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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 | #include "acconvert.h" | |
49 | ||
50 | #define _COMPONENT ACPI_PARSER | |
51 | ACPI_MODULE_NAME("psobject") | |
52 | ||
53 | /* Local prototypes */ | |
54 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state); | |
55 | ||
56 | /******************************************************************************* | |
57 | * | |
58 | * FUNCTION: acpi_ps_get_aml_opcode | |
59 | * | |
60 | * PARAMETERS: walk_state - Current state | |
61 | * | |
62 | * RETURN: Status | |
63 | * | |
64 | * DESCRIPTION: Extract the next AML opcode from the input stream. | |
65 | * | |
66 | ******************************************************************************/ | |
67 | ||
68 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state) | |
69 | { | |
70 | u32 aml_offset; | |
71 | ||
72 | ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state); | |
73 | ||
74 | walk_state->aml = walk_state->parser_state.aml; | |
75 | walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state)); | |
76 | ||
77 | /* | |
78 | * First cut to determine what we have found: | |
79 | * 1) A valid AML opcode | |
80 | * 2) A name string | |
81 | * 3) An unknown/invalid opcode | |
82 | */ | |
83 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); | |
84 | ||
85 | switch (walk_state->op_info->class) { | |
86 | case AML_CLASS_ASCII: | |
87 | case AML_CLASS_PREFIX: | |
88 | /* | |
89 | * Starts with a valid prefix or ASCII char, this is a name | |
90 | * string. Convert the bare name string to a namepath. | |
91 | */ | |
92 | walk_state->opcode = AML_INT_NAMEPATH_OP; | |
93 | walk_state->arg_types = ARGP_NAMESTRING; | |
94 | break; | |
95 | ||
96 | case AML_CLASS_UNKNOWN: | |
97 | ||
98 | /* The opcode is unrecognized. Complain and skip unknown opcodes */ | |
99 | ||
100 | if (walk_state->pass_number == 2) { | |
101 | aml_offset = (u32)ACPI_PTR_DIFF(walk_state->aml, | |
102 | walk_state-> | |
103 | parser_state.aml_start); | |
104 | ||
105 | ACPI_ERROR((AE_INFO, | |
106 | "Unknown opcode 0x%.2X at table offset 0x%.4X, ignoring", | |
107 | walk_state->opcode, | |
108 | (u32)(aml_offset + | |
109 | sizeof(struct acpi_table_header)))); | |
110 | ||
111 | ACPI_DUMP_BUFFER((walk_state->parser_state.aml - 16), | |
112 | 48); | |
113 | ||
114 | #ifdef ACPI_ASL_COMPILER | |
115 | /* | |
116 | * This is executed for the disassembler only. Output goes | |
117 | * to the disassembled ASL output file. | |
118 | */ | |
119 | acpi_os_printf | |
120 | ("/*\nError: Unknown opcode 0x%.2X at table offset 0x%.4X, context:\n", | |
121 | walk_state->opcode, | |
122 | (u32)(aml_offset + | |
123 | sizeof(struct acpi_table_header))); | |
124 | ||
125 | ACPI_ERROR((AE_INFO, | |
126 | "Aborting disassembly, AML byte code is corrupt")); | |
127 | ||
128 | /* Dump the context surrounding the invalid opcode */ | |
129 | ||
130 | acpi_ut_dump_buffer(((u8 *)walk_state->parser_state. | |
131 | aml - 16), 48, DB_BYTE_DISPLAY, | |
132 | (aml_offset + | |
133 | sizeof(struct acpi_table_header) - | |
134 | 16)); | |
135 | acpi_os_printf(" */\n"); | |
136 | ||
137 | /* | |
138 | * Just abort the disassembly, cannot continue because the | |
139 | * parser is essentially lost. The disassembler can then | |
140 | * randomly fail because an ill-constructed parse tree | |
141 | * can result. | |
142 | */ | |
143 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); | |
144 | #endif | |
145 | } | |
146 | ||
147 | /* Increment past one-byte or two-byte opcode */ | |
148 | ||
149 | walk_state->parser_state.aml++; | |
150 | if (walk_state->opcode > 0xFF) { /* Can only happen if first byte is 0x5B */ | |
151 | walk_state->parser_state.aml++; | |
152 | } | |
153 | ||
154 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); | |
155 | ||
156 | default: | |
157 | ||
158 | /* Found opcode info, this is a normal opcode */ | |
159 | ||
160 | walk_state->parser_state.aml += | |
161 | acpi_ps_get_opcode_size(walk_state->opcode); | |
162 | walk_state->arg_types = walk_state->op_info->parse_args; | |
163 | break; | |
164 | } | |
165 | ||
166 | return_ACPI_STATUS(AE_OK); | |
167 | } | |
168 | ||
169 | /******************************************************************************* | |
170 | * | |
171 | * FUNCTION: acpi_ps_build_named_op | |
172 | * | |
173 | * PARAMETERS: walk_state - Current state | |
174 | * aml_op_start - Begin of named Op in AML | |
175 | * unnamed_op - Early Op (not a named Op) | |
176 | * op - Returned Op | |
177 | * | |
178 | * RETURN: Status | |
179 | * | |
180 | * DESCRIPTION: Parse a named Op | |
181 | * | |
182 | ******************************************************************************/ | |
183 | ||
184 | acpi_status | |
185 | acpi_ps_build_named_op(struct acpi_walk_state *walk_state, | |
186 | u8 *aml_op_start, | |
187 | union acpi_parse_object *unnamed_op, | |
188 | union acpi_parse_object **op) | |
189 | { | |
190 | acpi_status status = AE_OK; | |
191 | union acpi_parse_object *arg = NULL; | |
192 | ||
193 | ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_state); | |
194 | ||
195 | unnamed_op->common.value.arg = NULL; | |
196 | unnamed_op->common.arg_list_length = 0; | |
197 | unnamed_op->common.aml_opcode = walk_state->opcode; | |
198 | ||
199 | /* | |
200 | * Get and append arguments until we find the node that contains | |
201 | * the name (the type ARGP_NAME). | |
202 | */ | |
203 | while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) && | |
204 | (GET_CURRENT_ARG_TYPE(walk_state->arg_types) != ARGP_NAME)) { | |
205 | ASL_CV_CAPTURE_COMMENTS(walk_state); | |
206 | status = | |
207 | acpi_ps_get_next_arg(walk_state, | |
208 | &(walk_state->parser_state), | |
209 | GET_CURRENT_ARG_TYPE(walk_state-> | |
210 | arg_types), &arg); | |
211 | if (ACPI_FAILURE(status)) { | |
212 | return_ACPI_STATUS(status); | |
213 | } | |
214 | ||
215 | acpi_ps_append_arg(unnamed_op, arg); | |
216 | INCREMENT_ARG_LIST(walk_state->arg_types); | |
217 | } | |
218 | ||
219 | /* are there any inline comments associated with the name_seg?? If so, save this. */ | |
220 | ||
221 | ASL_CV_CAPTURE_COMMENTS(walk_state); | |
222 | ||
223 | #ifdef ACPI_ASL_COMPILER | |
224 | if (acpi_gbl_current_inline_comment != NULL) { | |
225 | unnamed_op->common.name_comment = | |
226 | acpi_gbl_current_inline_comment; | |
227 | acpi_gbl_current_inline_comment = NULL; | |
228 | } | |
229 | #endif | |
230 | ||
231 | /* | |
232 | * Make sure that we found a NAME and didn't run out of arguments | |
233 | */ | |
234 | if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) { | |
235 | return_ACPI_STATUS(AE_AML_NO_OPERAND); | |
236 | } | |
237 | ||
238 | /* We know that this arg is a name, move to next arg */ | |
239 | ||
240 | INCREMENT_ARG_LIST(walk_state->arg_types); | |
241 | ||
242 | /* | |
243 | * Find the object. This will either insert the object into | |
244 | * the namespace or simply look it up | |
245 | */ | |
246 | walk_state->op = NULL; | |
247 | ||
248 | status = walk_state->descending_callback(walk_state, op); | |
249 | if (ACPI_FAILURE(status)) { | |
250 | if (status != AE_CTRL_TERMINATE) { | |
251 | ACPI_EXCEPTION((AE_INFO, status, | |
252 | "During name lookup/catalog")); | |
253 | } | |
254 | return_ACPI_STATUS(status); | |
255 | } | |
256 | ||
257 | if (!*op) { | |
258 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); | |
259 | } | |
260 | ||
261 | status = acpi_ps_next_parse_state(walk_state, *op, status); | |
262 | if (ACPI_FAILURE(status)) { | |
263 | if (status == AE_CTRL_PENDING) { | |
264 | status = AE_CTRL_PARSE_PENDING; | |
265 | } | |
266 | return_ACPI_STATUS(status); | |
267 | } | |
268 | ||
269 | acpi_ps_append_arg(*op, unnamed_op->common.value.arg); | |
270 | ||
271 | #ifdef ACPI_ASL_COMPILER | |
272 | ||
273 | /* save any comments that might be associated with unnamed_op. */ | |
274 | ||
275 | (*op)->common.inline_comment = unnamed_op->common.inline_comment; | |
276 | (*op)->common.end_node_comment = unnamed_op->common.end_node_comment; | |
277 | (*op)->common.close_brace_comment = | |
278 | unnamed_op->common.close_brace_comment; | |
279 | (*op)->common.name_comment = unnamed_op->common.name_comment; | |
280 | (*op)->common.comment_list = unnamed_op->common.comment_list; | |
281 | (*op)->common.end_blk_comment = unnamed_op->common.end_blk_comment; | |
282 | (*op)->common.cv_filename = unnamed_op->common.cv_filename; | |
283 | (*op)->common.cv_parent_filename = | |
284 | unnamed_op->common.cv_parent_filename; | |
285 | (*op)->named.aml = unnamed_op->common.aml; | |
286 | ||
287 | unnamed_op->common.inline_comment = NULL; | |
288 | unnamed_op->common.end_node_comment = NULL; | |
289 | unnamed_op->common.close_brace_comment = NULL; | |
290 | unnamed_op->common.name_comment = NULL; | |
291 | unnamed_op->common.comment_list = NULL; | |
292 | unnamed_op->common.end_blk_comment = NULL; | |
293 | #endif | |
294 | ||
295 | if ((*op)->common.aml_opcode == AML_REGION_OP || | |
296 | (*op)->common.aml_opcode == AML_DATA_REGION_OP) { | |
297 | /* | |
298 | * Defer final parsing of an operation_region body, because we don't | |
299 | * have enough info in the first pass to parse it correctly (i.e., | |
300 | * there may be method calls within the term_arg elements of the body.) | |
301 | * | |
302 | * However, we must continue parsing because the opregion is not a | |
303 | * standalone package -- we don't know where the end is at this point. | |
304 | * | |
305 | * (Length is unknown until parse of the body complete) | |
306 | */ | |
307 | (*op)->named.data = aml_op_start; | |
308 | (*op)->named.length = 0; | |
309 | } | |
310 | ||
311 | return_ACPI_STATUS(AE_OK); | |
312 | } | |
313 | ||
314 | /******************************************************************************* | |
315 | * | |
316 | * FUNCTION: acpi_ps_create_op | |
317 | * | |
318 | * PARAMETERS: walk_state - Current state | |
319 | * aml_op_start - Op start in AML | |
320 | * new_op - Returned Op | |
321 | * | |
322 | * RETURN: Status | |
323 | * | |
324 | * DESCRIPTION: Get Op from AML | |
325 | * | |
326 | ******************************************************************************/ | |
327 | ||
328 | acpi_status | |
329 | acpi_ps_create_op(struct acpi_walk_state *walk_state, | |
330 | u8 *aml_op_start, union acpi_parse_object **new_op) | |
331 | { | |
332 | acpi_status status = AE_OK; | |
333 | union acpi_parse_object *op; | |
334 | union acpi_parse_object *named_op = NULL; | |
335 | union acpi_parse_object *parent_scope; | |
336 | u8 argument_count; | |
337 | const struct acpi_opcode_info *op_info; | |
338 | ||
339 | ACPI_FUNCTION_TRACE_PTR(ps_create_op, walk_state); | |
340 | ||
341 | status = acpi_ps_get_aml_opcode(walk_state); | |
342 | if (status == AE_CTRL_PARSE_CONTINUE) { | |
343 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); | |
344 | } | |
345 | if (ACPI_FAILURE(status)) { | |
346 | return_ACPI_STATUS(status); | |
347 | } | |
348 | ||
349 | /* Create Op structure and append to parent's argument list */ | |
350 | ||
351 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); | |
352 | op = acpi_ps_alloc_op(walk_state->opcode, aml_op_start); | |
353 | if (!op) { | |
354 | return_ACPI_STATUS(AE_NO_MEMORY); | |
355 | } | |
356 | ||
357 | if (walk_state->op_info->flags & AML_NAMED) { | |
358 | status = | |
359 | acpi_ps_build_named_op(walk_state, aml_op_start, op, | |
360 | &named_op); | |
361 | acpi_ps_free_op(op); | |
362 | if (ACPI_FAILURE(status)) { | |
363 | return_ACPI_STATUS(status); | |
364 | } | |
365 | ||
366 | *new_op = named_op; | |
367 | return_ACPI_STATUS(AE_OK); | |
368 | } | |
369 | ||
370 | /* Not a named opcode, just allocate Op and append to parent */ | |
371 | ||
372 | if (walk_state->op_info->flags & AML_CREATE) { | |
373 | /* | |
374 | * Backup to beginning of create_XXXfield declaration | |
375 | * body_length is unknown until we parse the body | |
376 | */ | |
377 | op->named.data = aml_op_start; | |
378 | op->named.length = 0; | |
379 | } | |
380 | ||
381 | if (walk_state->opcode == AML_BANK_FIELD_OP) { | |
382 | /* | |
383 | * Backup to beginning of bank_field declaration | |
384 | * body_length is unknown until we parse the body | |
385 | */ | |
386 | op->named.data = aml_op_start; | |
387 | op->named.length = 0; | |
388 | } | |
389 | ||
390 | parent_scope = acpi_ps_get_parent_scope(&(walk_state->parser_state)); | |
391 | acpi_ps_append_arg(parent_scope, op); | |
392 | ||
393 | if (parent_scope) { | |
394 | op_info = | |
395 | acpi_ps_get_opcode_info(parent_scope->common.aml_opcode); | |
396 | if (op_info->flags & AML_HAS_TARGET) { | |
397 | argument_count = | |
398 | acpi_ps_get_argument_count(op_info->type); | |
399 | if (parent_scope->common.arg_list_length > | |
400 | argument_count) { | |
401 | op->common.flags |= ACPI_PARSEOP_TARGET; | |
402 | } | |
403 | } | |
404 | ||
405 | /* | |
406 | * Special case for both Increment() and Decrement(), where | |
407 | * the lone argument is both a source and a target. | |
408 | */ | |
409 | else if ((parent_scope->common.aml_opcode == AML_INCREMENT_OP) | |
410 | || (parent_scope->common.aml_opcode == | |
411 | AML_DECREMENT_OP)) { | |
412 | op->common.flags |= ACPI_PARSEOP_TARGET; | |
413 | } | |
414 | } | |
415 | ||
416 | if (walk_state->descending_callback != NULL) { | |
417 | /* | |
418 | * Find the object. This will either insert the object into | |
419 | * the namespace or simply look it up | |
420 | */ | |
421 | walk_state->op = *new_op = op; | |
422 | ||
423 | status = walk_state->descending_callback(walk_state, &op); | |
424 | status = acpi_ps_next_parse_state(walk_state, op, status); | |
425 | if (status == AE_CTRL_PENDING) { | |
426 | status = AE_CTRL_PARSE_PENDING; | |
427 | } | |
428 | } | |
429 | ||
430 | return_ACPI_STATUS(status); | |
431 | } | |
432 | ||
433 | /******************************************************************************* | |
434 | * | |
435 | * FUNCTION: acpi_ps_complete_op | |
436 | * | |
437 | * PARAMETERS: walk_state - Current state | |
438 | * op - Returned Op | |
439 | * status - Parse status before complete Op | |
440 | * | |
441 | * RETURN: Status | |
442 | * | |
443 | * DESCRIPTION: Complete Op | |
444 | * | |
445 | ******************************************************************************/ | |
446 | ||
447 | acpi_status | |
448 | acpi_ps_complete_op(struct acpi_walk_state *walk_state, | |
449 | union acpi_parse_object **op, acpi_status status) | |
450 | { | |
451 | acpi_status status2; | |
452 | ||
453 | ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state); | |
454 | ||
455 | /* | |
456 | * Finished one argument of the containing scope | |
457 | */ | |
458 | walk_state->parser_state.scope->parse_scope.arg_count--; | |
459 | ||
460 | /* Close this Op (will result in parse subtree deletion) */ | |
461 | ||
462 | status2 = acpi_ps_complete_this_op(walk_state, *op); | |
463 | if (ACPI_FAILURE(status2)) { | |
464 | return_ACPI_STATUS(status2); | |
465 | } | |
466 | ||
467 | *op = NULL; | |
468 | ||
469 | switch (status) { | |
470 | case AE_OK: | |
471 | ||
472 | break; | |
473 | ||
474 | case AE_CTRL_TRANSFER: | |
475 | ||
476 | /* We are about to transfer to a called method */ | |
477 | ||
478 | walk_state->prev_op = NULL; | |
479 | walk_state->prev_arg_types = walk_state->arg_types; | |
480 | return_ACPI_STATUS(status); | |
481 | ||
482 | case AE_CTRL_END: | |
483 | ||
484 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
485 | &walk_state->arg_types, | |
486 | &walk_state->arg_count); | |
487 | ||
488 | if (*op) { | |
489 | walk_state->op = *op; | |
490 | walk_state->op_info = | |
491 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); | |
492 | walk_state->opcode = (*op)->common.aml_opcode; | |
493 | ||
494 | status = walk_state->ascending_callback(walk_state); | |
495 | status = | |
496 | acpi_ps_next_parse_state(walk_state, *op, status); | |
497 | ||
498 | status2 = acpi_ps_complete_this_op(walk_state, *op); | |
499 | if (ACPI_FAILURE(status2)) { | |
500 | return_ACPI_STATUS(status2); | |
501 | } | |
502 | } | |
503 | ||
504 | status = AE_OK; | |
505 | break; | |
506 | ||
507 | case AE_CTRL_BREAK: | |
508 | case AE_CTRL_CONTINUE: | |
509 | ||
510 | /* Pop off scopes until we find the While */ | |
511 | ||
512 | while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) { | |
513 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
514 | &walk_state->arg_types, | |
515 | &walk_state->arg_count); | |
516 | } | |
517 | ||
518 | /* Close this iteration of the While loop */ | |
519 | ||
520 | walk_state->op = *op; | |
521 | walk_state->op_info = | |
522 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); | |
523 | walk_state->opcode = (*op)->common.aml_opcode; | |
524 | ||
525 | status = walk_state->ascending_callback(walk_state); | |
526 | status = acpi_ps_next_parse_state(walk_state, *op, status); | |
527 | ||
528 | status2 = acpi_ps_complete_this_op(walk_state, *op); | |
529 | if (ACPI_FAILURE(status2)) { | |
530 | return_ACPI_STATUS(status2); | |
531 | } | |
532 | ||
533 | status = AE_OK; | |
534 | break; | |
535 | ||
536 | case AE_CTRL_TERMINATE: | |
537 | ||
538 | /* Clean up */ | |
539 | do { | |
540 | if (*op) { | |
541 | status2 = | |
542 | acpi_ps_complete_this_op(walk_state, *op); | |
543 | if (ACPI_FAILURE(status2)) { | |
544 | return_ACPI_STATUS(status2); | |
545 | } | |
546 | ||
547 | acpi_ut_delete_generic_state | |
548 | (acpi_ut_pop_generic_state | |
549 | (&walk_state->control_state)); | |
550 | } | |
551 | ||
552 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
553 | &walk_state->arg_types, | |
554 | &walk_state->arg_count); | |
555 | ||
556 | } while (*op); | |
557 | ||
558 | return_ACPI_STATUS(AE_OK); | |
559 | ||
560 | default: /* All other non-AE_OK status */ | |
561 | ||
562 | do { | |
563 | if (*op) { | |
564 | status2 = | |
565 | acpi_ps_complete_this_op(walk_state, *op); | |
566 | if (ACPI_FAILURE(status2)) { | |
567 | return_ACPI_STATUS(status2); | |
568 | } | |
569 | } | |
570 | ||
571 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
572 | &walk_state->arg_types, | |
573 | &walk_state->arg_count); | |
574 | ||
575 | } while (*op); | |
576 | ||
577 | #if 0 | |
578 | /* | |
579 | * TBD: Cleanup parse ops on error | |
580 | */ | |
581 | if (*op == NULL) { | |
582 | acpi_ps_pop_scope(parser_state, op, | |
583 | &walk_state->arg_types, | |
584 | &walk_state->arg_count); | |
585 | } | |
586 | #endif | |
587 | walk_state->prev_op = NULL; | |
588 | walk_state->prev_arg_types = walk_state->arg_types; | |
589 | return_ACPI_STATUS(status); | |
590 | } | |
591 | ||
592 | /* This scope complete? */ | |
593 | ||
594 | if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) { | |
595 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | |
596 | &walk_state->arg_types, | |
597 | &walk_state->arg_count); | |
598 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *op)); | |
599 | } else { | |
600 | *op = NULL; | |
601 | } | |
602 | ||
603 | return_ACPI_STATUS(AE_OK); | |
604 | } | |
605 | ||
606 | /******************************************************************************* | |
607 | * | |
608 | * FUNCTION: acpi_ps_complete_final_op | |
609 | * | |
610 | * PARAMETERS: walk_state - Current state | |
611 | * op - Current Op | |
612 | * status - Current parse status before complete last | |
613 | * Op | |
614 | * | |
615 | * RETURN: Status | |
616 | * | |
617 | * DESCRIPTION: Complete last Op. | |
618 | * | |
619 | ******************************************************************************/ | |
620 | ||
621 | acpi_status | |
622 | acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, | |
623 | union acpi_parse_object *op, acpi_status status) | |
624 | { | |
625 | acpi_status status2; | |
626 | ||
627 | ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state); | |
628 | ||
629 | /* | |
630 | * Complete the last Op (if not completed), and clear the scope stack. | |
631 | * It is easily possible to end an AML "package" with an unbounded number | |
632 | * of open scopes (such as when several ASL blocks are closed with | |
633 | * sequential closing braces). We want to terminate each one cleanly. | |
634 | */ | |
635 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", | |
636 | op)); | |
637 | do { | |
638 | if (op) { | |
639 | if (walk_state->ascending_callback != NULL) { | |
640 | walk_state->op = op; | |
641 | walk_state->op_info = | |
642 | acpi_ps_get_opcode_info(op->common. | |
643 | aml_opcode); | |
644 | walk_state->opcode = op->common.aml_opcode; | |
645 | ||
646 | status = | |
647 | walk_state->ascending_callback(walk_state); | |
648 | status = | |
649 | acpi_ps_next_parse_state(walk_state, op, | |
650 | status); | |
651 | if (status == AE_CTRL_PENDING) { | |
652 | status = | |
653 | acpi_ps_complete_op(walk_state, &op, | |
654 | AE_OK); | |
655 | if (ACPI_FAILURE(status)) { | |
656 | return_ACPI_STATUS(status); | |
657 | } | |
658 | } | |
659 | ||
660 | if (status == AE_CTRL_TERMINATE) { | |
661 | status = AE_OK; | |
662 | ||
663 | /* Clean up */ | |
664 | do { | |
665 | if (op) { | |
666 | status2 = | |
667 | acpi_ps_complete_this_op | |
668 | (walk_state, op); | |
669 | if (ACPI_FAILURE | |
670 | (status2)) { | |
671 | return_ACPI_STATUS | |
672 | (status2); | |
673 | } | |
674 | } | |
675 | ||
676 | acpi_ps_pop_scope(& | |
677 | (walk_state-> | |
678 | parser_state), | |
679 | &op, | |
680 | &walk_state-> | |
681 | arg_types, | |
682 | &walk_state-> | |
683 | arg_count); | |
684 | ||
685 | } while (op); | |
686 | ||
687 | return_ACPI_STATUS(status); | |
688 | } | |
689 | ||
690 | else if (ACPI_FAILURE(status)) { | |
691 | ||
692 | /* First error is most important */ | |
693 | ||
694 | (void) | |
695 | acpi_ps_complete_this_op(walk_state, | |
696 | op); | |
697 | return_ACPI_STATUS(status); | |
698 | } | |
699 | } | |
700 | ||
701 | status2 = acpi_ps_complete_this_op(walk_state, op); | |
702 | if (ACPI_FAILURE(status2)) { | |
703 | return_ACPI_STATUS(status2); | |
704 | } | |
705 | } | |
706 | ||
707 | acpi_ps_pop_scope(&(walk_state->parser_state), &op, | |
708 | &walk_state->arg_types, | |
709 | &walk_state->arg_count); | |
710 | ||
711 | } while (op); | |
712 | ||
713 | return_ACPI_STATUS(status); | |
714 | } |