locating default signal handler for SIGSEGV

[Devrat Mittal <u02113 () cs unipune ernet in>]

hi ppl,
Can anyone tell me how can I locate the signal handler for SIGSEGV,
so that I can call it directly. The reason: I have a proftpd-1.2.7 binary, 
on which I am using the proftpd \n processing bug exploit, & i am trying 
to locate the correct offset (ret address) for it. So the daemon does do a 
segfault & it has a handler installed for it. So it displays

Proftpd terminating (signal 11)...

Problem is I cant run the code under gdb as the segfault fails to occur if 
i debug the binary, further i cant recompile the binary at all as that 
also changes addresses & the segfault fails to occur. My goal is to 
somehow call the default signal handler (to get a core dump) & then 
analyze the program to see where the shellcode was placed. 

Plz help me coz there aint no hackers here whom i can consult.


-- 
Devrat Mittal
M.tech 2nd year
Department of computer Science, 
Pune University, 
Pune, 
India.