blob: 3d6af93fe5618093b5e3d69d58024b23bd63288a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: exnames - interpreter/scanner name load/execute
4 *
5 *****************************************************************************/
6
7/*
Bob Moorec8100dc2016-01-15 08:17:03 +08008 * Copyright (C) 2000 - 2016, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acinterp.h"
47#include "amlcode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040050ACPI_MODULE_NAME("exnames")
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Robert Moore44f6c012005-04-18 22:49:35 -040052/* Local prototypes */
Len Brown4be44fc2005-08-05 00:44:28 -040053static char *acpi_ex_allocate_name_string(u32 prefix_count, u32 num_name_segs);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Lv Zheng1f86e8c2012-10-31 02:25:45 +000055static acpi_status acpi_ex_name_segment(u8 **in_aml_address, char *name_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57/*******************************************************************************
58 *
59 * FUNCTION: acpi_ex_allocate_name_string
60 *
61 * PARAMETERS: prefix_count - Count of parent levels. Special cases:
Robert Moore44f6c012005-04-18 22:49:35 -040062 * (-1)==root, 0==none
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 * num_name_segs - count of 4-character name segments
64 *
Bob Moore73a30902012-10-31 02:26:55 +000065 * RETURN: A pointer to the allocated string segment. This segment must
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 * be deleted by the caller.
67 *
68 * DESCRIPTION: Allocate a buffer for a name string. Ensure allocated name
69 * string is long enough, and set up prefix if any.
70 *
71 ******************************************************************************/
72
Len Brown4be44fc2005-08-05 00:44:28 -040073static char *acpi_ex_allocate_name_string(u32 prefix_count, u32 num_name_segs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
Len Brown4be44fc2005-08-05 00:44:28 -040075 char *temp_ptr;
76 char *name_string;
77 u32 size_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Bob Mooreb229cf92006-04-21 17:15:00 -040079 ACPI_FUNCTION_TRACE(ex_allocate_name_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81 /*
Robert Moore44f6c012005-04-18 22:49:35 -040082 * Allow room for all \ and ^ prefixes, all segments and a multi_name_prefix.
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 * Also, one byte for the null terminator.
84 * This may actually be somewhat longer than needed.
85 */
86 if (prefix_count == ACPI_UINT32_MAX) {
Bob Moore52fc0b02006-10-02 00:00:00 -040087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 /* Special case for root */
89
90 size_needed = 1 + (ACPI_NAME_SIZE * num_name_segs) + 2 + 1;
Len Brown4be44fc2005-08-05 00:44:28 -040091 } else {
92 size_needed =
93 prefix_count + (ACPI_NAME_SIZE * num_name_segs) + 2 + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 }
95
96 /*
97 * Allocate a buffer for the name.
98 * This buffer must be deleted by the caller!
99 */
Bob Moore83135242006-10-03 00:00:00 -0400100 name_string = ACPI_ALLOCATE(size_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 if (!name_string) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500102 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800103 "Could not allocate size %u", size_needed));
Len Brown4be44fc2005-08-05 00:44:28 -0400104 return_PTR(NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 }
106
107 temp_ptr = name_string;
108
109 /* Set up Root or Parent prefixes if needed */
110
111 if (prefix_count == ACPI_UINT32_MAX) {
112 *temp_ptr++ = AML_ROOT_PREFIX;
Len Brown4be44fc2005-08-05 00:44:28 -0400113 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 while (prefix_count--) {
115 *temp_ptr++ = AML_PARENT_PREFIX;
116 }
117 }
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 /* Set up Dual or Multi prefixes if needed */
120
121 if (num_name_segs > 2) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 /* Set up multi prefixes */
124
125 *temp_ptr++ = AML_MULTI_NAME_PREFIX_OP;
Len Brown4be44fc2005-08-05 00:44:28 -0400126 *temp_ptr++ = (char)num_name_segs;
127 } else if (2 == num_name_segs) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 /* Set up dual prefixes */
130
131 *temp_ptr++ = AML_DUAL_NAME_PREFIX;
132 }
133
134 /*
135 * Terminate string following prefixes. acpi_ex_name_segment() will
136 * append the segment(s)
137 */
138 *temp_ptr = 0;
139
Len Brown4be44fc2005-08-05 00:44:28 -0400140 return_PTR(name_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
143/*******************************************************************************
144 *
145 * FUNCTION: acpi_ex_name_segment
146 *
Robert Moore44f6c012005-04-18 22:49:35 -0400147 * PARAMETERS: in_aml_address - Pointer to the name in the AML code
148 * name_string - Where to return the name. The name is appended
149 * to any existing string to form a namepath
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 *
151 * RETURN: Status
152 *
Robert Moore44f6c012005-04-18 22:49:35 -0400153 * DESCRIPTION: Extract an ACPI name (4 bytes) from the AML byte stream
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 *
155 ******************************************************************************/
156
Len Brown4be44fc2005-08-05 00:44:28 -0400157static acpi_status acpi_ex_name_segment(u8 ** in_aml_address, char *name_string)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{
Len Brown4be44fc2005-08-05 00:44:28 -0400159 char *aml_address = (void *)*in_aml_address;
160 acpi_status status = AE_OK;
161 u32 index;
162 char char_buf[5];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Bob Mooreb229cf92006-04-21 17:15:00 -0400164 ACPI_FUNCTION_TRACE(ex_name_segment);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166 /*
Bob Moore1fad8732015-12-29 13:54:36 +0800167 * If first character is a digit, then we know that we aren't looking
168 * at a valid name segment
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 */
170 char_buf[0] = *aml_address;
171
172 if ('0' <= char_buf[0] && char_buf[0] <= '9') {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500173 ACPI_ERROR((AE_INFO, "Invalid leading digit: %c", char_buf[0]));
Len Brown4be44fc2005-08-05 00:44:28 -0400174 return_ACPI_STATUS(AE_CTRL_PENDING);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 }
176
Len Brown4be44fc2005-08-05 00:44:28 -0400177 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Bytes from stream:\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
Lv Zheng1f86e8c2012-10-31 02:25:45 +0000179 for (index = 0;
180 (index < ACPI_NAME_SIZE)
Bob Moore6a0df322016-05-05 13:00:36 +0800181 && (acpi_ut_valid_name_char(*aml_address, 0)); index++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 char_buf[index] = *aml_address++;
Len Brown4be44fc2005-08-05 00:44:28 -0400183 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "%c\n", char_buf[index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 }
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 /* Valid name segment */
187
188 if (index == 4) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 /* Found 4 valid characters */
191
192 char_buf[4] = '\0';
193
194 if (name_string) {
Bob Moore4fa46162015-07-01 14:45:11 +0800195 strcat(name_string, char_buf);
Len Brown4be44fc2005-08-05 00:44:28 -0400196 ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
Bob Moore50eca3e2005-09-30 19:03:00 -0400197 "Appended to - %s\n", name_string));
Len Brown4be44fc2005-08-05 00:44:28 -0400198 } else {
199 ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
Bob Moore50eca3e2005-09-30 19:03:00 -0400200 "No Name string - %s\n", char_buf));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 }
Len Brown4be44fc2005-08-05 00:44:28 -0400202 } else if (index == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 /*
204 * First character was not a valid name character,
205 * so we are looking at something other than a name.
206 */
Len Brown4be44fc2005-08-05 00:44:28 -0400207 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
208 "Leading character is not alpha: %02Xh (not a name)\n",
209 char_buf[0]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 status = AE_CTRL_PENDING;
Len Brown4be44fc2005-08-05 00:44:28 -0400211 } else {
Robert Moore44f6c012005-04-18 22:49:35 -0400212 /*
213 * Segment started with one or more valid characters, but fewer than
214 * the required 4
215 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 status = AE_AML_BAD_NAME;
Bob Mooreb8e4d892006-01-27 16:43:00 -0500217 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800218 "Bad character 0x%02x in name, at %p",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500219 *aml_address, aml_address));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 }
221
Bob Moorec51a4de2005-11-17 13:07:00 -0500222 *in_aml_address = ACPI_CAST_PTR(u8, aml_address);
Len Brown4be44fc2005-08-05 00:44:28 -0400223 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226/*******************************************************************************
227 *
228 * FUNCTION: acpi_ex_get_name_string
229 *
Robert Moore44f6c012005-04-18 22:49:35 -0400230 * PARAMETERS: data_type - Object type to be associated with this
231 * name
232 * in_aml_address - Pointer to the namestring in the AML code
233 * out_name_string - Where the namestring is returned
234 * out_name_length - Length of the returned string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 *
Robert Moore44f6c012005-04-18 22:49:35 -0400236 * RETURN: Status, namestring and length
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 *
Robert Moore44f6c012005-04-18 22:49:35 -0400238 * DESCRIPTION: Extract a full namepath from the AML byte stream,
239 * including any prefixes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 *
241 ******************************************************************************/
242
243acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400244acpi_ex_get_name_string(acpi_object_type data_type,
245 u8 * in_aml_address,
246 char **out_name_string, u32 * out_name_length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
Len Brown4be44fc2005-08-05 00:44:28 -0400248 acpi_status status = AE_OK;
249 u8 *aml_address = in_aml_address;
250 char *name_string = NULL;
251 u32 num_segments;
252 u32 prefix_count = 0;
253 u8 has_prefix = FALSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Bob Mooreb229cf92006-04-21 17:15:00 -0400255 ACPI_FUNCTION_TRACE_PTR(ex_get_name_string, aml_address);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Len Brown4be44fc2005-08-05 00:44:28 -0400257 if (ACPI_TYPE_LOCAL_REGION_FIELD == data_type ||
258 ACPI_TYPE_LOCAL_BANK_FIELD == data_type ||
259 ACPI_TYPE_LOCAL_INDEX_FIELD == data_type) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 /* Disallow prefixes for types associated with field_unit names */
262
Len Brown4be44fc2005-08-05 00:44:28 -0400263 name_string = acpi_ex_allocate_name_string(0, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 if (!name_string) {
265 status = AE_NO_MEMORY;
Len Brown4be44fc2005-08-05 00:44:28 -0400266 } else {
267 status =
268 acpi_ex_name_segment(&aml_address, name_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 }
Len Brown4be44fc2005-08-05 00:44:28 -0400270 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 /*
272 * data_type is not a field name.
273 * Examine first character of name for root or parent prefix operators
274 */
275 switch (*aml_address) {
276 case AML_ROOT_PREFIX:
277
Len Brown4be44fc2005-08-05 00:44:28 -0400278 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
Bob Mooreb229cf92006-04-21 17:15:00 -0400279 "RootPrefix(\\) at %p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400280 aml_address));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
282 /*
283 * Remember that we have a root_prefix --
284 * see comment in acpi_ex_allocate_name_string()
285 */
286 aml_address++;
287 prefix_count = ACPI_UINT32_MAX;
288 has_prefix = TRUE;
289 break;
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 case AML_PARENT_PREFIX:
292
293 /* Increment past possibly multiple parent prefixes */
294
295 do {
Len Brown4be44fc2005-08-05 00:44:28 -0400296 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
Bob Mooreb229cf92006-04-21 17:15:00 -0400297 "ParentPrefix (^) at %p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400298 aml_address));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300 aml_address++;
301 prefix_count++;
302
303 } while (*aml_address == AML_PARENT_PREFIX);
304
305 has_prefix = TRUE;
306 break;
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 default:
309
310 /* Not a prefix character */
311
312 break;
313 }
314
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 /* Examine first character of name for name segment prefix operator */
316
317 switch (*aml_address) {
318 case AML_DUAL_NAME_PREFIX:
319
Len Brown4be44fc2005-08-05 00:44:28 -0400320 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
Bob Mooreb229cf92006-04-21 17:15:00 -0400321 "DualNamePrefix at %p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400322 aml_address));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324 aml_address++;
Len Brown4be44fc2005-08-05 00:44:28 -0400325 name_string =
326 acpi_ex_allocate_name_string(prefix_count, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 if (!name_string) {
328 status = AE_NO_MEMORY;
329 break;
330 }
331
332 /* Indicate that we processed a prefix */
333
334 has_prefix = TRUE;
335
Len Brown4be44fc2005-08-05 00:44:28 -0400336 status =
337 acpi_ex_name_segment(&aml_address, name_string);
338 if (ACPI_SUCCESS(status)) {
339 status =
340 acpi_ex_name_segment(&aml_address,
341 name_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 }
343 break;
344
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 case AML_MULTI_NAME_PREFIX_OP:
346
Len Brown4be44fc2005-08-05 00:44:28 -0400347 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
Bob Mooreb229cf92006-04-21 17:15:00 -0400348 "MultiNamePrefix at %p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400349 aml_address));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
351 /* Fetch count of segments remaining in name path */
352
353 aml_address++;
354 num_segments = *aml_address;
355
Len Brown4be44fc2005-08-05 00:44:28 -0400356 name_string =
357 acpi_ex_allocate_name_string(prefix_count,
358 num_segments);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 if (!name_string) {
360 status = AE_NO_MEMORY;
361 break;
362 }
363
364 /* Indicate that we processed a prefix */
365
366 aml_address++;
367 has_prefix = TRUE;
368
369 while (num_segments &&
Len Brown4be44fc2005-08-05 00:44:28 -0400370 (status =
371 acpi_ex_name_segment(&aml_address,
372 name_string)) == AE_OK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 num_segments--;
374 }
375
376 break;
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 case 0:
379
380 /* null_name valid as of 8-12-98 ASL/AML Grammar Update */
381
382 if (prefix_count == ACPI_UINT32_MAX) {
Len Brown4be44fc2005-08-05 00:44:28 -0400383 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Bob Mooreb229cf92006-04-21 17:15:00 -0400384 "NameSeg is \"\\\" followed by NULL\n"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 }
386
387 /* Consume the NULL byte */
388
389 aml_address++;
Len Brown4be44fc2005-08-05 00:44:28 -0400390 name_string =
391 acpi_ex_allocate_name_string(prefix_count, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (!name_string) {
393 status = AE_NO_MEMORY;
394 break;
395 }
396
397 break;
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 default:
400
401 /* Name segment string */
402
Len Brown4be44fc2005-08-05 00:44:28 -0400403 name_string =
404 acpi_ex_allocate_name_string(prefix_count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 if (!name_string) {
406 status = AE_NO_MEMORY;
407 break;
408 }
409
Len Brown4be44fc2005-08-05 00:44:28 -0400410 status =
411 acpi_ex_name_segment(&aml_address, name_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 break;
413 }
414 }
415
416 if (AE_CTRL_PENDING == status && has_prefix) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 /* Ran out of segments after processing a prefix */
419
Bob Mooreb8e4d892006-01-27 16:43:00 -0500420 ACPI_ERROR((AE_INFO, "Malformed Name at %p", name_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 status = AE_AML_BAD_NAME;
422 }
423
Len Brown4be44fc2005-08-05 00:44:28 -0400424 if (ACPI_FAILURE(status)) {
Robert Moore88ac00f2005-05-26 00:00:00 -0400425 if (name_string) {
Bob Moore83135242006-10-03 00:00:00 -0400426 ACPI_FREE(name_string);
Robert Moore88ac00f2005-05-26 00:00:00 -0400427 }
Len Brown4be44fc2005-08-05 00:44:28 -0400428 return_ACPI_STATUS(status);
Robert Moore88ac00f2005-05-26 00:00:00 -0400429 }
430
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 *out_name_string = name_string;
432 *out_name_length = (u32) (aml_address - in_aml_address);
433
Len Brown4be44fc2005-08-05 00:44:28 -0400434 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435}