How to know definition is present or not?

Pramoda.M.A · 05-27-2009, 04:13 AM

Hi All,

Say, i have librayr file or shared object file. I need to know, required function's definition is present in the .a file/.so file. Is it possible?
If possible, how to?
It is like, GetProcAddress() in Windows.
Please anybody help me.

colucix · 05-27-2009, 04:20 AM

You can use

Code:

grep -w function_name file.so

It will not show you the matching lines (since they are binary files) but it will tell you if it matches.

Pramoda.M.A · 05-28-2009, 12:50 AM

It is not working...

nilathinesh · 05-28-2009, 12:55 AM

Quote:

if the .so is for intel processor then..

try

nm file.so |grep function_name

otherwise use the appropriate compiler-nm and try

it is wrong answer, i mis-recognized as ".o" file.. and post the correct answer if i am getting.

chrism01 · 05-28-2009, 02:05 AM

To check if a library is called by a program

Code:

ldd program | grep libname

check if specific fn or file is used in program (or lib file)

Code:

strings program |  grep <fn_name>

Also

man readelf
man od

nilathinesh · 05-28-2009, 06:01 AM

i got the answer for my other question posted here in

software-kernel

http://www.linuxquestions.org/questi...number-726180/

i tried

Code:

strings bridgedriver.ko |grep vermagic

this returned me the version of the kernel using which the ko is built..

Thanks chrism01