Hello, Is there an easy way within the current eCos infrastructure to disallow certain memory access? I recently completed a project using a different real-time operating system that had a guard page set up for page 0. Then any null pointer dereferencing caused a page fault. This turned out to be incredibly useful (especially since the page fault trapped to the debugger).
As far as I can read the start up files, eCos does not use the MMU (which is the way the other OS implemented this). Can the GDT be configured to do this same thing? If so, does that break the 1:1 correlation between physical address and logical address? If this is not possible with the GDT, would it be "easy" to set up the MMU on an i386 platform? I really don't know anything about that level of hardware/software configuration. Is there a recommended architecture to use as a model for implementing it in proper eCos style? I am not looking to set up various protection levels. I would just like to catch programming mistakes. Thank you David Brennan -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
