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 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include <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 ACPI_PARSE_OBJECT * 178 XfGetParentMethod ( 179 ACPI_PARSE_OBJECT *Op); 180 181 static BOOLEAN 182 XfObjectExists ( 183 char *Name); 184 185 static ACPI_STATUS 186 XfCompareOneNamespaceObject ( 187 ACPI_HANDLE ObjHandle, 188 UINT32 Level, 189 void *Context, 190 void **ReturnValue); 191 192 static void 193 XfCheckFieldRange ( 194 ACPI_PARSE_OBJECT *Op, 195 UINT32 RegionBitLength, 196 UINT32 FieldBitOffset, 197 UINT32 FieldBitLength, 198 UINT32 AccessBitWidth); 199 200 201 /******************************************************************************* 202 * 203 * FUNCTION: XfCrossReferenceNamespace 204 * 205 * PARAMETERS: None 206 * 207 * RETURN: Status 208 * 209 * DESCRIPTION: Perform a cross reference check of the parse tree against the 210 * namespace. Every named referenced within the parse tree 211 * should be get resolved with a namespace lookup. If not, the 212 * original reference in the ASL code is invalid -- i.e., refers 213 * to a non-existent object. 214 * 215 * NOTE: The ASL "External" operator causes the name to be inserted into the 216 * namespace so that references to the external name will be resolved 217 * correctly here. 218 * 219 ******************************************************************************/ 220 221 ACPI_STATUS 222 XfCrossReferenceNamespace ( 223 void) 224 { 225 ACPI_WALK_STATE *WalkState; 226 227 228 /* 229 * Create a new walk state for use when looking up names 230 * within the namespace (Passed as context to the callbacks) 231 */ 232 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL); 233 if (!WalkState) 234 { 235 return (AE_NO_MEMORY); 236 } 237 238 /* Walk the entire parse tree */ 239 240 TrWalkParseTree (Gbl_ParseTreeRoot, ASL_WALK_VISIT_TWICE, 241 XfNamespaceLocateBegin, XfNamespaceLocateEnd, WalkState); 242 243 ACPI_FREE (WalkState); 244 return (AE_OK); 245 } 246 247 248 /******************************************************************************* 249 * 250 * FUNCTION: XfObjectExists 251 * 252 * PARAMETERS: Name - 4 char ACPI name 253 * 254 * RETURN: TRUE if name exists in namespace 255 * 256 * DESCRIPTION: Walk the namespace to find an object 257 * 258 ******************************************************************************/ 259 260 static BOOLEAN 261 XfObjectExists ( 262 char *Name) 263 { 264 ACPI_STATUS Status; 265 266 267 /* Walk entire namespace from the supplied root */ 268 269 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 270 ACPI_UINT32_MAX, FALSE, XfCompareOneNamespaceObject, NULL, 271 Name, NULL); 272 if (Status == AE_CTRL_TRUE) 273 { 274 /* At least one instance of the name was found */ 275 276 return (TRUE); 277 } 278 279 return (FALSE); 280 } 281 282 283 /******************************************************************************* 284 * 285 * FUNCTION: XfCompareOneNamespaceObject 286 * 287 * PARAMETERS: ACPI_WALK_CALLBACK 288 * 289 * RETURN: Status 290 * 291 * DESCRIPTION: Compare name of one object. 292 * 293 ******************************************************************************/ 294 295 static ACPI_STATUS 296 XfCompareOneNamespaceObject ( 297 ACPI_HANDLE ObjHandle, 298 UINT32 Level, 299 void *Context, 300 void **ReturnValue) 301 { 302 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 303 304 305 /* Simply check the name */ 306 307 if (*((UINT32 *) (Context)) == Node->Name.Integer) 308 { 309 /* Abort walk if we found one instance */ 310 311 return (AE_CTRL_TRUE); 312 } 313 314 return (AE_OK); 315 } 316 317 318 /******************************************************************************* 319 * 320 * FUNCTION: XfCheckFieldRange 321 * 322 * PARAMETERS: RegionBitLength - Length of entire parent region 323 * FieldBitOffset - Start of the field unit (within region) 324 * FieldBitLength - Entire length of field unit 325 * AccessBitWidth - Access width of the field unit 326 * 327 * RETURN: None 328 * 329 * DESCRIPTION: Check one field unit to make sure it fits in the parent 330 * op region. 331 * 332 * Note: AccessBitWidth must be either 8,16,32, or 64 333 * 334 ******************************************************************************/ 335 336 static void 337 XfCheckFieldRange ( 338 ACPI_PARSE_OBJECT *Op, 339 UINT32 RegionBitLength, 340 UINT32 FieldBitOffset, 341 UINT32 FieldBitLength, 342 UINT32 AccessBitWidth) 343 { 344 UINT32 FieldEndBitOffset; 345 346 347 /* 348 * Check each field unit against the region size. The entire 349 * field unit (start offset plus length) must fit within the 350 * region. 351 */ 352 FieldEndBitOffset = FieldBitOffset + FieldBitLength; 353 354 if (FieldEndBitOffset > RegionBitLength) 355 { 356 /* Field definition itself is beyond the end-of-region */ 357 358 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_OFFSET, Op, NULL); 359 return; 360 } 361 362 /* 363 * Now check that the field plus AccessWidth doesn't go beyond 364 * the end-of-region. Assumes AccessBitWidth is a power of 2 365 */ 366 FieldEndBitOffset = ACPI_ROUND_UP (FieldEndBitOffset, AccessBitWidth); 367 368 if (FieldEndBitOffset > RegionBitLength) 369 { 370 /* Field definition combined with the access is beyond EOR */ 371 372 AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_ACCESS_WIDTH, Op, NULL); 373 } 374 } 375 376 377 /******************************************************************************* 378 * 379 * FUNCTION: XfGetParentMethod 380 * 381 * PARAMETERS: Op - Parse Op to be checked 382 * 383 * RETURN: Control method Op if found. NULL otherwise 384 * 385 * DESCRIPTION: Find the control method parent of a parse op. Returns NULL if 386 * the input Op is not within a control method. 387 * 388 ******************************************************************************/ 389 390 static ACPI_PARSE_OBJECT * 391 XfGetParentMethod ( 392 ACPI_PARSE_OBJECT *Op) 393 { 394 ACPI_PARSE_OBJECT *NextOp; 395 396 397 NextOp = Op->Asl.Parent; 398 while (NextOp) 399 { 400 if (NextOp->Asl.AmlOpcode == AML_METHOD_OP) 401 { 402 return (NextOp); 403 } 404 405 NextOp = NextOp->Asl.Parent; 406 } 407 408 return (NULL); /* No parent method found */ 409 } 410 411 /******************************************************************************* 412 * 413 * FUNCTION: XfNamespaceLocateBegin 414 * 415 * PARAMETERS: ASL_WALK_CALLBACK 416 * 417 * RETURN: Status 418 * 419 * DESCRIPTION: Descending callback used during cross-reference. For named 420 * object references, attempt to locate the name in the 421 * namespace. 422 * 423 * NOTE: ASL references to named fields within resource descriptors are 424 * resolved to integer values here. Therefore, this step is an 425 * important part of the code generation. We don't know that the 426 * name refers to a resource descriptor until now. 427 * 428 ******************************************************************************/ 429 430 static ACPI_STATUS 431 XfNamespaceLocateBegin ( 432 ACPI_PARSE_OBJECT *Op, 433 UINT32 Level, 434 void *Context) 435 { 436 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 437 ACPI_NAMESPACE_NODE *Node; 438 ACPI_STATUS Status; 439 ACPI_OBJECT_TYPE ObjectType; 440 char *Path; 441 UINT8 PassedArgs; 442 ACPI_PARSE_OBJECT *NextOp; 443 ACPI_PARSE_OBJECT *OwningOp; 444 ACPI_PARSE_OBJECT *SpaceIdOp; 445 UINT32 MinimumLength; 446 UINT32 Offset; 447 UINT32 FieldBitLength; 448 UINT32 TagBitLength; 449 UINT8 Message = 0; 450 const ACPI_OPCODE_INFO *OpInfo; 451 UINT32 Flags; 452 ASL_METHOD_LOCAL *MethodLocals = NULL; 453 ASL_METHOD_LOCAL *MethodArgs = NULL; 454 int RegisterNumber; 455 UINT32 i; 456 457 458 ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op); 459 460 461 if ((Op->Asl.AmlOpcode == AML_METHOD_OP) && Op->Asl.Node) 462 { 463 Node = Op->Asl.Node; 464 465 /* Support for method LocalX/ArgX analysis */ 466 467 if (!Node->MethodLocals) 468 { 469 /* Create local/arg info blocks */ 470 471 MethodLocals = UtLocalCalloc ( 472 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_LOCALS); 473 Node->MethodLocals = MethodLocals; 474 475 MethodArgs = UtLocalCalloc ( 476 sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_ARGS); 477 Node->MethodArgs = MethodArgs; 478 479 /* 480 * Get the method argument count 481 * First, get the name node 482 */ 483 NextOp = Op->Asl.Child; 484 485 /* Get the NumArguments node */ 486 487 NextOp = NextOp->Asl.Next; 488 Node->ArgCount = (UINT8) 489 (((UINT8) NextOp->Asl.Value.Integer) & 0x07); 490 491 /* We will track all posible ArgXs */ 492 493 for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) 494 { 495 if (i < Node->ArgCount) 496 { 497 /* Real Args are always "initialized" */ 498 499 MethodArgs[i].Flags = ASL_ARG_INITIALIZED; 500 } 501 else 502 { 503 /* Other ArgXs can be used as locals */ 504 505 MethodArgs[i].Flags = ASL_ARG_IS_LOCAL; 506 } 507 508 MethodArgs[i].Op = Op; 509 } 510 } 511 } 512 513 /* 514 * If this node is the actual declaration of a name 515 * [such as the XXXX name in "Method (XXXX)"], 516 * we are not interested in it here. We only care about names that are 517 * references to other objects within the namespace and the parent objects 518 * of name declarations 519 */ 520 if (Op->Asl.CompileFlags & OP_IS_NAME_DECLARATION) 521 { 522 return_ACPI_STATUS (AE_OK); 523 } 524 525 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 526 527 /* Check method LocalX variables */ 528 529 if (OpInfo->Type == AML_TYPE_LOCAL_VARIABLE) 530 { 531 /* Find parent method Op */ 532 533 NextOp = XfGetParentMethod (Op); 534 if (!NextOp) 535 { 536 return_ACPI_STATUS (AE_OK); 537 } 538 539 /* Get method node */ 540 541 Node = NextOp->Asl.Node; 542 543 RegisterNumber = Op->Asl.AmlOpcode & 0x0007; /* 0x60 through 0x67 */ 544 MethodLocals = Node->MethodLocals; 545 546 if (Op->Asl.CompileFlags & OP_IS_TARGET) 547 { 548 /* Local is being initialized */ 549 550 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_INITIALIZED; 551 MethodLocals[RegisterNumber].Op = Op; 552 553 return_ACPI_STATUS (AE_OK); 554 } 555 556 /* Mark this Local as referenced */ 557 558 MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_REFERENCED; 559 MethodLocals[RegisterNumber].Op = Op; 560 561 return_ACPI_STATUS (AE_OK); 562 } 563 564 /* Check method ArgX variables */ 565 566 if (OpInfo->Type == AML_TYPE_METHOD_ARGUMENT) 567 { 568 /* Find parent method Op */ 569 570 NextOp = XfGetParentMethod (Op); 571 if (!NextOp) 572 { 573 return_ACPI_STATUS (AE_OK); 574 } 575 576 /* Get method node */ 577 578 Node = NextOp->Asl.Node; 579 580 /* Get Arg # */ 581 582 RegisterNumber = Op->Asl.AmlOpcode - AML_ARG0; /* 0x68 through 0x6F */ 583 MethodArgs = Node->MethodArgs; 584 585 /* Mark this Arg as referenced */ 586 587 MethodArgs[RegisterNumber].Flags |= ASL_ARG_REFERENCED; 588 MethodArgs[RegisterNumber].Op = Op; 589 590 if (Op->Asl.CompileFlags & OP_IS_TARGET) 591 { 592 /* Arg is being initialized */ 593 594 MethodArgs[RegisterNumber].Flags |= ASL_ARG_INITIALIZED; 595 } 596 597 return_ACPI_STATUS (AE_OK); 598 } 599 600 /* 601 * After method ArgX and LocalX, we are only interested in opcodes 602 * that have an associated name 603 */ 604 if ((!(OpInfo->Flags & AML_NAMED)) && 605 (!(OpInfo->Flags & AML_CREATE)) && 606 (Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) && 607 (Op->Asl.ParseOpcode != PARSEOP_NAMESEG) && 608 (Op->Asl.ParseOpcode != PARSEOP_METHODCALL) && 609 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL)) 610 { 611 return_ACPI_STATUS (AE_OK); 612 } 613 614 /* 615 * One special case: CondRefOf operator - we don't care if the name exists 616 * or not at this point, just ignore it, the point of the operator is to 617 * determine if the name exists at runtime. 618 */ 619 if ((Op->Asl.Parent) && 620 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)) 621 { 622 return_ACPI_STATUS (AE_OK); 623 } 624 625 /* 626 * We must enable the "search-to-root" for single NameSegs, but 627 * we have to be very careful about opening up scopes 628 */ 629 Flags = ACPI_NS_SEARCH_PARENT; 630 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || 631 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || 632 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) || 633 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) 634 { 635 /* 636 * These are name references, do not push the scope stack 637 * for them. 638 */ 639 Flags |= ACPI_NS_DONT_OPEN_SCOPE; 640 } 641 642 /* Get the NamePath from the appropriate place */ 643 644 if (OpInfo->Flags & AML_NAMED) 645 { 646 /* For nearly all NAMED operators, the name reference is the first child */ 647 648 Path = Op->Asl.Child->Asl.Value.String; 649 if (Op->Asl.AmlOpcode == AML_ALIAS_OP) 650 { 651 /* 652 * ALIAS is the only oddball opcode, the name declaration 653 * (alias name) is the second operand 654 */ 655 Path = Op->Asl.Child->Asl.Next->Asl.Value.String; 656 } 657 } 658 else if (OpInfo->Flags & AML_CREATE) 659 { 660 /* Name must appear as the last parameter */ 661 662 NextOp = Op->Asl.Child; 663 while (!(NextOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION)) 664 { 665 NextOp = NextOp->Asl.Next; 666 } 667 668 Path = NextOp->Asl.Value.String; 669 } 670 else 671 { 672 Path = Op->Asl.Value.String; 673 } 674 675 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 676 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 677 "Type=%s\n", AcpiUtGetTypeName (ObjectType))); 678 679 /* 680 * Lookup the name in the namespace. Name must exist at this point, or it 681 * is an invalid reference. 682 * 683 * The namespace is also used as a lookup table for references to resource 684 * descriptors and the fields within them. 685 */ 686 Gbl_NsLookupCount++; 687 688 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType, 689 ACPI_IMODE_EXECUTE, Flags, WalkState, &Node); 690 if (ACPI_FAILURE (Status)) 691 { 692 if (Status == AE_NOT_FOUND) 693 { 694 /* 695 * We didn't find the name reference by path -- we can qualify this 696 * a little better before we print an error message 697 */ 698 if (strlen (Path) == ACPI_NAME_SIZE) 699 { 700 /* A simple, one-segment ACPI name */ 701 702 if (XfObjectExists (Path)) 703 { 704 /* 705 * There exists such a name, but we couldn't get to it 706 * from this scope 707 */ 708 AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op, 709 Op->Asl.ExternalName); 710 } 711 else 712 { 713 /* The name doesn't exist, period */ 714 715 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, 716 Op, Op->Asl.ExternalName); 717 } 718 } 719 else 720 { 721 /* Check for a fully qualified path */ 722 723 if (Path[0] == AML_ROOT_PREFIX) 724 { 725 /* Gave full path, the object does not exist */ 726 727 AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op, 728 Op->Asl.ExternalName); 729 } 730 else 731 { 732 /* 733 * We can't tell whether it doesn't exist or just 734 * can't be reached. 735 */ 736 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, 737 Op->Asl.ExternalName); 738 } 739 } 740 741 Status = AE_OK; 742 } 743 744 return_ACPI_STATUS (Status); 745 } 746 747 /* Object was found above, check for an illegal forward reference */ 748 749 if (Op->Asl.CompileFlags & OP_NOT_FOUND_DURING_LOAD) 750 { 751 /* 752 * During the load phase, this Op was flagged as a possible 753 * illegal forward reference 754 * 755 * Note: Allow "forward references" from within a method to an 756 * object that is not within any method (module-level code) 757 */ 758 if (!WalkState->ScopeInfo || (UtGetParentMethod (Node) && 759 !UtNodeIsDescendantOf (WalkState->ScopeInfo->Scope.Node, 760 UtGetParentMethod (Node)))) 761 { 762 AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op, 763 Op->Asl.ExternalName); 764 } 765 } 766 767 /* Check for a reference vs. name declaration */ 768 769 if (!(OpInfo->Flags & AML_NAMED) && 770 !(OpInfo->Flags & AML_CREATE)) 771 { 772 /* This node has been referenced, mark it for reference check */ 773 774 Node->Flags |= ANOBJ_IS_REFERENCED; 775 } 776 777 /* Attempt to optimize the NamePath */ 778 779 OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node); 780 781 /* 782 * 1) Dereference an alias (A name reference that is an alias) 783 * Aliases are not nested, the alias always points to the final object 784 */ 785 if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) && 786 (Node->Type == ACPI_TYPE_LOCAL_ALIAS)) 787 { 788 /* This node points back to the original PARSEOP_ALIAS */ 789 790 NextOp = Node->Op; 791 792 /* The first child is the alias target op */ 793 794 NextOp = NextOp->Asl.Child; 795 796 /* That in turn points back to original target alias node */ 797 798 if (NextOp->Asl.Node) 799 { 800 Node = NextOp->Asl.Node; 801 } 802 803 /* Else - forward reference to alias, will be resolved later */ 804 } 805 806 /* 2) Check for a reference to a resource descriptor */ 807 808 if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) || 809 (Node->Type == ACPI_TYPE_LOCAL_RESOURCE)) 810 { 811 /* 812 * This was a reference to a field within a resource descriptor. 813 * Extract the associated field offset (either a bit or byte 814 * offset depending on the field type) and change the named 815 * reference into an integer for AML code generation 816 */ 817 Offset = Node->Value; 818 TagBitLength = Node->Length; 819 820 /* 821 * If a field is being created, generate the length (in bits) of 822 * the field. Note: Opcodes other than CreateXxxField and Index 823 * can come through here. For other opcodes, we just need to 824 * convert the resource tag reference to an integer offset. 825 */ 826 switch (Op->Asl.Parent->Asl.AmlOpcode) 827 { 828 case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */ 829 /* 830 * We know the length operand is an integer constant because 831 * we know that it contains a reference to a resource 832 * descriptor tag. 833 */ 834 FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer; 835 break; 836 837 case AML_CREATE_BIT_FIELD_OP: 838 839 FieldBitLength = 1; 840 break; 841 842 case AML_CREATE_BYTE_FIELD_OP: 843 case AML_INDEX_OP: 844 845 FieldBitLength = 8; 846 break; 847 848 case AML_CREATE_WORD_FIELD_OP: 849 850 FieldBitLength = 16; 851 break; 852 853 case AML_CREATE_DWORD_FIELD_OP: 854 855 FieldBitLength = 32; 856 break; 857 858 case AML_CREATE_QWORD_FIELD_OP: 859 860 FieldBitLength = 64; 861 break; 862 863 default: 864 865 FieldBitLength = 0; 866 break; 867 } 868 869 /* Check the field length against the length of the resource tag */ 870 871 if (FieldBitLength) 872 { 873 if (TagBitLength < FieldBitLength) 874 { 875 Message = ASL_MSG_TAG_SMALLER; 876 } 877 else if (TagBitLength > FieldBitLength) 878 { 879 Message = ASL_MSG_TAG_LARGER; 880 } 881 882 if (Message) 883 { 884 sprintf (MsgBuffer, 885 "Size mismatch, Tag: %u bit%s, Field: %u bit%s", 886 TagBitLength, (TagBitLength > 1) ? "s" : "", 887 FieldBitLength, (FieldBitLength > 1) ? "s" : ""); 888 889 AslError (ASL_WARNING, Message, Op, MsgBuffer); 890 } 891 } 892 893 /* Convert the BitOffset to a ByteOffset for certain opcodes */ 894 895 switch (Op->Asl.Parent->Asl.AmlOpcode) 896 { 897 case AML_CREATE_BYTE_FIELD_OP: 898 case AML_CREATE_WORD_FIELD_OP: 899 case AML_CREATE_DWORD_FIELD_OP: 900 case AML_CREATE_QWORD_FIELD_OP: 901 case AML_INDEX_OP: 902 903 Offset = ACPI_DIV_8 (Offset); 904 break; 905 906 default: 907 908 break; 909 } 910 911 /* Now convert this node to an integer whose value is the field offset */ 912 913 Op->Asl.AmlLength = 0; 914 Op->Asl.ParseOpcode = PARSEOP_INTEGER; 915 Op->Asl.Value.Integer = (UINT64) Offset; 916 Op->Asl.CompileFlags |= OP_IS_RESOURCE_FIELD; 917 918 OpcGenerateAmlOpcode (Op); 919 } 920 921 /* 3) Check for a method invocation */ 922 923 else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) && 924 (Node->Type == ACPI_TYPE_METHOD) && 925 (Op->Asl.Parent) && 926 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) || 927 928 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) 929 { 930 /* 931 * A reference to a method within one of these opcodes is not an 932 * invocation of the method, it is simply a reference to the method. 933 * 934 * September 2016: Removed DeRefOf from this list 935 */ 936 if ((Op->Asl.Parent) && 937 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) || 938 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) || 939 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)|| 940 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE))) 941 { 942 return_ACPI_STATUS (AE_OK); 943 } 944 945 /* 946 * There are two types of method invocation: 947 * 1) Invocation with arguments -- the parser recognizes this 948 * as a METHODCALL. 949 * 2) Invocation with no arguments --the parser cannot determine that 950 * this is a method invocation, therefore we have to figure it out 951 * here. 952 */ 953 if (Node->Type != ACPI_TYPE_METHOD) 954 { 955 sprintf (MsgBuffer, "%s is a %s", 956 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type)); 957 958 AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer); 959 return_ACPI_STATUS (AE_OK); 960 } 961 962 /* Save the method node in the caller's op */ 963 964 Op->Asl.Node = Node; 965 if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF) 966 { 967 return_ACPI_STATUS (AE_OK); 968 } 969 970 /* 971 * This is a method invocation, with or without arguments. 972 * Count the number of arguments, each appears as a child 973 * under the parent node 974 */ 975 Op->Asl.ParseOpcode = PARSEOP_METHODCALL; 976 UtSetParseOpName (Op); 977 978 PassedArgs = 0; 979 NextOp = Op->Asl.Child; 980 981 while (NextOp) 982 { 983 PassedArgs++; 984 NextOp = NextOp->Asl.Next; 985 } 986 987 if (Node->Value != ASL_EXTERNAL_METHOD && 988 Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL) 989 { 990 /* 991 * Check the parsed arguments with the number expected by the 992 * method declaration itself 993 */ 994 if (PassedArgs != Node->Value) 995 { 996 sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, 997 Node->Value); 998 999 if (PassedArgs < Node->Value) 1000 { 1001 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer); 1002 } 1003 else 1004 { 1005 AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer); 1006 } 1007 } 1008 } 1009 } 1010 1011 /* 4) Check for an ASL Field definition */ 1012 1013 else if ((Op->Asl.Parent) && 1014 ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) || 1015 (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD))) 1016 { 1017 /* 1018 * Offset checking for fields. If the parent operation region has a 1019 * constant length (known at compile time), we can check fields 1020 * defined in that region against the region length. This will catch 1021 * fields and field units that cannot possibly fit within the region. 1022 * 1023 * Note: Index fields do not directly reference an operation region, 1024 * thus they are not included in this check. 1025 */ 1026 if (Op == Op->Asl.Parent->Asl.Child) 1027 { 1028 /* 1029 * This is the first child of the field node, which is 1030 * the name of the region. Get the parse node for the 1031 * region -- which contains the length of the region. 1032 */ 1033 OwningOp = Node->Op; 1034 Op->Asl.Parent->Asl.ExtraValue = 1035 ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer); 1036 1037 /* Examine the field access width */ 1038 1039 switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer) 1040 { 1041 case AML_FIELD_ACCESS_ANY: 1042 case AML_FIELD_ACCESS_BYTE: 1043 case AML_FIELD_ACCESS_BUFFER: 1044 default: 1045 1046 MinimumLength = 1; 1047 break; 1048 1049 case AML_FIELD_ACCESS_WORD: 1050 1051 MinimumLength = 2; 1052 break; 1053 1054 case AML_FIELD_ACCESS_DWORD: 1055 1056 MinimumLength = 4; 1057 break; 1058 1059 case AML_FIELD_ACCESS_QWORD: 1060 1061 MinimumLength = 8; 1062 break; 1063 } 1064 1065 /* 1066 * Is the region at least as big as the access width? 1067 * Note: DataTableRegions have 0 length 1068 */ 1069 if (((UINT32) OwningOp->Asl.Value.Integer) && 1070 ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength)) 1071 { 1072 AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL); 1073 } 1074 1075 /* 1076 * Check EC/CMOS/SMBUS fields to make sure that the correct 1077 * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS) 1078 */ 1079 SpaceIdOp = OwningOp->Asl.Child->Asl.Next; 1080 switch ((UINT32) SpaceIdOp->Asl.Value.Integer) 1081 { 1082 case ACPI_ADR_SPACE_EC: 1083 case ACPI_ADR_SPACE_CMOS: 1084 case ACPI_ADR_SPACE_GPIO: 1085 1086 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != 1087 AML_FIELD_ACCESS_BYTE) 1088 { 1089 AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL); 1090 } 1091 break; 1092 1093 case ACPI_ADR_SPACE_SMBUS: 1094 case ACPI_ADR_SPACE_IPMI: 1095 case ACPI_ADR_SPACE_GSBUS: 1096 1097 if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != 1098 AML_FIELD_ACCESS_BUFFER) 1099 { 1100 AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL); 1101 } 1102 break; 1103 1104 default: 1105 1106 /* Nothing to do for other address spaces */ 1107 1108 break; 1109 } 1110 } 1111 else 1112 { 1113 /* 1114 * This is one element of the field list. Check to make sure 1115 * that it does not go beyond the end of the parent operation region. 1116 * 1117 * In the code below: 1118 * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits) 1119 * Op->Asl.ExtraValue - Field start offset (bits) 1120 * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits) 1121 * Op->Asl.Child->Asl.ExtraValue - Field access width (bits) 1122 */ 1123 if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child) 1124 { 1125 XfCheckFieldRange (Op, 1126 Op->Asl.Parent->Asl.ExtraValue, 1127 Op->Asl.ExtraValue, 1128 (UINT32) Op->Asl.Child->Asl.Value.Integer, 1129 Op->Asl.Child->Asl.ExtraValue); 1130 } 1131 } 1132 } 1133 1134 /* 5) Check for a connection object */ 1135 #if 0 1136 else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION) 1137 { 1138 return_ACPI_STATUS (Status); 1139 } 1140 #endif 1141 1142 Op->Asl.Node = Node; 1143 return_ACPI_STATUS (Status); 1144 } 1145 1146 1147 /******************************************************************************* 1148 * 1149 * FUNCTION: XfNamespaceLocateEnd 1150 * 1151 * PARAMETERS: ASL_WALK_CALLBACK 1152 * 1153 * RETURN: Status 1154 * 1155 * DESCRIPTION: Ascending callback used during cross reference. We only 1156 * need to worry about scope management here. 1157 * 1158 ******************************************************************************/ 1159 1160 static ACPI_STATUS 1161 XfNamespaceLocateEnd ( 1162 ACPI_PARSE_OBJECT *Op, 1163 UINT32 Level, 1164 void *Context) 1165 { 1166 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 1167 const ACPI_OPCODE_INFO *OpInfo; 1168 1169 1170 ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd); 1171 1172 1173 /* We are only interested in opcodes that have an associated name */ 1174 1175 OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 1176 if (!(OpInfo->Flags & AML_NAMED)) 1177 { 1178 return_ACPI_STATUS (AE_OK); 1179 } 1180 1181 /* Not interested in name references, we did not open a scope for them */ 1182 1183 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || 1184 (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || 1185 (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) || 1186 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) 1187 { 1188 return_ACPI_STATUS (AE_OK); 1189 } 1190 1191 /* Pop the scope stack if necessary */ 1192 1193 if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode))) 1194 { 1195 1196 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 1197 "%s: Popping scope for Op %p\n", 1198 AcpiUtGetTypeName (OpInfo->ObjectType), Op)); 1199 1200 (void) AcpiDsScopeStackPop (WalkState); 1201 } 1202 1203 return_ACPI_STATUS (AE_OK); 1204 } 1205