1 /******************************************************************************
3 * Module Name: nsprepkg - Validation of package objects for predefined names
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2016, Intel Corp.
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44 #include <acpi/acpi.h>
49 #define _COMPONENT ACPI_NAMESPACE
50 ACPI_MODULE_NAME("nsprepkg")
52 /* Local prototypes */
54 acpi_ns_check_package_list(struct acpi_evaluate_info *info,
55 const union acpi_predefined_info *package,
56 union acpi_operand_object **elements, u32 count);
59 acpi_ns_check_package_elements(struct acpi_evaluate_info *info,
60 union acpi_operand_object **elements,
63 u8 type2, u32 count2, u32 start_index);
65 /*******************************************************************************
67 * FUNCTION: acpi_ns_check_package
69 * PARAMETERS: info - Method execution information block
70 * return_object_ptr - Pointer to the object returned from the
71 * evaluation of a method or object
75 * DESCRIPTION: Check a returned package object for the correct count and
76 * correct type of all sub-objects.
78 ******************************************************************************/
81 acpi_ns_check_package(struct acpi_evaluate_info *info,
82 union acpi_operand_object **return_object_ptr)
84 union acpi_operand_object *return_object = *return_object_ptr;
85 const union acpi_predefined_info *package;
86 union acpi_operand_object **elements;
87 acpi_status status = AE_OK;
92 ACPI_FUNCTION_NAME(ns_check_package);
94 /* The package info for this name is in the next table entry */
96 package = info->predefined + 1;
98 ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
99 "%s Validating return Package of Type %X, Count %X\n",
100 info->full_pathname, package->ret_info.type,
101 return_object->package.count));
104 * For variable-length Packages, we can safely remove all embedded
105 * and trailing NULL package elements
107 acpi_ns_remove_null_elements(info, package->ret_info.type,
110 /* Extract package count and elements array */
112 elements = return_object->package.elements;
113 count = return_object->package.count;
116 * Most packages must have at least one element. The only exception
117 * is the variable-length package (ACPI_PTYPE1_VAR).
120 if (package->ret_info.type == ACPI_PTYPE1_VAR) {
124 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
126 "Return Package has no elements (empty)"));
128 return (AE_AML_OPERAND_VALUE);
132 * Decode the type of the expected package contents
134 * PTYPE1 packages contain no subpackages
135 * PTYPE2 packages contain subpackages
137 switch (package->ret_info.type) {
138 case ACPI_PTYPE1_FIXED:
140 * The package count is fixed and there are no subpackages
142 * If package is too small, exit.
143 * If package is larger than expected, issue warning but continue
146 package->ret_info.count1 + package->ret_info.count2;
147 if (count < expected_count) {
148 goto package_too_small;
149 } else if (count > expected_count) {
150 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
151 "%s: Return Package is larger than needed - "
152 "found %u, expected %u\n",
153 info->full_pathname, count,
157 /* Validate all elements of the returned package */
159 status = acpi_ns_check_package_elements(info, elements,
170 case ACPI_PTYPE1_VAR:
172 * The package count is variable, there are no subpackages, and all
173 * elements must be of the same type
175 for (i = 0; i < count; i++) {
176 status = acpi_ns_check_object_type(info, elements,
179 if (ACPI_FAILURE(status)) {
186 case ACPI_PTYPE1_OPTION:
188 * The package count is variable, there are no subpackages. There are
189 * a fixed number of required elements, and a variable number of
192 * Check if package is at least as large as the minimum required
194 expected_count = package->ret_info3.count;
195 if (count < expected_count) {
196 goto package_too_small;
199 /* Variable number of sub-objects */
201 for (i = 0; i < count; i++) {
202 if (i < package->ret_info3.count) {
204 /* These are the required package elements (0, 1, or 2) */
207 acpi_ns_check_object_type(info, elements,
212 if (ACPI_FAILURE(status)) {
216 /* These are the optional package elements */
219 acpi_ns_check_object_type(info, elements,
224 if (ACPI_FAILURE(status)) {
232 case ACPI_PTYPE2_REV_FIXED:
234 /* First element is the (Integer) revision */
237 acpi_ns_check_object_type(info, elements,
238 ACPI_RTYPE_INTEGER, 0);
239 if (ACPI_FAILURE(status)) {
246 /* Examine the subpackages */
249 acpi_ns_check_package_list(info, package, elements, count);
252 case ACPI_PTYPE2_PKG_COUNT:
254 /* First element is the (Integer) count of subpackages to follow */
257 acpi_ns_check_object_type(info, elements,
258 ACPI_RTYPE_INTEGER, 0);
259 if (ACPI_FAILURE(status)) {
264 * Count cannot be larger than the parent package length, but allow it
265 * to be smaller. The >= accounts for the Integer above.
267 expected_count = (u32)(*elements)->integer.value;
268 if (expected_count >= count) {
269 goto package_too_small;
272 count = expected_count;
275 /* Examine the subpackages */
278 acpi_ns_check_package_list(info, package, elements, count);
282 case ACPI_PTYPE2_FIXED:
283 case ACPI_PTYPE2_MIN:
284 case ACPI_PTYPE2_COUNT:
285 case ACPI_PTYPE2_FIX_VAR:
287 * These types all return a single Package that consists of a
288 * variable number of subpackages.
290 * First, ensure that the first element is a subpackage. If not,
291 * the BIOS may have incorrectly returned the object as a single
292 * package instead of a Package of Packages (a common error if
293 * there is only one entry). We may be able to repair this by
294 * wrapping the returned Package with a new outer Package.
297 && ((*elements)->common.type != ACPI_TYPE_PACKAGE)) {
299 /* Create the new outer package and populate it */
302 acpi_ns_wrap_with_package(info, return_object,
304 if (ACPI_FAILURE(status)) {
308 /* Update locals to point to the new package (of 1 element) */
310 return_object = *return_object_ptr;
311 elements = return_object->package.elements;
315 /* Examine the subpackages */
318 acpi_ns_check_package_list(info, package, elements, count);
321 case ACPI_PTYPE2_VAR_VAR:
323 * Returns a variable list of packages, each with a variable list
328 case ACPI_PTYPE2_UUID_PAIR:
330 /* The package must contain pairs of (UUID + type) */
333 expected_count = count + 1;
334 goto package_too_small;
338 status = acpi_ns_check_object_type(info, elements,
341 if (ACPI_FAILURE(status)) {
345 /* Validate length of the UUID buffer */
347 if ((*elements)->buffer.length != 16) {
348 ACPI_WARN_PREDEFINED((AE_INFO,
351 "Invalid length for UUID Buffer"));
352 return (AE_AML_OPERAND_VALUE);
355 status = acpi_ns_check_object_type(info, elements + 1,
358 if (ACPI_FAILURE(status)) {
369 /* Should not get here if predefined info table is correct */
371 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
373 "Invalid internal return type in table entry: %X",
374 package->ret_info.type));
376 return (AE_AML_INTERNAL);
383 /* Error exit for the case with an incorrect package count */
385 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags,
386 "Return Package is too small - found %u elements, expected %u",
387 count, expected_count));
389 return (AE_AML_OPERAND_VALUE);
392 /*******************************************************************************
394 * FUNCTION: acpi_ns_check_package_list
396 * PARAMETERS: info - Method execution information block
397 * package - Pointer to package-specific info for method
398 * elements - Element list of parent package. All elements
399 * of this list should be of type Package.
400 * count - Count of subpackages
404 * DESCRIPTION: Examine a list of subpackages
406 ******************************************************************************/
409 acpi_ns_check_package_list(struct acpi_evaluate_info *info,
410 const union acpi_predefined_info *package,
411 union acpi_operand_object **elements, u32 count)
413 union acpi_operand_object *sub_package;
414 union acpi_operand_object **sub_elements;
421 * Validate each subpackage in the parent Package
423 * NOTE: assumes list of subpackages contains no NULL elements.
424 * Any NULL elements should have been removed by earlier call
425 * to acpi_ns_remove_null_elements.
427 for (i = 0; i < count; i++) {
428 sub_package = *elements;
429 sub_elements = sub_package->package.elements;
430 info->parent_package = sub_package;
432 /* Each sub-object must be of type Package */
434 status = acpi_ns_check_object_type(info, &sub_package,
435 ACPI_RTYPE_PACKAGE, i);
436 if (ACPI_FAILURE(status)) {
440 /* Examine the different types of expected subpackages */
442 info->parent_package = sub_package;
443 switch (package->ret_info.type) {
445 case ACPI_PTYPE2_PKG_COUNT:
446 case ACPI_PTYPE2_REV_FIXED:
448 /* Each subpackage has a fixed number of elements */
451 package->ret_info.count1 + package->ret_info.count2;
452 if (sub_package->package.count < expected_count) {
453 goto package_too_small;
457 acpi_ns_check_package_elements(info, sub_elements,
466 if (ACPI_FAILURE(status)) {
471 case ACPI_PTYPE2_FIX_VAR:
473 * Each subpackage has a fixed number of elements and an
477 package->ret_info.count1 + package->ret_info.count2;
478 if (sub_package->package.count < expected_count) {
479 goto package_too_small;
483 acpi_ns_check_package_elements(info, sub_elements,
490 sub_package->package.
494 if (ACPI_FAILURE(status)) {
499 case ACPI_PTYPE2_VAR_VAR:
501 * Each subpackage has a fixed or variable number of elements
505 case ACPI_PTYPE2_FIXED:
507 /* Each subpackage has a fixed length */
509 expected_count = package->ret_info2.count;
510 if (sub_package->package.count < expected_count) {
511 goto package_too_small;
514 /* Check the type of each subpackage element */
516 for (j = 0; j < expected_count; j++) {
518 acpi_ns_check_object_type(info,
524 if (ACPI_FAILURE(status)) {
530 case ACPI_PTYPE2_MIN:
532 /* Each subpackage has a variable but minimum length */
534 expected_count = package->ret_info.count1;
535 if (sub_package->package.count < expected_count) {
536 goto package_too_small;
539 /* Check the type of each subpackage element */
542 acpi_ns_check_package_elements(info, sub_elements,
545 sub_package->package.
547 if (ACPI_FAILURE(status)) {
552 case ACPI_PTYPE2_COUNT:
554 * First element is the (Integer) count of elements, including
555 * the count field (the ACPI name is num_elements)
557 status = acpi_ns_check_object_type(info, sub_elements,
560 if (ACPI_FAILURE(status)) {
565 * Make sure package is large enough for the Count and is
566 * is as large as the minimum size
568 expected_count = (u32)(*sub_elements)->integer.value;
569 if (sub_package->package.count < expected_count) {
570 goto package_too_small;
572 if (sub_package->package.count <
573 package->ret_info.count1) {
574 expected_count = package->ret_info.count1;
575 goto package_too_small;
577 if (expected_count == 0) {
579 * Either the num_entries element was originally zero or it was
580 * a NULL element and repaired to an Integer of value zero.
581 * In either case, repair it by setting num_entries to be the
582 * actual size of the subpackage.
584 expected_count = sub_package->package.count;
585 (*sub_elements)->integer.value = expected_count;
588 /* Check the type of each subpackage element */
591 acpi_ns_check_package_elements(info,
595 (expected_count - 1),
597 if (ACPI_FAILURE(status)) {
602 default: /* Should not get here, type was validated by caller */
604 return (AE_AML_INTERNAL);
614 /* The subpackage count was smaller than required */
616 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags,
617 "Return SubPackage[%u] is too small - found %u elements, expected %u",
618 i, sub_package->package.count, expected_count));
620 return (AE_AML_OPERAND_VALUE);
623 /*******************************************************************************
625 * FUNCTION: acpi_ns_check_package_elements
627 * PARAMETERS: info - Method execution information block
628 * elements - Pointer to the package elements array
629 * type1 - Object type for first group
630 * count1 - Count for first group
631 * type2 - Object type for second group
632 * count2 - Count for second group
633 * start_index - Start of the first group of elements
637 * DESCRIPTION: Check that all elements of a package are of the correct object
638 * type. Supports up to two groups of different object types.
640 ******************************************************************************/
643 acpi_ns_check_package_elements(struct acpi_evaluate_info *info,
644 union acpi_operand_object **elements,
647 u8 type2, u32 count2, u32 start_index)
649 union acpi_operand_object **this_element = elements;
654 * Up to two groups of package elements are supported by the data
655 * structure. All elements in each group must be of the same type.
656 * The second group can have a count of zero.
658 for (i = 0; i < count1; i++) {
659 status = acpi_ns_check_object_type(info, this_element,
660 type1, i + start_index);
661 if (ACPI_FAILURE(status)) {
667 for (i = 0; i < count2; i++) {
668 status = acpi_ns_check_object_type(info, this_element,
670 (i + count1 + start_index));
671 if (ACPI_FAILURE(status)) {