1 /******************************************************************************
2 *
3 * Module Name: dswexec - Dispatcher method execution callbacks;
4 * dispatch to interpreter.
5 *
6 *****************************************************************************/
7
8 /*
9 * Copyright (C) 2000 - 2014, Intel Corp.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45 #define __DSWEXEC_C__
46
47 #include "acpi.h"
48 #include "accommon.h"
49 #include "acparser.h"
50 #include "amlcode.h"
51 #include "acdispat.h"
52 #include "acinterp.h"
53 #include "acnamesp.h"
54 #include "acdebug.h"
55
56
57 #define _COMPONENT ACPI_DISPATCHER
58 ACPI_MODULE_NAME ("dswexec")
59
60 /*
61 * Dispatch table for opcode classes
62 */
63 static ACPI_EXECUTE_OP AcpiGbl_OpTypeDispatch [] =
64 {
65 AcpiExOpcode_0A_0T_1R,
66 AcpiExOpcode_1A_0T_0R,
67 AcpiExOpcode_1A_0T_1R,
68 AcpiExOpcode_1A_1T_0R,
69 AcpiExOpcode_1A_1T_1R,
70 AcpiExOpcode_2A_0T_0R,
71 AcpiExOpcode_2A_0T_1R,
72 AcpiExOpcode_2A_1T_1R,
73 AcpiExOpcode_2A_2T_1R,
74 AcpiExOpcode_3A_0T_0R,
75 AcpiExOpcode_3A_1T_1R,
76 AcpiExOpcode_6A_0T_1R
77 };
78
79
80 /*****************************************************************************
81 *
82 * FUNCTION: AcpiDsGetPredicateValue
83 *
84 * PARAMETERS: WalkState - Current state of the parse tree walk
85 * ResultObj - if non-zero, pop result from result stack
86 *
87 * RETURN: Status
88 *
89 * DESCRIPTION: Get the result of a predicate evaluation
90 *
91 ****************************************************************************/
92
93 ACPI_STATUS
94 AcpiDsGetPredicateValue (
95 ACPI_WALK_STATE *WalkState,
96 ACPI_OPERAND_OBJECT *ResultObj)
97 {
98 ACPI_STATUS Status = AE_OK;
99 ACPI_OPERAND_OBJECT *ObjDesc;
100 ACPI_OPERAND_OBJECT *LocalObjDesc = NULL;
101
102
103 ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
104
105
106 WalkState->ControlState->Common.State = 0;
107
108 if (ResultObj)
109 {
110 Status = AcpiDsResultPop (&ObjDesc, WalkState);
111 if (ACPI_FAILURE (Status))
112 {
113 ACPI_EXCEPTION ((AE_INFO, Status,
114 "Could not get result from predicate evaluation"));
115
116 return_ACPI_STATUS (Status);
117 }
118 }
119 else
120 {
121 Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
122 if (ACPI_FAILURE (Status))
123 {
124 return_ACPI_STATUS (Status);
125 }
126
127 Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
128 if (ACPI_FAILURE (Status))
129 {
130 return_ACPI_STATUS (Status);
131 }
132
133 ObjDesc = WalkState->Operands [0];
134 }
135
136 if (!ObjDesc)
137 {
138 ACPI_ERROR ((AE_INFO,
139 "No predicate ObjDesc=%p State=%p",
140 ObjDesc, WalkState));
141
142 return_ACPI_STATUS (AE_AML_NO_OPERAND);
143 }
144
145 /*
146 * Result of predicate evaluation must be an Integer
147 * object. Implicitly convert the argument if necessary.
148 */
149 Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
150 if (ACPI_FAILURE (Status))
151 {
152 goto Cleanup;
153 }
154
155 if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
156 {
157 ACPI_ERROR ((AE_INFO,
158 "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
159 ObjDesc, WalkState, ObjDesc->Common.Type));
160
161 Status = AE_AML_OPERAND_TYPE;
162 goto Cleanup;
163 }
164
165 /* Truncate the predicate to 32-bits if necessary */
166
167 (void) AcpiExTruncateFor32bitTable (LocalObjDesc);
168
169 /*
170 * Save the result of the predicate evaluation on
171 * the control stack
172 */
173 if (LocalObjDesc->Integer.Value)
174 {
175 WalkState->ControlState->Common.Value = TRUE;
176 }
177 else
178 {
179 /*
180 * Predicate is FALSE, we will just toss the
181 * rest of the package
182 */
183 WalkState->ControlState->Common.Value = FALSE;
184 Status = AE_CTRL_FALSE;
185 }
186
187 /* Predicate can be used for an implicit return value */
188
189 (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
190
191
192 Cleanup:
193
194 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
195 WalkState->ControlState->Common.Value, WalkState->Op));
196
197 /* Break to debugger to display result */
198
199 ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (LocalObjDesc, WalkState));
200
201 /*
202 * Delete the predicate result object (we know that
203 * we don't need it anymore)
204 */
205 if (LocalObjDesc != ObjDesc)
206 {
207 AcpiUtRemoveReference (LocalObjDesc);
208 }
209 AcpiUtRemoveReference (ObjDesc);
210
211 WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
212 return_ACPI_STATUS (Status);
213 }
214
215
216 /*****************************************************************************
217 *
218 * FUNCTION: AcpiDsExecBeginOp
219 *
220 * PARAMETERS: WalkState - Current state of the parse tree walk
221 * OutOp - Where to return op if a new one is created
222 *
223 * RETURN: Status
224 *
225 * DESCRIPTION: Descending callback used during the execution of control
226 * methods. This is where most operators and operands are
227 * dispatched to the interpreter.
228 *
229 ****************************************************************************/
230
231 ACPI_STATUS
232 AcpiDsExecBeginOp (
233 ACPI_WALK_STATE *WalkState,
234 ACPI_PARSE_OBJECT **OutOp)
235 {
236 ACPI_PARSE_OBJECT *Op;
237 ACPI_STATUS Status = AE_OK;
238 UINT32 OpcodeClass;
239
240
241 ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
242
243
244 Op = WalkState->Op;
245 if (!Op)
246 {
247 Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
248 if (ACPI_FAILURE (Status))
249 {
250 goto ErrorExit;
251 }
252
253 Op = *OutOp;
254 WalkState->Op = Op;
255 WalkState->Opcode = Op->Common.AmlOpcode;
256 WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
257
258 if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
259 {
260 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
261 "(%s) Popping scope for Op %p\n",
262 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
263
264 Status = AcpiDsScopeStackPop (WalkState);
265 if (ACPI_FAILURE (Status))
266 {
267 goto ErrorExit;
268 }
269 }
270 }
271
272 if (Op == WalkState->Origin)
273 {
274 if (OutOp)
275 {
276 *OutOp = Op;
277 }
278
279 return_ACPI_STATUS (AE_OK);
280 }
281
282 /*
283 * If the previous opcode was a conditional, this opcode
284 * must be the beginning of the associated predicate.
285 * Save this knowledge in the current scope descriptor
286 */
287 if ((WalkState->ControlState) &&
288 (WalkState->ControlState->Common.State ==
289 ACPI_CONTROL_CONDITIONAL_EXECUTING))
290 {
291 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n",
292 Op, WalkState));
293
294 WalkState->ControlState->Common.State = ACPI_CONTROL_PREDICATE_EXECUTING;
295
296 /* Save start of predicate */
297
298 WalkState->ControlState->Control.PredicateOp = Op;
299 }
300
301
302 OpcodeClass = WalkState->OpInfo->Class;
303
304 /* We want to send namepaths to the load code */
305
306 if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
307 {
308 OpcodeClass = AML_CLASS_NAMED_OBJECT;
309 }
310
311 /*
312 * Handle the opcode based upon the opcode type
313 */
314 switch (OpcodeClass)
315 {
316 case AML_CLASS_CONTROL:
317
318 Status = AcpiDsExecBeginControlOp (WalkState, Op);
319 break;
320
321 case AML_CLASS_NAMED_OBJECT:
322
323 if (WalkState->WalkType & ACPI_WALK_METHOD)
324 {
325 /*
326 * Found a named object declaration during method execution;
327 * we must enter this object into the namespace. The created
328 * object is temporary and will be deleted upon completion of
329 * the execution of this method.
330 *
331 * Note 10/2010: Except for the Scope() op. This opcode does
332 * not actually create a new object, it refers to an existing
333 * object. However, for Scope(), we want to indeed open a
334 * new scope.
335 */
336 if (Op->Common.AmlOpcode != AML_SCOPE_OP)
337 {
338 Status = AcpiDsLoad2BeginOp (WalkState, NULL);
339 }
340 else
341 {
342 Status = AcpiDsScopeStackPush (Op->Named.Node,
343 Op->Named.Node->Type, WalkState);
344 if (ACPI_FAILURE (Status))
345 {
346 return_ACPI_STATUS (Status);
347 }
348 }
349 }
350 break;
351
352 case AML_CLASS_EXECUTE:
353 case AML_CLASS_CREATE:
354
355 break;
356
357 default:
358
359 break;
360 }
361
362 /* Nothing to do here during method execution */
363
364 return_ACPI_STATUS (Status);
365
366
367 ErrorExit:
368 Status = AcpiDsMethodError (Status, WalkState);
369 return_ACPI_STATUS (Status);
370 }
371
372
373 /*****************************************************************************
374 *
375 * FUNCTION: AcpiDsExecEndOp
376 *
377 * PARAMETERS: WalkState - Current state of the parse tree walk
378 *
379 * RETURN: Status
380 *
381 * DESCRIPTION: Ascending callback used during the execution of control
382 * methods. The only thing we really need to do here is to
383 * notice the beginning of IF, ELSE, and WHILE blocks.
384 *
385 ****************************************************************************/
386
387 ACPI_STATUS
388 AcpiDsExecEndOp (
389 ACPI_WALK_STATE *WalkState)
390 {
391 ACPI_PARSE_OBJECT *Op;
392 ACPI_STATUS Status = AE_OK;
393 UINT32 OpType;
394 UINT32 OpClass;
395 ACPI_PARSE_OBJECT *NextOp;
396 ACPI_PARSE_OBJECT *FirstArg;
397
398
399 ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
400
401
402 Op = WalkState->Op;
403 OpType = WalkState->OpInfo->Type;
404 OpClass = WalkState->OpInfo->Class;
405
406 if (OpClass == AML_CLASS_UNKNOWN)
407 {
408 ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));
409 return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
410 }
411
412 FirstArg = Op->Common.Value.Arg;
413
414 /* Init the walk state */
415
416 WalkState->NumOperands = 0;
417 WalkState->OperandIndex = 0;
418 WalkState->ReturnDesc = NULL;
419 WalkState->ResultObj = NULL;
420
421 /* Call debugger for single step support (DEBUG build only) */
422
423 ACPI_DEBUGGER_EXEC (Status = AcpiDbSingleStep (WalkState, Op, OpClass));
424 ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (Status)) {return_ACPI_STATUS (Status);});
425
426 /* Decode the Opcode Class */
427
428 switch (OpClass)
429 {
430 case AML_CLASS_ARGUMENT: /* Constants, literals, etc. */
431
432 if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
433 {
434 Status = AcpiDsEvaluateNamePath (WalkState);
435 if (ACPI_FAILURE (Status))
436 {
437 goto Cleanup;
438 }
439 }
440 break;
441
442 case AML_CLASS_EXECUTE: /* Most operators with arguments */
443
444 /* Build resolved operand stack */
445
446 Status = AcpiDsCreateOperands (WalkState, FirstArg);
447 if (ACPI_FAILURE (Status))
448 {
449 goto Cleanup;
450 }
451
452 /*
453 * All opcodes require operand resolution, with the only exceptions
454 * being the ObjectType and SizeOf operators.
455 */
456 if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
457 {
458 /* Resolve all operands */
459
460 Status = AcpiExResolveOperands (WalkState->Opcode,
461 &(WalkState->Operands [WalkState->NumOperands -1]),
462 WalkState);
463 }
464
465 if (ACPI_SUCCESS (Status))
466 {
467 /*
468 * Dispatch the request to the appropriate interpreter handler
469 * routine. There is one routine per opcode "type" based upon the
470 * number of opcode arguments and return type.
471 */
472 Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
473 }
474 else
475 {
476 /*
477 * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
478 * Local is uninitialized.
479 */
480 if ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
481 (WalkState->Opcode == AML_STORE_OP) &&
482 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
483 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
484 (WalkState->Operands[0]->Reference.Class ==
485 WalkState->Operands[1]->Reference.Class) &&
486 (WalkState->Operands[0]->Reference.Value ==
487 WalkState->Operands[1]->Reference.Value))
488 {
489 Status = AE_OK;
490 }
491 else
492 {
493 ACPI_EXCEPTION ((AE_INFO, Status,
494 "While resolving operands for [%s]",
495 AcpiPsGetOpcodeName (WalkState->Opcode)));
496 }
497 }
498
499 /* Always delete the argument objects and clear the operand stack */
500
501 AcpiDsClearOperands (WalkState);
502
503 /*
504 * If a result object was returned from above, push it on the
505 * current result stack
506 */
507 if (ACPI_SUCCESS (Status) &&
508 WalkState->ResultObj)
509 {
510 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
511 }
512 break;
513
514 default:
515
516 switch (OpType)
517 {
518 case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
519
520 /* 1 Operand, 0 ExternalResult, 0 InternalResult */
521
522 Status = AcpiDsExecEndControlOp (WalkState, Op);
523
524 break;
525
526 case AML_TYPE_METHOD_CALL:
527 /*
528 * If the method is referenced from within a package
529 * declaration, it is not a invocation of the method, just
530 * a reference to it.
531 */
532 if ((Op->Asl.Parent) &&
533 ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
534 (Op->Asl.Parent->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)))
535 {
536 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
537 "Method Reference in a Package, Op=%p\n", Op));
538
539 Op->Common.Node = (ACPI_NAMESPACE_NODE *) Op->Asl.Value.Arg->Asl.Node;
540 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
541 return_ACPI_STATUS (AE_OK);
542 }
543
544 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
545 "Method invocation, Op=%p\n", Op));
546
547 /*
548 * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
549 * the method Node pointer
550 */
551 /* NextOp points to the op that holds the method name */
552
553 NextOp = FirstArg;
554
555 /* NextOp points to first argument op */
556
557 NextOp = NextOp->Common.Next;
558
559 /*
560 * Get the method's arguments and put them on the operand stack
561 */
562 Status = AcpiDsCreateOperands (WalkState, NextOp);
563 if (ACPI_FAILURE (Status))
564 {
565 break;
566 }
567
568 /*
569 * Since the operands will be passed to another control method,
570 * we must resolve all local references here (Local variables,
571 * arguments to *this* method, etc.)
572 */
573 Status = AcpiDsResolveOperands (WalkState);
574 if (ACPI_FAILURE (Status))
575 {
576 /* On error, clear all resolved operands */
577
578 AcpiDsClearOperands (WalkState);
579 break;
580 }
581
582 /*
583 * Tell the walk loop to preempt this running method and
584 * execute the new method
585 */
586 Status = AE_CTRL_TRANSFER;
587
588 /*
589 * Return now; we don't want to disturb anything,
590 * especially the operand count!
591 */
592 return_ACPI_STATUS (Status);
593
594 case AML_TYPE_CREATE_FIELD:
595
596 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
597 "Executing CreateField Buffer/Index Op=%p\n", Op));
598
599 Status = AcpiDsLoad2EndOp (WalkState);
600 if (ACPI_FAILURE (Status))
601 {
602 break;
603 }
604
605 Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
606 break;
607
608
609 case AML_TYPE_CREATE_OBJECT:
610
611 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
612 "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
613
614 switch (Op->Common.Parent->Common.AmlOpcode)
615 {
616 case AML_NAME_OP:
617 /*
618 * Put the Node on the object stack (Contains the ACPI Name
619 * of this object)
620 */
621 WalkState->Operands[0] = (void *) Op->Common.Parent->Common.Node;
622 WalkState->NumOperands = 1;
623
624 Status = AcpiDsCreateNode (WalkState,
625 Op->Common.Parent->Common.Node,
626 Op->Common.Parent);
627 if (ACPI_FAILURE (Status))
628 {
629 break;
630 }
631
632 /* Fall through */
633 /*lint -fallthrough */
634
635 case AML_INT_EVAL_SUBTREE_OP:
636
637 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
638 AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
639 break;
640
641 default:
642
643 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
644 break;
645 }
646
647 /*
648 * If a result object was returned from above, push it on the
649 * current result stack
650 */
651 if (WalkState->ResultObj)
652 {
653 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
654 }
655 break;
656
657 case AML_TYPE_NAMED_FIELD:
658 case AML_TYPE_NAMED_COMPLEX:
659 case AML_TYPE_NAMED_SIMPLE:
660 case AML_TYPE_NAMED_NO_OBJ:
661
662 Status = AcpiDsLoad2EndOp (WalkState);
663 if (ACPI_FAILURE (Status))
664 {
665 break;
666 }
667
668 if (Op->Common.AmlOpcode == AML_REGION_OP)
669 {
670 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
671 "Executing OpRegion Address/Length Op=%p\n", Op));
672
673 Status = AcpiDsEvalRegionOperands (WalkState, Op);
674 if (ACPI_FAILURE (Status))
675 {
676 break;
677 }
678 }
679 else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
680 {
681 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
682 "Executing DataTableRegion Strings Op=%p\n", Op));
683
684 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
685 if (ACPI_FAILURE (Status))
686 {
687 break;
688 }
689 }
690 else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
691 {
692 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
693 "Executing BankField Op=%p\n", Op));
694
695 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
696 if (ACPI_FAILURE (Status))
697 {
698 break;
699 }
700 }
701 break;
702
703 case AML_TYPE_UNDEFINED:
704
705 ACPI_ERROR ((AE_INFO,
706 "Undefined opcode type Op=%p", Op));
707 return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
708
709 case AML_TYPE_BOGUS:
710
711 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
712 "Internal opcode=%X type Op=%p\n",
713 WalkState->Opcode, Op));
714 break;
715
716 default:
717
718 ACPI_ERROR ((AE_INFO,
719 "Unimplemented opcode, class=0x%X type=0x%X Opcode=0x%X Op=%p",
720 OpClass, OpType, Op->Common.AmlOpcode, Op));
721
722 Status = AE_NOT_IMPLEMENTED;
723 break;
724 }
725 }
726
727 /*
728 * ACPI 2.0 support for 64-bit integers: Truncate numeric
729 * result value if we are executing from a 32-bit ACPI table
730 */
731 (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
732
733 /*
734 * Check if we just completed the evaluation of a
735 * conditional predicate
736 */
737 if ((ACPI_SUCCESS (Status)) &&
738 (WalkState->ControlState) &&
739 (WalkState->ControlState->Common.State ==
740 ACPI_CONTROL_PREDICATE_EXECUTING) &&
741 (WalkState->ControlState->Control.PredicateOp == Op))
742 {
743 Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
744 WalkState->ResultObj = NULL;
745 }
746
747
748 Cleanup:
749
750 if (WalkState->ResultObj)
751 {
752 /* Break to debugger to display result */
753
754 ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (WalkState->ResultObj,
755 WalkState));
756
757 /*
758 * Delete the result op if and only if:
759 * Parent will not use the result -- such as any
760 * non-nested type2 op in a method (parent will be method)
761 */
762 AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
763 }
764
765 #ifdef _UNDER_DEVELOPMENT
766
767 if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
768 {
769 AcpiDbMethodEnd (WalkState);
770 }
771 #endif
772
773 /* Invoke exception handler on error */
774
775 if (ACPI_FAILURE (Status))
776 {
777 Status = AcpiDsMethodError (Status, WalkState);
778 }
779
780 /* Always clear the object stack */
781
782 WalkState->NumOperands = 0;
783 return_ACPI_STATUS (Status);
784 }