exstorob.c revision 202771
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 - 2010, 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 /* If Source and Target are the same, just return */ 154 155 if (SourceDesc == TargetDesc) 156 { 157 return_ACPI_STATUS (AE_OK); 158 } 159 160 /* We know that SourceDesc is a buffer by now */ 161 162 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->Buffer.Pointer); 163 Length = SourceDesc->Buffer.Length; 164 165 /* 166 * If target is a buffer of length zero or is a static buffer, 167 * allocate a new buffer of the proper length 168 */ 169 if ((TargetDesc->Buffer.Length == 0) || 170 (TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)) 171 { 172 TargetDesc->Buffer.Pointer = ACPI_ALLOCATE (Length); 173 if (!TargetDesc->Buffer.Pointer) 174 { 175 return_ACPI_STATUS (AE_NO_MEMORY); 176 } 177 178 TargetDesc->Buffer.Length = Length; 179 } 180 181 /* Copy source buffer to target buffer */ 182 183 if (Length <= TargetDesc->Buffer.Length) 184 { 185 /* Clear existing buffer and copy in the new one */ 186 187 ACPI_MEMSET (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length); 188 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, Length); 189 190#ifdef ACPI_OBSOLETE_BEHAVIOR 191 /* 192 * NOTE: ACPI versions up to 3.0 specified that the buffer must be 193 * truncated if the string is smaller than the buffer. However, "other" 194 * implementations of ACPI never did this and thus became the defacto 195 * standard. ACPI 3.0A changes this behavior such that the buffer 196 * is no longer truncated. 197 */ 198 199 /* 200 * OBSOLETE BEHAVIOR: 201 * If the original source was a string, we must truncate the buffer, 202 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer 203 * copy must not truncate the original buffer. 204 */ 205 if (OriginalSrcType == ACPI_TYPE_STRING) 206 { 207 /* Set the new length of the target */ 208 209 TargetDesc->Buffer.Length = Length; 210 } 211#endif 212 } 213 else 214 { 215 /* Truncate the source, copy only what will fit */ 216 217 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, 218 TargetDesc->Buffer.Length); 219 220 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 221 "Truncating source buffer from %X to %X\n", 222 Length, TargetDesc->Buffer.Length)); 223 } 224 225 /* Copy flags */ 226 227 TargetDesc->Buffer.Flags = SourceDesc->Buffer.Flags; 228 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 229 return_ACPI_STATUS (AE_OK); 230} 231 232 233/******************************************************************************* 234 * 235 * FUNCTION: AcpiExStoreStringToString 236 * 237 * PARAMETERS: SourceDesc - Source object to copy 238 * TargetDesc - Destination object of the copy 239 * 240 * RETURN: Status 241 * 242 * DESCRIPTION: Copy a String object to another String object 243 * 244 ******************************************************************************/ 245 246ACPI_STATUS 247AcpiExStoreStringToString ( 248 ACPI_OPERAND_OBJECT *SourceDesc, 249 ACPI_OPERAND_OBJECT *TargetDesc) 250{ 251 UINT32 Length; 252 UINT8 *Buffer; 253 254 255 ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString, SourceDesc); 256 257 258 /* If Source and Target are the same, just return */ 259 260 if (SourceDesc == TargetDesc) 261 { 262 return_ACPI_STATUS (AE_OK); 263 } 264 265 /* We know that SourceDesc is a string by now */ 266 267 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->String.Pointer); 268 Length = SourceDesc->String.Length; 269 270 /* 271 * Replace existing string value if it will fit and the string 272 * pointer is not a static pointer (part of an ACPI table) 273 */ 274 if ((Length < TargetDesc->String.Length) && 275 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 276 { 277 /* 278 * String will fit in existing non-static buffer. 279 * Clear old string and copy in the new one 280 */ 281 ACPI_MEMSET (TargetDesc->String.Pointer, 0, 282 (ACPI_SIZE) TargetDesc->String.Length + 1); 283 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 284 } 285 else 286 { 287 /* 288 * Free the current buffer, then allocate a new buffer 289 * large enough to hold the value 290 */ 291 if (TargetDesc->String.Pointer && 292 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 293 { 294 /* Only free if not a pointer into the DSDT */ 295 296 ACPI_FREE (TargetDesc->String.Pointer); 297 } 298 299 TargetDesc->String.Pointer = ACPI_ALLOCATE_ZEROED ( 300 (ACPI_SIZE) Length + 1); 301 if (!TargetDesc->String.Pointer) 302 { 303 return_ACPI_STATUS (AE_NO_MEMORY); 304 } 305 306 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 307 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 308 } 309 310 /* Set the new target length */ 311 312 TargetDesc->String.Length = Length; 313 return_ACPI_STATUS (AE_OK); 314} 315 316 317