|
||||
Warning, cross-references for /kernel/drivers/acpica/exnames.c need to be fixed.
0001 0002 /****************************************************************************** 0003 * 0004 * Module Name: exnames - interpreter/scanner name load/execute 0005 * 0006 *****************************************************************************/ 0007 0008 /****************************************************************************** 0009 * 0010 * 1. Copyright Notice 0011 * 0012 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 0013 * All rights reserved. 0014 * 0015 * 2. License 0016 * 0017 * 2.1. This is your license from Intel Corp. under its intellectual property 0018 * rights. You may have additional license terms from the party that provided 0019 * you this software, covering your right to use that party's intellectual 0020 * property rights. 0021 * 0022 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 0023 * copy of the source code appearing in this file ("Covered Code") an 0024 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 0025 * base code distributed originally by Intel ("Original Intel Code") to copy, 0026 * make derivatives, distribute, use and display any portion of the Covered 0027 * Code in any form, with the right to sublicense such rights; and 0028 * 0029 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 0030 * license (with the right to sublicense), under only those claims of Intel 0031 * patents that are infringed by the Original Intel Code, to make, use, sell, 0032 * offer to sell, and import the Covered Code and derivative works thereof 0033 * solely to the minimum extent necessary to exercise the above copyright 0034 * license, and in no event shall the patent license extend to any additions 0035 * to or modifications of the Original Intel Code. No other license or right 0036 * is granted directly or by implication, estoppel or otherwise; 0037 * 0038 * The above copyright and patent license is granted only if the following 0039 * conditions are met: 0040 * 0041 * 3. Conditions 0042 * 0043 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 0044 * Redistribution of source code of any substantial portion of the Covered 0045 * Code or modification with rights to further distribute source must include 0046 * the above Copyright Notice, the above License, this list of Conditions, 0047 * and the following Disclaimer and Export Compliance provision. In addition, 0048 * Licensee must cause all Covered Code to which Licensee contributes to 0049 * contain a file documenting the changes Licensee made to create that Covered 0050 * Code and the date of any change. Licensee must include in that file the 0051 * documentation of any changes made by any predecessor Licensee. Licensee 0052 * must include a prominent statement that the modification is derived, 0053 * directly or indirectly, from Original Intel Code. 0054 * 0055 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 0056 * Redistribution of source code of any substantial portion of the Covered 0057 * Code or modification without rights to further distribute source must 0058 * include the following Disclaimer and Export Compliance provision in the 0059 * documentation and/or other materials provided with distribution. In 0060 * addition, Licensee may not authorize further sublicense of source of any 0061 * portion of the Covered Code, and must include terms to the effect that the 0062 * license from Licensee to its licensee is limited to the intellectual 0063 * property embodied in the software Licensee provides to its licensee, and 0064 * not to intellectual property embodied in modifications its licensee may 0065 * make. 0066 * 0067 * 3.3. Redistribution of Executable. Redistribution in executable form of any 0068 * substantial portion of the Covered Code or modification must reproduce the 0069 * above Copyright Notice, and the following Disclaimer and Export Compliance 0070 * provision in the documentation and/or other materials provided with the 0071 * distribution. 0072 * 0073 * 3.4. Intel retains all right, title, and interest in and to the Original 0074 * Intel Code. 0075 * 0076 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 0077 * Intel shall be used in advertising or otherwise to promote the sale, use or 0078 * other dealings in products derived from or relating to the Covered Code 0079 * without prior written authorization from Intel. 0080 * 0081 * 4. Disclaimer and Export Compliance 0082 * 0083 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 0084 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 0085 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 0086 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 0087 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 0088 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 0089 * PARTICULAR PURPOSE. 0090 * 0091 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 0092 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 0093 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 0094 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 0095 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 0096 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 0097 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 0098 * LIMITED REMEDY. 0099 * 0100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 0101 * software or system incorporating such software without first obtaining any 0102 * required license or other approval from the U. S. Department of Commerce or 0103 * any other agency or department of the United States Government. In the 0104 * event Licensee exports any such software from the United States or 0105 * re-exports any such software from a foreign destination, Licensee shall 0106 * ensure that the distribution and export/re-export of the software is in 0107 * compliance with all laws, regulations, orders, or other restrictions of the 0108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 0109 * any of its subsidiaries will export/re-export any technical data, process, 0110 * software, or service, directly or indirectly, to any country for which the 0111 * United States government or any agency thereof requires an export license, 0112 * other governmental approval, or letter of assurance, without first obtaining 0113 * such license, approval or letter. 0114 * 0115 *****************************************************************************/ 0116 0117 #define __EXNAMES_C__ 0118 0119 #include "acpi.h" 0120 #include "accommon.h" 0121 #include "acinterp.h" 0122 #include "amlcode.h" 0123 0124 #define _COMPONENT ACPI_EXECUTER 0125 ACPI_MODULE_NAME ("exnames") 0126 0127 /* Local prototypes */ 0128 0129 static char * 0130 AcpiExAllocateNameString ( 0131 UINT32 PrefixCount, 0132 UINT32 NumNameSegs); 0133 0134 static ACPI_STATUS 0135 AcpiExNameSegment ( 0136 UINT8 **InAmlAddress, 0137 char *NameString); 0138 0139 0140 /******************************************************************************* 0141 * 0142 * FUNCTION: AcpiExAllocateNameString 0143 * 0144 * PARAMETERS: PrefixCount - Count of parent levels. Special cases: 0145 * (-1)==root, 0==none 0146 * NumNameSegs - count of 4-character name segments 0147 * 0148 * RETURN: A pointer to the allocated string segment. This segment must 0149 * be deleted by the caller. 0150 * 0151 * DESCRIPTION: Allocate a buffer for a name string. Ensure allocated name 0152 * string is long enough, and set up prefix if any. 0153 * 0154 ******************************************************************************/ 0155 0156 static char * 0157 AcpiExAllocateNameString ( 0158 UINT32 PrefixCount, 0159 UINT32 NumNameSegs) 0160 { 0161 char *TempPtr; 0162 char *NameString; 0163 UINT32 SizeNeeded; 0164 0165 ACPI_FUNCTION_TRACE (ExAllocateNameString); 0166 0167 0168 /* 0169 * Allow room for all \ and ^ prefixes, all segments and a MultiNamePrefix. 0170 * Also, one byte for the null terminator. 0171 * This may actually be somewhat longer than needed. 0172 */ 0173 if (PrefixCount == ACPI_UINT32_MAX) 0174 { 0175 /* Special case for root */ 0176 0177 SizeNeeded = 1 + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1; 0178 } 0179 else 0180 { 0181 SizeNeeded = PrefixCount + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1; 0182 } 0183 0184 /* 0185 * Allocate a buffer for the name. 0186 * This buffer must be deleted by the caller! 0187 */ 0188 NameString = ACPI_ALLOCATE (SizeNeeded); 0189 if (!NameString) 0190 { 0191 ACPI_ERROR ((AE_INFO, 0192 "Could not allocate size %d", SizeNeeded)); 0193 return_PTR (NULL); 0194 } 0195 0196 TempPtr = NameString; 0197 0198 /* Set up Root or Parent prefixes if needed */ 0199 0200 if (PrefixCount == ACPI_UINT32_MAX) 0201 { 0202 *TempPtr++ = AML_ROOT_PREFIX; 0203 } 0204 else 0205 { 0206 while (PrefixCount--) 0207 { 0208 *TempPtr++ = AML_PARENT_PREFIX; 0209 } 0210 } 0211 0212 0213 /* Set up Dual or Multi prefixes if needed */ 0214 0215 if (NumNameSegs > 2) 0216 { 0217 /* Set up multi prefixes */ 0218 0219 *TempPtr++ = AML_MULTI_NAME_PREFIX_OP; 0220 *TempPtr++ = (char) NumNameSegs; 0221 } 0222 else if (2 == NumNameSegs) 0223 { 0224 /* Set up dual prefixes */ 0225 0226 *TempPtr++ = AML_DUAL_NAME_PREFIX; 0227 } 0228 0229 /* 0230 * Terminate string following prefixes. AcpiExNameSegment() will 0231 * append the segment(s) 0232 */ 0233 *TempPtr = 0; 0234 0235 return_PTR (NameString); 0236 } 0237 0238 /******************************************************************************* 0239 * 0240 * FUNCTION: AcpiExNameSegment 0241 * 0242 * PARAMETERS: InAmlAddress - Pointer to the name in the AML code 0243 * NameString - Where to return the name. The name is appended 0244 * to any existing string to form a namepath 0245 * 0246 * RETURN: Status 0247 * 0248 * DESCRIPTION: Extract an ACPI name (4 bytes) from the AML byte stream 0249 * 0250 ******************************************************************************/ 0251 0252 static ACPI_STATUS 0253 AcpiExNameSegment ( 0254 UINT8 **InAmlAddress, 0255 char *NameString) 0256 { 0257 char *AmlAddress = (void *) *InAmlAddress; 0258 ACPI_STATUS Status = AE_OK; 0259 UINT32 Index; 0260 char CharBuf[5]; 0261 0262 0263 ACPI_FUNCTION_TRACE (ExNameSegment); 0264 0265 0266 /* 0267 * If first character is a digit, then we know that we aren't looking at a 0268 * valid name segment 0269 */ 0270 CharBuf[0] = *AmlAddress; 0271 0272 if ('0' <= CharBuf[0] && CharBuf[0] <= '9') 0273 { 0274 ACPI_ERROR ((AE_INFO, "Invalid leading digit: %c", CharBuf[0])); 0275 return_ACPI_STATUS (AE_CTRL_PENDING); 0276 } 0277 0278 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Bytes from stream:\n")); 0279 0280 for (Index = 0; 0281 (Index < ACPI_NAME_SIZE) && (AcpiUtValidAcpiChar (*AmlAddress, 0)); 0282 Index++) 0283 { 0284 CharBuf[Index] = *AmlAddress++; 0285 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "%c\n", CharBuf[Index])); 0286 } 0287 0288 0289 /* Valid name segment */ 0290 0291 if (Index == 4) 0292 { 0293 /* Found 4 valid characters */ 0294 0295 CharBuf[4] = '\0'; 0296 0297 if (NameString) 0298 { 0299 ACPI_STRCAT (NameString, CharBuf); 0300 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 0301 "Appended to - %s\n", NameString)); 0302 } 0303 else 0304 { 0305 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 0306 "No Name string - %s\n", CharBuf)); 0307 } 0308 } 0309 else if (Index == 0) 0310 { 0311 /* 0312 * First character was not a valid name character, 0313 * so we are looking at something other than a name. 0314 */ 0315 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 0316 "Leading character is not alpha: %02Xh (not a name)\n", 0317 CharBuf[0])); 0318 Status = AE_CTRL_PENDING; 0319 } 0320 else 0321 { 0322 /* 0323 * Segment started with one or more valid characters, but fewer than 0324 * the required 4 0325 */ 0326 Status = AE_AML_BAD_NAME; 0327 ACPI_ERROR ((AE_INFO, 0328 "Bad character %02x in name, at %p", 0329 *AmlAddress, AmlAddress)); 0330 } 0331 0332 *InAmlAddress = ACPI_CAST_PTR (UINT8, AmlAddress); 0333 return_ACPI_STATUS (Status); 0334 } 0335 0336 0337 /******************************************************************************* 0338 * 0339 * FUNCTION: AcpiExGetNameString 0340 * 0341 * PARAMETERS: DataType - Object type to be associated with this 0342 * name 0343 * InAmlAddress - Pointer to the namestring in the AML code 0344 * OutNameString - Where the namestring is returned 0345 * OutNameLength - Length of the returned string 0346 * 0347 * RETURN: Status, namestring and length 0348 * 0349 * DESCRIPTION: Extract a full namepath from the AML byte stream, 0350 * including any prefixes. 0351 * 0352 ******************************************************************************/ 0353 0354 ACPI_STATUS 0355 AcpiExGetNameString ( 0356 ACPI_OBJECT_TYPE DataType, 0357 UINT8 *InAmlAddress, 0358 char **OutNameString, 0359 UINT32 *OutNameLength) 0360 { 0361 ACPI_STATUS Status = AE_OK; 0362 UINT8 *AmlAddress = InAmlAddress; 0363 char *NameString = NULL; 0364 UINT32 NumSegments; 0365 UINT32 PrefixCount = 0; 0366 BOOLEAN HasPrefix = FALSE; 0367 0368 0369 ACPI_FUNCTION_TRACE_PTR (ExGetNameString, AmlAddress); 0370 0371 0372 if (ACPI_TYPE_LOCAL_REGION_FIELD == DataType || 0373 ACPI_TYPE_LOCAL_BANK_FIELD == DataType || 0374 ACPI_TYPE_LOCAL_INDEX_FIELD == DataType) 0375 { 0376 /* Disallow prefixes for types associated with FieldUnit names */ 0377 0378 NameString = AcpiExAllocateNameString (0, 1); 0379 if (!NameString) 0380 { 0381 Status = AE_NO_MEMORY; 0382 } 0383 else 0384 { 0385 Status = AcpiExNameSegment (&AmlAddress, NameString); 0386 } 0387 } 0388 else 0389 { 0390 /* 0391 * DataType is not a field name. 0392 * Examine first character of name for root or parent prefix operators 0393 */ 0394 switch (*AmlAddress) 0395 { 0396 case AML_ROOT_PREFIX: 0397 0398 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "RootPrefix(\\) at %p\n", 0399 AmlAddress)); 0400 0401 /* 0402 * Remember that we have a RootPrefix -- 0403 * see comment in AcpiExAllocateNameString() 0404 */ 0405 AmlAddress++; 0406 PrefixCount = ACPI_UINT32_MAX; 0407 HasPrefix = TRUE; 0408 break; 0409 0410 0411 case AML_PARENT_PREFIX: 0412 0413 /* Increment past possibly multiple parent prefixes */ 0414 0415 do 0416 { 0417 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "ParentPrefix (^) at %p\n", 0418 AmlAddress)); 0419 0420 AmlAddress++; 0421 PrefixCount++; 0422 0423 } while (*AmlAddress == AML_PARENT_PREFIX); 0424 0425 HasPrefix = TRUE; 0426 break; 0427 0428 0429 default: 0430 0431 /* Not a prefix character */ 0432 0433 break; 0434 } 0435 0436 /* Examine first character of name for name segment prefix operator */ 0437 0438 switch (*AmlAddress) 0439 { 0440 case AML_DUAL_NAME_PREFIX: 0441 0442 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "DualNamePrefix at %p\n", 0443 AmlAddress)); 0444 0445 AmlAddress++; 0446 NameString = AcpiExAllocateNameString (PrefixCount, 2); 0447 if (!NameString) 0448 { 0449 Status = AE_NO_MEMORY; 0450 break; 0451 } 0452 0453 /* Indicate that we processed a prefix */ 0454 0455 HasPrefix = TRUE; 0456 0457 Status = AcpiExNameSegment (&AmlAddress, NameString); 0458 if (ACPI_SUCCESS (Status)) 0459 { 0460 Status = AcpiExNameSegment (&AmlAddress, NameString); 0461 } 0462 break; 0463 0464 0465 case AML_MULTI_NAME_PREFIX_OP: 0466 0467 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "MultiNamePrefix at %p\n", 0468 AmlAddress)); 0469 0470 /* Fetch count of segments remaining in name path */ 0471 0472 AmlAddress++; 0473 NumSegments = *AmlAddress; 0474 0475 NameString = AcpiExAllocateNameString (PrefixCount, NumSegments); 0476 if (!NameString) 0477 { 0478 Status = AE_NO_MEMORY; 0479 break; 0480 } 0481 0482 /* Indicate that we processed a prefix */ 0483 0484 AmlAddress++; 0485 HasPrefix = TRUE; 0486 0487 while (NumSegments && 0488 (Status = AcpiExNameSegment (&AmlAddress, NameString)) == 0489 AE_OK) 0490 { 0491 NumSegments--; 0492 } 0493 0494 break; 0495 0496 0497 case 0: 0498 0499 /* NullName valid as of 8-12-98 ASL/AML Grammar Update */ 0500 0501 if (PrefixCount == ACPI_UINT32_MAX) 0502 { 0503 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 0504 "NameSeg is \"\\\" followed by NULL\n")); 0505 } 0506 0507 /* Consume the NULL byte */ 0508 0509 AmlAddress++; 0510 NameString = AcpiExAllocateNameString (PrefixCount, 0); 0511 if (!NameString) 0512 { 0513 Status = AE_NO_MEMORY; 0514 break; 0515 } 0516 0517 break; 0518 0519 0520 default: 0521 0522 /* Name segment string */ 0523 0524 NameString = AcpiExAllocateNameString (PrefixCount, 1); 0525 if (!NameString) 0526 { 0527 Status = AE_NO_MEMORY; 0528 break; 0529 } 0530 0531 Status = AcpiExNameSegment (&AmlAddress, NameString); 0532 break; 0533 } 0534 } 0535 0536 if (AE_CTRL_PENDING == Status && HasPrefix) 0537 { 0538 /* Ran out of segments after processing a prefix */ 0539 0540 ACPI_ERROR ((AE_INFO, 0541 "Malformed Name at %p", NameString)); 0542 Status = AE_AML_BAD_NAME; 0543 } 0544 0545 if (ACPI_FAILURE (Status)) 0546 { 0547 if (NameString) 0548 { 0549 ACPI_FREE (NameString); 0550 } 0551 return_ACPI_STATUS (Status); 0552 } 0553 0554 *OutNameString = NameString; 0555 *OutNameLength = (UINT32) (AmlAddress - InAmlAddress); 0556 0557 return_ACPI_STATUS (Status); 0558 } 0559 0560
[ Source navigation ] | [ Diff markup ] | [ Identifier search ] | [ general search ] |
This page was automatically generated by the 1.2.0 LXR engine. |