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 /******************************************************************************
  *
  * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2024, 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.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * 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.
  *
  * 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 MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * 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 DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acinterp.h"
 #include "acparser.h"
 #include "amlcode.h"
 
 
 #define _COMPONENT          ACPI_EXECUTER
         ACPI_MODULE_NAME    ("exoparg3")
 
 
 /*!
  * Naming convention for AML interpreter execution routines.
  *
  * The routines that begin execution of AML opcodes are named with a common
  * convention based upon the number of arguments, the number of target operands,
  * and whether or not a value is returned:
  *
  *      AcpiExOpcode_xA_yT_zR
  *
  * Where:
  *
  * xA - ARGUMENTS:    The number of arguments (input operands) that are
  *                    required for this opcode type (1 through 6 args).
  * yT - TARGETS:      The number of targets (output operands) that are required
  *                    for this opcode type (0, 1, or 2 targets).
  * zR - RETURN VALUE: Indicates whether this opcode type returns a value
  *                    as the function return (0 or 1).
  *
  * The AcpiExOpcode* functions are called via the Dispatcher component with
  * fully resolved operands.
 !*/
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExOpcode_3A_0T_0R
  *
  * PARAMETERS:  WalkState           - Current walk state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Execute Triadic operator (3 operands)
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExOpcode_3A_0T_0R (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_SIGNAL_FATAL_INFO  *Fatal;
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
         AcpiPsGetOpcodeName (WalkState->Opcode));
 
 
     switch (WalkState->Opcode)
     {
     case AML_FATAL_OP:          /* Fatal (FatalType  FatalCode  FatalArg) */
 
         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
             "FatalOp: Type %X Code %X Arg %X "
             "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
             (UINT32) Operand[0]->Integer.Value,
             (UINT32) Operand[1]->Integer.Value,
             (UINT32) Operand[2]->Integer.Value));
 
         Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
         if (Fatal)
         {
             Fatal->Type = (UINT32) Operand[0]->Integer.Value;
             Fatal->Code = (UINT32) Operand[1]->Integer.Value;
             Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
         }
 
         /* Always signal the OS! */
 
         Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
 
         /* Might return while OS is shutting down, just continue */
 
         ACPI_FREE (Fatal);
         goto Cleanup;
 
     case AML_EXTERNAL_OP:
         /*
          * If the interpreter sees this opcode, just ignore it. The External
          * op is intended for use by disassemblers in order to properly
          * disassemble control method invocations. The opcode or group of
          * opcodes should be surrounded by an "if (0)" clause to ensure that
          * AML interpreters never see the opcode. Thus, something is
          * wrong if an external opcode ever gets here.
          */
         ACPI_ERROR ((AE_INFO, "Executed External Op"));
         Status = AE_OK;
         goto Cleanup;
 
     default:
 
         ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
             WalkState->Opcode));
 
         Status = AE_AML_BAD_OPCODE;
         goto Cleanup;
     }
 
 
 Cleanup:
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExOpcode_3A_1T_1R
  *
  * PARAMETERS:  WalkState           - Current walk state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Execute Triadic operator (3 operands)
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExOpcode_3A_1T_1R (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;
     char                    *Buffer = NULL;
     ACPI_STATUS             Status = AE_OK;
     UINT64                  Index;
     ACPI_SIZE               Length;
 
 
     ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
         AcpiPsGetOpcodeName (WalkState->Opcode));
 
 
     switch (WalkState->Opcode)
     {
     case AML_MID_OP:    /* Mid (Source[0], Index[1], Length[2], Result[3]) */
         /*
          * Create the return object. The Source operand is guaranteed to be
          * either a String or a Buffer, so just use its type.
          */
         ReturnDesc = AcpiUtCreateInternalObject (
             (Operand[0])->Common.Type);
         if (!ReturnDesc)
         {
             Status = AE_NO_MEMORY;
             goto Cleanup;
         }
 
         /* Get the Integer values from the objects */
 
         Index = Operand[1]->Integer.Value;
         Length = (ACPI_SIZE) Operand[2]->Integer.Value;
 
         /*
          * If the index is beyond the length of the String/Buffer, or if the
          * requested length is zero, return a zero-length String/Buffer
          */
         if (Index >= Operand[0]->String.Length)
         {
             Length = 0;
         }
 
         /* Truncate request if larger than the actual String/Buffer */
 
         else if ((Index + Length) > Operand[0]->String.Length)
         {
             Length =
                 (ACPI_SIZE) Operand[0]->String.Length - (ACPI_SIZE) Index;
         }
 
         /* Strings always have a sub-pointer, not so for buffers */
 
         switch ((Operand[0])->Common.Type)
         {
         case ACPI_TYPE_STRING:
 
             /* Always allocate a new buffer for the String */
 
             Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
             if (!Buffer)
             {
                 Status = AE_NO_MEMORY;
                 goto Cleanup;
             }
             break;
 
         case ACPI_TYPE_BUFFER:
 
             /* If the requested length is zero, don't allocate a buffer */
 
             if (Length > 0)
             {
                 /* Allocate a new buffer for the Buffer */
 
                 Buffer = ACPI_ALLOCATE_ZEROED (Length);
                 if (!Buffer)
                 {
                     Status = AE_NO_MEMORY;
                     goto Cleanup;
                 }
             }
             break;
 
         default:                        /* Should not happen */
 
             Status = AE_AML_OPERAND_TYPE;
             goto Cleanup;
         }
 
         if (Buffer)
         {
             /* We have a buffer, copy the portion requested */
 
             memcpy (Buffer,
                 Operand[0]->String.Pointer + Index, Length);
         }
 
         /* Set the length of the new String/Buffer */
 
         ReturnDesc->String.Pointer = Buffer;
         ReturnDesc->String.Length = (UINT32) Length;
 
         /* Mark buffer initialized */
 
         ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
         break;
 
     default:
 
         ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
             WalkState->Opcode));
 
         Status = AE_AML_BAD_OPCODE;
         goto Cleanup;
     }
 
     /* Store the result in the target */
 
     Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
 
 Cleanup:
 
     /* Delete return object on error */
 
     if (ACPI_FAILURE (Status) || WalkState->ResultObj)
     {
         AcpiUtRemoveReference (ReturnDesc);
         WalkState->ResultObj = NULL;
     }
     else
     {
         /* Set the return object and exit */
 
         WalkState->ResultObj = ReturnDesc;
     }
 
     return_ACPI_STATUS (Status);
 }

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