0f16d98b32
The CPU first checks the page directory entry for write or user permissions on a particular page before looking at the page table entry. If a region configured all pages to be non user accessible, and this was changed for a page within it to be accessible, the PDE would not be updated and any access would still return a page fault. The least amount of runtime logic to deal with this is to indicate at build time that some pages within a region may be marked writable or user accessible at runtime, and to pre-set the flags in the page directory entry accordingly. The driving need for this is the region configuration for kernel memory, which will have user permissions set at runtime for stacks and user-configured memory domains. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com> |
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| .. | ||
| debug | ||
| asm_inline.h | ||
| asm_inline_gcc.h | ||
| cache_private.h | ||
| exception.h | ||
| kernel_arch_data.h | ||
| kernel_arch_func.h | ||
| kernel_arch_thread.h | ||
| kernel_event_logger_arch.h | ||
| mmustructs.h | ||
| offsets_short_arch.h | ||
| swapstk.h | ||