl段的內容。
這個選項僅對那些將 .stab 除錯符號表入口裝入到 ELF段的系統（如 Solaris 2.0）上有用。
在其他的大多數檔案格式中， 除錯符號表入口穿插在連線符號中，可以顯示在 --syms 選項下的輸出。
--start-address=address
Start displaying data at the specified address. This affects the
output of the -d, -r and -s options.
從指定的地址開始顯示資料。 這個選項將影響到 -d, -r, 和-s選項的輸出。
--stop-address=address
Stop displaying data at the specified address. This affects the
output of the -d, -r and -s options.
到指定的地址時，停止顯示資料。 這個選項將影響到 -d, -r, 和-s選項的輸出。
-t
--syms
Print the symbol table entries of the file. This is similar to the
information provided by the nm program.
列印檔案的符號表入口。這個選項的顯示資訊與nm程式顯示的資訊類似。
-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.
列印檔案的動態符號表的入口。這個選項只對動態目標檔案（如某些型別的共享庫）有意義。
這個選項的輸出資訊和nm程式在指定選項 -D(--dynamic)的輸出類似。
--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.
當顯示的符號包含一些對目標檔案來說子啊某些方面特殊的符合和那些在使用者通常情況下不感興趣的符合。
-V
--version
Print the version number of objdump and exit.
列印objdump的版本號 並退出。
-x
--all-headers
Display all available header information, including the symbol ta-
ble and relocation entries. Using -x is equivalent to specifying
all of -a -f -h -p -r -t.
顯示所有的可用頭資訊， 包括符號表和重定位的入口。使用-x選項等效於同時指派了
-a，-f， -h， -p, -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 dis-
played.
格式化那些輸出裝置超過80列的行。 當它們顯示的時候，不截斷符號名。
-z
--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.
正常情況下，反彙編的輸出會跳過全0的塊。 這個選項將指導反彙編器反彙編的這些全0的塊，像
其他的資料。
@file
Read command-line options from file. The options read are inserted
in place of the original @file option. If file does not exist, or
cannot be read, then the option will be treated literally, and not
removed.
從檔案讀取命令列選項。 讀取的選項插入到原始的@file選項的位置並代替@file選項。
如果檔案不存在或者沒有讀許可權，那麼這個選項將按字面值對待，而不是去除。
Options in file are separated by whitespace. A whitespace charac-
ter 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 file may itself contain additional
@file options; any such options will be processed recursively.
檔案中選項以空白符分隔（\n \t ' '）. 可以通過用單引號或者雙引號括住帶有空白符的選項。
任何字元（包括\）通過前導的轉義字元\, 都能包含進來，檔案自身可能包含附加的@file選項，任何這樣
的選項將用同樣的方式遞迴處理。
SEE ALSO //參閱
nm(1), readelf(1), and the Info entries for binutils.
nm， readelf，並通過 info 這二進位制工具實體。
COPYRIGHT // 版權 NOT COPTLEFT
Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001, 2002, 2003, 2004, 2005, 2006 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".
binutils-2.17.50.0.6-14.el5 2010-03-31 OBJDUMP(1)
Linux manual：
OBJDUMP(1) GNU Development Tools OBJDUMP(1)
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]
[-e│--debugging-tags]
[-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]
[-W│--dwarf]
[-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]
[--special-syms]
[-V│--version]
[-H│--help]
objfile...
DESCRIPTION
objdump displays information about one or more object files. The
options control what particular information to display. This informa-
tion 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,-e,-f,-g,-G,-h,-H,-p,-r,-R,-s,-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 corre-
spond 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 bfd-
name. 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 com-
piler.
-g
--debugging
Display debugging information. This attempts to parse debugging
information stored in the file and print it out using a C like syn-
tax. Only certain types of debugging information have been imple-
mented. Some other types are supported by readelf -w.
-e
--debugging-tags
Like -g, but the information is generated in a format compatible
with ctags tool.
-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.
-EB
-EL
--endian={big│little}
Specify the endianness of the object files. This only affects dis-
assembly. This can be useful when disassembling a file format
which does not describe endianness information, such as S-records.
-f
--file-headers
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-headers
--headers
Display summary information from the section headers of the object
file.
File segments may be relocated to nonstandard addresses, for exam-
ple 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.
-H
--help
Print a summary of the options to objdump and exit.
-i
--info
Display a list showing all architectures and object formats avail-
able 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 sup-
ported on some targets. If it is necessary to specify more than
one disassembler option then multiple -M options can be used or can
be placed together into a comma separated list.
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-names-std (the default) will select the register
names as used in ARM’s instruction set documentation, but with reg-
ister 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 names 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 architec-
ture. intel and att select between intel syntax mode and AT&T syn-
tax mode. addr32, addr16, data32 and data16 specify the default
address size and operand size. These four options will be overrid-
den if x86-64, i386 or i8086 appear later in the option string.
Lastly, suffix, when in AT&T mode, instructs the disassembler 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. e300 selects disassembly for the e300 family.
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:
"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.
"gpr-names=ABI"
Print GPR (general-purpose register) names as appropriate for
the specified ABI. By default, GPR names are selected accord-
ing to the ABI of the binary being disassembled.
"fpr-names=ABI"
Print FPR (floating-point register) names as appropriate for
the specified ABI. By default, FPR numbers are printed rather
than names.
"cp0-names=ARCH"
Print CP0 (system control coprocessor; coprocessor 0) register
names as appropriate for the CPU or architecture specified by
ARCH. By default, CP0 register names are selected according to
the architecture and CPU of the binary being disassembled.
"hwr-names=ARCH"
Print HWR (hardware register, used by the "rdhwr" instruction)
names as appropriate for the CPU or architecture specified by
ARCH. By default, HWR names are selected according to the
architecture and CPU of the binary being disassembled.
"reg-names=ABI"
Print GPR and FPR names as appropriate for the selected ABI.
"reg-names=ARCH"
Print CPU-specific register names (CP0 register and HWR names)
as appropriate for the selected CPU or architecture.
For any of the options listed above, ABI or ARCH may be specified
as numeric to have numbers printed rather than names, for the
selected types of registers. You can list the available values of
ABI and ARCH using the --help option.
For VAX, you can specify function entry addresses with -M
entry:0xf00ba. You can use this multiple times to properly disas-
semble 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.
-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. By default
all non-empty sections are displayed.
-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 --pre-
fix-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.
-W
--dwarf
Displays the contents of the DWARF debug sections in the file, if
any are present.
-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.
--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.
-V
--version
Print the version number of objdump and exit.
-x
--all-headers
Display all available header information, including the symbol ta-
ble and relocation entries. Using -x is equivalent to specifying
all of -a -f -h -p -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 dis-
played.
-z
--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.
@file
Read command-line options from file. The options read