682 lines
20 KiB
C
682 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: psobject - Support for parse objects
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, 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 MERCHANTIBILITY 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 "acparser.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psobject")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiPsGetAmlOpcode (
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ACPI_WALK_STATE *WalkState);
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsGetAmlOpcode
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*
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* PARAMETERS: WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Extract the next AML opcode from the input stream.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiPsGetAmlOpcode (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_FUNCTION_TRACE_PTR (PsGetAmlOpcode, WalkState);
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WalkState->AmlOffset = (UINT32) ACPI_PTR_DIFF (WalkState->ParserState.Aml,
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WalkState->ParserState.AmlStart);
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WalkState->Opcode = AcpiPsPeekOpcode (&(WalkState->ParserState));
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/*
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* First cut to determine what we have found:
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* 1) A valid AML opcode
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* 2) A name string
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* 3) An unknown/invalid opcode
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*/
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WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode);
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switch (WalkState->OpInfo->Class)
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{
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case AML_CLASS_ASCII:
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case AML_CLASS_PREFIX:
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/*
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* Starts with a valid prefix or ASCII char, this is a name
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* string. Convert the bare name string to a namepath.
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*/
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WalkState->Opcode = AML_INT_NAMEPATH_OP;
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WalkState->ArgTypes = ARGP_NAMESTRING;
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break;
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case AML_CLASS_UNKNOWN:
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/* The opcode is unrecognized. Complain and skip unknown opcodes */
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if (WalkState->PassNumber == 2)
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{
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ACPI_ERROR ((AE_INFO,
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"Unknown opcode 0x%.2X at table offset 0x%.4X, ignoring",
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WalkState->Opcode,
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(UINT32) (WalkState->AmlOffset + sizeof (ACPI_TABLE_HEADER))));
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ACPI_DUMP_BUFFER ((WalkState->ParserState.Aml - 16), 48);
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#ifdef ACPI_ASL_COMPILER
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/*
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* This is executed for the disassembler only. Output goes
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* to the disassembled ASL output file.
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*/
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AcpiOsPrintf (
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"/*\nError: Unknown opcode 0x%.2X at table offset 0x%.4X, context:\n",
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WalkState->Opcode,
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(UINT32) (WalkState->AmlOffset + sizeof (ACPI_TABLE_HEADER)));
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/* Dump the context surrounding the invalid opcode */
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AcpiUtDumpBuffer (((UINT8 *) WalkState->ParserState.Aml - 16),
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48, DB_BYTE_DISPLAY,
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(WalkState->AmlOffset + sizeof (ACPI_TABLE_HEADER) - 16));
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AcpiOsPrintf (" */\n");
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#endif
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}
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/* Increment past one-byte or two-byte opcode */
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WalkState->ParserState.Aml++;
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if (WalkState->Opcode > 0xFF) /* Can only happen if first byte is 0x5B */
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{
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WalkState->ParserState.Aml++;
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}
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return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
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default:
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/* Found opcode info, this is a normal opcode */
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WalkState->ParserState.Aml += AcpiPsGetOpcodeSize (WalkState->Opcode);
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WalkState->ArgTypes = WalkState->OpInfo->ParseArgs;
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break;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsBuildNamedOp
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*
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* PARAMETERS: WalkState - Current state
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* AmlOpStart - Begin of named Op in AML
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* UnnamedOp - Early Op (not a named Op)
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* Op - Returned Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Parse a named Op
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiPsBuildNamedOp (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT *UnnamedOp,
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ACPI_PARSE_OBJECT **Op)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_PARSE_OBJECT *Arg = NULL;
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ACPI_FUNCTION_TRACE_PTR (PsBuildNamedOp, WalkState);
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UnnamedOp->Common.Value.Arg = NULL;
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UnnamedOp->Common.ArgListLength = 0;
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UnnamedOp->Common.AmlOpcode = WalkState->Opcode;
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/*
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* Get and append arguments until we find the node that contains
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* the name (the type ARGP_NAME).
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*/
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while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) &&
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(GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) != ARGP_NAME))
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{
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Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState),
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GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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AcpiPsAppendArg (UnnamedOp, Arg);
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INCREMENT_ARG_LIST (WalkState->ArgTypes);
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}
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/*
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* Make sure that we found a NAME and didn't run out of arguments
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*/
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if (!GET_CURRENT_ARG_TYPE (WalkState->ArgTypes))
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{
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/* We know that this arg is a name, move to next arg */
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INCREMENT_ARG_LIST (WalkState->ArgTypes);
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/*
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* Find the object. This will either insert the object into
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* the namespace or simply look it up
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*/
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WalkState->Op = NULL;
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Status = WalkState->DescendingCallback (WalkState, Op);
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if (ACPI_FAILURE (Status))
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{
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if (Status != AE_CTRL_TERMINATE)
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "During name lookup/catalog"));
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}
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return_ACPI_STATUS (Status);
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}
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if (!*Op)
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{
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return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
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}
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Status = AcpiPsNextParseState (WalkState, *Op, Status);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_CTRL_PENDING)
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{
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Status = AE_CTRL_PARSE_PENDING;
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}
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return_ACPI_STATUS (Status);
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}
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AcpiPsAppendArg (*Op, UnnamedOp->Common.Value.Arg);
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if ((*Op)->Common.AmlOpcode == AML_REGION_OP ||
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(*Op)->Common.AmlOpcode == AML_DATA_REGION_OP)
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{
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/*
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* Defer final parsing of an OperationRegion body, because we don't
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* have enough info in the first pass to parse it correctly (i.e.,
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* there may be method calls within the TermArg elements of the body.)
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*
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* However, we must continue parsing because the opregion is not a
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* standalone package -- we don't know where the end is at this point.
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*
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* (Length is unknown until parse of the body complete)
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*/
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(*Op)->Named.Data = AmlOpStart;
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(*Op)->Named.Length = 0;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsCreateOp
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*
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* PARAMETERS: WalkState - Current state
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* AmlOpStart - Op start in AML
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* NewOp - Returned Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get Op from AML
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiPsCreateOp (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT **NewOp)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_PARSE_OBJECT *Op;
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ACPI_PARSE_OBJECT *NamedOp = NULL;
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ACPI_PARSE_OBJECT *ParentScope;
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UINT8 ArgumentCount;
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const ACPI_OPCODE_INFO *OpInfo;
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ACPI_FUNCTION_TRACE_PTR (PsCreateOp, WalkState);
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Status = AcpiPsGetAmlOpcode (WalkState);
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if (Status == AE_CTRL_PARSE_CONTINUE)
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{
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return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
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}
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/* Create Op structure and append to parent's argument list */
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WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode);
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Op = AcpiPsAllocOp (WalkState->Opcode);
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if (!Op)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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if (WalkState->OpInfo->Flags & AML_NAMED)
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{
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Status = AcpiPsBuildNamedOp (WalkState, AmlOpStart, Op, &NamedOp);
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AcpiPsFreeOp (Op);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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*NewOp = NamedOp;
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return_ACPI_STATUS (AE_OK);
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}
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/* Not a named opcode, just allocate Op and append to parent */
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if (WalkState->OpInfo->Flags & AML_CREATE)
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{
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/*
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* Backup to beginning of CreateXXXfield declaration
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* BodyLength is unknown until we parse the body
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*/
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Op->Named.Data = AmlOpStart;
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Op->Named.Length = 0;
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}
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if (WalkState->Opcode == AML_BANK_FIELD_OP)
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{
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/*
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* Backup to beginning of BankField declaration
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* BodyLength is unknown until we parse the body
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*/
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Op->Named.Data = AmlOpStart;
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Op->Named.Length = 0;
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}
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ParentScope = AcpiPsGetParentScope (&(WalkState->ParserState));
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AcpiPsAppendArg (ParentScope, Op);
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if (ParentScope)
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{
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OpInfo = AcpiPsGetOpcodeInfo (ParentScope->Common.AmlOpcode);
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if (OpInfo->Flags & AML_HAS_TARGET)
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{
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ArgumentCount = AcpiPsGetArgumentCount (OpInfo->Type);
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if (ParentScope->Common.ArgListLength > ArgumentCount)
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{
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Op->Common.Flags |= ACPI_PARSEOP_TARGET;
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}
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}
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else if (ParentScope->Common.AmlOpcode == AML_INCREMENT_OP)
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{
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Op->Common.Flags |= ACPI_PARSEOP_TARGET;
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}
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}
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if (WalkState->DescendingCallback != NULL)
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{
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/*
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* Find the object. This will either insert the object into
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* the namespace or simply look it up
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*/
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WalkState->Op = *NewOp = Op;
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Status = WalkState->DescendingCallback (WalkState, &Op);
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Status = AcpiPsNextParseState (WalkState, Op, Status);
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if (Status == AE_CTRL_PENDING)
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{
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Status = AE_CTRL_PARSE_PENDING;
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}
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}
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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: AcpiPsCompleteOp
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*
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* PARAMETERS: WalkState - Current state
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* Op - Returned Op
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* Status - Parse status before complete Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Complete Op
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiPsCompleteOp (
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT **Op,
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ACPI_STATUS Status)
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{
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ACPI_STATUS Status2;
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ACPI_FUNCTION_TRACE_PTR (PsCompleteOp, WalkState);
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/*
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* Finished one argument of the containing scope
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*/
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WalkState->ParserState.Scope->ParseScope.ArgCount--;
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/* Close this Op (will result in parse subtree deletion) */
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Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
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if (ACPI_FAILURE (Status2))
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{
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return_ACPI_STATUS (Status2);
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}
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*Op = NULL;
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switch (Status)
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{
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case AE_OK:
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break;
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case AE_CTRL_TRANSFER:
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/* We are about to transfer to a called method */
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WalkState->PrevOp = NULL;
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WalkState->PrevArgTypes = WalkState->ArgTypes;
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return_ACPI_STATUS (Status);
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case AE_CTRL_END:
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AcpiPsPopScope (&(WalkState->ParserState), Op,
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&WalkState->ArgTypes, &WalkState->ArgCount);
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if (*Op)
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{
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WalkState->Op = *Op;
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WalkState->OpInfo = AcpiPsGetOpcodeInfo ((*Op)->Common.AmlOpcode);
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WalkState->Opcode = (*Op)->Common.AmlOpcode;
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Status = WalkState->AscendingCallback (WalkState);
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Status = AcpiPsNextParseState (WalkState, *Op, Status);
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Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
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if (ACPI_FAILURE (Status2))
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{
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return_ACPI_STATUS (Status2);
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}
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}
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Status = AE_OK;
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break;
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case AE_CTRL_BREAK:
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case AE_CTRL_CONTINUE:
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/* Pop off scopes until we find the While */
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while (!(*Op) || ((*Op)->Common.AmlOpcode != AML_WHILE_OP))
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{
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AcpiPsPopScope (&(WalkState->ParserState), Op,
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&WalkState->ArgTypes, &WalkState->ArgCount);
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}
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/* Close this iteration of the While loop */
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WalkState->Op = *Op;
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WalkState->OpInfo = AcpiPsGetOpcodeInfo ((*Op)->Common.AmlOpcode);
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WalkState->Opcode = (*Op)->Common.AmlOpcode;
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Status = WalkState->AscendingCallback (WalkState);
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Status = AcpiPsNextParseState (WalkState, *Op, Status);
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Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
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if (ACPI_FAILURE (Status2))
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{
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return_ACPI_STATUS (Status2);
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}
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Status = AE_OK;
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break;
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case AE_CTRL_TERMINATE:
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/* Clean up */
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do
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{
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if (*Op)
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{
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Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
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if (ACPI_FAILURE (Status2))
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{
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return_ACPI_STATUS (Status2);
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}
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AcpiUtDeleteGenericState (
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AcpiUtPopGenericState (&WalkState->ControlState));
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}
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AcpiPsPopScope (&(WalkState->ParserState), Op,
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&WalkState->ArgTypes, &WalkState->ArgCount);
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} while (*Op);
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return_ACPI_STATUS (AE_OK);
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default: /* All other non-AE_OK status */
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do
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{
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if (*Op)
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{
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Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
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if (ACPI_FAILURE (Status2))
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{
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return_ACPI_STATUS (Status2);
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}
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}
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AcpiPsPopScope (&(WalkState->ParserState), Op,
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&WalkState->ArgTypes, &WalkState->ArgCount);
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} while (*Op);
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#if 0
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/*
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* TBD: Cleanup parse ops on error
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*/
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if (*Op == NULL)
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{
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AcpiPsPopScope (ParserState, Op,
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&WalkState->ArgTypes, &WalkState->ArgCount);
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}
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#endif
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WalkState->PrevOp = NULL;
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WalkState->PrevArgTypes = WalkState->ArgTypes;
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return_ACPI_STATUS (Status);
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}
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/* This scope complete? */
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if (AcpiPsHasCompletedScope (&(WalkState->ParserState)))
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{
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AcpiPsPopScope (&(WalkState->ParserState), Op,
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&WalkState->ArgTypes, &WalkState->ArgCount);
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ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *Op));
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}
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else
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{
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|
*Op = NULL;
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsCompleteFinalOp
|
|
*
|
|
* PARAMETERS: WalkState - Current state
|
|
* Op - Current Op
|
|
* Status - Current parse status before complete last
|
|
* Op
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Complete last Op.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiPsCompleteFinalOp (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_STATUS Status)
|
|
{
|
|
ACPI_STATUS Status2;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (PsCompleteFinalOp, WalkState);
|
|
|
|
|
|
/*
|
|
* Complete the last Op (if not completed), and clear the scope stack.
|
|
* It is easily possible to end an AML "package" with an unbounded number
|
|
* of open scopes (such as when several ASL blocks are closed with
|
|
* sequential closing braces). We want to terminate each one cleanly.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", Op));
|
|
do
|
|
{
|
|
if (Op)
|
|
{
|
|
if (WalkState->AscendingCallback != NULL)
|
|
{
|
|
WalkState->Op = Op;
|
|
WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
|
|
WalkState->Opcode = Op->Common.AmlOpcode;
|
|
|
|
Status = WalkState->AscendingCallback (WalkState);
|
|
Status = AcpiPsNextParseState (WalkState, Op, Status);
|
|
if (Status == AE_CTRL_PENDING)
|
|
{
|
|
Status = AcpiPsCompleteOp (WalkState, &Op, AE_OK);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
if (Status == AE_CTRL_TERMINATE)
|
|
{
|
|
Status = AE_OK;
|
|
|
|
/* Clean up */
|
|
do
|
|
{
|
|
if (Op)
|
|
{
|
|
Status2 = AcpiPsCompleteThisOp (WalkState, Op);
|
|
if (ACPI_FAILURE (Status2))
|
|
{
|
|
return_ACPI_STATUS (Status2);
|
|
}
|
|
}
|
|
|
|
AcpiPsPopScope (&(WalkState->ParserState), &Op,
|
|
&WalkState->ArgTypes, &WalkState->ArgCount);
|
|
|
|
} while (Op);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
else if (ACPI_FAILURE (Status))
|
|
{
|
|
/* First error is most important */
|
|
|
|
(void) AcpiPsCompleteThisOp (WalkState, Op);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
Status2 = AcpiPsCompleteThisOp (WalkState, Op);
|
|
if (ACPI_FAILURE (Status2))
|
|
{
|
|
return_ACPI_STATUS (Status2);
|
|
}
|
|
}
|
|
|
|
AcpiPsPopScope (&(WalkState->ParserState), &Op, &WalkState->ArgTypes,
|
|
&WalkState->ArgCount);
|
|
|
|
} while (Op);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|