static struct vm_object *
new_exception(struct vm_class *vmc, const char *message)
{
struct vm_object *message_str;
struct vm_method *vmm;
struct vm_object *obj;
obj = vm_object_alloc(vmc);
if (!obj)
return rethrow_exception();
if (message == NULL)
message_str = NULL;
else {
message_str = vm_object_alloc_string_from_c(message);
if (!message_str)
return rethrow_exception();
}
vmm = vm_class_get_method(vmc, "<init>", "(Ljava/lang/String;)V");
if (vmm) {
vm_call_method(vmm, obj, message_str);
return obj;
}
vmm = vm_class_get_method(vmc, "<init>", "()V");
if (!vmm)
error("constructor not found for %s", vmc->name);
vm_call_method(vmm, obj);
return obj;
}
static int paging_on_demand_and_memory_protection_demo(void) {
vm_map_t *orig = get_user_vm_map();
vm_map_activate(vm_map_new());
vm_map_t *kmap = get_kernel_vm_map();
vm_map_t *umap = get_user_vm_map();
klog("Kernel physical map : %08lx-%08lx", kmap->pmap->start, kmap->pmap->end);
klog("User physical map : %08lx-%08lx", umap->pmap->start, umap->pmap->end);
vm_addr_t start = 0x1001000;
vm_addr_t end = 0x1001000 + 2 * PAGESIZE;
vm_map_entry_t *redzone0 =
vm_map_add_entry(umap, start - PAGESIZE, start, VM_PROT_NONE);
vm_map_entry_t *redzone1 =
vm_map_add_entry(umap, end, end + PAGESIZE, VM_PROT_NONE);
vm_map_entry_t *data =
vm_map_add_entry(umap, start, end, VM_PROT_READ | VM_PROT_WRITE);
redzone0->object = vm_object_alloc();
redzone1->object = vm_object_alloc();
data->object = default_pager->pgr_alloc();
vm_map_dump(umap);
vm_map_dump(kmap);
/* Start in paged on demand range, but end outside, to cause fault */
for (int *ptr = (int *)start; ptr != (int *)end; ptr += 256) {
klog("%p", ptr);
*ptr = 0xfeedbabe;
}
vm_map_dump(umap);
vm_map_dump(kmap);
/* Restore original vm_map */
vm_map_activate(orig);
vm_map_delete(umap);
klog("Test passed.");
return KTEST_SUCCESS;
}
