On 2013-11-17 01:15, Stephen Tether wrote:
Why does arm_cp15_mmu_disable() clean and invalidate cache lines around the position of the stack pointer?
Suppose you have optimization disabled and the MMU and data cache is on. Now you call this function. The return address will be stored on the stack (in the cache). Now MMU/cache is disabled. Now the return address is retrieved from the stack (from memory) on return. Now everything is pretty unpredictable.
-- Sebastian Huber, embedded brains GmbH Address : Dornierstr. 4, D-82178 Puchheim, Germany Phone : +49 89 189 47 41-16 Fax : +49 89 189 47 41-09 E-Mail : sebastian.hu...@embedded-brains.de PGP : Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. _______________________________________________ rtems-devel mailing list rtems-devel@rtems.org http://www.rtems.org/mailman/listinfo/rtems-devel
