Hi Philip,
On 23/11/10 08:27, Philip Nye wrote:
I'm trying to port some applications from an old kernel 2.4.x project to an up-to-date kernel 2.6.x build - all running on Coldfire with no MMU. One of these applications accesses some coldfire IO registers directly from userspace and it doesn't seem to be working after the port. Is it still the case that on a m68knommu system it is possible to simply read or write anywhere from userspace? or has some rudimentary protection been implemented?
Which ColdFire part are you using? Although the kernel doesn't specifically limit userspace accesses some ColdFire parts have "System Access Control Units" or similar mechanisms for limiting/protecting acceses. (I know the 523x parts have one for example). It could just be that this is/was set in the 2.4.x code and is not set the way you want in the 2.6.x code. Regards Greg ------------------------------------------------------------------------ Greg Ungerer -- Principal Engineer EMAIL: g...@snapgear.com SnapGear Group, McAfee PHONE: +61 7 3435 2888 8 Gardner Close FAX: +61 7 3217 5323 Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
