1 /****************************************************************************** 2 * 3 * Module Name: asltree - Parse tree management 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "aslcompiler.h" 153 #include "aslcompiler.y.h" 154 #include "acapps.h" 155 156 #define _COMPONENT ACPI_COMPILER 157 ACPI_MODULE_NAME ("asltree") 158 159 160 /******************************************************************************* 161 * 162 * FUNCTION: TrSetOpIntegerValue 163 * 164 * PARAMETERS: ParseOpcode - New opcode to be assigned to the op 165 * Op - An existing parse op 166 * 167 * RETURN: The updated op 168 * 169 * DESCRIPTION: Used to set the integer value of a op, 170 * usually to a specific size (8, 16, 32, or 64 bits) 171 * 172 ******************************************************************************/ 173 174 ACPI_PARSE_OBJECT * 175 TrSetOpIntegerValue ( 176 UINT32 ParseOpcode, 177 ACPI_PARSE_OBJECT *Op) 178 { 179 180 if (!Op) 181 { 182 return (NULL); 183 } 184 185 DbgPrint (ASL_PARSE_OUTPUT, 186 "\nUpdateOp: Old - %s, New - %s\n", 187 UtGetOpName (Op->Asl.ParseOpcode), 188 UtGetOpName (ParseOpcode)); 189 190 /* Assign new opcode and name */ 191 192 if (Op->Asl.ParseOpcode == PARSEOP_ONES) 193 { 194 switch (ParseOpcode) 195 { 196 case PARSEOP_BYTECONST: 197 198 Op->Asl.Value.Integer = ACPI_UINT8_MAX; 199 break; 200 201 case PARSEOP_WORDCONST: 202 203 Op->Asl.Value.Integer = ACPI_UINT16_MAX; 204 break; 205 206 case PARSEOP_DWORDCONST: 207 208 Op->Asl.Value.Integer = ACPI_UINT32_MAX; 209 break; 210 211 /* Don't need to do the QWORD case */ 212 213 default: 214 215 /* Don't care about others */ 216 break; 217 } 218 } 219 220 Op->Asl.ParseOpcode = (UINT16) ParseOpcode; 221 UtSetParseOpName (Op); 222 223 /* 224 * For the BYTE, WORD, and DWORD constants, make sure that the integer 225 * that was passed in will actually fit into the data type 226 */ 227 switch (ParseOpcode) 228 { 229 case PARSEOP_BYTECONST: 230 231 UtCheckIntegerRange (Op, 0x00, ACPI_UINT8_MAX); 232 Op->Asl.Value.Integer &= ACPI_UINT8_MAX; 233 break; 234 235 case PARSEOP_WORDCONST: 236 237 UtCheckIntegerRange (Op, 0x00, ACPI_UINT16_MAX); 238 Op->Asl.Value.Integer &= ACPI_UINT16_MAX; 239 break; 240 241 case PARSEOP_DWORDCONST: 242 243 UtCheckIntegerRange (Op, 0x00, ACPI_UINT32_MAX); 244 Op->Asl.Value.Integer &= ACPI_UINT32_MAX; 245 break; 246 247 default: 248 249 /* Don't care about others, don't need to check QWORD */ 250 251 break; 252 } 253 254 /* Converter: if this is a method invocation, turn off capture comments */ 255 256 if (AcpiGbl_CaptureComments && 257 (ParseOpcode == PARSEOP_METHODCALL)) 258 { 259 Gbl_CommentState.CaptureComments = FALSE; 260 } 261 262 return (Op); 263 } 264 265 266 /******************************************************************************* 267 * 268 * FUNCTION: TrSetOpFlags 269 * 270 * PARAMETERS: Op - An existing parse op 271 * Flags - New flags word 272 * 273 * RETURN: The updated parser op 274 * 275 * DESCRIPTION: Set bits in the op flags word. Will not clear bits, only set 276 * 277 ******************************************************************************/ 278 279 ACPI_PARSE_OBJECT * 280 TrSetOpFlags ( 281 ACPI_PARSE_OBJECT *Op, 282 UINT32 Flags) 283 { 284 285 if (!Op) 286 { 287 return (NULL); 288 } 289 290 DbgPrint (ASL_PARSE_OUTPUT, 291 "\nSetOpFlags: %s Op %p, %8.8X", Op->Asl.ParseOpName, Op, Flags); 292 293 TrPrintOpFlags (Flags, ASL_PARSE_OUTPUT); 294 DbgPrint (ASL_PARSE_OUTPUT, "\n\n"); 295 296 Op->Asl.CompileFlags |= Flags; 297 return (Op); 298 } 299 300 301 /******************************************************************************* 302 * 303 * FUNCTION: TrSetOpAmlLength 304 * 305 * PARAMETERS: Op - An existing parse op 306 * Length - AML Length 307 * 308 * RETURN: The updated parser op 309 * 310 * DESCRIPTION: Set the AML Length in a op. Used by the parser to indicate 311 * the presence of a op that must be reduced to a fixed length 312 * constant. 313 * 314 ******************************************************************************/ 315 316 ACPI_PARSE_OBJECT * 317 TrSetOpAmlLength ( 318 ACPI_PARSE_OBJECT *Op, 319 UINT32 Length) 320 { 321 322 DbgPrint (ASL_PARSE_OUTPUT, 323 "\nSetOpAmlLength: Op %p, %8.8X\n", Op, Length); 324 325 if (!Op) 326 { 327 return (NULL); 328 } 329 330 Op->Asl.AmlLength = Length; 331 return (Op); 332 } 333 334 335 /******************************************************************************* 336 * 337 * FUNCTION: TrSetOpParent 338 * 339 * PARAMETERS: Op - To be set to new parent 340 * ParentOp - The parent 341 * 342 * RETURN: None, sets Op parent directly 343 * 344 * DESCRIPTION: Change the parent of a parse op. 345 * 346 ******************************************************************************/ 347 348 void 349 TrSetOpParent ( 350 ACPI_PARSE_OBJECT *Op, 351 ACPI_PARSE_OBJECT *ParentOp) 352 { 353 354 Op->Asl.Parent = ParentOp; 355 } 356 357 358 /******************************************************************************* 359 * 360 * FUNCTION: TrSetOpCurrentFilename 361 * 362 * PARAMETERS: Op - An existing parse op 363 * 364 * RETURN: None 365 * 366 * DESCRIPTION: Save the include file filename. Used for debug output only. 367 * 368 ******************************************************************************/ 369 370 void 371 TrSetOpCurrentFilename ( 372 ACPI_PARSE_OBJECT *Op) 373 { 374 375 Op->Asl.Filename = Gbl_PreviousIncludeFilename; 376 } 377 378 379 /******************************************************************************* 380 * 381 * FUNCTION: TrSetOpIntegerWidth 382 * 383 * PARAMETERS: Op - An existing parse op 384 * 385 * RETURN: None 386 * 387 * DESCRIPTION: 388 * 389 ******************************************************************************/ 390 391 void 392 TrSetOpIntegerWidth ( 393 ACPI_PARSE_OBJECT *TableSignatureOp, 394 ACPI_PARSE_OBJECT *RevisionOp) 395 { 396 397 /* TBD: Check table sig? (DSDT vs. SSDT) */ 398 399 /* Handle command-line version override */ 400 401 if (Gbl_RevisionOverride) 402 { 403 AcpiUtSetIntegerWidth (Gbl_RevisionOverride); 404 } 405 else 406 { 407 AcpiUtSetIntegerWidth ((UINT8) RevisionOp->Asl.Value.Integer); 408 } 409 } 410 411 412 /******************************************************************************* 413 * 414 * FUNCTION: TrSetOpEndLineNumber 415 * 416 * PARAMETERS: Op - An existing parse op 417 * 418 * RETURN: None. 419 * 420 * DESCRIPTION: Set the ending line numbers (file line and logical line) of a 421 * parse op to the current line numbers. 422 * 423 ******************************************************************************/ 424 425 void 426 TrSetOpEndLineNumber ( 427 ACPI_PARSE_OBJECT *Op) 428 { 429 430 /* If the end line # is already set, just return */ 431 432 if (Op->Asl.EndLine) 433 { 434 return; 435 } 436 437 Op->Asl.EndLine = Gbl_CurrentLineNumber; 438 Op->Asl.EndLogicalLine = Gbl_LogicalLineNumber; 439 } 440 441 442 /******************************************************************************* 443 * 444 * FUNCTION: TrLinkOpChildren 445 * 446 * PARAMETERS: Op - An existing parse op 447 * NumChildren - Number of children to follow 448 * ... - A list of child ops to link to the new 449 * op. NumChildren long. 450 * 451 * RETURN: The updated (linked) op 452 * 453 * DESCRIPTION: Link a group of ops to an existing parse op 454 * 455 ******************************************************************************/ 456 457 ACPI_PARSE_OBJECT * 458 TrLinkOpChildren ( 459 ACPI_PARSE_OBJECT *Op, 460 UINT32 NumChildren, 461 ...) 462 { 463 ACPI_PARSE_OBJECT *Child; 464 ACPI_PARSE_OBJECT *PrevChild; 465 va_list ap; 466 UINT32 i; 467 BOOLEAN FirstChild; 468 469 470 va_start (ap, NumChildren); 471 472 TrSetOpEndLineNumber (Op); 473 474 DbgPrint (ASL_PARSE_OUTPUT, 475 "\nLinkChildren Line [%u to %u] NewParent %p Child %u Op %s ", 476 Op->Asl.LineNumber, Op->Asl.EndLine, 477 Op, NumChildren, UtGetOpName(Op->Asl.ParseOpcode)); 478 479 switch (Op->Asl.ParseOpcode) 480 { 481 case PARSEOP_ASL_CODE: 482 483 Gbl_ParseTreeRoot = Op; 484 Op->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG; 485 DbgPrint (ASL_PARSE_OUTPUT, "ASLCODE (Tree Completed)->"); 486 break; 487 488 case PARSEOP_DEFINITION_BLOCK: 489 490 DbgPrint (ASL_PARSE_OUTPUT, "DEFINITION_BLOCK (Tree Completed)->"); 491 break; 492 493 case PARSEOP_OPERATIONREGION: 494 495 DbgPrint (ASL_PARSE_OUTPUT, "OPREGION->"); 496 break; 497 498 case PARSEOP_OR: 499 500 DbgPrint (ASL_PARSE_OUTPUT, "OR->"); 501 break; 502 503 default: 504 505 /* Nothing to do for other opcodes */ 506 507 break; 508 } 509 510 /* The following is for capturing comments */ 511 512 if (AcpiGbl_CaptureComments) 513 { 514 /* 515 * If there are "regular comments" detected at this point, 516 * then is an endBlk comment. Categorize it as so and distribute 517 * all regular comments to this parse op. 518 */ 519 if (Gbl_CommentListHead) 520 { 521 Op->Asl.EndBlkComment = Gbl_CommentListHead; 522 CvDbgPrint ("EndBlk Comment for %s: %s", 523 Op->Asl.ParseOpName, Gbl_CommentListHead->Comment); 524 Gbl_CommentListHead = NULL; 525 Gbl_CommentListTail = NULL; 526 } 527 } 528 529 /* Link the new op to it's children */ 530 531 PrevChild = NULL; 532 FirstChild = TRUE; 533 for (i = 0; i < NumChildren; i++) 534 { 535 Child = va_arg (ap, ACPI_PARSE_OBJECT *); 536 537 if ((Child == PrevChild) && (Child != NULL)) 538 { 539 AslError (ASL_WARNING, ASL_MSG_COMPILER_INTERNAL, Child, 540 "Child op list invalid"); 541 va_end(ap); 542 return (Op); 543 } 544 545 DbgPrint (ASL_PARSE_OUTPUT, "%p, ", Child); 546 547 /* 548 * If child is NULL, this means that an optional argument 549 * was omitted. We must create a placeholder with a special 550 * opcode (DEFAULT_ARG) so that the code generator will know 551 * that it must emit the correct default for this argument 552 */ 553 if (!Child) 554 { 555 Child = TrAllocateOp (PARSEOP_DEFAULT_ARG); 556 } 557 558 /* Link first child to parent */ 559 560 if (FirstChild) 561 { 562 FirstChild = FALSE; 563 Op->Asl.Child = Child; 564 } 565 566 /* Point all children to parent */ 567 568 Child->Asl.Parent = Op; 569 570 /* Link children in a peer list */ 571 572 if (PrevChild) 573 { 574 PrevChild->Asl.Next = Child; 575 } 576 577 /* 578 * This child might be a list, point all ops in the list 579 * to the same parent 580 */ 581 while (Child->Asl.Next) 582 { 583 Child = Child->Asl.Next; 584 Child->Asl.Parent = Op; 585 } 586 587 PrevChild = Child; 588 } 589 590 va_end(ap); 591 DbgPrint (ASL_PARSE_OUTPUT, "\n\n"); 592 593 if (AcpiGbl_CaptureComments) 594 { 595 Gbl_CommentState.LatestParseOp = Op; 596 CvDbgPrint ("TrLinkOpChildren=====Set latest parse op to this op.\n"); 597 } 598 599 return (Op); 600 } 601 602 603 /******************************************************************************* 604 * 605 * FUNCTION: TrLinkPeerOp 606 * 607 * PARAMETERS: Op1 - First peer 608 * Op2 - Second peer 609 * 610 * RETURN: Op1 or the non-null op. 611 * 612 * DESCRIPTION: Link two ops as peers. Handles cases where one peer is null. 613 * 614 ******************************************************************************/ 615 616 ACPI_PARSE_OBJECT * 617 TrLinkPeerOp ( 618 ACPI_PARSE_OBJECT *Op1, 619 ACPI_PARSE_OBJECT *Op2) 620 { 621 ACPI_PARSE_OBJECT *Next; 622 623 624 DbgPrint (ASL_PARSE_OUTPUT, 625 "\nLinkPeerOp: 1=%p (%s), 2=%p (%s)\n", 626 Op1, Op1 ? UtGetOpName(Op1->Asl.ParseOpcode) : NULL, 627 Op2, Op2 ? UtGetOpName(Op2->Asl.ParseOpcode) : NULL); 628 629 630 if ((!Op1) && (!Op2)) 631 { 632 DbgPrint (ASL_PARSE_OUTPUT, "\nTwo Null ops!\n"); 633 return (Op1); 634 } 635 636 /* If one of the ops is null, just return the non-null op */ 637 638 if (!Op2) 639 { 640 return (Op1); 641 } 642 643 if (!Op1) 644 { 645 return (Op2); 646 } 647 648 if (Op1 == Op2) 649 { 650 DbgPrint (ASL_DEBUG_OUTPUT, 651 "\n************* Internal error, linking op to itself %p\n", 652 Op1); 653 AslError (ASL_WARNING, ASL_MSG_COMPILER_INTERNAL, Op1, 654 "Linking op to itself"); 655 return (Op1); 656 } 657 658 Op1->Asl.Parent = Op2->Asl.Parent; 659 660 /* 661 * Op 1 may already have a peer list (such as an IF/ELSE pair), 662 * so we must walk to the end of the list and attach the new 663 * peer at the end 664 */ 665 Next = Op1; 666 while (Next->Asl.Next) 667 { 668 Next = Next->Asl.Next; 669 } 670 671 Next->Asl.Next = Op2; 672 return (Op1); 673 } 674 675 676 /******************************************************************************* 677 * 678 * FUNCTION: TrLinkPeerOps 679 * 680 * PARAMETERS: NumPeers - The number of ops in the list to follow 681 * ... - A list of ops to link together as peers 682 * 683 * RETURN: The first op in the list (head of the peer list) 684 * 685 * DESCRIPTION: Link together an arbitrary number of peer ops. 686 * 687 ******************************************************************************/ 688 689 ACPI_PARSE_OBJECT * 690 TrLinkPeerOps ( 691 UINT32 NumPeers, 692 ...) 693 { 694 ACPI_PARSE_OBJECT *This; 695 ACPI_PARSE_OBJECT *Next; 696 va_list ap; 697 UINT32 i; 698 ACPI_PARSE_OBJECT *Start; 699 700 701 DbgPrint (ASL_PARSE_OUTPUT, 702 "\nLinkPeerOps: (%u) ", NumPeers); 703 704 va_start (ap, NumPeers); 705 This = va_arg (ap, ACPI_PARSE_OBJECT *); 706 Start = This; 707 708 /* 709 * Link all peers 710 */ 711 for (i = 0; i < (NumPeers -1); i++) 712 { 713 DbgPrint (ASL_PARSE_OUTPUT, "%u=%p ", (i+1), This); 714 715 while (This->Asl.Next) 716 { 717 This = This->Asl.Next; 718 } 719 720 /* Get another peer op */ 721 722 Next = va_arg (ap, ACPI_PARSE_OBJECT *); 723 if (!Next) 724 { 725 Next = TrAllocateOp (PARSEOP_DEFAULT_ARG); 726 } 727 728 /* link new op to the current op */ 729 730 This->Asl.Next = Next; 731 This = Next; 732 } 733 734 va_end (ap); 735 DbgPrint (ASL_PARSE_OUTPUT,"\n"); 736 return (Start); 737 } 738 739 740 /******************************************************************************* 741 * 742 * FUNCTION: TrLinkChildOp 743 * 744 * PARAMETERS: Op1 - Parent op 745 * Op2 - Op to become a child 746 * 747 * RETURN: The parent op 748 * 749 * DESCRIPTION: Link two ops together as a parent and child 750 * 751 ******************************************************************************/ 752 753 ACPI_PARSE_OBJECT * 754 TrLinkChildOp ( 755 ACPI_PARSE_OBJECT *Op1, 756 ACPI_PARSE_OBJECT *Op2) 757 { 758 ACPI_PARSE_OBJECT *Next; 759 760 761 DbgPrint (ASL_PARSE_OUTPUT, 762 "\nLinkChildOp: Parent=%p (%s), Child=%p (%s)\n", 763 Op1, Op1 ? UtGetOpName(Op1->Asl.ParseOpcode): NULL, 764 Op2, Op2 ? UtGetOpName(Op2->Asl.ParseOpcode): NULL); 765 766 /* 767 * Converter: if TrLinkChildOp is called to link a method call, 768 * turn on capture comments as it signifies that we are done parsing 769 * a method call. 770 */ 771 if (AcpiGbl_CaptureComments && Op1) 772 { 773 if (Op1->Asl.ParseOpcode == PARSEOP_METHODCALL) 774 { 775 Gbl_CommentState.CaptureComments = TRUE; 776 } 777 Gbl_CommentState.LatestParseOp = Op1; 778 } 779 780 if (!Op1 || !Op2) 781 { 782 return (Op1); 783 } 784 785 Op1->Asl.Child = Op2; 786 787 /* Set the child and all peers of the child to point to the parent */ 788 789 Next = Op2; 790 while (Next) 791 { 792 Next->Asl.Parent = Op1; 793 Next = Next->Asl.Next; 794 } 795 796 return (Op1); 797 } 798 799 800 /******************************************************************************* 801 * 802 * FUNCTION: TrWalkParseTree 803 * 804 * PARAMETERS: Op - Walk starting point 805 * Visitation - Type of walk 806 * DescendingCallback - Called during tree descent 807 * AscendingCallback - Called during tree ascent 808 * Context - To be passed to the callbacks 809 * 810 * RETURN: Status from callback(s) 811 * 812 * DESCRIPTION: Walk the entire parse tree. 813 * 814 ******************************************************************************/ 815 816 ACPI_STATUS 817 TrWalkParseTree ( 818 ACPI_PARSE_OBJECT *Op, 819 UINT32 Visitation, 820 ASL_WALK_CALLBACK DescendingCallback, 821 ASL_WALK_CALLBACK AscendingCallback, 822 void *Context) 823 { 824 UINT32 Level; 825 BOOLEAN OpPreviouslyVisited; 826 ACPI_PARSE_OBJECT *StartOp = Op; 827 ACPI_STATUS Status; 828 829 830 if (!Gbl_ParseTreeRoot) 831 { 832 return (AE_OK); 833 } 834 835 Level = 0; 836 OpPreviouslyVisited = FALSE; 837 838 switch (Visitation) 839 { 840 case ASL_WALK_VISIT_DOWNWARD: 841 842 while (Op) 843 { 844 if (!OpPreviouslyVisited) 845 { 846 /* Let the callback process the op. */ 847 848 Status = DescendingCallback (Op, Level, Context); 849 if (ACPI_SUCCESS (Status)) 850 { 851 /* Visit children first, once */ 852 853 if (Op->Asl.Child) 854 { 855 Level++; 856 Op = Op->Asl.Child; 857 continue; 858 } 859 } 860 else if (Status != AE_CTRL_DEPTH) 861 { 862 /* Exit immediately on any error */ 863 864 return (Status); 865 } 866 } 867 868 /* Terminate walk at start op */ 869 870 if (Op == StartOp) 871 { 872 break; 873 } 874 875 /* No more children, visit peers */ 876 877 if (Op->Asl.Next) 878 { 879 Op = Op->Asl.Next; 880 OpPreviouslyVisited = FALSE; 881 } 882 else 883 { 884 /* No children or peers, re-visit parent */ 885 886 if (Level != 0 ) 887 { 888 Level--; 889 } 890 Op = Op->Asl.Parent; 891 OpPreviouslyVisited = TRUE; 892 } 893 } 894 break; 895 896 case ASL_WALK_VISIT_UPWARD: 897 898 while (Op) 899 { 900 /* Visit leaf op (no children) or parent op on return trip */ 901 902 if ((!Op->Asl.Child) || 903 (OpPreviouslyVisited)) 904 { 905 /* Let the callback process the op. */ 906 907 Status = AscendingCallback (Op, Level, Context); 908 if (ACPI_FAILURE (Status)) 909 { 910 return (Status); 911 } 912 } 913 else 914 { 915 /* Visit children first, once */ 916 917 Level++; 918 Op = Op->Asl.Child; 919 continue; 920 } 921 922 /* Terminate walk at start op */ 923 924 if (Op == StartOp) 925 { 926 break; 927 } 928 929 /* No more children, visit peers */ 930 931 if (Op->Asl.Next) 932 { 933 Op = Op->Asl.Next; 934 OpPreviouslyVisited = FALSE; 935 } 936 else 937 { 938 /* No children or peers, re-visit parent */ 939 940 if (Level != 0 ) 941 { 942 Level--; 943 } 944 Op = Op->Asl.Parent; 945 OpPreviouslyVisited = TRUE; 946 } 947 } 948 break; 949 950 case ASL_WALK_VISIT_TWICE: 951 952 while (Op) 953 { 954 if (OpPreviouslyVisited) 955 { 956 Status = AscendingCallback (Op, Level, Context); 957 if (ACPI_FAILURE (Status)) 958 { 959 return (Status); 960 } 961 } 962 else 963 { 964 /* Let the callback process the op. */ 965 966 Status = DescendingCallback (Op, Level, Context); 967 if (ACPI_SUCCESS (Status)) 968 { 969 /* Visit children first, once */ 970 971 if (Op->Asl.Child) 972 { 973 Level++; 974 Op = Op->Asl.Child; 975 continue; 976 } 977 } 978 else if (Status != AE_CTRL_DEPTH) 979 { 980 /* Exit immediately on any error */ 981 982 return (Status); 983 } 984 } 985 986 /* Terminate walk at start op */ 987 988 if (Op == StartOp) 989 { 990 break; 991 } 992 993 /* No more children, visit peers */ 994 995 if (Op->Asl.Next) 996 { 997 Op = Op->Asl.Next; 998 OpPreviouslyVisited = FALSE; 999 } 1000 else 1001 { 1002 /* No children or peers, re-visit parent */ 1003 1004 if (Level != 0 ) 1005 { 1006 Level--; 1007 } 1008 Op = Op->Asl.Parent; 1009 OpPreviouslyVisited = TRUE; 1010 } 1011 } 1012 break; 1013 1014 default: 1015 /* No other types supported */ 1016 break; 1017 } 1018 1019 /* If we get here, the walk completed with no errors */ 1020 1021 return (AE_OK); 1022 } 1023