alternatives to GCC 3.4.3 option -fstack-protector-all?

Question

I'm trying to set option -fstack-protector-all in GCC 3.4.3 compiler for enabling some stack smashing protection scenarios. However when compiling with this i got
error: unrecognized command line option "-fstack-protector-all" . So seems this option isn't implemented in GCC 3.4.3 ?? or Am I missing something ?

If it is not implemented in older GCC compiler what is the best / easiest alternative to this ?

Or maybe some useful code pattern to implement stack-smashing protector in C code itself ?

Thanks

Answer 1

You seem to be only one minor version off a gcc version that seems to be able to provide you with this particular smash protection. I found this when googling:

http://www.research.ibm.com/trl/projects/security/ssp/

Maybe you could upgrade to that one (one minor number up) and still be compatible with your vendor?

Additionally, as at least for a number of years canary values are default set in gcc (no need to use the option you mention), have you looked at the disassembly of a simple program? If you see some storing/loading from a (gs) location near end of stack, it's already implemented.