1 /****************************************************************************** 2 * 3 * Module Name: dswload - Dispatcher namespace load callbacks 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2019, 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 <contrib/dev/acpica/include/amlcode.h> 154 #include <contrib/dev/acpica/include/acdispat.h> 155 #include <contrib/dev/acpica/include/acnamesp.h> 156 #include <contrib/dev/acpica/include/acparser.h> 157 #include "aslcompiler.y.h" 158 159 160 #define _COMPONENT ACPI_COMPILER 161 ACPI_MODULE_NAME ("aslload") 162 163 /* Local prototypes */ 164 165 static ACPI_STATUS 166 LdLoadFieldElements ( 167 UINT32 AmlType, 168 ACPI_PARSE_OBJECT *Op, 169 ACPI_WALK_STATE *WalkState); 170 171 static ACPI_STATUS 172 LdLoadResourceElements ( 173 ACPI_PARSE_OBJECT *Op, 174 ACPI_WALK_STATE *WalkState); 175 176 static ACPI_STATUS 177 LdNamespace1Begin ( 178 ACPI_PARSE_OBJECT *Op, 179 UINT32 Level, 180 void *Context); 181 182 static ACPI_STATUS 183 LdNamespace2Begin ( 184 ACPI_PARSE_OBJECT *Op, 185 UINT32 Level, 186 void *Context); 187 188 static ACPI_STATUS 189 LdCommonNamespaceEnd ( 190 ACPI_PARSE_OBJECT *Op, 191 UINT32 Level, 192 void *Context); 193 194 static void 195 LdCheckSpecialNames ( 196 ACPI_NAMESPACE_NODE *Node, 197 ACPI_PARSE_OBJECT *Op); 198 199 /******************************************************************************* 200 * 201 * FUNCTION: LdLoadNamespace 202 * 203 * PARAMETERS: RootOp - Root of the parse tree 204 * 205 * RETURN: Status 206 * 207 * DESCRIPTION: Perform a walk of the parse tree that in turn loads all of the 208 * named ASL/AML objects into the namespace. The namespace is 209 * constructed in order to resolve named references and references 210 * to named fields within resource templates/descriptors. 211 * 212 ******************************************************************************/ 213 214 ACPI_STATUS 215 LdLoadNamespace ( 216 ACPI_PARSE_OBJECT *RootOp) 217 { 218 ACPI_WALK_STATE *WalkState; 219 220 221 /* Create a new walk state */ 222 223 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL); 224 if (!WalkState) 225 { 226 return (AE_NO_MEMORY); 227 } 228 229 /* Walk the entire parse tree, first pass */ 230 231 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace1Begin, 232 LdCommonNamespaceEnd, WalkState); 233 234 /* Second pass to handle forward references */ 235 236 TrWalkParseTree (RootOp, ASL_WALK_VISIT_TWICE, LdNamespace2Begin, 237 LdCommonNamespaceEnd, WalkState); 238 239 /* Dump the namespace if debug is enabled */ 240 241 if (AcpiDbgLevel & ACPI_LV_TABLES) 242 { 243 AcpiNsDumpTables (ACPI_NS_ALL, ACPI_UINT32_MAX); 244 } 245 246 ACPI_FREE (WalkState); 247 return (AE_OK); 248 } 249 250 251 /******************************************************************************* 252 * 253 * FUNCTION: LdLoadFieldElements 254 * 255 * PARAMETERS: AmlType - Type to search 256 * Op - Parent node (Field) 257 * WalkState - Current walk state 258 * 259 * RETURN: Status 260 * 261 * DESCRIPTION: Enter the named elements of the field (children of the parent) 262 * into the namespace. 263 * 264 ******************************************************************************/ 265 266 static ACPI_STATUS 267 LdLoadFieldElements ( 268 UINT32 AmlType, 269 ACPI_PARSE_OBJECT *Op, 270 ACPI_WALK_STATE *WalkState) 271 { 272 ACPI_PARSE_OBJECT *Child = NULL; 273 ACPI_PARSE_OBJECT *SourceRegion; 274 ACPI_NAMESPACE_NODE *Node; 275 ACPI_STATUS Status; 276 277 278 SourceRegion = UtGetArg (Op, 0); 279 if (SourceRegion) 280 { 281 Status = AcpiNsLookup (WalkState->ScopeInfo, 282 SourceRegion->Asl.Value.String, 283 AmlType, ACPI_IMODE_EXECUTE, 284 ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node); 285 if (Status == AE_NOT_FOUND) 286 { 287 /* 288 * If the named object is not found, it means that it is either a 289 * forward reference or the named object does not exist. 290 */ 291 SourceRegion->Asl.CompileFlags |= OP_NOT_FOUND_DURING_LOAD; 292 } 293 } 294 295 /* Get the first named field element */ 296 297 switch (Op->Asl.AmlOpcode) 298 { 299 case AML_BANK_FIELD_OP: 300 301 Child = UtGetArg (Op, 6); 302 break; 303 304 case AML_INDEX_FIELD_OP: 305 306 Child = UtGetArg (Op, 5); 307 break; 308 309 case AML_FIELD_OP: 310 311 Child = UtGetArg (Op, 4); 312 break; 313 314 default: 315 316 /* No other opcodes should arrive here */ 317 318 return (AE_BAD_PARAMETER); 319 } 320 321 /* Enter all elements into the namespace */ 322 323 while (Child) 324 { 325 switch (Child->Asl.AmlOpcode) 326 { 327 case AML_INT_RESERVEDFIELD_OP: 328 case AML_INT_ACCESSFIELD_OP: 329 case AML_INT_CONNECTION_OP: 330 break; 331 332 default: 333 334 Status = AcpiNsLookup (WalkState->ScopeInfo, 335 Child->Asl.Value.String, 336 ACPI_TYPE_LOCAL_REGION_FIELD, 337 ACPI_IMODE_LOAD_PASS1, 338 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 339 ACPI_NS_ERROR_IF_FOUND, NULL, &Node); 340 if (ACPI_FAILURE (Status)) 341 { 342 if (Status != AE_ALREADY_EXISTS) 343 { 344 AslError (ASL_ERROR, ASL_MSG_CORE_EXCEPTION, Child, 345 Child->Asl.Value.String); 346 return (Status); 347 } 348 else if (Status == AE_ALREADY_EXISTS && 349 (Node->Flags & ANOBJ_IS_EXTERNAL)) 350 { 351 Node->Type = (UINT8) ACPI_TYPE_LOCAL_REGION_FIELD; 352 Node->Flags &= ~ANOBJ_IS_EXTERNAL; 353 } 354 else 355 { 356 /* 357 * The name already exists in this scope 358 * But continue processing the elements 359 */ 360 AslDualParseOpError (ASL_WARNING, ASL_MSG_NAME_EXISTS, Child, 361 Child->Asl.Value.String, ASL_MSG_FOUND_HERE, Node->Op, 362 Node->Op->Asl.ExternalName); 363 } 364 } 365 else 366 { 367 Child->Asl.Node = Node; 368 Node->Op = Child; 369 } 370 break; 371 } 372 373 Child = Child->Asl.Next; 374 } 375 376 return (AE_OK); 377 } 378 379 380 /******************************************************************************* 381 * 382 * FUNCTION: LdLoadResourceElements 383 * 384 * PARAMETERS: Op - Parent node (Resource Descriptor) 385 * WalkState - Current walk state 386 * 387 * RETURN: Status 388 * 389 * DESCRIPTION: Enter the named elements of the resource descriptor (children 390 * of the parent) into the namespace. 391 * 392 * NOTE: In the real AML namespace, these named elements never exist. But 393 * we simply use the namespace here as a symbol table so we can look 394 * them up as they are referenced. 395 * 396 ******************************************************************************/ 397 398 static ACPI_STATUS 399 LdLoadResourceElements ( 400 ACPI_PARSE_OBJECT *Op, 401 ACPI_WALK_STATE *WalkState) 402 { 403 ACPI_PARSE_OBJECT *InitializerOp = NULL; 404 ACPI_NAMESPACE_NODE *Node; 405 ACPI_STATUS Status; 406 407 408 /* 409 * Enter the resource name into the namespace. Name must not already exist. 410 * This opens a scope, so later field names are guaranteed to be new/unique. 411 */ 412 Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Asl.Namepath, 413 ACPI_TYPE_LOCAL_RESOURCE, ACPI_IMODE_LOAD_PASS1, 414 ACPI_NS_NO_UPSEARCH | ACPI_NS_ERROR_IF_FOUND, 415 WalkState, &Node); 416 if (ACPI_FAILURE (Status)) 417 { 418 if (Status == AE_ALREADY_EXISTS) 419 { 420 /* Actual node causing the error was saved in ParentMethod */ 421 422 AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, 423 (ACPI_PARSE_OBJECT *) Op->Asl.ParentMethod, 424 Op->Asl.Namepath, ASL_MSG_FOUND_HERE, Node->Op, 425 Node->Op->Asl.ExternalName); 426 return (AE_OK); 427 } 428 return (Status); 429 } 430 431 Node->Value = (UINT32) Op->Asl.Value.Integer; 432 Node->Op = Op; 433 Op->Asl.Node = Node; 434 435 /* 436 * Now enter the predefined fields, for easy lookup when referenced 437 * by the source ASL 438 */ 439 InitializerOp = ASL_GET_CHILD_NODE (Op); 440 while (InitializerOp) 441 { 442 if (InitializerOp->Asl.ExternalName) 443 { 444 Status = AcpiNsLookup (WalkState->ScopeInfo, 445 InitializerOp->Asl.ExternalName, 446 ACPI_TYPE_LOCAL_RESOURCE_FIELD, ACPI_IMODE_LOAD_PASS1, 447 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node); 448 if (ACPI_FAILURE (Status)) 449 { 450 return (Status); 451 } 452 453 /* 454 * Store the field offset and length in the namespace node 455 * so it can be used when the field is referenced 456 */ 457 Node->Value = InitializerOp->Asl.Value.Tag.BitOffset; 458 Node->Length = InitializerOp->Asl.Value.Tag.BitLength; 459 InitializerOp->Asl.Node = Node; 460 Node->Op = InitializerOp; 461 } 462 463 InitializerOp = ASL_GET_PEER_NODE (InitializerOp); 464 } 465 466 return (AE_OK); 467 } 468 469 470 /******************************************************************************* 471 * 472 * FUNCTION: LdNamespace1Begin 473 * 474 * PARAMETERS: ASL_WALK_CALLBACK 475 * 476 * RETURN: Status 477 * 478 * DESCRIPTION: Descending callback used during the parse tree walk. If this 479 * is a named AML opcode, enter into the namespace 480 * 481 ******************************************************************************/ 482 483 static ACPI_STATUS 484 LdNamespace1Begin ( 485 ACPI_PARSE_OBJECT *Op, 486 UINT32 Level, 487 void *Context) 488 { 489 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 490 ACPI_NAMESPACE_NODE *Node; 491 ACPI_PARSE_OBJECT *MethodOp; 492 ACPI_STATUS Status; 493 ACPI_OBJECT_TYPE ObjectType; 494 ACPI_OBJECT_TYPE ActualObjectType = ACPI_TYPE_ANY; 495 char *Path; 496 UINT32 Flags = ACPI_NS_NO_UPSEARCH; 497 ACPI_PARSE_OBJECT *Arg; 498 UINT32 i; 499 BOOLEAN ForceNewScope = FALSE; 500 const ACPI_OPCODE_INFO *OpInfo; 501 ACPI_PARSE_OBJECT *ParentOp; 502 503 504 ACPI_FUNCTION_NAME (LdNamespace1Begin); 505 506 507 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n", 508 Op, Op->Asl.ParseOpName)); 509 510 /* 511 * We are only interested in opcodes that have an associated name 512 * (or multiple names) 513 */ 514 switch (Op->Asl.AmlOpcode) 515 { 516 case AML_INDEX_FIELD_OP: 517 518 Status = LdLoadFieldElements (ACPI_TYPE_LOCAL_REGION_FIELD, Op, WalkState); 519 return (Status); 520 521 case AML_BANK_FIELD_OP: 522 case AML_FIELD_OP: 523 524 Status = LdLoadFieldElements (ACPI_TYPE_REGION, Op, WalkState); 525 return (Status); 526 527 case AML_INT_CONNECTION_OP: 528 529 if (Op->Asl.Child->Asl.AmlOpcode != AML_INT_NAMEPATH_OP) 530 { 531 break; 532 } 533 534 Arg = Op->Asl.Child; 535 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Asl.ExternalName, 536 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, 537 WalkState, &Node); 538 if (ACPI_FAILURE (Status)) 539 { 540 break; 541 } 542 543 break; 544 545 default: 546 547 /* All other opcodes go below */ 548 549 break; 550 } 551 552 /* Check if this object has already been installed in the namespace */ 553 554 if (Op->Asl.Node) 555 { 556 return (AE_OK); 557 } 558 559 /* Check for a possible illegal forward reference */ 560 561 if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || 562 (Op->Asl.ParseOpcode == PARSEOP_NAMESTRING)) 563 { 564 /* 565 * Op->Asl.Namepath will be NULL for these opcodes. 566 * These opcodes are guaranteed to have a parent. 567 * Examine the parent opcode. 568 */ 569 ParentOp = Op->Asl.Parent; 570 OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Asl.AmlOpcode); 571 572 /* 573 * Exclude all operators that actually declare a new name: 574 * Name (ABCD, 1) -> Ignore (AML_CLASS_NAMED_OBJECT) 575 * We only want references to named objects: 576 * Store (2, WXYZ) -> Attempt to resolve the name 577 */ 578 if (OpInfo->Class == AML_CLASS_NAMED_OBJECT) 579 { 580 return (AE_OK); 581 } 582 583 /* 584 * Check if the referenced object exists at this point during 585 * the load: 586 * 1) If it exists, then this cannot be a forward reference. 587 * 2) If it does not exist, it could be a forward reference or 588 * it truly does not exist (and no external declaration). 589 */ 590 Status = AcpiNsLookup (WalkState->ScopeInfo, 591 Op->Asl.Value.Name, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 592 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, 593 WalkState, &Node); 594 if (Status == AE_NOT_FOUND) 595 { 596 /* 597 * This is either a forward reference or the object truly 598 * does not exist. The two cases can only be differentiated 599 * during the cross-reference stage later. Mark the Op/Name 600 * as not-found for now to indicate the need for further 601 * processing. 602 * 603 * Special case: Allow forward references from elements of 604 * Package objects. This provides compatibility with other 605 * ACPI implementations. To correctly implement this, the 606 * ACPICA table load defers package resolution until the entire 607 * namespace has been loaded. 608 */ 609 if ((ParentOp->Asl.ParseOpcode != PARSEOP_PACKAGE) && 610 (ParentOp->Asl.ParseOpcode != PARSEOP_VAR_PACKAGE)) 611 { 612 Op->Asl.CompileFlags |= OP_NOT_FOUND_DURING_LOAD; 613 } 614 615 return (AE_OK); 616 } 617 618 return (Status); 619 } 620 621 Path = Op->Asl.Namepath; 622 if (!Path) 623 { 624 return (AE_OK); 625 } 626 627 /* Map the raw opcode into an internal object type */ 628 629 switch (Op->Asl.ParseOpcode) 630 { 631 case PARSEOP_NAME: 632 633 Arg = Op->Asl.Child; /* Get the NameSeg/NameString node */ 634 Arg = Arg->Asl.Next; /* First peer is the object to be associated with the name */ 635 636 /* 637 * If this name refers to a ResourceTemplate, we will need to open 638 * a new scope so that the resource subfield names can be entered into 639 * the namespace underneath this name 640 */ 641 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC) 642 { 643 ForceNewScope = TRUE; 644 } 645 646 /* Get the data type associated with the named object, not the name itself */ 647 648 /* Log2 loop to convert from Btype (binary) to Etype (encoded) */ 649 650 ObjectType = 1; 651 for (i = 1; i < Arg->Asl.AcpiBtype; i *= 2) 652 { 653 ObjectType++; 654 } 655 break; 656 657 case PARSEOP_EXTERNAL: 658 /* 659 * "External" simply enters a name and type into the namespace. 660 * We must be careful to not open a new scope, however, no matter 661 * what type the external name refers to (e.g., a method) 662 * 663 * first child is name, next child is ObjectType 664 */ 665 ActualObjectType = (UINT8) Op->Asl.Child->Asl.Next->Asl.Value.Integer; 666 ObjectType = ACPI_TYPE_ANY; 667 668 /* 669 * We will mark every new node along the path as "External". This 670 * allows some or all of the nodes to be created later in the ASL 671 * code. Handles cases like this: 672 * 673 * External (\_SB_.PCI0.ABCD, IntObj) 674 * Scope (_SB_) 675 * { 676 * Device (PCI0) 677 * { 678 * } 679 * } 680 * Method (X) 681 * { 682 * Store (\_SB_.PCI0.ABCD, Local0) 683 * } 684 */ 685 Flags |= ACPI_NS_EXTERNAL; 686 break; 687 688 case PARSEOP_DEFAULT_ARG: 689 690 if (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC) 691 { 692 Status = LdLoadResourceElements (Op, WalkState); 693 return_ACPI_STATUS (Status); 694 } 695 696 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 697 break; 698 699 case PARSEOP_SCOPE: 700 /* 701 * The name referenced by Scope(Name) must already exist at this point. 702 * In other words, forward references for Scope() are not supported. 703 * The only real reason for this is that the MS interpreter cannot 704 * handle this case. Perhaps someday this case can go away. 705 */ 706 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY, 707 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, &Node); 708 if (ACPI_FAILURE (Status)) 709 { 710 if (Status == AE_NOT_FOUND) 711 { 712 /* The name was not found, go ahead and create it */ 713 714 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, 715 ACPI_TYPE_LOCAL_SCOPE, ACPI_IMODE_LOAD_PASS1, 716 Flags, WalkState, &Node); 717 if (ACPI_FAILURE (Status)) 718 { 719 return_ACPI_STATUS (Status); 720 } 721 722 /* However, this is an error -- operand to Scope must exist */ 723 724 if (strlen (Op->Asl.ExternalName) == ACPI_NAMESEG_SIZE) 725 { 726 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, 727 Op->Asl.ExternalName); 728 } 729 else 730 { 731 AslError (ASL_ERROR, ASL_MSG_NAMEPATH_NOT_EXIST, Op, 732 Op->Asl.ExternalName); 733 } 734 735 goto FinishNode; 736 } 737 738 AslCoreSubsystemError (Op, Status, 739 "Failure from namespace lookup", FALSE); 740 741 return_ACPI_STATUS (Status); 742 } 743 else /* Status AE_OK */ 744 { 745 /* 746 * Do not allow references to external scopes from the DSDT. 747 * This is because the DSDT is always loaded first, and the 748 * external reference cannot be resolved -- causing a runtime 749 * error because Scope() must be resolved immediately. 750 * 10/2015. 751 */ 752 if ((Node->Flags & ANOBJ_IS_EXTERNAL) && 753 (ACPI_COMPARE_NAMESEG (AslGbl_TableSignature, "DSDT"))) 754 { 755 /* However, allowed if the reference is within a method */ 756 757 MethodOp = Op->Asl.Parent; 758 while (MethodOp && 759 (MethodOp->Asl.ParseOpcode != PARSEOP_METHOD)) 760 { 761 MethodOp = MethodOp->Asl.Parent; 762 } 763 764 if (!MethodOp) 765 { 766 /* Not in a control method, error */ 767 768 AslError (ASL_ERROR, ASL_MSG_CROSS_TABLE_SCOPE, Op, NULL); 769 } 770 } 771 } 772 773 /* We found a node with this name, now check the type */ 774 775 switch (Node->Type) 776 { 777 case ACPI_TYPE_LOCAL_SCOPE: 778 case ACPI_TYPE_DEVICE: 779 case ACPI_TYPE_POWER: 780 case ACPI_TYPE_PROCESSOR: 781 case ACPI_TYPE_THERMAL: 782 783 /* These are acceptable types - they all open a new scope */ 784 break; 785 786 case ACPI_TYPE_INTEGER: 787 case ACPI_TYPE_STRING: 788 case ACPI_TYPE_BUFFER: 789 /* 790 * These types we will allow, but we will change the type. 791 * This enables some existing code of the form: 792 * 793 * Name (DEB, 0) 794 * Scope (DEB) { ... } 795 * 796 * Which is used to workaround the fact that the MS interpreter 797 * does not allow Scope() forward references. 798 */ 799 sprintf (AslGbl_MsgBuffer, "%s [%s], changing type to [Scope]", 800 Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type)); 801 AslError (ASL_REMARK, ASL_MSG_SCOPE_TYPE, Op, AslGbl_MsgBuffer); 802 803 /* Switch the type to scope, open the new scope */ 804 805 Node->Type = ACPI_TYPE_LOCAL_SCOPE; 806 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE, 807 WalkState); 808 if (ACPI_FAILURE (Status)) 809 { 810 return_ACPI_STATUS (Status); 811 } 812 break; 813 814 default: 815 816 /* All other types are an error */ 817 818 sprintf (AslGbl_MsgBuffer, "%s [%s]", Op->Asl.ExternalName, 819 AcpiUtGetTypeName (Node->Type)); 820 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, AslGbl_MsgBuffer); 821 822 /* 823 * However, switch the type to be an actual scope so 824 * that compilation can continue without generating a whole 825 * cascade of additional errors. Open the new scope. 826 */ 827 Node->Type = ACPI_TYPE_LOCAL_SCOPE; 828 Status = AcpiDsScopeStackPush (Node, ACPI_TYPE_LOCAL_SCOPE, 829 WalkState); 830 if (ACPI_FAILURE (Status)) 831 { 832 return_ACPI_STATUS (Status); 833 } 834 break; 835 } 836 837 Status = AE_OK; 838 goto FinishNode; 839 840 default: 841 842 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 843 break; 844 } 845 846 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Loading name: %s, (%s)\n", 847 Op->Asl.ExternalName, AcpiUtGetTypeName (ObjectType))); 848 849 /* The name must not already exist */ 850 851 Flags |= ACPI_NS_ERROR_IF_FOUND; 852 853 /* 854 * For opcodes that enter new names into the namespace, 855 * all prefix NameSegs must exist. 856 */ 857 WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 858 if (((WalkState->OpInfo->Flags & AML_NAMED) || 859 (WalkState->OpInfo->Flags & AML_CREATE)) && 860 (Op->Asl.AmlOpcode != AML_EXTERNAL_OP)) 861 { 862 Flags |= ACPI_NS_PREFIX_MUST_EXIST; 863 } 864 865 /* 866 * Enter the named type into the internal namespace. We enter the name 867 * as we go downward in the parse tree. Any necessary subobjects that 868 * involve arguments to the opcode must be created as we go back up the 869 * parse tree later. 870 */ 871 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType, 872 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); 873 if (ACPI_FAILURE (Status)) 874 { 875 if (Status == AE_ALREADY_EXISTS) 876 { 877 /* The name already exists in this scope */ 878 879 if (Node->Type == ACPI_TYPE_LOCAL_SCOPE) 880 { 881 /* Allow multiple references to the same scope */ 882 883 Node->Type = (UINT8) ObjectType; 884 Status = AE_OK; 885 } 886 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) && 887 (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL)) 888 { 889 /* 890 * Allow one create on an object or segment that was 891 * previously declared External 892 */ 893 Node->Flags &= ~ANOBJ_IS_EXTERNAL; 894 Node->Type = (UINT8) ObjectType; 895 896 /* Just retyped a node, probably will need to open a scope */ 897 898 if (AcpiNsOpensScope (ObjectType)) 899 { 900 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); 901 if (ACPI_FAILURE (Status)) 902 { 903 return_ACPI_STATUS (Status); 904 } 905 } 906 907 Status = AE_OK; 908 } 909 else if (!(Node->Flags & ANOBJ_IS_EXTERNAL) && 910 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) 911 { 912 /* 913 * Allow externals in same scope as the definition of the 914 * actual object. Similar to C. Allows multiple definition 915 * blocks that refer to each other in the same file. 916 */ 917 Status = AE_OK; 918 } 919 else if ((Node->Flags & ANOBJ_IS_EXTERNAL) && 920 (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL) && 921 (ObjectType == ACPI_TYPE_ANY)) 922 { 923 /* Allow update of externals of unknown type. */ 924 925 if (AcpiNsOpensScope (ActualObjectType)) 926 { 927 Node->Type = (UINT8) ActualObjectType; 928 Status = AE_OK; 929 } 930 else 931 { 932 sprintf (AslGbl_MsgBuffer, "%s [%s]", Op->Asl.ExternalName, 933 AcpiUtGetTypeName (Node->Type)); 934 AslError (ASL_ERROR, ASL_MSG_SCOPE_TYPE, Op, AslGbl_MsgBuffer); 935 return_ACPI_STATUS (AE_OK); 936 } 937 } 938 else 939 { 940 /* Valid error, object already exists */ 941 942 AslDualParseOpError (ASL_ERROR, ASL_MSG_NAME_EXISTS, Op, 943 Op->Asl.ExternalName, ASL_MSG_FOUND_HERE, Node->Op, 944 Node->Op->Asl.ExternalName); 945 return_ACPI_STATUS (AE_OK); 946 } 947 } 948 else if (AE_NOT_FOUND) 949 { 950 /* 951 * One or more prefix NameSegs of the NamePath do not exist 952 * (all of them must exist). Attempt to continue compilation 953 * by setting the current scope to the root. 954 */ 955 Node = AcpiGbl_RootNode; 956 Status = AE_OK; 957 } 958 else 959 { 960 /* Flag all other errors as coming from the ACPICA core */ 961 962 AslCoreSubsystemError (Op, Status, 963 "Failure from namespace lookup", FALSE); 964 return_ACPI_STATUS (Status); 965 } 966 } 967 968 /* Check special names like _WAK and _PTS */ 969 970 LdCheckSpecialNames (Node, Op); 971 972 if (ForceNewScope) 973 { 974 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); 975 if (ACPI_FAILURE (Status)) 976 { 977 return_ACPI_STATUS (Status); 978 } 979 } 980 981 FinishNode: 982 /* 983 * Point the parse node to the new namespace node, and point 984 * the Node back to the original Parse node 985 */ 986 Op->Asl.Node = Node; 987 Node->Op = Op; 988 989 /* Set the actual data type if appropriate (EXTERNAL term only) */ 990 991 if (ActualObjectType != ACPI_TYPE_ANY) 992 { 993 Node->Type = (UINT8) ActualObjectType; 994 Node->Value = ASL_EXTERNAL_METHOD; 995 } 996 997 if (Op->Asl.ParseOpcode == PARSEOP_METHOD) 998 { 999 /* 1000 * Get the method argument count from "Extra" and save 1001 * it in the namespace node 1002 */ 1003 Node->Value = (UINT32) Op->Asl.Extra; 1004 } 1005 1006 return_ACPI_STATUS (Status); 1007 } 1008 1009 1010 /******************************************************************************* 1011 * 1012 * FUNCTION: LdCheckSpecialNames 1013 * 1014 * PARAMETERS: Node - Node that represents the named object 1015 * Op - Named object declaring this named object 1016 * 1017 * RETURN: None 1018 * 1019 * DESCRIPTION: Check if certain named objects are declared in the incorrect 1020 * scope. Special named objects are listed in 1021 * AslGbl_SpecialNamedObjects and can only be declared at the root 1022 * scope. _UID inside of a processor declaration must not be a 1023 * string. 1024 * 1025 ******************************************************************************/ 1026 1027 static void 1028 LdCheckSpecialNames ( 1029 ACPI_NAMESPACE_NODE *Node, 1030 ACPI_PARSE_OBJECT *Op) 1031 { 1032 UINT32 i; 1033 1034 1035 for (i = 0; i < MAX_SPECIAL_NAMES; i++) 1036 { 1037 if (ACPI_COMPARE_NAMESEG(Node->Name.Ascii, AslGbl_SpecialNamedObjects[i]) && 1038 Node->Parent != AcpiGbl_RootNode) 1039 { 1040 AslError (ASL_ERROR, ASL_MSG_INVALID_SPECIAL_NAME, Op, Op->Asl.ExternalName); 1041 return; 1042 } 1043 } 1044 1045 if (ACPI_COMPARE_NAMESEG (Node->Name.Ascii, "_UID") && 1046 Node->Parent->Type == ACPI_TYPE_PROCESSOR && 1047 Node->Type == ACPI_TYPE_STRING) 1048 { 1049 AslError (ASL_ERROR, ASL_MSG_INVALID_PROCESSOR_UID , Op, "found a string"); 1050 } 1051 } 1052 1053 1054 /******************************************************************************* 1055 * 1056 * FUNCTION: LdNamespace2Begin 1057 * 1058 * PARAMETERS: ASL_WALK_CALLBACK 1059 * 1060 * RETURN: Status 1061 * 1062 * DESCRIPTION: Descending callback used during the pass 2 parse tree walk. 1063 * Second pass resolves some forward references. 1064 * 1065 * Notes: 1066 * Currently only needs to handle the Alias operator. 1067 * Could be used to allow forward references from the Scope() operator, but 1068 * the MS interpreter does not allow this, so this compiler does not either. 1069 * 1070 ******************************************************************************/ 1071 1072 static ACPI_STATUS 1073 LdNamespace2Begin ( 1074 ACPI_PARSE_OBJECT *Op, 1075 UINT32 Level, 1076 void *Context) 1077 { 1078 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 1079 ACPI_STATUS Status; 1080 ACPI_NAMESPACE_NODE *Node; 1081 ACPI_OBJECT_TYPE ObjectType; 1082 BOOLEAN ForceNewScope = FALSE; 1083 ACPI_PARSE_OBJECT *Arg; 1084 char *Path; 1085 ACPI_NAMESPACE_NODE *TargetNode; 1086 1087 1088 ACPI_FUNCTION_NAME (LdNamespace2Begin); 1089 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op %p [%s]\n", 1090 Op, Op->Asl.ParseOpName)); 1091 1092 1093 /* Ignore Ops with no namespace node */ 1094 1095 Node = Op->Asl.Node; 1096 if (!Node) 1097 { 1098 return (AE_OK); 1099 } 1100 1101 /* Get the type to determine if we should push the scope */ 1102 1103 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) && 1104 (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC)) 1105 { 1106 ObjectType = ACPI_TYPE_LOCAL_RESOURCE; 1107 } 1108 else 1109 { 1110 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 1111 } 1112 1113 /* Push scope for Resource Templates */ 1114 1115 if (Op->Asl.ParseOpcode == PARSEOP_NAME) 1116 { 1117 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC) 1118 { 1119 ForceNewScope = TRUE; 1120 } 1121 } 1122 1123 /* Push the scope stack */ 1124 1125 if (ForceNewScope || AcpiNsOpensScope (ObjectType)) 1126 { 1127 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); 1128 if (ACPI_FAILURE (Status)) 1129 { 1130 return_ACPI_STATUS (Status); 1131 } 1132 } 1133 1134 if (Op->Asl.ParseOpcode == PARSEOP_ALIAS) 1135 { 1136 /* 1137 * Complete the alias node by getting and saving the target node. 1138 * First child is the alias target 1139 */ 1140 Arg = Op->Asl.Child; 1141 1142 /* Get the target pathname */ 1143 1144 Path = Arg->Asl.Namepath; 1145 if (!Path) 1146 { 1147 Status = UtInternalizeName (Arg->Asl.ExternalName, &Path); 1148 if (ACPI_FAILURE (Status)) 1149 { 1150 return (Status); 1151 } 1152 } 1153 1154 /* Get the NS node associated with the target. It must exist. */ 1155 1156 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY, 1157 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, 1158 WalkState, &TargetNode); 1159 if (ACPI_FAILURE (Status)) 1160 { 1161 if (Status == AE_NOT_FOUND) 1162 { 1163 /* Standalone NameSeg vs. NamePath */ 1164 1165 if (strlen (Arg->Asl.ExternalName) == ACPI_NAMESEG_SIZE) 1166 { 1167 AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, 1168 Arg->Asl.ExternalName); 1169 } 1170 else 1171 { 1172 AslError (ASL_ERROR, ASL_MSG_NAMEPATH_NOT_EXIST, Op, 1173 Arg->Asl.ExternalName); 1174 } 1175 1176 #if 0 1177 /* 1178 * NOTE: Removed 10/2018 to enhance compiler error reporting. No 1179 * regressions seen. 1180 */ 1181 /* 1182 * The name was not found, go ahead and create it. 1183 * This prevents more errors later. 1184 */ 1185 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, 1186 ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1, 1187 ACPI_NS_NO_UPSEARCH, WalkState, &Node); 1188 #endif 1189 return (Status); 1190 /* Removed: return (AE_OK)*/ 1191 } 1192 1193 AslCoreSubsystemError (Op, Status, 1194 "Failure from namespace lookup", FALSE); 1195 return (AE_OK); 1196 } 1197 1198 /* Save the target node within the alias node */ 1199 1200 Node->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode); 1201 } 1202 1203 return (AE_OK); 1204 } 1205 1206 1207 /******************************************************************************* 1208 * 1209 * FUNCTION: LdCommonNamespaceEnd 1210 * 1211 * PARAMETERS: ASL_WALK_CALLBACK 1212 * 1213 * RETURN: Status 1214 * 1215 * DESCRIPTION: Ascending callback used during the loading of the namespace, 1216 * We only need to worry about managing the scope stack here. 1217 * 1218 ******************************************************************************/ 1219 1220 static ACPI_STATUS 1221 LdCommonNamespaceEnd ( 1222 ACPI_PARSE_OBJECT *Op, 1223 UINT32 Level, 1224 void *Context) 1225 { 1226 ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; 1227 ACPI_OBJECT_TYPE ObjectType; 1228 BOOLEAN ForceNewScope = FALSE; 1229 1230 1231 ACPI_FUNCTION_NAME (LdCommonNamespaceEnd); 1232 1233 1234 /* We are only interested in opcodes that have an associated name */ 1235 1236 if (!Op->Asl.Namepath) 1237 { 1238 return (AE_OK); 1239 } 1240 1241 /* Get the type to determine if we should pop the scope */ 1242 1243 if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) && 1244 (Op->Asl.CompileFlags == OP_IS_RESOURCE_DESC)) 1245 { 1246 /* TBD: Merge into AcpiDsMapNamedOpcodeToDataType */ 1247 1248 ObjectType = ACPI_TYPE_LOCAL_RESOURCE; 1249 } 1250 else 1251 { 1252 ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); 1253 } 1254 1255 /* Pop scope that was pushed for Resource Templates */ 1256 1257 if (Op->Asl.ParseOpcode == PARSEOP_NAME) 1258 { 1259 if (Op->Asl.CompileFlags & OP_IS_RESOURCE_DESC) 1260 { 1261 ForceNewScope = TRUE; 1262 } 1263 } 1264 1265 /* Pop the scope stack */ 1266 1267 if (ForceNewScope || AcpiNsOpensScope (ObjectType)) 1268 { 1269 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 1270 "(%s): Popping scope for Op [%s] %p\n", 1271 AcpiUtGetTypeName (ObjectType), Op->Asl.ParseOpName, Op)); 1272 1273 (void) AcpiDsScopeStackPop (WalkState); 1274 } 1275 1276 return (AE_OK); 1277 } 1278