arch/all-pc/acpica/source/components/disassembler/dmnames.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: dmnames - AML disassembler, names, namestrings, pathnames
   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 "amlcode.h"
  48 #include "acnamesp.h"
  49 #include "acdisasm.h"
  50
  51
  52 #ifdef ACPI_DISASSEMBLER
  53
  54 #define _COMPONENT          ACPI_CA_DEBUGGER
  55         ACPI_MODULE_NAME    ("dmnames")
  56
  57 /* Local prototypes */
  58
  59 #ifdef ACPI_OBSOLETE_FUNCTIONS
  60 void
  61 AcpiDmDisplayPath (
  62     ACPI_PARSE_OBJECT       *Op);
  63 #endif
  64
  65
  66 /*******************************************************************************
  67  *
  68  * FUNCTION:    AcpiDmDumpName
  69  *
  70  * PARAMETERS:  Name            - 4 character ACPI name
  71  *
  72  * RETURN:      Final length of name
  73  *
  74  * DESCRIPTION: Dump an ACPI name, minus any trailing underscores.
  75  *
  76  ******************************************************************************/
  77
  78 UINT32
  79 AcpiDmDumpName (
  80     UINT32                  Name)
  81 {
  82     UINT32                  i;
  83     UINT32                  Length;
  84     char                    NewName[4];
  85
  86
  87     /* Copy name locally in case the original name is not writeable */
  88
  89     *ACPI_CAST_PTR (UINT32, &NewName[0]) = Name;
  90
  91     /* Ensure that the name is printable, even if we have to fix it */
  92
  93     AcpiUtRepairName (NewName);
  94
  95     /* Remove all trailing underscores from the name */
  96
  97     Length = ACPI_NAME_SIZE;
  98     for (i = (ACPI_NAME_SIZE - 1); i != 0; i--)
  99     {
 100         if (NewName[i] == '_')
 101         {
 102             Length--;
 103         }
 104         else
 105         {
 106             break;
 107         }
 108     }
 109
 110     /* Dump the name, up to the start of the trailing underscores */
 111
 112     for (i = 0; i < Length; i++)
 113     {
 114         AcpiOsPrintf ("%c", NewName[i]);
 115     }
 116
 117     return (Length);
 118 }
 119
 120
 121 /*******************************************************************************
 122  *
 123  * FUNCTION:    AcpiPsDisplayObjectPathname
 124  *
 125  * PARAMETERS:  WalkState       - Current walk state
 126  *              Op              - Object whose pathname is to be obtained
 127  *
 128  * RETURN:      Status
 129  *
 130  * DESCRIPTION: Diplay the pathname associated with a named object. Two
 131  *              versions. One searches the parse tree (for parser-only
 132  *              applications suchas AcpiDump), and the other searches the
 133  *              ACPI namespace (the parse tree is probably deleted)
 134  *
 135  ******************************************************************************/
 136
 137 ACPI_STATUS
 138 AcpiPsDisplayObjectPathname (
 139     ACPI_WALK_STATE         *WalkState,
 140     ACPI_PARSE_OBJECT       *Op)
 141 {
 142     ACPI_STATUS             Status;
 143     ACPI_NAMESPACE_NODE     *Node;
 144     ACPI_BUFFER             Buffer;
 145     UINT32                  DebugLevel;
 146
 147
 148     /* Save current debug level so we don't get extraneous debug output */
 149
 150     DebugLevel = AcpiDbgLevel;
 151     AcpiDbgLevel = 0;
 152
 153     /* Just get the Node out of the Op object */
 154
 155     Node = Op->Common.Node;
 156     if (!Node)
 157     {
 158         /* Node not defined in this scope, look it up */
 159
 160         Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Common.Value.String,
 161                     ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 162                     WalkState, &(Node));
 163
 164         if (ACPI_FAILURE (Status))
 165         {
 166             /*
 167              * We can't get the pathname since the object
 168              * is not in the namespace. This can happen during single
 169              * stepping where a dynamic named object is *about* to be created.
 170              */
 171             AcpiOsPrintf ("  [Path not found]");
 172             goto Exit;
 173         }
 174
 175         /* Save it for next time. */
 176
 177         Op->Common.Node = Node;
 178     }
 179
 180     /* Convert NamedDesc/handle to a full pathname */
 181
 182     Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
 183     Status = AcpiNsHandleToPathname (Node, &Buffer);
 184     if (ACPI_FAILURE (Status))
 185     {
 186         AcpiOsPrintf ("****Could not get pathname****)");
 187         goto Exit;
 188     }
 189
 190     AcpiOsPrintf ("  (Path %s)", (char *) Buffer.Pointer);
 191     ACPI_FREE (Buffer.Pointer);
 192
 193
 194 Exit:
 195     /* Restore the debug level */
 196
 197     AcpiDbgLevel = DebugLevel;
 198     return (Status);
 199 }
 200
 201
 202 /*******************************************************************************
 203  *
 204  * FUNCTION:    AcpiDmNamestring
 205  *
 206  * PARAMETERS:  Name                - ACPI Name string to store
 207  *
 208  * RETURN:      None
 209  *
 210  * DESCRIPTION: Decode and dump an ACPI namestring. Handles prefix characters
 211  *
 212  ******************************************************************************/
 213
 214 void
 215 AcpiDmNamestring (
 216     char                    *Name)
 217 {
 218     UINT32                  SegCount;
 219
 220
 221     if (!Name)
 222     {
 223         return;
 224     }
 225
 226     /* Handle all Scope Prefix operators */
 227
 228     while (ACPI_IS_ROOT_PREFIX (ACPI_GET8 (Name)) ||
 229            ACPI_IS_PARENT_PREFIX (ACPI_GET8 (Name)))
 230     {
 231         /* Append prefix character */
 232
 233         AcpiOsPrintf ("%1c", ACPI_GET8 (Name));
 234         Name++;
 235     }
 236
 237     switch (ACPI_GET8 (Name))
 238     {
 239     case 0:
 240
 241         SegCount = 0;
 242         break;
 243
 244     case AML_DUAL_NAME_PREFIX:
 245
 246         SegCount = 2;
 247         Name++;
 248         break;
 249
 250     case AML_MULTI_NAME_PREFIX_OP:
 251
 252         SegCount = (UINT32) ACPI_GET8 (Name + 1);
 253         Name += 2;
 254         break;
 255
 256     default:
 257
 258         SegCount = 1;
 259         break;
 260     }
 261
 262     while (SegCount)
 263     {
 264         /* Append Name segment */
 265
 266         AcpiDmDumpName (*ACPI_CAST_PTR (UINT32, Name));
 267
 268         SegCount--;
 269         if (SegCount)
 270         {
 271             /* Not last name, append dot separator */
 272
 273             AcpiOsPrintf (".");
 274         }
 275         Name += ACPI_NAME_SIZE;
 276     }
 277 }
 278
 279
 280 #ifdef ACPI_OBSOLETE_FUNCTIONS
 281 /*******************************************************************************
 282  *
 283  * FUNCTION:    AcpiDmDisplayPath
 284  *
 285  * PARAMETERS:  Op                  - Named Op whose path is to be constructed
 286  *
 287  * RETURN:      None
 288  *
 289  * DESCRIPTION: Walk backwards from current scope and display the name
 290  *              of each previous level of scope up to the root scope
 291  *              (like "pwd" does with file systems)
 292  *
 293  ******************************************************************************/
 294
 295 void
 296 AcpiDmDisplayPath (
 297     ACPI_PARSE_OBJECT       *Op)
 298 {
 299     ACPI_PARSE_OBJECT       *Prev;
 300     ACPI_PARSE_OBJECT       *Search;
 301     UINT32                  Name;
 302     BOOLEAN                 DoDot = FALSE;
 303     ACPI_PARSE_OBJECT       *NamePath;
 304     const ACPI_OPCODE_INFO  *OpInfo;
 305
 306
 307     /* We are only interested in named objects */
 308
 309     OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 310     if (!(OpInfo->Flags & AML_NSNODE))
 311     {
 312         return;
 313     }
 314
 315     if (OpInfo->Flags & AML_CREATE)
 316     {
 317         /* Field creation - check for a fully qualified namepath */
 318
 319         if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
 320         {
 321             NamePath = AcpiPsGetArg (Op, 3);
 322         }
 323         else
 324         {
 325             NamePath = AcpiPsGetArg (Op, 2);
 326         }
 327
 328         if ((NamePath) &&
 329             (NamePath->Common.Value.String) &&
 330             (ACPI_IS_ROOT_PREFIX (NamePath->Common.Value.String[0])))
 331         {
 332             AcpiDmNamestring (NamePath->Common.Value.String);
 333             return;
 334         }
 335     }
 336
 337     Prev = NULL;            /* Start with Root Node */
 338
 339     while (Prev != Op)
 340     {
 341         /* Search upwards in the tree to find scope with "prev" as its parent */
 342
 343         Search = Op;
 344         for (; ;)
 345         {
 346             if (Search->Common.Parent == Prev)
 347             {
 348                 break;
 349             }
 350
 351             /* Go up one level */
 352
 353             Search = Search->Common.Parent;
 354         }
 355
 356         if (Prev)
 357         {
 358             OpInfo = AcpiPsGetOpcodeInfo (Search->Common.AmlOpcode);
 359             if (!(OpInfo->Flags & AML_FIELD))
 360             {
 361                 /* Below root scope, append scope name */
 362
 363                 if (DoDot)
 364                 {
 365                     /* Append dot */
 366
 367                     AcpiOsPrintf (".");
 368                 }
 369
 370                 if (OpInfo->Flags & AML_CREATE)
 371                 {
 372                     if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
 373                     {
 374                         NamePath = AcpiPsGetArg (Op, 3);
 375                     }
 376                     else
 377                     {
 378                         NamePath = AcpiPsGetArg (Op, 2);
 379                     }
 380
 381                     if ((NamePath) &&
 382                         (NamePath->Common.Value.String))
 383                     {
 384                         AcpiDmDumpName (NamePath->Common.Value.String);
 385                     }
 386                 }
 387                 else
 388                 {
 389                     Name = AcpiPsGetName (Search);
 390                     AcpiDmDumpName ((char *) &Name);
 391                 }
 392
 393                 DoDot = TRUE;
 394             }
 395         }
 396         Prev = Search;
 397     }
 398 }
 399
 400
 401 /*******************************************************************************
 402  *
 403  * FUNCTION:    AcpiDmValidateName
 404  *
 405  * PARAMETERS:  Name            - 4 character ACPI name
 406  *
 407  * RETURN:      None
 408  *
 409  * DESCRIPTION: Lookup the name
 410  *
 411  ******************************************************************************/
 412
 413 void
 414 AcpiDmValidateName (
 415     char                    *Name,
 416     ACPI_PARSE_OBJECT       *Op)
 417 {
 418
 419     if ((!Name) ||
 420         (!Op->Common.Parent))
 421     {
 422         return;
 423     }
 424
 425     if (!Op->Common.Node)
 426     {
 427         AcpiOsPrintf (
 428             " /**** Name not found or not accessible from this scope ****/ ");
 429     }
 430
 431     ACPI_PARSE_OBJECT       *TargetOp;
 432
 433
 434     if ((!Name) ||
 435         (!Op->Common.Parent))
 436     {
 437         return;
 438     }
 439
 440     TargetOp = AcpiPsFind (Op, Name, 0, 0);
 441     if (!TargetOp)
 442     {
 443         /*
 444          * Didn't find the name in the parse tree. This may be
 445          * a problem, or it may simply be one of the predefined names
 446          * (such as _OS_). Rather than worry about looking up all
 447          * the predefined names, just display the name as given
 448          */
 449         AcpiOsPrintf (
 450             " /**** Name not found or not accessible from this scope ****/ ");
 451     }
 452 }
 453 #endif
 454
 455 #endif