diff options
Diffstat (limited to 'kernel/features/mm.c')
| -rw-r--r-- | kernel/features/mm.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/features/mm.c b/kernel/features/mm.c index a0ed280..7baa4ea 100644 --- a/kernel/features/mm.c +++ b/kernel/features/mm.c @@ -698,9 +698,13 @@ CLEAR void memory_install(struct mem_info *mem_info, struct vid_info *vid_info) memory_map_identity(&kernel_dir, kernel_ro_memory_range(), MEMORY_READONLY); memory_map_identity(&kernel_dir, kernel_rw_memory_range(), MEMORY_NONE); - // Map kernel stack - memory_map_identity(&kernel_dir, memory_range_around(STACK_START - STACK_SIZE, STACK_SIZE), + // Map kernel stack with readonly boundaries (stack grows downwards!) + memory_map_identity(&kernel_dir, memory_range(STACK_START - STACK_SIZE, STACK_SIZE), MEMORY_NONE); + memory_map_identity(&kernel_dir, + memory_range(STACK_START - STACK_SIZE - PAGE_SIZE, PAGE_SIZE), + MEMORY_READONLY); + memory_map_identity(&kernel_dir, memory_range(STACK_START, PAGE_SIZE), MEMORY_READONLY); // Map framebuffer memory_map_identity(&kernel_dir, memory_range_around((u32)vid_info->vbe, 0x1000), |