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42f8fb75 BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsprepkg - Validation of package objects for predefined names | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
42f8fb75 BM |
9 | * 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 | ||
44 | #include <acpi/acpi.h> | |
45 | #include "accommon.h" | |
46 | #include "acnamesp.h" | |
47 | #include "acpredef.h" | |
48 | ||
49 | #define _COMPONENT ACPI_NAMESPACE | |
50 | ACPI_MODULE_NAME("nsprepkg") | |
51 | ||
52 | /* Local prototypes */ | |
53 | static acpi_status | |
29a241cc | 54 | acpi_ns_check_package_list(struct acpi_evaluate_info *info, |
42f8fb75 BM |
55 | const union acpi_predefined_info *package, |
56 | union acpi_operand_object **elements, u32 count); | |
57 | ||
58 | static acpi_status | |
29a241cc | 59 | acpi_ns_check_package_elements(struct acpi_evaluate_info *info, |
42f8fb75 BM |
60 | union acpi_operand_object **elements, |
61 | u8 type1, | |
62 | u32 count1, | |
63 | u8 type2, u32 count2, u32 start_index); | |
64 | ||
7952d402 BM |
65 | static acpi_status |
66 | acpi_ns_custom_package(struct acpi_evaluate_info *info, | |
67 | union acpi_operand_object **elements, u32 count); | |
68 | ||
42f8fb75 BM |
69 | /******************************************************************************* |
70 | * | |
71 | * FUNCTION: acpi_ns_check_package | |
72 | * | |
29a241cc | 73 | * PARAMETERS: info - Method execution information block |
42f8fb75 BM |
74 | * return_object_ptr - Pointer to the object returned from the |
75 | * evaluation of a method or object | |
76 | * | |
77 | * RETURN: Status | |
78 | * | |
79 | * DESCRIPTION: Check a returned package object for the correct count and | |
80 | * correct type of all sub-objects. | |
81 | * | |
82 | ******************************************************************************/ | |
83 | ||
84 | acpi_status | |
29a241cc | 85 | acpi_ns_check_package(struct acpi_evaluate_info *info, |
42f8fb75 BM |
86 | union acpi_operand_object **return_object_ptr) |
87 | { | |
88 | union acpi_operand_object *return_object = *return_object_ptr; | |
89 | const union acpi_predefined_info *package; | |
90 | union acpi_operand_object **elements; | |
91 | acpi_status status = AE_OK; | |
92 | u32 expected_count; | |
93 | u32 count; | |
94 | u32 i; | |
95 | ||
96 | ACPI_FUNCTION_NAME(ns_check_package); | |
97 | ||
98 | /* The package info for this name is in the next table entry */ | |
99 | ||
29a241cc | 100 | package = info->predefined + 1; |
42f8fb75 BM |
101 | |
102 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |
103 | "%s Validating return Package of Type %X, Count %X\n", | |
29a241cc | 104 | info->full_pathname, package->ret_info.type, |
42f8fb75 BM |
105 | return_object->package.count)); |
106 | ||
107 | /* | |
108 | * For variable-length Packages, we can safely remove all embedded | |
109 | * and trailing NULL package elements | |
110 | */ | |
29a241cc | 111 | acpi_ns_remove_null_elements(info, package->ret_info.type, |
42f8fb75 BM |
112 | return_object); |
113 | ||
114 | /* Extract package count and elements array */ | |
115 | ||
116 | elements = return_object->package.elements; | |
117 | count = return_object->package.count; | |
118 | ||
02d4fb36 BM |
119 | /* |
120 | * Most packages must have at least one element. The only exception | |
121 | * is the variable-length package (ACPI_PTYPE1_VAR). | |
122 | */ | |
42f8fb75 | 123 | if (!count) { |
02d4fb36 BM |
124 | if (package->ret_info.type == ACPI_PTYPE1_VAR) { |
125 | return (AE_OK); | |
126 | } | |
127 | ||
29a241cc BM |
128 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, |
129 | info->node_flags, | |
42f8fb75 BM |
130 | "Return Package has no elements (empty)")); |
131 | ||
132 | return (AE_AML_OPERAND_VALUE); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Decode the type of the expected package contents | |
137 | * | |
138 | * PTYPE1 packages contain no subpackages | |
0a16d12a | 139 | * PTYPE2 packages contain subpackages |
42f8fb75 BM |
140 | */ |
141 | switch (package->ret_info.type) { | |
7952d402 BM |
142 | case ACPI_PTYPE_CUSTOM: |
143 | ||
144 | status = acpi_ns_custom_package(info, elements, count); | |
145 | break; | |
146 | ||
42f8fb75 | 147 | case ACPI_PTYPE1_FIXED: |
42f8fb75 | 148 | /* |
0a16d12a | 149 | * The package count is fixed and there are no subpackages |
42f8fb75 BM |
150 | * |
151 | * If package is too small, exit. | |
152 | * If package is larger than expected, issue warning but continue | |
153 | */ | |
154 | expected_count = | |
155 | package->ret_info.count1 + package->ret_info.count2; | |
156 | if (count < expected_count) { | |
157 | goto package_too_small; | |
158 | } else if (count > expected_count) { | |
159 | ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, | |
160 | "%s: Return Package is larger than needed - " | |
161 | "found %u, expected %u\n", | |
29a241cc | 162 | info->full_pathname, count, |
42f8fb75 BM |
163 | expected_count)); |
164 | } | |
165 | ||
166 | /* Validate all elements of the returned package */ | |
167 | ||
29a241cc | 168 | status = acpi_ns_check_package_elements(info, elements, |
42f8fb75 BM |
169 | package->ret_info. |
170 | object_type1, | |
171 | package->ret_info. | |
172 | count1, | |
173 | package->ret_info. | |
174 | object_type2, | |
175 | package->ret_info. | |
176 | count2, 0); | |
177 | break; | |
178 | ||
179 | case ACPI_PTYPE1_VAR: | |
42f8fb75 | 180 | /* |
0a16d12a | 181 | * The package count is variable, there are no subpackages, and all |
42f8fb75 BM |
182 | * elements must be of the same type |
183 | */ | |
184 | for (i = 0; i < count; i++) { | |
29a241cc | 185 | status = acpi_ns_check_object_type(info, elements, |
42f8fb75 BM |
186 | package->ret_info. |
187 | object_type1, i); | |
188 | if (ACPI_FAILURE(status)) { | |
189 | return (status); | |
190 | } | |
2156510f | 191 | |
42f8fb75 BM |
192 | elements++; |
193 | } | |
194 | break; | |
195 | ||
196 | case ACPI_PTYPE1_OPTION: | |
42f8fb75 | 197 | /* |
0a16d12a | 198 | * The package count is variable, there are no subpackages. There are |
42f8fb75 BM |
199 | * a fixed number of required elements, and a variable number of |
200 | * optional elements. | |
201 | * | |
202 | * Check if package is at least as large as the minimum required | |
203 | */ | |
204 | expected_count = package->ret_info3.count; | |
205 | if (count < expected_count) { | |
206 | goto package_too_small; | |
207 | } | |
208 | ||
209 | /* Variable number of sub-objects */ | |
210 | ||
211 | for (i = 0; i < count; i++) { | |
212 | if (i < package->ret_info3.count) { | |
213 | ||
214 | /* These are the required package elements (0, 1, or 2) */ | |
215 | ||
216 | status = | |
29a241cc | 217 | acpi_ns_check_object_type(info, elements, |
42f8fb75 BM |
218 | package-> |
219 | ret_info3. | |
220 | object_type[i], | |
221 | i); | |
222 | if (ACPI_FAILURE(status)) { | |
223 | return (status); | |
224 | } | |
225 | } else { | |
226 | /* These are the optional package elements */ | |
227 | ||
228 | status = | |
29a241cc | 229 | acpi_ns_check_object_type(info, elements, |
42f8fb75 BM |
230 | package-> |
231 | ret_info3. | |
232 | tail_object_type, | |
233 | i); | |
234 | if (ACPI_FAILURE(status)) { | |
235 | return (status); | |
236 | } | |
237 | } | |
2156510f | 238 | |
42f8fb75 BM |
239 | elements++; |
240 | } | |
241 | break; | |
242 | ||
243 | case ACPI_PTYPE2_REV_FIXED: | |
244 | ||
245 | /* First element is the (Integer) revision */ | |
246 | ||
1fad8738 BM |
247 | status = |
248 | acpi_ns_check_object_type(info, elements, | |
249 | ACPI_RTYPE_INTEGER, 0); | |
42f8fb75 BM |
250 | if (ACPI_FAILURE(status)) { |
251 | return (status); | |
252 | } | |
253 | ||
254 | elements++; | |
255 | count--; | |
256 | ||
0a16d12a | 257 | /* Examine the subpackages */ |
42f8fb75 BM |
258 | |
259 | status = | |
29a241cc | 260 | acpi_ns_check_package_list(info, package, elements, count); |
42f8fb75 BM |
261 | break; |
262 | ||
263 | case ACPI_PTYPE2_PKG_COUNT: | |
264 | ||
0a16d12a | 265 | /* First element is the (Integer) count of subpackages to follow */ |
42f8fb75 | 266 | |
1fad8738 BM |
267 | status = |
268 | acpi_ns_check_object_type(info, elements, | |
269 | ACPI_RTYPE_INTEGER, 0); | |
42f8fb75 BM |
270 | if (ACPI_FAILURE(status)) { |
271 | return (status); | |
272 | } | |
273 | ||
274 | /* | |
275 | * Count cannot be larger than the parent package length, but allow it | |
276 | * to be smaller. The >= accounts for the Integer above. | |
277 | */ | |
278 | expected_count = (u32)(*elements)->integer.value; | |
279 | if (expected_count >= count) { | |
280 | goto package_too_small; | |
281 | } | |
282 | ||
283 | count = expected_count; | |
284 | elements++; | |
285 | ||
0a16d12a | 286 | /* Examine the subpackages */ |
42f8fb75 BM |
287 | |
288 | status = | |
29a241cc | 289 | acpi_ns_check_package_list(info, package, elements, count); |
42f8fb75 BM |
290 | break; |
291 | ||
292 | case ACPI_PTYPE2: | |
293 | case ACPI_PTYPE2_FIXED: | |
294 | case ACPI_PTYPE2_MIN: | |
295 | case ACPI_PTYPE2_COUNT: | |
296 | case ACPI_PTYPE2_FIX_VAR: | |
42f8fb75 BM |
297 | /* |
298 | * These types all return a single Package that consists of a | |
0a16d12a | 299 | * variable number of subpackages. |
42f8fb75 | 300 | * |
0a16d12a | 301 | * First, ensure that the first element is a subpackage. If not, |
42f8fb75 BM |
302 | * the BIOS may have incorrectly returned the object as a single |
303 | * package instead of a Package of Packages (a common error if | |
304 | * there is only one entry). We may be able to repair this by | |
305 | * wrapping the returned Package with a new outer Package. | |
306 | */ | |
307 | if (*elements | |
308 | && ((*elements)->common.type != ACPI_TYPE_PACKAGE)) { | |
309 | ||
310 | /* Create the new outer package and populate it */ | |
311 | ||
312 | status = | |
29a241cc | 313 | acpi_ns_wrap_with_package(info, return_object, |
42f8fb75 BM |
314 | return_object_ptr); |
315 | if (ACPI_FAILURE(status)) { | |
316 | return (status); | |
317 | } | |
318 | ||
319 | /* Update locals to point to the new package (of 1 element) */ | |
320 | ||
321 | return_object = *return_object_ptr; | |
322 | elements = return_object->package.elements; | |
323 | count = 1; | |
324 | } | |
325 | ||
0a16d12a | 326 | /* Examine the subpackages */ |
42f8fb75 BM |
327 | |
328 | status = | |
29a241cc | 329 | acpi_ns_check_package_list(info, package, elements, count); |
42f8fb75 BM |
330 | break; |
331 | ||
e34a7813 BM |
332 | case ACPI_PTYPE2_VAR_VAR: |
333 | /* | |
334 | * Returns a variable list of packages, each with a variable list | |
335 | * of objects. | |
336 | */ | |
337 | break; | |
338 | ||
b1272e1f MW |
339 | case ACPI_PTYPE2_UUID_PAIR: |
340 | ||
341 | /* The package must contain pairs of (UUID + type) */ | |
342 | ||
343 | if (count & 1) { | |
344 | expected_count = count + 1; | |
345 | goto package_too_small; | |
346 | } | |
347 | ||
348 | while (count > 0) { | |
349 | status = acpi_ns_check_object_type(info, elements, | |
350 | package->ret_info. | |
351 | object_type1, 0); | |
352 | if (ACPI_FAILURE(status)) { | |
353 | return (status); | |
354 | } | |
355 | ||
356 | /* Validate length of the UUID buffer */ | |
357 | ||
358 | if ((*elements)->buffer.length != 16) { | |
359 | ACPI_WARN_PREDEFINED((AE_INFO, | |
360 | info->full_pathname, | |
361 | info->node_flags, | |
362 | "Invalid length for UUID Buffer")); | |
363 | return (AE_AML_OPERAND_VALUE); | |
364 | } | |
365 | ||
366 | status = acpi_ns_check_object_type(info, elements + 1, | |
367 | package->ret_info. | |
368 | object_type2, 0); | |
369 | if (ACPI_FAILURE(status)) { | |
370 | return (status); | |
371 | } | |
372 | ||
373 | elements += 2; | |
374 | count -= 2; | |
375 | } | |
376 | break; | |
377 | ||
42f8fb75 BM |
378 | default: |
379 | ||
380 | /* Should not get here if predefined info table is correct */ | |
381 | ||
29a241cc BM |
382 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, |
383 | info->node_flags, | |
42f8fb75 BM |
384 | "Invalid internal return type in table entry: %X", |
385 | package->ret_info.type)); | |
386 | ||
387 | return (AE_AML_INTERNAL); | |
388 | } | |
389 | ||
390 | return (status); | |
391 | ||
10622bf8 | 392 | package_too_small: |
42f8fb75 BM |
393 | |
394 | /* Error exit for the case with an incorrect package count */ | |
395 | ||
29a241cc | 396 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, |
42f8fb75 BM |
397 | "Return Package is too small - found %u elements, expected %u", |
398 | count, expected_count)); | |
399 | ||
400 | return (AE_AML_OPERAND_VALUE); | |
401 | } | |
402 | ||
403 | /******************************************************************************* | |
404 | * | |
405 | * FUNCTION: acpi_ns_check_package_list | |
406 | * | |
29a241cc | 407 | * PARAMETERS: info - Method execution information block |
42f8fb75 BM |
408 | * package - Pointer to package-specific info for method |
409 | * elements - Element list of parent package. All elements | |
410 | * of this list should be of type Package. | |
411 | * count - Count of subpackages | |
412 | * | |
413 | * RETURN: Status | |
414 | * | |
415 | * DESCRIPTION: Examine a list of subpackages | |
416 | * | |
417 | ******************************************************************************/ | |
418 | ||
419 | static acpi_status | |
29a241cc | 420 | acpi_ns_check_package_list(struct acpi_evaluate_info *info, |
42f8fb75 BM |
421 | const union acpi_predefined_info *package, |
422 | union acpi_operand_object **elements, u32 count) | |
423 | { | |
424 | union acpi_operand_object *sub_package; | |
425 | union acpi_operand_object **sub_elements; | |
426 | acpi_status status; | |
427 | u32 expected_count; | |
428 | u32 i; | |
429 | u32 j; | |
430 | ||
431 | /* | |
0a16d12a | 432 | * Validate each subpackage in the parent Package |
42f8fb75 | 433 | * |
0a16d12a | 434 | * NOTE: assumes list of subpackages contains no NULL elements. |
42f8fb75 BM |
435 | * Any NULL elements should have been removed by earlier call |
436 | * to acpi_ns_remove_null_elements. | |
437 | */ | |
438 | for (i = 0; i < count; i++) { | |
439 | sub_package = *elements; | |
440 | sub_elements = sub_package->package.elements; | |
29a241cc | 441 | info->parent_package = sub_package; |
42f8fb75 BM |
442 | |
443 | /* Each sub-object must be of type Package */ | |
444 | ||
29a241cc | 445 | status = acpi_ns_check_object_type(info, &sub_package, |
42f8fb75 BM |
446 | ACPI_RTYPE_PACKAGE, i); |
447 | if (ACPI_FAILURE(status)) { | |
448 | return (status); | |
449 | } | |
450 | ||
0a16d12a | 451 | /* Examine the different types of expected subpackages */ |
42f8fb75 | 452 | |
29a241cc | 453 | info->parent_package = sub_package; |
42f8fb75 BM |
454 | switch (package->ret_info.type) { |
455 | case ACPI_PTYPE2: | |
456 | case ACPI_PTYPE2_PKG_COUNT: | |
457 | case ACPI_PTYPE2_REV_FIXED: | |
458 | ||
459 | /* Each subpackage has a fixed number of elements */ | |
460 | ||
461 | expected_count = | |
462 | package->ret_info.count1 + package->ret_info.count2; | |
463 | if (sub_package->package.count < expected_count) { | |
464 | goto package_too_small; | |
465 | } | |
466 | ||
467 | status = | |
29a241cc | 468 | acpi_ns_check_package_elements(info, sub_elements, |
42f8fb75 BM |
469 | package->ret_info. |
470 | object_type1, | |
471 | package->ret_info. | |
472 | count1, | |
473 | package->ret_info. | |
474 | object_type2, | |
475 | package->ret_info. | |
476 | count2, 0); | |
477 | if (ACPI_FAILURE(status)) { | |
478 | return (status); | |
479 | } | |
480 | break; | |
481 | ||
482 | case ACPI_PTYPE2_FIX_VAR: | |
483 | /* | |
484 | * Each subpackage has a fixed number of elements and an | |
485 | * optional element | |
486 | */ | |
487 | expected_count = | |
488 | package->ret_info.count1 + package->ret_info.count2; | |
489 | if (sub_package->package.count < expected_count) { | |
490 | goto package_too_small; | |
491 | } | |
492 | ||
493 | status = | |
29a241cc | 494 | acpi_ns_check_package_elements(info, sub_elements, |
42f8fb75 BM |
495 | package->ret_info. |
496 | object_type1, | |
497 | package->ret_info. | |
498 | count1, | |
499 | package->ret_info. | |
500 | object_type2, | |
501 | sub_package->package. | |
502 | count - | |
503 | package->ret_info. | |
504 | count1, 0); | |
505 | if (ACPI_FAILURE(status)) { | |
506 | return (status); | |
507 | } | |
508 | break; | |
509 | ||
e34a7813 BM |
510 | case ACPI_PTYPE2_VAR_VAR: |
511 | /* | |
512 | * Each subpackage has a fixed or variable number of elements | |
513 | */ | |
514 | break; | |
515 | ||
42f8fb75 BM |
516 | case ACPI_PTYPE2_FIXED: |
517 | ||
0a16d12a | 518 | /* Each subpackage has a fixed length */ |
42f8fb75 BM |
519 | |
520 | expected_count = package->ret_info2.count; | |
521 | if (sub_package->package.count < expected_count) { | |
522 | goto package_too_small; | |
523 | } | |
524 | ||
0a16d12a | 525 | /* Check the type of each subpackage element */ |
42f8fb75 BM |
526 | |
527 | for (j = 0; j < expected_count; j++) { | |
528 | status = | |
29a241cc | 529 | acpi_ns_check_object_type(info, |
42f8fb75 BM |
530 | &sub_elements[j], |
531 | package-> | |
532 | ret_info2. | |
533 | object_type[j], | |
534 | j); | |
535 | if (ACPI_FAILURE(status)) { | |
536 | return (status); | |
537 | } | |
538 | } | |
539 | break; | |
540 | ||
541 | case ACPI_PTYPE2_MIN: | |
542 | ||
0a16d12a | 543 | /* Each subpackage has a variable but minimum length */ |
42f8fb75 BM |
544 | |
545 | expected_count = package->ret_info.count1; | |
546 | if (sub_package->package.count < expected_count) { | |
547 | goto package_too_small; | |
548 | } | |
549 | ||
0a16d12a | 550 | /* Check the type of each subpackage element */ |
42f8fb75 BM |
551 | |
552 | status = | |
29a241cc | 553 | acpi_ns_check_package_elements(info, sub_elements, |
42f8fb75 BM |
554 | package->ret_info. |
555 | object_type1, | |
556 | sub_package->package. | |
557 | count, 0, 0, 0); | |
558 | if (ACPI_FAILURE(status)) { | |
559 | return (status); | |
560 | } | |
561 | break; | |
562 | ||
563 | case ACPI_PTYPE2_COUNT: | |
42f8fb75 BM |
564 | /* |
565 | * First element is the (Integer) count of elements, including | |
566 | * the count field (the ACPI name is num_elements) | |
567 | */ | |
29a241cc | 568 | status = acpi_ns_check_object_type(info, sub_elements, |
42f8fb75 BM |
569 | ACPI_RTYPE_INTEGER, |
570 | 0); | |
571 | if (ACPI_FAILURE(status)) { | |
572 | return (status); | |
573 | } | |
574 | ||
575 | /* | |
576 | * Make sure package is large enough for the Count and is | |
577 | * is as large as the minimum size | |
578 | */ | |
579 | expected_count = (u32)(*sub_elements)->integer.value; | |
580 | if (sub_package->package.count < expected_count) { | |
581 | goto package_too_small; | |
582 | } | |
2156510f | 583 | |
42f8fb75 BM |
584 | if (sub_package->package.count < |
585 | package->ret_info.count1) { | |
586 | expected_count = package->ret_info.count1; | |
587 | goto package_too_small; | |
588 | } | |
2156510f | 589 | |
42f8fb75 BM |
590 | if (expected_count == 0) { |
591 | /* | |
592 | * Either the num_entries element was originally zero or it was | |
593 | * a NULL element and repaired to an Integer of value zero. | |
594 | * In either case, repair it by setting num_entries to be the | |
595 | * actual size of the subpackage. | |
596 | */ | |
597 | expected_count = sub_package->package.count; | |
598 | (*sub_elements)->integer.value = expected_count; | |
599 | } | |
600 | ||
0a16d12a | 601 | /* Check the type of each subpackage element */ |
42f8fb75 BM |
602 | |
603 | status = | |
29a241cc | 604 | acpi_ns_check_package_elements(info, |
42f8fb75 BM |
605 | (sub_elements + 1), |
606 | package->ret_info. | |
607 | object_type1, | |
608 | (expected_count - 1), | |
609 | 0, 0, 1); | |
610 | if (ACPI_FAILURE(status)) { | |
611 | return (status); | |
612 | } | |
613 | break; | |
614 | ||
615 | default: /* Should not get here, type was validated by caller */ | |
616 | ||
617 | return (AE_AML_INTERNAL); | |
618 | } | |
619 | ||
620 | elements++; | |
621 | } | |
622 | ||
623 | return (AE_OK); | |
624 | ||
10622bf8 | 625 | package_too_small: |
42f8fb75 | 626 | |
0a16d12a | 627 | /* The subpackage count was smaller than required */ |
42f8fb75 | 628 | |
29a241cc | 629 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, |
0a16d12a | 630 | "Return SubPackage[%u] is too small - found %u elements, expected %u", |
42f8fb75 BM |
631 | i, sub_package->package.count, expected_count)); |
632 | ||
633 | return (AE_AML_OPERAND_VALUE); | |
634 | } | |
635 | ||
7952d402 BM |
636 | /******************************************************************************* |
637 | * | |
638 | * FUNCTION: acpi_ns_custom_package | |
639 | * | |
640 | * PARAMETERS: info - Method execution information block | |
641 | * elements - Pointer to the package elements array | |
642 | * count - Element count for the package | |
643 | * | |
644 | * RETURN: Status | |
645 | * | |
646 | * DESCRIPTION: Check a returned package object for the correct count and | |
647 | * correct type of all sub-objects. | |
648 | * | |
649 | * NOTE: Currently used for the _BIX method only. When needed for two or more | |
650 | * methods, probably a detect/dispatch mechanism will be required. | |
651 | * | |
652 | ******************************************************************************/ | |
653 | ||
654 | static acpi_status | |
655 | acpi_ns_custom_package(struct acpi_evaluate_info *info, | |
656 | union acpi_operand_object **elements, u32 count) | |
657 | { | |
658 | u32 expected_count; | |
659 | u32 version; | |
660 | acpi_status status = AE_OK; | |
661 | ||
662 | ACPI_FUNCTION_NAME(ns_custom_package); | |
663 | ||
664 | /* Get version number, must be Integer */ | |
665 | ||
666 | if ((*elements)->common.type != ACPI_TYPE_INTEGER) { | |
667 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, | |
668 | info->node_flags, | |
669 | "Return Package has invalid object type for version number")); | |
670 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
671 | } | |
672 | ||
673 | version = (u32)(*elements)->integer.value; | |
674 | expected_count = 21; /* Version 1 */ | |
675 | ||
676 | if (version == 0) { | |
677 | expected_count = 20; /* Version 0 */ | |
678 | } | |
679 | ||
680 | if (count < expected_count) { | |
681 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, | |
682 | info->node_flags, | |
683 | "Return Package is too small - found %u elements, expected %u", | |
684 | count, expected_count)); | |
685 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); | |
686 | } else if (count > expected_count) { | |
687 | ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, | |
688 | "%s: Return Package is larger than needed - " | |
689 | "found %u, expected %u\n", | |
690 | info->full_pathname, count, expected_count)); | |
691 | } | |
692 | ||
693 | /* Validate all elements of the returned package */ | |
694 | ||
695 | status = acpi_ns_check_package_elements(info, elements, | |
696 | ACPI_RTYPE_INTEGER, 16, | |
697 | ACPI_RTYPE_STRING, 4, 0); | |
698 | if (ACPI_FAILURE(status)) { | |
699 | return_ACPI_STATUS(status); | |
700 | } | |
701 | ||
702 | /* Version 1 has a single trailing integer */ | |
703 | ||
704 | if (version > 0) { | |
705 | status = acpi_ns_check_package_elements(info, elements + 20, | |
706 | ACPI_RTYPE_INTEGER, 1, | |
707 | 0, 0, 20); | |
708 | } | |
709 | ||
710 | return_ACPI_STATUS(status); | |
711 | } | |
712 | ||
42f8fb75 BM |
713 | /******************************************************************************* |
714 | * | |
715 | * FUNCTION: acpi_ns_check_package_elements | |
716 | * | |
29a241cc | 717 | * PARAMETERS: info - Method execution information block |
42f8fb75 BM |
718 | * elements - Pointer to the package elements array |
719 | * type1 - Object type for first group | |
720 | * count1 - Count for first group | |
721 | * type2 - Object type for second group | |
722 | * count2 - Count for second group | |
723 | * start_index - Start of the first group of elements | |
724 | * | |
725 | * RETURN: Status | |
726 | * | |
727 | * DESCRIPTION: Check that all elements of a package are of the correct object | |
728 | * type. Supports up to two groups of different object types. | |
729 | * | |
730 | ******************************************************************************/ | |
731 | ||
732 | static acpi_status | |
29a241cc | 733 | acpi_ns_check_package_elements(struct acpi_evaluate_info *info, |
42f8fb75 BM |
734 | union acpi_operand_object **elements, |
735 | u8 type1, | |
736 | u32 count1, | |
737 | u8 type2, u32 count2, u32 start_index) | |
738 | { | |
739 | union acpi_operand_object **this_element = elements; | |
740 | acpi_status status; | |
741 | u32 i; | |
742 | ||
743 | /* | |
744 | * Up to two groups of package elements are supported by the data | |
745 | * structure. All elements in each group must be of the same type. | |
746 | * The second group can have a count of zero. | |
747 | */ | |
748 | for (i = 0; i < count1; i++) { | |
29a241cc | 749 | status = acpi_ns_check_object_type(info, this_element, |
42f8fb75 BM |
750 | type1, i + start_index); |
751 | if (ACPI_FAILURE(status)) { | |
752 | return (status); | |
753 | } | |
2156510f | 754 | |
42f8fb75 BM |
755 | this_element++; |
756 | } | |
757 | ||
758 | for (i = 0; i < count2; i++) { | |
29a241cc | 759 | status = acpi_ns_check_object_type(info, this_element, |
42f8fb75 BM |
760 | type2, |
761 | (i + count1 + start_index)); | |
762 | if (ACPI_FAILURE(status)) { | |
763 | return (status); | |
764 | } | |
2156510f | 765 | |
42f8fb75 BM |
766 | this_element++; |
767 | } | |
768 | ||
769 | return (AE_OK); | |
770 | } |