News for hackers. Stuff that matters.

A comment on Tock Embedded Operating System. Parent comment

Re:Tock Embedded Operating System by leggomylibro on Tuesday November 07, 2017 @06:26PM (#15648694)
>generally FreeRTOS applications have full access to all the memory.

Well yeah, because MCUs almost universally lack Memory Management Units. They can only set general permissions like R/W/X on blocks of memory, which makes enforcing permissions on a per-process basis extremely slow compared to hardware solutions.

I'd be curious to see how performant / power-efficient this will be compared to FreeRTOS.

[ Parent | on HN ]
Re:Tock Embedded Operating System by JoshTriplett on Tuesday November 07, 2017 @08:31PM (#15649314)
Current microcontrollers often have better protection mechanisms than that. Not necessarily fully capable MMUs, but sufficiently capable ones to allow for protection, as well as kernel/userspace separation.
[ Parent | on HN ]