1 /****************************************************************************** 2 * 3 * Module Name: exoparg2 - AML execution - opcodes with 2 arguments 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2015, 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 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116 #include "acpi.h" 117 #include "accommon.h" 118 #include "acparser.h" 119 #include "acinterp.h" 120 #include "acevents.h" 121 #include "amlcode.h" 122 123 124 #define _COMPONENT ACPI_EXECUTER 125 ACPI_MODULE_NAME ("exoparg2") 126 127 128 /*! 129 * Naming convention for AML interpreter execution routines. 130 * 131 * The routines that begin execution of AML opcodes are named with a common 132 * convention based upon the number of arguments, the number of target operands, 133 * and whether or not a value is returned: 134 * 135 * AcpiExOpcode_xA_yT_zR 136 * 137 * Where: 138 * 139 * xA - ARGUMENTS: The number of arguments (input operands) that are 140 * required for this opcode type (1 through 6 args). 141 * yT - TARGETS: The number of targets (output operands) that are required 142 * for this opcode type (0, 1, or 2 targets). 143 * zR - RETURN VALUE: Indicates whether this opcode type returns a value 144 * as the function return (0 or 1). 145 * 146 * The AcpiExOpcode* functions are called via the Dispatcher component with 147 * fully resolved operands. 148 !*/ 149 150 151 /******************************************************************************* 152 * 153 * FUNCTION: AcpiExOpcode_2A_0T_0R 154 * 155 * PARAMETERS: WalkState - Current walk state 156 * 157 * RETURN: Status 158 * 159 * DESCRIPTION: Execute opcode with two arguments, no target, and no return 160 * value. 161 * 162 * ALLOCATION: Deletes both operands 163 * 164 ******************************************************************************/ 165 166 ACPI_STATUS 167 AcpiExOpcode_2A_0T_0R ( 168 ACPI_WALK_STATE *WalkState) 169 { 170 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 171 ACPI_NAMESPACE_NODE *Node; 172 UINT32 Value; 173 ACPI_STATUS Status = AE_OK; 174 175 176 ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_0T_0R, 177 AcpiPsGetOpcodeName (WalkState->Opcode)); 178 179 180 /* Examine the opcode */ 181 182 switch (WalkState->Opcode) 183 { 184 case AML_NOTIFY_OP: /* Notify (NotifyObject, NotifyValue) */ 185 186 /* The first operand is a namespace node */ 187 188 Node = (ACPI_NAMESPACE_NODE *) Operand[0]; 189 190 /* Second value is the notify value */ 191 192 Value = (UINT32) Operand[1]->Integer.Value; 193 194 /* Are notifies allowed on this object? */ 195 196 if (!AcpiEvIsNotifyObject (Node)) 197 { 198 ACPI_ERROR ((AE_INFO, 199 "Unexpected notify object type [%s]", 200 AcpiUtGetTypeName (Node->Type))); 201 202 Status = AE_AML_OPERAND_TYPE; 203 break; 204 } 205 206 /* 207 * Dispatch the notify to the appropriate handler 208 * NOTE: the request is queued for execution after this method 209 * completes. The notify handlers are NOT invoked synchronously 210 * from this thread -- because handlers may in turn run other 211 * control methods. 212 */ 213 Status = AcpiEvQueueNotifyRequest (Node, Value); 214 break; 215 216 default: 217 218 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 219 WalkState->Opcode)); 220 Status = AE_AML_BAD_OPCODE; 221 } 222 223 return_ACPI_STATUS (Status); 224 } 225 226 227 /******************************************************************************* 228 * 229 * FUNCTION: AcpiExOpcode_2A_2T_1R 230 * 231 * PARAMETERS: WalkState - Current walk state 232 * 233 * RETURN: Status 234 * 235 * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets 236 * and one implicit return value. 237 * 238 ******************************************************************************/ 239 240 ACPI_STATUS 241 AcpiExOpcode_2A_2T_1R ( 242 ACPI_WALK_STATE *WalkState) 243 { 244 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 245 ACPI_OPERAND_OBJECT *ReturnDesc1 = NULL; 246 ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL; 247 ACPI_STATUS Status; 248 249 250 ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_2T_1R, 251 AcpiPsGetOpcodeName (WalkState->Opcode)); 252 253 254 /* Execute the opcode */ 255 256 switch (WalkState->Opcode) 257 { 258 case AML_DIVIDE_OP: 259 260 /* Divide (Dividend, Divisor, RemainderResult QuotientResult) */ 261 262 ReturnDesc1 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 263 if (!ReturnDesc1) 264 { 265 Status = AE_NO_MEMORY; 266 goto Cleanup; 267 } 268 269 ReturnDesc2 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 270 if (!ReturnDesc2) 271 { 272 Status = AE_NO_MEMORY; 273 goto Cleanup; 274 } 275 276 /* Quotient to ReturnDesc1, remainder to ReturnDesc2 */ 277 278 Status = AcpiUtDivide (Operand[0]->Integer.Value, 279 Operand[1]->Integer.Value, 280 &ReturnDesc1->Integer.Value, 281 &ReturnDesc2->Integer.Value); 282 if (ACPI_FAILURE (Status)) 283 { 284 goto Cleanup; 285 } 286 break; 287 288 default: 289 290 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 291 WalkState->Opcode)); 292 Status = AE_AML_BAD_OPCODE; 293 goto Cleanup; 294 } 295 296 /* Store the results to the target reference operands */ 297 298 Status = AcpiExStore (ReturnDesc2, Operand[2], WalkState); 299 if (ACPI_FAILURE (Status)) 300 { 301 goto Cleanup; 302 } 303 304 Status = AcpiExStore (ReturnDesc1, Operand[3], WalkState); 305 if (ACPI_FAILURE (Status)) 306 { 307 goto Cleanup; 308 } 309 310 Cleanup: 311 /* 312 * Since the remainder is not returned indirectly, remove a reference to 313 * it. Only the quotient is returned indirectly. 314 */ 315 AcpiUtRemoveReference (ReturnDesc2); 316 317 if (ACPI_FAILURE (Status)) 318 { 319 /* Delete the return object */ 320 321 AcpiUtRemoveReference (ReturnDesc1); 322 } 323 324 /* Save return object (the remainder) on success */ 325 326 else 327 { 328 WalkState->ResultObj = ReturnDesc1; 329 } 330 331 return_ACPI_STATUS (Status); 332 } 333 334 335 /******************************************************************************* 336 * 337 * FUNCTION: AcpiExOpcode_2A_1T_1R 338 * 339 * PARAMETERS: WalkState - Current walk state 340 * 341 * RETURN: Status 342 * 343 * DESCRIPTION: Execute opcode with two arguments, one target, and a return 344 * value. 345 * 346 ******************************************************************************/ 347 348 ACPI_STATUS 349 AcpiExOpcode_2A_1T_1R ( 350 ACPI_WALK_STATE *WalkState) 351 { 352 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 353 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 354 UINT64 Index; 355 ACPI_STATUS Status = AE_OK; 356 ACPI_SIZE Length = 0; 357 358 359 ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_1T_1R, 360 AcpiPsGetOpcodeName (WalkState->Opcode)); 361 362 363 /* Execute the opcode */ 364 365 if (WalkState->OpInfo->Flags & AML_MATH) 366 { 367 /* All simple math opcodes (add, etc.) */ 368 369 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 370 if (!ReturnDesc) 371 { 372 Status = AE_NO_MEMORY; 373 goto Cleanup; 374 } 375 376 ReturnDesc->Integer.Value = AcpiExDoMathOp (WalkState->Opcode, 377 Operand[0]->Integer.Value, 378 Operand[1]->Integer.Value); 379 goto StoreResultToTarget; 380 } 381 382 switch (WalkState->Opcode) 383 { 384 case AML_MOD_OP: /* Mod (Dividend, Divisor, RemainderResult (ACPI 2.0) */ 385 386 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 387 if (!ReturnDesc) 388 { 389 Status = AE_NO_MEMORY; 390 goto Cleanup; 391 } 392 393 /* ReturnDesc will contain the remainder */ 394 395 Status = AcpiUtDivide (Operand[0]->Integer.Value, 396 Operand[1]->Integer.Value, 397 NULL, 398 &ReturnDesc->Integer.Value); 399 break; 400 401 case AML_CONCAT_OP: /* Concatenate (Data1, Data2, Result) */ 402 403 Status = AcpiExDoConcatenate (Operand[0], Operand[1], 404 &ReturnDesc, WalkState); 405 break; 406 407 case AML_TO_STRING_OP: /* ToString (Buffer, Length, Result) (ACPI 2.0) */ 408 /* 409 * Input object is guaranteed to be a buffer at this point (it may have 410 * been converted.) Copy the raw buffer data to a new object of 411 * type String. 412 */ 413 414 /* 415 * Get the length of the new string. It is the smallest of: 416 * 1) Length of the input buffer 417 * 2) Max length as specified in the ToString operator 418 * 3) Length of input buffer up to a zero byte (null terminator) 419 * 420 * NOTE: A length of zero is ok, and will create a zero-length, null 421 * terminated string. 422 */ 423 while ((Length < Operand[0]->Buffer.Length) && 424 (Length < Operand[1]->Integer.Value) && 425 (Operand[0]->Buffer.Pointer[Length])) 426 { 427 Length++; 428 } 429 430 /* Allocate a new string object */ 431 432 ReturnDesc = AcpiUtCreateStringObject (Length); 433 if (!ReturnDesc) 434 { 435 Status = AE_NO_MEMORY; 436 goto Cleanup; 437 } 438 439 /* 440 * Copy the raw buffer data with no transform. 441 * (NULL terminated already) 442 */ 443 memcpy (ReturnDesc->String.Pointer, 444 Operand[0]->Buffer.Pointer, Length); 445 break; 446 447 case AML_CONCAT_RES_OP: 448 449 /* ConcatenateResTemplate (Buffer, Buffer, Result) (ACPI 2.0) */ 450 451 Status = AcpiExConcatTemplate (Operand[0], Operand[1], 452 &ReturnDesc, WalkState); 453 break; 454 455 case AML_INDEX_OP: /* Index (Source Index Result) */ 456 457 /* Create the internal return object */ 458 459 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); 460 if (!ReturnDesc) 461 { 462 Status = AE_NO_MEMORY; 463 goto Cleanup; 464 } 465 466 /* Initialize the Index reference object */ 467 468 Index = Operand[1]->Integer.Value; 469 ReturnDesc->Reference.Value = (UINT32) Index; 470 ReturnDesc->Reference.Class = ACPI_REFCLASS_INDEX; 471 472 /* 473 * At this point, the Source operand is a String, Buffer, or Package. 474 * Verify that the index is within range. 475 */ 476 switch ((Operand[0])->Common.Type) 477 { 478 case ACPI_TYPE_STRING: 479 480 if (Index >= Operand[0]->String.Length) 481 { 482 Length = Operand[0]->String.Length; 483 Status = AE_AML_STRING_LIMIT; 484 } 485 486 ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD; 487 ReturnDesc->Reference.IndexPointer = 488 &(Operand[0]->Buffer.Pointer [Index]); 489 break; 490 491 case ACPI_TYPE_BUFFER: 492 493 if (Index >= Operand[0]->Buffer.Length) 494 { 495 Length = Operand[0]->Buffer.Length; 496 Status = AE_AML_BUFFER_LIMIT; 497 } 498 499 ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD; 500 ReturnDesc->Reference.IndexPointer = 501 &(Operand[0]->Buffer.Pointer [Index]); 502 break; 503 504 case ACPI_TYPE_PACKAGE: 505 506 if (Index >= Operand[0]->Package.Count) 507 { 508 Length = Operand[0]->Package.Count; 509 Status = AE_AML_PACKAGE_LIMIT; 510 } 511 512 ReturnDesc->Reference.TargetType = ACPI_TYPE_PACKAGE; 513 ReturnDesc->Reference.Where = 514 &Operand[0]->Package.Elements [Index]; 515 break; 516 517 default: 518 519 Status = AE_AML_INTERNAL; 520 goto Cleanup; 521 } 522 523 /* Failure means that the Index was beyond the end of the object */ 524 525 if (ACPI_FAILURE (Status)) 526 { 527 ACPI_EXCEPTION ((AE_INFO, Status, 528 "Index (0x%X%8.8X) is beyond end of object (length 0x%X)", 529 ACPI_FORMAT_UINT64 (Index), (UINT32) Length)); 530 goto Cleanup; 531 } 532 533 /* 534 * Save the target object and add a reference to it for the life 535 * of the index 536 */ 537 ReturnDesc->Reference.Object = Operand[0]; 538 AcpiUtAddReference (Operand[0]); 539 540 /* Store the reference to the Target */ 541 542 Status = AcpiExStore (ReturnDesc, Operand[2], WalkState); 543 544 /* Return the reference */ 545 546 WalkState->ResultObj = ReturnDesc; 547 goto Cleanup; 548 549 default: 550 551 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 552 WalkState->Opcode)); 553 Status = AE_AML_BAD_OPCODE; 554 break; 555 } 556 557 558 StoreResultToTarget: 559 560 if (ACPI_SUCCESS (Status)) 561 { 562 /* 563 * Store the result of the operation (which is now in ReturnDesc) into 564 * the Target descriptor. 565 */ 566 Status = AcpiExStore (ReturnDesc, Operand[2], WalkState); 567 if (ACPI_FAILURE (Status)) 568 { 569 goto Cleanup; 570 } 571 572 if (!WalkState->ResultObj) 573 { 574 WalkState->ResultObj = ReturnDesc; 575 } 576 } 577 578 579 Cleanup: 580 581 /* Delete return object on error */ 582 583 if (ACPI_FAILURE (Status)) 584 { 585 AcpiUtRemoveReference (ReturnDesc); 586 WalkState->ResultObj = NULL; 587 } 588 589 return_ACPI_STATUS (Status); 590 } 591 592 593 /******************************************************************************* 594 * 595 * FUNCTION: AcpiExOpcode_2A_0T_1R 596 * 597 * PARAMETERS: WalkState - Current walk state 598 * 599 * RETURN: Status 600 * 601 * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value 602 * 603 ******************************************************************************/ 604 605 ACPI_STATUS 606 AcpiExOpcode_2A_0T_1R ( 607 ACPI_WALK_STATE *WalkState) 608 { 609 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 610 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 611 ACPI_STATUS Status = AE_OK; 612 BOOLEAN LogicalResult = FALSE; 613 614 615 ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_0T_1R, 616 AcpiPsGetOpcodeName (WalkState->Opcode)); 617 618 619 /* Create the internal return object */ 620 621 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 622 if (!ReturnDesc) 623 { 624 Status = AE_NO_MEMORY; 625 goto Cleanup; 626 } 627 628 /* Execute the Opcode */ 629 630 if (WalkState->OpInfo->Flags & AML_LOGICAL_NUMERIC) 631 { 632 /* LogicalOp (Operand0, Operand1) */ 633 634 Status = AcpiExDoLogicalNumericOp (WalkState->Opcode, 635 Operand[0]->Integer.Value, Operand[1]->Integer.Value, 636 &LogicalResult); 637 goto StoreLogicalResult; 638 } 639 else if (WalkState->OpInfo->Flags & AML_LOGICAL) 640 { 641 /* LogicalOp (Operand0, Operand1) */ 642 643 Status = AcpiExDoLogicalOp (WalkState->Opcode, Operand[0], 644 Operand[1], &LogicalResult); 645 goto StoreLogicalResult; 646 } 647 648 switch (WalkState->Opcode) 649 { 650 case AML_ACQUIRE_OP: /* Acquire (MutexObject, Timeout) */ 651 652 Status = AcpiExAcquireMutex (Operand[1], Operand[0], WalkState); 653 if (Status == AE_TIME) 654 { 655 LogicalResult = TRUE; /* TRUE = Acquire timed out */ 656 Status = AE_OK; 657 } 658 break; 659 660 661 case AML_WAIT_OP: /* Wait (EventObject, Timeout) */ 662 663 Status = AcpiExSystemWaitEvent (Operand[1], Operand[0]); 664 if (Status == AE_TIME) 665 { 666 LogicalResult = TRUE; /* TRUE, Wait timed out */ 667 Status = AE_OK; 668 } 669 break; 670 671 default: 672 673 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 674 WalkState->Opcode)); 675 Status = AE_AML_BAD_OPCODE; 676 goto Cleanup; 677 } 678 679 680 StoreLogicalResult: 681 /* 682 * Set return value to according to LogicalResult. logical TRUE (all ones) 683 * Default is FALSE (zero) 684 */ 685 if (LogicalResult) 686 { 687 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 688 } 689 690 Cleanup: 691 692 /* Delete return object on error */ 693 694 if (ACPI_FAILURE (Status)) 695 { 696 AcpiUtRemoveReference (ReturnDesc); 697 } 698 699 /* Save return object on success */ 700 701 else 702 { 703 WalkState->ResultObj = ReturnDesc; 704 } 705 706 return_ACPI_STATUS (Status); 707 } 708