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312 lines
9.3 KiB
C
312 lines
9.3 KiB
C
/******************************************************************************
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*
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* Module Name: exoparg3 - AML execution - opcodes with 3 arguments
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2022, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acinterp.h"
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#include "acparser.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exoparg3")
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/*!
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* Naming convention for AML interpreter execution routines.
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*
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* The routines that begin execution of AML opcodes are named with a common
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* convention based upon the number of arguments, the number of target operands,
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* and whether or not a value is returned:
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*
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* AcpiExOpcode_xA_yT_zR
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*
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* Where:
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*
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* xA - ARGUMENTS: The number of arguments (input operands) that are
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* required for this opcode type (1 through 6 args).
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* yT - TARGETS: The number of targets (output operands) that are required
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* for this opcode type (0, 1, or 2 targets).
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* zR - RETURN VALUE: Indicates whether this opcode type returns a value
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* as the function return (0 or 1).
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*
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* The AcpiExOpcode* functions are called via the Dispatcher component with
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* fully resolved operands.
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!*/
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/*******************************************************************************
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*
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* FUNCTION: AcpiExOpcode_3A_0T_0R
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*
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* PARAMETERS: WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute Triadic operator (3 operands)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExOpcode_3A_0T_0R (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
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ACPI_SIGNAL_FATAL_INFO *Fatal;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
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AcpiPsGetOpcodeName (WalkState->Opcode));
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switch (WalkState->Opcode)
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{
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case AML_FATAL_OP: /* Fatal (FatalType FatalCode FatalArg) */
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"FatalOp: Type %X Code %X Arg %X "
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"<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
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(UINT32) Operand[0]->Integer.Value,
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(UINT32) Operand[1]->Integer.Value,
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(UINT32) Operand[2]->Integer.Value));
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Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
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if (Fatal)
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{
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Fatal->Type = (UINT32) Operand[0]->Integer.Value;
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Fatal->Code = (UINT32) Operand[1]->Integer.Value;
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Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
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}
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/* Always signal the OS! */
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Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
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/* Might return while OS is shutting down, just continue */
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ACPI_FREE (Fatal);
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goto Cleanup;
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case AML_EXTERNAL_OP:
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/*
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* If the interpreter sees this opcode, just ignore it. The External
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* op is intended for use by disassemblers in order to properly
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* disassemble control method invocations. The opcode or group of
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* opcodes should be surrounded by an "if (0)" clause to ensure that
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* AML interpreters never see the opcode. Thus, something is
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* wrong if an external opcode ever gets here.
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*/
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ACPI_ERROR ((AE_INFO, "Executed External Op"));
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Status = AE_OK;
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goto Cleanup;
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default:
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ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
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WalkState->Opcode));
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Status = AE_AML_BAD_OPCODE;
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goto Cleanup;
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}
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Cleanup:
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExOpcode_3A_1T_1R
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*
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* PARAMETERS: WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute Triadic operator (3 operands)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExOpcode_3A_1T_1R (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
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ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
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char *Buffer = NULL;
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ACPI_STATUS Status = AE_OK;
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UINT64 Index;
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ACPI_SIZE Length;
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ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
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AcpiPsGetOpcodeName (WalkState->Opcode));
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switch (WalkState->Opcode)
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{
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case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
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/*
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* Create the return object. The Source operand is guaranteed to be
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* either a String or a Buffer, so just use its type.
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*/
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ReturnDesc = AcpiUtCreateInternalObject (
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(Operand[0])->Common.Type);
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if (!ReturnDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/* Get the Integer values from the objects */
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Index = Operand[1]->Integer.Value;
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Length = (ACPI_SIZE) Operand[2]->Integer.Value;
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/*
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* If the index is beyond the length of the String/Buffer, or if the
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* requested length is zero, return a zero-length String/Buffer
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*/
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if (Index >= Operand[0]->String.Length)
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{
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Length = 0;
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}
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/* Truncate request if larger than the actual String/Buffer */
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else if ((Index + Length) > Operand[0]->String.Length)
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{
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Length =
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(ACPI_SIZE) Operand[0]->String.Length - (ACPI_SIZE) Index;
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}
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/* Strings always have a sub-pointer, not so for buffers */
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switch ((Operand[0])->Common.Type)
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{
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case ACPI_TYPE_STRING:
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/* Always allocate a new buffer for the String */
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Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
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if (!Buffer)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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break;
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case ACPI_TYPE_BUFFER:
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/* If the requested length is zero, don't allocate a buffer */
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if (Length > 0)
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{
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/* Allocate a new buffer for the Buffer */
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Buffer = ACPI_ALLOCATE_ZEROED (Length);
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if (!Buffer)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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}
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break;
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default: /* Should not happen */
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Status = AE_AML_OPERAND_TYPE;
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goto Cleanup;
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}
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if (Buffer)
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{
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/* We have a buffer, copy the portion requested */
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memcpy (Buffer,
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Operand[0]->String.Pointer + Index, Length);
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}
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/* Set the length of the new String/Buffer */
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ReturnDesc->String.Pointer = Buffer;
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ReturnDesc->String.Length = (UINT32) Length;
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/* Mark buffer initialized */
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ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
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WalkState->Opcode));
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Status = AE_AML_BAD_OPCODE;
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goto Cleanup;
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}
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/* Store the result in the target */
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Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
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Cleanup:
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/* Delete return object on error */
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if (ACPI_FAILURE (Status) || WalkState->ResultObj)
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{
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AcpiUtRemoveReference (ReturnDesc);
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WalkState->ResultObj = NULL;
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}
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else
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{
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/* Set the return object and exit */
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WalkState->ResultObj = ReturnDesc;
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}
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return_ACPI_STATUS (Status);
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}
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