1 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
2 | /****************************************************************************** |
3 | * |
4 | * Module Name: exresop - AML Interpreter operand/object resolution |
5 | * |
6 | * Copyright (C) 2000 - 2023, Intel Corp. |
7 | * |
8 | *****************************************************************************/ |
9 | |
10 | #include <acpi/acpi.h> |
11 | #include "accommon.h" |
12 | #include "amlcode.h" |
13 | #include "acparser.h" |
14 | #include "acinterp.h" |
15 | #include "acnamesp.h" |
16 | |
17 | #define _COMPONENT ACPI_EXECUTER |
18 | ACPI_MODULE_NAME("exresop" ) |
19 | |
20 | /* Local prototypes */ |
21 | static acpi_status |
22 | acpi_ex_check_object_type(acpi_object_type type_needed, |
23 | acpi_object_type this_type, void *object); |
24 | |
25 | /******************************************************************************* |
26 | * |
27 | * FUNCTION: acpi_ex_check_object_type |
28 | * |
29 | * PARAMETERS: type_needed Object type needed |
30 | * this_type Actual object type |
31 | * Object Object pointer |
32 | * |
33 | * RETURN: Status |
34 | * |
35 | * DESCRIPTION: Check required type against actual type |
36 | * |
37 | ******************************************************************************/ |
38 | |
39 | static acpi_status |
40 | acpi_ex_check_object_type(acpi_object_type type_needed, |
41 | acpi_object_type this_type, void *object) |
42 | { |
43 | ACPI_FUNCTION_ENTRY(); |
44 | |
45 | if (type_needed == ACPI_TYPE_ANY) { |
46 | |
47 | /* All types OK, so we don't perform any typechecks */ |
48 | |
49 | return (AE_OK); |
50 | } |
51 | |
52 | if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) { |
53 | /* |
54 | * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference |
55 | * objects and thus allow them to be targets. (As per the ACPI |
56 | * specification, a store to a constant is a noop.) |
57 | */ |
58 | if ((this_type == ACPI_TYPE_INTEGER) && |
59 | (((union acpi_operand_object *)object)->common.flags & |
60 | AOPOBJ_AML_CONSTANT)) { |
61 | return (AE_OK); |
62 | } |
63 | } |
64 | |
65 | if (type_needed != this_type) { |
66 | ACPI_ERROR((AE_INFO, |
67 | "Needed type [%s], found [%s] %p" , |
68 | acpi_ut_get_type_name(type_needed), |
69 | acpi_ut_get_type_name(this_type), object)); |
70 | |
71 | return (AE_AML_OPERAND_TYPE); |
72 | } |
73 | |
74 | return (AE_OK); |
75 | } |
76 | |
77 | /******************************************************************************* |
78 | * |
79 | * FUNCTION: acpi_ex_resolve_operands |
80 | * |
81 | * PARAMETERS: opcode - Opcode being interpreted |
82 | * stack_ptr - Pointer to the operand stack to be |
83 | * resolved |
84 | * walk_state - Current state |
85 | * |
86 | * RETURN: Status |
87 | * |
88 | * DESCRIPTION: Convert multiple input operands to the types required by the |
89 | * target operator. |
90 | * |
91 | * Each 5-bit group in arg_types represents one required |
92 | * operand and indicates the required Type. The corresponding operand |
93 | * will be converted to the required type if possible, otherwise we |
94 | * abort with an exception. |
95 | * |
96 | ******************************************************************************/ |
97 | |
98 | acpi_status |
99 | acpi_ex_resolve_operands(u16 opcode, |
100 | union acpi_operand_object **stack_ptr, |
101 | struct acpi_walk_state *walk_state) |
102 | { |
103 | union acpi_operand_object *obj_desc; |
104 | acpi_status status = AE_OK; |
105 | u8 object_type; |
106 | u32 arg_types; |
107 | const struct acpi_opcode_info *op_info; |
108 | u32 this_arg_type; |
109 | acpi_object_type type_needed; |
110 | u16 target_op = 0; |
111 | |
112 | ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode); |
113 | |
114 | op_info = acpi_ps_get_opcode_info(opcode); |
115 | if (op_info->class == AML_CLASS_UNKNOWN) { |
116 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
117 | } |
118 | |
119 | arg_types = op_info->runtime_args; |
120 | if (arg_types == ARGI_INVALID_OPCODE) { |
121 | ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X" , opcode)); |
122 | |
123 | return_ACPI_STATUS(AE_AML_INTERNAL); |
124 | } |
125 | |
126 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
127 | "Opcode %X [%s] RequiredOperandTypes=%8.8X\n" , |
128 | opcode, op_info->name, arg_types)); |
129 | |
130 | /* |
131 | * Normal exit is with (arg_types == 0) at end of argument list. |
132 | * Function will return an exception from within the loop upon |
133 | * finding an entry which is not (or cannot be converted |
134 | * to) the required type; if stack underflows; or upon |
135 | * finding a NULL stack entry (which should not happen). |
136 | */ |
137 | while (GET_CURRENT_ARG_TYPE(arg_types)) { |
138 | if (!stack_ptr || !*stack_ptr) { |
139 | ACPI_ERROR((AE_INFO, "Null stack entry at %p" , |
140 | stack_ptr)); |
141 | |
142 | return_ACPI_STATUS(AE_AML_INTERNAL); |
143 | } |
144 | |
145 | /* Extract useful items */ |
146 | |
147 | obj_desc = *stack_ptr; |
148 | |
149 | /* Decode the descriptor type */ |
150 | |
151 | switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { |
152 | case ACPI_DESC_TYPE_NAMED: |
153 | |
154 | /* Namespace Node */ |
155 | |
156 | object_type = |
157 | ((struct acpi_namespace_node *)obj_desc)->type; |
158 | |
159 | /* |
160 | * Resolve an alias object. The construction of these objects |
161 | * guarantees that there is only one level of alias indirection; |
162 | * thus, the attached object is always the aliased namespace node |
163 | */ |
164 | if (object_type == ACPI_TYPE_LOCAL_ALIAS) { |
165 | obj_desc = acpi_ns_get_attached_object(node: (struct |
166 | acpi_namespace_node |
167 | *) |
168 | obj_desc); |
169 | *stack_ptr = obj_desc; |
170 | object_type = |
171 | ((struct acpi_namespace_node *)obj_desc)-> |
172 | type; |
173 | } |
174 | break; |
175 | |
176 | case ACPI_DESC_TYPE_OPERAND: |
177 | |
178 | /* ACPI internal object */ |
179 | |
180 | object_type = obj_desc->common.type; |
181 | |
182 | /* Check for bad acpi_object_type */ |
183 | |
184 | if (!acpi_ut_valid_object_type(type: object_type)) { |
185 | ACPI_ERROR((AE_INFO, |
186 | "Bad operand object type [0x%X]" , |
187 | object_type)); |
188 | |
189 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
190 | } |
191 | |
192 | if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) { |
193 | |
194 | /* Validate the Reference */ |
195 | |
196 | switch (obj_desc->reference.class) { |
197 | case ACPI_REFCLASS_DEBUG: |
198 | |
199 | target_op = AML_DEBUG_OP; |
200 | |
201 | ACPI_FALLTHROUGH; |
202 | |
203 | case ACPI_REFCLASS_ARG: |
204 | case ACPI_REFCLASS_LOCAL: |
205 | case ACPI_REFCLASS_INDEX: |
206 | case ACPI_REFCLASS_REFOF: |
207 | case ACPI_REFCLASS_TABLE: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */ |
208 | case ACPI_REFCLASS_NAME: /* Reference to a named object */ |
209 | |
210 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
211 | "Operand is a Reference, Class [%s] %2.2X\n" , |
212 | acpi_ut_get_reference_name |
213 | (obj_desc), |
214 | obj_desc->reference. |
215 | class)); |
216 | break; |
217 | |
218 | default: |
219 | |
220 | ACPI_ERROR((AE_INFO, |
221 | "Unknown Reference Class 0x%2.2X in %p" , |
222 | obj_desc->reference.class, |
223 | obj_desc)); |
224 | |
225 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
226 | } |
227 | } |
228 | break; |
229 | |
230 | default: |
231 | |
232 | /* Invalid descriptor */ |
233 | |
234 | ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]" , |
235 | obj_desc, |
236 | acpi_ut_get_descriptor_name(obj_desc))); |
237 | |
238 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
239 | } |
240 | |
241 | /* Get one argument type, point to the next */ |
242 | |
243 | this_arg_type = GET_CURRENT_ARG_TYPE(arg_types); |
244 | INCREMENT_ARG_LIST(arg_types); |
245 | |
246 | /* |
247 | * Handle cases where the object does not need to be |
248 | * resolved to a value |
249 | */ |
250 | switch (this_arg_type) { |
251 | case ARGI_REF_OR_STRING: /* Can be a String or Reference */ |
252 | |
253 | if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) == |
254 | ACPI_DESC_TYPE_OPERAND) && |
255 | (obj_desc->common.type == ACPI_TYPE_STRING)) { |
256 | /* |
257 | * String found - the string references a named object and |
258 | * must be resolved to a node |
259 | */ |
260 | goto next_operand; |
261 | } |
262 | |
263 | /* |
264 | * Else not a string - fall through to the normal Reference |
265 | * case below |
266 | */ |
267 | ACPI_FALLTHROUGH; |
268 | |
269 | case ARGI_REFERENCE: /* References: */ |
270 | case ARGI_INTEGER_REF: |
271 | case ARGI_OBJECT_REF: |
272 | case ARGI_DEVICE_REF: |
273 | case ARGI_TARGETREF: /* Allows implicit conversion rules before store */ |
274 | case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */ |
275 | case ARGI_SIMPLE_TARGET: /* Name, Local, or arg - no implicit conversion */ |
276 | case ARGI_STORE_TARGET: |
277 | |
278 | /* |
279 | * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE |
280 | * A Namespace Node is OK as-is |
281 | */ |
282 | if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) == |
283 | ACPI_DESC_TYPE_NAMED) { |
284 | goto next_operand; |
285 | } |
286 | |
287 | status = |
288 | acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE, |
289 | this_type: object_type, object: obj_desc); |
290 | if (ACPI_FAILURE(status)) { |
291 | return_ACPI_STATUS(status); |
292 | } |
293 | goto next_operand; |
294 | |
295 | case ARGI_DATAREFOBJ: /* Store operator only */ |
296 | /* |
297 | * We don't want to resolve index_op reference objects during |
298 | * a store because this would be an implicit de_ref_of operation. |
299 | * Instead, we just want to store the reference object. |
300 | * -- All others must be resolved below. |
301 | */ |
302 | if ((opcode == AML_STORE_OP) && |
303 | ((*stack_ptr)->common.type == |
304 | ACPI_TYPE_LOCAL_REFERENCE) |
305 | && ((*stack_ptr)->reference.class == |
306 | ACPI_REFCLASS_INDEX)) { |
307 | goto next_operand; |
308 | } |
309 | break; |
310 | |
311 | default: |
312 | |
313 | /* All cases covered above */ |
314 | |
315 | break; |
316 | } |
317 | |
318 | /* |
319 | * Resolve this object to a value |
320 | */ |
321 | status = acpi_ex_resolve_to_value(stack_ptr, walk_state); |
322 | if (ACPI_FAILURE(status)) { |
323 | return_ACPI_STATUS(status); |
324 | } |
325 | |
326 | /* Get the resolved object */ |
327 | |
328 | obj_desc = *stack_ptr; |
329 | |
330 | /* |
331 | * Check the resulting object (value) type |
332 | */ |
333 | switch (this_arg_type) { |
334 | /* |
335 | * For the simple cases, only one type of resolved object |
336 | * is allowed |
337 | */ |
338 | case ARGI_MUTEX: |
339 | |
340 | /* Need an operand of type ACPI_TYPE_MUTEX */ |
341 | |
342 | type_needed = ACPI_TYPE_MUTEX; |
343 | break; |
344 | |
345 | case ARGI_EVENT: |
346 | |
347 | /* Need an operand of type ACPI_TYPE_EVENT */ |
348 | |
349 | type_needed = ACPI_TYPE_EVENT; |
350 | break; |
351 | |
352 | case ARGI_PACKAGE: /* Package */ |
353 | |
354 | /* Need an operand of type ACPI_TYPE_PACKAGE */ |
355 | |
356 | type_needed = ACPI_TYPE_PACKAGE; |
357 | break; |
358 | |
359 | case ARGI_ANYTYPE: |
360 | |
361 | /* Any operand type will do */ |
362 | |
363 | type_needed = ACPI_TYPE_ANY; |
364 | break; |
365 | |
366 | case ARGI_DDBHANDLE: |
367 | |
368 | /* Need an operand of type ACPI_TYPE_DDB_HANDLE */ |
369 | |
370 | type_needed = ACPI_TYPE_LOCAL_REFERENCE; |
371 | break; |
372 | |
373 | /* |
374 | * The more complex cases allow multiple resolved object types |
375 | */ |
376 | case ARGI_INTEGER: |
377 | |
378 | /* |
379 | * Need an operand of type ACPI_TYPE_INTEGER, but we can |
380 | * implicitly convert from a STRING or BUFFER. |
381 | * |
382 | * Known as "Implicit Source Operand Conversion" |
383 | */ |
384 | status = acpi_ex_convert_to_integer(obj_desc, result_desc: stack_ptr, |
385 | ACPI_IMPLICIT_CONVERSION); |
386 | if (ACPI_FAILURE(status)) { |
387 | if (status == AE_TYPE) { |
388 | ACPI_ERROR((AE_INFO, |
389 | "Needed [Integer/String/Buffer], found [%s] %p" , |
390 | acpi_ut_get_object_type_name |
391 | (obj_desc), obj_desc)); |
392 | |
393 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
394 | } |
395 | |
396 | return_ACPI_STATUS(status); |
397 | } |
398 | |
399 | if (obj_desc != *stack_ptr) { |
400 | acpi_ut_remove_reference(object: obj_desc); |
401 | } |
402 | goto next_operand; |
403 | |
404 | case ARGI_BUFFER: |
405 | /* |
406 | * Need an operand of type ACPI_TYPE_BUFFER, |
407 | * But we can implicitly convert from a STRING or INTEGER |
408 | * aka - "Implicit Source Operand Conversion" |
409 | */ |
410 | status = acpi_ex_convert_to_buffer(obj_desc, result_desc: stack_ptr); |
411 | if (ACPI_FAILURE(status)) { |
412 | if (status == AE_TYPE) { |
413 | ACPI_ERROR((AE_INFO, |
414 | "Needed [Integer/String/Buffer], found [%s] %p" , |
415 | acpi_ut_get_object_type_name |
416 | (obj_desc), obj_desc)); |
417 | |
418 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
419 | } |
420 | |
421 | return_ACPI_STATUS(status); |
422 | } |
423 | |
424 | if (obj_desc != *stack_ptr) { |
425 | acpi_ut_remove_reference(object: obj_desc); |
426 | } |
427 | goto next_operand; |
428 | |
429 | case ARGI_STRING: |
430 | /* |
431 | * Need an operand of type ACPI_TYPE_STRING, |
432 | * But we can implicitly convert from a BUFFER or INTEGER |
433 | * aka - "Implicit Source Operand Conversion" |
434 | */ |
435 | status = |
436 | acpi_ex_convert_to_string(obj_desc, result_desc: stack_ptr, |
437 | ACPI_IMPLICIT_CONVERT_HEX); |
438 | if (ACPI_FAILURE(status)) { |
439 | if (status == AE_TYPE) { |
440 | ACPI_ERROR((AE_INFO, |
441 | "Needed [Integer/String/Buffer], found [%s] %p" , |
442 | acpi_ut_get_object_type_name |
443 | (obj_desc), obj_desc)); |
444 | |
445 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
446 | } |
447 | |
448 | return_ACPI_STATUS(status); |
449 | } |
450 | |
451 | if (obj_desc != *stack_ptr) { |
452 | acpi_ut_remove_reference(object: obj_desc); |
453 | } |
454 | goto next_operand; |
455 | |
456 | case ARGI_COMPUTEDATA: |
457 | |
458 | /* Need an operand of type INTEGER, STRING or BUFFER */ |
459 | |
460 | switch (obj_desc->common.type) { |
461 | case ACPI_TYPE_INTEGER: |
462 | case ACPI_TYPE_STRING: |
463 | case ACPI_TYPE_BUFFER: |
464 | |
465 | /* Valid operand */ |
466 | break; |
467 | |
468 | default: |
469 | ACPI_ERROR((AE_INFO, |
470 | "Needed [Integer/String/Buffer], found [%s] %p" , |
471 | acpi_ut_get_object_type_name |
472 | (obj_desc), obj_desc)); |
473 | |
474 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
475 | } |
476 | goto next_operand; |
477 | |
478 | case ARGI_BUFFER_OR_STRING: |
479 | |
480 | /* Need an operand of type STRING or BUFFER */ |
481 | |
482 | switch (obj_desc->common.type) { |
483 | case ACPI_TYPE_STRING: |
484 | case ACPI_TYPE_BUFFER: |
485 | |
486 | /* Valid operand */ |
487 | break; |
488 | |
489 | case ACPI_TYPE_INTEGER: |
490 | |
491 | /* Highest priority conversion is to type Buffer */ |
492 | |
493 | status = |
494 | acpi_ex_convert_to_buffer(obj_desc, |
495 | result_desc: stack_ptr); |
496 | if (ACPI_FAILURE(status)) { |
497 | return_ACPI_STATUS(status); |
498 | } |
499 | |
500 | if (obj_desc != *stack_ptr) { |
501 | acpi_ut_remove_reference(object: obj_desc); |
502 | } |
503 | break; |
504 | |
505 | default: |
506 | ACPI_ERROR((AE_INFO, |
507 | "Needed [Integer/String/Buffer], found [%s] %p" , |
508 | acpi_ut_get_object_type_name |
509 | (obj_desc), obj_desc)); |
510 | |
511 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
512 | } |
513 | goto next_operand; |
514 | |
515 | case ARGI_DATAOBJECT: |
516 | /* |
517 | * ARGI_DATAOBJECT is only used by the size_of operator. |
518 | * Need a buffer, string, package, or ref_of reference. |
519 | * |
520 | * The only reference allowed here is a direct reference to |
521 | * a namespace node. |
522 | */ |
523 | switch (obj_desc->common.type) { |
524 | case ACPI_TYPE_PACKAGE: |
525 | case ACPI_TYPE_STRING: |
526 | case ACPI_TYPE_BUFFER: |
527 | case ACPI_TYPE_LOCAL_REFERENCE: |
528 | |
529 | /* Valid operand */ |
530 | break; |
531 | |
532 | default: |
533 | |
534 | ACPI_ERROR((AE_INFO, |
535 | "Needed [Buffer/String/Package/Reference], found [%s] %p" , |
536 | acpi_ut_get_object_type_name |
537 | (obj_desc), obj_desc)); |
538 | |
539 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
540 | } |
541 | goto next_operand; |
542 | |
543 | case ARGI_COMPLEXOBJ: |
544 | |
545 | /* Need a buffer or package or (ACPI 2.0) String */ |
546 | |
547 | switch (obj_desc->common.type) { |
548 | case ACPI_TYPE_PACKAGE: |
549 | case ACPI_TYPE_STRING: |
550 | case ACPI_TYPE_BUFFER: |
551 | |
552 | /* Valid operand */ |
553 | break; |
554 | |
555 | default: |
556 | |
557 | ACPI_ERROR((AE_INFO, |
558 | "Needed [Buffer/String/Package], found [%s] %p" , |
559 | acpi_ut_get_object_type_name |
560 | (obj_desc), obj_desc)); |
561 | |
562 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
563 | } |
564 | goto next_operand; |
565 | |
566 | case ARGI_REGION_OR_BUFFER: /* Used by Load() only */ |
567 | |
568 | /* |
569 | * Need an operand of type REGION or a BUFFER |
570 | * (which could be a resolved region field) |
571 | */ |
572 | switch (obj_desc->common.type) { |
573 | case ACPI_TYPE_BUFFER: |
574 | case ACPI_TYPE_REGION: |
575 | |
576 | /* Valid operand */ |
577 | break; |
578 | |
579 | default: |
580 | |
581 | ACPI_ERROR((AE_INFO, |
582 | "Needed [Region/Buffer], found [%s] %p" , |
583 | acpi_ut_get_object_type_name |
584 | (obj_desc), obj_desc)); |
585 | |
586 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
587 | } |
588 | goto next_operand; |
589 | |
590 | case ARGI_DATAREFOBJ: |
591 | |
592 | /* Used by the Store() operator only */ |
593 | |
594 | switch (obj_desc->common.type) { |
595 | case ACPI_TYPE_INTEGER: |
596 | case ACPI_TYPE_PACKAGE: |
597 | case ACPI_TYPE_STRING: |
598 | case ACPI_TYPE_BUFFER: |
599 | case ACPI_TYPE_BUFFER_FIELD: |
600 | case ACPI_TYPE_LOCAL_REFERENCE: |
601 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
602 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
603 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
604 | case ACPI_TYPE_DDB_HANDLE: |
605 | |
606 | /* Valid operand */ |
607 | break; |
608 | |
609 | default: |
610 | |
611 | if (acpi_gbl_enable_interpreter_slack) { |
612 | /* |
613 | * Enable original behavior of Store(), allowing any |
614 | * and all objects as the source operand. The ACPI |
615 | * spec does not allow this, however. |
616 | */ |
617 | break; |
618 | } |
619 | |
620 | if (target_op == AML_DEBUG_OP) { |
621 | |
622 | /* Allow store of any object to the Debug object */ |
623 | |
624 | break; |
625 | } |
626 | |
627 | ACPI_ERROR((AE_INFO, |
628 | "Needed Integer/Buffer/String/Package/Ref/Ddb]" |
629 | ", found [%s] %p" , |
630 | acpi_ut_get_object_type_name |
631 | (obj_desc), obj_desc)); |
632 | |
633 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
634 | } |
635 | goto next_operand; |
636 | |
637 | default: |
638 | |
639 | /* Unknown type */ |
640 | |
641 | ACPI_ERROR((AE_INFO, |
642 | "Internal - Unknown ARGI (required operand) type 0x%X" , |
643 | this_arg_type)); |
644 | |
645 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
646 | } |
647 | |
648 | /* |
649 | * Make sure that the original object was resolved to the |
650 | * required object type (Simple cases only). |
651 | */ |
652 | status = |
653 | acpi_ex_check_object_type(type_needed, |
654 | this_type: (*stack_ptr)->common.type, |
655 | object: *stack_ptr); |
656 | if (ACPI_FAILURE(status)) { |
657 | return_ACPI_STATUS(status); |
658 | } |
659 | |
660 | next_operand: |
661 | /* |
662 | * If more operands needed, decrement stack_ptr to point |
663 | * to next operand on stack |
664 | */ |
665 | if (GET_CURRENT_ARG_TYPE(arg_types)) { |
666 | stack_ptr--; |
667 | } |
668 | } |
669 | |
670 | ACPI_DUMP_OPERANDS(walk_state->operands, |
671 | acpi_ps_get_opcode_name(opcode), |
672 | walk_state->num_operands); |
673 | |
674 | return_ACPI_STATUS(status); |
675 | } |
676 | |