/******************************************************************************
*
* Module Name: exstorob - AML Interpreter object store support, store to object
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __EXSTOROB_C__
#include "acpi.h"
#include "accommon.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exstorob")
/*******************************************************************************
*
* FUNCTION: AcpiExStoreBufferToBuffer
*
* PARAMETERS: SourceDesc - Source object to copy
* TargetDesc - Destination object of the copy
*
* RETURN: Status
*
* DESCRIPTION: Copy a buffer object to another buffer object.
*
******************************************************************************/
ACPI_STATUS
AcpiExStoreBufferToBuffer (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT *TargetDesc)
{
UINT32 Length;
UINT8 *Buffer;
ACPI_FUNCTION_TRACE_PTR (ExStoreBufferToBuffer, SourceDesc);
/* If Source and Target are the same, just return */
if (SourceDesc == TargetDesc)
{
return_ACPI_STATUS (AE_OK);
}
/* We know that SourceDesc is a buffer by now */
Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->Buffer.Pointer);
Length = SourceDesc->Buffer.Length;
/*
* If target is a buffer of length zero or is a static buffer,
* allocate a new buffer of the proper length
*/
if ((TargetDesc->Buffer.Length == 0) ||
(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))
{
TargetDesc->Buffer.Pointer = ACPI_ALLOCATE (Length);
if (!TargetDesc->Buffer.Pointer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
TargetDesc->Buffer.Length = Length;
}
/* Copy source buffer to target buffer */
if (Length <= TargetDesc->Buffer.Length)
{
/* Clear existing buffer and copy in the new one */
ACPI_MEMSET (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length);
ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, Length);
#ifdef ACPI_OBSOLETE_BEHAVIOR
/*
* NOTE: ACPI versions up to 3.0 specified that the buffer must be
* truncated if the string is smaller than the buffer. However, "other"
* implementations of ACPI never did this and thus became the defacto
* standard. ACPI 3.0A changes this behavior such that the buffer
* is no longer truncated.
*/
/*
* OBSOLETE BEHAVIOR:
* If the original source was a string, we must truncate the buffer,
* according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer
* copy must not truncate the original buffer.
*/
if (OriginalSrcType == ACPI_TYPE_STRING)
{
/* Set the new length of the target */
TargetDesc->Buffer.Length = Length;
}
#endif
}
else
{
/* Truncate the source, copy only what will fit */
ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer,
TargetDesc->Buffer.Length);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Truncating source buffer from %X to %X\n",
Length, TargetDesc->Buffer.Length));
}
/* Copy flags */
TargetDesc->Buffer.Flags = SourceDesc->Buffer.Flags;
TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiExStoreStringToString
*
* PARAMETERS: SourceDesc - Source object to copy
* TargetDesc - Destination object of the copy
*
* RETURN: Status
*
* DESCRIPTION: Copy a String object to another String object
*
******************************************************************************/
ACPI_STATUS
AcpiExStoreStringToString (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT *TargetDesc)
{
UINT32 Length;
UINT8 *Buffer;
ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString, SourceDesc);
/* If Source and Target are the same, just return */
if (SourceDesc == TargetDesc)
{
return_ACPI_STATUS (AE_OK);
}
/* We know that SourceDesc is a string by now */
Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->String.Pointer);
Length = SourceDesc->String.Length;
/*
* Replace existing string value if it will fit and the string
* pointer is not a static pointer (part of an ACPI table)
*/
if ((Length < TargetDesc->String.Length) &&
(!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)))
{
/*
* String will fit in existing non-static buffer.
* Clear old string and copy in the new one
*/
ACPI_MEMSET (TargetDesc->String.Pointer, 0,
(ACPI_SIZE) TargetDesc->String.Length + 1);
ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length);
}
else
{
/*
* Free the current buffer, then allocate a new buffer
* large enough to hold the value
*/
if (TargetDesc->String.Pointer &&
(!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)))
{
/* Only free if not a pointer into the DSDT */
ACPI_FREE (TargetDesc->String.Pointer);
}
TargetDesc->String.Pointer = ACPI_ALLOCATE_ZEROED (
(ACPI_SIZE) Length + 1);
if (!TargetDesc->String.Pointer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER;
ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length);
}
/* Set the new target length */
TargetDesc->String.Length = Length;
return_ACPI_STATUS (AE_OK);
}