Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: nsprepkg - Validation of package objects for predefined names |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 25f044e | 2013-01-25 05:38:56 +0000 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2013, Intel Corp. |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 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 |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 54 | acpi_ns_check_package_list(struct acpi_evaluate_info *info, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 55 | const union acpi_predefined_info *package, |
| 56 | union acpi_operand_object **elements, u32 count); |
| 57 | |
| 58 | static acpi_status |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 59 | acpi_ns_check_package_elements(struct acpi_evaluate_info *info, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 60 | union acpi_operand_object **elements, |
| 61 | u8 type1, |
| 62 | u32 count1, |
| 63 | u8 type2, u32 count2, u32 start_index); |
| 64 | |
| 65 | /******************************************************************************* |
| 66 | * |
| 67 | * FUNCTION: acpi_ns_check_package |
| 68 | * |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 69 | * PARAMETERS: info - Method execution information block |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 70 | * return_object_ptr - Pointer to the object returned from the |
| 71 | * evaluation of a method or object |
| 72 | * |
| 73 | * RETURN: Status |
| 74 | * |
| 75 | * DESCRIPTION: Check a returned package object for the correct count and |
| 76 | * correct type of all sub-objects. |
| 77 | * |
| 78 | ******************************************************************************/ |
| 79 | |
| 80 | acpi_status |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 81 | acpi_ns_check_package(struct acpi_evaluate_info *info, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 82 | union acpi_operand_object **return_object_ptr) |
| 83 | { |
| 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; |
| 88 | u32 expected_count; |
| 89 | u32 count; |
| 90 | u32 i; |
| 91 | |
| 92 | ACPI_FUNCTION_NAME(ns_check_package); |
| 93 | |
| 94 | /* The package info for this name is in the next table entry */ |
| 95 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 96 | package = info->predefined + 1; |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 97 | |
| 98 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, |
| 99 | "%s Validating return Package of Type %X, Count %X\n", |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 100 | info->full_pathname, package->ret_info.type, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 101 | return_object->package.count)); |
| 102 | |
| 103 | /* |
| 104 | * For variable-length Packages, we can safely remove all embedded |
| 105 | * and trailing NULL package elements |
| 106 | */ |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 107 | acpi_ns_remove_null_elements(info, package->ret_info.type, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 108 | return_object); |
| 109 | |
| 110 | /* Extract package count and elements array */ |
| 111 | |
| 112 | elements = return_object->package.elements; |
| 113 | count = return_object->package.count; |
| 114 | |
Bob Moore | 02d4fb3 | 2013-03-08 09:23:51 +0000 | [diff] [blame] | 115 | /* |
| 116 | * Most packages must have at least one element. The only exception |
| 117 | * is the variable-length package (ACPI_PTYPE1_VAR). |
| 118 | */ |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 119 | if (!count) { |
Bob Moore | 02d4fb3 | 2013-03-08 09:23:51 +0000 | [diff] [blame] | 120 | if (package->ret_info.type == ACPI_PTYPE1_VAR) { |
| 121 | return (AE_OK); |
| 122 | } |
| 123 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 124 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, |
| 125 | info->node_flags, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 126 | "Return Package has no elements (empty)")); |
| 127 | |
| 128 | return (AE_AML_OPERAND_VALUE); |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * Decode the type of the expected package contents |
| 133 | * |
| 134 | * PTYPE1 packages contain no subpackages |
| 135 | * PTYPE2 packages contain sub-packages |
| 136 | */ |
| 137 | switch (package->ret_info.type) { |
| 138 | case ACPI_PTYPE1_FIXED: |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 139 | /* |
| 140 | * The package count is fixed and there are no sub-packages |
| 141 | * |
| 142 | * If package is too small, exit. |
| 143 | * If package is larger than expected, issue warning but continue |
| 144 | */ |
| 145 | expected_count = |
| 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", |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 153 | info->full_pathname, count, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 154 | expected_count)); |
| 155 | } |
| 156 | |
| 157 | /* Validate all elements of the returned package */ |
| 158 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 159 | status = acpi_ns_check_package_elements(info, elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 160 | package->ret_info. |
| 161 | object_type1, |
| 162 | package->ret_info. |
| 163 | count1, |
| 164 | package->ret_info. |
| 165 | object_type2, |
| 166 | package->ret_info. |
| 167 | count2, 0); |
| 168 | break; |
| 169 | |
| 170 | case ACPI_PTYPE1_VAR: |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 171 | /* |
| 172 | * The package count is variable, there are no sub-packages, and all |
| 173 | * elements must be of the same type |
| 174 | */ |
| 175 | for (i = 0; i < count; i++) { |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 176 | status = acpi_ns_check_object_type(info, elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 177 | package->ret_info. |
| 178 | object_type1, i); |
| 179 | if (ACPI_FAILURE(status)) { |
| 180 | return (status); |
| 181 | } |
| 182 | elements++; |
| 183 | } |
| 184 | break; |
| 185 | |
| 186 | case ACPI_PTYPE1_OPTION: |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 187 | /* |
| 188 | * The package count is variable, there are no sub-packages. There are |
| 189 | * a fixed number of required elements, and a variable number of |
| 190 | * optional elements. |
| 191 | * |
| 192 | * Check if package is at least as large as the minimum required |
| 193 | */ |
| 194 | expected_count = package->ret_info3.count; |
| 195 | if (count < expected_count) { |
| 196 | goto package_too_small; |
| 197 | } |
| 198 | |
| 199 | /* Variable number of sub-objects */ |
| 200 | |
| 201 | for (i = 0; i < count; i++) { |
| 202 | if (i < package->ret_info3.count) { |
| 203 | |
| 204 | /* These are the required package elements (0, 1, or 2) */ |
| 205 | |
| 206 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 207 | acpi_ns_check_object_type(info, elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 208 | package-> |
| 209 | ret_info3. |
| 210 | object_type[i], |
| 211 | i); |
| 212 | if (ACPI_FAILURE(status)) { |
| 213 | return (status); |
| 214 | } |
| 215 | } else { |
| 216 | /* These are the optional package elements */ |
| 217 | |
| 218 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 219 | acpi_ns_check_object_type(info, elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 220 | package-> |
| 221 | ret_info3. |
| 222 | tail_object_type, |
| 223 | i); |
| 224 | if (ACPI_FAILURE(status)) { |
| 225 | return (status); |
| 226 | } |
| 227 | } |
| 228 | elements++; |
| 229 | } |
| 230 | break; |
| 231 | |
| 232 | case ACPI_PTYPE2_REV_FIXED: |
| 233 | |
| 234 | /* First element is the (Integer) revision */ |
| 235 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 236 | status = acpi_ns_check_object_type(info, elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 237 | ACPI_RTYPE_INTEGER, 0); |
| 238 | if (ACPI_FAILURE(status)) { |
| 239 | return (status); |
| 240 | } |
| 241 | |
| 242 | elements++; |
| 243 | count--; |
| 244 | |
| 245 | /* Examine the sub-packages */ |
| 246 | |
| 247 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 248 | acpi_ns_check_package_list(info, package, elements, count); |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 249 | break; |
| 250 | |
| 251 | case ACPI_PTYPE2_PKG_COUNT: |
| 252 | |
| 253 | /* First element is the (Integer) count of sub-packages to follow */ |
| 254 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 255 | status = acpi_ns_check_object_type(info, elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 256 | ACPI_RTYPE_INTEGER, 0); |
| 257 | if (ACPI_FAILURE(status)) { |
| 258 | return (status); |
| 259 | } |
| 260 | |
| 261 | /* |
| 262 | * Count cannot be larger than the parent package length, but allow it |
| 263 | * to be smaller. The >= accounts for the Integer above. |
| 264 | */ |
| 265 | expected_count = (u32)(*elements)->integer.value; |
| 266 | if (expected_count >= count) { |
| 267 | goto package_too_small; |
| 268 | } |
| 269 | |
| 270 | count = expected_count; |
| 271 | elements++; |
| 272 | |
| 273 | /* Examine the sub-packages */ |
| 274 | |
| 275 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 276 | acpi_ns_check_package_list(info, package, elements, count); |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 277 | break; |
| 278 | |
| 279 | case ACPI_PTYPE2: |
| 280 | case ACPI_PTYPE2_FIXED: |
| 281 | case ACPI_PTYPE2_MIN: |
| 282 | case ACPI_PTYPE2_COUNT: |
| 283 | case ACPI_PTYPE2_FIX_VAR: |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 284 | /* |
| 285 | * These types all return a single Package that consists of a |
| 286 | * variable number of sub-Packages. |
| 287 | * |
| 288 | * First, ensure that the first element is a sub-Package. If not, |
| 289 | * the BIOS may have incorrectly returned the object as a single |
| 290 | * package instead of a Package of Packages (a common error if |
| 291 | * there is only one entry). We may be able to repair this by |
| 292 | * wrapping the returned Package with a new outer Package. |
| 293 | */ |
| 294 | if (*elements |
| 295 | && ((*elements)->common.type != ACPI_TYPE_PACKAGE)) { |
| 296 | |
| 297 | /* Create the new outer package and populate it */ |
| 298 | |
| 299 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 300 | acpi_ns_wrap_with_package(info, return_object, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 301 | return_object_ptr); |
| 302 | if (ACPI_FAILURE(status)) { |
| 303 | return (status); |
| 304 | } |
| 305 | |
| 306 | /* Update locals to point to the new package (of 1 element) */ |
| 307 | |
| 308 | return_object = *return_object_ptr; |
| 309 | elements = return_object->package.elements; |
| 310 | count = 1; |
| 311 | } |
| 312 | |
| 313 | /* Examine the sub-packages */ |
| 314 | |
| 315 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 316 | acpi_ns_check_package_list(info, package, elements, count); |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 317 | break; |
| 318 | |
| 319 | default: |
| 320 | |
| 321 | /* Should not get here if predefined info table is correct */ |
| 322 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 323 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, |
| 324 | info->node_flags, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 325 | "Invalid internal return type in table entry: %X", |
| 326 | package->ret_info.type)); |
| 327 | |
| 328 | return (AE_AML_INTERNAL); |
| 329 | } |
| 330 | |
| 331 | return (status); |
| 332 | |
| 333 | package_too_small: |
| 334 | |
| 335 | /* Error exit for the case with an incorrect package count */ |
| 336 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 337 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 338 | "Return Package is too small - found %u elements, expected %u", |
| 339 | count, expected_count)); |
| 340 | |
| 341 | return (AE_AML_OPERAND_VALUE); |
| 342 | } |
| 343 | |
| 344 | /******************************************************************************* |
| 345 | * |
| 346 | * FUNCTION: acpi_ns_check_package_list |
| 347 | * |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 348 | * PARAMETERS: info - Method execution information block |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 349 | * package - Pointer to package-specific info for method |
| 350 | * elements - Element list of parent package. All elements |
| 351 | * of this list should be of type Package. |
| 352 | * count - Count of subpackages |
| 353 | * |
| 354 | * RETURN: Status |
| 355 | * |
| 356 | * DESCRIPTION: Examine a list of subpackages |
| 357 | * |
| 358 | ******************************************************************************/ |
| 359 | |
| 360 | static acpi_status |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 361 | acpi_ns_check_package_list(struct acpi_evaluate_info *info, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 362 | const union acpi_predefined_info *package, |
| 363 | union acpi_operand_object **elements, u32 count) |
| 364 | { |
| 365 | union acpi_operand_object *sub_package; |
| 366 | union acpi_operand_object **sub_elements; |
| 367 | acpi_status status; |
| 368 | u32 expected_count; |
| 369 | u32 i; |
| 370 | u32 j; |
| 371 | |
| 372 | /* |
| 373 | * Validate each sub-Package in the parent Package |
| 374 | * |
| 375 | * NOTE: assumes list of sub-packages contains no NULL elements. |
| 376 | * Any NULL elements should have been removed by earlier call |
| 377 | * to acpi_ns_remove_null_elements. |
| 378 | */ |
| 379 | for (i = 0; i < count; i++) { |
| 380 | sub_package = *elements; |
| 381 | sub_elements = sub_package->package.elements; |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 382 | info->parent_package = sub_package; |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 383 | |
| 384 | /* Each sub-object must be of type Package */ |
| 385 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 386 | status = acpi_ns_check_object_type(info, &sub_package, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 387 | ACPI_RTYPE_PACKAGE, i); |
| 388 | if (ACPI_FAILURE(status)) { |
| 389 | return (status); |
| 390 | } |
| 391 | |
| 392 | /* Examine the different types of expected sub-packages */ |
| 393 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 394 | info->parent_package = sub_package; |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 395 | switch (package->ret_info.type) { |
| 396 | case ACPI_PTYPE2: |
| 397 | case ACPI_PTYPE2_PKG_COUNT: |
| 398 | case ACPI_PTYPE2_REV_FIXED: |
| 399 | |
| 400 | /* Each subpackage has a fixed number of elements */ |
| 401 | |
| 402 | expected_count = |
| 403 | package->ret_info.count1 + package->ret_info.count2; |
| 404 | if (sub_package->package.count < expected_count) { |
| 405 | goto package_too_small; |
| 406 | } |
| 407 | |
| 408 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 409 | acpi_ns_check_package_elements(info, sub_elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 410 | package->ret_info. |
| 411 | object_type1, |
| 412 | package->ret_info. |
| 413 | count1, |
| 414 | package->ret_info. |
| 415 | object_type2, |
| 416 | package->ret_info. |
| 417 | count2, 0); |
| 418 | if (ACPI_FAILURE(status)) { |
| 419 | return (status); |
| 420 | } |
| 421 | break; |
| 422 | |
| 423 | case ACPI_PTYPE2_FIX_VAR: |
| 424 | /* |
| 425 | * Each subpackage has a fixed number of elements and an |
| 426 | * optional element |
| 427 | */ |
| 428 | expected_count = |
| 429 | package->ret_info.count1 + package->ret_info.count2; |
| 430 | if (sub_package->package.count < expected_count) { |
| 431 | goto package_too_small; |
| 432 | } |
| 433 | |
| 434 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 435 | acpi_ns_check_package_elements(info, sub_elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 436 | package->ret_info. |
| 437 | object_type1, |
| 438 | package->ret_info. |
| 439 | count1, |
| 440 | package->ret_info. |
| 441 | object_type2, |
| 442 | sub_package->package. |
| 443 | count - |
| 444 | package->ret_info. |
| 445 | count1, 0); |
| 446 | if (ACPI_FAILURE(status)) { |
| 447 | return (status); |
| 448 | } |
| 449 | break; |
| 450 | |
| 451 | case ACPI_PTYPE2_FIXED: |
| 452 | |
| 453 | /* Each sub-package has a fixed length */ |
| 454 | |
| 455 | expected_count = package->ret_info2.count; |
| 456 | if (sub_package->package.count < expected_count) { |
| 457 | goto package_too_small; |
| 458 | } |
| 459 | |
| 460 | /* Check the type of each sub-package element */ |
| 461 | |
| 462 | for (j = 0; j < expected_count; j++) { |
| 463 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 464 | acpi_ns_check_object_type(info, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 465 | &sub_elements[j], |
| 466 | package-> |
| 467 | ret_info2. |
| 468 | object_type[j], |
| 469 | j); |
| 470 | if (ACPI_FAILURE(status)) { |
| 471 | return (status); |
| 472 | } |
| 473 | } |
| 474 | break; |
| 475 | |
| 476 | case ACPI_PTYPE2_MIN: |
| 477 | |
| 478 | /* Each sub-package has a variable but minimum length */ |
| 479 | |
| 480 | expected_count = package->ret_info.count1; |
| 481 | if (sub_package->package.count < expected_count) { |
| 482 | goto package_too_small; |
| 483 | } |
| 484 | |
| 485 | /* Check the type of each sub-package element */ |
| 486 | |
| 487 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 488 | acpi_ns_check_package_elements(info, sub_elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 489 | package->ret_info. |
| 490 | object_type1, |
| 491 | sub_package->package. |
| 492 | count, 0, 0, 0); |
| 493 | if (ACPI_FAILURE(status)) { |
| 494 | return (status); |
| 495 | } |
| 496 | break; |
| 497 | |
| 498 | case ACPI_PTYPE2_COUNT: |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 499 | /* |
| 500 | * First element is the (Integer) count of elements, including |
| 501 | * the count field (the ACPI name is num_elements) |
| 502 | */ |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 503 | status = acpi_ns_check_object_type(info, sub_elements, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 504 | ACPI_RTYPE_INTEGER, |
| 505 | 0); |
| 506 | if (ACPI_FAILURE(status)) { |
| 507 | return (status); |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * Make sure package is large enough for the Count and is |
| 512 | * is as large as the minimum size |
| 513 | */ |
| 514 | expected_count = (u32)(*sub_elements)->integer.value; |
| 515 | if (sub_package->package.count < expected_count) { |
| 516 | goto package_too_small; |
| 517 | } |
| 518 | if (sub_package->package.count < |
| 519 | package->ret_info.count1) { |
| 520 | expected_count = package->ret_info.count1; |
| 521 | goto package_too_small; |
| 522 | } |
| 523 | if (expected_count == 0) { |
| 524 | /* |
| 525 | * Either the num_entries element was originally zero or it was |
| 526 | * a NULL element and repaired to an Integer of value zero. |
| 527 | * In either case, repair it by setting num_entries to be the |
| 528 | * actual size of the subpackage. |
| 529 | */ |
| 530 | expected_count = sub_package->package.count; |
| 531 | (*sub_elements)->integer.value = expected_count; |
| 532 | } |
| 533 | |
| 534 | /* Check the type of each sub-package element */ |
| 535 | |
| 536 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 537 | acpi_ns_check_package_elements(info, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 538 | (sub_elements + 1), |
| 539 | package->ret_info. |
| 540 | object_type1, |
| 541 | (expected_count - 1), |
| 542 | 0, 0, 1); |
| 543 | if (ACPI_FAILURE(status)) { |
| 544 | return (status); |
| 545 | } |
| 546 | break; |
| 547 | |
| 548 | default: /* Should not get here, type was validated by caller */ |
| 549 | |
| 550 | return (AE_AML_INTERNAL); |
| 551 | } |
| 552 | |
| 553 | elements++; |
| 554 | } |
| 555 | |
| 556 | return (AE_OK); |
| 557 | |
| 558 | package_too_small: |
| 559 | |
| 560 | /* The sub-package count was smaller than required */ |
| 561 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 562 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 563 | "Return Sub-Package[%u] is too small - found %u elements, expected %u", |
| 564 | i, sub_package->package.count, expected_count)); |
| 565 | |
| 566 | return (AE_AML_OPERAND_VALUE); |
| 567 | } |
| 568 | |
| 569 | /******************************************************************************* |
| 570 | * |
| 571 | * FUNCTION: acpi_ns_check_package_elements |
| 572 | * |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 573 | * PARAMETERS: info - Method execution information block |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 574 | * elements - Pointer to the package elements array |
| 575 | * type1 - Object type for first group |
| 576 | * count1 - Count for first group |
| 577 | * type2 - Object type for second group |
| 578 | * count2 - Count for second group |
| 579 | * start_index - Start of the first group of elements |
| 580 | * |
| 581 | * RETURN: Status |
| 582 | * |
| 583 | * DESCRIPTION: Check that all elements of a package are of the correct object |
| 584 | * type. Supports up to two groups of different object types. |
| 585 | * |
| 586 | ******************************************************************************/ |
| 587 | |
| 588 | static acpi_status |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 589 | acpi_ns_check_package_elements(struct acpi_evaluate_info *info, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 590 | union acpi_operand_object **elements, |
| 591 | u8 type1, |
| 592 | u32 count1, |
| 593 | u8 type2, u32 count2, u32 start_index) |
| 594 | { |
| 595 | union acpi_operand_object **this_element = elements; |
| 596 | acpi_status status; |
| 597 | u32 i; |
| 598 | |
| 599 | /* |
| 600 | * Up to two groups of package elements are supported by the data |
| 601 | * structure. All elements in each group must be of the same type. |
| 602 | * The second group can have a count of zero. |
| 603 | */ |
| 604 | for (i = 0; i < count1; i++) { |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 605 | status = acpi_ns_check_object_type(info, this_element, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 606 | type1, i + start_index); |
| 607 | if (ACPI_FAILURE(status)) { |
| 608 | return (status); |
| 609 | } |
| 610 | this_element++; |
| 611 | } |
| 612 | |
| 613 | for (i = 0; i < count2; i++) { |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 614 | status = acpi_ns_check_object_type(info, this_element, |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 615 | type2, |
| 616 | (i + count1 + start_index)); |
| 617 | if (ACPI_FAILURE(status)) { |
| 618 | return (status); |
| 619 | } |
| 620 | this_element++; |
| 621 | } |
| 622 | |
| 623 | return (AE_OK); |
| 624 | } |