- /*
- * Age the cache here in all cases; this guarantees that we won't
- * be reusing only one entry over and over, once the system reaches
- * steady-state.
- */
- global_user_profile_cache.age+=1;
-
- if(data_vp != NULL) {
- kmem_free(kernel_map,
- (*profile)->buf_ptr, 4 * PAGE_SIZE);
- if ((*profile)->names_vp) {
- vrele((*profile)->names_vp);
- (*profile)->names_vp = NULL;
- }
- vrele(data_vp);
- }
-
- /* Try to open the appropriate users profile files */
- /* If neither file is present, try to create them */
- /* If one file is present and the other not, fail. */
- /* If the files do exist, check them for the app_file */
- /* requested and read it in if present */
-
- ret = kmem_alloc(kernel_map,
- (vm_offset_t *)&profile_data_string, PATH_MAX);
-
- if(ret) {
- (*profile)->data_vp = NULL;
- (*profile)->busy = 0;
- wakeup(*profile);
- return ENOMEM;
- }
-
- /* Split the buffer in half since we know the size of */
- /* our file path and our allocation is adequate for */
- /* both file path names */
- profile_names_string = profile_data_string + (PATH_MAX/2);
-
-
- strcpy(profile_data_string, cache_path);
- strcpy(profile_names_string, cache_path);
- profile_names_length = profile_data_length
- = strlen(profile_data_string);
- substring = profile_data_string + profile_data_length;
- sprintf(substring, "%x_data", user);
- substring = profile_names_string + profile_names_length;
- sprintf(substring, "%x_names", user);
-
- /* We now have the absolute file names */
-
- ret = kmem_alloc(kernel_map,
- (vm_offset_t *)&names_buf, 4 * PAGE_SIZE);
- if(ret) {
- kmem_free(kernel_map,
- (vm_offset_t)profile_data_string, PATH_MAX);
- (*profile)->data_vp = NULL;
- (*profile)->busy = 0;
- wakeup(*profile);
- return ENOMEM;
- }
-
- NDINIT(&nd_names, LOOKUP, FOLLOW | LOCKLEAF,
- UIO_SYSSPACE, profile_names_string, p);
- NDINIT(&nd_data, LOOKUP, FOLLOW | LOCKLEAF,
- UIO_SYSSPACE, profile_data_string, p);
- if (error = vn_open(&nd_data, FREAD | FWRITE, 0)) {
-#ifdef notdef
- printf("bsd_open_page_cache_files: CacheData file not found %s\n",
- profile_data_string);
-#endif
- kmem_free(kernel_map,
- (vm_offset_t)names_buf, 4 * PAGE_SIZE);
- kmem_free(kernel_map,
- (vm_offset_t)profile_data_string, PATH_MAX);
- (*profile)->data_vp = NULL;
- (*profile)->busy = 0;
- wakeup(*profile);
- return error;
- }
-
- data_vp = nd_data.ni_vp;
- VOP_UNLOCK(data_vp, 0, p);
-
- if (error = vn_open(&nd_names, FREAD | FWRITE, 0)) {
- printf("bsd_open_page_cache_files: NamesData file not found %s\n",
- profile_data_string);
- kmem_free(kernel_map,
- (vm_offset_t)names_buf, 4 * PAGE_SIZE);
- kmem_free(kernel_map,
- (vm_offset_t)profile_data_string, PATH_MAX);
- vrele(data_vp);
- (*profile)->data_vp = NULL;
- (*profile)->busy = 0;
- wakeup(*profile);
- return error;
- }
- names_vp = nd_names.ni_vp;
-
- if(error = VOP_GETATTR(names_vp, &vattr, p->p_ucred, p)) {
- printf("bsd_open_page_cache_files: Can't stat name file %s\n", profile_names_string);
- kmem_free(kernel_map,
- (vm_offset_t)profile_data_string, PATH_MAX);
- kmem_free(kernel_map,
- (vm_offset_t)names_buf, 4 * PAGE_SIZE);
- vput(names_vp);
- vrele(data_vp);
- (*profile)->data_vp = NULL;
- (*profile)->busy = 0;
- wakeup(*profile);
- return error;
- }
-
- size = vattr.va_size;
- if(size > 4 * PAGE_SIZE)
- size = 4 * PAGE_SIZE;
- buf_ptr = names_buf;
- resid_off = 0;
-
- while(size) {
- error = vn_rdwr(UIO_READ, names_vp, (caddr_t)buf_ptr,
- size, resid_off,
- UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p);
- if((error) || (size == resid)) {
- if(!error) {
- error = EINVAL;
+ SHARED_REGION_TRACE_DEBUG(
+ ("shared_region: %p [%d(%s)] -> check_np(0x%llx)\n",
+ current_thread(), p->p_pid, p->p_comm,
+ (uint64_t)uap->start_address));
+
+ /* retrieve the current tasks's shared region */
+ shared_region = vm_shared_region_get(current_task());
+ if (shared_region != NULL) {
+ /* retrieve address of its first mapping... */
+ kr = vm_shared_region_start_address(shared_region,
+ &start_address);
+ if (kr != KERN_SUCCESS) {
+ error = ENOMEM;
+ } else {
+ /* ... and give it to the caller */
+ error = copyout(&start_address,
+ (user_addr_t) uap->start_address,
+ sizeof (start_address));
+ if (error) {
+ SHARED_REGION_TRACE_ERROR(
+ ("shared_region: %p [%d(%s)] "
+ "check_np(0x%llx) "
+ "copyout(0x%llx) error %d\n",
+ current_thread(), p->p_pid, p->p_comm,
+ (uint64_t)uap->start_address, (uint64_t)start_address,
+ error));
projects / apple / xnu.git / blobdiff