1 /******************************************************************************
2 *
3 * Module Name: dswexec - Dispatcher method execution callbacks;
4 * dispatch to interpreter.
5 *
6 *****************************************************************************/
7
8 /*
9 * Copyright (C) 2000 - 2004, 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
46 #include <acpi/acpi.h>
47 #include <acpi/acparser.h>
48 #include <acpi/amlcode.h>
49 #include <acpi/acdispat.h>
50 #include <acpi/acinterp.h>
51 #include <acpi/acnamesp.h>
52 #include <acpi/acdebug.h>
53 #include <acpi/acdisasm.h>
54
55
56 #define _COMPONENT ACPI_DISPATCHER
57 ACPI_MODULE_NAME ("dswexec")
58
59 /*
60 * Dispatch table for opcode classes
61 */
62 static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch [] = {
63 acpi_ex_opcode_1A_0T_0R,
64 acpi_ex_opcode_1A_0T_1R,
65 acpi_ex_opcode_1A_1T_0R,
66 acpi_ex_opcode_1A_1T_1R,
67 acpi_ex_opcode_2A_0T_0R,
68 acpi_ex_opcode_2A_0T_1R,
69 acpi_ex_opcode_2A_1T_1R,
70 acpi_ex_opcode_2A_2T_1R,
71 acpi_ex_opcode_3A_0T_0R,
72 acpi_ex_opcode_3A_1T_1R,
73 acpi_ex_opcode_6A_0T_1R};
74
75 /*****************************************************************************
76 *
77 * FUNCTION: acpi_ds_get_predicate_value
78 *
79 * PARAMETERS: walk_state - Current state of the parse tree walk
80 *
81 * RETURN: Status
82 *
83 * DESCRIPTION: Get the result of a predicate evaluation
84 *
85 ****************************************************************************/
86
87 acpi_status
acpi_ds_get_predicate_value(struct acpi_walk_state * walk_state,union acpi_operand_object * result_obj)88 acpi_ds_get_predicate_value (
89 struct acpi_walk_state *walk_state,
90 union acpi_operand_object *result_obj) {
91 acpi_status status = AE_OK;
92 union acpi_operand_object *obj_desc;
93
94
95 ACPI_FUNCTION_TRACE_PTR ("ds_get_predicate_value", walk_state);
96
97
98 walk_state->control_state->common.state = 0;
99
100 if (result_obj) {
101 status = acpi_ds_result_pop (&obj_desc, walk_state);
102 if (ACPI_FAILURE (status)) {
103 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
104 "Could not get result from predicate evaluation, %s\n",
105 acpi_format_exception (status)));
106
107 return_ACPI_STATUS (status);
108 }
109 }
110 else {
111 status = acpi_ds_create_operand (walk_state, walk_state->op, 0);
112 if (ACPI_FAILURE (status)) {
113 return_ACPI_STATUS (status);
114 }
115
116 status = acpi_ex_resolve_to_value (&walk_state->operands [0], walk_state);
117 if (ACPI_FAILURE (status)) {
118 return_ACPI_STATUS (status);
119 }
120
121 obj_desc = walk_state->operands [0];
122 }
123
124 if (!obj_desc) {
125 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No predicate obj_desc=%p State=%p\n",
126 obj_desc, walk_state));
127
128 return_ACPI_STATUS (AE_AML_NO_OPERAND);
129 }
130
131 /*
132 * Result of predicate evaluation currently must
133 * be a number
134 */
135 if (ACPI_GET_OBJECT_TYPE (obj_desc) != ACPI_TYPE_INTEGER) {
136 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
137 "Bad predicate (not a number) obj_desc=%p State=%p Type=%X\n",
138 obj_desc, walk_state, ACPI_GET_OBJECT_TYPE (obj_desc)));
139
140 status = AE_AML_OPERAND_TYPE;
141 goto cleanup;
142 }
143
144 /* Truncate the predicate to 32-bits if necessary */
145
146 acpi_ex_truncate_for32bit_table (obj_desc);
147
148 /*
149 * Save the result of the predicate evaluation on
150 * the control stack
151 */
152 if (obj_desc->integer.value) {
153 walk_state->control_state->common.value = TRUE;
154 }
155 else {
156 /*
157 * Predicate is FALSE, we will just toss the
158 * rest of the package
159 */
160 walk_state->control_state->common.value = FALSE;
161 status = AE_CTRL_FALSE;
162 }
163
164
165 cleanup:
166
167 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
168 walk_state->control_state->common.value, walk_state->op));
169
170 /* Break to debugger to display result */
171
172 ACPI_DEBUGGER_EXEC (acpi_db_display_result_object (obj_desc, walk_state));
173
174 /*
175 * Delete the predicate result object (we know that
176 * we don't need it anymore)
177 */
178 acpi_ut_remove_reference (obj_desc);
179
180 walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
181 return_ACPI_STATUS (status);
182 }
183
184
185 /*****************************************************************************
186 *
187 * FUNCTION: acpi_ds_exec_begin_op
188 *
189 * PARAMETERS: walk_state - Current state of the parse tree walk
190 * out_op - Return op if a new one is created
191 *
192 * RETURN: Status
193 *
194 * DESCRIPTION: Descending callback used during the execution of control
195 * methods. This is where most operators and operands are
196 * dispatched to the interpreter.
197 *
198 ****************************************************************************/
199
200 acpi_status
acpi_ds_exec_begin_op(struct acpi_walk_state * walk_state,union acpi_parse_object ** out_op)201 acpi_ds_exec_begin_op (
202 struct acpi_walk_state *walk_state,
203 union acpi_parse_object **out_op)
204 {
205 union acpi_parse_object *op;
206 acpi_status status = AE_OK;
207 u32 opcode_class;
208
209
210 ACPI_FUNCTION_TRACE_PTR ("ds_exec_begin_op", walk_state);
211
212
213 op = walk_state->op;
214 if (!op) {
215 status = acpi_ds_load2_begin_op (walk_state, out_op);
216 if (ACPI_FAILURE (status)) {
217 return_ACPI_STATUS (status);
218 }
219
220 op = *out_op;
221 walk_state->op = op;
222 walk_state->opcode = op->common.aml_opcode;
223 walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
224
225 if (acpi_ns_opens_scope (walk_state->op_info->object_type)) {
226 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
227 acpi_ut_get_type_name (walk_state->op_info->object_type), op));
228
229 status = acpi_ds_scope_stack_pop (walk_state);
230 if (ACPI_FAILURE (status)) {
231 return_ACPI_STATUS (status);
232 }
233 }
234 }
235
236 if (op == walk_state->origin) {
237 if (out_op) {
238 *out_op = op;
239 }
240
241 return_ACPI_STATUS (AE_OK);
242 }
243
244 /*
245 * If the previous opcode was a conditional, this opcode
246 * must be the beginning of the associated predicate.
247 * Save this knowledge in the current scope descriptor
248 */
249 if ((walk_state->control_state) &&
250 (walk_state->control_state->common.state ==
251 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
252 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n",
253 op, walk_state));
254
255 walk_state->control_state->common.state = ACPI_CONTROL_PREDICATE_EXECUTING;
256
257 /* Save start of predicate */
258
259 walk_state->control_state->control.predicate_op = op;
260 }
261
262
263 opcode_class = walk_state->op_info->class;
264
265 /* We want to send namepaths to the load code */
266
267 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
268 opcode_class = AML_CLASS_NAMED_OBJECT;
269 }
270
271 /*
272 * Handle the opcode based upon the opcode type
273 */
274 switch (opcode_class) {
275 case AML_CLASS_CONTROL:
276
277 status = acpi_ds_result_stack_push (walk_state);
278 if (ACPI_FAILURE (status)) {
279 return_ACPI_STATUS (status);
280 }
281
282 status = acpi_ds_exec_begin_control_op (walk_state, op);
283 break;
284
285
286 case AML_CLASS_NAMED_OBJECT:
287
288 if (walk_state->walk_type == ACPI_WALK_METHOD) {
289 /*
290 * Found a named object declaration during method
291 * execution; we must enter this object into the
292 * namespace. The created object is temporary and
293 * will be deleted upon completion of the execution
294 * of this method.
295 */
296 status = acpi_ds_load2_begin_op (walk_state, NULL);
297 }
298
299 if (op->common.aml_opcode == AML_REGION_OP) {
300 status = acpi_ds_result_stack_push (walk_state);
301 }
302 break;
303
304
305 case AML_CLASS_EXECUTE:
306 case AML_CLASS_CREATE:
307
308 /* most operators with arguments */
309 /* Start a new result/operand state */
310
311 status = acpi_ds_result_stack_push (walk_state);
312 break;
313
314
315 default:
316 break;
317 }
318
319 /* Nothing to do here during method execution */
320
321 return_ACPI_STATUS (status);
322 }
323
324
325 /*****************************************************************************
326 *
327 * FUNCTION: acpi_ds_exec_end_op
328 *
329 * PARAMETERS: walk_state - Current state of the parse tree walk
330 * Op - Op that has been just been completed in the
331 * walk; Arguments have now been evaluated.
332 *
333 * RETURN: Status
334 *
335 * DESCRIPTION: Ascending callback used during the execution of control
336 * methods. The only thing we really need to do here is to
337 * notice the beginning of IF, ELSE, and WHILE blocks.
338 *
339 ****************************************************************************/
340
341 acpi_status
acpi_ds_exec_end_op(struct acpi_walk_state * walk_state)342 acpi_ds_exec_end_op (
343 struct acpi_walk_state *walk_state)
344 {
345 union acpi_parse_object *op;
346 acpi_status status = AE_OK;
347 u32 op_type;
348 u32 op_class;
349 union acpi_parse_object *next_op;
350 union acpi_parse_object *first_arg;
351
352
353 ACPI_FUNCTION_TRACE_PTR ("ds_exec_end_op", walk_state);
354
355
356 op = walk_state->op;
357 op_type = walk_state->op_info->type;
358 op_class = walk_state->op_info->class;
359
360 if (op_class == AML_CLASS_UNKNOWN) {
361 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown opcode %X\n", op->common.aml_opcode));
362 return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
363 }
364
365 first_arg = op->common.value.arg;
366
367 /* Init the walk state */
368
369 walk_state->num_operands = 0;
370 walk_state->return_desc = NULL;
371 walk_state->result_obj = NULL;
372
373 /* Call debugger for single step support (DEBUG build only) */
374
375 ACPI_DEBUGGER_EXEC (status = acpi_db_single_step (walk_state, op, op_class));
376 ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (status)) {return_ACPI_STATUS (status);});
377
378 /* Decode the Opcode Class */
379
380 switch (op_class) {
381 case AML_CLASS_ARGUMENT: /* constants, literals, etc. -- do nothing */
382 break;
383
384
385 case AML_CLASS_EXECUTE: /* most operators with arguments */
386
387 /* Build resolved operand stack */
388
389 status = acpi_ds_create_operands (walk_state, first_arg);
390 if (ACPI_FAILURE (status)) {
391 goto cleanup;
392 }
393
394 /* Done with this result state (Now that operand stack is built) */
395
396 status = acpi_ds_result_stack_pop (walk_state);
397 if (ACPI_FAILURE (status)) {
398 goto cleanup;
399 }
400
401 /* Resolve all operands */
402
403 status = acpi_ex_resolve_operands (walk_state->opcode,
404 &(walk_state->operands [walk_state->num_operands -1]),
405 walk_state);
406 if (ACPI_SUCCESS (status)) {
407 ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE,
408 acpi_ps_get_opcode_name (walk_state->opcode),
409 walk_state->num_operands, "after ex_resolve_operands");
410
411 /*
412 * Dispatch the request to the appropriate interpreter handler
413 * routine. There is one routine per opcode "type" based upon the
414 * number of opcode arguments and return type.
415 */
416 status = acpi_gbl_op_type_dispatch [op_type] (walk_state);
417 }
418 else {
419 /*
420 * Treat constructs of the form "Store(local_x,local_x)" as noops when the
421 * Local is uninitialized.
422 */
423 if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
424 (walk_state->opcode == AML_STORE_OP) &&
425 (walk_state->operands[0]->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&
426 (walk_state->operands[1]->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&
427 (walk_state->operands[0]->reference.opcode ==
428 walk_state->operands[1]->reference.opcode)) {
429 status = AE_OK;
430 }
431 else {
432 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
433 "[%s]: Could not resolve operands, %s\n",
434 acpi_ps_get_opcode_name (walk_state->opcode),
435 acpi_format_exception (status)));
436 }
437 }
438
439 /* Always delete the argument objects and clear the operand stack */
440
441 acpi_ds_clear_operands (walk_state);
442
443 /*
444 * If a result object was returned from above, push it on the
445 * current result stack
446 */
447 if (ACPI_SUCCESS (status) &&
448 walk_state->result_obj) {
449 status = acpi_ds_result_push (walk_state->result_obj, walk_state);
450 }
451
452 break;
453
454
455 default:
456
457 switch (op_type) {
458 case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
459
460 /* 1 Operand, 0 external_result, 0 internal_result */
461
462 status = acpi_ds_exec_end_control_op (walk_state, op);
463 if (ACPI_FAILURE (status)) {
464 break;
465 }
466
467 status = acpi_ds_result_stack_pop (walk_state);
468 break;
469
470
471 case AML_TYPE_METHOD_CALL:
472
473 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", op));
474
475 /*
476 * (AML_METHODCALL) Op->Value->Arg->Node contains
477 * the method Node pointer
478 */
479 /* next_op points to the op that holds the method name */
480
481 next_op = first_arg;
482
483 /* next_op points to first argument op */
484
485 next_op = next_op->common.next;
486
487 /*
488 * Get the method's arguments and put them on the operand stack
489 */
490 status = acpi_ds_create_operands (walk_state, next_op);
491 if (ACPI_FAILURE (status)) {
492 break;
493 }
494
495 /*
496 * Since the operands will be passed to another control method,
497 * we must resolve all local references here (Local variables,
498 * arguments to *this* method, etc.)
499 */
500 status = acpi_ds_resolve_operands (walk_state);
501 if (ACPI_FAILURE (status)) {
502 /* On error, clear all resolved operands */
503
504 acpi_ds_clear_operands (walk_state);
505 break;
506 }
507
508 /*
509 * Tell the walk loop to preempt this running method and
510 * execute the new method
511 */
512 status = AE_CTRL_TRANSFER;
513
514 /*
515 * Return now; we don't want to disturb anything,
516 * especially the operand count!
517 */
518 return_ACPI_STATUS (status);
519
520
521 case AML_TYPE_CREATE_FIELD:
522
523 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
524 "Executing create_field Buffer/Index Op=%p\n", op));
525
526 status = acpi_ds_load2_end_op (walk_state);
527 if (ACPI_FAILURE (status)) {
528 break;
529 }
530
531 status = acpi_ds_eval_buffer_field_operands (walk_state, op);
532 break;
533
534
535 case AML_TYPE_CREATE_OBJECT:
536
537 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
538 "Executing create_object (Buffer/Package) Op=%p\n", op));
539
540 switch (op->common.parent->common.aml_opcode) {
541 case AML_NAME_OP:
542
543 /*
544 * Put the Node on the object stack (Contains the ACPI Name of
545 * this object)
546 */
547 walk_state->operands[0] = (void *) op->common.parent->common.node;
548 walk_state->num_operands = 1;
549
550 status = acpi_ds_create_node (walk_state, op->common.parent->common.node, op->common.parent);
551 if (ACPI_FAILURE (status)) {
552 break;
553 }
554
555 /* Fall through */
556 /*lint -fallthrough */
557
558 case AML_INT_EVAL_SUBTREE_OP:
559
560 status = acpi_ds_eval_data_object_operands (walk_state, op,
561 acpi_ns_get_attached_object (op->common.parent->common.node));
562 break;
563
564 default:
565
566 status = acpi_ds_eval_data_object_operands (walk_state, op, NULL);
567 break;
568 }
569
570 /*
571 * If a result object was returned from above, push it on the
572 * current result stack
573 */
574 if (ACPI_SUCCESS (status) &&
575 walk_state->result_obj) {
576 status = acpi_ds_result_push (walk_state->result_obj, walk_state);
577 }
578 break;
579
580
581 case AML_TYPE_NAMED_FIELD:
582 case AML_TYPE_NAMED_COMPLEX:
583 case AML_TYPE_NAMED_SIMPLE:
584 case AML_TYPE_NAMED_NO_OBJ:
585
586 status = acpi_ds_load2_end_op (walk_state);
587 if (ACPI_FAILURE (status)) {
588 break;
589 }
590
591 if (op->common.aml_opcode == AML_REGION_OP) {
592 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
593 "Executing op_region Address/Length Op=%p\n", op));
594
595 status = acpi_ds_eval_region_operands (walk_state, op);
596 if (ACPI_FAILURE (status)) {
597 break;
598 }
599
600 status = acpi_ds_result_stack_pop (walk_state);
601 }
602
603 break;
604
605
606 case AML_TYPE_UNDEFINED:
607
608 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Undefined opcode type Op=%p\n", op));
609 return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
610
611
612 case AML_TYPE_BOGUS:
613
614 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
615 "Internal opcode=%X type Op=%p\n",
616 walk_state->opcode, op));
617 break;
618
619
620 default:
621
622 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
623 "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p\n",
624 op_class, op_type, op->common.aml_opcode, op));
625
626 status = AE_NOT_IMPLEMENTED;
627 break;
628 }
629 }
630
631 /*
632 * ACPI 2.0 support for 64-bit integers: Truncate numeric
633 * result value if we are executing from a 32-bit ACPI table
634 */
635 acpi_ex_truncate_for32bit_table (walk_state->result_obj);
636
637 /*
638 * Check if we just completed the evaluation of a
639 * conditional predicate
640 */
641
642 if ((walk_state->control_state) &&
643 (walk_state->control_state->common.state ==
644 ACPI_CONTROL_PREDICATE_EXECUTING) &&
645 (walk_state->control_state->control.predicate_op == op)) {
646 status = acpi_ds_get_predicate_value (walk_state, walk_state->result_obj);
647 walk_state->result_obj = NULL;
648 }
649
650
651 cleanup:
652 if (walk_state->result_obj) {
653 /* Break to debugger to display result */
654
655 ACPI_DEBUGGER_EXEC (acpi_db_display_result_object (walk_state->result_obj, walk_state));
656
657 /*
658 * Delete the result op if and only if:
659 * Parent will not use the result -- such as any
660 * non-nested type2 op in a method (parent will be method)
661 */
662 acpi_ds_delete_result_if_not_used (op, walk_state->result_obj, walk_state);
663 }
664
665 #ifdef _UNDER_DEVELOPMENT
666
667 if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
668 acpi_db_method_end (walk_state);
669 }
670 #endif
671
672 /* Always clear the object stack */
673
674 walk_state->num_operands = 0;
675
676 #ifdef ACPI_DISASSEMBLER
677
678 /* On error, display method locals/args */
679
680 if (ACPI_FAILURE (status)) {
681 acpi_dm_dump_method_info (status, walk_state, op);
682 }
683 #endif
684
685 return_ACPI_STATUS (status);
686 }
687
688
689