1 /*******************************************************************************
   2  *
   3  * Module Name: dmwalk - AML disassembly tree walk
   4  *
   5  ******************************************************************************/
   6 
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43 
  44 
  45 #include "acpi.h"
  46 #include "accommon.h"
  47 #include "acparser.h"
  48 #include "amlcode.h"
  49 #include "acdisasm.h"
  50 #include "acdebug.h"
  51 
  52 
  53 #ifdef ACPI_DISASSEMBLER
  54 
  55 #define _COMPONENT          ACPI_CA_DEBUGGER
  56         ACPI_MODULE_NAME    ("dmwalk")
  57 
  58 
  59 #define DB_FULL_OP_INFO     "[%4.4s] @%5.5X #%4.4X:  "
  60 
  61 /* Stub for non-compiler code */
  62 
  63 #ifndef ACPI_ASL_COMPILER
  64 void
  65 AcpiDmEmitExternals (
  66     void)
  67 {
  68     return;
  69 }
  70 #endif
  71 
  72 /* Local prototypes */
  73 
  74 static ACPI_STATUS
  75 AcpiDmDescendingOp (
  76     ACPI_PARSE_OBJECT       *Op,
  77     UINT32                  Level,
  78     void                    *Context);
  79 
  80 static ACPI_STATUS
  81 AcpiDmAscendingOp (
  82     ACPI_PARSE_OBJECT       *Op,
  83     UINT32                  Level,
  84     void                    *Context);
  85 
  86 static UINT32
  87 AcpiDmBlockType (
  88     ACPI_PARSE_OBJECT       *Op);
  89 
  90 
  91 /*******************************************************************************
  92  *
  93  * FUNCTION:    AcpiDmDisassemble
  94  *
  95  * PARAMETERS:  WalkState       - Current state
  96  *              Origin          - Starting object
  97  *              NumOpcodes      - Max number of opcodes to be displayed
  98  *
  99  * RETURN:      None
 100  *
 101  * DESCRIPTION: Disassemble parser object and its children. This is the
 102  *              main entry point of the disassembler.
 103  *
 104  ******************************************************************************/
 105 
 106 void
 107 AcpiDmDisassemble (
 108     ACPI_WALK_STATE         *WalkState,
 109     ACPI_PARSE_OBJECT       *Origin,
 110     UINT32                  NumOpcodes)
 111 {
 112     ACPI_PARSE_OBJECT       *Op = Origin;
 113     ACPI_OP_WALK_INFO       Info;
 114 
 115 
 116     if (!Op)
 117     {
 118         return;
 119     }
 120 
 121     Info.Flags = 0;
 122     Info.Level = 0;
 123     Info.Count = 0;
 124     Info.WalkState = WalkState;
 125     AcpiDmWalkParseTree (Op, AcpiDmDescendingOp, AcpiDmAscendingOp, &Info);
 126     return;
 127 }
 128 
 129 
 130 /*******************************************************************************
 131  *
 132  * FUNCTION:    AcpiDmWalkParseTree
 133  *
 134  * PARAMETERS:  Op                      - Root Op object
 135  *              DescendingCallback      - Called during tree descent
 136  *              AscendingCallback       - Called during tree ascent
 137  *              Context                 - To be passed to the callbacks
 138  *
 139  * RETURN:      Status from callback(s)
 140  *
 141  * DESCRIPTION: Walk the entire parse tree.
 142  *
 143  ******************************************************************************/
 144 
 145 void
 146 AcpiDmWalkParseTree (
 147     ACPI_PARSE_OBJECT       *Op,
 148     ASL_WALK_CALLBACK       DescendingCallback,
 149     ASL_WALK_CALLBACK       AscendingCallback,
 150     void                    *Context)
 151 {
 152     BOOLEAN                 NodePreviouslyVisited;
 153     ACPI_PARSE_OBJECT       *StartOp = Op;
 154     ACPI_STATUS             Status;
 155     ACPI_PARSE_OBJECT       *Next;
 156     ACPI_OP_WALK_INFO       *Info = Context;
 157 
 158 
 159     Info->Level = 0;
 160     NodePreviouslyVisited = FALSE;
 161 
 162     while (Op)
 163     {
 164         if (NodePreviouslyVisited)
 165         {
 166             if (AscendingCallback)
 167             {
 168                 Status = AscendingCallback (Op, Info->Level, Context);
 169                 if (ACPI_FAILURE (Status))
 170                 {
 171                     return;
 172                 }
 173             }
 174         }
 175         else
 176         {
 177             /* Let the callback process the node */
 178 
 179             Status = DescendingCallback (Op, Info->Level, Context);
 180             if (ACPI_SUCCESS (Status))
 181             {
 182                 /* Visit children first, once */
 183 
 184                 Next = AcpiPsGetArg (Op, 0);
 185                 if (Next)
 186                 {
 187                     Info->Level++;
 188                     Op = Next;
 189                     continue;
 190                 }
 191             }
 192             else if (Status != AE_CTRL_DEPTH)
 193             {
 194                 /* Exit immediately on any error */
 195 
 196                 return;
 197             }
 198         }
 199 
 200         /* Terminate walk at start op */
 201 
 202         if (Op == StartOp)
 203         {
 204             break;
 205         }
 206 
 207         /* No more children, re-visit this node */
 208 
 209         if (!NodePreviouslyVisited)
 210         {
 211             NodePreviouslyVisited = TRUE;
 212             continue;
 213         }
 214 
 215         /* No more children, visit peers */
 216 
 217         if (Op->Common.Next)
 218         {
 219             Op = Op->Common.Next;
 220             NodePreviouslyVisited = FALSE;
 221         }
 222         else
 223         {
 224             /* No peers, re-visit parent */
 225 
 226             if (Info->Level != 0 )
 227             {
 228                 Info->Level--;
 229             }
 230 
 231             Op = Op->Common.Parent;
 232             NodePreviouslyVisited = TRUE;
 233         }
 234     }
 235 
 236     /* If we get here, the walk completed with no errors */
 237 
 238     return;
 239 }
 240 
 241 
 242 /*******************************************************************************
 243  *
 244  * FUNCTION:    AcpiDmBlockType
 245  *
 246  * PARAMETERS:  Op              - Object to be examined
 247  *
 248  * RETURN:      BlockType - not a block, parens, braces, or even both.
 249  *
 250  * DESCRIPTION: Type of block for this op (parens or braces)
 251  *
 252  ******************************************************************************/
 253 
 254 static UINT32
 255 AcpiDmBlockType (
 256     ACPI_PARSE_OBJECT       *Op)
 257 {
 258     const ACPI_OPCODE_INFO  *OpInfo;
 259 
 260 
 261     if (!Op)
 262     {
 263         return (BLOCK_NONE);
 264     }
 265 
 266     switch (Op->Common.AmlOpcode)
 267     {
 268     case AML_ELSE_OP:
 269 
 270         return (BLOCK_BRACE);
 271 
 272     case AML_METHOD_OP:
 273     case AML_DEVICE_OP:
 274     case AML_SCOPE_OP:
 275     case AML_PROCESSOR_OP:
 276     case AML_POWER_RES_OP:
 277     case AML_THERMAL_ZONE_OP:
 278     case AML_IF_OP:
 279     case AML_WHILE_OP:
 280     case AML_FIELD_OP:
 281     case AML_INDEX_FIELD_OP:
 282     case AML_BANK_FIELD_OP:
 283 
 284         return (BLOCK_PAREN | BLOCK_BRACE);
 285 
 286     case AML_BUFFER_OP:
 287 
 288         if (Op->Common.DisasmOpcode == ACPI_DASM_UNICODE)
 289         {
 290             return (BLOCK_NONE);
 291         }
 292 
 293         /*lint -fallthrough */
 294 
 295     case AML_PACKAGE_OP:
 296     case AML_VAR_PACKAGE_OP:
 297 
 298         return (BLOCK_PAREN | BLOCK_BRACE);
 299 
 300     case AML_EVENT_OP:
 301 
 302         return (BLOCK_PAREN);
 303 
 304     default:
 305 
 306         OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 307         if (OpInfo->Flags & AML_HAS_ARGS)
 308         {
 309             return (BLOCK_PAREN);
 310         }
 311 
 312         return (BLOCK_NONE);
 313     }
 314 }
 315 
 316 
 317 /*******************************************************************************
 318  *
 319  * FUNCTION:    AcpiDmListType
 320  *
 321  * PARAMETERS:  Op              - Object to be examined
 322  *
 323  * RETURN:      ListType - has commas or not.
 324  *
 325  * DESCRIPTION: Type of block for this op (parens or braces)
 326  *
 327  ******************************************************************************/
 328 
 329 UINT32
 330 AcpiDmListType (
 331     ACPI_PARSE_OBJECT       *Op)
 332 {
 333     const ACPI_OPCODE_INFO  *OpInfo;
 334 
 335 
 336     if (!Op)
 337     {
 338         return (BLOCK_NONE);
 339     }
 340 
 341     switch (Op->Common.AmlOpcode)
 342     {
 343 
 344     case AML_ELSE_OP:
 345     case AML_METHOD_OP:
 346     case AML_DEVICE_OP:
 347     case AML_SCOPE_OP:
 348     case AML_POWER_RES_OP:
 349     case AML_PROCESSOR_OP:
 350     case AML_THERMAL_ZONE_OP:
 351     case AML_IF_OP:
 352     case AML_WHILE_OP:
 353     case AML_FIELD_OP:
 354     case AML_INDEX_FIELD_OP:
 355     case AML_BANK_FIELD_OP:
 356 
 357         return (BLOCK_NONE);
 358 
 359     case AML_BUFFER_OP:
 360     case AML_PACKAGE_OP:
 361     case AML_VAR_PACKAGE_OP:
 362 
 363         return (BLOCK_COMMA_LIST);
 364 
 365     default:
 366 
 367         OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 368         if (OpInfo->Flags & AML_HAS_ARGS)
 369         {
 370             return (BLOCK_COMMA_LIST);
 371         }
 372 
 373         return (BLOCK_NONE);
 374     }
 375 }
 376 
 377 
 378 /*******************************************************************************
 379  *
 380  * FUNCTION:    AcpiDmDescendingOp
 381  *
 382  * PARAMETERS:  ASL_WALK_CALLBACK
 383  *
 384  * RETURN:      Status
 385  *
 386  * DESCRIPTION: First visitation of a parse object during tree descent.
 387  *              Decode opcode name and begin parameter list(s), if any.
 388  *
 389  ******************************************************************************/
 390 
 391 static ACPI_STATUS
 392 AcpiDmDescendingOp (
 393     ACPI_PARSE_OBJECT       *Op,
 394     UINT32                  Level,
 395     void                    *Context)
 396 {
 397     ACPI_OP_WALK_INFO       *Info = Context;
 398     const ACPI_OPCODE_INFO  *OpInfo;
 399     UINT32                  Name;
 400     ACPI_PARSE_OBJECT       *NextOp;
 401 
 402 
 403     if (Op->Common.DisasmFlags & ACPI_PARSEOP_IGNORE)
 404     {
 405         /* Ignore this op -- it was handled elsewhere */
 406 
 407         return (AE_CTRL_DEPTH);
 408     }
 409 
 410     /* Level 0 is at the Definition Block level */
 411 
 412     if (Level == 0)
 413     {
 414         /* In verbose mode, print the AML offset, opcode and depth count */
 415 
 416         if (Info->WalkState)
 417         {
 418             VERBOSE_PRINT ((DB_FULL_OP_INFO,
 419                 (Info->WalkState->MethodNode ?
 420                     Info->WalkState->MethodNode->Name.Ascii : "   "),
 421                 Op->Common.AmlOffset, (UINT32) Op->Common.AmlOpcode));
 422         }
 423 
 424         if (Op->Common.AmlOpcode == AML_SCOPE_OP)
 425         {
 426             /* This is the beginning of the Definition Block */
 427 
 428             AcpiOsPrintf ("{\n");
 429 
 430             /* Emit all External() declarations here */
 431 
 432             AcpiDmEmitExternals ();
 433             return (AE_OK);
 434         }
 435     }
 436     else if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
 437              (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&
 438              (Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))
 439     {
 440             /*
 441              * This is a first-level element of a term list,
 442              * indent a new line
 443              */
 444             switch (Op->Common.AmlOpcode)
 445             {
 446             case AML_NOOP_OP:
 447                 /*
 448                  * Optionally just ignore this opcode. Some tables use
 449                  * NoOp opcodes for "padding" out packages that the BIOS
 450                  * changes dynamically. This can leave hundreds or
 451                  * thousands of NoOp opcodes that if disassembled,
 452                  * cannot be compiled because they are syntactically
 453                  * incorrect.
 454                  */
 455                 if (AcpiGbl_IgnoreNoopOperator)
 456                 {
 457                     Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
 458                     return (AE_OK);
 459                 }
 460 
 461                 /* Fallthrough */
 462 
 463             default:
 464 
 465                 AcpiDmIndent (Level);
 466                 break;
 467             }
 468 
 469             Info->LastLevel = Level;
 470             Info->Count = 0;
 471     }
 472 
 473     /*
 474      * This is an inexpensive mechanism to try and keep lines from getting
 475      * too long. When the limit is hit, start a new line at the previous
 476      * indent plus one. A better but more expensive mechanism would be to
 477      * keep track of the current column.
 478      */
 479     Info->Count++;
 480     if (Info->Count /* +Info->LastLevel */ > 10)
 481     {
 482         Info->Count = 0;
 483         AcpiOsPrintf ("\n");
 484         AcpiDmIndent (Info->LastLevel + 1);
 485     }
 486 
 487     /* Print the opcode name */
 488 
 489     AcpiDmDisassembleOneOp (NULL, Info, Op);
 490 
 491     if ((Op->Common.DisasmOpcode == ACPI_DASM_LNOT_PREFIX) ||
 492         (Op->Common.AmlOpcode == AML_INT_CONNECTION_OP))
 493     {
 494         return (AE_OK);
 495     }
 496 
 497     if ((Op->Common.AmlOpcode == AML_NAME_OP) ||
 498         (Op->Common.AmlOpcode == AML_RETURN_OP))
 499     {
 500         Info->Level--;
 501     }
 502 
 503     /* Start the opcode argument list if necessary */
 504 
 505     OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 506 
 507     if ((OpInfo->Flags & AML_HAS_ARGS) ||
 508         (Op->Common.AmlOpcode == AML_EVENT_OP))
 509     {
 510         /* This opcode has an argument list */
 511 
 512         if (AcpiDmBlockType (Op) & BLOCK_PAREN)
 513         {
 514             AcpiOsPrintf (" (");
 515         }
 516 
 517         /* If this is a named opcode, print the associated name value */
 518 
 519         if (OpInfo->Flags & AML_NAMED)
 520         {
 521             switch (Op->Common.AmlOpcode)
 522             {
 523             case AML_ALIAS_OP:
 524 
 525                 NextOp = AcpiPsGetDepthNext (NULL, Op);
 526                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
 527                 AcpiDmNamestring (NextOp->Common.Value.Name);
 528                 AcpiOsPrintf (", ");
 529 
 530                 /*lint -fallthrough */
 531 
 532             default:
 533 
 534                 Name = AcpiPsGetName (Op);
 535                 if (Op->Named.Path)
 536                 {
 537                     AcpiDmNamestring ((char *) Op->Named.Path);
 538                 }
 539                 else
 540                 {
 541                     AcpiDmDumpName (Name);
 542                 }
 543 
 544                 if (Op->Common.AmlOpcode != AML_INT_NAMEDFIELD_OP)
 545                 {
 546                     if (AcpiGbl_DbOpt_verbose)
 547                     {
 548                         (void) AcpiPsDisplayObjectPathname (NULL, Op);
 549                     }
 550                 }
 551                 break;
 552             }
 553 
 554             switch (Op->Common.AmlOpcode)
 555             {
 556             case AML_METHOD_OP:
 557 
 558                 AcpiDmMethodFlags (Op);
 559                 AcpiOsPrintf (")");
 560 
 561                 /* Emit description comment for Method() with a predefined ACPI name */
 562 
 563                 AcpiDmPredefinedDescription (Op);
 564                 break;
 565 
 566 
 567             case AML_NAME_OP:
 568 
 569                 /* Check for _HID and related EISAID() */
 570 
 571                 AcpiDmIsEisaId (Op);
 572                 AcpiOsPrintf (", ");
 573                 break;
 574 
 575 
 576             case AML_REGION_OP:
 577 
 578                 AcpiDmRegionFlags (Op);
 579                 break;
 580 
 581 
 582             case AML_POWER_RES_OP:
 583 
 584                 /* Mark the next two Ops as part of the parameter list */
 585 
 586                 AcpiOsPrintf (", ");
 587                 NextOp = AcpiPsGetDepthNext (NULL, Op);
 588                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 589 
 590                 NextOp = NextOp->Common.Next;
 591                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 592                 return (AE_OK);
 593 
 594 
 595             case AML_PROCESSOR_OP:
 596 
 597                 /* Mark the next three Ops as part of the parameter list */
 598 
 599                 AcpiOsPrintf (", ");
 600                 NextOp = AcpiPsGetDepthNext (NULL, Op);
 601                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 602 
 603                 NextOp = NextOp->Common.Next;
 604                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 605 
 606                 NextOp = NextOp->Common.Next;
 607                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 608                 return (AE_OK);
 609 
 610 
 611             case AML_MUTEX_OP:
 612             case AML_DATA_REGION_OP:
 613 
 614                 AcpiOsPrintf (", ");
 615                 return (AE_OK);
 616 
 617 
 618             case AML_EVENT_OP:
 619             case AML_ALIAS_OP:
 620 
 621                 return (AE_OK);
 622 
 623 
 624             case AML_SCOPE_OP:
 625             case AML_DEVICE_OP:
 626             case AML_THERMAL_ZONE_OP:
 627 
 628                 AcpiOsPrintf (")");
 629                 break;
 630 
 631 
 632             default:
 633 
 634                 AcpiOsPrintf ("*** Unhandled named opcode %X\n",
 635                     Op->Common.AmlOpcode);
 636                 break;
 637             }
 638         }
 639 
 640         else switch (Op->Common.AmlOpcode)
 641         {
 642         case AML_FIELD_OP:
 643         case AML_BANK_FIELD_OP:
 644         case AML_INDEX_FIELD_OP:
 645 
 646             Info->BitOffset = 0;
 647 
 648             /* Name of the parent OperationRegion */
 649 
 650             NextOp = AcpiPsGetDepthNext (NULL, Op);
 651             AcpiDmNamestring (NextOp->Common.Value.Name);
 652             AcpiOsPrintf (", ");
 653             NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
 654 
 655             switch (Op->Common.AmlOpcode)
 656             {
 657             case AML_BANK_FIELD_OP:
 658 
 659                 /* Namestring - Bank Name */
 660 
 661                 NextOp = AcpiPsGetDepthNext (NULL, NextOp);
 662                 AcpiDmNamestring (NextOp->Common.Value.Name);
 663                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
 664                 AcpiOsPrintf (", ");
 665 
 666                 /*
 667                  * Bank Value. This is a TermArg in the middle of the parameter
 668                  * list, must handle it here.
 669                  *
 670                  * Disassemble the TermArg parse tree. ACPI_PARSEOP_PARAMLIST
 671                  * eliminates newline in the output.
 672                  */
 673                 NextOp = NextOp->Common.Next;
 674 
 675                 Info->Flags = ACPI_PARSEOP_PARAMLIST;
 676                 AcpiDmWalkParseTree (NextOp, AcpiDmDescendingOp,
 677                     AcpiDmAscendingOp, Info);
 678                 Info->Flags = 0;
 679                 Info->Level = Level;
 680 
 681                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
 682                 AcpiOsPrintf (", ");
 683                 break;
 684 
 685             case AML_INDEX_FIELD_OP:
 686 
 687                 /* Namestring - Data Name */
 688 
 689                 NextOp = AcpiPsGetDepthNext (NULL, NextOp);
 690                 AcpiDmNamestring (NextOp->Common.Value.Name);
 691                 AcpiOsPrintf (", ");
 692                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
 693                 break;
 694 
 695             default:
 696 
 697                 break;
 698             }
 699 
 700             AcpiDmFieldFlags (NextOp);
 701             break;
 702 
 703         case AML_BUFFER_OP:
 704 
 705             /* The next op is the size parameter */
 706 
 707             NextOp = AcpiPsGetDepthNext (NULL, Op);
 708             if (!NextOp)
 709             {
 710                 /* Single-step support */
 711 
 712                 return (AE_OK);
 713             }
 714 
 715             if (Op->Common.DisasmOpcode == ACPI_DASM_RESOURCE)
 716             {
 717                 /*
 718                  * We have a resource list. Don't need to output
 719                  * the buffer size Op. Open up a new block
 720                  */
 721                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
 722                 NextOp = NextOp->Common.Next;
 723                 AcpiOsPrintf (")");
 724 
 725                 /* Emit description comment for Name() with a predefined ACPI name */
 726 
 727                 AcpiDmPredefinedDescription (Op->Asl.Parent);
 728 
 729                 AcpiOsPrintf ("\n");
 730                 AcpiDmIndent (Info->Level);
 731                 AcpiOsPrintf ("{\n");
 732                 return (AE_OK);
 733             }
 734 
 735             /* Normal Buffer, mark size as in the parameter list */
 736 
 737             NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 738             return (AE_OK);
 739 
 740         case AML_VAR_PACKAGE_OP:
 741         case AML_IF_OP:
 742         case AML_WHILE_OP:
 743 
 744             /* The next op is the size or predicate parameter */
 745 
 746             NextOp = AcpiPsGetDepthNext (NULL, Op);
 747             if (NextOp)
 748             {
 749                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 750             }
 751             return (AE_OK);
 752 
 753         case AML_PACKAGE_OP:
 754 
 755             /* The next op is the size parameter */
 756 
 757             NextOp = AcpiPsGetDepthNext (NULL, Op);
 758             if (NextOp)
 759             {
 760                 NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
 761             }
 762             return (AE_OK);
 763 
 764         case AML_MATCH_OP:
 765 
 766             AcpiDmMatchOp (Op);
 767             break;
 768 
 769         default:
 770 
 771             break;
 772         }
 773 
 774         if (AcpiDmBlockType (Op) & BLOCK_BRACE)
 775         {
 776             AcpiOsPrintf ("\n");
 777             AcpiDmIndent (Level);
 778             AcpiOsPrintf ("{\n");
 779         }
 780     }
 781 
 782     return (AE_OK);
 783 }
 784 
 785 
 786 /*******************************************************************************
 787  *
 788  * FUNCTION:    AcpiDmAscendingOp
 789  *
 790  * PARAMETERS:  ASL_WALK_CALLBACK
 791  *
 792  * RETURN:      Status
 793  *
 794  * DESCRIPTION: Second visitation of a parse object, during ascent of parse
 795  *              tree. Close out any parameter lists and complete the opcode.
 796  *
 797  ******************************************************************************/
 798 
 799 static ACPI_STATUS
 800 AcpiDmAscendingOp (
 801     ACPI_PARSE_OBJECT       *Op,
 802     UINT32                  Level,
 803     void                    *Context)
 804 {
 805     ACPI_OP_WALK_INFO       *Info = Context;
 806     ACPI_PARSE_OBJECT       *ParentOp;
 807 
 808 
 809     if (Op->Common.DisasmFlags & ACPI_PARSEOP_IGNORE)
 810     {
 811         /* Ignore this op -- it was handled elsewhere */
 812 
 813         return (AE_OK);
 814     }
 815 
 816     if ((Level == 0) && (Op->Common.AmlOpcode == AML_SCOPE_OP))
 817     {
 818         /* Indicates the end of the current descriptor block (table) */
 819 
 820         AcpiOsPrintf ("}\n\n");
 821         return (AE_OK);
 822     }
 823 
 824     switch (AcpiDmBlockType (Op))
 825     {
 826     case BLOCK_PAREN:
 827 
 828         /* Completed an op that has arguments, add closing paren */
 829 
 830         AcpiOsPrintf (")");
 831 
 832         if (Op->Common.AmlOpcode == AML_NAME_OP)
 833         {
 834             /* Emit description comment for Name() with a predefined ACPI name */
 835 
 836             AcpiDmPredefinedDescription (Op);
 837         }
 838         else
 839         {
 840             /* For Create* operators, attempt to emit resource tag description */
 841 
 842             AcpiDmFieldPredefinedDescription (Op);
 843         }
 844 
 845         /* Could be a nested operator, check if comma required */
 846 
 847         if (!AcpiDmCommaIfListMember (Op))
 848         {
 849             if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
 850                      (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&
 851                      (Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))
 852             {
 853                 /*
 854                  * This is a first-level element of a term list
 855                  * start a new line
 856                  */
 857                 if (!(Info->Flags & ACPI_PARSEOP_PARAMLIST))
 858                 {
 859                     AcpiOsPrintf ("\n");
 860                 }
 861             }
 862         }
 863         break;
 864 
 865     case BLOCK_BRACE:
 866     case (BLOCK_BRACE | BLOCK_PAREN):
 867 
 868         /* Completed an op that has a term list, add closing brace */
 869 
 870         if (Op->Common.DisasmFlags & ACPI_PARSEOP_EMPTY_TERMLIST)
 871         {
 872             AcpiOsPrintf ("}");
 873         }
 874         else
 875         {
 876             AcpiDmIndent (Level);
 877             AcpiOsPrintf ("}");
 878         }
 879 
 880         AcpiDmCommaIfListMember (Op);
 881 
 882         if (AcpiDmBlockType (Op->Common.Parent) != BLOCK_PAREN)
 883         {
 884             AcpiOsPrintf ("\n");
 885             if (!(Op->Common.DisasmFlags & ACPI_PARSEOP_EMPTY_TERMLIST))
 886             {
 887                 if ((Op->Common.AmlOpcode == AML_IF_OP)  &&
 888                     (Op->Common.Next) &&
 889                     (Op->Common.Next->Common.AmlOpcode == AML_ELSE_OP))
 890                 {
 891                     break;
 892                 }
 893 
 894                 if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
 895                     (!Op->Common.Next))
 896                 {
 897                     break;
 898                 }
 899                 AcpiOsPrintf ("\n");
 900             }
 901         }
 902         break;
 903 
 904     case BLOCK_NONE:
 905     default:
 906 
 907         /* Could be a nested operator, check if comma required */
 908 
 909         if (!AcpiDmCommaIfListMember (Op))
 910         {
 911             if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
 912                      (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&
 913                      (Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))
 914             {
 915                 /*
 916                  * This is a first-level element of a term list
 917                  * start a new line
 918                  */
 919                 AcpiOsPrintf ("\n");
 920             }
 921         }
 922         else if (Op->Common.Parent)
 923         {
 924             switch (Op->Common.Parent->Common.AmlOpcode)
 925             {
 926             case AML_PACKAGE_OP:
 927             case AML_VAR_PACKAGE_OP:
 928 
 929                 if (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST))
 930                 {
 931                     AcpiOsPrintf ("\n");
 932                 }
 933                 break;
 934 
 935             default:
 936 
 937                 break;
 938             }
 939         }
 940         break;
 941     }
 942 
 943     if (Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)
 944     {
 945         if ((Op->Common.Next) &&
 946             (Op->Common.Next->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST))
 947         {
 948             return (AE_OK);
 949         }
 950 
 951         /*
 952          * Just completed a parameter node for something like "Buffer (param)".
 953          * Close the paren and open up the term list block with a brace
 954          */
 955         if (Op->Common.Next)
 956         {
 957             AcpiOsPrintf (")");
 958 
 959             /* Emit description comment for Name() with a predefined ACPI name */
 960 
 961             ParentOp = Op->Common.Parent;
 962             if (ParentOp)
 963             {
 964                 ParentOp = ParentOp->Common.Parent;
 965                 if (ParentOp && ParentOp->Asl.AmlOpcode == AML_NAME_OP)
 966                 {
 967                     AcpiDmPredefinedDescription (ParentOp);
 968                 }
 969             }
 970             AcpiOsPrintf ("\n");
 971             AcpiDmIndent (Level - 1);
 972             AcpiOsPrintf ("{\n");
 973         }
 974         else
 975         {
 976             Op->Common.Parent->Common.DisasmFlags |=
 977                                     ACPI_PARSEOP_EMPTY_TERMLIST;
 978             AcpiOsPrintf (") {");
 979         }
 980     }
 981 
 982     if ((Op->Common.AmlOpcode == AML_NAME_OP) ||
 983         (Op->Common.AmlOpcode == AML_RETURN_OP))
 984     {
 985         Info->Level++;
 986     }
 987     return (AE_OK);
 988 }
 989 
 990 
 991 #endif  /* ACPI_DISASSEMBLER */