dsutils.c revision 107325
1/******************************************************************************* 2 * 3 * Module Name: dsutils - Dispatcher utilities 4 * $Revision: 97 $ 5 * 6 ******************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 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#define __DSUTILS_C__ 118 119#include "acpi.h" 120#include "acparser.h" 121#include "amlcode.h" 122#include "acdispat.h" 123#include "acinterp.h" 124#include "acnamesp.h" 125#include "acdebug.h" 126 127#define _COMPONENT ACPI_DISPATCHER 128 ACPI_MODULE_NAME ("dsutils") 129 130#ifndef ACPI_NO_METHOD_EXECUTION 131 132/******************************************************************************* 133 * 134 * FUNCTION: AcpiDsIsResultUsed 135 * 136 * PARAMETERS: Op 137 * ResultObj 138 * WalkState 139 * 140 * RETURN: Status 141 * 142 * DESCRIPTION: Check if a result object will be used by the parent 143 * 144 ******************************************************************************/ 145 146BOOLEAN 147AcpiDsIsResultUsed ( 148 ACPI_PARSE_OBJECT *Op, 149 ACPI_WALK_STATE *WalkState) 150{ 151 const ACPI_OPCODE_INFO *ParentInfo; 152 153 154 ACPI_FUNCTION_TRACE_PTR ("DsIsResultUsed", Op); 155 156 157 /* Must have both an Op and a Result Object */ 158 159 if (!Op) 160 { 161 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n")); 162 return_VALUE (TRUE); 163 } 164 165 /* 166 * If there is no parent, the result can't possibly be used! 167 * (An executing method typically has no parent, since each 168 * method is parsed separately) However, a method that is 169 * invoked from another method has a parent. 170 */ 171 if (!Op->Common.Parent) 172 { 173 return_VALUE (FALSE); 174 } 175 176 /* 177 * Get info on the parent. The root Op is AML_SCOPE 178 */ 179 ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode); 180 if (ParentInfo->Class == AML_CLASS_UNKNOWN) 181 { 182 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown parent opcode. Op=%p\n", Op)); 183 return_VALUE (FALSE); 184 } 185 186 /* 187 * Decide what to do with the result based on the parent. If 188 * the parent opcode will not use the result, delete the object. 189 * Otherwise leave it as is, it will be deleted when it is used 190 * as an operand later. 191 */ 192 switch (ParentInfo->Class) 193 { 194 case AML_CLASS_CONTROL: 195 196 switch (Op->Common.Parent->Common.AmlOpcode) 197 { 198 case AML_RETURN_OP: 199 200 /* Never delete the return value associated with a return opcode */ 201 202 goto ResultUsed; 203 204 case AML_IF_OP: 205 case AML_WHILE_OP: 206 207 /* 208 * If we are executing the predicate AND this is the predicate op, 209 * we will use the return value 210 */ 211 if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) && 212 (WalkState->ControlState->Control.PredicateOp == Op)) 213 { 214 goto ResultUsed; 215 } 216 break; 217 218 default: 219 /* Ignore other control opcodes */ 220 break; 221 } 222 223 /* The general control opcode returns no result */ 224 225 goto ResultNotUsed; 226 227 228 case AML_CLASS_CREATE: 229 230 /* 231 * These opcodes allow TermArg(s) as operands and therefore 232 * the operands can be method calls. The result is used. 233 */ 234 goto ResultUsed; 235 236 237 case AML_CLASS_NAMED_OBJECT: 238 239 if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) || 240 (Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) || 241 (Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || 242 (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) || 243 (Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) || 244 (Op->Common.Parent->Common.AmlOpcode == AML_INT_EVAL_SUBTREE_OP)) 245 { 246 /* 247 * These opcodes allow TermArg(s) as operands and therefore 248 * the operands can be method calls. The result is used. 249 */ 250 goto ResultUsed; 251 } 252 253 goto ResultNotUsed; 254 255 256 default: 257 258 /* 259 * In all other cases. the parent will actually use the return 260 * object, so keep it. 261 */ 262 goto ResultUsed; 263 } 264 265 266ResultUsed: 267 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] used by Parent [%s] Op=%p\n", 268 AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 269 AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op)); 270 271 return_VALUE (TRUE); 272 273 274ResultNotUsed: 275 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] not used by Parent [%s] Op=%p\n", 276 AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 277 AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op)); 278 279 return_VALUE (FALSE); 280 281} 282 283 284/******************************************************************************* 285 * 286 * FUNCTION: AcpiDsDeleteResultIfNotUsed 287 * 288 * PARAMETERS: Op 289 * ResultObj 290 * WalkState 291 * 292 * RETURN: Status 293 * 294 * DESCRIPTION: Used after interpretation of an opcode. If there is an internal 295 * result descriptor, check if the parent opcode will actually use 296 * this result. If not, delete the result now so that it will 297 * not become orphaned. 298 * 299 ******************************************************************************/ 300 301void 302AcpiDsDeleteResultIfNotUsed ( 303 ACPI_PARSE_OBJECT *Op, 304 ACPI_OPERAND_OBJECT *ResultObj, 305 ACPI_WALK_STATE *WalkState) 306{ 307 ACPI_OPERAND_OBJECT *ObjDesc; 308 ACPI_STATUS Status; 309 310 311 ACPI_FUNCTION_TRACE_PTR ("DsDeleteResultIfNotUsed", ResultObj); 312 313 314 if (!Op) 315 { 316 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n")); 317 return_VOID; 318 } 319 320 if (!ResultObj) 321 { 322 return_VOID; 323 } 324 325 326 if (!AcpiDsIsResultUsed (Op, WalkState)) 327 { 328 /* 329 * Must pop the result stack (ObjDesc should be equal to ResultObj) 330 */ 331 Status = AcpiDsResultPop (&ObjDesc, WalkState); 332 if (ACPI_SUCCESS (Status)) 333 { 334 AcpiUtRemoveReference (ResultObj); 335 } 336 } 337 338 return_VOID; 339} 340 341 342/******************************************************************************* 343 * 344 * FUNCTION: AcpiDsResolveOperands 345 * 346 * PARAMETERS: WalkState - Current walk state with operands on stack 347 * 348 * RETURN: Status 349 * 350 * DESCRIPTION: Resolve all operands to their values. Used to prepare 351 * arguments to a control method invocation (a call from one 352 * method to another.) 353 * 354 ******************************************************************************/ 355 356ACPI_STATUS 357AcpiDsResolveOperands ( 358 ACPI_WALK_STATE *WalkState) 359{ 360 UINT32 i; 361 ACPI_STATUS Status = AE_OK; 362 363 364 ACPI_FUNCTION_TRACE_PTR ("DsResolveOperands", WalkState); 365 366 367 /* 368 * Attempt to resolve each of the valid operands 369 * Method arguments are passed by value, not by reference 370 */ 371 for (i = 0; i < WalkState->NumOperands; i++) 372 { 373 Status = AcpiExResolveToValue (&WalkState->Operands[i], WalkState); 374 if (ACPI_FAILURE (Status)) 375 { 376 break; 377 } 378 } 379 380 return_ACPI_STATUS (Status); 381} 382 383 384/******************************************************************************* 385 * 386 * FUNCTION: AcpiDsClearOperands 387 * 388 * PARAMETERS: WalkState - Current walk state with operands on stack 389 * 390 * RETURN: None 391 * 392 * DESCRIPTION: Clear all operands on the current walk state operand stack. 393 * 394 ******************************************************************************/ 395 396void 397AcpiDsClearOperands ( 398 ACPI_WALK_STATE *WalkState) 399{ 400 UINT32 i; 401 402 403 ACPI_FUNCTION_TRACE_PTR ("AcpiDsClearOperands", WalkState); 404 405 406 /* 407 * Remove a reference on each operand on the stack 408 */ 409 for (i = 0; i < WalkState->NumOperands; i++) 410 { 411 /* 412 * Remove a reference to all operands, including both 413 * "Arguments" and "Targets". 414 */ 415 AcpiUtRemoveReference (WalkState->Operands[i]); 416 WalkState->Operands[i] = NULL; 417 } 418 419 WalkState->NumOperands = 0; 420 return_VOID; 421} 422#endif 423 424 425/******************************************************************************* 426 * 427 * FUNCTION: AcpiDsCreateOperand 428 * 429 * PARAMETERS: WalkState 430 * Arg 431 * 432 * RETURN: Status 433 * 434 * DESCRIPTION: Translate a parse tree object that is an argument to an AML 435 * opcode to the equivalent interpreter object. This may include 436 * looking up a name or entering a new name into the internal 437 * namespace. 438 * 439 ******************************************************************************/ 440 441ACPI_STATUS 442AcpiDsCreateOperand ( 443 ACPI_WALK_STATE *WalkState, 444 ACPI_PARSE_OBJECT *Arg, 445 UINT32 ArgIndex) 446{ 447 ACPI_STATUS Status = AE_OK; 448 NATIVE_CHAR *NameString; 449 UINT32 NameLength; 450 ACPI_OPERAND_OBJECT *ObjDesc; 451 ACPI_PARSE_OBJECT *ParentOp; 452 UINT16 Opcode; 453 ACPI_INTERPRETER_MODE InterpreterMode; 454 const ACPI_OPCODE_INFO *OpInfo; 455 456 457 ACPI_FUNCTION_TRACE_PTR ("DsCreateOperand", Arg); 458 459 460 /* A valid name must be looked up in the namespace */ 461 462 if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) && 463 (Arg->Common.Value.String)) 464 { 465 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", Arg)); 466 467 /* Get the entire name string from the AML stream */ 468 469 Status = AcpiExGetNameString (ACPI_TYPE_ANY, Arg->Common.Value.Buffer, 470 &NameString, &NameLength); 471 472 if (ACPI_FAILURE (Status)) 473 { 474 return_ACPI_STATUS (Status); 475 } 476 477 /* 478 * All prefixes have been handled, and the name is 479 * in NameString 480 */ 481 482 /* 483 * Differentiate between a namespace "create" operation 484 * versus a "lookup" operation (IMODE_LOAD_PASS2 vs. 485 * IMODE_EXECUTE) in order to support the creation of 486 * namespace objects during the execution of control methods. 487 */ 488 ParentOp = Arg->Common.Parent; 489 OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode); 490 if ((OpInfo->Flags & AML_NSNODE) && 491 (ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) && 492 (ParentOp->Common.AmlOpcode != AML_REGION_OP) && 493 (ParentOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP)) 494 { 495 /* Enter name into namespace if not found */ 496 497 InterpreterMode = ACPI_IMODE_LOAD_PASS2; 498 } 499 500 else 501 { 502 /* Return a failure if name not found */ 503 504 InterpreterMode = ACPI_IMODE_EXECUTE; 505 } 506 507 Status = AcpiNsLookup (WalkState->ScopeInfo, NameString, 508 ACPI_TYPE_ANY, InterpreterMode, 509 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, 510 WalkState, 511 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc)); 512 /* 513 * The only case where we pass through (ignore) a NOT_FOUND 514 * error is for the CondRefOf opcode. 515 */ 516 if (Status == AE_NOT_FOUND) 517 { 518 if (ParentOp->Common.AmlOpcode == AML_COND_REF_OF_OP) 519 { 520 /* 521 * For the Conditional Reference op, it's OK if 522 * the name is not found; We just need a way to 523 * indicate this to the interpreter, set the 524 * object to the root 525 */ 526 ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, AcpiGbl_RootNode); 527 Status = AE_OK; 528 } 529 530 else 531 { 532 /* 533 * We just plain didn't find it -- which is a 534 * very serious error at this point 535 */ 536 Status = AE_AML_NAME_NOT_FOUND; 537 } 538 } 539 540 if (ACPI_FAILURE (Status)) 541 { 542 ACPI_REPORT_NSERROR (NameString, Status); 543 } 544 545 /* Free the namestring created above */ 546 547 ACPI_MEM_FREE (NameString); 548 549 /* Check status from the lookup */ 550 551 if (ACPI_FAILURE (Status)) 552 { 553 return_ACPI_STATUS (Status); 554 } 555 556 /* Put the resulting object onto the current object stack */ 557 558 Status = AcpiDsObjStackPush (ObjDesc, WalkState); 559 if (ACPI_FAILURE (Status)) 560 { 561 return_ACPI_STATUS (Status); 562 } 563 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState)); 564 } 565 566 567 else 568 { 569 /* Check for null name case */ 570 571 if (Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) 572 { 573 /* 574 * If the name is null, this means that this is an 575 * optional result parameter that was not specified 576 * in the original ASL. Create a Zero Constant for a 577 * placeholder. (Store to a constant is a Noop.) 578 */ 579 Opcode = AML_ZERO_OP; /* Has no arguments! */ 580 581 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Null namepath: Arg=%p\n", Arg)); 582 } 583 584 else 585 { 586 Opcode = Arg->Common.AmlOpcode; 587 } 588 589 /* Get the object type of the argument */ 590 591 OpInfo = AcpiPsGetOpcodeInfo (Opcode); 592 if (OpInfo->ObjectType == ACPI_TYPE_INVALID) 593 { 594 return_ACPI_STATUS (AE_NOT_IMPLEMENTED); 595 } 596 597 if (OpInfo->Flags & AML_HAS_RETVAL) 598 { 599 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 600 "Argument previously created, already stacked \n")); 601 602 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject ( 603 WalkState->Operands [WalkState->NumOperands - 1], WalkState)); 604 605 /* 606 * Use value that was already previously returned 607 * by the evaluation of this argument 608 */ 609 Status = AcpiDsResultPopFromBottom (&ObjDesc, WalkState); 610 if (ACPI_FAILURE (Status)) 611 { 612 /* 613 * Only error is underflow, and this indicates 614 * a missing or null operand! 615 */ 616 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Missing or null operand, %s\n", 617 AcpiFormatException (Status))); 618 return_ACPI_STATUS (Status); 619 } 620 } 621 else 622 { 623 /* Create an ACPI_INTERNAL_OBJECT for the argument */ 624 625 ObjDesc = AcpiUtCreateInternalObject (OpInfo->ObjectType); 626 if (!ObjDesc) 627 { 628 return_ACPI_STATUS (AE_NO_MEMORY); 629 } 630 631 /* Initialize the new object */ 632 633 Status = AcpiDsInitObjectFromOp (WalkState, Arg, 634 Opcode, &ObjDesc); 635 if (ACPI_FAILURE (Status)) 636 { 637 AcpiUtDeleteObjectDesc (ObjDesc); 638 return_ACPI_STATUS (Status); 639 } 640 } 641 642 /* Put the operand object on the object stack */ 643 644 Status = AcpiDsObjStackPush (ObjDesc, WalkState); 645 if (ACPI_FAILURE (Status)) 646 { 647 return_ACPI_STATUS (Status); 648 } 649 650 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState)); 651 } 652 653 return_ACPI_STATUS (AE_OK); 654} 655 656 657/******************************************************************************* 658 * 659 * FUNCTION: AcpiDsCreateOperands 660 * 661 * PARAMETERS: FirstArg - First argument of a parser argument tree 662 * 663 * RETURN: Status 664 * 665 * DESCRIPTION: Convert an operator's arguments from a parse tree format to 666 * namespace objects and place those argument object on the object 667 * stack in preparation for evaluation by the interpreter. 668 * 669 ******************************************************************************/ 670 671ACPI_STATUS 672AcpiDsCreateOperands ( 673 ACPI_WALK_STATE *WalkState, 674 ACPI_PARSE_OBJECT *FirstArg) 675{ 676 ACPI_STATUS Status = AE_OK; 677 ACPI_PARSE_OBJECT *Arg; 678 UINT32 ArgCount = 0; 679 680 681 ACPI_FUNCTION_TRACE_PTR ("DsCreateOperands", FirstArg); 682 683 684 /* For all arguments in the list... */ 685 686 Arg = FirstArg; 687 while (Arg) 688 { 689 Status = AcpiDsCreateOperand (WalkState, Arg, ArgCount); 690 if (ACPI_FAILURE (Status)) 691 { 692 goto Cleanup; 693 } 694 695 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%d (%p) done, Arg1=%p\n", 696 ArgCount, Arg, FirstArg)); 697 698 /* Move on to next argument, if any */ 699 700 Arg = Arg->Common.Next; 701 ArgCount++; 702 } 703 704 return_ACPI_STATUS (Status); 705 706 707Cleanup: 708 /* 709 * We must undo everything done above; meaning that we must 710 * pop everything off of the operand stack and delete those 711 * objects 712 */ 713 (void) AcpiDsObjStackPopAndDelete (ArgCount, WalkState); 714 715 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "While creating Arg %d - %s\n", 716 (ArgCount + 1), AcpiFormatException (Status))); 717 return_ACPI_STATUS (Status); 718} 719 720 721