1 /******************************************************************************
2 *
3 * Module Name: aslwalks.c - Miscellaneous analytical parse tree walks
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "aslcompiler.h"
153 #include "aslcompiler.y.h"
154 #include "acparser.h"
155 #include "amlcode.h"
156
157
158 #define _COMPONENT ACPI_COMPILER
159 ACPI_MODULE_NAME ("aslwalks")
160
161
162 /* Local prototypes */
163
164 static void
165 AnAnalyzeStoreOperator (
166 ACPI_PARSE_OBJECT *Op);
167
168
169 /*******************************************************************************
170 *
171 * FUNCTION: AnMethodTypingWalkEnd
172 *
173 * PARAMETERS: ASL_WALK_CALLBACK
174 *
175 * RETURN: Status
176 *
177 * DESCRIPTION: Ascending callback for typing walk. Complete the method
178 * return analysis. Check methods for:
179 * 1) Initialized local variables
180 * 2) Valid arguments
181 * 3) Return types
182 *
183 ******************************************************************************/
184
185 ACPI_STATUS
AnMethodTypingWalkEnd(ACPI_PARSE_OBJECT * Op,UINT32 Level,void * Context)186 AnMethodTypingWalkEnd (
187 ACPI_PARSE_OBJECT *Op,
188 UINT32 Level,
189 void *Context)
190 {
191 UINT32 ThisOpBtype;
192
193
194 switch (Op->Asl.ParseOpcode)
195 {
196 case PARSEOP_METHOD:
197
198 Op->Asl.CompileFlags |= OP_METHOD_TYPED;
199 break;
200
201 case PARSEOP_RETURN:
202
203 if ((Op->Asl.Child) &&
204 (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))
205 {
206 ThisOpBtype = AnGetBtype (Op->Asl.Child);
207
208 if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_METHODCALL) &&
209 (ThisOpBtype == (ACPI_UINT32_MAX -1)))
210 {
211 /*
212 * The called method is untyped at this time (typically a
213 * forward reference).
214 *
215 * Check for a recursive method call first. Note: the
216 * Child->Node will be null if the method has not been
217 * resolved.
218 */
219 if (Op->Asl.Child->Asl.Node &&
220 (Op->Asl.ParentMethod != Op->Asl.Child->Asl.Node->Op))
221 {
222 /* We must type the method here */
223
224 TrWalkParseTree (Op->Asl.Child->Asl.Node->Op,
225 ASL_WALK_VISIT_UPWARD, NULL,
226 AnMethodTypingWalkEnd, NULL);
227
228 ThisOpBtype = AnGetBtype (Op->Asl.Child);
229 }
230 }
231
232 /* Returns a value, save the value type */
233
234 if (Op->Asl.ParentMethod)
235 {
236 Op->Asl.ParentMethod->Asl.AcpiBtype |= ThisOpBtype;
237 }
238 }
239 break;
240
241 default:
242
243 break;
244 }
245
246 return (AE_OK);
247 }
248
249
250 /*******************************************************************************
251 *
252 * FUNCTION: AnOperandTypecheckWalkEnd
253 *
254 * PARAMETERS: ASL_WALK_CALLBACK
255 *
256 * RETURN: Status
257 *
258 * DESCRIPTION: Ascending callback for analysis walk. Complete method
259 * return analysis.
260 *
261 ******************************************************************************/
262
263 ACPI_STATUS
AnOperandTypecheckWalkEnd(ACPI_PARSE_OBJECT * Op,UINT32 Level,void * Context)264 AnOperandTypecheckWalkEnd (
265 ACPI_PARSE_OBJECT *Op,
266 UINT32 Level,
267 void *Context)
268 {
269 const ACPI_OPCODE_INFO *OpInfo;
270 UINT32 RuntimeArgTypes;
271 UINT32 RuntimeArgTypes2;
272 UINT32 RequiredBtypes;
273 UINT32 ThisNodeBtype;
274 UINT32 CommonBtypes;
275 UINT32 OpcodeClass;
276 ACPI_PARSE_OBJECT *ArgOp;
277 UINT32 ArgType;
278
279
280 switch (Op->Asl.AmlOpcode)
281 {
282 case AML_RAW_DATA_BYTE:
283 case AML_RAW_DATA_WORD:
284 case AML_RAW_DATA_DWORD:
285 case AML_RAW_DATA_QWORD:
286 case AML_RAW_DATA_BUFFER:
287 case AML_RAW_DATA_CHAIN:
288 case AML_PACKAGE_LENGTH:
289 case AML_UNASSIGNED_OPCODE:
290 case AML_DEFAULT_ARG_OP:
291
292 /* Ignore the internal (compiler-only) AML opcodes */
293
294 return (AE_OK);
295
296 default:
297
298 break;
299 }
300
301 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
302 if (!OpInfo)
303 {
304 return (AE_OK);
305 }
306
307 ArgOp = Op->Asl.Child;
308 OpcodeClass = OpInfo->Class;
309 RuntimeArgTypes = OpInfo->RuntimeArgs;
310
311 #ifdef ASL_ERROR_NAMED_OBJECT_IN_WHILE
312 /*
313 * Update 11/2008: In practice, we can't perform this check. A simple
314 * analysis is not sufficient. Also, it can cause errors when compiling
315 * disassembled code because of the way Switch operators are implemented
316 * (a While(One) loop with a named temp variable created within.)
317 */
318
319 /*
320 * If we are creating a named object, check if we are within a while loop
321 * by checking if the parent is a WHILE op. This is a simple analysis, but
322 * probably sufficient for many cases.
323 *
324 * Allow Scope(), Buffer(), and Package().
325 */
326 if (((OpcodeClass == AML_CLASS_NAMED_OBJECT) && (Op->Asl.AmlOpcode != AML_SCOPE_OP)) ||
327 ((OpcodeClass == AML_CLASS_CREATE) && (OpInfo->Flags & AML_NSNODE)))
328 {
329 if (Op->Asl.Parent->Asl.AmlOpcode == AML_WHILE_OP)
330 {
331 AslError (ASL_ERROR, ASL_MSG_NAMED_OBJECT_IN_WHILE, Op, NULL);
332 }
333 }
334 #endif
335
336 /*
337 * Special case for control opcodes IF/RETURN/WHILE since they
338 * have no runtime arg list (at this time)
339 */
340 switch (Op->Asl.AmlOpcode)
341 {
342 case AML_IF_OP:
343 case AML_WHILE_OP:
344 case AML_RETURN_OP:
345
346 if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)
347 {
348 /* Check for an internal method */
349
350 if (AnIsInternalMethod (ArgOp))
351 {
352 return (AE_OK);
353 }
354
355 /* The lone arg is a method call, check it */
356
357 RequiredBtypes = AnMapArgTypeToBtype (ARGI_INTEGER);
358 if (Op->Asl.AmlOpcode == AML_RETURN_OP)
359 {
360 RequiredBtypes = 0xFFFFFFFF;
361 }
362
363 ThisNodeBtype = AnGetBtype (ArgOp);
364 if (ThisNodeBtype == ACPI_UINT32_MAX)
365 {
366 return (AE_OK);
367 }
368
369 AnCheckMethodReturnValue (Op, OpInfo, ArgOp,
370 RequiredBtypes, ThisNodeBtype);
371 }
372 return (AE_OK);
373
374 case AML_EXTERNAL_OP:
375 /*
376 * Not really a "runtime" opcode since it used by disassembler only.
377 * The parser will find any issues with the operands.
378 */
379 return (AE_OK);
380
381 default:
382
383 break;
384 }
385
386 /* Ignore the non-executable opcodes */
387
388 if (RuntimeArgTypes == ARGI_INVALID_OPCODE)
389 {
390 return (AE_OK);
391 }
392
393 /*
394 * Special handling for certain opcodes.
395 */
396 switch (Op->Asl.AmlOpcode)
397 {
398 /* BankField has one TermArg */
399
400 case AML_BANK_FIELD_OP:
401
402 OpcodeClass = AML_CLASS_EXECUTE;
403 ArgOp = ArgOp->Asl.Next;
404 ArgOp = ArgOp->Asl.Next;
405 break;
406
407 /* Operation Region has 2 TermArgs */
408
409 case AML_REGION_OP:
410
411 OpcodeClass = AML_CLASS_EXECUTE;
412 ArgOp = ArgOp->Asl.Next;
413 ArgOp = ArgOp->Asl.Next;
414 break;
415
416 /* DataTableRegion has 3 TermArgs */
417
418 case AML_DATA_REGION_OP:
419
420 OpcodeClass = AML_CLASS_EXECUTE;
421 ArgOp = ArgOp->Asl.Next;
422 break;
423
424 /* Buffers/Packages have a length that is a TermArg */
425
426 case AML_BUFFER_OP:
427 case AML_PACKAGE_OP:
428 case AML_VARIABLE_PACKAGE_OP:
429
430 /* If length is a constant, we are done */
431
432 if ((ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER) ||
433 (ArgOp->Asl.ParseOpcode == PARSEOP_RAW_DATA))
434 {
435 return (AE_OK);
436 }
437 break;
438
439 /* Store can write any object to the Debug object */
440
441 case AML_STORE_OP:
442 /*
443 * If this is a Store() to the Debug object, we don't need
444 * to perform any further validation -- because a Store of
445 * any object to Debug is permitted and supported.
446 */
447 if (ArgOp->Asl.Next->Asl.AmlOpcode == AML_DEBUG_OP)
448 {
449 return (AE_OK);
450 }
451 break;
452
453 default:
454 break;
455 }
456
457 switch (OpcodeClass)
458 {
459 case AML_CLASS_EXECUTE:
460 case AML_CLASS_CREATE:
461 case AML_CLASS_CONTROL:
462 case AML_CLASS_RETURN_VALUE:
463
464 /* Reverse the runtime argument list */
465
466 RuntimeArgTypes2 = 0;
467 while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes)))
468 {
469 RuntimeArgTypes2 <<= ARG_TYPE_WIDTH;
470 RuntimeArgTypes2 |= ArgType;
471 INCREMENT_ARG_LIST (RuntimeArgTypes);
472 }
473
474 /* Typecheck each argument */
475
476 while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes2)))
477 {
478 /* Get the required type(s) for the argument */
479
480 RequiredBtypes = AnMapArgTypeToBtype (ArgType);
481
482 if (!ArgOp)
483 {
484 AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op,
485 "Null ArgOp in argument loop");
486 AslAbort ();
487 }
488
489 /* Get the actual type of the argument */
490
491 ThisNodeBtype = AnGetBtype (ArgOp);
492 if (ThisNodeBtype == ACPI_UINT32_MAX)
493 {
494 goto NextArgument;
495 }
496
497 /* Examine the arg based on the required type of the arg */
498
499 switch (ArgType)
500 {
501 case ARGI_TARGETREF:
502
503 if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO)
504 {
505 /* ZERO is the placeholder for "don't store result" */
506
507 ThisNodeBtype = RequiredBtypes;
508 break;
509 }
510
511 /* Fallthrough */
512
513 case ARGI_STORE_TARGET:
514
515 if (ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER)
516 {
517 /*
518 * This is the case where an original reference to a resource
519 * descriptor field has been replaced by an (Integer) offset.
520 * These named fields are supported at compile-time only;
521 * the names are not passed to the interpreter (via the AML).
522 */
523 if ((ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
524 (ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
525 {
526 AslError (ASL_ERROR, ASL_MSG_RESOURCE_FIELD,
527 ArgOp, NULL);
528 }
529 else
530 {
531 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE,
532 ArgOp, NULL);
533 }
534 }
535 break;
536
537
538 #ifdef __FUTURE_IMPLEMENTATION
539 /*
540 * Possible future typechecking support
541 */
542 case ARGI_REFERENCE: /* References */
543 case ARGI_INTEGER_REF:
544 case ARGI_OBJECT_REF:
545 case ARGI_DEVICE_REF:
546
547 switch (ArgOp->Asl.ParseOpcode)
548 {
549 case PARSEOP_LOCAL0:
550 case PARSEOP_LOCAL1:
551 case PARSEOP_LOCAL2:
552 case PARSEOP_LOCAL3:
553 case PARSEOP_LOCAL4:
554 case PARSEOP_LOCAL5:
555 case PARSEOP_LOCAL6:
556 case PARSEOP_LOCAL7:
557
558 /* TBD: implement analysis of current value (type) of the local */
559 /* For now, just treat any local as a typematch */
560
561 /*ThisNodeBtype = RequiredBtypes;*/
562 break;
563
564 case PARSEOP_ARG0:
565 case PARSEOP_ARG1:
566 case PARSEOP_ARG2:
567 case PARSEOP_ARG3:
568 case PARSEOP_ARG4:
569 case PARSEOP_ARG5:
570 case PARSEOP_ARG6:
571
572 /* Hard to analyze argument types, so we won't */
573 /* for now. Just treat any arg as a typematch */
574
575 /* ThisNodeBtype = RequiredBtypes; */
576 break;
577
578 case PARSEOP_DEBUG:
579 case PARSEOP_REFOF:
580 case PARSEOP_INDEX:
581 default:
582
583 break;
584 }
585 break;
586 #endif
587 case ARGI_INTEGER:
588 default:
589
590 break;
591 }
592
593
594 /* Check for a type mismatch (required versus actual) */
595
596 CommonBtypes = ThisNodeBtype & RequiredBtypes;
597
598 if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)
599 {
600 if (AnIsInternalMethod (ArgOp))
601 {
602 return (AE_OK);
603 }
604
605 /* Check a method call for a valid return value */
606
607 AnCheckMethodReturnValue (Op, OpInfo, ArgOp,
608 RequiredBtypes, ThisNodeBtype);
609 }
610
611 /*
612 * Now check if the actual type(s) match at least one
613 * bit to the required type
614 */
615 else if (!CommonBtypes)
616 {
617 /* No match -- this is a type mismatch error */
618
619 AnFormatBtype (StringBuffer, ThisNodeBtype);
620 AnFormatBtype (StringBuffer2, RequiredBtypes);
621
622 sprintf (MsgBuffer, "[%s] found, %s operator requires [%s]",
623 StringBuffer, OpInfo->Name, StringBuffer2);
624
625 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE,
626 ArgOp, MsgBuffer);
627 }
628
629 NextArgument:
630 ArgOp = ArgOp->Asl.Next;
631 INCREMENT_ARG_LIST (RuntimeArgTypes2);
632 }
633 break;
634
635 default:
636
637 break;
638 }
639
640 return (AE_OK);
641 }
642
643
644 /*******************************************************************************
645 *
646 * FUNCTION: AnOtherSemanticAnalysisWalkBegin
647 *
648 * PARAMETERS: ASL_WALK_CALLBACK
649 *
650 * RETURN: Status
651 *
652 * DESCRIPTION: Descending callback for the analysis walk. Checks for
653 * miscellaneous issues in the code.
654 *
655 ******************************************************************************/
656
657 ACPI_STATUS
AnOtherSemanticAnalysisWalkBegin(ACPI_PARSE_OBJECT * Op,UINT32 Level,void * Context)658 AnOtherSemanticAnalysisWalkBegin (
659 ACPI_PARSE_OBJECT *Op,
660 UINT32 Level,
661 void *Context)
662 {
663 ACPI_PARSE_OBJECT *ArgOp;
664 ACPI_PARSE_OBJECT *PrevArgOp = NULL;
665 const ACPI_OPCODE_INFO *OpInfo;
666 ACPI_NAMESPACE_NODE *Node;
667
668
669 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
670
671
672 /*
673 * Determine if an execution class operator actually does something by
674 * checking if it has a target and/or the function return value is used.
675 * (Target is optional, so a standalone statement can actually do nothing.)
676 */
677 if ((OpInfo->Class == AML_CLASS_EXECUTE) &&
678 (OpInfo->Flags & AML_HAS_RETVAL) &&
679 (!AnIsResultUsed (Op)))
680 {
681 if (OpInfo->Flags & AML_HAS_TARGET)
682 {
683 /*
684 * Find the target node, it is always the last child. If the target
685 * is not specified in the ASL, a default node of type Zero was
686 * created by the parser.
687 */
688 ArgOp = Op->Asl.Child;
689 while (ArgOp->Asl.Next)
690 {
691 PrevArgOp = ArgOp;
692 ArgOp = ArgOp->Asl.Next;
693 }
694
695 /* Divide() is the only weird case, it has two targets */
696
697 if (Op->Asl.AmlOpcode == AML_DIVIDE_OP)
698 {
699 if ((ArgOp->Asl.ParseOpcode == PARSEOP_ZERO) &&
700 (PrevArgOp) &&
701 (PrevArgOp->Asl.ParseOpcode == PARSEOP_ZERO))
702 {
703 AslError (ASL_ERROR, ASL_MSG_RESULT_NOT_USED,
704 Op, Op->Asl.ExternalName);
705 }
706 }
707
708 else if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO)
709 {
710 AslError (ASL_ERROR, ASL_MSG_RESULT_NOT_USED,
711 Op, Op->Asl.ExternalName);
712 }
713 }
714 else
715 {
716 /*
717 * Has no target and the result is not used. Only a couple opcodes
718 * can have this combination.
719 */
720 switch (Op->Asl.ParseOpcode)
721 {
722 case PARSEOP_ACQUIRE:
723 case PARSEOP_WAIT:
724 case PARSEOP_LOADTABLE:
725
726 break;
727
728 default:
729
730 AslError (ASL_ERROR, ASL_MSG_RESULT_NOT_USED,
731 Op, Op->Asl.ExternalName);
732 break;
733 }
734 }
735 }
736
737
738 /*
739 * Semantic checks for individual ASL operators
740 */
741 switch (Op->Asl.ParseOpcode)
742 {
743 case PARSEOP_STORE:
744
745 if (Gbl_DoTypechecking)
746 {
747 AnAnalyzeStoreOperator (Op);
748 }
749 break;
750
751
752 case PARSEOP_ACQUIRE:
753 case PARSEOP_WAIT:
754 /*
755 * Emit a warning if the timeout parameter for these operators is not
756 * ACPI_WAIT_FOREVER, and the result value from the operator is not
757 * checked, meaning that a timeout could happen, but the code
758 * would not know about it.
759 */
760
761 /* First child is the namepath, 2nd child is timeout */
762
763 ArgOp = Op->Asl.Child;
764 ArgOp = ArgOp->Asl.Next;
765
766 /*
767 * Check for the WAIT_FOREVER case - defined by the ACPI spec to be
768 * 0xFFFF or greater
769 */
770 if (((ArgOp->Asl.ParseOpcode == PARSEOP_WORDCONST) ||
771 (ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER)) &&
772 (ArgOp->Asl.Value.Integer >= (UINT64) ACPI_WAIT_FOREVER))
773 {
774 break;
775 }
776
777 /*
778 * The operation could timeout. If the return value is not used
779 * (indicates timeout occurred), issue a warning
780 */
781 if (!AnIsResultUsed (Op))
782 {
783 AslError (ASL_WARNING, ASL_MSG_TIMEOUT, ArgOp,
784 Op->Asl.ExternalName);
785 }
786 break;
787
788 case PARSEOP_CREATEFIELD:
789 /*
790 * Check for a zero Length (NumBits) operand. NumBits is the 3rd operand
791 */
792 ArgOp = Op->Asl.Child;
793 ArgOp = ArgOp->Asl.Next;
794 ArgOp = ArgOp->Asl.Next;
795
796 if ((ArgOp->Asl.ParseOpcode == PARSEOP_ZERO) ||
797 ((ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER) &&
798 (ArgOp->Asl.Value.Integer == 0)))
799 {
800 AslError (ASL_ERROR, ASL_MSG_NON_ZERO, ArgOp, NULL);
801 }
802 break;
803
804 case PARSEOP_CONNECTION:
805 /*
806 * Ensure that the referenced operation region has the correct SPACE_ID.
807 * From the grammar/parser, we know the parent is a FIELD definition.
808 */
809 ArgOp = Op->Asl.Parent; /* Field definition */
810 ArgOp = ArgOp->Asl.Child; /* First child is the OpRegion Name */
811 Node = ArgOp->Asl.Node; /* OpRegion namespace node */
812 if (!Node)
813 {
814 break;
815 }
816
817 ArgOp = Node->Op; /* OpRegion definition */
818 ArgOp = ArgOp->Asl.Child; /* First child is the OpRegion Name */
819 ArgOp = ArgOp->Asl.Next; /* Next peer is the SPACE_ID (what we want) */
820
821 /*
822 * The Connection() operator is only valid for the following operation
823 * region SpaceIds: GeneralPurposeIo and GenericSerialBus.
824 */
825 if ((ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) &&
826 (ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GSBUS))
827 {
828 AslError (ASL_ERROR, ASL_MSG_CONNECTION_INVALID, Op, NULL);
829 }
830 break;
831
832 case PARSEOP_FIELD:
833 /*
834 * Ensure that fields for GeneralPurposeIo and GenericSerialBus
835 * contain at least one Connection() operator
836 */
837 ArgOp = Op->Asl.Child; /* 1st child is the OpRegion Name */
838 Node = ArgOp->Asl.Node; /* OpRegion namespace node */
839 if (!Node)
840 {
841 break;
842 }
843
844 ArgOp = Node->Op; /* OpRegion definition */
845 ArgOp = ArgOp->Asl.Child; /* First child is the OpRegion Name */
846 ArgOp = ArgOp->Asl.Next; /* Next peer is the SPACE_ID (what we want) */
847
848 /* We are only interested in GeneralPurposeIo and GenericSerialBus */
849
850 if ((ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) &&
851 (ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GSBUS))
852 {
853 break;
854 }
855
856 ArgOp = Op->Asl.Child; /* 1st child is the OpRegion Name */
857 ArgOp = ArgOp->Asl.Next; /* AccessType */
858 ArgOp = ArgOp->Asl.Next; /* LockRule */
859 ArgOp = ArgOp->Asl.Next; /* UpdateRule */
860 ArgOp = ArgOp->Asl.Next; /* Start of FieldUnitList */
861
862 /* Walk the FieldUnitList */
863
864 while (ArgOp)
865 {
866 if (ArgOp->Asl.ParseOpcode == PARSEOP_CONNECTION)
867 {
868 break;
869 }
870 else if (ArgOp->Asl.ParseOpcode == PARSEOP_NAMESEG)
871 {
872 AslError (ASL_ERROR, ASL_MSG_CONNECTION_MISSING, ArgOp, NULL);
873 break;
874 }
875
876 ArgOp = ArgOp->Asl.Next;
877 }
878 break;
879
880 default:
881
882 break;
883 }
884
885 return (AE_OK);
886 }
887
888
889 /*******************************************************************************
890 *
891 * FUNCTION: AnAnalyzeStoreOperator
892 *
893 * PARAMETERS: Op - Store() operator
894 *
895 * RETURN: None
896 *
897 * DESCRIPTION: Analyze a store operator. Mostly for stores to/from package
898 * objects where there are more restrictions than other data
899 * types.
900 *
901 ******************************************************************************/
902
903 static void
AnAnalyzeStoreOperator(ACPI_PARSE_OBJECT * Op)904 AnAnalyzeStoreOperator (
905 ACPI_PARSE_OBJECT *Op)
906 {
907 ACPI_NAMESPACE_NODE *SourceNode;
908 ACPI_NAMESPACE_NODE *TargetNode;
909 ACPI_PARSE_OBJECT *SourceOperandOp;
910 ACPI_PARSE_OBJECT *TargetOperandOp;
911 UINT32 SourceOperandBtype;
912 UINT32 TargetOperandBtype;
913
914
915 /* Extract the two operands for STORE */
916
917 SourceOperandOp = Op->Asl.Child;
918 TargetOperandOp = SourceOperandOp->Asl.Next;
919
920 /*
921 * Ignore these Source operand opcodes, they cannot be typechecked,
922 * the actual result is unknown here.
923 */
924 switch (SourceOperandOp->Asl.ParseOpcode)
925 {
926 /* For these, type of the returned value is unknown at compile time */
927
928 case PARSEOP_DEREFOF:
929 case PARSEOP_METHODCALL:
930 case PARSEOP_STORE:
931 case PARSEOP_COPYOBJECT:
932
933 return;
934
935 case PARSEOP_INDEX:
936 case PARSEOP_REFOF:
937
938 if (!Gbl_EnableReferenceTypechecking)
939 {
940 return;
941 }
942
943 /*
944 * These opcodes always return an object reference, and thus
945 * the result can only be stored to a Local, Arg, or Debug.
946 */
947 if (TargetOperandOp->Asl.AmlOpcode == AML_DEBUG_OP)
948 {
949 return;
950 }
951
952 if ((TargetOperandOp->Asl.AmlOpcode < AML_LOCAL0) ||
953 (TargetOperandOp->Asl.AmlOpcode > AML_ARG6))
954 {
955 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, TargetOperandOp,
956 "Source [Reference], Target must be [Local/Arg/Debug]");
957 }
958 return;
959
960 default:
961 break;
962 }
963
964 /*
965 * Ignore these Target operand opcodes, they cannot be typechecked
966 */
967 switch (TargetOperandOp->Asl.ParseOpcode)
968 {
969 case PARSEOP_DEBUG:
970 case PARSEOP_DEREFOF:
971 case PARSEOP_REFOF:
972 case PARSEOP_INDEX:
973 case PARSEOP_STORE:
974
975 return;
976
977 default:
978 break;
979 }
980
981 /*
982 * Ignore typecheck for External() operands of type "UnknownObj",
983 * we don't know the actual type (source or target).
984 */
985 SourceNode = SourceOperandOp->Asl.Node;
986 if (SourceNode &&
987 (SourceNode->Flags & ANOBJ_IS_EXTERNAL) &&
988 (SourceNode->Type == ACPI_TYPE_ANY))
989 {
990 return;
991 }
992
993 TargetNode = TargetOperandOp->Asl.Node;
994 if (TargetNode &&
995 (TargetNode->Flags & ANOBJ_IS_EXTERNAL) &&
996 (TargetNode->Type == ACPI_TYPE_ANY))
997 {
998 return;
999 }
1000
1001 /*
1002 * A NULL node with a namepath AML opcode indicates non-existent
1003 * name. Just return, the error message is generated elsewhere.
1004 */
1005 if ((!SourceNode && (SourceOperandOp->Asl.AmlOpcode == AML_INT_NAMEPATH_OP)) ||
1006 (!TargetNode && (TargetOperandOp->Asl.AmlOpcode == AML_INT_NAMEPATH_OP)))
1007 {
1008 return;
1009 }
1010
1011 /*
1012 * Simple check for source same as target via NS node.
1013 * -- Could be expanded to locals and args.
1014 */
1015 if (SourceNode && TargetNode)
1016 {
1017 if (SourceNode == TargetNode)
1018 {
1019 AslError (ASL_WARNING, ASL_MSG_DUPLICATE_ITEM,
1020 TargetOperandOp, "Source is the same as Target");
1021 return;
1022 }
1023 }
1024
1025 /* Ignore typecheck if either source or target is a local or arg */
1026
1027 if ((SourceOperandOp->Asl.AmlOpcode >= AML_LOCAL0) &&
1028 (SourceOperandOp->Asl.AmlOpcode <= AML_ARG6))
1029 {
1030 return; /* Cannot type a local/arg at compile time */
1031 }
1032
1033 if ((TargetOperandOp->Asl.AmlOpcode >= AML_LOCAL0) &&
1034 (TargetOperandOp->Asl.AmlOpcode <= AML_ARG6))
1035 {
1036 return; /* Cannot type a local/arg at compile time */
1037 }
1038
1039 /*
1040 * Package objects are a special case because they cannot by implicitly
1041 * converted to/from anything. Check for these two illegal cases:
1042 *
1043 * Store (non-package, package)
1044 * Store (package, non-package)
1045 */
1046 SourceOperandBtype = AnGetBtype (SourceOperandOp);
1047 TargetOperandBtype = AnGetBtype (TargetOperandOp);
1048
1049 /* Check source first for (package, non-package) case */
1050
1051 if (SourceOperandBtype & ACPI_BTYPE_PACKAGE)
1052 {
1053 /* If Source is PACKAGE-->Target must be PACKAGE */
1054
1055 if (!(TargetOperandBtype & ACPI_BTYPE_PACKAGE))
1056 {
1057 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, TargetOperandOp,
1058 "Source is [Package], Target must be a package also");
1059 }
1060 }
1061
1062 /* Else check target for (non-package, package) case */
1063
1064 else if (TargetOperandBtype & ACPI_BTYPE_PACKAGE)
1065 {
1066 /* If Target is PACKAGE, Source must be PACKAGE */
1067
1068 if (!(SourceOperandBtype & ACPI_BTYPE_PACKAGE))
1069 {
1070 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, SourceOperandOp,
1071 "Target is [Package], Source must be a package also");
1072 }
1073 }
1074 }
1075