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1 | /****************************************************************************** | |
2 | * | |
3 | * Module Name: psobject - Support for parse objects | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2017, Intel Corp. | |
9 | * All rights reserved. | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #include <acpi/acpi.h> | |
45 | #include "accommon.h" | |
46 | #include "acparser.h" | |
47 | #include "amlcode.h" | |
48 | ||
49 | #define _COMPONENT ACPI_PARSER | |
50 | ACPI_MODULE_NAME("psobject") | |
51 | ||
52 | /* Local prototypes */ | |
53 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state); | |
54 | ||
55 | /******************************************************************************* | |
56 | * | |
57 | * FUNCTION: acpi_ps_get_aml_opcode | |
58 | * | |
59 | * PARAMETERS: walk_state - Current state | |
60 | * | |
61 | * RETURN: Status | |
62 | * | |
63 | * DESCRIPTION: Extract the next AML opcode from the input stream. | |
64 | * | |
65 | ******************************************************************************/ | |
66 | ||
67 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state) | |
68 | { | |
69 | u32 aml_offset; | |
70 | ||
71 | ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state); | |
72 | ||
73 | walk_state->aml = walk_state->parser_state.aml; | |
74 | walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state)); | |
75 | ||
76 | /* | |
77 | * First cut to determine what we have found: | |
78 | * 1) A valid AML opcode | |
79 | * 2) A name string | |
80 | * 3) An unknown/invalid opcode | |
81 | */ | |
82 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); | |
83 | ||
84 | switch (walk_state->op_info->class) { | |
85 | case AML_CLASS_ASCII: | |
86 | case AML_CLASS_PREFIX: | |
87 | /* | |
88 | * Starts with a valid prefix or ASCII char, this is a name | |
89 | * string. Convert the bare name string to a namepath. | |
90 | */ | |
91 | walk_state->opcode = AML_INT_NAMEPATH_OP; | |
92 | walk_state->arg_types = ARGP_NAMESTRING; | |
93 | break; | |
94 | ||
95 | case AML_CLASS_UNKNOWN: | |
96 | ||
97 | /* The opcode is unrecognized. Complain and skip unknown opcodes */ | |
98 | ||
99 | if (walk_state->pass_number == 2) { | |
100 | aml_offset = (u32)ACPI_PTR_DIFF(walk_state->aml, | |
101 | walk_state-> | |
102 | parser_state.aml_start); | |
103 | ||
104 | ACPI_ERROR((AE_INFO, | |
105 | "Unknown opcode 0x%.2X at table offset 0x%.4X, ignoring", | |
106 | walk_state->opcode, | |
107 | (u32)(aml_offset + | |
108 | sizeof(struct acpi_table_header)))); | |
109 | ||
110 | ACPI_DUMP_BUFFER((walk_state->parser_state.aml - 16), | |
111 | 48); | |
112 | ||
113 | #ifdef ACPI_ASL_COMPILER | |
114 | /* | |
115 | * This is executed for the disassembler only. Output goes | |
116 | * to the disassembled ASL output file. | |
117 | */ | |
118 | acpi_os_printf | |
119 | ("/*\nError: Unknown opcode 0x%.2X at table offset 0x%.4X, context:\n", | |
120 | walk_state->opcode, | |
121 | (u32)(aml_offset + | |
122 | sizeof(struct acpi_table_header))); | |
123 | ||
124 | /* Dump the context surrounding the invalid opcode */ | |
125 | ||
126 | acpi_ut_dump_buffer(((u8 *)walk_state->parser_state. | |
127 | aml - 16), 48, DB_BYTE_DISPLAY, | |
128 | (aml_offset + | |
129 | sizeof(struct acpi_table_header) - | |
130 | 16)); | |
131 | acpi_os_printf(" */\n"); | |
132 | #endif | |
133 | } | |
134 | ||
135 | /* Increment past one-byte or two-byte opcode */ | |
136 | ||
137 | walk_state->parser_state.aml++; | |
138 | if (walk_state->opcode > 0xFF) { /* Can only happen if first byte is 0x5B */ | |
139 | walk_state->parser_state.aml++; | |
140 | } | |
141 | ||
142 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); | |
143 | ||
144 | default: | |
145 | ||
146 | /* Found opcode info, this is a normal opcode */ | |
147 | ||
148 | walk_state->parser_state.aml += | |
149 | acpi_ps_get_opcode_size(walk_state->opcode); | |
150 | walk_state->arg_types = walk_state->op_info->parse_args; | |
151 | break; | |
152 | } | |
153 | ||
154 | return_ACPI_STATUS(AE_OK); | |
155 | } | |
156 | ||
157 | /******************************************************************************* | |
158 | * | |
159 | * FUNCTION: acpi_ps_build_named_op | |
160 | * | |
161 | * PARAMETERS: walk_state - Current state | |
162 | * aml_op_start - Begin of named Op in AML | |
163 | * unnamed_op - Early Op (not a named Op) | |
164 | * op - Returned Op | |
165 | * | |
166 | * RETURN: Status | |
167 | * | |
168 | * DESCRIPTION: Parse a named Op | |
169 | * | |
170 | ******************************************************************************/ | |
171 | ||
172 | acpi_status | |
173 | acpi_ps_build_named_op(struct acpi_walk_state *walk_state, | |
174 | u8 *aml_op_start, | |
175 | union acpi_parse_object *unnamed_op, | |
176 | union acpi_parse_object **op) | |
177 | { | |
178 | acpi_status status = AE_OK; | |
179 | union acpi_parse_object *arg = NULL; | |
180 | ||
181 | ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_state); | |
182 | ||
183 | unnamed_op->common.value.arg = NULL; | |
184 | unnamed_op->common.arg_list_length = 0; | |
185 | unnamed_op->common.aml_opcode = walk_state->opcode; | |
186 | ||
187 | /* | |
188 | * Get and append arguments until we find the node that contains | |
189 | * the name (the type ARGP_NAME). | |
190 | */ | |
191 | while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) && | |
192 | (GET_CURRENT_ARG_TYPE(walk_state->arg_types) != ARGP_NAME)) { | |
193 | status = | |
194 | acpi_ps_get_next_arg(walk_state, | |
195 | &(walk_state->parser_state), | |
196 | GET_CURRENT_ARG_TYPE(walk_state-> | |
197 | arg_types), &arg); | |
198 | if (ACPI_FAILURE(status)) { | |
199 | return_ACPI_STATUS(status); | |
200 | } | |
201 | ||
202 | acpi_ps_append_arg(unnamed_op, arg); | |
203 | INCREMENT_ARG_LIST(walk_state->arg_types); | |
204 | } | |
205 | ||
206 | /* | |
207 | * Make sure that we found a NAME and didn't run out of arguments | |
208 | */ | |
209 | if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) { | |
210 | return_ACPI_STATUS(AE_AML_NO_OPERAND); | |
211 | } | |
212 | ||
213 | /* We know that this arg is a name, move to next arg */ | |
214 | ||
215 | INCREMENT_ARG_LIST(walk_state->arg_types); | |
216 | ||
217 | /* | |
218 | * Find the object. This will either insert the object into | |
219 | * the namespace or simply look it up | |
220 | */ | |
221 | walk_state->op = NULL; | |
222 | ||
223 | status = walk_state->descending_callback(walk_state, op); | |
224 | if (ACPI_FAILURE(status)) { | |
225 | if (status != AE_CTRL_TERMINATE) { | |
226 | ACPI_EXCEPTION((AE_INFO, status, | |
227 | "During name lookup/catalog")); | |
228 | } | |
229 | return_ACPI_STATUS(status); | |
230 | } | |
231 | ||
232 | if (!*op) { | |
233 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); | |
234 | } | |
235 | ||
236 | status = acpi_ps_next_parse_state(walk_state, *op, status); | |
237 | if (ACPI_FAILURE(status)) { | |
238 | if (status == AE_CTRL_PENDING) { | |
239 | status = AE_CTRL_PARSE_PENDING; | |
240 | } | |
241 | return_ACPI_STATUS(status); | |
242 | } | |
243 | ||
244 | acpi_ps_append_arg(*op, unnamed_op->common.value.arg); | |
245 | ||
246 | if ((*op)->common.aml_opcode == AML_REGION_OP || | |
247 | (*op)->common.aml_opcode == AML_DATA_REGION_OP) { | |
248 | /* | |
249 | * Defer final parsing of an operation_region body, because we don't | |
250 | * have enough info in the first pass to parse it correctly (i.e., | |
251 | * there may be method calls within the term_arg elements of the body.) | |
252 | * | |
253 | * However, we must continue parsing because the opregion is not a | |
254 | * standalone package -- we don't know where the end is at this point. | |
255 | * | |
256 | * (Length is unknown until parse of the body complete) | |
257 | */ | |
258 | (*op)->named.data = aml_op_start; | |
259 | (*op)->named.length = 0; | |
260 | } | |
261 | ||
262 | return_ACPI_STATUS(AE_OK); | |
263 | } | |
264 | ||
265 | /******************************************************************************* | |
266 | * | |
267 | * FUNCTION: acpi_ps_create_op | |
268 | * | |
269 | * PARAMETERS: walk_state - Current state | |
270 | * aml_op_start - Op start in AML | |
271 | * new_op - Returned Op | |
272 | * | |
273 | * RETURN: Status | |
274 | * | |
275 | * DESCRIPTION: Get Op from AML | |
276 | * | |
277 | ******************************************************************************/ | |
278 | ||
279 | acpi_status | |
280 | acpi_ps_create_op(struct acpi_walk_state *walk_state, | |
281 | u8 *aml_op_start, union acpi_parse_object **new_op) | |
282 | { | |
283 | acpi_status status = AE_OK; | |
284 | union acpi_parse_object *op; | |
285 | union acpi_parse_object *named_op = NULL; | |
286 | union acpi_parse_object *parent_scope; | |
287 | u8 argument_count; | |
288 | const struct acpi_opcode_info *op_info; | |
289 | ||
290 | ACPI_FUNCTION_TRACE_PTR(ps_create_op, walk_state); | |
291 | ||
292 | status = acpi_ps_get_aml_opcode(walk_state); | |
293 | if (status == AE_CTRL_PARSE_CONTINUE) { | |
294 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); | |
295 | } | |
296 | ||
297 | /* Create Op structure and append to parent's argument list */ | |
298 | ||
299 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); | |
300 | op = acpi_ps_alloc_op(walk_state->opcode, aml_op_start); | |
301 | if (!op) { | |
302 | return_ACPI_STATUS(AE_NO_MEMORY); | |
303 | } | |
304 | ||
305 | if (walk_state->op_info->flags & AML_NAMED) { | |
306 | status = | |
307 | acpi_ps_build_named_op(walk_state, aml_op_start, op, | |
308 | &named_op); | |
309 | acpi_ps_free_op(op); | |
310 | if (ACPI_FAILURE(status)) { | |
311 | return_ACPI_STATUS(status); | |
312 | } | |
313 | ||
314 | *new_op = named_op; | |
315 | return_ACPI_STATUS(AE_OK); | |
316 | } | |
317 | ||
318 | /* Not a named opcode, just allocate Op and append to parent */ | |
319 | ||
320 | if (walk_state->op_info->flags & AML_CREATE) { | |
321 | /* | |
322 | * Backup to beginning of create_XXXfield declaration | |
323 | * body_length is unknown until we parse the body | |
324 | */ | |
325 | op->named.data = aml_op_start; | |
326 | op->named.length = 0; | |
327 | } | |
328 | ||
329 | if (walk_state->opcode == AML_BANK_FIELD_OP) { | |
330 | /* | |
331 | * Backup to beginning of bank_field declaration | |
332 | * body_length is unknown until we parse the body | |
333 | */ | |
334 | op->named.data = aml_op_start; | |
335 | op->named.length = 0; | |
336 | } | |
337 | ||
338 | parent_scope = acpi_ps_get_parent_scope(&(walk_state->parser_state)); | |
339 | acpi_ps_append_arg(parent_scope, op); | |
340 | ||
341 | if (parent_scope) { | |
342 | op_info = | |
343 | acpi_ps_get_opcode_info(parent_scope->common.aml_opcode); | |
344 | if (op_info->flags & AML_HAS_TARGET) { | |
345 | argument_count = | |
346 | acpi_ps_get_argument_count(op_info->type); | |
347 | if (parent_scope->common.arg_list_length > | |
348 | argument_count) { | |
349 | op->common.flags |= ACPI_PARSEOP_TARGET; | |
350 | } | |
351 | } | |
352 | ||
353 | /* | |
354 | * Special case for both Increment() and Decrement(), where | |
355 | * the lone argument is both a source and a target. | |
356 | */ | |
357 | else if ((parent_scope->common.aml_opcode == AML_INCREMENT_OP) | |
358 | || (parent_scope->common.aml_opcode == | |
359 | AML_DECREMENT_OP)) { | |
360 | op->common.flags |= ACPI_PARSEOP_TARGET; | |
361 | } | |
362 | } | |
363 | ||
364 | if (walk_state->descending_callback != NULL) { | |
365 | /* | |
366 | * Find the object. This will either insert the object into | |
367 | * the namespace or simply look it up | |
368 | */ | |
369 | walk_state->op = *new_op = op; | |
370 | ||
371 | status = walk_state->descending_callback(walk_state, &op); | |
372 | status = acpi_ps_next_parse_state(walk_state, op, status); | |
373 | if (status == AE_CTRL_PENDING) { | |
374 | status = AE_CTRL_PARSE_PENDING; | |
375 | } | |
376 | } | |
377 | ||
378 | return_ACPI_STATUS(status); | |
379 | } | |
380 | ||
381 | /******************************************************************************* | |
382 | * | |
383 | * FUNCTION: acpi_ps_complete_op | |
384 | * | |
385 | * PARAMETERS: walk_state - Current state | |
386 | * op - Returned Op | |
387 | * status - Parse status before complete Op | |
388 | * | |
389 | * RETURN: Status | |
390 | * | |
391 | * DESCRIPTION: Complete Op | |
392 | * | |
393 | ******************************************************************************/ | |
394 | ||
395 | acpi_status | |
396 | acpi_ps_complete_op(struct acpi_walk_state *walk_state, | |
397 | union acpi_parse_object **op, acpi_status status) | |
398 | { | |
399 | acpi_status status2; | |
400 | ||
401 | ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state); | |
402 | ||
403 | /* | |
404 | * Finished one argument of the containing scope | |
405 | */ | |
406 | walk_state->parser_state.scope->parse_scope.arg_count--; | |
407 | ||
408 | /* Close this Op (will result in parse subtree deletion) */ | |
409 | ||
410 | status2 = acpi_ps_complete_this_op(walk_state, *op); | |
411 | if (ACPI_FAILURE(status2)) { | |
412 | return_ACPI_STATUS(status2); | |
413 | } | |
414 | ||
415 | *op = NULL; | |
416 | ||
417 | switch (status) { | |
418 | case AE_OK: | |
419 | ||
420 | break; | |
421 | ||
422 | case AE_CTRL_TRANSFER: | |
423 | ||
424 | /* We are about to transfer to a called method */ | |
425 | ||
426 | walk_state->prev_op = NULL; | |
427 | walk_state->prev_arg_types = walk_state->arg_types; | |
428 | return_ACPI_STATUS(status); | |
429 | ||
430 | case AE_CTRL_END: | |
431 | ||
432 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
433 | &walk_state->arg_types, | |
434 | &walk_state->arg_count); | |
435 | ||
436 | if (*op) { | |
437 | walk_state->op = *op; | |
438 | walk_state->op_info = | |
439 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); | |
440 | walk_state->opcode = (*op)->common.aml_opcode; | |
441 | ||
442 | status = walk_state->ascending_callback(walk_state); | |
443 | status = | |
444 | acpi_ps_next_parse_state(walk_state, *op, status); | |
445 | ||
446 | status2 = acpi_ps_complete_this_op(walk_state, *op); | |
447 | if (ACPI_FAILURE(status2)) { | |
448 | return_ACPI_STATUS(status2); | |
449 | } | |
450 | } | |
451 | ||
452 | status = AE_OK; | |
453 | break; | |
454 | ||
455 | case AE_CTRL_BREAK: | |
456 | case AE_CTRL_CONTINUE: | |
457 | ||
458 | /* Pop off scopes until we find the While */ | |
459 | ||
460 | while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) { | |
461 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
462 | &walk_state->arg_types, | |
463 | &walk_state->arg_count); | |
464 | } | |
465 | ||
466 | /* Close this iteration of the While loop */ | |
467 | ||
468 | walk_state->op = *op; | |
469 | walk_state->op_info = | |
470 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); | |
471 | walk_state->opcode = (*op)->common.aml_opcode; | |
472 | ||
473 | status = walk_state->ascending_callback(walk_state); | |
474 | status = acpi_ps_next_parse_state(walk_state, *op, status); | |
475 | ||
476 | status2 = acpi_ps_complete_this_op(walk_state, *op); | |
477 | if (ACPI_FAILURE(status2)) { | |
478 | return_ACPI_STATUS(status2); | |
479 | } | |
480 | ||
481 | status = AE_OK; | |
482 | break; | |
483 | ||
484 | case AE_CTRL_TERMINATE: | |
485 | ||
486 | /* Clean up */ | |
487 | do { | |
488 | if (*op) { | |
489 | status2 = | |
490 | acpi_ps_complete_this_op(walk_state, *op); | |
491 | if (ACPI_FAILURE(status2)) { | |
492 | return_ACPI_STATUS(status2); | |
493 | } | |
494 | ||
495 | acpi_ut_delete_generic_state | |
496 | (acpi_ut_pop_generic_state | |
497 | (&walk_state->control_state)); | |
498 | } | |
499 | ||
500 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
501 | &walk_state->arg_types, | |
502 | &walk_state->arg_count); | |
503 | ||
504 | } while (*op); | |
505 | ||
506 | return_ACPI_STATUS(AE_OK); | |
507 | ||
508 | default: /* All other non-AE_OK status */ | |
509 | ||
510 | do { | |
511 | if (*op) { | |
512 | status2 = | |
513 | acpi_ps_complete_this_op(walk_state, *op); | |
514 | if (ACPI_FAILURE(status2)) { | |
515 | return_ACPI_STATUS(status2); | |
516 | } | |
517 | } | |
518 | ||
519 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
520 | &walk_state->arg_types, | |
521 | &walk_state->arg_count); | |
522 | ||
523 | } while (*op); | |
524 | ||
525 | #if 0 | |
526 | /* | |
527 | * TBD: Cleanup parse ops on error | |
528 | */ | |
529 | if (*op == NULL) { | |
530 | acpi_ps_pop_scope(parser_state, op, | |
531 | &walk_state->arg_types, | |
532 | &walk_state->arg_count); | |
533 | } | |
534 | #endif | |
535 | walk_state->prev_op = NULL; | |
536 | walk_state->prev_arg_types = walk_state->arg_types; | |
537 | return_ACPI_STATUS(status); | |
538 | } | |
539 | ||
540 | /* This scope complete? */ | |
541 | ||
542 | if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) { | |
543 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
544 | &walk_state->arg_types, | |
545 | &walk_state->arg_count); | |
546 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *op)); | |
547 | } else { | |
548 | *op = NULL; | |
549 | } | |
550 | ||
551 | return_ACPI_STATUS(AE_OK); | |
552 | } | |
553 | ||
554 | /******************************************************************************* | |
555 | * | |
556 | * FUNCTION: acpi_ps_complete_final_op | |
557 | * | |
558 | * PARAMETERS: walk_state - Current state | |
559 | * op - Current Op | |
560 | * status - Current parse status before complete last | |
561 | * Op | |
562 | * | |
563 | * RETURN: Status | |
564 | * | |
565 | * DESCRIPTION: Complete last Op. | |
566 | * | |
567 | ******************************************************************************/ | |
568 | ||
569 | acpi_status | |
570 | acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, | |
571 | union acpi_parse_object *op, acpi_status status) | |
572 | { | |
573 | acpi_status status2; | |
574 | ||
575 | ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state); | |
576 | ||
577 | /* | |
578 | * Complete the last Op (if not completed), and clear the scope stack. | |
579 | * It is easily possible to end an AML "package" with an unbounded number | |
580 | * of open scopes (such as when several ASL blocks are closed with | |
581 | * sequential closing braces). We want to terminate each one cleanly. | |
582 | */ | |
583 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", | |
584 | op)); | |
585 | do { | |
586 | if (op) { | |
587 | if (walk_state->ascending_callback != NULL) { | |
588 | walk_state->op = op; | |
589 | walk_state->op_info = | |
590 | acpi_ps_get_opcode_info(op->common. | |
591 | aml_opcode); | |
592 | walk_state->opcode = op->common.aml_opcode; | |
593 | ||
594 | status = | |
595 | walk_state->ascending_callback(walk_state); | |
596 | status = | |
597 | acpi_ps_next_parse_state(walk_state, op, | |
598 | status); | |
599 | if (status == AE_CTRL_PENDING) { | |
600 | status = | |
601 | acpi_ps_complete_op(walk_state, &op, | |
602 | AE_OK); | |
603 | if (ACPI_FAILURE(status)) { | |
604 | return_ACPI_STATUS(status); | |
605 | } | |
606 | } | |
607 | ||
608 | if (status == AE_CTRL_TERMINATE) { | |
609 | status = AE_OK; | |
610 | ||
611 | /* Clean up */ | |
612 | do { | |
613 | if (op) { | |
614 | status2 = | |
615 | acpi_ps_complete_this_op | |
616 | (walk_state, op); | |
617 | if (ACPI_FAILURE | |
618 | (status2)) { | |
619 | return_ACPI_STATUS | |
620 | (status2); | |
621 | } | |
622 | } | |
623 | ||
624 | acpi_ps_pop_scope(& | |
625 | (walk_state-> | |
626 | parser_state), | |
627 | &op, | |
628 | &walk_state-> | |
629 | arg_types, | |
630 | &walk_state-> | |
631 | arg_count); | |
632 | ||
633 | } while (op); | |
634 | ||
635 | return_ACPI_STATUS(status); | |
636 | } | |
637 | ||
638 | else if (ACPI_FAILURE(status)) { | |
639 | ||
640 | /* First error is most important */ | |
641 | ||
642 | (void) | |
643 | acpi_ps_complete_this_op(walk_state, | |
644 | op); | |
645 | return_ACPI_STATUS(status); | |
646 | } | |
647 | } | |
648 | ||
649 | status2 = acpi_ps_complete_this_op(walk_state, op); | |
650 | if (ACPI_FAILURE(status2)) { | |
651 | return_ACPI_STATUS(status2); | |
652 | } | |
653 | } | |
654 | ||
655 | acpi_ps_pop_scope(&(walk_state->parser_state), &op, | |
656 | &walk_state->arg_types, | |
657 | &walk_state->arg_count); | |
658 | ||
659 | } while (op); | |
660 | ||
661 | return_ACPI_STATUS(status); | |
662 | } |