| 50 | } |
| 51 | |
| 52 | static void _null_page_fault(struct rt_varea *varea, |
| 53 | struct rt_aspace_fault_msg *msg) |
| 54 | { |
| 55 | static void *null_page; |
| 56 | |
| 57 | if (!null_page) |
| 58 | { |
| 59 | null_page = rt_pages_alloc_ext(0, PAGE_ANY_AVAILABLE); |
| 60 | if (null_page) |
| 61 | memset(null_page, 0, ARCH_PAGE_SIZE); |
| 62 | else |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | msg->response.status = MM_FAULT_STATUS_OK; |
| 67 | msg->response.size = ARCH_PAGE_SIZE; |
| 68 | msg->response.vaddr = null_page; |
| 69 | } |
| 70 | |
| 71 | static rt_err_t _null_shrink(rt_varea_t varea, void *new_start, rt_size_t size) |
| 72 | { |
nothing calls this directly
no test coverage detected