Re: [OT] Testing PROT_NONE and other protections, and a surprise

Jamie Lokier
2004-07-01T14:50:25Z

Kyle Moffett wrote:
> >The error code is -1, aka. MAP_FAILED.
> Oops! I guess I was just lucky that part didn't fail :-D On the
> other hand, it couldn't legally return 0 anyway, could it?

Yes it could -- if you request a mapping at address 0 with MAP_FIXED.
A few OSes won't do that, but Linux and many others will.

-- Jamie