1 /****************************************************************************** 2 * 3 * Module Name: aslxref - Namespace cross-reference 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2020, 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 <contrib/dev/acpica/compiler/aslcompiler.h> 153 #include "aslcompiler.y.h" 154 #include <contrib/dev/acpica/include/acparser.h> 155 #include <contrib/dev/acpica/include/amlcode.h> 156 #include <contrib/dev/acpica/include/acnamesp.h> 157 #include <contrib/dev/acpica/include/acdispat.h> 158 159 160 #define _COMPONENT ACPI_COMPILER 161 ACPI_MODULE_NAME ("aslxref") 162 163 /* Local prototypes */ 164 165 static ACPI_STATUS 166 XfNamespaceLocateBegin ( 167 ACPI_PARSE_OBJECT *Op, 168 UINT32 Level, 169 void *Context); 170 171 static ACPI_STATUS 172 XfNamespaceLocateEnd ( 173 ACPI_PARSE_OBJECT *Op, 174 UINT32 Level, 175 void *Context); 176 177 static BOOLEAN 178 XfValidateCrossReference ( 179 ACPI_PARSE_OBJECT *Op, 180 const ACPI_OPCODE_INFO *OpInfo, 181 ACPI_NAMESPACE_NODE *Node); 182 183 static BOOLEAN 184 XfObjectExists ( 185 char *Name); 186 187 static ACPI_STATUS 188 XfCompareOneNamespaceObject ( 189 ACPI_HANDLE ObjHandle, 190 UINT32 Level, 191 void *Context, 192 void **ReturnValue); 193 194 static void 195 XfCheckFieldRange ( 196 ACPI_PARSE_OBJECT *Op, 197 UINT32 RegionBitLength, 198 UINT32 FieldBitOffset, 199 UINT32 FieldBitLength, 200 UINT32 AccessBitWidth); 201 202 203 /******************************************************************************* 204 * 205 * FUNCTION: XfCrossReferenceNamespace 206 * 207 * PARAMETERS: None 208 * 209 * RETURN: Status 210 * 211 * DESCRIPTION: Perform a cross reference check of the parse tree against the 212 * namespace. Every named referenced within the parse tree 213 * should be get resolved with a namespace lookup. If not, the 214 * original reference in the ASL code is invalid -- i.e., refers 215 * to a non-existent object. 216 * 217 * NOTE: The ASL "External" operator causes the name to be inserted into the 218 * namespace so that references to the external name will be resolved 219 * correctly here. 220 * 221 ******************************************************************************/ 222 223 ACPI_STATUS 224 XfCrossReferenceNamespace ( 225 void) 226 { 227 ACPI_WALK_STATE *WalkState; 228 229 230 /* 231 * Create a new walk state for use when looking up names 232 * within the namespace (Passed as context to the callbacks) 233 */ 234 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL); 235 if (!WalkState) 236 { 237 return (AE_NO_MEMORY); 238 } 239 240 /* Walk the entire parse tree */ 241 242 TrWalkParseTree (AslGbl_ParseTreeRoot, ASL_WALK_VISIT_TWICE, 243 XfNamespaceLocateBegin, XfNamespaceLocateEnd, WalkState); 244 245 ACPI_FREE (WalkState); 246 return (AE_OK); 247 } 248 249 250 /******************************************************************************* 251 * 252 * FUNCTION: XfObjectExists 253 * 254 * PARAMETERS: Name - 4 char ACPI name 255 * 256 * RETURN: TRUE if name exists in namespace 257 * 258 * DESCRIPTION: Walk the namespace to find an object 259 * 260 ******************************************************************************/ 261 262 static BOOLEAN 263 XfObjectExists ( 264 char *Name) 265 { 266 ACPI_STATUS Status; 267 268 269 /* Walk entire namespace from the supplied root */ 270 271 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 272 ACPI_UINT32_MAX, FALSE, XfCompareOneNamespaceObject, NULL, 273 Name, NULL); 274 if (Status == AE_CTRL_TRUE) 275 { 276 /* At least one instance of the name was found */ 277 278 return (TRUE); 279 } 280 281 return (FALSE); 282 } 283 284 285 /******************************************************************************* 286 * 287 * FUNCTION: XfCompareOneNamespaceObject 288 * 289 * PARAMETERS: ACPI_WALK_CALLBACK 290 * 291 * RETURN: Status 292 * 293 * DESCRIPTION: Compare name of one object. 294 * 295 ******************************************************************************/ 296 297 static ACPI_STATUS 298 XfCompareOneNamespaceObject ( 299 ACPI_HANDLE ObjHandle, 300 UINT32 Level, 301 void *Context, 302 void **ReturnValue) 303 { 304 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 305 306 307 /* Simply check the name */ 308 309 if (*((UINT32 *) (Context)) == Node->Name.Integer) 310 { 311 /* Abort walk if we found one instance */ 312 313 return (AE_CTRL_TRUE); 314 } 315 316 return (AE_OK); 317 } 318 319 320 /******************************************************************************* 321 * 322 * FUNCTION: XfCheckFieldRange 323 * 324 * PARAMETERS: RegionBitLength - Length of entire parent region 325 * FieldBitOffset - Start of the field unit (within region) 326 * FieldBitLength - Entire length of field unit 327 * AccessBitWidth - Access width of the field unit 328 * 329 * RETURN: None 330 * 331 * DESCRIPTION: Check one field unit to make sure it fits in the parent 332 * op region. 333 * 334 * Note: AccessBitWidth must be either 8,16,32, or 64 335 * 336 ******************************************************************************/ 337 338 static void 339 XfCheckFieldRange ( 340 ACPI_PARSE_OBJECT *Op, 341 UINT32 RegionBitLength, 342 UINT32 FieldBitOffset, 343 UINT32 FieldBitLength, 344 UINT32 AccessBitWidth) 345 { 346 UINT32 FieldEndBitOffset; 347 348 349 /* 350 * Check each field unit against the region size. The entire 351 * field unit (start offset plus length) must fit within the 352 * region. 353 */ 354 FieldEndBitOffset = FieldBitOffset + FieldBitLength; 355 356 if (FieldEndBitOffset > RegionBitLength) 357 { 358 /* Field definition itself is beyond the end-of-region */ 359 360 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_OFFSET, Op, NULL); 361 return; 362 } 363 364 /* 365 * Now check that the field plus AccessWidth doesn't go beyond 366 * the end-of-region. Assumes AccessBitWidth is a power of 2 367 */ 368 FieldEndBitOffset = ACPI_ROUND_UP (FieldEndBitOffset, AccessBitWidth); 369 370 if (FieldEndBitOffset > RegionBitLength) 371 { 372 /* Field definition combined with the access is beyond EOR */ 373 374 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_ACCESS_WIDTH, Op, NULL); 375 } 376 } 377 378 379 /******************************************************************************* 380 * 381 * FUNCTION: XfNamespaceLocateBegin 382 * 383 * PARAMETERS: ASL_WALK_CALLBACK 384 * 385 * RETURN: Status 386 * 387 * DESCRIPTION: Descending callback used during cross-reference. For named 388 * object references, attempt to locate the name in the 389 * namespace. 390 * 391 * NOTE: ASL references to named fields within resource descriptors are 392 * resolved to integer values here. Therefore, this step is an 393 * important part of the code generation. We don't know that the 394 * name refers to a resource descriptor until now. 395 * 396 ******************************************************************************/ 397 398 static ACPI_STATUS 399 XfNamespaceLocateBegin ( 400 ACPI_PARSE_OBJECT *Op, 401 UINT32 Level, 402 void *Context) 403 { 404 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 405 ACPI_NAMESPACE_NODE *Node; 406 ACPI_STATUS Status; 407 ACPI_OBJECT_TYPE ObjectType; 408 char *Path; 409 UINT8 PassedArgs; 410 ACPI_PARSE_OBJECT *NextOp; 411 ACPI_PARSE_OBJECT *OwningOp; 412 ACPI_PARSE_OBJECT *SpaceIdOp; 413 UINT32 MinimumLength; 414 UINT32 Offset; 415 UINT32 FieldBitLength; 416 UINT32 TagBitLength; 417 UINT8 Message = 0; 418 const ACPI_OPCODE_INFO *OpInfo; 419 UINT32 Flags; 420 ASL_METHOD_LOCAL *MethodLocals = NULL; 421 ASL_METHOD_LOCAL *MethodArgs = NULL; 422 int RegisterNumber; 423 UINT32 i; 424 ACPI_NAMESPACE_NODE *DeclarationParentMethod; 425 ACPI_PARSE_OBJECT *ReferenceParentMethod; 426 427 428 ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op); 429 430 431 if ((Op->Asl.AmlOpcode == AML_METHOD_OP) && Op->Asl.Node) 432 { 433 Node = Op->Asl.Node; 434 435 /* Support for method LocalX/ArgX analysis */ 436 437 if (!Node->MethodLocals) 438 { 439 /* Create local/arg info blocks */ 440 441 MethodLocals = UtLocalCalloc ( 442 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_LOCALS); 443 Node->MethodLocals = MethodLocals; 444 445 MethodArgs = UtLocalCalloc ( 446 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_ARGS); 447 Node->MethodArgs = MethodArgs; 448 449 /* 450 * Get the method argument count 451 * First, get the name node 452 */ 453 NextOp = Op->Asl.Child; 454 455 /* Get the NumArguments node */ 456 457 NextOp = NextOp->Asl.Next; 458 Node->ArgCount = (UINT8) 459 (((UINT8) NextOp->Asl.Value.Integer) & 0x07); 460 461 /* We will track all possible ArgXs */ 462 463 for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) 464 { 465 if (i < Node->ArgCount) 466 { 467 /* Real Args are always "initialized" */ 468 469 MethodArgs[i].Flags = ASL_ARG_INITIALIZED; 470 } 471 else 472 { 473 /* Other ArgXs can be used as locals */ 474 475 MethodArgs[i].Flags = ASL_ARG_IS_LOCAL; 476 } 477 478 MethodArgs[i].Op = Op; 479 } 480 } 481 } 482 483 /* 484 * If this node is the actual declaration of a name 485 * [such as the XXXX name in "Method (XXXX)"], 486 * we are not interested in it here. We only care about names that are 487 * references to other objects within the namespace and the parent objects 488 * of name declarations 489 */ 490 if (Op->Asl.CompileFlags & OP_IS_NAME_DECLARATION) 491 { 492 return_ACPI_STATUS (AE_OK); 493 } 494 495 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 496 497 /* Check method LocalX variables */ 498 499 if (OpInfo->Type == AML_TYPE_LOCAL_VARIABLE) 500 { 501 /* Find parent method Op */ 502 503 NextOp = UtGetParentMethodOp (Op); 504 if (!NextOp) 505 { 506 return_ACPI_STATUS (AE_OK); 507 } 508 509 /* Get method node */ 510 511 Node = NextOp->Asl.Node; 512 513 RegisterNumber = Op->Asl.AmlOpcode & 0x0007; /* 0x60 through 0x67 */ 514 MethodLocals = Node->MethodLocals; 515 516 if (Op->Asl.CompileFlags & OP_IS_TARGET) 517 { 518 /* Local is being initialized */ 519 520 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_INITIALIZED; 521 MethodLocals[RegisterNumber].Op = Op; 522 523 return_ACPI_STATUS (AE_OK); 524 } 525 526 /* Mark this Local as referenced */ 527 528 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_REFERENCED; 529 MethodLocals[RegisterNumber].Op = Op; 530 531 return_ACPI_STATUS (AE_OK); 532 } 533 534 /* Check method ArgX variables */ 535 536 if (OpInfo->Type == AML_TYPE_METHOD_ARGUMENT) 537 { 538 /* Find parent method Op */ 539 540 NextOp = UtGetParentMethodOp (Op); 541 if (!NextOp) 542 { 543 return_ACPI_STATUS (AE_OK); 544 } 545 546 /* Get method node */ 547 548 Node = NextOp->Asl.Node; 549 550 /* Get Arg # */ 551 552 RegisterNumber = Op->Asl.AmlOpcode - AML_ARG0; /* 0x68 through 0x6F */ 553 MethodArgs = Node->MethodArgs; 554 555 /* Mark this Arg as referenced */ 556 557 MethodArgs[RegisterNumber].Flags |= ASL_ARG_REFERENCED; 558 MethodArgs[RegisterNumber].Op = Op; 559 560 if (Op->Asl.CompileFlags & OP_IS_TARGET) 561 { 562 /* Arg is being initialized */ 563 564 MethodArgs[RegisterNumber].Flags |= ASL_ARG_INITIALIZED; 565 } 566 567 return_ACPI_STATUS (AE_OK); 568 } 569 570 /* 571 * After method ArgX and LocalX, we are only interested in opcodes 572 * that have an associated name 573 */ 574 if ((!(OpInfo->Flags & AML_NAMED)) && 575 (!(OpInfo->Flags & AML_CREATE)) && 576 (Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) && 577 (Op->Asl.ParseOpcode != PARSEOP_NAMESEG) && 578 (Op->Asl.ParseOpcode != PARSEOP_METHODCALL) && 579 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL)) 580 { 581 return_ACPI_STATUS (AE_OK); 582 } 583 584 /* 585 * One special case: CondRefOf operator - we don't care if the name exists 586 * or not at this point, just ignore it, the point of the operator is to 587 * determine if the name exists at runtime. 588 */ 589 if ((Op->Asl.Parent) && 590 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)) 591 { 592 return_ACPI_STATUS (AE_OK); 593 } 594 595 /* 596 * We must enable the "search-to-root" for single NameSegs, but 597 * we have to be very careful about opening up scopes 598 */ 599 Flags = ACPI_NS_SEARCH_PARENT; 600 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || 601 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || 602 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) || 603 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) 604 { 605 /* 606 * These are name references, do not push the scope stack 607 * for them. 608 */ 609 Flags |= ACPI_NS_DONT_OPEN_SCOPE; 610 } 611 612 /* Get the NamePath from the appropriate place */ 613 614 if (OpInfo->Flags & AML_NAMED) 615 { 616 /* For nearly all NAMED operators, the name reference is the first child */ 617 618 Path = Op->Asl.Child->Asl.Value.String; 619 if (Op->Asl.AmlOpcode == AML_ALIAS_OP) 620 { 621 /* 622 * ALIAS is the only oddball opcode, the name declaration 623 * (alias name) is the second operand 624 */ 625 Path = Op->Asl.Child->Asl.Next->Asl.Value.String; 626 } 627 } 628 else if (OpInfo->Flags & AML_CREATE) 629 { 630 /* Name must appear as the last parameter */ 631 632 NextOp = Op->Asl.Child; 633 while (!(NextOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION)) 634 { 635 NextOp = NextOp->Asl.Next; 636 } 637 638 Path = NextOp->Asl.Value.String; 639 } 640 else 641 { 642 Path = Op->Asl.Value.String; 643 } 644 645 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 646 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 647 "Type=%s\n", AcpiUtGetTypeName (ObjectType))); 648 649 /* 650 * Lookup the name in the namespace. Name must exist at this point, or it 651 * is an invalid reference. 652 * 653 * The namespace is also used as a lookup table for references to resource 654 * descriptors and the fields within them. 655 */ 656 AslGbl_NsLookupCount++; 657 658 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType, 659 ACPI_IMODE_EXECUTE, Flags, WalkState, &Node); 660 if (ACPI_FAILURE (Status)) 661 { 662 if (Status == AE_NOT_FOUND) 663 { 664 /* 665 * We didn't find the name reference by path -- we can qualify this 666 * a little better before we print an error message 667 */ 668 if (strlen (Path) == ACPI_NAMESEG_SIZE) 669 { 670 /* A simple, one-segment ACPI name */ 671 672 if (XfObjectExists (Path)) 673 { 674 /* 675 * There exists such a name, but we couldn't get to it 676 * from this scope 677 */ 678 AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op, 679 Op->Asl.ExternalName); 680 } 681 else 682 { 683 /* The name doesn't exist, period */ 684 685 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, 686 Op, Op->Asl.ExternalName); 687 } 688 } 689 else 690 { 691 /* The NamePath contains multiple NameSegs */ 692 693 if ((OpInfo->Flags & AML_CREATE) || 694 (OpInfo->ObjectType == ACPI_TYPE_LOCAL_ALIAS)) 695 { 696 /* 697 * The new name is the last parameter. For the 698 * CreateXXXXField and Alias operators 699 */ 700 NextOp = Op->Asl.Child; 701 while (!(NextOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION)) 702 { 703 NextOp = NextOp->Asl.Next; 704 } 705 706 AslError (ASL_ERROR, ASL_MSG_PREFIX_NOT_EXIST, NextOp, 707 NextOp->Asl.ExternalName); 708 } 709 else if (OpInfo->Flags & AML_NAMED) 710 { 711 /* The new name is the first parameter */ 712 713 AslError (ASL_ERROR, ASL_MSG_PREFIX_NOT_EXIST, Op, 714 Op->Asl.ExternalName); 715 } 716 else if (Path[0] == AML_ROOT_PREFIX) 717 { 718 /* Full namepath from root, the object does not exist */ 719 720 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op, 721 Op->Asl.ExternalName); 722 } 723 else 724 { 725 /* 726 * Generic "not found" error. Cannot determine whether it 727 * doesn't exist or just can't be reached. However, we 728 * can differentiate between a NameSeg vs. NamePath. 729 */ 730 if (strlen (Op->Asl.ExternalName) == ACPI_NAMESEG_SIZE) 731 { 732 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, 733 Op->Asl.ExternalName); 734 } 735 else 736 { 737 AslError (ASL_ERROR, ASL_MSG_NAMEPATH_NOT_EXIST, Op, 738 Op->Asl.ExternalName); 739 } 740 } 741 } 742 743 Status = AE_OK; 744 } 745 746 return_ACPI_STATUS (Status); 747 } 748 749 /* Check for an attempt to access an object in another method */ 750 751 if (!XfValidateCrossReference (Op, OpInfo, Node)) 752 { 753 AslError (ASL_ERROR, ASL_MSG_TEMPORARY_OBJECT, Op, 754 Op->Asl.ExternalName); 755 return_ACPI_STATUS (Status); 756 } 757 758 /* Object was found above, check for an illegal forward reference */ 759 760 if (Op->Asl.CompileFlags & OP_NOT_FOUND_DURING_LOAD) 761 { 762 /* 763 * During the load phase, this Op was flagged as a possible 764 * illegal forward reference. In other words, Op is a name path or 765 * name segment that refers to a named object declared after the 766 * reference. In this scinario, Node refers to the actual declaration 767 * and Op is a parse node that references the named object. 768 * 769 * Note: 770 * 771 * Object references inside of control methods are allowed to 772 * refer to objects declared outside of control methods. 773 * 774 * If the declaration and reference are both contained inside of the 775 * same method or outside of any method, this is a forward reference 776 * and should be reported as a compiler error. 777 */ 778 DeclarationParentMethod = UtGetParentMethodNode (Node); 779 ReferenceParentMethod = UtGetParentMethodOp (Op); 780 781 /* case 1: declaration and reference are both outside of method */ 782 783 if (!ReferenceParentMethod && !DeclarationParentMethod) 784 { 785 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op, 786 Op->Asl.ExternalName); 787 } 788 789 /* case 2: declaration and reference are both inside of the same method */ 790 791 else if (ReferenceParentMethod && DeclarationParentMethod && 792 ReferenceParentMethod == DeclarationParentMethod->Op) 793 { 794 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op, 795 Op->Asl.ExternalName); 796 } 797 } 798 799 /* Check for a reference vs. name declaration */ 800 801 if (!(OpInfo->Flags & AML_NAMED) && 802 !(OpInfo->Flags & AML_CREATE)) 803 { 804 /* This node has been referenced, mark it for reference check */ 805 806 Node->Flags |= ANOBJ_IS_REFERENCED; 807 } 808 809 /* Attempt to optimize the NamePath */ 810 811 OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node); 812 813 /* 814 * 1) Dereference an alias (A name reference that is an alias) 815 * Aliases are not nested, the alias always points to the final object 816 */ 817 if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) && 818 (Node->Type == ACPI_TYPE_LOCAL_ALIAS)) 819 { 820 /* This node points back to the original PARSEOP_ALIAS */ 821 822 NextOp = Node->Op; 823 824 /* The first child is the alias target op */ 825 826 NextOp = NextOp->Asl.Child; 827 828 /* That in turn points back to original target alias node */ 829 830 if (NextOp->Asl.Node) 831 { 832 Node = NextOp->Asl.Node; 833 } 834 835 /* Else - forward reference to alias, will be resolved later */ 836 } 837 838 /* 2) Check for a reference to a resource descriptor */ 839 840 if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) || 841 (Node->Type == ACPI_TYPE_LOCAL_RESOURCE)) 842 { 843 /* 844 * This was a reference to a field within a resource descriptor. 845 * Extract the associated field offset (either a bit or byte 846 * offset depending on the field type) and change the named 847 * reference into an integer for AML code generation 848 */ 849 Offset = Node->Value; 850 TagBitLength = Node->Length; 851 852 /* 853 * If a field is being created, generate the length (in bits) of 854 * the field. Note: Opcodes other than CreateXxxField and Index 855 * can come through here. For other opcodes, we just need to 856 * convert the resource tag reference to an integer offset. 857 */ 858 switch (Op->Asl.Parent->Asl.AmlOpcode) 859 { 860 case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */ 861 /* 862 * We know the length operand is an integer constant because 863 * we know that it contains a reference to a resource 864 * descriptor tag. 865 */ 866 FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer; 867 break; 868 869 case AML_CREATE_BIT_FIELD_OP: 870 871 FieldBitLength = 1; 872 break; 873 874 case AML_CREATE_BYTE_FIELD_OP: 875 case AML_INDEX_OP: 876 877 FieldBitLength = 8; 878 break; 879 880 case AML_CREATE_WORD_FIELD_OP: 881 882 FieldBitLength = 16; 883 break; 884 885 case AML_CREATE_DWORD_FIELD_OP: 886 887 FieldBitLength = 32; 888 break; 889 890 case AML_CREATE_QWORD_FIELD_OP: 891 892 FieldBitLength = 64; 893 break; 894 895 default: 896 897 FieldBitLength = 0; 898 break; 899 } 900 901 /* Check the field length against the length of the resource tag */ 902 903 if (FieldBitLength) 904 { 905 if (TagBitLength < FieldBitLength) 906 { 907 Message = ASL_MSG_TAG_SMALLER; 908 } 909 else if (TagBitLength > FieldBitLength) 910 { 911 Message = ASL_MSG_TAG_LARGER; 912 } 913 914 if (Message) 915 { 916 sprintf (AslGbl_MsgBuffer, 917 "Size mismatch, Tag: %u bit%s, Field: %u bit%s", 918 TagBitLength, (TagBitLength > 1) ? "s" : "", 919 FieldBitLength, (FieldBitLength > 1) ? "s" : ""); 920 921 AslError (ASL_WARNING, Message, Op, AslGbl_MsgBuffer); 922 } 923 } 924 925 /* Convert the BitOffset to a ByteOffset for certain opcodes */ 926 927 switch (Op->Asl.Parent->Asl.AmlOpcode) 928 { 929 case AML_CREATE_BYTE_FIELD_OP: 930 case AML_CREATE_WORD_FIELD_OP: 931 case AML_CREATE_DWORD_FIELD_OP: 932 case AML_CREATE_QWORD_FIELD_OP: 933 case AML_INDEX_OP: 934 935 Offset = ACPI_DIV_8 (Offset); 936 break; 937 938 default: 939 940 break; 941 } 942 943 /* Now convert this node to an integer whose value is the field offset */ 944 945 Op->Asl.AmlLength = 0; 946 Op->Asl.ParseOpcode = PARSEOP_INTEGER; 947 Op->Asl.Value.Integer = (UINT64) Offset; 948 Op->Asl.CompileFlags |= OP_IS_RESOURCE_FIELD; 949 950 OpcGenerateAmlOpcode (Op); 951 } 952 953 /* 3) Check for a method invocation */ 954 955 else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) && 956 (Node->Type == ACPI_TYPE_METHOD) && 957 (Op->Asl.Parent) && 958 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) || 959 960 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) 961 { 962 /* 963 * A reference to a method within one of these opcodes is not an 964 * invocation of the method, it is simply a reference to the method. 965 * 966 * September 2016: Removed DeRefOf from this list 967 */ 968 if ((Op->Asl.Parent) && 969 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) || 970 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) || 971 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)|| 972 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE))) 973 { 974 return_ACPI_STATUS (AE_OK); 975 } 976 977 /* 978 * There are two types of method invocation: 979 * 1) Invocation with arguments -- the parser recognizes this 980 * as a METHODCALL. 981 * 2) Invocation with no arguments --the parser cannot determine that 982 * this is a method invocation, therefore we have to figure it out 983 * here. 984 */ 985 if (Node->Type != ACPI_TYPE_METHOD) 986 { 987 sprintf (AslGbl_MsgBuffer, "%s is a %s", 988 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type)); 989 990 AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, AslGbl_MsgBuffer); 991 return_ACPI_STATUS (AE_OK); 992 } 993 994 /* Save the method node in the caller's op */ 995 996 Op->Asl.Node = Node; 997 if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF) 998 { 999 return_ACPI_STATUS (AE_OK); 1000 } 1001 1002 /* 1003 * This is a method invocation, with or without arguments. 1004 * Count the number of arguments, each appears as a child 1005 * under the parent node 1006 */ 1007 Op->Asl.ParseOpcode = PARSEOP_METHODCALL; 1008 UtSetParseOpName (Op); 1009 1010 PassedArgs = 0; 1011 NextOp = Op->Asl.Child; 1012 1013 while (NextOp) 1014 { 1015 PassedArgs++; 1016 NextOp = NextOp->Asl.Next; 1017 } 1018 1019 if (Node->Value != ASL_EXTERNAL_METHOD_UNKNOWN_PARAMS && 1020 Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL) 1021 { 1022 /* 1023 * Check the parsed arguments with the number expected by the 1024 * method declaration itself 1025 */ 1026 if (PassedArgs != Node->Value) 1027 { 1028 if (Node->Flags & ANOBJ_IS_EXTERNAL) 1029 { 1030 sprintf (AslGbl_MsgBuffer, 1031 "according to previous use, %s requires %u", 1032 Op->Asl.ExternalName, Node->Value); 1033 } 1034 else 1035 { 1036 sprintf (AslGbl_MsgBuffer, "%s requires %u", Op->Asl.ExternalName, 1037 Node->Value); 1038 } 1039 1040 if (PassedArgs < Node->Value) 1041 { 1042 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, AslGbl_MsgBuffer); 1043 } 1044 else 1045 { 1046 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, AslGbl_MsgBuffer); 1047 } 1048 } 1049 } 1050 1051 /* 1052 * At this point, a method call to an external method has been 1053 * detected. As of 11/19/2019, iASL does not support parameter counts 1054 * for methods declared as external. Therefore, save the parameter 1055 * count of the first method call and use this count check other 1056 * method calls to ensure that the methods are being called with the 1057 * same amount of parameters. 1058 */ 1059 else if (Node->Type == ACPI_TYPE_METHOD && 1060 (Node->Flags & ANOBJ_IS_EXTERNAL) && 1061 Node->Value == ASL_EXTERNAL_METHOD_UNKNOWN_PARAMS && 1062 Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL) 1063 { 1064 Node->Value = PassedArgs; 1065 } 1066 } 1067 1068 /* 4) Check for an ASL Field definition */ 1069 1070 else if ((Op->Asl.Parent) && 1071 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) || 1072 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD))) 1073 { 1074 /* 1075 * Offset checking for fields. If the parent operation region has a 1076 * constant length (known at compile time), we can check fields 1077 * defined in that region against the region length. This will catch 1078 * fields and field units that cannot possibly fit within the region. 1079 * 1080 * Note: Index fields do not directly reference an operation region, 1081 * thus they are not included in this check. 1082 */ 1083 if (Op == Op->Asl.Parent->Asl.Child) 1084 { 1085 /* 1086 * This is the first child of the field node, which is 1087 * the name of the region. Get the parse node for the 1088 * region -- which contains the length of the region. 1089 */ 1090 OwningOp = Node->Op; 1091 Op->Asl.Parent->Asl.ExtraValue = 1092 ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer); 1093 1094 /* Examine the field access width */ 1095 1096 switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer) 1097 { 1098 case AML_FIELD_ACCESS_ANY: 1099 case AML_FIELD_ACCESS_BYTE: 1100 case AML_FIELD_ACCESS_BUFFER: 1101 default: 1102 1103 MinimumLength = 1; 1104 break; 1105 1106 case AML_FIELD_ACCESS_WORD: 1107 1108 MinimumLength = 2; 1109 break; 1110 1111 case AML_FIELD_ACCESS_DWORD: 1112 1113 MinimumLength = 4; 1114 break; 1115 1116 case AML_FIELD_ACCESS_QWORD: 1117 1118 MinimumLength = 8; 1119 break; 1120 } 1121 1122 /* 1123 * Is the region at least as big as the access width? 1124 * Note: DataTableRegions have 0 length 1125 */ 1126 if (((UINT32) OwningOp->Asl.Value.Integer) && 1127 ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength)) 1128 { 1129 AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL); 1130 } 1131 1132 /* 1133 * Check EC/CMOS/SMBUS fields to make sure that the correct 1134 * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS) 1135 */ 1136 SpaceIdOp = OwningOp->Asl.Child->Asl.Next; 1137 switch ((UINT32) SpaceIdOp->Asl.Value.Integer) 1138 { 1139 case ACPI_ADR_SPACE_EC: 1140 case ACPI_ADR_SPACE_CMOS: 1141 case ACPI_ADR_SPACE_GPIO: 1142 1143 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != 1144 AML_FIELD_ACCESS_BYTE) 1145 { 1146 AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL); 1147 } 1148 break; 1149 1150 case ACPI_ADR_SPACE_SMBUS: 1151 case ACPI_ADR_SPACE_IPMI: 1152 case ACPI_ADR_SPACE_GSBUS: 1153 1154 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != 1155 AML_FIELD_ACCESS_BUFFER) 1156 { 1157 AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL); 1158 } 1159 break; 1160 1161 default: 1162 1163 /* Nothing to do for other address spaces */ 1164 1165 break; 1166 } 1167 } 1168 else 1169 { 1170 /* 1171 * This is one element of the field list. Check to make sure 1172 * that it does not go beyond the end of the parent operation region. 1173 * 1174 * In the code below: 1175 * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits) 1176 * Op->Asl.ExtraValue - Field start offset (bits) 1177 * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits) 1178 * Op->Asl.Child->Asl.ExtraValue - Field access width (bits) 1179 */ 1180 if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child) 1181 { 1182 XfCheckFieldRange (Op, 1183 Op->Asl.Parent->Asl.ExtraValue, 1184 Op->Asl.ExtraValue, 1185 (UINT32) Op->Asl.Child->Asl.Value.Integer, 1186 Op->Asl.Child->Asl.ExtraValue); 1187 } 1188 } 1189 } 1190 1191 /* 1192 * 5) Check for external resolution 1193 * By this point, everything should be loaded in the namespace. If a 1194 * namespace lookup results in a namespace node that is an external, it 1195 * means that this named object was not defined in the input ASL. This 1196 * causes issues because there are plenty of incidents where developers 1197 * use the external keyword to suppress compiler errors about undefined 1198 * objects. Note: this only applies when compiling multiple definition 1199 * blocks. 1200 */ 1201 if (AslGbl_ParseTreeRoot->Asl.Child && AslGbl_ParseTreeRoot->Asl.Child->Asl.Next && 1202 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL && 1203 Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL) && 1204 (Node->Flags & ANOBJ_IS_EXTERNAL)) 1205 { 1206 AslError (ASL_ERROR, ASL_MSG_UNDEFINED_EXTERNAL, Op, NULL); 1207 } 1208 1209 /* 5) Check for a connection object */ 1210 #if 0 1211 else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION) 1212 { 1213 return_ACPI_STATUS (Status); 1214 } 1215 #endif 1216 1217 Op->Asl.Node = Node; 1218 return_ACPI_STATUS (Status); 1219 } 1220 1221 1222 /******************************************************************************* 1223 * 1224 * FUNCTION: XfNamespaceLocateEnd 1225 * 1226 * PARAMETERS: ASL_WALK_CALLBACK 1227 * 1228 * RETURN: Status 1229 * 1230 * DESCRIPTION: Ascending callback used during cross reference. We only 1231 * need to worry about scope management here. 1232 * 1233 ******************************************************************************/ 1234 1235 static ACPI_STATUS 1236 XfNamespaceLocateEnd ( 1237 ACPI_PARSE_OBJECT *Op, 1238 UINT32 Level, 1239 void *Context) 1240 { 1241 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 1242 const ACPI_OPCODE_INFO *OpInfo; 1243 1244 1245 ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd); 1246 1247 1248 /* We are only interested in opcodes that have an associated name */ 1249 1250 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 1251 if (!(OpInfo->Flags & AML_NAMED)) 1252 { 1253 return_ACPI_STATUS (AE_OK); 1254 } 1255 1256 /* Not interested in name references, we did not open a scope for them */ 1257 1258 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || 1259 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || 1260 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) || 1261 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) 1262 { 1263 return_ACPI_STATUS (AE_OK); 1264 } 1265 1266 /* Pop the scope stack if necessary */ 1267 1268 if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode))) 1269 { 1270 1271 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 1272 "%s: Popping scope for Op %p\n", 1273 AcpiUtGetTypeName (OpInfo->ObjectType), Op)); 1274 1275 (void) AcpiDsScopeStackPop (WalkState); 1276 } 1277 1278 return_ACPI_STATUS (AE_OK); 1279 } 1280 1281 1282 /******************************************************************************* 1283 * 1284 * FUNCTION: XfValidateCrossReference 1285 * 1286 * PARAMETERS: Op - Parse Op that references the object 1287 * OpInfo - Parse Op info struct 1288 * Node - Node for the referenced object 1289 * 1290 * RETURN: TRUE if the reference is legal, FALSE otherwise 1291 * 1292 * DESCRIPTION: Determine if a reference to another object is allowed. 1293 * 1294 * EXAMPLE: 1295 * Method (A) {Name (INT1, 1)} Declaration of object INT1 1296 * Method (B) (Store (2, \A.INT1)} Illegal reference to object INT1 1297 * (INT1 is temporary, valid only during 1298 * execution of A) 1299 * 1300 * NOTES: 1301 * A null pointer returned by either UtGetParentMethodOp or 1302 * UtGetParentMethodNode indicates that the parameter object is not 1303 * within a control method. 1304 * 1305 * Five cases are handled: Case(Op, Node) 1306 * 1) Case(0,0): Op is not within a method, Node is not --> OK 1307 * 2) Case(0,1): Op is not within a method, but Node is --> Illegal 1308 * 3) Case(1,0): Op is within a method, Node is not --> OK 1309 * 4) Case(1,1): Both are within the same method --> OK 1310 * 5) Case(1,1): Both are in methods, but not same method --> Illegal 1311 * 1312 ******************************************************************************/ 1313 1314 static BOOLEAN 1315 XfValidateCrossReference ( 1316 ACPI_PARSE_OBJECT *Op, 1317 const ACPI_OPCODE_INFO *OpInfo, 1318 ACPI_NAMESPACE_NODE *Node) 1319 { 1320 ACPI_PARSE_OBJECT *ReferencingMethodOp; 1321 ACPI_NAMESPACE_NODE *ReferencedMethodNode; 1322 1323 1324 /* Ignore actual named (and related) object declarations */ 1325 1326 if (OpInfo->Flags & (AML_NAMED | AML_CREATE | AML_DEFER | AML_HAS_ARGS)) 1327 { 1328 return (TRUE); 1329 } 1330 1331 /* 1332 * 1) Search upwards in parse tree for owner of the referencing object 1333 * 2) Search upwards in namespace to find the owner of the referenced object 1334 */ 1335 ReferencingMethodOp = UtGetParentMethodOp (Op); 1336 ReferencedMethodNode = UtGetParentMethodNode (Node); 1337 1338 if (!ReferencingMethodOp && !ReferencedMethodNode) 1339 { 1340 /* 1341 * 1) Case (0,0): Both Op and Node are not within methods 1342 * --> OK 1343 */ 1344 return (TRUE); 1345 } 1346 1347 if (!ReferencingMethodOp && ReferencedMethodNode) 1348 { 1349 /* 1350 * 2) Case (0,1): Op is not in a method, but Node is within a 1351 * method --> illegal 1352 */ 1353 return (FALSE); 1354 } 1355 else if (ReferencingMethodOp && !ReferencedMethodNode) 1356 { 1357 /* 1358 * 3) Case (1,0): Op is within a method, but Node is not 1359 * --> OK 1360 */ 1361 return (TRUE); 1362 } 1363 else if (ReferencingMethodOp->Asl.Node == ReferencedMethodNode) 1364 { 1365 /* 1366 * 4) Case (1,1): Both Op and Node are within the same method 1367 * --> OK 1368 */ 1369 return (TRUE); 1370 } 1371 else 1372 { 1373 /* 1374 * 5) Case (1,1), Op and Node are in different methods 1375 * --> Illegal 1376 */ 1377 return (FALSE); 1378 } 1379 } 1380