diff options
Diffstat (limited to 'kernel/features/mm.c')
| -rw-r--r-- | kernel/features/mm.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/features/mm.c b/kernel/features/mm.c index 0972ab3..9a7a64e 100644 --- a/kernel/features/mm.c +++ b/kernel/features/mm.c @@ -82,14 +82,19 @@ void page_fault_handler(struct regs *r) u32 paddr = virtual_to_physical(dir, vaddr); // Print! + printf("%s process tried to %s a %s page at [vaddr=%x; paddr=%x]\n", super, operation, type, vaddr, paddr); + if (proc && vaddr > proc->regs.ebp - PROC_STACK_SIZE - PAGE_SIZE && vaddr < proc->regs.ebp + PAGE_SIZE) print("Probably a stack overflow\n"); + printf("Sections: [vaddr_section=%s; paddr_section=%s; eip_section=%s]\n", page_fault_section(vaddr), page_fault_section(paddr), page_fault_section(r->eip)); + /* printf("%b\n", virtual_entry(dir, vaddr)->uint); */ + isr_panic(r); } @@ -421,6 +426,14 @@ err: return NULL; } +void *memory_alloc_with_boundary(struct page_dir *dir, u32 size, u32 flags) +{ + u32 mem = PAGE_SIZE + (u32)memory_alloc(dir, size + 2 * PAGE_SIZE, flags); + virtual_remap_readonly(dir, memory_range(mem - PAGE_SIZE, PAGE_SIZE)); + virtual_remap_readonly(dir, memory_range(mem + size, PAGE_SIZE)); + return (void *)mem; +} + void *memory_alloc_identity(struct page_dir *dir, u32 flags) { for (u32 i = 1; i < PAGE_KERNEL_COUNT * PAGE_COUNT; i++) { |