aslanalyze.c revision 1.1
1 2 /****************************************************************************** 3 * 4 * Module Name: aslanalyze.c - check for semantic errors 5 * 6 *****************************************************************************/ 7 8 /****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117 118 #include "aslcompiler.h" 119 #include "aslcompiler.y.h" 120 #include "acparser.h" 121 #include "amlcode.h" 122 123 #define _COMPONENT ACPI_COMPILER 124 ACPI_MODULE_NAME ("aslanalyze") 125 126 /* Local prototypes */ 127 128 static UINT32 129 AnMapArgTypeToBtype ( 130 UINT32 ArgType); 131 132 static UINT32 133 AnMapEtypeToBtype ( 134 UINT32 Etype); 135 136 static void 137 AnFormatBtype ( 138 char *Buffer, 139 UINT32 Btype); 140 141 static UINT32 142 AnGetBtype ( 143 ACPI_PARSE_OBJECT *Op); 144 145 static UINT32 146 AnMapObjTypeToBtype ( 147 ACPI_PARSE_OBJECT *Op); 148 149 static BOOLEAN 150 AnLastStatementIsReturn ( 151 ACPI_PARSE_OBJECT *Op); 152 153 static void 154 AnCheckMethodReturnValue ( 155 ACPI_PARSE_OBJECT *Op, 156 const ACPI_OPCODE_INFO *OpInfo, 157 ACPI_PARSE_OBJECT *ArgOp, 158 UINT32 RequiredBtypes, 159 UINT32 ThisNodeBtype); 160 161 static BOOLEAN 162 AnIsInternalMethod ( 163 ACPI_PARSE_OBJECT *Op); 164 165 static UINT32 166 AnGetInternalMethodReturnType ( 167 ACPI_PARSE_OBJECT *Op); 168 169 BOOLEAN 170 AnIsResultUsed ( 171 ACPI_PARSE_OBJECT *Op); 172 173 174 /******************************************************************************* 175 * 176 * FUNCTION: AnIsInternalMethod 177 * 178 * PARAMETERS: Op - Current op 179 * 180 * RETURN: Boolean 181 * 182 * DESCRIPTION: Check for an internal control method. 183 * 184 ******************************************************************************/ 185 186 static BOOLEAN 187 AnIsInternalMethod ( 188 ACPI_PARSE_OBJECT *Op) 189 { 190 191 if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) || 192 (!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI"))) 193 { 194 return (TRUE); 195 } 196 197 return (FALSE); 198 } 199 200 201 /******************************************************************************* 202 * 203 * FUNCTION: AnGetInternalMethodReturnType 204 * 205 * PARAMETERS: Op - Current op 206 * 207 * RETURN: Btype 208 * 209 * DESCRIPTION: Get the return type of an internal method 210 * 211 ******************************************************************************/ 212 213 static UINT32 214 AnGetInternalMethodReturnType ( 215 ACPI_PARSE_OBJECT *Op) 216 { 217 218 if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) || 219 (!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI"))) 220 { 221 return (ACPI_BTYPE_STRING); 222 } 223 224 return (0); 225 } 226 227 228 /******************************************************************************* 229 * 230 * FUNCTION: AnMapArgTypeToBtype 231 * 232 * PARAMETERS: ArgType - The ARGI required type(s) for this argument, 233 * from the opcode info table 234 * 235 * RETURN: The corresponding Bit-encoded types 236 * 237 * DESCRIPTION: Convert an encoded ARGI required argument type code into a 238 * bitfield type code. Implements the implicit source conversion 239 * rules. 240 * 241 ******************************************************************************/ 242 243 static UINT32 244 AnMapArgTypeToBtype ( 245 UINT32 ArgType) 246 { 247 248 switch (ArgType) 249 { 250 251 /* Simple types */ 252 253 case ARGI_ANYTYPE: 254 return (ACPI_BTYPE_OBJECTS_AND_REFS); 255 256 case ARGI_PACKAGE: 257 return (ACPI_BTYPE_PACKAGE); 258 259 case ARGI_EVENT: 260 return (ACPI_BTYPE_EVENT); 261 262 case ARGI_MUTEX: 263 return (ACPI_BTYPE_MUTEX); 264 265 case ARGI_DDBHANDLE: 266 /* 267 * DDBHandleObject := SuperName 268 * ACPI_BTYPE_REFERENCE: Index reference as parameter of Load/Unload 269 */ 270 return (ACPI_BTYPE_DDB_HANDLE | ACPI_BTYPE_REFERENCE); 271 272 /* Interchangeable types */ 273 /* 274 * Source conversion rules: 275 * Integer, String, and Buffer are all interchangeable 276 */ 277 case ARGI_INTEGER: 278 case ARGI_STRING: 279 case ARGI_BUFFER: 280 case ARGI_BUFFER_OR_STRING: 281 case ARGI_COMPUTEDATA: 282 return (ACPI_BTYPE_COMPUTE_DATA); 283 284 /* References */ 285 286 case ARGI_INTEGER_REF: 287 return (ACPI_BTYPE_INTEGER); 288 289 case ARGI_OBJECT_REF: 290 return (ACPI_BTYPE_ALL_OBJECTS); 291 292 case ARGI_DEVICE_REF: 293 return (ACPI_BTYPE_DEVICE_OBJECTS); 294 295 case ARGI_REFERENCE: 296 return (ACPI_BTYPE_REFERENCE); 297 298 case ARGI_TARGETREF: 299 case ARGI_FIXED_TARGET: 300 case ARGI_SIMPLE_TARGET: 301 return (ACPI_BTYPE_OBJECTS_AND_REFS); 302 303 /* Complex types */ 304 305 case ARGI_DATAOBJECT: 306 307 /* 308 * Buffer, string, package or reference to a Op - 309 * Used only by SizeOf operator 310 */ 311 return (ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER | 312 ACPI_BTYPE_PACKAGE | ACPI_BTYPE_REFERENCE); 313 314 case ARGI_COMPLEXOBJ: 315 316 /* Buffer, String, or package */ 317 318 return (ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER | ACPI_BTYPE_PACKAGE); 319 320 case ARGI_REF_OR_STRING: 321 return (ACPI_BTYPE_STRING | ACPI_BTYPE_REFERENCE); 322 323 case ARGI_REGION_OR_BUFFER: 324 325 /* Used by Load() only. Allow buffers in addition to regions/fields */ 326 327 return (ACPI_BTYPE_REGION | ACPI_BTYPE_BUFFER | ACPI_BTYPE_FIELD_UNIT); 328 329 case ARGI_DATAREFOBJ: 330 return (ACPI_BTYPE_INTEGER |ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER | 331 ACPI_BTYPE_PACKAGE | ACPI_BTYPE_REFERENCE | ACPI_BTYPE_DDB_HANDLE); 332 333 default: 334 break; 335 } 336 337 return (ACPI_BTYPE_OBJECTS_AND_REFS); 338 } 339 340 341 /******************************************************************************* 342 * 343 * FUNCTION: AnMapEtypeToBtype 344 * 345 * PARAMETERS: Etype - Encoded ACPI Type 346 * 347 * RETURN: Btype corresponding to the Etype 348 * 349 * DESCRIPTION: Convert an encoded ACPI type to a bitfield type applying the 350 * operand conversion rules. In other words, returns the type(s) 351 * this Etype is implicitly converted to during interpretation. 352 * 353 ******************************************************************************/ 354 355 static UINT32 356 AnMapEtypeToBtype ( 357 UINT32 Etype) 358 { 359 360 361 if (Etype == ACPI_TYPE_ANY) 362 { 363 return ACPI_BTYPE_OBJECTS_AND_REFS; 364 } 365 366 /* Try the standard ACPI data types */ 367 368 if (Etype <= ACPI_TYPE_EXTERNAL_MAX) 369 { 370 /* 371 * This switch statement implements the allowed operand conversion 372 * rules as per the "ASL Data Types" section of the ACPI 373 * specification. 374 */ 375 switch (Etype) 376 { 377 case ACPI_TYPE_INTEGER: 378 return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_DDB_HANDLE); 379 380 case ACPI_TYPE_STRING: 381 case ACPI_TYPE_BUFFER: 382 return (ACPI_BTYPE_COMPUTE_DATA); 383 384 case ACPI_TYPE_PACKAGE: 385 return (ACPI_BTYPE_PACKAGE); 386 387 case ACPI_TYPE_FIELD_UNIT: 388 return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_FIELD_UNIT); 389 390 case ACPI_TYPE_BUFFER_FIELD: 391 return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_BUFFER_FIELD); 392 393 case ACPI_TYPE_DDB_HANDLE: 394 return (ACPI_BTYPE_INTEGER | ACPI_BTYPE_DDB_HANDLE); 395 396 case ACPI_BTYPE_DEBUG_OBJECT: 397 398 /* Cannot be used as a source operand */ 399 400 return (0); 401 402 default: 403 return (1 << (Etype - 1)); 404 } 405 } 406 407 /* Try the internal data types */ 408 409 switch (Etype) 410 { 411 case ACPI_TYPE_LOCAL_REGION_FIELD: 412 case ACPI_TYPE_LOCAL_BANK_FIELD: 413 case ACPI_TYPE_LOCAL_INDEX_FIELD: 414 415 /* Named fields can be either Integer/Buffer/String */ 416 417 return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_FIELD_UNIT); 418 419 case ACPI_TYPE_LOCAL_ALIAS: 420 421 return (ACPI_BTYPE_INTEGER); 422 423 424 case ACPI_TYPE_LOCAL_RESOURCE: 425 case ACPI_TYPE_LOCAL_RESOURCE_FIELD: 426 427 return (ACPI_BTYPE_REFERENCE); 428 429 default: 430 printf ("Unhandled encoded type: %X\n", Etype); 431 return (0); 432 } 433 } 434 435 436 /******************************************************************************* 437 * 438 * FUNCTION: AnFormatBtype 439 * 440 * PARAMETERS: Btype - Bitfield of ACPI types 441 * Buffer - Where to put the ascii string 442 * 443 * RETURN: None. 444 * 445 * DESCRIPTION: Convert a Btype to a string of ACPI types 446 * 447 ******************************************************************************/ 448 449 static void 450 AnFormatBtype ( 451 char *Buffer, 452 UINT32 Btype) 453 { 454 UINT32 Type; 455 BOOLEAN First = TRUE; 456 457 458 *Buffer = 0; 459 460 if (Btype == 0) 461 { 462 strcat (Buffer, "NoReturnValue"); 463 return; 464 } 465 466 for (Type = 1; Type <= ACPI_TYPE_EXTERNAL_MAX; Type++) 467 { 468 if (Btype & 0x00000001) 469 { 470 if (!First) 471 { 472 strcat (Buffer, "|"); 473 } 474 First = FALSE; 475 strcat (Buffer, AcpiUtGetTypeName (Type)); 476 } 477 Btype >>= 1; 478 } 479 480 if (Btype & 0x00000001) 481 { 482 if (!First) 483 { 484 strcat (Buffer, "|"); 485 } 486 First = FALSE; 487 strcat (Buffer, "Reference"); 488 } 489 490 Btype >>= 1; 491 if (Btype & 0x00000001) 492 { 493 if (!First) 494 { 495 strcat (Buffer, "|"); 496 } 497 First = FALSE; 498 strcat (Buffer, "Resource"); 499 } 500 } 501 502 503 /******************************************************************************* 504 * 505 * FUNCTION: AnGetBtype 506 * 507 * PARAMETERS: Op - Parse node whose type will be returned. 508 * 509 * RETURN: The Btype associated with the Op. 510 * 511 * DESCRIPTION: Get the (bitfield) ACPI type associated with the parse node. 512 * Handles the case where the node is a name or method call and 513 * the actual type must be obtained from the namespace node. 514 * 515 ******************************************************************************/ 516 517 static UINT32 518 AnGetBtype ( 519 ACPI_PARSE_OBJECT *Op) 520 { 521 ACPI_NAMESPACE_NODE *Node; 522 ACPI_PARSE_OBJECT *ReferencedNode; 523 UINT32 ThisNodeBtype = 0; 524 525 526 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || 527 (Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || 528 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) 529 { 530 Node = Op->Asl.Node; 531 if (!Node) 532 { 533 DbgPrint (ASL_DEBUG_OUTPUT, 534 "No attached Nsnode: [%s] at line %u name [%s], ignoring typecheck\n", 535 Op->Asl.ParseOpName, Op->Asl.LineNumber, 536 Op->Asl.ExternalName); 537 return ACPI_UINT32_MAX; 538 } 539 540 ThisNodeBtype = AnMapEtypeToBtype (Node->Type); 541 if (!ThisNodeBtype) 542 { 543 AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op, 544 "could not map type"); 545 } 546 547 /* 548 * Since it was a named reference, enable the 549 * reference bit also 550 */ 551 ThisNodeBtype |= ACPI_BTYPE_REFERENCE; 552 553 if (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) 554 { 555 ReferencedNode = Node->Op; 556 if (!ReferencedNode) 557 { 558 /* Check for an internal method */ 559 560 if (AnIsInternalMethod (Op)) 561 { 562 return (AnGetInternalMethodReturnType (Op)); 563 } 564 565 AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op, 566 "null Op pointer"); 567 return ACPI_UINT32_MAX; 568 } 569 570 if (ReferencedNode->Asl.CompileFlags & NODE_METHOD_TYPED) 571 { 572 ThisNodeBtype = ReferencedNode->Asl.AcpiBtype; 573 } 574 else 575 { 576 return (ACPI_UINT32_MAX -1); 577 } 578 } 579 } 580 else 581 { 582 ThisNodeBtype = Op->Asl.AcpiBtype; 583 } 584 585 return (ThisNodeBtype); 586 } 587 588 589 /******************************************************************************* 590 * 591 * FUNCTION: AnMapObjTypeToBtype 592 * 593 * PARAMETERS: Op - A parse node 594 * 595 * RETURN: A Btype 596 * 597 * DESCRIPTION: Map object to the associated "Btype" 598 * 599 ******************************************************************************/ 600 601 static UINT32 602 AnMapObjTypeToBtype ( 603 ACPI_PARSE_OBJECT *Op) 604 { 605 606 switch (Op->Asl.ParseOpcode) 607 { 608 case PARSEOP_OBJECTTYPE_BFF: /* "BuffFieldObj" */ 609 return (ACPI_BTYPE_BUFFER_FIELD); 610 611 case PARSEOP_OBJECTTYPE_BUF: /* "BuffObj" */ 612 return (ACPI_BTYPE_BUFFER); 613 614 case PARSEOP_OBJECTTYPE_DDB: /* "DDBHandleObj" */ 615 return (ACPI_BTYPE_DDB_HANDLE); 616 617 case PARSEOP_OBJECTTYPE_DEV: /* "DeviceObj" */ 618 return (ACPI_BTYPE_DEVICE); 619 620 case PARSEOP_OBJECTTYPE_EVT: /* "EventObj" */ 621 return (ACPI_BTYPE_EVENT); 622 623 case PARSEOP_OBJECTTYPE_FLD: /* "FieldUnitObj" */ 624 return (ACPI_BTYPE_FIELD_UNIT); 625 626 case PARSEOP_OBJECTTYPE_INT: /* "IntObj" */ 627 return (ACPI_BTYPE_INTEGER); 628 629 case PARSEOP_OBJECTTYPE_MTH: /* "MethodObj" */ 630 return (ACPI_BTYPE_METHOD); 631 632 case PARSEOP_OBJECTTYPE_MTX: /* "MutexObj" */ 633 return (ACPI_BTYPE_MUTEX); 634 635 case PARSEOP_OBJECTTYPE_OPR: /* "OpRegionObj" */ 636 return (ACPI_BTYPE_REGION); 637 638 case PARSEOP_OBJECTTYPE_PKG: /* "PkgObj" */ 639 return (ACPI_BTYPE_PACKAGE); 640 641 case PARSEOP_OBJECTTYPE_POW: /* "PowerResObj" */ 642 return (ACPI_BTYPE_POWER); 643 644 case PARSEOP_OBJECTTYPE_STR: /* "StrObj" */ 645 return (ACPI_BTYPE_STRING); 646 647 case PARSEOP_OBJECTTYPE_THZ: /* "ThermalZoneObj" */ 648 return (ACPI_BTYPE_THERMAL); 649 650 case PARSEOP_OBJECTTYPE_UNK: /* "UnknownObj" */ 651 return (ACPI_BTYPE_OBJECTS_AND_REFS); 652 653 default: 654 return (0); 655 } 656 } 657 658 659 /******************************************************************************* 660 * 661 * FUNCTION: AnMethodAnalysisWalkBegin 662 * 663 * PARAMETERS: ASL_WALK_CALLBACK 664 * 665 * RETURN: Status 666 * 667 * DESCRIPTION: Descending callback for the analysis walk. Check methods for: 668 * 1) Initialized local variables 669 * 2) Valid arguments 670 * 3) Return types 671 * 672 ******************************************************************************/ 673 674 ACPI_STATUS 675 AnMethodAnalysisWalkBegin ( 676 ACPI_PARSE_OBJECT *Op, 677 UINT32 Level, 678 void *Context) 679 { 680 ASL_ANALYSIS_WALK_INFO *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context; 681 ASL_METHOD_INFO *MethodInfo = WalkInfo->MethodStack; 682 ACPI_PARSE_OBJECT *Next; 683 UINT32 RegisterNumber; 684 UINT32 i; 685 char LocalName[] = "Local0"; 686 char ArgName[] = "Arg0"; 687 ACPI_PARSE_OBJECT *ArgNode; 688 ACPI_PARSE_OBJECT *NextType; 689 ACPI_PARSE_OBJECT *NextParamType; 690 UINT8 ActualArgs = 0; 691 692 693 switch (Op->Asl.ParseOpcode) 694 { 695 case PARSEOP_METHOD: 696 697 TotalMethods++; 698 699 /* Create and init method info */ 700 701 MethodInfo = UtLocalCalloc (sizeof (ASL_METHOD_INFO)); 702 MethodInfo->Next = WalkInfo->MethodStack; 703 MethodInfo->Op = Op; 704 705 WalkInfo->MethodStack = MethodInfo; 706 707 /* Get the name node, ignored here */ 708 709 Next = Op->Asl.Child; 710 711 /* Get the NumArguments node */ 712 713 Next = Next->Asl.Next; 714 MethodInfo->NumArguments = (UINT8) 715 (((UINT8) Next->Asl.Value.Integer) & 0x07); 716 717 /* Get the SerializeRule and SyncLevel nodes, ignored here */ 718 719 Next = Next->Asl.Next; 720 Next = Next->Asl.Next; 721 ArgNode = Next; 722 723 /* Get the ReturnType node */ 724 725 Next = Next->Asl.Next; 726 727 NextType = Next->Asl.Child; 728 while (NextType) 729 { 730 /* Get and map each of the ReturnTypes */ 731 732 MethodInfo->ValidReturnTypes |= AnMapObjTypeToBtype (NextType); 733 NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG; 734 NextType = NextType->Asl.Next; 735 } 736 737 /* Get the ParameterType node */ 738 739 Next = Next->Asl.Next; 740 741 NextType = Next->Asl.Child; 742 while (NextType) 743 { 744 if (NextType->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) 745 { 746 NextParamType = NextType->Asl.Child; 747 while (NextParamType) 748 { 749 MethodInfo->ValidArgTypes[ActualArgs] |= AnMapObjTypeToBtype (NextParamType); 750 NextParamType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG; 751 NextParamType = NextParamType->Asl.Next; 752 } 753 } 754 else 755 { 756 MethodInfo->ValidArgTypes[ActualArgs] = 757 AnMapObjTypeToBtype (NextType); 758 NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG; 759 ActualArgs++; 760 } 761 762 NextType = NextType->Asl.Next; 763 } 764 765 if ((MethodInfo->NumArguments) && 766 (MethodInfo->NumArguments != ActualArgs)) 767 { 768 /* error: Param list did not match number of args */ 769 } 770 771 /* Allow numarguments == 0 for Function() */ 772 773 if ((!MethodInfo->NumArguments) && (ActualArgs)) 774 { 775 MethodInfo->NumArguments = ActualArgs; 776 ArgNode->Asl.Value.Integer |= ActualArgs; 777 } 778 779 /* 780 * Actual arguments are initialized at method entry. 781 * All other ArgX "registers" can be used as locals, so we 782 * track their initialization. 783 */ 784 for (i = 0; i < MethodInfo->NumArguments; i++) 785 { 786 MethodInfo->ArgInitialized[i] = TRUE; 787 } 788 break; 789 790 791 case PARSEOP_METHODCALL: 792 793 if (MethodInfo && 794 (Op->Asl.Node == MethodInfo->Op->Asl.Node)) 795 { 796 AslError (ASL_REMARK, ASL_MSG_RECURSION, Op, Op->Asl.ExternalName); 797 } 798 break; 799 800 801 case PARSEOP_LOCAL0: 802 case PARSEOP_LOCAL1: 803 case PARSEOP_LOCAL2: 804 case PARSEOP_LOCAL3: 805 case PARSEOP_LOCAL4: 806 case PARSEOP_LOCAL5: 807 case PARSEOP_LOCAL6: 808 case PARSEOP_LOCAL7: 809 810 if (!MethodInfo) 811 { 812 /* 813 * Local was used outside a control method, or there was an error 814 * in the method declaration. 815 */ 816 AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName); 817 return (AE_ERROR); 818 } 819 820 RegisterNumber = (Op->Asl.AmlOpcode & 0x000F); 821 822 /* 823 * If the local is being used as a target, mark the local 824 * initialized 825 */ 826 if (Op->Asl.CompileFlags & NODE_IS_TARGET) 827 { 828 MethodInfo->LocalInitialized[RegisterNumber] = TRUE; 829 } 830 831 /* 832 * Otherwise, this is a reference, check if the local 833 * has been previously initialized. 834 * 835 * The only operator that accepts an uninitialized value is ObjectType() 836 */ 837 else if ((!MethodInfo->LocalInitialized[RegisterNumber]) && 838 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE)) 839 { 840 LocalName[strlen (LocalName) -1] = (char) (RegisterNumber + 0x30); 841 AslError (ASL_ERROR, ASL_MSG_LOCAL_INIT, Op, LocalName); 842 } 843 break; 844 845 846 case PARSEOP_ARG0: 847 case PARSEOP_ARG1: 848 case PARSEOP_ARG2: 849 case PARSEOP_ARG3: 850 case PARSEOP_ARG4: 851 case PARSEOP_ARG5: 852 case PARSEOP_ARG6: 853 854 if (!MethodInfo) 855 { 856 /* 857 * Arg was used outside a control method, or there was an error 858 * in the method declaration. 859 */ 860 AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName); 861 return (AE_ERROR); 862 } 863 864 RegisterNumber = (Op->Asl.AmlOpcode & 0x000F) - 8; 865 ArgName[strlen (ArgName) -1] = (char) (RegisterNumber + 0x30); 866 867 /* 868 * If the Arg is being used as a target, mark the local 869 * initialized 870 */ 871 if (Op->Asl.CompileFlags & NODE_IS_TARGET) 872 { 873 MethodInfo->ArgInitialized[RegisterNumber] = TRUE; 874 } 875 876 /* 877 * Otherwise, this is a reference, check if the Arg 878 * has been previously initialized. 879 * 880 * The only operator that accepts an uninitialized value is ObjectType() 881 */ 882 else if ((!MethodInfo->ArgInitialized[RegisterNumber]) && 883 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE)) 884 { 885 AslError (ASL_ERROR, ASL_MSG_ARG_INIT, Op, ArgName); 886 } 887 888 /* Flag this arg if it is not a "real" argument to the method */ 889 890 if (RegisterNumber >= MethodInfo->NumArguments) 891 { 892 AslError (ASL_REMARK, ASL_MSG_NOT_PARAMETER, Op, ArgName); 893 } 894 break; 895 896 897 case PARSEOP_RETURN: 898 899 if (!MethodInfo) 900 { 901 /* 902 * Probably was an error in the method declaration, 903 * no additional error here 904 */ 905 ACPI_WARNING ((AE_INFO, "%p, No parent method", Op)); 906 return (AE_ERROR); 907 } 908 909 /* Child indicates a return value */ 910 911 if ((Op->Asl.Child) && 912 (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)) 913 { 914 MethodInfo->NumReturnWithValue++; 915 } 916 else 917 { 918 MethodInfo->NumReturnNoValue++; 919 } 920 break; 921 922 923 case PARSEOP_BREAK: 924 case PARSEOP_CONTINUE: 925 926 Next = Op->Asl.Parent; 927 while (Next) 928 { 929 if (Next->Asl.ParseOpcode == PARSEOP_WHILE) 930 { 931 break; 932 } 933 Next = Next->Asl.Parent; 934 } 935 936 if (!Next) 937 { 938 AslError (ASL_ERROR, ASL_MSG_NO_WHILE, Op, NULL); 939 } 940 break; 941 942 943 case PARSEOP_STALL: 944 945 /* We can range check if the argument is an integer */ 946 947 if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_INTEGER) && 948 (Op->Asl.Child->Asl.Value.Integer > ACPI_UINT8_MAX)) 949 { 950 AslError (ASL_ERROR, ASL_MSG_INVALID_TIME, Op, NULL); 951 } 952 break; 953 954 955 case PARSEOP_DEVICE: 956 case PARSEOP_EVENT: 957 case PARSEOP_MUTEX: 958 case PARSEOP_OPERATIONREGION: 959 case PARSEOP_POWERRESOURCE: 960 case PARSEOP_PROCESSOR: 961 case PARSEOP_THERMALZONE: 962 963 /* 964 * The first operand is a name to be created in the namespace. 965 * Check against the reserved list. 966 */ 967 i = ApCheckForPredefinedName (Op, Op->Asl.NameSeg); 968 if (i < ACPI_VALID_RESERVED_NAME_MAX) 969 { 970 AslError (ASL_ERROR, ASL_MSG_RESERVED_USE, Op, Op->Asl.ExternalName); 971 } 972 break; 973 974 975 case PARSEOP_NAME: 976 977 /* Typecheck any predefined names statically defined with Name() */ 978 979 ApCheckForPredefinedObject (Op, Op->Asl.NameSeg); 980 981 /* Special typechecking for _HID */ 982 983 if (!ACPI_STRCMP (METHOD_NAME__HID, Op->Asl.NameSeg)) 984 { 985 Next = Op->Asl.Child->Asl.Next; 986 if (Next->Asl.ParseOpcode == PARSEOP_STRING_LITERAL) 987 { 988 /* 989 * _HID is a string, all characters must be alphanumeric. 990 * One of the things we want to catch here is the use of 991 * a leading asterisk in the string. 992 */ 993 for (i = 0; Next->Asl.Value.String[i]; i++) 994 { 995 if (!isalnum ((int) Next->Asl.Value.String[i])) 996 { 997 AslError (ASL_ERROR, ASL_MSG_ALPHANUMERIC_STRING, 998 Next, Next->Asl.Value.String); 999 break; 1000 } 1001 } 1002 } 1003 } 1004 break; 1005 1006 1007 default: 1008 break; 1009 } 1010 1011 return AE_OK; 1012 } 1013 1014 1015 /******************************************************************************* 1016 * 1017 * FUNCTION: AnLastStatementIsReturn 1018 * 1019 * PARAMETERS: Op - A method parse node 1020 * 1021 * RETURN: TRUE if last statement is an ASL RETURN. False otherwise 1022 * 1023 * DESCRIPTION: Walk down the list of top level statements within a method 1024 * to find the last one. Check if that last statement is in 1025 * fact a RETURN statement. 1026 * 1027 ******************************************************************************/ 1028 1029 static BOOLEAN 1030 AnLastStatementIsReturn ( 1031 ACPI_PARSE_OBJECT *Op) 1032 { 1033 ACPI_PARSE_OBJECT *Next; 1034 1035 1036 /* 1037 * Check if last statement is a return 1038 */ 1039 Next = ASL_GET_CHILD_NODE (Op); 1040 while (Next) 1041 { 1042 if ((!Next->Asl.Next) && 1043 (Next->Asl.ParseOpcode == PARSEOP_RETURN)) 1044 { 1045 return TRUE; 1046 } 1047 1048 Next = ASL_GET_PEER_NODE (Next); 1049 } 1050 1051 return FALSE; 1052 } 1053 1054 1055 /******************************************************************************* 1056 * 1057 * FUNCTION: AnMethodAnalysisWalkEnd 1058 * 1059 * PARAMETERS: ASL_WALK_CALLBACK 1060 * 1061 * RETURN: Status 1062 * 1063 * DESCRIPTION: Ascending callback for analysis walk. Complete method 1064 * return analysis. 1065 * 1066 ******************************************************************************/ 1067 1068 ACPI_STATUS 1069 AnMethodAnalysisWalkEnd ( 1070 ACPI_PARSE_OBJECT *Op, 1071 UINT32 Level, 1072 void *Context) 1073 { 1074 ASL_ANALYSIS_WALK_INFO *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context; 1075 ASL_METHOD_INFO *MethodInfo = WalkInfo->MethodStack; 1076 1077 1078 switch (Op->Asl.ParseOpcode) 1079 { 1080 case PARSEOP_METHOD: 1081 case PARSEOP_RETURN: 1082 if (!MethodInfo) 1083 { 1084 printf ("No method info for method! [%s]\n", Op->Asl.Namepath); 1085 AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op, 1086 "No method info for this method"); 1087 CmCleanupAndExit (); 1088 return (AE_AML_INTERNAL); 1089 } 1090 break; 1091 1092 default: 1093 break; 1094 } 1095 1096 switch (Op->Asl.ParseOpcode) 1097 { 1098 case PARSEOP_METHOD: 1099 1100 WalkInfo->MethodStack = MethodInfo->Next; 1101 1102 /* 1103 * Check if there is no return statement at the end of the 1104 * method AND we can actually get there -- i.e., the execution 1105 * of the method can possibly terminate without a return statement. 1106 */ 1107 if ((!AnLastStatementIsReturn (Op)) && 1108 (!(Op->Asl.CompileFlags & NODE_HAS_NO_EXIT))) 1109 { 1110 /* 1111 * No return statement, and execution can possibly exit 1112 * via this path. This is equivalent to Return () 1113 */ 1114 MethodInfo->NumReturnNoValue++; 1115 } 1116 1117 /* 1118 * Check for case where some return statements have a return value 1119 * and some do not. Exit without a return statement is a return with 1120 * no value 1121 */ 1122 if (MethodInfo->NumReturnNoValue && 1123 MethodInfo->NumReturnWithValue) 1124 { 1125 AslError (ASL_WARNING, ASL_MSG_RETURN_TYPES, Op, 1126 Op->Asl.ExternalName); 1127 } 1128 1129 /* 1130 * If there are any RETURN() statements with no value, or there is a 1131 * control path that allows the method to exit without a return value, 1132 * we mark the method as a method that does not return a value. This 1133 * knowledge can be used to check method invocations that expect a 1134 * returned value. 1135 */ 1136 if (MethodInfo->NumReturnNoValue) 1137 { 1138 if (MethodInfo->NumReturnWithValue) 1139 { 1140 Op->Asl.CompileFlags |= NODE_METHOD_SOME_NO_RETVAL; 1141 } 1142 else 1143 { 1144 Op->Asl.CompileFlags |= NODE_METHOD_NO_RETVAL; 1145 } 1146 } 1147 1148 /* 1149 * Check predefined method names for correct return behavior 1150 * and correct number of arguments 1151 */ 1152 ApCheckForPredefinedMethod (Op, MethodInfo); 1153 ACPI_FREE (MethodInfo); 1154 break; 1155 1156 1157 case PARSEOP_RETURN: 1158 1159 /* 1160 * If the parent is a predefined method name, attempt to typecheck 1161 * the return value. Only static types can be validated. 1162 */ 1163 ApCheckPredefinedReturnValue (Op, MethodInfo); 1164 1165 /* 1166 * The parent block does not "exit" and continue execution -- the 1167 * method is terminated here with the Return() statement. 1168 */ 1169 Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT; 1170 1171 /* Used in the "typing" pass later */ 1172 1173 Op->Asl.ParentMethod = MethodInfo->Op; 1174 1175 /* 1176 * If there is a peer node after the return statement, then this 1177 * node is unreachable code -- i.e., it won't be executed because of 1178 * the preceeding Return() statement. 1179 */ 1180 if (Op->Asl.Next) 1181 { 1182 AslError (ASL_WARNING, ASL_MSG_UNREACHABLE_CODE, Op->Asl.Next, NULL); 1183 } 1184 break; 1185 1186 1187 case PARSEOP_IF: 1188 1189 if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) && 1190 (Op->Asl.Next) && 1191 (Op->Asl.Next->Asl.ParseOpcode == PARSEOP_ELSE)) 1192 { 1193 /* 1194 * This IF has a corresponding ELSE. The IF block has no exit, 1195 * (it contains an unconditional Return) 1196 * mark the ELSE block to remember this fact. 1197 */ 1198 Op->Asl.Next->Asl.CompileFlags |= NODE_IF_HAS_NO_EXIT; 1199 } 1200 break; 1201 1202 1203 case PARSEOP_ELSE: 1204 1205 if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) && 1206 (Op->Asl.CompileFlags & NODE_IF_HAS_NO_EXIT)) 1207 { 1208 /* 1209 * This ELSE block has no exit and the corresponding IF block 1210 * has no exit either. Therefore, the parent node has no exit. 1211 */ 1212 Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT; 1213 } 1214 break; 1215 1216 1217 default: 1218 1219 if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) && 1220 (Op->Asl.Parent)) 1221 { 1222 /* If this node has no exit, then the parent has no exit either */ 1223 1224 Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT; 1225 } 1226 break; 1227 } 1228 1229 return AE_OK; 1230 } 1231 1232 1233 /******************************************************************************* 1234 * 1235 * FUNCTION: AnMethodTypingWalkBegin 1236 * 1237 * PARAMETERS: ASL_WALK_CALLBACK 1238 * 1239 * RETURN: Status 1240 * 1241 * DESCRIPTION: Descending callback for the typing walk. 1242 * 1243 ******************************************************************************/ 1244 1245 ACPI_STATUS 1246 AnMethodTypingWalkBegin ( 1247 ACPI_PARSE_OBJECT *Op, 1248 UINT32 Level, 1249 void *Context) 1250 { 1251 1252 return AE_OK; 1253 } 1254 1255 1256 /******************************************************************************* 1257 * 1258 * FUNCTION: AnMethodTypingWalkEnd 1259 * 1260 * PARAMETERS: ASL_WALK_CALLBACK 1261 * 1262 * RETURN: Status 1263 * 1264 * DESCRIPTION: Ascending callback for typing walk. Complete the method 1265 * return analysis. Check methods for: 1266 * 1) Initialized local variables 1267 * 2) Valid arguments 1268 * 3) Return types 1269 * 1270 ******************************************************************************/ 1271 1272 ACPI_STATUS 1273 AnMethodTypingWalkEnd ( 1274 ACPI_PARSE_OBJECT *Op, 1275 UINT32 Level, 1276 void *Context) 1277 { 1278 UINT32 ThisNodeBtype; 1279 1280 1281 switch (Op->Asl.ParseOpcode) 1282 { 1283 case PARSEOP_METHOD: 1284 1285 Op->Asl.CompileFlags |= NODE_METHOD_TYPED; 1286 break; 1287 1288 case PARSEOP_RETURN: 1289 1290 if ((Op->Asl.Child) && 1291 (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)) 1292 { 1293 ThisNodeBtype = AnGetBtype (Op->Asl.Child); 1294 1295 if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_METHODCALL) && 1296 (ThisNodeBtype == (ACPI_UINT32_MAX -1))) 1297 { 1298 /* 1299 * The called method is untyped at this time (typically a 1300 * forward reference). 1301 * 1302 * Check for a recursive method call first. 1303 */ 1304 if (Op->Asl.ParentMethod != Op->Asl.Child->Asl.Node->Op) 1305 { 1306 /* We must type the method here */ 1307 1308 TrWalkParseTree (Op->Asl.Child->Asl.Node->Op, 1309 ASL_WALK_VISIT_TWICE, AnMethodTypingWalkBegin, 1310 AnMethodTypingWalkEnd, NULL); 1311 1312 ThisNodeBtype = AnGetBtype (Op->Asl.Child); 1313 } 1314 } 1315 1316 /* Returns a value, save the value type */ 1317 1318 if (Op->Asl.ParentMethod) 1319 { 1320 Op->Asl.ParentMethod->Asl.AcpiBtype |= ThisNodeBtype; 1321 } 1322 } 1323 break; 1324 1325 default: 1326 break; 1327 } 1328 1329 return AE_OK; 1330 } 1331 1332 1333 /******************************************************************************* 1334 * 1335 * FUNCTION: AnCheckMethodReturnValue 1336 * 1337 * PARAMETERS: Op - Parent 1338 * OpInfo - Parent info 1339 * ArgOp - Method invocation op 1340 * RequiredBtypes - What caller requires 1341 * ThisNodeBtype - What this node returns (if anything) 1342 * 1343 * RETURN: None 1344 * 1345 * DESCRIPTION: Check a method invocation for 1) A return value and if it does 1346 * in fact return a value, 2) check the type of the return value. 1347 * 1348 ******************************************************************************/ 1349 1350 static void 1351 AnCheckMethodReturnValue ( 1352 ACPI_PARSE_OBJECT *Op, 1353 const ACPI_OPCODE_INFO *OpInfo, 1354 ACPI_PARSE_OBJECT *ArgOp, 1355 UINT32 RequiredBtypes, 1356 UINT32 ThisNodeBtype) 1357 { 1358 ACPI_PARSE_OBJECT *OwningOp; 1359 ACPI_NAMESPACE_NODE *Node; 1360 1361 1362 Node = ArgOp->Asl.Node; 1363 1364 1365 /* Examine the parent op of this method */ 1366 1367 OwningOp = Node->Op; 1368 if (OwningOp->Asl.CompileFlags & NODE_METHOD_NO_RETVAL) 1369 { 1370 /* Method NEVER returns a value */ 1371 1372 AslError (ASL_ERROR, ASL_MSG_NO_RETVAL, Op, Op->Asl.ExternalName); 1373 } 1374 else if (OwningOp->Asl.CompileFlags & NODE_METHOD_SOME_NO_RETVAL) 1375 { 1376 /* Method SOMETIMES returns a value, SOMETIMES not */ 1377 1378 AslError (ASL_WARNING, ASL_MSG_SOME_NO_RETVAL, Op, Op->Asl.ExternalName); 1379 } 1380 else if (!(ThisNodeBtype & RequiredBtypes)) 1381 { 1382 /* Method returns a value, but the type is wrong */ 1383 1384 AnFormatBtype (StringBuffer, ThisNodeBtype); 1385 AnFormatBtype (StringBuffer2, RequiredBtypes); 1386 1387 1388 /* 1389 * The case where the method does not return any value at all 1390 * was already handled in the namespace cross reference 1391 * -- Only issue an error if the method in fact returns a value, 1392 * but it is of the wrong type 1393 */ 1394 if (ThisNodeBtype != 0) 1395 { 1396 sprintf (MsgBuffer, 1397 "Method returns [%s], %s operator requires [%s]", 1398 StringBuffer, OpInfo->Name, StringBuffer2); 1399 1400 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer); 1401 } 1402 } 1403 } 1404 1405 1406 /******************************************************************************* 1407 * 1408 * FUNCTION: AnOperandTypecheckWalkBegin 1409 * 1410 * PARAMETERS: ASL_WALK_CALLBACK 1411 * 1412 * RETURN: Status 1413 * 1414 * DESCRIPTION: Descending callback for the analysis walk. Check methods for: 1415 * 1) Initialized local variables 1416 * 2) Valid arguments 1417 * 3) Return types 1418 * 1419 ******************************************************************************/ 1420 1421 ACPI_STATUS 1422 AnOperandTypecheckWalkBegin ( 1423 ACPI_PARSE_OBJECT *Op, 1424 UINT32 Level, 1425 void *Context) 1426 { 1427 1428 return AE_OK; 1429 } 1430 1431 1432 /******************************************************************************* 1433 * 1434 * FUNCTION: AnOperandTypecheckWalkEnd 1435 * 1436 * PARAMETERS: ASL_WALK_CALLBACK 1437 * 1438 * RETURN: Status 1439 * 1440 * DESCRIPTION: Ascending callback for analysis walk. Complete method 1441 * return analysis. 1442 * 1443 ******************************************************************************/ 1444 1445 ACPI_STATUS 1446 AnOperandTypecheckWalkEnd ( 1447 ACPI_PARSE_OBJECT *Op, 1448 UINT32 Level, 1449 void *Context) 1450 { 1451 const ACPI_OPCODE_INFO *OpInfo; 1452 UINT32 RuntimeArgTypes; 1453 UINT32 RuntimeArgTypes2; 1454 UINT32 RequiredBtypes; 1455 UINT32 ThisNodeBtype; 1456 UINT32 CommonBtypes; 1457 UINT32 OpcodeClass; 1458 ACPI_PARSE_OBJECT *ArgOp; 1459 UINT32 ArgType; 1460 1461 1462 switch (Op->Asl.AmlOpcode) 1463 { 1464 case AML_RAW_DATA_BYTE: 1465 case AML_RAW_DATA_WORD: 1466 case AML_RAW_DATA_DWORD: 1467 case AML_RAW_DATA_QWORD: 1468 case AML_RAW_DATA_BUFFER: 1469 case AML_RAW_DATA_CHAIN: 1470 case AML_PACKAGE_LENGTH: 1471 case AML_UNASSIGNED_OPCODE: 1472 case AML_DEFAULT_ARG_OP: 1473 1474 /* Ignore the internal (compiler-only) AML opcodes */ 1475 1476 return (AE_OK); 1477 1478 default: 1479 break; 1480 } 1481 1482 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 1483 if (!OpInfo) 1484 { 1485 return (AE_OK); 1486 } 1487 1488 ArgOp = Op->Asl.Child; 1489 RuntimeArgTypes = OpInfo->RuntimeArgs; 1490 OpcodeClass = OpInfo->Class; 1491 1492 #ifdef ASL_ERROR_NAMED_OBJECT_IN_WHILE 1493 /* 1494 * Update 11/2008: In practice, we can't perform this check. A simple 1495 * analysis is not sufficient. Also, it can cause errors when compiling 1496 * disassembled code because of the way Switch operators are implemented 1497 * (a While(One) loop with a named temp variable created within.) 1498 */ 1499 1500 /* 1501 * If we are creating a named object, check if we are within a while loop 1502 * by checking if the parent is a WHILE op. This is a simple analysis, but 1503 * probably sufficient for many cases. 1504 * 1505 * Allow Scope(), Buffer(), and Package(). 1506 */ 1507 if (((OpcodeClass == AML_CLASS_NAMED_OBJECT) && (Op->Asl.AmlOpcode != AML_SCOPE_OP)) || 1508 ((OpcodeClass == AML_CLASS_CREATE) && (OpInfo->Flags & AML_NSNODE))) 1509 { 1510 if (Op->Asl.Parent->Asl.AmlOpcode == AML_WHILE_OP) 1511 { 1512 AslError (ASL_ERROR, ASL_MSG_NAMED_OBJECT_IN_WHILE, Op, NULL); 1513 } 1514 } 1515 #endif 1516 1517 /* 1518 * Special case for control opcodes IF/RETURN/WHILE since they 1519 * have no runtime arg list (at this time) 1520 */ 1521 switch (Op->Asl.AmlOpcode) 1522 { 1523 case AML_IF_OP: 1524 case AML_WHILE_OP: 1525 case AML_RETURN_OP: 1526 1527 if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) 1528 { 1529 /* Check for an internal method */ 1530 1531 if (AnIsInternalMethod (ArgOp)) 1532 { 1533 return (AE_OK); 1534 } 1535 1536 /* The lone arg is a method call, check it */ 1537 1538 RequiredBtypes = AnMapArgTypeToBtype (ARGI_INTEGER); 1539 if (Op->Asl.AmlOpcode == AML_RETURN_OP) 1540 { 1541 RequiredBtypes = 0xFFFFFFFF; 1542 } 1543 1544 ThisNodeBtype = AnGetBtype (ArgOp); 1545 if (ThisNodeBtype == ACPI_UINT32_MAX) 1546 { 1547 return (AE_OK); 1548 } 1549 AnCheckMethodReturnValue (Op, OpInfo, ArgOp, 1550 RequiredBtypes, ThisNodeBtype); 1551 } 1552 return (AE_OK); 1553 1554 default: 1555 break; 1556 } 1557 1558 /* Ignore the non-executable opcodes */ 1559 1560 if (RuntimeArgTypes == ARGI_INVALID_OPCODE) 1561 { 1562 return (AE_OK); 1563 } 1564 1565 switch (OpcodeClass) 1566 { 1567 case AML_CLASS_EXECUTE: 1568 case AML_CLASS_CREATE: 1569 case AML_CLASS_CONTROL: 1570 case AML_CLASS_RETURN_VALUE: 1571 1572 /* TBD: Change class or fix typechecking for these */ 1573 1574 if ((Op->Asl.AmlOpcode == AML_BUFFER_OP) || 1575 (Op->Asl.AmlOpcode == AML_PACKAGE_OP) || 1576 (Op->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)) 1577 { 1578 break; 1579 } 1580 1581 /* Reverse the runtime argument list */ 1582 1583 RuntimeArgTypes2 = 0; 1584 while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes))) 1585 { 1586 RuntimeArgTypes2 <<= ARG_TYPE_WIDTH; 1587 RuntimeArgTypes2 |= ArgType; 1588 INCREMENT_ARG_LIST (RuntimeArgTypes); 1589 } 1590 1591 while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes2))) 1592 { 1593 RequiredBtypes = AnMapArgTypeToBtype (ArgType); 1594 1595 ThisNodeBtype = AnGetBtype (ArgOp); 1596 if (ThisNodeBtype == ACPI_UINT32_MAX) 1597 { 1598 goto NextArgument; 1599 } 1600 1601 /* Examine the arg based on the required type of the arg */ 1602 1603 switch (ArgType) 1604 { 1605 case ARGI_TARGETREF: 1606 1607 if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO) 1608 { 1609 /* ZERO is the placeholder for "don't store result" */ 1610 1611 ThisNodeBtype = RequiredBtypes; 1612 break; 1613 } 1614 1615 if (ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER) 1616 { 1617 /* 1618 * This is the case where an original reference to a resource 1619 * descriptor field has been replaced by an (Integer) offset. 1620 * These named fields are supported at compile-time only; 1621 * the names are not passed to the interpreter (via the AML). 1622 */ 1623 if ((ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) || 1624 (ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE)) 1625 { 1626 AslError (ASL_ERROR, ASL_MSG_RESOURCE_FIELD, ArgOp, NULL); 1627 } 1628 else 1629 { 1630 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, NULL); 1631 } 1632 break; 1633 } 1634 1635 if ((ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) || 1636 (ArgOp->Asl.ParseOpcode == PARSEOP_DEREFOF)) 1637 { 1638 break; 1639 } 1640 1641 ThisNodeBtype = RequiredBtypes; 1642 break; 1643 1644 1645 case ARGI_REFERENCE: /* References */ 1646 case ARGI_INTEGER_REF: 1647 case ARGI_OBJECT_REF: 1648 case ARGI_DEVICE_REF: 1649 1650 switch (ArgOp->Asl.ParseOpcode) 1651 { 1652 case PARSEOP_LOCAL0: 1653 case PARSEOP_LOCAL1: 1654 case PARSEOP_LOCAL2: 1655 case PARSEOP_LOCAL3: 1656 case PARSEOP_LOCAL4: 1657 case PARSEOP_LOCAL5: 1658 case PARSEOP_LOCAL6: 1659 case PARSEOP_LOCAL7: 1660 1661 /* TBD: implement analysis of current value (type) of the local */ 1662 /* For now, just treat any local as a typematch */ 1663 1664 /*ThisNodeBtype = RequiredBtypes;*/ 1665 break; 1666 1667 case PARSEOP_ARG0: 1668 case PARSEOP_ARG1: 1669 case PARSEOP_ARG2: 1670 case PARSEOP_ARG3: 1671 case PARSEOP_ARG4: 1672 case PARSEOP_ARG5: 1673 case PARSEOP_ARG6: 1674 1675 /* Hard to analyze argument types, sow we won't */ 1676 /* For now, just treat any arg as a typematch */ 1677 1678 /* ThisNodeBtype = RequiredBtypes; */ 1679 break; 1680 1681 case PARSEOP_DEBUG: 1682 break; 1683 1684 case PARSEOP_REFOF: 1685 case PARSEOP_INDEX: 1686 default: 1687 break; 1688 1689 } 1690 break; 1691 1692 case ARGI_INTEGER: 1693 default: 1694 break; 1695 } 1696 1697 1698 CommonBtypes = ThisNodeBtype & RequiredBtypes; 1699 1700 if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) 1701 { 1702 if (AnIsInternalMethod (ArgOp)) 1703 { 1704 return (AE_OK); 1705 } 1706 1707 /* Check a method call for a valid return value */ 1708 1709 AnCheckMethodReturnValue (Op, OpInfo, ArgOp, 1710 RequiredBtypes, ThisNodeBtype); 1711 } 1712 1713 /* 1714 * Now check if the actual type(s) match at least one 1715 * bit to the required type 1716 */ 1717 else if (!CommonBtypes) 1718 { 1719 /* No match -- this is a type mismatch error */ 1720 1721 AnFormatBtype (StringBuffer, ThisNodeBtype); 1722 AnFormatBtype (StringBuffer2, RequiredBtypes); 1723 1724 sprintf (MsgBuffer, "[%s] found, %s operator requires [%s]", 1725 StringBuffer, OpInfo->Name, StringBuffer2); 1726 1727 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer); 1728 } 1729 1730 NextArgument: 1731 ArgOp = ArgOp->Asl.Next; 1732 INCREMENT_ARG_LIST (RuntimeArgTypes2); 1733 } 1734 break; 1735 1736 default: 1737 break; 1738 } 1739 1740 return (AE_OK); 1741 } 1742 1743 1744 /******************************************************************************* 1745 * 1746 * FUNCTION: AnIsResultUsed 1747 * 1748 * PARAMETERS: Op - Parent op for the operator 1749 * 1750 * RETURN: TRUE if result from this operation is actually consumed 1751 * 1752 * DESCRIPTION: Determine if the function result value from an operator is 1753 * used. 1754 * 1755 ******************************************************************************/ 1756 1757 BOOLEAN 1758 AnIsResultUsed ( 1759 ACPI_PARSE_OBJECT *Op) 1760 { 1761 ACPI_PARSE_OBJECT *Parent; 1762 1763 1764 switch (Op->Asl.ParseOpcode) 1765 { 1766 case PARSEOP_INCREMENT: 1767 case PARSEOP_DECREMENT: 1768 1769 /* These are standalone operators, no return value */ 1770 1771 return (TRUE); 1772 1773 default: 1774 break; 1775 } 1776 1777 /* Examine parent to determine if the return value is used */ 1778 1779 Parent = Op->Asl.Parent; 1780 switch (Parent->Asl.ParseOpcode) 1781 { 1782 /* If/While - check if the operator is the predicate */ 1783 1784 case PARSEOP_IF: 1785 case PARSEOP_WHILE: 1786 1787 /* First child is the predicate */ 1788 1789 if (Parent->Asl.Child == Op) 1790 { 1791 return (TRUE); 1792 } 1793 return (FALSE); 1794 1795 /* Not used if one of these is the parent */ 1796 1797 case PARSEOP_METHOD: 1798 case PARSEOP_DEFINITIONBLOCK: 1799 case PARSEOP_ELSE: 1800 1801 return (FALSE); 1802 1803 default: 1804 /* Any other type of parent means that the result is used */ 1805 1806 return (TRUE); 1807 } 1808 } 1809 1810 1811 /******************************************************************************* 1812 * 1813 * FUNCTION: AnOtherSemanticAnalysisWalkBegin 1814 * 1815 * PARAMETERS: ASL_WALK_CALLBACK 1816 * 1817 * RETURN: Status 1818 * 1819 * DESCRIPTION: Descending callback for the analysis walk. Checks for 1820 * miscellaneous issues in the code. 1821 * 1822 ******************************************************************************/ 1823 1824 ACPI_STATUS 1825 AnOtherSemanticAnalysisWalkBegin ( 1826 ACPI_PARSE_OBJECT *Op, 1827 UINT32 Level, 1828 void *Context) 1829 { 1830 ACPI_PARSE_OBJECT *ArgNode; 1831 ACPI_PARSE_OBJECT *PrevArgNode = NULL; 1832 const ACPI_OPCODE_INFO *OpInfo; 1833 1834 1835 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 1836 1837 /* 1838 * Determine if an execution class operator actually does something by 1839 * checking if it has a target and/or the function return value is used. 1840 * (Target is optional, so a standalone statement can actually do nothing.) 1841 */ 1842 if ((OpInfo->Class == AML_CLASS_EXECUTE) && 1843 (OpInfo->Flags & AML_HAS_RETVAL) && 1844 (!AnIsResultUsed (Op))) 1845 { 1846 if (OpInfo->Flags & AML_HAS_TARGET) 1847 { 1848 /* 1849 * Find the target node, it is always the last child. If the traget 1850 * is not specified in the ASL, a default node of type Zero was 1851 * created by the parser. 1852 */ 1853 ArgNode = Op->Asl.Child; 1854 while (ArgNode->Asl.Next) 1855 { 1856 PrevArgNode = ArgNode; 1857 ArgNode = ArgNode->Asl.Next; 1858 } 1859 1860 /* Divide() is the only weird case, it has two targets */ 1861 1862 if (Op->Asl.AmlOpcode == AML_DIVIDE_OP) 1863 { 1864 if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) && 1865 (PrevArgNode->Asl.ParseOpcode == PARSEOP_ZERO)) 1866 { 1867 AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, Op, Op->Asl.ExternalName); 1868 } 1869 } 1870 else if (ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) 1871 { 1872 AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, Op, Op->Asl.ExternalName); 1873 } 1874 } 1875 else 1876 { 1877 /* 1878 * Has no target and the result is not used. Only a couple opcodes 1879 * can have this combination. 1880 */ 1881 switch (Op->Asl.ParseOpcode) 1882 { 1883 case PARSEOP_ACQUIRE: 1884 case PARSEOP_WAIT: 1885 case PARSEOP_LOADTABLE: 1886 break; 1887 1888 default: 1889 AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, Op, Op->Asl.ExternalName); 1890 break; 1891 } 1892 } 1893 } 1894 1895 1896 /* 1897 * Semantic checks for individual ASL operators 1898 */ 1899 switch (Op->Asl.ParseOpcode) 1900 { 1901 case PARSEOP_ACQUIRE: 1902 case PARSEOP_WAIT: 1903 /* 1904 * Emit a warning if the timeout parameter for these operators is not 1905 * ACPI_WAIT_FOREVER, and the result value from the operator is not 1906 * checked, meaning that a timeout could happen, but the code 1907 * would not know about it. 1908 */ 1909 1910 /* First child is the namepath, 2nd child is timeout */ 1911 1912 ArgNode = Op->Asl.Child; 1913 ArgNode = ArgNode->Asl.Next; 1914 1915 /* 1916 * Check for the WAIT_FOREVER case - defined by the ACPI spec to be 1917 * 0xFFFF or greater 1918 */ 1919 if (((ArgNode->Asl.ParseOpcode == PARSEOP_WORDCONST) || 1920 (ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER)) && 1921 (ArgNode->Asl.Value.Integer >= (UINT64) ACPI_WAIT_FOREVER)) 1922 { 1923 break; 1924 } 1925 1926 /* 1927 * The operation could timeout. If the return value is not used 1928 * (indicates timeout occurred), issue a warning 1929 */ 1930 if (!AnIsResultUsed (Op)) 1931 { 1932 AslError (ASL_WARNING, ASL_MSG_TIMEOUT, ArgNode, Op->Asl.ExternalName); 1933 } 1934 break; 1935 1936 case PARSEOP_CREATEFIELD: 1937 /* 1938 * Check for a zero Length (NumBits) operand. NumBits is the 3rd operand 1939 */ 1940 ArgNode = Op->Asl.Child; 1941 ArgNode = ArgNode->Asl.Next; 1942 ArgNode = ArgNode->Asl.Next; 1943 1944 if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) || 1945 ((ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER) && 1946 (ArgNode->Asl.Value.Integer == 0))) 1947 { 1948 AslError (ASL_ERROR, ASL_MSG_NON_ZERO, ArgNode, NULL); 1949 } 1950 break; 1951 1952 default: 1953 break; 1954 } 1955 1956 return AE_OK; 1957 } 1958 1959 1960 /******************************************************************************* 1961 * 1962 * FUNCTION: AnOtherSemanticAnalysisWalkEnd 1963 * 1964 * PARAMETERS: ASL_WALK_CALLBACK 1965 * 1966 * RETURN: Status 1967 * 1968 * DESCRIPTION: Ascending callback for analysis walk. Complete method 1969 * return analysis. 1970 * 1971 ******************************************************************************/ 1972 1973 ACPI_STATUS 1974 AnOtherSemanticAnalysisWalkEnd ( 1975 ACPI_PARSE_OBJECT *Op, 1976 UINT32 Level, 1977 void *Context) 1978 { 1979 1980 return AE_OK; 1981 1982 } 1983 1984 1985 #ifdef ACPI_OBSOLETE_FUNCTIONS 1986 /******************************************************************************* 1987 * 1988 * FUNCTION: AnMapBtypeToEtype 1989 * 1990 * PARAMETERS: Btype - Bitfield of ACPI types 1991 * 1992 * RETURN: The Etype corresponding the the Btype 1993 * 1994 * DESCRIPTION: Convert a bitfield type to an encoded type 1995 * 1996 ******************************************************************************/ 1997 1998 UINT32 1999 AnMapBtypeToEtype ( 2000 UINT32 Btype) 2001 { 2002 UINT32 i; 2003 UINT32 Etype; 2004 2005 2006 if (Btype == 0) 2007 { 2008 return 0; 2009 } 2010 2011 Etype = 1; 2012 for (i = 1; i < Btype; i *= 2) 2013 { 2014 Etype++; 2015 } 2016 2017 return (Etype); 2018 } 2019 #endif 2020 2021
Indexes created Sat Sep 27 14:09:57 GMT 2025