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Linux kernel mirror (for testing)
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1
2/******************************************************************************
3 *
4 * Module Name: exresop - AML Interpreter operand/object resolution
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2005, R. Byron Moore
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#include <acpi/acpi.h>
46#include <acpi/amlcode.h>
47#include <acpi/acparser.h>
48#include <acpi/acinterp.h>
49
50#define _COMPONENT ACPI_EXECUTER
51ACPI_MODULE_NAME("exresop")
52
53/* Local prototypes */
54static acpi_status
55acpi_ex_check_object_type(acpi_object_type type_needed,
56 acpi_object_type this_type, void *object);
57
58/*******************************************************************************
59 *
60 * FUNCTION: acpi_ex_check_object_type
61 *
62 * PARAMETERS: type_needed Object type needed
63 * this_type Actual object type
64 * Object Object pointer
65 *
66 * RETURN: Status
67 *
68 * DESCRIPTION: Check required type against actual type
69 *
70 ******************************************************************************/
71
72static acpi_status
73acpi_ex_check_object_type(acpi_object_type type_needed,
74 acpi_object_type this_type, void *object)
75{
76 ACPI_FUNCTION_NAME("ex_check_object_type");
77
78 if (type_needed == ACPI_TYPE_ANY) {
79 /* All types OK, so we don't perform any typechecks */
80
81 return (AE_OK);
82 }
83
84 if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
85 /*
86 * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
87 * objects and thus allow them to be targets. (As per the ACPI
88 * specification, a store to a constant is a noop.)
89 */
90 if ((this_type == ACPI_TYPE_INTEGER) &&
91 (((union acpi_operand_object *)object)->common.
92 flags & AOPOBJ_AML_CONSTANT)) {
93 return (AE_OK);
94 }
95 }
96
97 if (type_needed != this_type) {
98 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
99 "Needed [%s], found [%s] %p\n",
100 acpi_ut_get_type_name(type_needed),
101 acpi_ut_get_type_name(this_type), object));
102
103 return (AE_AML_OPERAND_TYPE);
104 }
105
106 return (AE_OK);
107}
108
109/*******************************************************************************
110 *
111 * FUNCTION: acpi_ex_resolve_operands
112 *
113 * PARAMETERS: Opcode - Opcode being interpreted
114 * stack_ptr - Pointer to the operand stack to be
115 * resolved
116 * walk_state - Current state
117 *
118 * RETURN: Status
119 *
120 * DESCRIPTION: Convert multiple input operands to the types required by the
121 * target operator.
122 *
123 * Each 5-bit group in arg_types represents one required
124 * operand and indicates the required Type. The corresponding operand
125 * will be converted to the required type if possible, otherwise we
126 * abort with an exception.
127 *
128 ******************************************************************************/
129
130acpi_status
131acpi_ex_resolve_operands(u16 opcode,
132 union acpi_operand_object ** stack_ptr,
133 struct acpi_walk_state * walk_state)
134{
135 union acpi_operand_object *obj_desc;
136 acpi_status status = AE_OK;
137 u8 object_type;
138 void *temp_node;
139 u32 arg_types;
140 const struct acpi_opcode_info *op_info;
141 u32 this_arg_type;
142 acpi_object_type type_needed;
143 u16 target_op = 0;
144
145 ACPI_FUNCTION_TRACE_U32("ex_resolve_operands", opcode);
146
147 op_info = acpi_ps_get_opcode_info(opcode);
148 if (op_info->class == AML_CLASS_UNKNOWN) {
149 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
150 }
151
152 arg_types = op_info->runtime_args;
153 if (arg_types == ARGI_INVALID_OPCODE) {
154 ACPI_REPORT_ERROR(("resolve_operands: %X is not a valid AML opcode\n", opcode));
155
156 return_ACPI_STATUS(AE_AML_INTERNAL);
157 }
158
159 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
160 "Opcode %X [%s] required_operand_types=%8.8X \n",
161 opcode, op_info->name, arg_types));
162
163 /*
164 * Normal exit is with (arg_types == 0) at end of argument list.
165 * Function will return an exception from within the loop upon
166 * finding an entry which is not (or cannot be converted
167 * to) the required type; if stack underflows; or upon
168 * finding a NULL stack entry (which should not happen).
169 */
170 while (GET_CURRENT_ARG_TYPE(arg_types)) {
171 if (!stack_ptr || !*stack_ptr) {
172 ACPI_REPORT_ERROR(("resolve_operands: Null stack entry at %p\n", stack_ptr));
173
174 return_ACPI_STATUS(AE_AML_INTERNAL);
175 }
176
177 /* Extract useful items */
178
179 obj_desc = *stack_ptr;
180
181 /* Decode the descriptor type */
182
183 switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
184 case ACPI_DESC_TYPE_NAMED:
185
186 /* Namespace Node */
187
188 object_type =
189 ((struct acpi_namespace_node *)obj_desc)->type;
190 break;
191
192 case ACPI_DESC_TYPE_OPERAND:
193
194 /* ACPI internal object */
195
196 object_type = ACPI_GET_OBJECT_TYPE(obj_desc);
197
198 /* Check for bad acpi_object_type */
199
200 if (!acpi_ut_valid_object_type(object_type)) {
201 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
202 "Bad operand object type [%X]\n",
203 object_type));
204
205 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
206 }
207
208 if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
209 /* Decode the Reference */
210
211 op_info = acpi_ps_get_opcode_info(opcode);
212 if (op_info->class == AML_CLASS_UNKNOWN) {
213 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
214 }
215
216 switch (obj_desc->reference.opcode) {
217 case AML_DEBUG_OP:
218 target_op = AML_DEBUG_OP;
219
220 /*lint -fallthrough */
221
222 case AML_NAME_OP:
223 case AML_INDEX_OP:
224 case AML_REF_OF_OP:
225 case AML_ARG_OP:
226 case AML_LOCAL_OP:
227 case AML_LOAD_OP: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
228 case AML_INT_NAMEPATH_OP: /* Reference to a named object */
229
230 ACPI_DEBUG_ONLY_MEMBERS(ACPI_DEBUG_PRINT
231 ((ACPI_DB_EXEC,
232 "Operand is a Reference, ref_opcode [%s]\n",
233 (acpi_ps_get_opcode_info
234 (obj_desc->
235 reference.
236 opcode))->
237 name)));
238 break;
239
240 default:
241 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
242 "Operand is a Reference, Unknown Reference Opcode %X [%s]\n",
243 obj_desc->reference.
244 opcode,
245 (acpi_ps_get_opcode_info
246 (obj_desc->reference.
247 opcode))->name));
248
249 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
250 }
251 }
252 break;
253
254 default:
255
256 /* Invalid descriptor */
257
258 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
259 "Invalid descriptor %p [%s]\n",
260 obj_desc,
261 acpi_ut_get_descriptor_name
262 (obj_desc)));
263
264 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
265 }
266
267 /* Get one argument type, point to the next */
268
269 this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
270 INCREMENT_ARG_LIST(arg_types);
271
272 /*
273 * Handle cases where the object does not need to be
274 * resolved to a value
275 */
276 switch (this_arg_type) {
277 case ARGI_REF_OR_STRING: /* Can be a String or Reference */
278
279 if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
280 ACPI_DESC_TYPE_OPERAND)
281 && (ACPI_GET_OBJECT_TYPE(obj_desc) ==
282 ACPI_TYPE_STRING)) {
283 /*
284 * String found - the string references a named object and
285 * must be resolved to a node
286 */
287 goto next_operand;
288 }
289
290 /*
291 * Else not a string - fall through to the normal Reference
292 * case below
293 */
294 /*lint -fallthrough */
295
296 case ARGI_REFERENCE: /* References: */
297 case ARGI_INTEGER_REF:
298 case ARGI_OBJECT_REF:
299 case ARGI_DEVICE_REF:
300 case ARGI_TARGETREF: /* Allows implicit conversion rules before store */
301 case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
302 case ARGI_SIMPLE_TARGET: /* Name, Local, or Arg - no implicit conversion */
303
304 /*
305 * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
306 * A Namespace Node is OK as-is
307 */
308 if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
309 ACPI_DESC_TYPE_NAMED) {
310 goto next_operand;
311 }
312
313 status =
314 acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
315 object_type, obj_desc);
316 if (ACPI_FAILURE(status)) {
317 return_ACPI_STATUS(status);
318 }
319
320 if (obj_desc->reference.opcode == AML_NAME_OP) {
321 /* Convert a named reference to the actual named object */
322
323 temp_node = obj_desc->reference.object;
324 acpi_ut_remove_reference(obj_desc);
325 (*stack_ptr) = temp_node;
326 }
327 goto next_operand;
328
329 case ARGI_DATAREFOBJ: /* Store operator only */
330
331 /*
332 * We don't want to resolve index_op reference objects during
333 * a store because this would be an implicit de_ref_of operation.
334 * Instead, we just want to store the reference object.
335 * -- All others must be resolved below.
336 */
337 if ((opcode == AML_STORE_OP) &&
338 (ACPI_GET_OBJECT_TYPE(*stack_ptr) ==
339 ACPI_TYPE_LOCAL_REFERENCE)
340 && ((*stack_ptr)->reference.opcode ==
341 AML_INDEX_OP)) {
342 goto next_operand;
343 }
344 break;
345
346 default:
347 /* All cases covered above */
348 break;
349 }
350
351 /*
352 * Resolve this object to a value
353 */
354 status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
355 if (ACPI_FAILURE(status)) {
356 return_ACPI_STATUS(status);
357 }
358
359 /* Get the resolved object */
360
361 obj_desc = *stack_ptr;
362
363 /*
364 * Check the resulting object (value) type
365 */
366 switch (this_arg_type) {
367 /*
368 * For the simple cases, only one type of resolved object
369 * is allowed
370 */
371 case ARGI_MUTEX:
372
373 /* Need an operand of type ACPI_TYPE_MUTEX */
374
375 type_needed = ACPI_TYPE_MUTEX;
376 break;
377
378 case ARGI_EVENT:
379
380 /* Need an operand of type ACPI_TYPE_EVENT */
381
382 type_needed = ACPI_TYPE_EVENT;
383 break;
384
385 case ARGI_PACKAGE: /* Package */
386
387 /* Need an operand of type ACPI_TYPE_PACKAGE */
388
389 type_needed = ACPI_TYPE_PACKAGE;
390 break;
391
392 case ARGI_ANYTYPE:
393
394 /* Any operand type will do */
395
396 type_needed = ACPI_TYPE_ANY;
397 break;
398
399 case ARGI_DDBHANDLE:
400
401 /* Need an operand of type ACPI_TYPE_DDB_HANDLE */
402
403 type_needed = ACPI_TYPE_LOCAL_REFERENCE;
404 break;
405
406 /*
407 * The more complex cases allow multiple resolved object types
408 */
409 case ARGI_INTEGER:
410
411 /*
412 * Need an operand of type ACPI_TYPE_INTEGER,
413 * But we can implicitly convert from a STRING or BUFFER
414 * Aka - "Implicit Source Operand Conversion"
415 */
416 status =
417 acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
418 if (ACPI_FAILURE(status)) {
419 if (status == AE_TYPE) {
420 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
421 "Needed [Integer/String/Buffer], found [%s] %p\n",
422 acpi_ut_get_object_type_name
423 (obj_desc),
424 obj_desc));
425
426 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
427 }
428
429 return_ACPI_STATUS(status);
430 }
431
432 if (obj_desc != *stack_ptr) {
433 acpi_ut_remove_reference(obj_desc);
434 }
435 goto next_operand;
436
437 case ARGI_BUFFER:
438
439 /*
440 * Need an operand of type ACPI_TYPE_BUFFER,
441 * But we can implicitly convert from a STRING or INTEGER
442 * Aka - "Implicit Source Operand Conversion"
443 */
444 status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
445 if (ACPI_FAILURE(status)) {
446 if (status == AE_TYPE) {
447 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
448 "Needed [Integer/String/Buffer], found [%s] %p\n",
449 acpi_ut_get_object_type_name
450 (obj_desc),
451 obj_desc));
452
453 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
454 }
455
456 return_ACPI_STATUS(status);
457 }
458
459 if (obj_desc != *stack_ptr) {
460 acpi_ut_remove_reference(obj_desc);
461 }
462 goto next_operand;
463
464 case ARGI_STRING:
465
466 /*
467 * Need an operand of type ACPI_TYPE_STRING,
468 * But we can implicitly convert from a BUFFER or INTEGER
469 * Aka - "Implicit Source Operand Conversion"
470 */
471 status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
472 ACPI_IMPLICIT_CONVERT_HEX);
473 if (ACPI_FAILURE(status)) {
474 if (status == AE_TYPE) {
475 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
476 "Needed [Integer/String/Buffer], found [%s] %p\n",
477 acpi_ut_get_object_type_name
478 (obj_desc),
479 obj_desc));
480
481 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
482 }
483
484 return_ACPI_STATUS(status);
485 }
486
487 if (obj_desc != *stack_ptr) {
488 acpi_ut_remove_reference(obj_desc);
489 }
490 goto next_operand;
491
492 case ARGI_COMPUTEDATA:
493
494 /* Need an operand of type INTEGER, STRING or BUFFER */
495
496 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
497 case ACPI_TYPE_INTEGER:
498 case ACPI_TYPE_STRING:
499 case ACPI_TYPE_BUFFER:
500
501 /* Valid operand */
502 break;
503
504 default:
505 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
506 "Needed [Integer/String/Buffer], found [%s] %p\n",
507 acpi_ut_get_object_type_name
508 (obj_desc), obj_desc));
509
510 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
511 }
512 goto next_operand;
513
514 case ARGI_BUFFER_OR_STRING:
515
516 /* Need an operand of type STRING or BUFFER */
517
518 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
519 case ACPI_TYPE_STRING:
520 case ACPI_TYPE_BUFFER:
521
522 /* Valid operand */
523 break;
524
525 case ACPI_TYPE_INTEGER:
526
527 /* Highest priority conversion is to type Buffer */
528
529 status =
530 acpi_ex_convert_to_buffer(obj_desc,
531 stack_ptr);
532 if (ACPI_FAILURE(status)) {
533 return_ACPI_STATUS(status);
534 }
535
536 if (obj_desc != *stack_ptr) {
537 acpi_ut_remove_reference(obj_desc);
538 }
539 break;
540
541 default:
542 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
543 "Needed [Integer/String/Buffer], found [%s] %p\n",
544 acpi_ut_get_object_type_name
545 (obj_desc), obj_desc));
546
547 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
548 }
549 goto next_operand;
550
551 case ARGI_DATAOBJECT:
552 /*
553 * ARGI_DATAOBJECT is only used by the size_of operator.
554 * Need a buffer, string, package, or ref_of reference.
555 *
556 * The only reference allowed here is a direct reference to
557 * a namespace node.
558 */
559 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
560 case ACPI_TYPE_PACKAGE:
561 case ACPI_TYPE_STRING:
562 case ACPI_TYPE_BUFFER:
563 case ACPI_TYPE_LOCAL_REFERENCE:
564
565 /* Valid operand */
566 break;
567
568 default:
569 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
570 "Needed [Buffer/String/Package/Reference], found [%s] %p\n",
571 acpi_ut_get_object_type_name
572 (obj_desc), obj_desc));
573
574 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
575 }
576 goto next_operand;
577
578 case ARGI_COMPLEXOBJ:
579
580 /* Need a buffer or package or (ACPI 2.0) String */
581
582 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
583 case ACPI_TYPE_PACKAGE:
584 case ACPI_TYPE_STRING:
585 case ACPI_TYPE_BUFFER:
586
587 /* Valid operand */
588 break;
589
590 default:
591 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
592 "Needed [Buffer/String/Package], found [%s] %p\n",
593 acpi_ut_get_object_type_name
594 (obj_desc), obj_desc));
595
596 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
597 }
598 goto next_operand;
599
600 case ARGI_REGION_OR_FIELD:
601
602 /* Need an operand of type REGION or a FIELD in a region */
603
604 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
605 case ACPI_TYPE_REGION:
606 case ACPI_TYPE_LOCAL_REGION_FIELD:
607 case ACPI_TYPE_LOCAL_BANK_FIELD:
608 case ACPI_TYPE_LOCAL_INDEX_FIELD:
609
610 /* Valid operand */
611 break;
612
613 default:
614 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
615 "Needed [Region/region_field], found [%s] %p\n",
616 acpi_ut_get_object_type_name
617 (obj_desc), obj_desc));
618
619 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
620 }
621 goto next_operand;
622
623 case ARGI_DATAREFOBJ:
624
625 /* Used by the Store() operator only */
626
627 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
628 case ACPI_TYPE_INTEGER:
629 case ACPI_TYPE_PACKAGE:
630 case ACPI_TYPE_STRING:
631 case ACPI_TYPE_BUFFER:
632 case ACPI_TYPE_BUFFER_FIELD:
633 case ACPI_TYPE_LOCAL_REFERENCE:
634 case ACPI_TYPE_LOCAL_REGION_FIELD:
635 case ACPI_TYPE_LOCAL_BANK_FIELD:
636 case ACPI_TYPE_LOCAL_INDEX_FIELD:
637 case ACPI_TYPE_DDB_HANDLE:
638
639 /* Valid operand */
640 break;
641
642 default:
643
644 if (acpi_gbl_enable_interpreter_slack) {
645 /*
646 * Enable original behavior of Store(), allowing any and all
647 * objects as the source operand. The ACPI spec does not
648 * allow this, however.
649 */
650 break;
651 }
652
653 if (target_op == AML_DEBUG_OP) {
654 /* Allow store of any object to the Debug object */
655
656 break;
657 }
658
659 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
660 "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p\n",
661 acpi_ut_get_object_type_name
662 (obj_desc), obj_desc));
663
664 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
665 }
666 goto next_operand;
667
668 default:
669
670 /* Unknown type */
671
672 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
673 "Internal - Unknown ARGI (required operand) type %X\n",
674 this_arg_type));
675
676 return_ACPI_STATUS(AE_BAD_PARAMETER);
677 }
678
679 /*
680 * Make sure that the original object was resolved to the
681 * required object type (Simple cases only).
682 */
683 status = acpi_ex_check_object_type(type_needed,
684 ACPI_GET_OBJECT_TYPE
685 (*stack_ptr), *stack_ptr);
686 if (ACPI_FAILURE(status)) {
687 return_ACPI_STATUS(status);
688 }
689
690 next_operand:
691 /*
692 * If more operands needed, decrement stack_ptr to point
693 * to next operand on stack
694 */
695 if (GET_CURRENT_ARG_TYPE(arg_types)) {
696 stack_ptr--;
697 }
698 }
699
700 return_ACPI_STATUS(status);
701}