| /****************************************************************************** |
| * |
| * Module Name: exstorob - AML Interpreter object store support, store to object |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2015, Intel Corp. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions, and the following disclaimer, |
| * without modification. |
| * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| * substantially similar to the "NO WARRANTY" disclaimer below |
| * ("Disclaimer") and any redistribution must be conditioned upon |
| * including a substantially similar Disclaimer requirement for further |
| * binary redistribution. |
| * 3. Neither the names of the above-listed copyright holders nor the names |
| * of any contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * NO WARRANTY |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGES. |
| */ |
| |
| #include <contrib/dev/acpica/include/acpi.h> |
| #include <contrib/dev/acpica/include/accommon.h> |
| #include <contrib/dev/acpica/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 */ |
| |
| memset (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length); |
| 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 */ |
| |
| 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 |
| */ |
| memset (TargetDesc->String.Pointer, 0, |
| (ACPI_SIZE) TargetDesc->String.Length + 1); |
| 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; |
| memcpy (TargetDesc->String.Pointer, Buffer, Length); |
| } |
| |
| /* Set the new target length */ |
| |
| TargetDesc->String.Length = Length; |
| return_ACPI_STATUS (AE_OK); |
| } |