longjmp crash

[Elena Labruna]

I'm working with a C package written by other
on a linux machine with kernel version 2.2.14,
and gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release).

In the software periodically is called a :

setjmp(_ckpt_env) 


One program that use this package can be stopped and if it is restarted 
is called a:

longjmp(_ckpt_env, 1);

to restore the stack.

In my program on longjmp call the system crash with a SIGSEGV signal. 
 
Anyone can tell me if it can be a compiler problem ?

Thanks,
 
Elena Labruna.