diff options
Diffstat (limited to 'Private/acpiSDK/source/components/parser/psparse.c')
| -rw-r--r-- | Private/acpiSDK/source/components/parser/psparse.c | 843 |
1 files changed, 0 insertions, 843 deletions
diff --git a/Private/acpiSDK/source/components/parser/psparse.c b/Private/acpiSDK/source/components/parser/psparse.c deleted file mode 100644 index f7e584b9..00000000 --- a/Private/acpiSDK/source/components/parser/psparse.c +++ /dev/null @@ -1,843 +0,0 @@ -/****************************************************************************** - * - * Module Name: psparse - Parser top level AML parse routines - * - *****************************************************************************/ - -/****************************************************************************** - * - * 1. Copyright Notice - * - * Some or all of this work - Copyright (c) 1999 - 2023, 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. - * - *****************************************************************************/ - -/* - * Parse the AML and build an operation tree as most interpreters, - * like Perl, do. Parsing is done by hand rather than with a YACC - * generated parser to tightly constrain stack and dynamic memory - * usage. At the same time, parsing is kept flexible and the code - * fairly compact by parsing based on a list of AML opcode - * templates in AmlOpInfo[] - */ - -#include "acpi.h" -#include "accommon.h" -#include "acparser.h" -#include "acdispat.h" -#include "amlcode.h" -#include "acinterp.h" -#include "acnamesp.h" - -#define _COMPONENT ACPI_PARSER - ACPI_MODULE_NAME ("psparse") - - -/******************************************************************************* - * - * FUNCTION: AcpiPsGetOpcodeSize - * - * PARAMETERS: Opcode - An AML opcode - * - * RETURN: Size of the opcode, in bytes (1 or 2) - * - * DESCRIPTION: Get the size of the current opcode. - * - ******************************************************************************/ - -UINT32 -AcpiPsGetOpcodeSize ( - UINT32 Opcode) -{ - - /* Extended (2-byte) opcode if > 255 */ - - if (Opcode > 0x00FF) - { - return (2); - } - - /* Otherwise, just a single byte opcode */ - - return (1); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiPsPeekOpcode - * - * PARAMETERS: ParserState - A parser state object - * - * RETURN: Next AML opcode - * - * DESCRIPTION: Get next AML opcode (without incrementing AML pointer) - * - ******************************************************************************/ - -UINT16 -AcpiPsPeekOpcode ( - ACPI_PARSE_STATE *ParserState) -{ - UINT8 *Aml; - UINT16 Opcode; - - - Aml = ParserState->Aml; - Opcode = (UINT16) ACPI_GET8 (Aml); - - if (Opcode == AML_EXTENDED_PREFIX) - { - /* Extended opcode, get the second opcode byte */ - - Aml++; - Opcode = (UINT16) ((Opcode << 8) | ACPI_GET8 (Aml)); - } - - return (Opcode); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiPsCompleteThisOp - * - * PARAMETERS: WalkState - Current State - * Op - Op to complete - * - * RETURN: Status - * - * DESCRIPTION: Perform any cleanup at the completion of an Op. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiPsCompleteThisOp ( - ACPI_WALK_STATE *WalkState, - ACPI_PARSE_OBJECT *Op) -{ - ACPI_PARSE_OBJECT *Prev; - ACPI_PARSE_OBJECT *Next; - const ACPI_OPCODE_INFO *ParentInfo; - ACPI_PARSE_OBJECT *ReplacementOp = NULL; - ACPI_STATUS Status = AE_OK; - - - ACPI_FUNCTION_TRACE_PTR (PsCompleteThisOp, Op); - - - /* Check for null Op, can happen if AML code is corrupt */ - - if (!Op) - { - return_ACPI_STATUS (AE_OK); /* OK for now */ - } - - AcpiExStopTraceOpcode (Op, WalkState); - - /* Delete this op and the subtree below it if asked to */ - - if (((WalkState->ParseFlags & ACPI_PARSE_TREE_MASK) != ACPI_PARSE_DELETE_TREE) || - (WalkState->OpInfo->Class == AML_CLASS_ARGUMENT)) - { - return_ACPI_STATUS (AE_OK); - } - - /* Make sure that we only delete this subtree */ - - if (Op->Common.Parent) - { - Prev = Op->Common.Parent->Common.Value.Arg; - if (!Prev) - { - /* Nothing more to do */ - - goto Cleanup; - } - - /* - * Check if we need to replace the operator and its subtree - * with a return value op (placeholder op) - */ - ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode); - - switch (ParentInfo->Class) - { - case AML_CLASS_CONTROL: - - break; - - case AML_CLASS_CREATE: - /* - * These opcodes contain TermArg operands. The current - * op must be replaced by a placeholder return op - */ - ReplacementOp = AcpiPsAllocOp ( - AML_INT_RETURN_VALUE_OP, Op->Common.Aml); - if (!ReplacementOp) - { - Status = AE_NO_MEMORY; - } - break; - - case AML_CLASS_NAMED_OBJECT: - /* - * These opcodes contain TermArg operands. The current - * op must be replaced by a placeholder return op - */ - if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) || - (Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) || - (Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) || - (Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || - (Op->Common.Parent->Common.AmlOpcode == AML_BANK_FIELD_OP) || - (Op->Common.Parent->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP)) - { - ReplacementOp = AcpiPsAllocOp ( - AML_INT_RETURN_VALUE_OP, Op->Common.Aml); - if (!ReplacementOp) - { - Status = AE_NO_MEMORY; - } - } - else if ((Op->Common.Parent->Common.AmlOpcode == AML_NAME_OP) && - (WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2)) - { - if ((Op->Common.AmlOpcode == AML_BUFFER_OP) || - (Op->Common.AmlOpcode == AML_PACKAGE_OP) || - (Op->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP)) - { - ReplacementOp = AcpiPsAllocOp (Op->Common.AmlOpcode, - Op->Common.Aml); - if (!ReplacementOp) - { - Status = AE_NO_MEMORY; - } - else - { - ReplacementOp->Named.Data = Op->Named.Data; - ReplacementOp->Named.Length = Op->Named.Length; - } - } - } - break; - - default: - - ReplacementOp = AcpiPsAllocOp ( - AML_INT_RETURN_VALUE_OP, Op->Common.Aml); - if (!ReplacementOp) - { - Status = AE_NO_MEMORY; - } - } - - /* We must unlink this op from the parent tree */ - - if (Prev == Op) - { - /* This op is the first in the list */ - - if (ReplacementOp) - { - ReplacementOp->Common.Parent = Op->Common.Parent; - ReplacementOp->Common.Value.Arg = NULL; - ReplacementOp->Common.Node = Op->Common.Node; - Op->Common.Parent->Common.Value.Arg = ReplacementOp; - ReplacementOp->Common.Next = Op->Common.Next; - } - else - { - Op->Common.Parent->Common.Value.Arg = Op->Common.Next; - } - } - - /* Search the parent list */ - - else while (Prev) - { - /* Traverse all siblings in the parent's argument list */ - - Next = Prev->Common.Next; - if (Next == Op) - { - if (ReplacementOp) - { - ReplacementOp->Common.Parent = Op->Common.Parent; - ReplacementOp->Common.Value.Arg = NULL; - ReplacementOp->Common.Node = Op->Common.Node; - Prev->Common.Next = ReplacementOp; - ReplacementOp->Common.Next = Op->Common.Next; - Next = NULL; - } - else - { - Prev->Common.Next = Op->Common.Next; - Next = NULL; - } - } - Prev = Next; - } - } - - -Cleanup: - - /* Now we can actually delete the subtree rooted at Op */ - - AcpiPsDeleteParseTree (Op); - return_ACPI_STATUS (Status); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiPsNextParseState - * - * PARAMETERS: WalkState - Current state - * Op - Current parse op - * CallbackStatus - Status from previous operation - * - * RETURN: Status - * - * DESCRIPTION: Update the parser state based upon the return exception from - * the parser callback. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiPsNextParseState ( - ACPI_WALK_STATE *WalkState, - ACPI_PARSE_OBJECT *Op, - ACPI_STATUS CallbackStatus) -{ - ACPI_PARSE_STATE *ParserState = &WalkState->ParserState; - ACPI_STATUS Status = AE_CTRL_PENDING; - - - ACPI_FUNCTION_TRACE_PTR (PsNextParseState, Op); - - - switch (CallbackStatus) - { - case AE_CTRL_TERMINATE: - /* - * A control method was terminated via a RETURN statement. - * The walk of this method is complete. - */ - ParserState->Aml = ParserState->AmlEnd; - Status = AE_CTRL_TERMINATE; - break; - - case AE_CTRL_BREAK: - - ParserState->Aml = WalkState->AmlLastWhile; - WalkState->ControlState->Common.Value = FALSE; - Status = AE_CTRL_BREAK; - break; - - case AE_CTRL_CONTINUE: - - ParserState->Aml = WalkState->AmlLastWhile; - Status = AE_CTRL_CONTINUE; - break; - - case AE_CTRL_PENDING: - - ParserState->Aml = WalkState->AmlLastWhile; - break; - -#if 0 - case AE_CTRL_SKIP: - - ParserState->Aml = ParserState->Scope->ParseScope.PkgEnd; - Status = AE_OK; - break; -#endif - - case AE_CTRL_TRUE: - /* - * Predicate of an IF was true, and we are at the matching ELSE. - * Just close out this package - */ - ParserState->Aml = AcpiPsGetNextPackageEnd (ParserState); - Status = AE_CTRL_PENDING; - break; - - case AE_CTRL_FALSE: - /* - * Either an IF/WHILE Predicate was false or we encountered a BREAK - * opcode. In both cases, we do not execute the rest of the - * package; We simply close out the parent (finishing the walk of - * this branch of the tree) and continue execution at the parent - * level. - */ - ParserState->Aml = ParserState->Scope->ParseScope.PkgEnd; - - /* In the case of a BREAK, just force a predicate (if any) to FALSE */ - - WalkState->ControlState->Common.Value = FALSE; - Status = AE_CTRL_END; - break; - - case AE_CTRL_TRANSFER: - - /* A method call (invocation) -- transfer control */ - - Status = AE_CTRL_TRANSFER; - WalkState->PrevOp = Op; - WalkState->MethodCallOp = Op; - WalkState->MethodCallNode = (Op->Common.Value.Arg)->Common.Node; - - /* Will return value (if any) be used by the caller? */ - - WalkState->ReturnUsed = AcpiDsIsResultUsed (Op, WalkState); - break; - - default: - - Status = CallbackStatus; - if (ACPI_CNTL_EXCEPTION (CallbackStatus)) - { - Status = AE_OK; - } - break; - } - - return_ACPI_STATUS (Status); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiPsParseAml - * - * PARAMETERS: WalkState - Current state - * - * - * RETURN: Status - * - * DESCRIPTION: Parse raw AML and return a tree of ops - * - ******************************************************************************/ - -ACPI_STATUS -AcpiPsParseAml ( - ACPI_WALK_STATE *WalkState) -{ - ACPI_STATUS Status; - ACPI_THREAD_STATE *Thread; - ACPI_THREAD_STATE *PrevWalkList = AcpiGbl_CurrentWalkList; - ACPI_WALK_STATE *PreviousWalkState; - - - ACPI_FUNCTION_TRACE (PsParseAml); - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Entered with WalkState=%p Aml=%p size=%X\n", - WalkState, WalkState->ParserState.Aml, - WalkState->ParserState.AmlSize)); - - if (!WalkState->ParserState.Aml) - { - return_ACPI_STATUS (AE_BAD_ADDRESS); - } - - /* Create and initialize a new thread state */ - - Thread = AcpiUtCreateThreadState (); - if (!Thread) - { - if (WalkState->MethodDesc) - { - /* Executing a control method - additional cleanup */ - - AcpiDsTerminateControlMethod (WalkState->MethodDesc, WalkState); - } - - AcpiDsDeleteWalkState (WalkState); - return_ACPI_STATUS (AE_NO_MEMORY); - } - - WalkState->Thread = Thread; - - /* - * If executing a method, the starting SyncLevel is this method's - * SyncLevel - */ - if (WalkState->MethodDesc) - { - WalkState->Thread->CurrentSyncLevel = - WalkState->MethodDesc->Method.SyncLevel; - } - - AcpiDsPushWalkState (WalkState, Thread); - - /* - * This global allows the AML debugger to get a handle to the currently - * executing control method. - */ - AcpiGbl_CurrentWalkList = Thread; - - /* - * Execute the walk loop as long as there is a valid Walk State. This - * handles nested control method invocations without recursion. - */ - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "State=%p\n", WalkState)); - - Status = AE_OK; - while (WalkState) - { - if (ACPI_SUCCESS (Status)) - { - /* - * The ParseLoop executes AML until the method terminates - * or calls another method. - */ - Status = AcpiPsParseLoop (WalkState); - } - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Completed one call to walk loop, %s State=%p\n", - AcpiFormatException (Status), WalkState)); - - if (WalkState->MethodPathname && WalkState->MethodIsNested) - { - /* Optional object evaluation log */ - - ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EVALUATION, "%-26s: %*s%s\n", - " Exit nested method", - (WalkState->MethodNestingDepth + 1) * 3, " ", - &WalkState->MethodPathname[1])); - - ACPI_FREE (WalkState->MethodPathname); - WalkState->MethodIsNested = FALSE; - } - if (Status == AE_CTRL_TRANSFER) - { - /* - * A method call was detected. - * Transfer control to the called control method - */ - Status = AcpiDsCallControlMethod (Thread, WalkState, NULL); - if (ACPI_FAILURE (Status)) - { - Status = AcpiDsMethodError (Status, WalkState); - } - - /* - * If the transfer to the new method method call worked, - * a new walk state was created -- get it - */ - WalkState = AcpiDsGetCurrentWalkState (Thread); - continue; - } - else if (Status == AE_CTRL_TERMINATE) - { - Status = AE_OK; - } - else if ((Status != AE_OK) && (WalkState->MethodDesc)) - { - /* Either the method parse or actual execution failed */ - - AcpiExExitInterpreter (); - if (Status == AE_ABORT_METHOD) - { - AcpiNsPrintNodePathname ( - WalkState->MethodNode, "Aborting method"); - AcpiOsPrintf ("\n"); - } - else - { - ACPI_ERROR_METHOD ("Aborting method", - WalkState->MethodNode, NULL, Status); - } - AcpiExEnterInterpreter (); - - /* Check for possible multi-thread reentrancy problem */ - - if ((Status == AE_ALREADY_EXISTS) && - (!(WalkState->MethodDesc->Method.InfoFlags & - ACPI_METHOD_SERIALIZED))) - { - /* - * Method is not serialized and tried to create an object - * twice. The probable cause is that the method cannot - * handle reentrancy. Mark as "pending serialized" now, and - * then mark "serialized" when the last thread exits. - */ - WalkState->MethodDesc->Method.InfoFlags |= - ACPI_METHOD_SERIALIZED_PENDING; - } - } - - /* We are done with this walk, move on to the parent if any */ - - WalkState = AcpiDsPopWalkState (Thread); - - /* Reset the current scope to the beginning of scope stack */ - - AcpiDsScopeStackClear (WalkState); - - /* - * If we just returned from the execution of a control method or if we - * encountered an error during the method parse phase, there's lots of - * cleanup to do - */ - if (((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) == - ACPI_PARSE_EXECUTE && - !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) || - (ACPI_FAILURE (Status))) - { - AcpiDsTerminateControlMethod (WalkState->MethodDesc, WalkState); - } - - /* Delete this walk state and all linked control states */ - - AcpiPsCleanupScope (&WalkState->ParserState); - PreviousWalkState = WalkState; - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "ReturnValue=%p, ImplicitValue=%p State=%p\n", - WalkState->ReturnDesc, WalkState->ImplicitReturnObj, WalkState)); - - /* Check if we have restarted a preempted walk */ - - WalkState = AcpiDsGetCurrentWalkState (Thread); - if (WalkState) - { - if (ACPI_SUCCESS (Status)) - { - /* - * There is another walk state, restart it. - * If the method return value is not used by the parent, - * The object is deleted - */ - if (!PreviousWalkState->ReturnDesc) - { - /* - * In slack mode execution, if there is no return value - * we should implicitly return zero (0) as a default value. - */ - if (AcpiGbl_EnableInterpreterSlack && - !PreviousWalkState->ImplicitReturnObj) - { - PreviousWalkState->ImplicitReturnObj = - AcpiUtCreateIntegerObject ((UINT64) 0); - if (!PreviousWalkState->ImplicitReturnObj) - { - return_ACPI_STATUS (AE_NO_MEMORY); - } - } - - /* Restart the calling control method */ - - Status = AcpiDsRestartControlMethod (WalkState, - PreviousWalkState->ImplicitReturnObj); - } - else - { - /* - * We have a valid return value, delete any implicit - * return value. - */ - AcpiDsClearImplicitReturn (PreviousWalkState); - - Status = AcpiDsRestartControlMethod (WalkState, - PreviousWalkState->ReturnDesc); - } - if (ACPI_SUCCESS (Status)) - { - WalkState->WalkType |= ACPI_WALK_METHOD_RESTART; - } - } - else - { - /* On error, delete any return object or implicit return */ - - AcpiUtRemoveReference (PreviousWalkState->ReturnDesc); - AcpiDsClearImplicitReturn (PreviousWalkState); - } - } - - /* - * Just completed a 1st-level method, save the final internal return - * value (if any) - */ - else if (PreviousWalkState->CallerReturnDesc) - { - if (PreviousWalkState->ImplicitReturnObj) - { - *(PreviousWalkState->CallerReturnDesc) = - PreviousWalkState->ImplicitReturnObj; - } - else - { - /* NULL if no return value */ - - *(PreviousWalkState->CallerReturnDesc) = - PreviousWalkState->ReturnDesc; - } - } - else - { - if (PreviousWalkState->ReturnDesc) - { - /* Caller doesn't want it, must delete it */ - - AcpiUtRemoveReference (PreviousWalkState->ReturnDesc); - } - if (PreviousWalkState->ImplicitReturnObj) - { - /* Caller doesn't want it, must delete it */ - - AcpiUtRemoveReference (PreviousWalkState->ImplicitReturnObj); - } - } - - AcpiDsDeleteWalkState (PreviousWalkState); - } - - /* Normal exit */ - - AcpiExReleaseAllMutexes (Thread); - AcpiUtDeleteGenericState (ACPI_CAST_PTR (ACPI_GENERIC_STATE, Thread)); - AcpiGbl_CurrentWalkList = PrevWalkList; - return_ACPI_STATUS (Status); -} |