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Warning, cross-references for /kernel/drivers/acpica/exstorob.c need to be fixed.
0001 0002 /****************************************************************************** 0003 * 0004 * Module Name: exstorob - AML Interpreter object store support, store to object 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 __EXSTOROB_C__ 0118 0119 #include "acpi.h" 0120 #include "accommon.h" 0121 #include "acinterp.h" 0122 0123 0124 #define _COMPONENT ACPI_EXECUTER 0125 ACPI_MODULE_NAME ("exstorob") 0126 0127 0128 /******************************************************************************* 0129 * 0130 * FUNCTION: AcpiExStoreBufferToBuffer 0131 * 0132 * PARAMETERS: SourceDesc - Source object to copy 0133 * TargetDesc - Destination object of the copy 0134 * 0135 * RETURN: Status 0136 * 0137 * DESCRIPTION: Copy a buffer object to another buffer object. 0138 * 0139 ******************************************************************************/ 0140 0141 ACPI_STATUS 0142 AcpiExStoreBufferToBuffer ( 0143 ACPI_OPERAND_OBJECT *SourceDesc, 0144 ACPI_OPERAND_OBJECT *TargetDesc) 0145 { 0146 UINT32 Length; 0147 UINT8 *Buffer; 0148 0149 0150 ACPI_FUNCTION_TRACE_PTR (ExStoreBufferToBuffer, SourceDesc); 0151 0152 0153 /* We know that SourceDesc is a buffer by now */ 0154 0155 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->Buffer.Pointer); 0156 Length = SourceDesc->Buffer.Length; 0157 0158 /* 0159 * If target is a buffer of length zero or is a static buffer, 0160 * allocate a new buffer of the proper length 0161 */ 0162 if ((TargetDesc->Buffer.Length == 0) || 0163 (TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)) 0164 { 0165 TargetDesc->Buffer.Pointer = ACPI_ALLOCATE (Length); 0166 if (!TargetDesc->Buffer.Pointer) 0167 { 0168 return_ACPI_STATUS (AE_NO_MEMORY); 0169 } 0170 0171 TargetDesc->Buffer.Length = Length; 0172 } 0173 0174 /* Copy source buffer to target buffer */ 0175 0176 if (Length <= TargetDesc->Buffer.Length) 0177 { 0178 /* Clear existing buffer and copy in the new one */ 0179 0180 ACPI_MEMSET (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length); 0181 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, Length); 0182 0183 #ifdef ACPI_OBSOLETE_BEHAVIOR 0184 /* 0185 * NOTE: ACPI versions up to 3.0 specified that the buffer must be 0186 * truncated if the string is smaller than the buffer. However, "other" 0187 * implementations of ACPI never did this and thus became the defacto 0188 * standard. ACPI 3.0A changes this behavior such that the buffer 0189 * is no longer truncated. 0190 */ 0191 0192 /* 0193 * OBSOLETE BEHAVIOR: 0194 * If the original source was a string, we must truncate the buffer, 0195 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer 0196 * copy must not truncate the original buffer. 0197 */ 0198 if (OriginalSrcType == ACPI_TYPE_STRING) 0199 { 0200 /* Set the new length of the target */ 0201 0202 TargetDesc->Buffer.Length = Length; 0203 } 0204 #endif 0205 } 0206 else 0207 { 0208 /* Truncate the source, copy only what will fit */ 0209 0210 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, 0211 TargetDesc->Buffer.Length); 0212 0213 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 0214 "Truncating source buffer from %X to %X\n", 0215 Length, TargetDesc->Buffer.Length)); 0216 } 0217 0218 /* Copy flags */ 0219 0220 TargetDesc->Buffer.Flags = SourceDesc->Buffer.Flags; 0221 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 0222 return_ACPI_STATUS (AE_OK); 0223 } 0224 0225 0226 /******************************************************************************* 0227 * 0228 * FUNCTION: AcpiExStoreStringToString 0229 * 0230 * PARAMETERS: SourceDesc - Source object to copy 0231 * TargetDesc - Destination object of the copy 0232 * 0233 * RETURN: Status 0234 * 0235 * DESCRIPTION: Copy a String object to another String object 0236 * 0237 ******************************************************************************/ 0238 0239 ACPI_STATUS 0240 AcpiExStoreStringToString ( 0241 ACPI_OPERAND_OBJECT *SourceDesc, 0242 ACPI_OPERAND_OBJECT *TargetDesc) 0243 { 0244 UINT32 Length; 0245 UINT8 *Buffer; 0246 0247 0248 ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString, SourceDesc); 0249 0250 0251 /* We know that SourceDesc is a string by now */ 0252 0253 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->String.Pointer); 0254 Length = SourceDesc->String.Length; 0255 0256 /* 0257 * Replace existing string value if it will fit and the string 0258 * pointer is not a static pointer (part of an ACPI table) 0259 */ 0260 if ((Length < TargetDesc->String.Length) && 0261 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 0262 { 0263 /* 0264 * String will fit in existing non-static buffer. 0265 * Clear old string and copy in the new one 0266 */ 0267 ACPI_MEMSET (TargetDesc->String.Pointer, 0, 0268 (ACPI_SIZE) TargetDesc->String.Length + 1); 0269 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 0270 } 0271 else 0272 { 0273 /* 0274 * Free the current buffer, then allocate a new buffer 0275 * large enough to hold the value 0276 */ 0277 if (TargetDesc->String.Pointer && 0278 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 0279 { 0280 /* Only free if not a pointer into the DSDT */ 0281 0282 ACPI_FREE (TargetDesc->String.Pointer); 0283 } 0284 0285 TargetDesc->String.Pointer = ACPI_ALLOCATE_ZEROED ( 0286 (ACPI_SIZE) Length + 1); 0287 if (!TargetDesc->String.Pointer) 0288 { 0289 return_ACPI_STATUS (AE_NO_MEMORY); 0290 } 0291 0292 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 0293 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 0294 } 0295 0296 /* Set the new target length */ 0297 0298 TargetDesc->String.Length = Length; 0299 return_ACPI_STATUS (AE_OK); 0300 } 0301 0302
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