0,0 → 1,220 |
/****************************************************************************** |
* |
* 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 <acpi/acpi.h> |
#include "accommon.h" |
#include "acinterp.h" |
|
#define _COMPONENT ACPI_EXECUTER |
ACPI_MODULE_NAME("exstorob") |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ex_store_buffer_to_buffer |
* |
* PARAMETERS: source_desc - Source object to copy |
* target_desc - Destination object of the copy |
* |
* RETURN: Status |
* |
* DESCRIPTION: Copy a buffer object to another buffer object. |
* |
******************************************************************************/ |
acpi_status |
acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc, |
union acpi_operand_object *target_desc) |
{ |
u32 length; |
u8 *buffer; |
|
ACPI_FUNCTION_TRACE_PTR(ex_store_buffer_to_buffer, source_desc); |
|
/* If Source and Target are the same, just return */ |
|
if (source_desc == target_desc) { |
return_ACPI_STATUS(AE_OK); |
} |
|
/* We know that source_desc is a buffer by now */ |
|
buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer); |
length = source_desc->buffer.length; |
|
/* |
* If target is a buffer of length zero or is a static buffer, |
* allocate a new buffer of the proper length |
*/ |
if ((target_desc->buffer.length == 0) || |
(target_desc->common.flags & AOPOBJ_STATIC_POINTER)) { |
target_desc->buffer.pointer = ACPI_ALLOCATE(length); |
if (!target_desc->buffer.pointer) { |
return_ACPI_STATUS(AE_NO_MEMORY); |
} |
|
target_desc->buffer.length = length; |
} |
|
/* Copy source buffer to target buffer */ |
|
if (length <= target_desc->buffer.length) { |
|
/* Clear existing buffer and copy in the new one */ |
|
memset(target_desc->buffer.pointer, 0, |
target_desc->buffer.length); |
memcpy(target_desc->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 (original_src_type == ACPI_TYPE_STRING) { |
|
/* Set the new length of the target */ |
|
target_desc->buffer.length = length; |
} |
#endif |
} else { |
/* Truncate the source, copy only what will fit */ |
|
memcpy(target_desc->buffer.pointer, buffer, |
target_desc->buffer.length); |
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
"Truncating source buffer from %X to %X\n", |
length, target_desc->buffer.length)); |
} |
|
/* Copy flags */ |
|
target_desc->buffer.flags = source_desc->buffer.flags; |
target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER; |
return_ACPI_STATUS(AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ex_store_string_to_string |
* |
* PARAMETERS: source_desc - Source object to copy |
* target_desc - Destination object of the copy |
* |
* RETURN: Status |
* |
* DESCRIPTION: Copy a String object to another String object |
* |
******************************************************************************/ |
|
acpi_status |
acpi_ex_store_string_to_string(union acpi_operand_object *source_desc, |
union acpi_operand_object *target_desc) |
{ |
u32 length; |
u8 *buffer; |
|
ACPI_FUNCTION_TRACE_PTR(ex_store_string_to_string, source_desc); |
|
/* If Source and Target are the same, just return */ |
|
if (source_desc == target_desc) { |
return_ACPI_STATUS(AE_OK); |
} |
|
/* We know that source_desc is a string by now */ |
|
buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer); |
length = source_desc->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 < target_desc->string.length) && |
(!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) { |
/* |
* String will fit in existing non-static buffer. |
* Clear old string and copy in the new one |
*/ |
memset(target_desc->string.pointer, 0, |
(acpi_size) target_desc->string.length + 1); |
memcpy(target_desc->string.pointer, buffer, length); |
} else { |
/* |
* Free the current buffer, then allocate a new buffer |
* large enough to hold the value |
*/ |
if (target_desc->string.pointer && |
(!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) { |
|
/* Only free if not a pointer into the DSDT */ |
|
ACPI_FREE(target_desc->string.pointer); |
} |
|
target_desc->string.pointer = ACPI_ALLOCATE_ZEROED((acpi_size) |
length + 1); |
if (!target_desc->string.pointer) { |
return_ACPI_STATUS(AE_NO_MEMORY); |
} |
|
target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER; |
memcpy(target_desc->string.pointer, buffer, length); |
} |
|
/* Set the new target length */ |
|
target_desc->string.length = length; |
return_ACPI_STATUS(AE_OK); |
} |