773 lines
22 KiB
C
773 lines
22 KiB
C
/******************************************************************************
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*
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* Module Name: prscan - Preprocessor start-up and file scan module
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, 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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#define _DECLARE_PR_GLOBALS
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#include "aslcompiler.h"
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#include "dtcompiler.h"
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/*
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* TBDs:
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*
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* No nested macros, maybe never
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* Implement ASL "Include" as well as "#include" here?
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*/
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#define _COMPONENT ASL_PREPROCESSOR
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ACPI_MODULE_NAME ("prscan")
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/* Local prototypes */
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static void
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PrPreprocessInputFile (
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void);
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static void
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PrDoDirective (
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char *DirectiveToken,
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char **Next,
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BOOLEAN *IgnoringThisCodeBlock);
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static int
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PrMatchDirective (
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char *Directive);
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/*
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* Supported preprocessor directives
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*/
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static const PR_DIRECTIVE_INFO Gbl_DirectiveInfo[] =
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{
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{"define", 1},
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{"elif", 0}, /* Converted to #else..#if internally */
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{"else", 0},
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{"endif", 0},
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{"error", 1},
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{"if", 1},
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{"ifdef", 1},
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{"ifndef", 1},
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{"include", 0}, /* Argument is not standard format, so 0 */
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{"line", 1},
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{"pragma", 1},
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{"undef", 1},
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{"warning", 1},
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{NULL, 0}
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};
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enum Gbl_DirectiveIndexes
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{
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PR_DIRECTIVE_DEFINE = 0,
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PR_DIRECTIVE_ELIF,
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PR_DIRECTIVE_ELSE,
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PR_DIRECTIVE_ENDIF,
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PR_DIRECTIVE_ERROR,
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PR_DIRECTIVE_IF,
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PR_DIRECTIVE_IFDEF,
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PR_DIRECTIVE_IFNDEF,
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PR_DIRECTIVE_INCLUDE,
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PR_DIRECTIVE_LINE,
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PR_DIRECTIVE_PRAGMA,
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PR_DIRECTIVE_UNDEF,
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PR_DIRECTIVE_WARNING,
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};
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#define ASL_DIRECTIVE_NOT_FOUND -1
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/*******************************************************************************
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*
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* FUNCTION: PrInitializePreprocessor
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Startup initialization for the Preprocessor.
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*
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******************************************************************************/
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void
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PrInitializePreprocessor (
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void)
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{
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/* Init globals and the list of #defines */
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PrInitializeGlobals ();
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Gbl_DefineList = NULL;
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}
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/*******************************************************************************
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*
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* FUNCTION: PrInitializeGlobals
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize globals for the Preprocessor. Used for startuup
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* initialization and re-initialization between compiles during
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* a multiple source file compile.
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*
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******************************************************************************/
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void
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PrInitializeGlobals (
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void)
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{
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/* Init globals */
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Gbl_IfDepth = 0;
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Gbl_InputFileList = NULL;
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Gbl_CurrentLineNumber = 0;
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Gbl_PreprocessorLineNumber = 1;
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Gbl_PreprocessorError = FALSE;
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}
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/*******************************************************************************
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*
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* FUNCTION: PrTerminatePreprocessor
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Termination of the preprocessor. Delete lists. Keep any
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* defines that were specified on the command line, in order to
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* support multiple compiles with a single compiler invocation.
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*
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******************************************************************************/
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void
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PrTerminatePreprocessor (
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void)
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{
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PR_DEFINE_INFO *DefineInfo;
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/*
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* The persistent defines (created on the command line) are always at the
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* end of the list. We save them.
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*/
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while ((Gbl_DefineList) && (!Gbl_DefineList->Persist))
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{
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DefineInfo = Gbl_DefineList;
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Gbl_DefineList = DefineInfo->Next;
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ACPI_FREE (DefineInfo->Replacement);
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ACPI_FREE (DefineInfo->Identifier);
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ACPI_FREE (DefineInfo);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: PrDoPreprocess
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*
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* PARAMETERS: None
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*
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* RETURN: Error Status. TRUE if error, FALSE if OK.
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*
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* DESCRIPTION: Main entry point for the iASL Preprocessor. Input file must
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* be already open. Handles multiple input files via the
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* #include directive.
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*
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******************************************************************************/
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BOOLEAN
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PrDoPreprocess (
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void)
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{
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BOOLEAN MoreInputFiles;
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DbgPrint (ASL_DEBUG_OUTPUT, "Starting preprocessing phase\n\n");
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FlSeekFile (ASL_FILE_INPUT, 0);
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PrDumpPredefinedNames ();
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/* Main preprocessor loop, handles include files */
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do
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{
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PrPreprocessInputFile ();
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MoreInputFiles = PrPopInputFileStack ();
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} while (MoreInputFiles);
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/*
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* TBD: is this necessary? (Do we abort on any preprocessing errors?)
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*/
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if (Gbl_PreprocessorError)
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{
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/* TBD: can't use source_output file for preprocessor error reporting */
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Gbl_Files[ASL_FILE_SOURCE_OUTPUT].Handle = NULL;
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PrTerminatePreprocessor ();
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return (TRUE);
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}
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/* Point compiler input to the new preprocessor file (.i) */
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FlCloseFile (ASL_FILE_INPUT);
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Gbl_Files[ASL_FILE_INPUT].Handle = Gbl_Files[ASL_FILE_PREPROCESSOR].Handle;
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AslCompilerin = Gbl_Files[ASL_FILE_INPUT].Handle;
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/* Reset globals to allow compiler to run */
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FlSeekFile (ASL_FILE_INPUT, 0);
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Gbl_CurrentLineNumber = 1;
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DbgPrint (ASL_DEBUG_OUTPUT, "Preprocessing phase complete \n\n");
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: PrPreprocessInputFile
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Preprocess one entire file, line-by-line.
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*
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* Input: Raw user ASL from ASL_FILE_INPUT
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* Output: Preprocessed file written to ASL_FILE_PREPROCESSOR
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*
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******************************************************************************/
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static void
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PrPreprocessInputFile (
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void)
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{
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UINT32 Offset;
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char *Token;
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char *ReplaceString;
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PR_DEFINE_INFO *DefineInfo;
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ACPI_SIZE TokenOffset;
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BOOLEAN IgnoringThisCodeBlock = FALSE;
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char *Next;
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int OffsetAdjust;
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/* Scan line-by-line. Comments and blank lines are skipped by this function */
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while ((Offset = DtGetNextLine (Gbl_Files[ASL_FILE_INPUT].Handle)) != ASL_EOF)
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{
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/* Need a copy of the input line for strok() */
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strcpy (Gbl_MainTokenBuffer, Gbl_CurrentLineBuffer);
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Token = PrGetNextToken (Gbl_MainTokenBuffer, PR_TOKEN_SEPARATORS, &Next);
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OffsetAdjust = 0;
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/* All preprocessor directives must begin with '#' */
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if (Token && (*Token == '#'))
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{
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if (strlen (Token) == 1)
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{
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Token = PrGetNextToken (NULL, PR_TOKEN_SEPARATORS, &Next);
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}
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else
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{
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Token++; /* Skip leading # */
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}
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/* Execute the directive, do not write line to output file */
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PrDoDirective (Token, &Next, &IgnoringThisCodeBlock);
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continue;
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}
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/*
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* If we are currently within the part of an IF/ELSE block that is
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* FALSE, ignore the line and do not write it to the output file.
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* This continues until an #else or #endif is encountered.
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*/
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if (IgnoringThisCodeBlock == TRUE)
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{
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continue;
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}
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/* Match and replace all #defined names within this source line */
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while (Token)
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{
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DefineInfo = PrMatchDefine (Token);
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if (DefineInfo)
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{
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if (DefineInfo->Body)
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{
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/* This is a macro */
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"Matched Macro: %s->%s\n",
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Gbl_CurrentLineNumber, DefineInfo->Identifier,
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DefineInfo->Replacement);
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PrDoMacroInvocation (Gbl_MainTokenBuffer, Token,
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DefineInfo, &Next);
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}
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else
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{
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ReplaceString = DefineInfo->Replacement;
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/* Replace the name in the original line buffer */
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TokenOffset = Token - Gbl_MainTokenBuffer + OffsetAdjust;
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PrReplaceData (
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&Gbl_CurrentLineBuffer[TokenOffset], strlen (Token),
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ReplaceString, strlen (ReplaceString));
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/* Adjust for length difference between old and new name length */
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OffsetAdjust += strlen (ReplaceString) - strlen (Token);
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"Matched #define: %s->%s\n",
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Gbl_CurrentLineNumber, Token,
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*ReplaceString ? ReplaceString : "(NULL STRING)");
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}
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}
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Token = PrGetNextToken (NULL, PR_TOKEN_SEPARATORS, &Next);
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}
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#if 0
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/* Line prefix */
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FlPrintFile (ASL_FILE_PREPROCESSOR, "/* %14s %.5u i:%.5u */ ",
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Gbl_Files[ASL_FILE_INPUT].Filename,
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Gbl_CurrentLineNumber, Gbl_PreprocessorLineNumber);
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#endif
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/*
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* Emit a #line directive if necessary, to keep the line numbers in
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* the (.i) file synchronized with the original source code file, so
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* that the correct line number appears in any error messages
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* generated by the actual compiler.
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*/
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if (Gbl_CurrentLineNumber > (Gbl_PreviousLineNumber + 1))
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{
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FlPrintFile (ASL_FILE_PREPROCESSOR, "#line %u\n",
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Gbl_CurrentLineNumber);
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}
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Gbl_PreviousLineNumber = Gbl_CurrentLineNumber;
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Gbl_PreprocessorLineNumber++;
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/*
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* Now we can write the possibly modified source line to the
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* preprocessor (.i) file
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*/
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FlWriteFile (ASL_FILE_PREPROCESSOR, Gbl_CurrentLineBuffer,
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strlen (Gbl_CurrentLineBuffer));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: PrDoDirective
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*
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* PARAMETERS: Directive - Pointer to directive name token
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* Next - "Next" buffer from GetNextToken
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* IgnoringThisCodeBlock - Where the "ignore code" flag is
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* returned.
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*
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* RETURN: IgnoringThisCodeBlock: Set to TRUE if we are skipping the FALSE
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* part of an #if or #else block. Set to FALSE when the
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* corresponding #else or #endif is encountered.
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*
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* DESCRIPTION: Main processing for all preprocessor directives
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*
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******************************************************************************/
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static void
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PrDoDirective (
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char *DirectiveToken,
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char **Next,
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BOOLEAN *IgnoringThisCodeBlock)
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{
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char *Token = Gbl_MainTokenBuffer;
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char *Token2;
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char *End;
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UINT64 Value;
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ACPI_SIZE TokenOffset;
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int Directive;
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ACPI_STATUS Status;
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if (!DirectiveToken)
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{
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goto SyntaxError;
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}
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Directive = PrMatchDirective (DirectiveToken);
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if (Directive == ASL_DIRECTIVE_NOT_FOUND)
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{
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PrError (ASL_ERROR, ASL_MSG_UNKNOWN_DIRECTIVE,
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THIS_TOKEN_OFFSET (DirectiveToken));
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"#%s: Unknown directive\n",
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Gbl_CurrentLineNumber, DirectiveToken);
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return;
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}
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/* TBD: Need a faster way to do this: */
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if ((Directive == PR_DIRECTIVE_ELIF) ||
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(Directive == PR_DIRECTIVE_ELSE) ||
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(Directive == PR_DIRECTIVE_ENDIF))
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{
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID "Begin #%s\n",
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Gbl_CurrentLineNumber, Gbl_DirectiveInfo[Directive].Name);
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}
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/*
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* Need to always check for #else, #elif, #endif regardless of
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* whether we are ignoring the current code block, since these
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* are conditional code block terminators.
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*/
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switch (Directive)
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{
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case PR_DIRECTIVE_ELIF:
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*IgnoringThisCodeBlock = !(*IgnoringThisCodeBlock);
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if (*IgnoringThisCodeBlock == TRUE)
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{
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/* Not executing the ELSE part -- all done here */
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return;
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}
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/* Will execute the ELSE..IF part */
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"#elif - Executing else block\n",
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Gbl_CurrentLineNumber);
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Directive = PR_DIRECTIVE_IF;
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break;
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case PR_DIRECTIVE_ELSE:
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*IgnoringThisCodeBlock = !(*IgnoringThisCodeBlock);
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return;
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case PR_DIRECTIVE_ENDIF:
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*IgnoringThisCodeBlock = FALSE;
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Gbl_IfDepth--;
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if (Gbl_IfDepth < 0)
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{
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PrError (ASL_ERROR, ASL_MSG_ENDIF_MISMATCH,
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THIS_TOKEN_OFFSET (DirectiveToken));
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Gbl_IfDepth = 0;
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}
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return;
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default:
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break;
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}
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/*
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* At this point, if we are ignoring the current code block,
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* do not process any more directives (i.e., ignore them also.)
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*/
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if (*IgnoringThisCodeBlock == TRUE)
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{
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return;
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}
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID "Begin #%s\n",
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Gbl_CurrentLineNumber, Gbl_DirectiveInfo[Directive].Name);
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/* Most directives have at least one argument */
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if (Gbl_DirectiveInfo[Directive].ArgCount == 1)
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{
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Token = PrGetNextToken (NULL, PR_TOKEN_SEPARATORS, Next);
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if (!Token)
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{
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goto SyntaxError;
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}
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}
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switch (Directive)
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{
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case PR_DIRECTIVE_DEFINE:
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/*
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* By definition, if first char after the name is a paren,
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* this is a function macro.
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*/
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TokenOffset = Token - Gbl_MainTokenBuffer + strlen (Token);
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if (*(&Gbl_CurrentLineBuffer[TokenOffset]) == '(')
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{
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#ifndef MACROS_SUPPORTED
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AcpiOsPrintf ("%s ERROR - line %u: #define macros are not supported yet\n",
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Gbl_CurrentLineBuffer, Gbl_CurrentLineNumber);
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exit(1);
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#else
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PrAddMacro (Token, Next);
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#endif
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}
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else
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{
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/* Use the remainder of the line for the #define */
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Token2 = *Next;
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if (Token2)
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{
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while ((*Token2 == ' ') || (*Token2 == '\t'))
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{
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Token2++;
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}
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End = Token2;
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while (*End != '\n')
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{
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End++;
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}
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*End = 0;
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}
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else
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{
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Token2 = "";
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}
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#if 0
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Token2 = PrGetNextToken (NULL, "\n", /*PR_TOKEN_SEPARATORS,*/ Next);
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if (!Token2)
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{
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Token2 = "";
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}
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#endif
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DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
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"New #define: %s->%s\n",
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Gbl_CurrentLineNumber, Token, Token2);
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PrAddDefine (Token, Token2, FALSE);
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}
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break;
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case PR_DIRECTIVE_ERROR:
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/* TBD compiler should abort */
|
|
/* Note: No macro expansion */
|
|
|
|
PrError (ASL_ERROR, ASL_MSG_ERROR_DIRECTIVE,
|
|
THIS_TOKEN_OFFSET (Token));
|
|
break;
|
|
|
|
case PR_DIRECTIVE_IF:
|
|
TokenOffset = Token - Gbl_MainTokenBuffer;
|
|
|
|
/* Need to expand #define macros in the expression string first */
|
|
|
|
Status = PrResolveIntegerExpression (
|
|
&Gbl_CurrentLineBuffer[TokenOffset-1], &Value);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (!Value)
|
|
{
|
|
*IgnoringThisCodeBlock = TRUE;
|
|
}
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
|
|
"Resolved #if: %8.8X%8.8X %s\n",
|
|
Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Value),
|
|
*IgnoringThisCodeBlock ? "<Skipping Block>" : "<Executing Block>");
|
|
|
|
Gbl_IfDepth++;
|
|
break;
|
|
|
|
case PR_DIRECTIVE_IFDEF:
|
|
if (!PrMatchDefine (Token))
|
|
{
|
|
*IgnoringThisCodeBlock = TRUE;
|
|
}
|
|
|
|
Gbl_IfDepth++;
|
|
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
|
|
"Start #ifdef %s\n", Gbl_CurrentLineNumber,
|
|
*IgnoringThisCodeBlock ? "<Skipping Block>" : "<Executing Block>");
|
|
break;
|
|
|
|
case PR_DIRECTIVE_IFNDEF:
|
|
if (PrMatchDefine (Token))
|
|
{
|
|
*IgnoringThisCodeBlock = TRUE;
|
|
}
|
|
|
|
Gbl_IfDepth++;
|
|
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
|
|
"Start #ifndef %2.2X\n", Gbl_CurrentLineNumber,
|
|
*IgnoringThisCodeBlock, Gbl_CurrentLineNumber);
|
|
break;
|
|
|
|
case PR_DIRECTIVE_INCLUDE:
|
|
Token = PrGetNextToken (NULL, " \"<>", Next);
|
|
if (!Token)
|
|
{
|
|
goto SyntaxError;
|
|
}
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
|
|
"Start #include file \"%s\"\n", Gbl_CurrentLineNumber,
|
|
Token, Gbl_CurrentLineNumber);
|
|
|
|
PrOpenIncludeFile (Token);
|
|
break;
|
|
|
|
case PR_DIRECTIVE_LINE:
|
|
TokenOffset = Token - Gbl_MainTokenBuffer;
|
|
|
|
Status = PrResolveIntegerExpression (
|
|
&Gbl_CurrentLineBuffer[TokenOffset-1], &Value);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return;
|
|
}
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
|
|
"User #line invocation %s\n", Gbl_CurrentLineNumber,
|
|
Token);
|
|
|
|
/* Update local line numbers */
|
|
|
|
Gbl_CurrentLineNumber = (UINT32) Value;
|
|
Gbl_PreviousLineNumber = 0;
|
|
|
|
/* Emit #line into the preprocessor file */
|
|
|
|
FlPrintFile (ASL_FILE_PREPROCESSOR, "#line %u \"%s\"\n",
|
|
Gbl_CurrentLineNumber, Gbl_Files[ASL_FILE_INPUT].Filename);
|
|
break;
|
|
|
|
case PR_DIRECTIVE_PRAGMA:
|
|
/* Only "#pragma message" supported at this time */
|
|
|
|
if (strcmp (Token, "message"))
|
|
{
|
|
PrError (ASL_ERROR, ASL_MSG_UNKNOWN_PRAGMA,
|
|
THIS_TOKEN_OFFSET (Token));
|
|
return;
|
|
}
|
|
|
|
Token = PrGetNextToken (NULL, PR_TOKEN_SEPARATORS, Next);
|
|
if (!Token)
|
|
{
|
|
goto SyntaxError;
|
|
}
|
|
|
|
TokenOffset = Token - Gbl_MainTokenBuffer;
|
|
AcpiOsPrintf ("%s\n", &Gbl_CurrentLineBuffer[TokenOffset]);
|
|
break;
|
|
|
|
case PR_DIRECTIVE_UNDEF:
|
|
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
|
|
"#undef: %s\n", Gbl_CurrentLineNumber, Token);
|
|
|
|
PrRemoveDefine (Token);
|
|
break;
|
|
|
|
case PR_DIRECTIVE_WARNING:
|
|
PrError (ASL_WARNING, ASL_MSG_ERROR_DIRECTIVE,
|
|
THIS_TOKEN_OFFSET (Token));
|
|
break;
|
|
|
|
default:
|
|
/* Should never get here */
|
|
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
|
|
"Unrecognized directive: %u\n",
|
|
Gbl_CurrentLineNumber, Directive);
|
|
break;
|
|
}
|
|
|
|
return;
|
|
|
|
|
|
SyntaxError:
|
|
|
|
PrError (ASL_ERROR, ASL_MSG_DIRECTIVE_SYNTAX,
|
|
THIS_TOKEN_OFFSET (DirectiveToken));
|
|
return;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: PrMatchDirective
|
|
*
|
|
* PARAMETERS: Directive - Pointer to directive name token
|
|
*
|
|
* RETURN: Index into command array, -1 if not found
|
|
*
|
|
* DESCRIPTION: Lookup the incoming directive in the known directives table.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static int
|
|
PrMatchDirective (
|
|
char *Directive)
|
|
{
|
|
int i;
|
|
|
|
|
|
if (!Directive || Directive[0] == 0)
|
|
{
|
|
return (ASL_DIRECTIVE_NOT_FOUND);
|
|
}
|
|
|
|
for (i = 0; Gbl_DirectiveInfo[i].Name; i++)
|
|
{
|
|
if (!strcmp (Gbl_DirectiveInfo[i].Name, Directive))
|
|
{
|
|
return (i);
|
|
}
|
|
}
|
|
|
|
return (ASL_DIRECTIVE_NOT_FOUND); /* Command not recognized */
|
|
}
|