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

[Jamie Lokier]

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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/