exstorob.c revision 193341
1 2/****************************************************************************** 3 * 4 * Module Name: exstorob - AML Interpreter object store support, store to object 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#define __EXSTOROB_C__ 118 119#include <contrib/dev/acpica/include/acpi.h> 120#include <contrib/dev/acpica/include/accommon.h> 121#include <contrib/dev/acpica/include/acinterp.h> 122 123 124#define _COMPONENT ACPI_EXECUTER 125 ACPI_MODULE_NAME ("exstorob") 126 127 128/******************************************************************************* 129 * 130 * FUNCTION: AcpiExStoreBufferToBuffer 131 * 132 * PARAMETERS: SourceDesc - Source object to copy 133 * TargetDesc - Destination object of the copy 134 * 135 * RETURN: Status 136 * 137 * DESCRIPTION: Copy a buffer object to another buffer object. 138 * 139 ******************************************************************************/ 140 141ACPI_STATUS 142AcpiExStoreBufferToBuffer ( 143 ACPI_OPERAND_OBJECT *SourceDesc, 144 ACPI_OPERAND_OBJECT *TargetDesc) 145{ 146 UINT32 Length; 147 UINT8 *Buffer; 148 149 150 ACPI_FUNCTION_TRACE_PTR (ExStoreBufferToBuffer, SourceDesc); 151 152 153 /* We know that SourceDesc is a buffer by now */ 154 155 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->Buffer.Pointer); 156 Length = SourceDesc->Buffer.Length; 157 158 /* 159 * If target is a buffer of length zero or is a static buffer, 160 * allocate a new buffer of the proper length 161 */ 162 if ((TargetDesc->Buffer.Length == 0) || 163 (TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)) 164 { 165 TargetDesc->Buffer.Pointer = ACPI_ALLOCATE (Length); 166 if (!TargetDesc->Buffer.Pointer) 167 { 168 return_ACPI_STATUS (AE_NO_MEMORY); 169 } 170 171 TargetDesc->Buffer.Length = Length; 172 } 173 174 /* Copy source buffer to target buffer */ 175 176 if (Length <= TargetDesc->Buffer.Length) 177 { 178 /* Clear existing buffer and copy in the new one */ 179 180 ACPI_MEMSET (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length); 181 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, Length); 182 183#ifdef ACPI_OBSOLETE_BEHAVIOR 184 /* 185 * NOTE: ACPI versions up to 3.0 specified that the buffer must be 186 * truncated if the string is smaller than the buffer. However, "other" 187 * implementations of ACPI never did this and thus became the defacto 188 * standard. ACPI 3.0A changes this behavior such that the buffer 189 * is no longer truncated. 190 */ 191 192 /* 193 * OBSOLETE BEHAVIOR: 194 * If the original source was a string, we must truncate the buffer, 195 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer 196 * copy must not truncate the original buffer. 197 */ 198 if (OriginalSrcType == ACPI_TYPE_STRING) 199 { 200 /* Set the new length of the target */ 201 202 TargetDesc->Buffer.Length = Length; 203 } 204#endif 205 } 206 else 207 { 208 /* Truncate the source, copy only what will fit */ 209 210 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, 211 TargetDesc->Buffer.Length); 212 213 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 214 "Truncating source buffer from %X to %X\n", 215 Length, TargetDesc->Buffer.Length)); 216 } 217 218 /* Copy flags */ 219 220 TargetDesc->Buffer.Flags = SourceDesc->Buffer.Flags; 221 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 222 return_ACPI_STATUS (AE_OK); 223} 224 225 226/******************************************************************************* 227 * 228 * FUNCTION: AcpiExStoreStringToString 229 * 230 * PARAMETERS: SourceDesc - Source object to copy 231 * TargetDesc - Destination object of the copy 232 * 233 * RETURN: Status 234 * 235 * DESCRIPTION: Copy a String object to another String object 236 * 237 ******************************************************************************/ 238 239ACPI_STATUS 240AcpiExStoreStringToString ( 241 ACPI_OPERAND_OBJECT *SourceDesc, 242 ACPI_OPERAND_OBJECT *TargetDesc) 243{ 244 UINT32 Length; 245 UINT8 *Buffer; 246 247 248 ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString, SourceDesc); 249 250 251 /* We know that SourceDesc is a string by now */ 252 253 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->String.Pointer); 254 Length = SourceDesc->String.Length; 255 256 /* 257 * Replace existing string value if it will fit and the string 258 * pointer is not a static pointer (part of an ACPI table) 259 */ 260 if ((Length < TargetDesc->String.Length) && 261 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 262 { 263 /* 264 * String will fit in existing non-static buffer. 265 * Clear old string and copy in the new one 266 */ 267 ACPI_MEMSET (TargetDesc->String.Pointer, 0, 268 (ACPI_SIZE) TargetDesc->String.Length + 1); 269 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 270 } 271 else 272 { 273 /* 274 * Free the current buffer, then allocate a new buffer 275 * large enough to hold the value 276 */ 277 if (TargetDesc->String.Pointer && 278 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 279 { 280 /* Only free if not a pointer into the DSDT */ 281 282 ACPI_FREE (TargetDesc->String.Pointer); 283 } 284 285 TargetDesc->String.Pointer = ACPI_ALLOCATE_ZEROED ( 286 (ACPI_SIZE) Length + 1); 287 if (!TargetDesc->String.Pointer) 288 { 289 return_ACPI_STATUS (AE_NO_MEMORY); 290 } 291 292 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 293 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 294 } 295 296 /* Set the new target length */ 297 298 TargetDesc->String.Length = Length; 299 return_ACPI_STATUS (AE_OK); 300} 301 302 303