1/****************************************************************************** 2 * 3 * Module Name: exstorob - AML Interpreter object store support, store to object 4 * 5 *****************************************************************************/ 6 7/****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2012, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116#define __EXSTOROB_C__ 117 118#include "acpi.h" 119#include "accommon.h" 120#include "acinterp.h" 121 122 123#define _COMPONENT ACPI_EXECUTER 124 ACPI_MODULE_NAME ("exstorob") 125 126 127/******************************************************************************* 128 * 129 * FUNCTION: AcpiExStoreBufferToBuffer 130 * 131 * PARAMETERS: SourceDesc - Source object to copy 132 * TargetDesc - Destination object of the copy 133 * 134 * RETURN: Status 135 * 136 * DESCRIPTION: Copy a buffer object to another buffer object. 137 * 138 ******************************************************************************/ 139 140ACPI_STATUS 141AcpiExStoreBufferToBuffer ( 142 ACPI_OPERAND_OBJECT *SourceDesc, 143 ACPI_OPERAND_OBJECT *TargetDesc) 144{ 145 UINT32 Length; 146 UINT8 *Buffer; 147 148 149 ACPI_FUNCTION_TRACE_PTR (ExStoreBufferToBuffer, SourceDesc); 150 151 152 /* If Source and Target are the same, just return */ 153 154 if (SourceDesc == TargetDesc) 155 { 156 return_ACPI_STATUS (AE_OK); 157 } 158 159 /* We know that SourceDesc is a buffer by now */ 160 161 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->Buffer.Pointer); 162 Length = SourceDesc->Buffer.Length; 163 164 /* 165 * If target is a buffer of length zero or is a static buffer, 166 * allocate a new buffer of the proper length 167 */ 168 if ((TargetDesc->Buffer.Length == 0) || 169 (TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)) 170 { 171 TargetDesc->Buffer.Pointer = ACPI_ALLOCATE (Length); 172 if (!TargetDesc->Buffer.Pointer) 173 { 174 return_ACPI_STATUS (AE_NO_MEMORY); 175 } 176 177 TargetDesc->Buffer.Length = Length; 178 } 179 180 /* Copy source buffer to target buffer */ 181 182 if (Length <= TargetDesc->Buffer.Length) 183 { 184 /* Clear existing buffer and copy in the new one */ 185 186 ACPI_MEMSET (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length); 187 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, Length); 188 189#ifdef ACPI_OBSOLETE_BEHAVIOR 190 /* 191 * NOTE: ACPI versions up to 3.0 specified that the buffer must be 192 * truncated if the string is smaller than the buffer. However, "other" 193 * implementations of ACPI never did this and thus became the defacto 194 * standard. ACPI 3.0A changes this behavior such that the buffer 195 * is no longer truncated. 196 */ 197 198 /* 199 * OBSOLETE BEHAVIOR: 200 * If the original source was a string, we must truncate the buffer, 201 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer 202 * copy must not truncate the original buffer. 203 */ 204 if (OriginalSrcType == ACPI_TYPE_STRING) 205 { 206 /* Set the new length of the target */ 207 208 TargetDesc->Buffer.Length = Length; 209 } 210#endif 211 } 212 else 213 { 214 /* Truncate the source, copy only what will fit */ 215 216 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, 217 TargetDesc->Buffer.Length); 218 219 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 220 "Truncating source buffer from %X to %X\n", 221 Length, TargetDesc->Buffer.Length)); 222 } 223 224 /* Copy flags */ 225 226 TargetDesc->Buffer.Flags = SourceDesc->Buffer.Flags; 227 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 228 return_ACPI_STATUS (AE_OK); 229} 230 231 232/******************************************************************************* 233 * 234 * FUNCTION: AcpiExStoreStringToString 235 * 236 * PARAMETERS: SourceDesc - Source object to copy 237 * TargetDesc - Destination object of the copy 238 * 239 * RETURN: Status 240 * 241 * DESCRIPTION: Copy a String object to another String object 242 * 243 ******************************************************************************/ 244 245ACPI_STATUS 246AcpiExStoreStringToString ( 247 ACPI_OPERAND_OBJECT *SourceDesc, 248 ACPI_OPERAND_OBJECT *TargetDesc) 249{ 250 UINT32 Length; 251 UINT8 *Buffer; 252 253 254 ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString, SourceDesc); 255 256 257 /* If Source and Target are the same, just return */ 258 259 if (SourceDesc == TargetDesc) 260 { 261 return_ACPI_STATUS (AE_OK); 262 } 263 264 /* We know that SourceDesc is a string by now */ 265 266 Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->String.Pointer); 267 Length = SourceDesc->String.Length; 268 269 /* 270 * Replace existing string value if it will fit and the string 271 * pointer is not a static pointer (part of an ACPI table) 272 */ 273 if ((Length < TargetDesc->String.Length) && 274 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 275 { 276 /* 277 * String will fit in existing non-static buffer. 278 * Clear old string and copy in the new one 279 */ 280 ACPI_MEMSET (TargetDesc->String.Pointer, 0, 281 (ACPI_SIZE) TargetDesc->String.Length + 1); 282 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 283 } 284 else 285 { 286 /* 287 * Free the current buffer, then allocate a new buffer 288 * large enough to hold the value 289 */ 290 if (TargetDesc->String.Pointer && 291 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 292 { 293 /* Only free if not a pointer into the DSDT */ 294 295 ACPI_FREE (TargetDesc->String.Pointer); 296 } 297 298 TargetDesc->String.Pointer = ACPI_ALLOCATE_ZEROED ( 299 (ACPI_SIZE) Length + 1); 300 if (!TargetDesc->String.Pointer) 301 { 302 return_ACPI_STATUS (AE_NO_MEMORY); 303 } 304 305 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 306 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 307 } 308 309 /* Set the new target length */ 310 311 TargetDesc->String.Length = Length; 312 return_ACPI_STATUS (AE_OK); 313} 314