如何列出一个.so文件中的符号
如何列出从.so文件被导出的符号。如果可能的话,我也想知道它们的来源(例如,如果它们在从静态库拉)。
How do list the symbols being exported from a .so file. If possible, I'd also like to know their source (e.g. if they are pulled in from a static library).
我用gcc 4.0.2,如果有差别
I'm using gcc 4.0.2, if that makes a difference
有关上市符号的标准工具是纳米
,你可以使用它只是这样的:
The standard tool for listing symbols is nm
, you can use it simply like this:
nm -g yourLib.so
如果你想看到一个C ++库,添加-C选项,还原函数符号的符号(这是更具可读性demangled)。
If you want to see symbols of a C++ library, add the "-C" option which demangle the symbols (it's far more readable demangled).
nm -gC yourLib.so
如果您的.so文件是ELF格式,你有两个选择:
If your .so file is in elf format, you have two options:
为 objdump的
( -C
也是还原C ++有用):
Either objdump
(-C
is also useful for demangling C++):
$ objdump -TC libz.so
libz.so: file format elf64-x86-64
DYNAMIC SYMBOL TABLE:
0000000000002010 l d .init 0000000000000000 .init
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.2.5 free
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.2.5 __errno_location
0000000000000000 w D *UND* 0000000000000000 _ITM_deregisterTMCloneTable
或者使用 readelf
:
$ readelf -Ws libz.so
Symbol table '.dynsym' contains 112 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000002010 0 SECTION LOCAL DEFAULT 10
2: 0000000000000000 0 FUNC GLOBAL DEFAULT UND free@GLIBC_2.2.5 (14)
3: 0000000000000000 0 FUNC GLOBAL DEFAULT UND __errno_location@GLIBC_2.2.5 (14)
4: 0000000000000000 0 NOTYPE WEAK DEFAULT UND _ITM_deregisterTMCloneTable