summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/exresop.c
blob: 9fb9f5e9a4daefe2f3a477eeb222d6ba1e560719 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
/******************************************************************************
 *
 * Module Name: exresop - AML Interpreter operand/object resolution
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2013, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "amlcode.h"
#include "acparser.h"
#include "acinterp.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_EXECUTER
ACPI_MODULE_NAME("exresop")

/* Local prototypes */
static acpi_status
acpi_ex_check_object_type(acpi_object_type type_needed,
			  acpi_object_type this_type, void *object);

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_check_object_type
 *
 * PARAMETERS:  type_needed         Object type needed
 *              this_type           Actual object type
 *              Object              Object pointer
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Check required type against actual type
 *
 ******************************************************************************/

static acpi_status
acpi_ex_check_object_type(acpi_object_type type_needed,
			  acpi_object_type this_type, void *object)
{
	ACPI_FUNCTION_ENTRY();

	if (type_needed == ACPI_TYPE_ANY) {

		/* All types OK, so we don't perform any typechecks */

		return (AE_OK);
	}

	if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
		/*
		 * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
		 * objects and thus allow them to be targets. (As per the ACPI
		 * specification, a store to a constant is a noop.)
		 */
		if ((this_type == ACPI_TYPE_INTEGER) &&
		    (((union acpi_operand_object *)object)->common.
		     flags & AOPOBJ_AML_CONSTANT)) {
			return (AE_OK);
		}
	}

	if (type_needed != this_type) {
		ACPI_ERROR((AE_INFO,
			    "Needed type [%s], found [%s] %p",
			    acpi_ut_get_type_name(type_needed),
			    acpi_ut_get_type_name(this_type), object));

		return (AE_AML_OPERAND_TYPE);
	}

	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_resolve_operands
 *
 * PARAMETERS:  opcode              - Opcode being interpreted
 *              stack_ptr           - Pointer to the operand stack to be
 *                                    resolved
 *              walk_state          - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert multiple input operands to the types required by the
 *              target operator.
 *
 *      Each 5-bit group in arg_types represents one required
 *      operand and indicates the required Type. The corresponding operand
 *      will be converted to the required type if possible, otherwise we
 *      abort with an exception.
 *
 ******************************************************************************/

acpi_status
acpi_ex_resolve_operands(u16 opcode,
			 union acpi_operand_object ** stack_ptr,
			 struct acpi_walk_state * walk_state)
{
	union acpi_operand_object *obj_desc;
	acpi_status status = AE_OK;
	u8 object_type;
	u32 arg_types;
	const struct acpi_opcode_info *op_info;
	u32 this_arg_type;
	acpi_object_type type_needed;
	u16 target_op = 0;

	ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode);

	op_info = acpi_ps_get_opcode_info(opcode);
	if (op_info->class == AML_CLASS_UNKNOWN) {
		return_ACPI_STATUS(AE_AML_BAD_OPCODE);
	}

	arg_types = op_info->runtime_args;
	if (arg_types == ARGI_INVALID_OPCODE) {
		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", opcode));

		return_ACPI_STATUS(AE_AML_INTERNAL);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
			  "Opcode %X [%s] RequiredOperandTypes=%8.8X\n",
			  opcode, op_info->name, arg_types));

	/*
	 * Normal exit is with (arg_types == 0) at end of argument list.
	 * Function will return an exception from within the loop upon
	 * finding an entry which is not (or cannot be converted
	 * to) the required type; if stack underflows; or upon
	 * finding a NULL stack entry (which should not happen).
	 */
	while (GET_CURRENT_ARG_TYPE(arg_types)) {
		if (!stack_ptr || !*stack_ptr) {
			ACPI_ERROR((AE_INFO, "Null stack entry at %p",
				    stack_ptr));

			return_ACPI_STATUS(AE_AML_INTERNAL);
		}

		/* Extract useful items */

		obj_desc = *stack_ptr;

		/* Decode the descriptor type */

		switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
		case ACPI_DESC_TYPE_NAMED:

			/* Namespace Node */

			object_type =
			    ((struct acpi_namespace_node *)obj_desc)->type;

			/*
			 * Resolve an alias object. The construction of these objects
			 * guarantees that there is only one level of alias indirection;
			 * thus, the attached object is always the aliased namespace node
			 */
			if (object_type == ACPI_TYPE_LOCAL_ALIAS) {
				obj_desc =
				    acpi_ns_get_attached_object((struct
								 acpi_namespace_node
								 *)obj_desc);
				*stack_ptr = obj_desc;
				object_type =
				    ((struct acpi_namespace_node *)obj_desc)->
				    type;
			}
			break;

		case ACPI_DESC_TYPE_OPERAND:

			/* ACPI internal object */

			object_type = obj_desc->common.type;

			/* Check for bad acpi_object_type */

			if (!acpi_ut_valid_object_type(object_type)) {
				ACPI_ERROR((AE_INFO,
					    "Bad operand object type [0x%X]",
					    object_type));

				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
			}

			if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {

				/* Validate the Reference */

				switch (obj_desc->reference.class) {
				case ACPI_REFCLASS_DEBUG:

					target_op = AML_DEBUG_OP;

					/*lint -fallthrough */

				case ACPI_REFCLASS_ARG:
				case ACPI_REFCLASS_LOCAL:
				case ACPI_REFCLASS_INDEX:
				case ACPI_REFCLASS_REFOF:
				case ACPI_REFCLASS_TABLE:	/* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
				case ACPI_REFCLASS_NAME:	/* Reference to a named object */

					ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
							  "Operand is a Reference, Class [%s] %2.2X\n",
							  acpi_ut_get_reference_name
							  (obj_desc),
							  obj_desc->reference.
							  class));
					break;

				default:

					ACPI_ERROR((AE_INFO,
						    "Unknown Reference Class 0x%2.2X in %p",
						    obj_desc->reference.class,
						    obj_desc));

					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
				}
			}
			break;

		default:

			/* Invalid descriptor */

			ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]",
				    obj_desc,
				    acpi_ut_get_descriptor_name(obj_desc)));

			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
		}

		/* Get one argument type, point to the next */

		this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
		INCREMENT_ARG_LIST(arg_types);

		/*
		 * Handle cases where the object does not need to be
		 * resolved to a value
		 */
		switch (this_arg_type) {
		case ARGI_REF_OR_STRING:	/* Can be a String or Reference */

			if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
			     ACPI_DESC_TYPE_OPERAND)
			    && (obj_desc->common.type == ACPI_TYPE_STRING)) {
				/*
				 * String found - the string references a named object and
				 * must be resolved to a node
				 */
				goto next_operand;
			}

			/*
			 * Else not a string - fall through to the normal Reference
			 * case below
			 */
			/*lint -fallthrough */

		case ARGI_REFERENCE:	/* References: */
		case ARGI_INTEGER_REF:
		case ARGI_OBJECT_REF:
		case ARGI_DEVICE_REF:
		case ARGI_TARGETREF:	/* Allows implicit conversion rules before store */
		case ARGI_FIXED_TARGET:	/* No implicit conversion before store to target */
		case ARGI_SIMPLE_TARGET:	/* Name, Local, or arg - no implicit conversion  */

			/*
			 * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
			 * A Namespace Node is OK as-is
			 */
			if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
			    ACPI_DESC_TYPE_NAMED) {
				goto next_operand;
			}

			status =
			    acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
						      object_type, obj_desc);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}
			goto next_operand;

		case ARGI_DATAREFOBJ:	/* Store operator only */

			/*
			 * We don't want to resolve index_op reference objects during
			 * a store because this would be an implicit de_ref_of operation.
			 * Instead, we just want to store the reference object.
			 * -- All others must be resolved below.
			 */
			if ((opcode == AML_STORE_OP) &&
			    ((*stack_ptr)->common.type ==
			     ACPI_TYPE_LOCAL_REFERENCE)
			    && ((*stack_ptr)->reference.class ==
				ACPI_REFCLASS_INDEX)) {
				goto next_operand;
			}
			break;

		default:
			/* All cases covered above */
			break;
		}

		/*
		 * Resolve this object to a value
		 */
		status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}

		/* Get the resolved object */

		obj_desc = *stack_ptr;

		/*
		 * Check the resulting object (value) type
		 */
		switch (this_arg_type) {
			/*
			 * For the simple cases, only one type of resolved object
			 * is allowed
			 */
		case ARGI_MUTEX:

			/* Need an operand of type ACPI_TYPE_MUTEX */

			type_needed = ACPI_TYPE_MUTEX;
			break;

		case ARGI_EVENT:

			/* Need an operand of type ACPI_TYPE_EVENT */

			type_needed = ACPI_TYPE_EVENT;
			break;

		case ARGI_PACKAGE:	/* Package */

			/* Need an operand of type ACPI_TYPE_PACKAGE */

			type_needed = ACPI_TYPE_PACKAGE;
			break;

		case ARGI_ANYTYPE:

			/* Any operand type will do */

			type_needed = ACPI_TYPE_ANY;
			break;

		case ARGI_DDBHANDLE:

			/* Need an operand of type ACPI_TYPE_DDB_HANDLE */

			type_needed = ACPI_TYPE_LOCAL_REFERENCE;
			break;

			/*
			 * The more complex cases allow multiple resolved object types
			 */
		case ARGI_INTEGER:

			/*
			 * Need an operand of type ACPI_TYPE_INTEGER,
			 * But we can implicitly convert from a STRING or BUFFER
			 * aka - "Implicit Source Operand Conversion"
			 */
			status =
			    acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
			if (ACPI_FAILURE(status)) {
				if (status == AE_TYPE) {
					ACPI_ERROR((AE_INFO,
						    "Needed [Integer/String/Buffer], found [%s] %p",
						    acpi_ut_get_object_type_name
						    (obj_desc), obj_desc));

					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
				}

				return_ACPI_STATUS(status);
			}

			if (obj_desc != *stack_ptr) {
				acpi_ut_remove_reference(obj_desc);
			}
			goto next_operand;

		case ARGI_BUFFER:

			/*
			 * Need an operand of type ACPI_TYPE_BUFFER,
			 * But we can implicitly convert from a STRING or INTEGER
			 * aka - "Implicit Source Operand Conversion"
			 */
			status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
			if (ACPI_FAILURE(status)) {
				if (status == AE_TYPE) {
					ACPI_ERROR((AE_INFO,
						    "Needed [Integer/String/Buffer], found [%s] %p",
						    acpi_ut_get_object_type_name
						    (obj_desc), obj_desc));

					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
				}

				return_ACPI_STATUS(status);
			}

			if (obj_desc != *stack_ptr) {
				acpi_ut_remove_reference(obj_desc);
			}
			goto next_operand;

		case ARGI_STRING:

			/*
			 * Need an operand of type ACPI_TYPE_STRING,
			 * But we can implicitly convert from a BUFFER or INTEGER
			 * aka - "Implicit Source Operand Conversion"
			 */
			status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
							   ACPI_IMPLICIT_CONVERT_HEX);
			if (ACPI_FAILURE(status)) {
				if (status == AE_TYPE) {
					ACPI_ERROR((AE_INFO,
						    "Needed [Integer/String/Buffer], found [%s] %p",
						    acpi_ut_get_object_type_name
						    (obj_desc), obj_desc));

					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
				}

				return_ACPI_STATUS(status);
			}

			if (obj_desc != *stack_ptr) {
				acpi_ut_remove_reference(obj_desc);
			}
			goto next_operand;

		case ARGI_COMPUTEDATA:

			/* Need an operand of type INTEGER, STRING or BUFFER */

			switch (obj_desc->common.type) {
			case ACPI_TYPE_INTEGER:
			case ACPI_TYPE_STRING:
			case ACPI_TYPE_BUFFER:

				/* Valid operand */
				break;

			default:
				ACPI_ERROR((AE_INFO,
					    "Needed [Integer/String/Buffer], found [%s] %p",
					    acpi_ut_get_object_type_name
					    (obj_desc), obj_desc));

				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
			}
			goto next_operand;

		case ARGI_BUFFER_OR_STRING:

			/* Need an operand of type STRING or BUFFER */

			switch (obj_desc->common.type) {
			case ACPI_TYPE_STRING:
			case ACPI_TYPE_BUFFER:

				/* Valid operand */
				break;

			case ACPI_TYPE_INTEGER:

				/* Highest priority conversion is to type Buffer */

				status =
				    acpi_ex_convert_to_buffer(obj_desc,
							      stack_ptr);
				if (ACPI_FAILURE(status)) {
					return_ACPI_STATUS(status);
				}

				if (obj_desc != *stack_ptr) {
					acpi_ut_remove_reference(obj_desc);
				}
				break;

			default:
				ACPI_ERROR((AE_INFO,
					    "Needed [Integer/String/Buffer], found [%s] %p",
					    acpi_ut_get_object_type_name
					    (obj_desc), obj_desc));

				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
			}
			goto next_operand;

		case ARGI_DATAOBJECT:
			/*
			 * ARGI_DATAOBJECT is only used by the size_of operator.
			 * Need a buffer, string, package, or ref_of reference.
			 *
			 * The only reference allowed here is a direct reference to
			 * a namespace node.
			 */
			switch (obj_desc->common.type) {
			case ACPI_TYPE_PACKAGE:
			case ACPI_TYPE_STRING:
			case ACPI_TYPE_BUFFER:
			case ACPI_TYPE_LOCAL_REFERENCE:

				/* Valid operand */
				break;

			default:
				ACPI_ERROR((AE_INFO,
					    "Needed [Buffer/String/Package/Reference], found [%s] %p",
					    acpi_ut_get_object_type_name
					    (obj_desc), obj_desc));

				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
			}
			goto next_operand;

		case ARGI_COMPLEXOBJ:

			/* Need a buffer or package or (ACPI 2.0) String */

			switch (obj_desc->common.type) {
			case ACPI_TYPE_PACKAGE:
			case ACPI_TYPE_STRING:
			case ACPI_TYPE_BUFFER:

				/* Valid operand */
				break;

			default:
				ACPI_ERROR((AE_INFO,
					    "Needed [Buffer/String/Package], found [%s] %p",
					    acpi_ut_get_object_type_name
					    (obj_desc), obj_desc));

				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
			}
			goto next_operand;

		case ARGI_REGION_OR_BUFFER:	/* Used by Load() only */

			/* Need an operand of type REGION or a BUFFER (which could be a resolved region field) */

			switch (obj_desc->common.type) {
			case ACPI_TYPE_BUFFER:
			case ACPI_TYPE_REGION:

				/* Valid operand */
				break;

			default:
				ACPI_ERROR((AE_INFO,
					    "Needed [Region/Buffer], found [%s] %p",
					    acpi_ut_get_object_type_name
					    (obj_desc), obj_desc));

				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
			}
			goto next_operand;

		case ARGI_DATAREFOBJ:

			/* Used by the Store() operator only */

			switch (obj_desc->common.type) {
			case ACPI_TYPE_INTEGER:
			case ACPI_TYPE_PACKAGE:
			case ACPI_TYPE_STRING:
			case ACPI_TYPE_BUFFER:
			case ACPI_TYPE_BUFFER_FIELD:
			case ACPI_TYPE_LOCAL_REFERENCE:
			case ACPI_TYPE_LOCAL_REGION_FIELD:
			case ACPI_TYPE_LOCAL_BANK_FIELD:
			case ACPI_TYPE_LOCAL_INDEX_FIELD:
			case ACPI_TYPE_DDB_HANDLE:

				/* Valid operand */
				break;

			default:

				if (acpi_gbl_enable_interpreter_slack) {
					/*
					 * Enable original behavior of Store(), allowing any and all
					 * objects as the source operand. The ACPI spec does not
					 * allow this, however.
					 */
					break;
				}

				if (target_op == AML_DEBUG_OP) {

					/* Allow store of any object to the Debug object */

					break;
				}

				ACPI_ERROR((AE_INFO,
					    "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p",
					    acpi_ut_get_object_type_name
					    (obj_desc), obj_desc));

				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
			}
			goto next_operand;

		default:

			/* Unknown type */

			ACPI_ERROR((AE_INFO,
				    "Internal - Unknown ARGI (required operand) type 0x%X",
				    this_arg_type));

			return_ACPI_STATUS(AE_BAD_PARAMETER);
		}

		/*
		 * Make sure that the original object was resolved to the
		 * required object type (Simple cases only).
		 */
		status = acpi_ex_check_object_type(type_needed,
						   (*stack_ptr)->common.type,
						   *stack_ptr);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}

	      next_operand:
		/*
		 * If more operands needed, decrement stack_ptr to point
		 * to next operand on stack
		 */
		if (GET_CURRENT_ARG_TYPE(arg_types)) {
			stack_ptr--;
		}
	}

	ACPI_DUMP_OPERANDS(walk_state->operands,
			   acpi_ps_get_opcode_name(opcode),
			   walk_state->num_operands);

	return_ACPI_STATUS(status);
}