1/******************************************************************************
2 *
3 * Module Name: dswexec - Dispatcher method execution callbacks;
4 *                        dispatch to interpreter.
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2013, 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 <contrib/dev/acpica/include/acpi.h>
48#include <contrib/dev/acpica/include/accommon.h>
49#include <contrib/dev/acpica/include/acparser.h>
50#include <contrib/dev/acpica/include/amlcode.h>
51#include <contrib/dev/acpica/include/acdispat.h>
52#include <contrib/dev/acpica/include/acinterp.h>
53#include <contrib/dev/acpica/include/acnamesp.h>
54#include <contrib/dev/acpica/include/acdebug.h>
55
56
57#define _COMPONENT          ACPI_DISPATCHER
58        ACPI_MODULE_NAME    ("dswexec")
59
60/*
61 * Dispatch table for opcode classes
62 */
63static 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
93ACPI_STATUS
94AcpiDsGetPredicateValue (
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
192Cleanup:
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
231ACPI_STATUS
232AcpiDsExecBeginOp (
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
367ErrorExit:
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
387ACPI_STATUS
388AcpiDsExecEndOp (
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, "Method invocation, Op=%p\n", Op));
545
546            /*
547             * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
548             * the method Node pointer
549             */
550            /* NextOp points to the op that holds the method name */
551
552            NextOp = FirstArg;
553
554            /* NextOp points to first argument op */
555
556            NextOp = NextOp->Common.Next;
557
558            /*
559             * Get the method's arguments and put them on the operand stack
560             */
561            Status = AcpiDsCreateOperands (WalkState, NextOp);
562            if (ACPI_FAILURE (Status))
563            {
564                break;
565            }
566
567            /*
568             * Since the operands will be passed to another control method,
569             * we must resolve all local references here (Local variables,
570             * arguments to *this* method, etc.)
571             */
572            Status = AcpiDsResolveOperands (WalkState);
573            if (ACPI_FAILURE (Status))
574            {
575                /* On error, clear all resolved operands */
576
577                AcpiDsClearOperands (WalkState);
578                break;
579            }
580
581            /*
582             * Tell the walk loop to preempt this running method and
583             * execute the new method
584             */
585            Status = AE_CTRL_TRANSFER;
586
587            /*
588             * Return now; we don't want to disturb anything,
589             * especially the operand count!
590             */
591            return_ACPI_STATUS (Status);
592
593        case AML_TYPE_CREATE_FIELD:
594
595            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
596                "Executing CreateField Buffer/Index Op=%p\n", Op));
597
598            Status = AcpiDsLoad2EndOp (WalkState);
599            if (ACPI_FAILURE (Status))
600            {
601                break;
602            }
603
604            Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
605            break;
606
607
608        case AML_TYPE_CREATE_OBJECT:
609
610            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
611                "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
612
613            switch (Op->Common.Parent->Common.AmlOpcode)
614            {
615            case AML_NAME_OP:
616                /*
617                 * Put the Node on the object stack (Contains the ACPI Name
618                 * of this object)
619                 */
620                WalkState->Operands[0] = (void *) Op->Common.Parent->Common.Node;
621                WalkState->NumOperands = 1;
622
623                Status = AcpiDsCreateNode (WalkState,
624                            Op->Common.Parent->Common.Node,
625                            Op->Common.Parent);
626                if (ACPI_FAILURE (Status))
627                {
628                    break;
629                }
630
631                /* Fall through */
632                /*lint -fallthrough */
633
634            case AML_INT_EVAL_SUBTREE_OP:
635
636                Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
637                            AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
638                break;
639
640            default:
641
642                Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
643                break;
644            }
645
646            /*
647             * If a result object was returned from above, push it on the
648             * current result stack
649             */
650            if (WalkState->ResultObj)
651            {
652                Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
653            }
654            break;
655
656        case AML_TYPE_NAMED_FIELD:
657        case AML_TYPE_NAMED_COMPLEX:
658        case AML_TYPE_NAMED_SIMPLE:
659        case AML_TYPE_NAMED_NO_OBJ:
660
661            Status = AcpiDsLoad2EndOp (WalkState);
662            if (ACPI_FAILURE (Status))
663            {
664                break;
665            }
666
667            if (Op->Common.AmlOpcode == AML_REGION_OP)
668            {
669                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
670                    "Executing OpRegion Address/Length Op=%p\n", Op));
671
672                Status = AcpiDsEvalRegionOperands (WalkState, Op);
673                if (ACPI_FAILURE (Status))
674                {
675                    break;
676                }
677            }
678            else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
679            {
680                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
681                    "Executing DataTableRegion Strings Op=%p\n", Op));
682
683                Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
684                if (ACPI_FAILURE (Status))
685                {
686                    break;
687                }
688            }
689            else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
690            {
691                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
692                    "Executing BankField Op=%p\n", Op));
693
694                Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
695                if (ACPI_FAILURE (Status))
696                {
697                    break;
698                }
699            }
700            break;
701
702        case AML_TYPE_UNDEFINED:
703
704            ACPI_ERROR ((AE_INFO,
705                "Undefined opcode type Op=%p", Op));
706            return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
707
708        case AML_TYPE_BOGUS:
709
710            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
711                "Internal opcode=%X type Op=%p\n",
712                WalkState->Opcode, Op));
713            break;
714
715        default:
716
717            ACPI_ERROR ((AE_INFO,
718                "Unimplemented opcode, class=0x%X type=0x%X Opcode=0x%X Op=%p",
719                OpClass, OpType, Op->Common.AmlOpcode, Op));
720
721            Status = AE_NOT_IMPLEMENTED;
722            break;
723        }
724    }
725
726    /*
727     * ACPI 2.0 support for 64-bit integers: Truncate numeric
728     * result value if we are executing from a 32-bit ACPI table
729     */
730    (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
731
732    /*
733     * Check if we just completed the evaluation of a
734     * conditional predicate
735     */
736    if ((ACPI_SUCCESS (Status)) &&
737        (WalkState->ControlState) &&
738        (WalkState->ControlState->Common.State ==
739            ACPI_CONTROL_PREDICATE_EXECUTING) &&
740        (WalkState->ControlState->Control.PredicateOp == Op))
741    {
742        Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
743        WalkState->ResultObj = NULL;
744    }
745
746
747Cleanup:
748
749    if (WalkState->ResultObj)
750    {
751        /* Break to debugger to display result */
752
753        ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (WalkState->ResultObj,
754                                WalkState));
755
756        /*
757         * Delete the result op if and only if:
758         * Parent will not use the result -- such as any
759         * non-nested type2 op in a method (parent will be method)
760         */
761        AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
762    }
763
764#ifdef _UNDER_DEVELOPMENT
765
766    if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
767    {
768        AcpiDbMethodEnd (WalkState);
769    }
770#endif
771
772    /* Invoke exception handler on error */
773
774    if (ACPI_FAILURE (Status))
775    {
776        Status = AcpiDsMethodError (Status, WalkState);
777    }
778
779    /* Always clear the object stack */
780
781    WalkState->NumOperands = 0;
782    return_ACPI_STATUS (Status);
783}
784