Re: cvs commit: src/contrib/gcc protector.c protector.h Makefile.in calls.c combine.c cse.c explow.c expr.c flags.h function.c gcse.c integrate.c libgcc2.c loop.c optabs.c reload1.c toplev.c src/gnu/usr.bin/cc/cc_int Makefile

[Richard Coleman <Richard.Coleman@xxxxxxxxxx>]

Matthew Dillon wrote:

>     I don't know who comes up with these names.  W^X?  IA32 does not support
>     fine-grained permissions, the only way to make the stack non-executable
>     is to modify the SS segment register and while this does work, it creates
>     severe restrictions on how threaded programs can operate.
>      
> 					-Matt
> 					Matthew Dillon 
> 					<dillon@xxxxxxxxxxxxx>


Yes, but OpenBSD supports other archs besides IA32.  I think it was IA32 
and PowerPC that didn't have the bits necessary to do W^X properly.  So 
the OpenBSD folks did the best they could with the bits that were 
provided.  I think it's pretty exciting stuff.

Sure, it's not perfect.  But as you said, it's alot better than nothing.

Richard Coleman
Richard.coleman@xxxxxxxxxx