exstorob.c revision 114237
1 2/****************************************************************************** 3 * 4 * Module Name: exstorob - AML Interpreter object store support, store to object 5 * $Revision: 50 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __EXSTOROB_C__ 119 120#include "acpi.h" 121#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 /* 154 * We know that SourceDesc is a buffer by now 155 */ 156 Buffer = (UINT8 *) SourceDesc->Buffer.Pointer; 157 Length = SourceDesc->Buffer.Length; 158 159 /* 160 * If target is a buffer of length zero or is a static buffer, 161 * allocate a new buffer of the proper length 162 */ 163 if ((TargetDesc->Buffer.Length == 0) || 164 (TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)) 165 { 166 TargetDesc->Buffer.Pointer = ACPI_MEM_ALLOCATE (Length); 167 if (!TargetDesc->Buffer.Pointer) 168 { 169 return_ACPI_STATUS (AE_NO_MEMORY); 170 } 171 172 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 173 TargetDesc->Buffer.Length = Length; 174 } 175 176 /* 177 * Buffer is a static allocation, 178 * only place what will fit in the buffer. 179 */ 180 if (Length <= TargetDesc->Buffer.Length) 181 { 182 /* Clear existing buffer and copy in the new one */ 183 184 ACPI_MEMSET (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length); 185 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, Length); 186 } 187 else 188 { 189 /* 190 * Truncate the source, copy only what will fit 191 */ 192 ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, TargetDesc->Buffer.Length); 193 194 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 195 "Truncating src buffer from %X to %X\n", 196 Length, TargetDesc->Buffer.Length)); 197 } 198 199 /* Copy flags */ 200 201 TargetDesc->Buffer.Flags = SourceDesc->Buffer.Flags; 202 return_ACPI_STATUS (AE_OK); 203} 204 205 206/******************************************************************************* 207 * 208 * FUNCTION: AcpiExStoreStringToString 209 * 210 * PARAMETERS: SourceDesc - Source object to copy 211 * TargetDesc - Destination object of the copy 212 * 213 * RETURN: Status 214 * 215 * DESCRIPTION: Copy a String object to another String object 216 * 217 ******************************************************************************/ 218 219ACPI_STATUS 220AcpiExStoreStringToString ( 221 ACPI_OPERAND_OBJECT *SourceDesc, 222 ACPI_OPERAND_OBJECT *TargetDesc) 223{ 224 UINT32 Length; 225 UINT8 *Buffer; 226 227 228 ACPI_FUNCTION_TRACE_PTR ("ExStoreStringToString", SourceDesc); 229 230 231 /* 232 * We know that SourceDesc is a string by now. 233 */ 234 Buffer = (UINT8 *) SourceDesc->String.Pointer; 235 Length = SourceDesc->String.Length; 236 237 /* 238 * Replace existing string value if it will fit and the string 239 * pointer is not a static pointer (part of an ACPI table) 240 */ 241 if ((Length < TargetDesc->String.Length) && 242 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 243 { 244 /* 245 * String will fit in existing non-static buffer. 246 * Clear old string and copy in the new one 247 */ 248 ACPI_MEMSET (TargetDesc->String.Pointer, 0, (ACPI_SIZE) TargetDesc->String.Length + 1); 249 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 250 } 251 else 252 { 253 /* 254 * Free the current buffer, then allocate a new buffer 255 * large enough to hold the value 256 */ 257 if (TargetDesc->String.Pointer && 258 (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) 259 { 260 /* 261 * Only free if not a pointer into the DSDT 262 */ 263 ACPI_MEM_FREE (TargetDesc->String.Pointer); 264 } 265 266 TargetDesc->String.Pointer = ACPI_MEM_CALLOCATE ((ACPI_SIZE) Length + 1); 267 if (!TargetDesc->String.Pointer) 268 { 269 return_ACPI_STATUS (AE_NO_MEMORY); 270 } 271 272 TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; 273 ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); 274 } 275 276 /* Set the new target length */ 277 278 TargetDesc->String.Length = Length; 279 return_ACPI_STATUS (AE_OK); 280} 281 282 283