1 /******************************************************************************
3 * Module Name: exstorob - AML Interpreter object store support, store to object
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2015, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************/
117 #include "accommon.h"
118 #include "acinterp.h"
121 #define _COMPONENT ACPI_EXECUTER
122 ACPI_MODULE_NAME ("exstorob")
125 /*******************************************************************************
127 * FUNCTION: AcpiExStoreBufferToBuffer
129 * PARAMETERS: SourceDesc - Source object to copy
130 * TargetDesc - Destination object of the copy
134 * DESCRIPTION: Copy a buffer object to another buffer object.
136 ******************************************************************************/
139 AcpiExStoreBufferToBuffer (
140 ACPI_OPERAND_OBJECT
*SourceDesc
,
141 ACPI_OPERAND_OBJECT
*TargetDesc
)
147 ACPI_FUNCTION_TRACE_PTR (ExStoreBufferToBuffer
, SourceDesc
);
150 /* If Source and Target are the same, just return */
152 if (SourceDesc
== TargetDesc
)
154 return_ACPI_STATUS (AE_OK
);
157 /* We know that SourceDesc is a buffer by now */
159 Buffer
= ACPI_CAST_PTR (UINT8
, SourceDesc
->Buffer
.Pointer
);
160 Length
= SourceDesc
->Buffer
.Length
;
163 * If target is a buffer of length zero or is a static buffer,
164 * allocate a new buffer of the proper length
166 if ((TargetDesc
->Buffer
.Length
== 0) ||
167 (TargetDesc
->Common
.Flags
& AOPOBJ_STATIC_POINTER
))
169 TargetDesc
->Buffer
.Pointer
= ACPI_ALLOCATE (Length
);
170 if (!TargetDesc
->Buffer
.Pointer
)
172 return_ACPI_STATUS (AE_NO_MEMORY
);
175 TargetDesc
->Buffer
.Length
= Length
;
178 /* Copy source buffer to target buffer */
180 if (Length
<= TargetDesc
->Buffer
.Length
)
182 /* Clear existing buffer and copy in the new one */
184 ACPI_MEMSET (TargetDesc
->Buffer
.Pointer
, 0, TargetDesc
->Buffer
.Length
);
185 ACPI_MEMCPY (TargetDesc
->Buffer
.Pointer
, Buffer
, Length
);
187 #ifdef ACPI_OBSOLETE_BEHAVIOR
189 * NOTE: ACPI versions up to 3.0 specified that the buffer must be
190 * truncated if the string is smaller than the buffer. However, "other"
191 * implementations of ACPI never did this and thus became the defacto
192 * standard. ACPI 3.0A changes this behavior such that the buffer
193 * is no longer truncated.
198 * If the original source was a string, we must truncate the buffer,
199 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer
200 * copy must not truncate the original buffer.
202 if (OriginalSrcType
== ACPI_TYPE_STRING
)
204 /* Set the new length of the target */
206 TargetDesc
->Buffer
.Length
= Length
;
212 /* Truncate the source, copy only what will fit */
214 ACPI_MEMCPY (TargetDesc
->Buffer
.Pointer
, Buffer
,
215 TargetDesc
->Buffer
.Length
);
217 ACPI_DEBUG_PRINT ((ACPI_DB_INFO
,
218 "Truncating source buffer from %X to %X\n",
219 Length
, TargetDesc
->Buffer
.Length
));
224 TargetDesc
->Buffer
.Flags
= SourceDesc
->Buffer
.Flags
;
225 TargetDesc
->Common
.Flags
&= ~AOPOBJ_STATIC_POINTER
;
226 return_ACPI_STATUS (AE_OK
);
230 /*******************************************************************************
232 * FUNCTION: AcpiExStoreStringToString
234 * PARAMETERS: SourceDesc - Source object to copy
235 * TargetDesc - Destination object of the copy
239 * DESCRIPTION: Copy a String object to another String object
241 ******************************************************************************/
244 AcpiExStoreStringToString (
245 ACPI_OPERAND_OBJECT
*SourceDesc
,
246 ACPI_OPERAND_OBJECT
*TargetDesc
)
252 ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString
, SourceDesc
);
255 /* If Source and Target are the same, just return */
257 if (SourceDesc
== TargetDesc
)
259 return_ACPI_STATUS (AE_OK
);
262 /* We know that SourceDesc is a string by now */
264 Buffer
= ACPI_CAST_PTR (UINT8
, SourceDesc
->String
.Pointer
);
265 Length
= SourceDesc
->String
.Length
;
268 * Replace existing string value if it will fit and the string
269 * pointer is not a static pointer (part of an ACPI table)
271 if ((Length
< TargetDesc
->String
.Length
) &&
272 (!(TargetDesc
->Common
.Flags
& AOPOBJ_STATIC_POINTER
)))
275 * String will fit in existing non-static buffer.
276 * Clear old string and copy in the new one
278 ACPI_MEMSET (TargetDesc
->String
.Pointer
, 0,
279 (ACPI_SIZE
) TargetDesc
->String
.Length
+ 1);
280 ACPI_MEMCPY (TargetDesc
->String
.Pointer
, Buffer
, Length
);
285 * Free the current buffer, then allocate a new buffer
286 * large enough to hold the value
288 if (TargetDesc
->String
.Pointer
&&
289 (!(TargetDesc
->Common
.Flags
& AOPOBJ_STATIC_POINTER
)))
291 /* Only free if not a pointer into the DSDT */
293 ACPI_FREE (TargetDesc
->String
.Pointer
);
296 TargetDesc
->String
.Pointer
= ACPI_ALLOCATE_ZEROED (
297 (ACPI_SIZE
) Length
+ 1);
298 if (!TargetDesc
->String
.Pointer
)
300 return_ACPI_STATUS (AE_NO_MEMORY
);
303 TargetDesc
->Common
.Flags
&= ~AOPOBJ_STATIC_POINTER
;
304 ACPI_MEMCPY (TargetDesc
->String
.Pointer
, Buffer
, Length
);
307 /* Set the new target length */
309 TargetDesc
->String
.Length
= Length
;
310 return_ACPI_STATUS (AE_OK
);