1 /******************************************************************************* 2 * 3 * Module Name: nseval - Object evaluation, includes control method execution 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2019, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 ***************************************************************************** 116 * 117 * Alternatively, you may choose to be licensed under the terms of the 118 * following license: 119 * 120 * Redistribution and use in source and binary forms, with or without 121 * modification, are permitted provided that the following conditions 122 * are met: 123 * 1. Redistributions of source code must retain the above copyright 124 * notice, this list of conditions, and the following disclaimer, 125 * without modification. 126 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 127 * substantially similar to the "NO WARRANTY" disclaimer below 128 * ("Disclaimer") and any redistribution must be conditioned upon 129 * including a substantially similar Disclaimer requirement for further 130 * binary redistribution. 131 * 3. Neither the names of the above-listed copyright holders nor the names 132 * of any contributors may be used to endorse or promote products derived 133 * from this software without specific prior written permission. 134 * 135 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 136 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 137 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 138 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 139 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 140 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 141 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 142 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 143 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 144 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 145 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 146 * 147 * Alternatively, you may choose to be licensed under the terms of the 148 * GNU General Public License ("GPL") version 2 as published by the Free 149 * Software Foundation. 150 * 151 *****************************************************************************/ 152 153 #include <contrib/dev/acpica/include/acpi.h> 154 #include <contrib/dev/acpica/include/accommon.h> 155 #include <contrib/dev/acpica/include/acparser.h> 156 #include <contrib/dev/acpica/include/acinterp.h> 157 #include <contrib/dev/acpica/include/acnamesp.h> 158 159 160 #define _COMPONENT ACPI_NAMESPACE 161 ACPI_MODULE_NAME ("nseval") 162 163 /* Local prototypes */ 164 165 static void 166 AcpiNsExecModuleCode ( 167 ACPI_OPERAND_OBJECT *MethodObj, 168 ACPI_EVALUATE_INFO *Info); 169 170 171 /******************************************************************************* 172 * 173 * FUNCTION: AcpiNsEvaluate 174 * 175 * PARAMETERS: Info - Evaluation info block, contains these fields 176 * and more: 177 * PrefixNode - Prefix or Method/Object Node to execute 178 * RelativePath - Name of method to execute, If NULL, the 179 * Node is the object to execute 180 * Parameters - List of parameters to pass to the method, 181 * terminated by NULL. Params itself may be 182 * NULL if no parameters are being passed. 183 * ParameterType - Type of Parameter list 184 * ReturnObject - Where to put method's return value (if 185 * any). If NULL, no value is returned. 186 * Flags - ACPI_IGNORE_RETURN_VALUE to delete return 187 * 188 * RETURN: Status 189 * 190 * DESCRIPTION: Execute a control method or return the current value of an 191 * ACPI namespace object. 192 * 193 * MUTEX: Locks interpreter 194 * 195 ******************************************************************************/ 196 197 ACPI_STATUS 198 AcpiNsEvaluate ( 199 ACPI_EVALUATE_INFO *Info) 200 { 201 ACPI_STATUS Status; 202 203 204 ACPI_FUNCTION_TRACE (NsEvaluate); 205 206 207 if (!Info) 208 { 209 return_ACPI_STATUS (AE_BAD_PARAMETER); 210 } 211 212 if (!Info->Node) 213 { 214 /* 215 * Get the actual namespace node for the target object if we 216 * need to. Handles these cases: 217 * 218 * 1) Null node, valid pathname from root (absolute path) 219 * 2) Node and valid pathname (path relative to Node) 220 * 3) Node, Null pathname 221 */ 222 Status = AcpiNsGetNode (Info->PrefixNode, Info->RelativePathname, 223 ACPI_NS_NO_UPSEARCH, &Info->Node); 224 if (ACPI_FAILURE (Status)) 225 { 226 return_ACPI_STATUS (Status); 227 } 228 } 229 230 /* 231 * For a method alias, we must grab the actual method node so that 232 * proper scoping context will be established before execution. 233 */ 234 if (AcpiNsGetType (Info->Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) 235 { 236 Info->Node = ACPI_CAST_PTR ( 237 ACPI_NAMESPACE_NODE, Info->Node->Object); 238 } 239 240 /* Complete the info block initialization */ 241 242 Info->ReturnObject = NULL; 243 Info->NodeFlags = Info->Node->Flags; 244 Info->ObjDesc = AcpiNsGetAttachedObject (Info->Node); 245 246 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", 247 Info->RelativePathname, Info->Node, 248 AcpiNsGetAttachedObject (Info->Node))); 249 250 /* Get info if we have a predefined name (_HID, etc.) */ 251 252 Info->Predefined = AcpiUtMatchPredefinedMethod (Info->Node->Name.Ascii); 253 254 /* Get the full pathname to the object, for use in warning messages */ 255 256 Info->FullPathname = AcpiNsGetNormalizedPathname (Info->Node, TRUE); 257 if (!Info->FullPathname) 258 { 259 return_ACPI_STATUS (AE_NO_MEMORY); 260 } 261 262 /* Optional object evaluation log */ 263 264 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EVALUATION, 265 "%-26s: %s (%s)\n", " Enter evaluation", 266 &Info->FullPathname[1], AcpiUtGetTypeName (Info->Node->Type))); 267 268 /* Count the number of arguments being passed in */ 269 270 Info->ParamCount = 0; 271 if (Info->Parameters) 272 { 273 while (Info->Parameters[Info->ParamCount]) 274 { 275 Info->ParamCount++; 276 } 277 278 /* Warn on impossible argument count */ 279 280 if (Info->ParamCount > ACPI_METHOD_NUM_ARGS) 281 { 282 ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS, 283 "Excess arguments (%u) - using only %u", 284 Info->ParamCount, ACPI_METHOD_NUM_ARGS)); 285 286 Info->ParamCount = ACPI_METHOD_NUM_ARGS; 287 } 288 } 289 290 /* 291 * For predefined names: Check that the declared argument count 292 * matches the ACPI spec -- otherwise this is a BIOS error. 293 */ 294 AcpiNsCheckAcpiCompliance (Info->FullPathname, Info->Node, 295 Info->Predefined); 296 297 /* 298 * For all names: Check that the incoming argument count for 299 * this method/object matches the actual ASL/AML definition. 300 */ 301 AcpiNsCheckArgumentCount (Info->FullPathname, Info->Node, 302 Info->ParamCount, Info->Predefined); 303 304 /* For predefined names: Typecheck all incoming arguments */ 305 306 AcpiNsCheckArgumentTypes (Info); 307 308 /* 309 * Three major evaluation cases: 310 * 311 * 1) Object types that cannot be evaluated by definition 312 * 2) The object is a control method -- execute it 313 * 3) The object is not a method -- just return it's current value 314 */ 315 switch (AcpiNsGetType (Info->Node)) 316 { 317 case ACPI_TYPE_ANY: 318 case ACPI_TYPE_DEVICE: 319 case ACPI_TYPE_EVENT: 320 case ACPI_TYPE_MUTEX: 321 case ACPI_TYPE_REGION: 322 case ACPI_TYPE_THERMAL: 323 case ACPI_TYPE_LOCAL_SCOPE: 324 /* 325 * 1) Disallow evaluation of these object types. For these, 326 * object evaluation is undefined. 327 */ 328 ACPI_ERROR ((AE_INFO, 329 "%s: This object type [%s] " 330 "never contains data and cannot be evaluated", 331 Info->FullPathname, AcpiUtGetTypeName (Info->Node->Type))); 332 333 Status = AE_TYPE; 334 goto Cleanup; 335 336 case ACPI_TYPE_METHOD: 337 /* 338 * 2) Object is a control method - execute it 339 */ 340 341 /* Verify that there is a method object associated with this node */ 342 343 if (!Info->ObjDesc) 344 { 345 ACPI_ERROR ((AE_INFO, "%s: Method has no attached sub-object", 346 Info->FullPathname)); 347 Status = AE_NULL_OBJECT; 348 goto Cleanup; 349 } 350 351 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 352 "**** Execute method [%s] at AML address %p length %X\n", 353 Info->FullPathname, 354 Info->ObjDesc->Method.AmlStart + 1, 355 Info->ObjDesc->Method.AmlLength - 1)); 356 357 /* 358 * Any namespace deletion must acquire both the namespace and 359 * interpreter locks to ensure that no thread is using the portion of 360 * the namespace that is being deleted. 361 * 362 * Execute the method via the interpreter. The interpreter is locked 363 * here before calling into the AML parser 364 */ 365 AcpiExEnterInterpreter (); 366 Status = AcpiPsExecuteMethod (Info); 367 AcpiExExitInterpreter (); 368 break; 369 370 default: 371 /* 372 * 3) All other non-method objects -- get the current object value 373 */ 374 375 /* 376 * Some objects require additional resolution steps (e.g., the Node 377 * may be a field that must be read, etc.) -- we can't just grab 378 * the object out of the node. 379 * 380 * Use ResolveNodeToValue() to get the associated value. 381 * 382 * NOTE: we can get away with passing in NULL for a walk state because 383 * the Node is guaranteed to not be a reference to either a method 384 * local or a method argument (because this interface is never called 385 * from a running method.) 386 * 387 * Even though we do not directly invoke the interpreter for object 388 * resolution, we must lock it because we could access an OpRegion. 389 * The OpRegion access code assumes that the interpreter is locked. 390 */ 391 AcpiExEnterInterpreter (); 392 393 /* TBD: ResolveNodeToValue has a strange interface, fix */ 394 395 Info->ReturnObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->Node); 396 397 Status = AcpiExResolveNodeToValue (ACPI_CAST_INDIRECT_PTR ( 398 ACPI_NAMESPACE_NODE, &Info->ReturnObject), NULL); 399 AcpiExExitInterpreter (); 400 401 if (ACPI_FAILURE (Status)) 402 { 403 Info->ReturnObject = NULL; 404 goto Cleanup; 405 } 406 407 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returned object %p [%s]\n", 408 Info->ReturnObject, 409 AcpiUtGetObjectTypeName (Info->ReturnObject))); 410 411 Status = AE_CTRL_RETURN_VALUE; /* Always has a "return value" */ 412 break; 413 } 414 415 /* 416 * For predefined names, check the return value against the ACPI 417 * specification. Some incorrect return value types are repaired. 418 */ 419 (void) AcpiNsCheckReturnValue (Info->Node, Info, Info->ParamCount, 420 Status, &Info->ReturnObject); 421 422 /* Check if there is a return value that must be dealt with */ 423 424 if (Status == AE_CTRL_RETURN_VALUE) 425 { 426 /* If caller does not want the return value, delete it */ 427 428 if (Info->Flags & ACPI_IGNORE_RETURN_VALUE) 429 { 430 AcpiUtRemoveReference (Info->ReturnObject); 431 Info->ReturnObject = NULL; 432 } 433 434 /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */ 435 436 Status = AE_OK; 437 } 438 else if (ACPI_FAILURE(Status)) 439 { 440 /* If ReturnObject exists, delete it */ 441 442 if (Info->ReturnObject) 443 { 444 AcpiUtRemoveReference (Info->ReturnObject); 445 Info->ReturnObject = NULL; 446 } 447 } 448 449 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 450 "*** Completed evaluation of object %s ***\n", 451 Info->RelativePathname)); 452 453 Cleanup: 454 /* Optional object evaluation log */ 455 456 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EVALUATION, 457 "%-26s: %s\n", " Exit evaluation", 458 &Info->FullPathname[1])); 459 460 /* 461 * Namespace was unlocked by the handling AcpiNs* function, so we 462 * just free the pathname and return 463 */ 464 ACPI_FREE (Info->FullPathname); 465 Info->FullPathname = NULL; 466 return_ACPI_STATUS (Status); 467 } 468 469 470 /******************************************************************************* 471 * 472 * FUNCTION: AcpiNsExecModuleCodeList 473 * 474 * PARAMETERS: None 475 * 476 * RETURN: None. Exceptions during method execution are ignored, since 477 * we cannot abort a table load. 478 * 479 * DESCRIPTION: Execute all elements of the global module-level code list. 480 * Each element is executed as a single control method. 481 * 482 * NOTE: With this option enabled, each block of detected executable AML 483 * code that is outside of any control method is wrapped with a temporary 484 * control method object and placed on a global list. The methods on this 485 * list are executed below. 486 * 487 * This function executes the module-level code for all tables only after 488 * all of the tables have been loaded. It is a legacy option and is 489 * not compatible with other ACPI implementations. See AcpiNsLoadTable. 490 * 491 * This function will be removed when the legacy option is removed. 492 * 493 ******************************************************************************/ 494 495 void 496 AcpiNsExecModuleCodeList ( 497 void) 498 { 499 ACPI_OPERAND_OBJECT *Prev; 500 ACPI_OPERAND_OBJECT *Next; 501 ACPI_EVALUATE_INFO *Info; 502 UINT32 MethodCount = 0; 503 504 505 ACPI_FUNCTION_TRACE (NsExecModuleCodeList); 506 507 508 /* Exit now if the list is empty */ 509 510 Next = AcpiGbl_ModuleCodeList; 511 if (!Next) 512 { 513 ACPI_DEBUG_PRINT ((ACPI_DB_INIT_NAMES, 514 "Legacy MLC block list is empty\n")); 515 516 return_VOID; 517 } 518 519 /* Allocate the evaluation information block */ 520 521 Info = ACPI_ALLOCATE (sizeof (ACPI_EVALUATE_INFO)); 522 if (!Info) 523 { 524 return_VOID; 525 } 526 527 /* Walk the list, executing each "method" */ 528 529 while (Next) 530 { 531 Prev = Next; 532 Next = Next->Method.Mutex; 533 534 /* Clear the link field and execute the method */ 535 536 Prev->Method.Mutex = NULL; 537 AcpiNsExecModuleCode (Prev, Info); 538 MethodCount++; 539 540 /* Delete the (temporary) method object */ 541 542 AcpiUtRemoveReference (Prev); 543 } 544 545 ACPI_INFO (( 546 "Executed %u blocks of module-level executable AML code", 547 MethodCount)); 548 549 ACPI_FREE (Info); 550 AcpiGbl_ModuleCodeList = NULL; 551 return_VOID; 552 } 553 554 555 /******************************************************************************* 556 * 557 * FUNCTION: AcpiNsExecModuleCode 558 * 559 * PARAMETERS: MethodObj - Object container for the module-level code 560 * Info - Info block for method evaluation 561 * 562 * RETURN: None. Exceptions during method execution are ignored, since 563 * we cannot abort a table load. 564 * 565 * DESCRIPTION: Execute a control method containing a block of module-level 566 * executable AML code. The control method is temporarily 567 * installed to the root node, then evaluated. 568 * 569 ******************************************************************************/ 570 571 static void 572 AcpiNsExecModuleCode ( 573 ACPI_OPERAND_OBJECT *MethodObj, 574 ACPI_EVALUATE_INFO *Info) 575 { 576 ACPI_OPERAND_OBJECT *ParentObj; 577 ACPI_NAMESPACE_NODE *ParentNode; 578 ACPI_OBJECT_TYPE Type; 579 ACPI_STATUS Status; 580 581 582 ACPI_FUNCTION_TRACE (NsExecModuleCode); 583 584 585 /* 586 * Get the parent node. We cheat by using the NextObject field 587 * of the method object descriptor. 588 */ 589 ParentNode = ACPI_CAST_PTR ( 590 ACPI_NAMESPACE_NODE, MethodObj->Method.NextObject); 591 Type = AcpiNsGetType (ParentNode); 592 593 /* 594 * Get the region handler and save it in the method object. We may need 595 * this if an operation region declaration causes a _REG method to be run. 596 * 597 * We can't do this in AcpiPsLinkModuleCode because 598 * AcpiGbl_RootNode->Object is NULL at PASS1. 599 */ 600 if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object) 601 { 602 MethodObj->Method.Dispatch.Handler = 603 ParentNode->Object->Device.Handler; 604 } 605 606 /* Must clear NextObject (AcpiNsAttachObject needs the field) */ 607 608 MethodObj->Method.NextObject = NULL; 609 610 /* Initialize the evaluation information block */ 611 612 memset (Info, 0, sizeof (ACPI_EVALUATE_INFO)); 613 Info->PrefixNode = ParentNode; 614 615 /* 616 * Get the currently attached parent object. Add a reference, 617 * because the ref count will be decreased when the method object 618 * is installed to the parent node. 619 */ 620 ParentObj = AcpiNsGetAttachedObject (ParentNode); 621 if (ParentObj) 622 { 623 AcpiUtAddReference (ParentObj); 624 } 625 626 /* Install the method (module-level code) in the parent node */ 627 628 Status = AcpiNsAttachObject (ParentNode, MethodObj, ACPI_TYPE_METHOD); 629 if (ACPI_FAILURE (Status)) 630 { 631 goto Exit; 632 } 633 634 /* Execute the parent node as a control method */ 635 636 Status = AcpiNsEvaluate (Info); 637 638 ACPI_DEBUG_PRINT ((ACPI_DB_INIT_NAMES, 639 "Executed module-level code at %p\n", 640 MethodObj->Method.AmlStart)); 641 642 /* Delete a possible implicit return value (in slack mode) */ 643 644 if (Info->ReturnObject) 645 { 646 AcpiUtRemoveReference (Info->ReturnObject); 647 } 648 649 /* Detach the temporary method object */ 650 651 AcpiNsDetachObject (ParentNode); 652 653 /* Restore the original parent object */ 654 655 if (ParentObj) 656 { 657 Status = AcpiNsAttachObject (ParentNode, ParentObj, Type); 658 } 659 else 660 { 661 ParentNode->Type = (UINT8) Type; 662 } 663 664 Exit: 665 if (ParentObj) 666 { 667 AcpiUtRemoveReference (ParentObj); 668 } 669 return_VOID; 670 } 671