$ nm -A libjpeg.a
libjpeg.a:jcapimin.o:00000330 T jpeg_CreateCompress
libjpeg.a:jcapimin.o: U jpeg_abort
libjpeg.a:jcapistd.o: U jinit_compress_master
libjpeg.a:jcapistd.o:000001b0 T jpeg_start_compress
libjpeg.a:jctrans.o:000000c0 t compress_output
libjpeg.a:jctrans.o: U jinit_c_master_control
libjpeg.a:jcparam.o:000008a0 t add_huff_table
libjpeg.a:jcparam.o:000000e2 r bits_ac_chrominance.3846
... 파일별로 반복
'
U,T,r 등은 symbol type 이라고 하며,
위의 U는 Undefined 을, T는 Text section(code) 을 의미한다.
$ nm --help
Usage: nm [option(s)] [file(s)]
List symbols in [file(s)] (a.out by default).
The options are:
-a, --debug-syms Display debugger-only symbols
-A, --print-file-name Print name of the input file before every symbol
-B Same as --format=bsd
-C, --demangle[=STYLE] Decode low-level symbol names into user-level names
The STYLE, if specified, can be `auto' (the default),
`gnu', `lucid', `arm', `hp', `edg', `gnu-v3', `java'
or `gnat'
--no-demangle Do not demangle low-level symbol names
-D, --dynamic Display dynamic symbols instead of normal symbols
--defined-only Display only defined symbols
-e (ignored)
-f, --format=FORMAT Use the output format FORMAT. FORMAT can be `bsd',
`sysv' or `posix'. The default is `bsd'
-g, --extern-only Display only external symbols
-l, --line-numbers Use debugging information to find a filename and
line number for each symbol
-n, --numeric-sort Sort symbols numerically by address
-o Same as -A
-p, --no-sort Do not sort the symbols
-P, --portability Same as --format=posix
-r, --reverse-sort Reverse the sense of the sort
-S, --print-size Print size of defined symbols
-s, --print-armap Include index for symbols from archive members
--size-sort Sort symbols by size
--special-syms Include special symbols in the output
--synthetic Display synthetic symbols as well
-t, --radix=RADIX Use RADIX for printing symbol values
--target=BFDNAME Specify the target object format as BFDNAME
-u, --undefined-only Display only undefined symbols
-X 32_64 (ignored)
@FILE Read options from FILE
-h, --help Display this information
-V, --version Display this program's version number
DESCRIPTION
GNU nm lists the symbols from object files objfile.... If no object files are listed as argu-
ments, nm assumes the file a.out.
For each symbol, nm shows:
o The symbol value, in the radix selected by options (see below), or hexadecimal by default.
o The symbol type. At least the following types are used; others are, as well, depending on
the object file format. If lowercase, the symbol is local; if uppercase, the symbol is
global (external).
"A" The symbol's value is absolute, and will not be changed by further linking.
"B"
"b" The symbol is in the uninitialized data section (known as BSS).
"C" The symbol is common. Common symbols are uninitialized data. When linking, multiple
common symbols may appear with the same name. If the symbol is defined anywhere, the
common symbols are treated as undefined references.
"D"
"d" The symbol is in the initialized data section.
"G"
"g" The symbol is in an initialized data section for small objects. Some object file formats
permit more efficient access to small data objects, such as a global int variable as
opposed to a large global array.
"I" The symbol is an indirect reference to another symbol. This is a GNU extension to the
a.out object file format which is rarely used.
"i" The symbol is in a section specific to the implementation of DLLs.
"N" The symbol is a debugging symbol.
"p" The symbols is in a stack unwind section.
"R"
"r" The symbol is in a read only data section.
"S"
"s" The symbol is in an uninitialized data section for small objects.
"T"
"t" The symbol is in the text (code) section.
"U" The symbol is undefined.
"V"
"v" The symbol is a weak object. When a weak defined symbol is linked with a normal defined
symbol, the normal defined symbol is used with no error. When a weak undefined symbol is
linked and the symbol is not defined, the value of the weak symbol becomes zero with no
error. On some systems, uppercase indicates that a default value has been specified.
"W"
"w" The symbol is a weak symbol that has not been specifically tagged as a weak object sym-
bol. When a weak defined symbol is linked with a normal defined symbol, the normal
defined symbol is used with no error. When a weak undefined symbol is linked and the
symbol is not defined, the value of the symbol is determined in a system-specific manner
without error. On some systems, uppercase indicates that a default value has been speci-
fied.
"-" The symbol is a stabs symbol in an a.out object file. In this case, the next values
printed are the stabs other field, the stabs desc field, and the stab type. Stabs sym-
bols are used to hold debugging information.
"?" The symbol type is unknown, or object file format specific.
$ ar -t libjpeg.a
jcapimin.o
jcapistd.o
jctrans.o
jcparam.o
jdatadst.o
...
$ ar --help
Usage: ar [emulation options] [-]{dmpqrstx}[abcfilNoPsSuvV] [member-name] [count] archive-file file...
ar -M [<mri-script]
commands:
d - delete file(s) from the archive
m[ab] - move file(s) in the archive
p - print file(s) found in the archive
q[f] - quick append file(s) to the archive
r[ab][f][u] - replace existing or insert new file(s) into the archive t - display contents of archive
x[o] - extract file(s) from the archive
command specific modifiers:
[a] - put file(s) after [member-name]
[b] - put file(s) before [member-name] (same as [i])
[N] - use instance [count] of name
[f] - truncate inserted file names
[P] - use full path names when matching
[o] - preserve original dates
[u] - only replace files that are newer than current archive contents
generic modifiers:
[c] - do not warn if the library had to be created
[s] - create an archive index (cf. ranlib)
[S] - do not build a symbol table
[T] - make a thin archive
[v] - be verbose
[V] - display the version number
@<file> - read options from <file>
emulation options:
No emulation specific options
ar: supported targets: elf32-i386 a.out-i386-linux efi-app-ia32
efi-bsdrv-ia32 efi-rtdrv-ia32 elf32-little elf32-big elf64-x86-64
efi-app-x86_64 efi-bsdrv-x86_64 efi-rtdrv-x86_64 elf64-little elf64-big
srec symbolsrec tekhex binary ihex trad-core
Report bugs to <http://www.sourceware.org/bugzilla/>
Sections:
SYMBOL TABLE:
RELOCATION RECORDS FOR [.text]:
... 파일별로 반복
$ objdump --help
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
-F, --file-offsets Include file offsets when displaying information
-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
The following i386/x86-64 specific disassembler options are supported for use
with the -M switch (multiple options should be separated by commas):
x86-64 Disassemble in 64bit mode
i386 Disassemble in 32bit mode
i8086 Disassemble in 16bit mode
att Display instruction in AT&T syntax
intel Display instruction in Intel syntax
att-mnemonic
Display instruction in AT&T mnemonic
intel-mnemonic
Display instruction in Intel mnemonic
addr64 Assume 64bit address size
addr32 Assume 32bit address size
addr16 Assume 16bit address size
data32 Assume 32bit data size
data16 Assume 16bit data size
suffix Always display instruction suffix in AT&T syntax
Report bugs to <http://www.sourceware.org/bugzilla/>.
mangling은 컴파일러에서 이름이 중복되지 않도록 독특한 이름을 지어주는 것으로
C++에서 overloading을 지원하기 하는데 사용되기도 한다고 한다. [링크 : http://rubyeye.kr/]
int _cdecl f (int x) { return 0; } // _f
int _stdcall g (int y) { return 0; } // _g@4
int _fastcall h (int z) { return 0; } // @h@4
$ c++filt --help
Usage: c++filt [options] [mangled names]
Options are:
[-_|--strip-underscore] Ignore first leading underscore
[-n|--no-strip-underscore] Do not ignore a leading underscore (default)
[-p|--no-params] Do not display function arguments
[-i|--no-verbose] Do not show implementation details (if any)
[-t|--types] Also attempt to demangle type encodings
[-s|--format {none,auto,gnu,lucid,arm,hp,edg,gnu-v3,java,gnat}]
[@<file>] Read extra options from <file>
[-h|--help] Display this information
[-v|--version] Show the version information
Demangled names are displayed to stdout.
If a name cannot be demangled it is just echoed to stdout.
If no names are provided on the command line, stdin is read.
Report bugs to <http://www.sourceware.org/bugzilla/>.
To install Vim on Debian Linux (GNU Linux), login as root and when connected to internet type -
apt-get install vim vim-rt
It will download the latest version of vim, install it, configure
it. The first package listed is vim, the standard editor, compiled with
X11 support, vim-rt is the vim runtime, it holds all the syntax and
help files.
On Debian 3.0 (woody) and above, use 'apt-get install vim' instead. The vim-rt package is part of the main vim package.
간만에 자전거 타고 싶어져서, 주말을 이용해 시내를 누벼보았다.
주로 가는 코스는 한강공원 자전거 길을 이용하기 때문에, 그리고 지하철만 타기에 시내가 궁금해진것도 있고,
가장 큰 이유는 "동대문운동장까지 한번 가보고 싶어!" 였다.
아무튼 간만에 타려니 자전거에 바람도 넣어 주고 그래야 하는 관계로..
단골집에 들러서 바람도 넣고, 밤이 다가오니 라이트도 사야하고.. (실은 있었는데 배터리만 도망갔다.. OTL)
그런 이유로 다시 돌아가기도 번거롭고, 길도 모르는데 무작정 가다보면 나오겠지~ 하는 무대뽀 정신으로 밀어 붙였다.
난코스 - 올림픽대교
강변 CGV 갈때 마을버스 타고 지나가면서 자전거는 힘들겠네.. 라고 생각했지만 이거 웬걸 -ㅁ-!
은근슬쩍 경사도 장난이 아니고, 바람도 장난이 아닌데...
차들 속도가 더욱 장난이 아니다 -ㅁ-!
횡단보도는 있긴있는데.. 솔찍히 보행자 입장에서 도무지.. 횡단할수 없는 횡단보도이다.
아무튼, 다음번에는 광진대교로 건너서 이번에 간 코스로 가보던가, 아니면 다른 골목으로 가도록 해봐야겠다 +_+
(아직 아차산을 건널 힘은 ... OTL)
