1 /******************************************************************************* 2 * 3 * Module Name: dmnames - AML disassembler, names, namestrings, pathnames 4 * 5 ******************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 #include "acpi.h" 45 #include "accommon.h" 46 #include "amlcode.h" 47 #include "acnamesp.h" 48 #include "acdisasm.h" 49 50 51 #define _COMPONENT ACPI_CA_DEBUGGER 52 ACPI_MODULE_NAME ("dmnames") 53 54 /* Local prototypes */ 55 56 #ifdef ACPI_OBSOLETE_FUNCTIONS 57 void 58 AcpiDmDisplayPath ( 59 ACPI_PARSE_OBJECT *Op); 60 #endif 61 62 63 /******************************************************************************* 64 * 65 * FUNCTION: AcpiDmDumpName 66 * 67 * PARAMETERS: Name - 4 character ACPI name 68 * 69 * RETURN: Final length of name 70 * 71 * DESCRIPTION: Dump an ACPI name, minus any trailing underscores. 72 * 73 ******************************************************************************/ 74 75 UINT32 76 AcpiDmDumpName ( 77 UINT32 Name) 78 { 79 UINT32 i; 80 UINT32 Length; 81 char NewName[4]; 82 83 84 /* Copy name locally in case the original name is not writeable */ 85 86 *ACPI_CAST_PTR (UINT32, &NewName[0]) = Name; 87 88 /* Ensure that the name is printable, even if we have to fix it */ 89 90 AcpiUtRepairName (NewName); 91 92 /* Remove all trailing underscores from the name */ 93 94 Length = ACPI_NAME_SIZE; 95 for (i = (ACPI_NAME_SIZE - 1); i != 0; i--) 96 { 97 if (NewName[i] == '_') 98 { 99 Length--; 100 } 101 else 102 { 103 break; 104 } 105 } 106 107 /* Dump the name, up to the start of the trailing underscores */ 108 109 for (i = 0; i < Length; i++) 110 { 111 AcpiOsPrintf ("%c", NewName[i]); 112 } 113 114 return (Length); 115 } 116 117 118 /******************************************************************************* 119 * 120 * FUNCTION: AcpiPsDisplayObjectPathname 121 * 122 * PARAMETERS: WalkState - Current walk state 123 * Op - Object whose pathname is to be obtained 124 * 125 * RETURN: Status 126 * 127 * DESCRIPTION: Diplay the pathname associated with a named object. Two 128 * versions. One searches the parse tree (for parser-only 129 * applications suchas AcpiDump), and the other searches the 130 * ACPI namespace (the parse tree is probably deleted) 131 * 132 ******************************************************************************/ 133 134 ACPI_STATUS 135 AcpiPsDisplayObjectPathname ( 136 ACPI_WALK_STATE *WalkState, 137 ACPI_PARSE_OBJECT *Op) 138 { 139 ACPI_STATUS Status; 140 ACPI_NAMESPACE_NODE *Node; 141 ACPI_BUFFER Buffer; 142 UINT32 DebugLevel; 143 144 145 /* Save current debug level so we don't get extraneous debug output */ 146 147 DebugLevel = AcpiDbgLevel; 148 AcpiDbgLevel = 0; 149 150 /* Just get the Node out of the Op object */ 151 152 Node = Op->Common.Node; 153 if (!Node) 154 { 155 /* Node not defined in this scope, look it up */ 156 157 Status = AcpiNsLookup (WalkState->ScopeInfo, Op->Common.Value.String, 158 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, 159 WalkState, &(Node)); 160 161 if (ACPI_FAILURE (Status)) 162 { 163 /* 164 * We can't get the pathname since the object is not in the 165 * namespace. This can happen during single stepping 166 * where a dynamic named object is *about* to be created. 167 */ 168 AcpiOsPrintf (" [Path not found]"); 169 goto Exit; 170 } 171 172 /* Save it for next time. */ 173 174 Op->Common.Node = Node; 175 } 176 177 /* Convert NamedDesc/handle to a full pathname */ 178 179 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 180 Status = AcpiNsHandleToPathname (Node, &Buffer, FALSE); 181 if (ACPI_FAILURE (Status)) 182 { 183 AcpiOsPrintf ("****Could not get pathname****)"); 184 goto Exit; 185 } 186 187 AcpiOsPrintf (" (Path %s)", (char *) Buffer.Pointer); 188 ACPI_FREE (Buffer.Pointer); 189 190 191 Exit: 192 /* Restore the debug level */ 193 194 AcpiDbgLevel = DebugLevel; 195 return (Status); 196 } 197 198 199 /******************************************************************************* 200 * 201 * FUNCTION: AcpiDmNamestring 202 * 203 * PARAMETERS: Name - ACPI Name string to store 204 * 205 * RETURN: None 206 * 207 * DESCRIPTION: Decode and dump an ACPI namestring. Handles prefix characters 208 * 209 ******************************************************************************/ 210 211 void 212 AcpiDmNamestring ( 213 char *Name) 214 { 215 UINT32 SegCount; 216 217 218 if (!Name) 219 { 220 return; 221 } 222 223 /* Handle all Scope Prefix operators */ 224 225 while (ACPI_IS_ROOT_PREFIX (ACPI_GET8 (Name)) || 226 ACPI_IS_PARENT_PREFIX (ACPI_GET8 (Name))) 227 { 228 /* Append prefix character */ 229 230 AcpiOsPrintf ("%1c", ACPI_GET8 (Name)); 231 Name++; 232 } 233 234 switch (ACPI_GET8 (Name)) 235 { 236 case 0: 237 238 SegCount = 0; 239 break; 240 241 case AML_DUAL_NAME_PREFIX: 242 243 SegCount = 2; 244 Name++; 245 break; 246 247 case AML_MULTI_NAME_PREFIX_OP: 248 249 SegCount = (UINT32) ACPI_GET8 (Name + 1); 250 Name += 2; 251 break; 252 253 default: 254 255 SegCount = 1; 256 break; 257 } 258 259 while (SegCount) 260 { 261 /* Append Name segment */ 262 263 AcpiDmDumpName (*ACPI_CAST_PTR (UINT32, Name)); 264 265 SegCount--; 266 if (SegCount) 267 { 268 /* Not last name, append dot separator */ 269 270 AcpiOsPrintf ("."); 271 } 272 273 Name += ACPI_NAME_SIZE; 274 } 275 } 276 277 278 #ifdef ACPI_OBSOLETE_FUNCTIONS 279 /******************************************************************************* 280 * 281 * FUNCTION: AcpiDmDisplayPath 282 * 283 * PARAMETERS: Op - Named Op whose path is to be constructed 284 * 285 * RETURN: None 286 * 287 * DESCRIPTION: Walk backwards from current scope and display the name 288 * of each previous level of scope up to the root scope 289 * (like "pwd" does with file systems) 290 * 291 ******************************************************************************/ 292 293 void 294 AcpiDmDisplayPath ( 295 ACPI_PARSE_OBJECT *Op) 296 { 297 ACPI_PARSE_OBJECT *Prev; 298 ACPI_PARSE_OBJECT *Search; 299 UINT32 Name; 300 BOOLEAN DoDot = FALSE; 301 ACPI_PARSE_OBJECT *NamePath; 302 const ACPI_OPCODE_INFO *OpInfo; 303 304 305 /* We are only interested in named objects */ 306 307 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 308 if (!(OpInfo->Flags & AML_NSNODE)) 309 { 310 return; 311 } 312 313 if (OpInfo->Flags & AML_CREATE) 314 { 315 /* Field creation - check for a fully qualified namepath */ 316 317 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) 318 { 319 NamePath = AcpiPsGetArg (Op, 3); 320 } 321 else 322 { 323 NamePath = AcpiPsGetArg (Op, 2); 324 } 325 326 if ((NamePath) && 327 (NamePath->Common.Value.String) && 328 (ACPI_IS_ROOT_PREFIX (NamePath->Common.Value.String[0]))) 329 { 330 AcpiDmNamestring (NamePath->Common.Value.String); 331 return; 332 } 333 } 334 335 Prev = NULL; /* Start with Root Node */ 336 while (Prev != Op) 337 { 338 /* Search upwards in the tree to find scope with "prev" as its parent */ 339 340 Search = Op; 341 for (; ;) 342 { 343 if (Search->Common.Parent == Prev) 344 { 345 break; 346 } 347 348 /* Go up one level */ 349 350 Search = Search->Common.Parent; 351 } 352 353 if (Prev) 354 { 355 OpInfo = AcpiPsGetOpcodeInfo (Search->Common.AmlOpcode); 356 if (!(OpInfo->Flags & AML_FIELD)) 357 { 358 /* Below root scope, append scope name */ 359 360 if (DoDot) 361 { 362 /* Append dot */ 363 364 AcpiOsPrintf ("."); 365 } 366 367 if (OpInfo->Flags & AML_CREATE) 368 { 369 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) 370 { 371 NamePath = AcpiPsGetArg (Op, 3); 372 } 373 else 374 { 375 NamePath = AcpiPsGetArg (Op, 2); 376 } 377 378 if ((NamePath) && 379 (NamePath->Common.Value.String)) 380 { 381 AcpiDmDumpName (NamePath->Common.Value.String); 382 } 383 } 384 else 385 { 386 Name = AcpiPsGetName (Search); 387 AcpiDmDumpName ((char *) &Name); 388 } 389 390 DoDot = TRUE; 391 } 392 } 393 394 Prev = Search; 395 } 396 } 397 398 399 /******************************************************************************* 400 * 401 * FUNCTION: AcpiDmValidateName 402 * 403 * PARAMETERS: Name - 4 character ACPI name 404 * 405 * RETURN: None 406 * 407 * DESCRIPTION: Lookup the name 408 * 409 ******************************************************************************/ 410 411 void 412 AcpiDmValidateName ( 413 char *Name, 414 ACPI_PARSE_OBJECT *Op) 415 { 416 ACPI_PARSE_OBJECT *TargetOp; 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 if ((!Name) || 432 (!Op->Common.Parent)) 433 { 434 return; 435 } 436 437 TargetOp = AcpiPsFind (Op, Name, 0, 0); 438 if (!TargetOp) 439 { 440 /* 441 * Didn't find the name in the parse tree. This may be 442 * a problem, or it may simply be one of the predefined names 443 * (such as _OS_). Rather than worry about looking up all 444 * the predefined names, just display the name as given 445 */ 446 AcpiOsPrintf ( 447 " /**** Name not found or not accessible from this scope ****/ "); 448 } 449 } 450 #endif 451