/****************************************************************************** * * Module Name: asllength - Tree walk to determine package and opcode lengths * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2022, 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 #include "aslcompiler.y.h" #include #include #define _COMPONENT ACPI_COMPILER ACPI_MODULE_NAME ("asllength") /* Local prototypes */ static UINT8 CgGetPackageLenByteCount ( ACPI_PARSE_OBJECT *Op, UINT32 PackageLength); static void CgGenerateAmlOpcodeLength ( ACPI_PARSE_OBJECT *Op); #ifdef ACPI_OBSOLETE_FUNCTIONS void LnAdjustLengthToRoot ( ACPI_PARSE_OBJECT *Op, UINT32 LengthDelta); #endif /******************************************************************************* * * FUNCTION: LnInitLengthsWalk * * PARAMETERS: ASL_WALK_CALLBACK * * RETURN: Status * * DESCRIPTION: Walk callback to initialize (and re-initialize) the node * subtree length(s) to zero. The Subtree lengths are bubbled * up to the root node in order to get a total AML length. * ******************************************************************************/ ACPI_STATUS LnInitLengthsWalk ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { Op->Asl.AmlSubtreeLength = 0; return (AE_OK); } /******************************************************************************* * * FUNCTION: LnPackageLengthWalk * * PARAMETERS: ASL_WALK_CALLBACK * * RETURN: Status * * DESCRIPTION: Walk callback to calculate the total AML length. * 1) Calculate the AML lengths (opcode, package length, etc.) for * THIS node. * 2) Bubbble up all of these lengths to the parent node by summing * them all into the parent subtree length. * * Note: The SubtreeLength represents the total AML length of all child nodes * in all subtrees under a given node. Therefore, once this walk is * complete, the Root Node subtree length is the AML length of the entire * tree (and thus, the entire ACPI table) * ******************************************************************************/ ACPI_STATUS LnPackageLengthWalk ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { /* Generate the AML lengths for this node */ CgGenerateAmlLengths (Op); /* Bubble up all lengths (this node and all below it) to the parent */ if ((Op->Asl.Parent) && (Op->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)) { Op->Asl.Parent->Asl.AmlSubtreeLength += ( Op->Asl.AmlLength + Op->Asl.AmlOpcodeLength + Op->Asl.AmlPkgLenBytes + Op->Asl.AmlSubtreeLength + CvCalculateCommentLengths (Op) ); } return (AE_OK); } /******************************************************************************* * * FUNCTION: CgGetPackageLenByteCount * * PARAMETERS: Op - Parse node * PackageLength - Length to be encoded * * RETURN: Required length of the package length encoding * * DESCRIPTION: Calculate the number of bytes required to encode the given * package length. * ******************************************************************************/ static UINT8 CgGetPackageLenByteCount ( ACPI_PARSE_OBJECT *Op, UINT32 PackageLength) { /* * Determine the number of bytes required to encode the package length * Note: the package length includes the number of bytes used to encode * the package length, so we must account for this also. */ if (PackageLength <= (0x0000003F - 1)) { return (1); } else if (PackageLength <= (0x00000FFF - 2)) { return (2); } else if (PackageLength <= (0x000FFFFF - 3)) { return (3); } else if (PackageLength <= (0x0FFFFFFF - 4)) { return (4); } else { /* Fatal error - the package length is too large to encode */ AslError (ASL_ERROR, ASL_MSG_ENCODING_LENGTH, Op, NULL); } return (0); } /******************************************************************************* * * FUNCTION: CgGenerateAmlOpcodeLength * * PARAMETERS: Op - Parse node whose AML opcode lengths will be * calculated * * RETURN: None. * * DESCRIPTION: Calculate the AmlOpcodeLength, AmlPkgLenBytes, and AmlLength * fields for this node. * ******************************************************************************/ static void CgGenerateAmlOpcodeLength ( ACPI_PARSE_OBJECT *Op) { /* Check for two-byte opcode */ if (Op->Asl.AmlOpcode > 0x00FF) { Op->Asl.AmlOpcodeLength = 2; } else { Op->Asl.AmlOpcodeLength = 1; } /* Does this opcode have an associated "PackageLength" field? */ Op->Asl.AmlPkgLenBytes = 0; if (Op->Asl.CompileFlags & OP_AML_PACKAGE) { Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount ( Op, Op->Asl.AmlSubtreeLength); } /* Data opcode lengths are easy */ switch (Op->Asl.AmlOpcode) { case AML_BYTE_OP: Op->Asl.AmlLength = 1; break; case AML_WORD_OP: Op->Asl.AmlLength = 2; break; case AML_DWORD_OP: Op->Asl.AmlLength = 4; break; case AML_QWORD_OP: Op->Asl.AmlLength = 8; break; default: /* All data opcodes must be above */ break; } } /******************************************************************************* * * FUNCTION: CgGenerateAmlLengths * * PARAMETERS: Op - Parse node * * RETURN: None. * * DESCRIPTION: Generate internal length fields based on the AML opcode or * parse opcode. * ******************************************************************************/ void CgGenerateAmlLengths ( ACPI_PARSE_OBJECT *Op) { char *Buffer; ACPI_STATUS Status; switch (Op->Asl.AmlOpcode) { case AML_RAW_DATA_BYTE: Op->Asl.AmlOpcodeLength = 0; Op->Asl.AmlLength = 1; return; case AML_RAW_DATA_WORD: Op->Asl.AmlOpcodeLength = 0; Op->Asl.AmlLength = 2; return; case AML_RAW_DATA_DWORD: Op->Asl.AmlOpcodeLength = 0; Op->Asl.AmlLength = 4; return; case AML_RAW_DATA_QWORD: Op->Asl.AmlOpcodeLength = 0; Op->Asl.AmlLength = 8; return; case AML_RAW_DATA_BUFFER: /* Aml length is/was set by creator */ Op->Asl.AmlOpcodeLength = 0; return; case AML_RAW_DATA_CHAIN: /* Aml length is/was set by creator */ Op->Asl.AmlOpcodeLength = 0; return; default: break; } switch (Op->Asl.ParseOpcode) { case PARSEOP_DEFINITION_BLOCK: AslGbl_TableLength = sizeof (ACPI_TABLE_HEADER) + Op->Asl.AmlSubtreeLength; break; case PARSEOP_NAMESEG: Op->Asl.AmlOpcodeLength = 0; Op->Asl.AmlLength = 4; Op->Asl.ExternalName = Op->Asl.Value.String; break; case PARSEOP_NAMESTRING: case PARSEOP_METHODCALL: if (Op->Asl.CompileFlags & OP_NAME_INTERNALIZED) { break; } Op->Asl.AmlOpcodeLength = 0; Status = UtInternalizeName (Op->Asl.Value.String, &Buffer); if (ACPI_FAILURE (Status)) { DbgPrint (ASL_DEBUG_OUTPUT, "Failure from internalize name %X\n", Status); break; } Op->Asl.ExternalName = Op->Asl.Value.String; Op->Asl.Value.String = Buffer; Op->Asl.CompileFlags |= OP_NAME_INTERNALIZED; Op->Asl.AmlLength = strlen (Buffer); /* * Check for single backslash reference to root or reference to a name * consisting of only prefix (^) characters. Make it a null terminated * string in the AML. */ if (Op->Asl.AmlLength == 1 || UtNameContainsAllPrefix(Op)) { Op->Asl.AmlLength++; } break; case PARSEOP_STRING_LITERAL: Op->Asl.AmlOpcodeLength = 1; /* Get null terminator */ Op->Asl.AmlLength = strlen (Op->Asl.Value.String) + 1; break; case PARSEOP_PACKAGE_LENGTH: Op->Asl.AmlOpcodeLength = 0; Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (Op, (UINT32) Op->Asl.Value.Integer); break; case PARSEOP_RAW_DATA: Op->Asl.AmlOpcodeLength = 0; break; case PARSEOP_DEFAULT_ARG: case PARSEOP_INCLUDE: case PARSEOP_INCLUDE_END: /* Ignore the "default arg" nodes, they are extraneous at this point */ break; case PARSEOP_EXTERNAL: CgGenerateAmlOpcodeLength (Op); break; default: CgGenerateAmlOpcodeLength (Op); break; } } #ifdef ACPI_OBSOLETE_FUNCTIONS /******************************************************************************* * * FUNCTION: LnAdjustLengthToRoot * * PARAMETERS: Op - Node whose Length was changed * * RETURN: None. * * DESCRIPTION: Change the Subtree length of the given node, and bubble the * change all the way up to the root node. This allows for * last second changes to a package length (for example, if the * package length encoding gets shorter or longer.) * ******************************************************************************/ void LnAdjustLengthToRoot ( ACPI_PARSE_OBJECT *SubtreeOp, UINT32 LengthDelta) { ACPI_PARSE_OBJECT *Op; /* Adjust all subtree lengths up to the root */ Op = SubtreeOp->Asl.Parent; while (Op) { Op->Asl.AmlSubtreeLength -= LengthDelta; Op = Op->Asl.Parent; } /* Adjust the global table length */ AslGbl_TableLength -= LengthDelta; } #endif