145 lines
4.5 KiB
C++
145 lines
4.5 KiB
C++
//===- COFFAsmParser.cpp - COFF Assembly Parser ---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCParser/MCAsmParserExtension.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCParser/MCAsmLexer.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/Support/COFF.h"
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using namespace llvm;
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namespace {
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class COFFAsmParser : public MCAsmParserExtension {
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template<bool (COFFAsmParser::*Handler)(StringRef, SMLoc)>
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void AddDirectiveHandler(StringRef Directive) {
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getParser().AddDirectiveHandler(this, Directive,
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HandleDirective<COFFAsmParser, Handler>);
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}
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bool ParseSectionSwitch(StringRef Section,
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unsigned Characteristics,
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SectionKind Kind);
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virtual void Initialize(MCAsmParser &Parser) {
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// Call the base implementation.
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MCAsmParserExtension::Initialize(Parser);
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AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveText>(".text");
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AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveData>(".data");
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AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveBSS>(".bss");
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AddDirectiveHandler<&COFFAsmParser::ParseDirectiveDef>(".def");
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AddDirectiveHandler<&COFFAsmParser::ParseDirectiveScl>(".scl");
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AddDirectiveHandler<&COFFAsmParser::ParseDirectiveType>(".type");
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AddDirectiveHandler<&COFFAsmParser::ParseDirectiveEndef>(".endef");
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}
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bool ParseSectionDirectiveText(StringRef, SMLoc) {
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return ParseSectionSwitch(".text",
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COFF::IMAGE_SCN_CNT_CODE
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| COFF::IMAGE_SCN_MEM_EXECUTE
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| COFF::IMAGE_SCN_MEM_READ,
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SectionKind::getText());
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}
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bool ParseSectionDirectiveData(StringRef, SMLoc) {
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return ParseSectionSwitch(".data",
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COFF::IMAGE_SCN_CNT_INITIALIZED_DATA
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| COFF::IMAGE_SCN_MEM_READ
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| COFF::IMAGE_SCN_MEM_WRITE,
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SectionKind::getDataRel());
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}
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bool ParseSectionDirectiveBSS(StringRef, SMLoc) {
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return ParseSectionSwitch(".bss",
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COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA
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| COFF::IMAGE_SCN_MEM_READ
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| COFF::IMAGE_SCN_MEM_WRITE,
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SectionKind::getBSS());
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}
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bool ParseDirectiveDef(StringRef, SMLoc);
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bool ParseDirectiveScl(StringRef, SMLoc);
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bool ParseDirectiveType(StringRef, SMLoc);
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bool ParseDirectiveEndef(StringRef, SMLoc);
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public:
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COFFAsmParser() {}
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};
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} // end annonomous namespace.
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bool COFFAsmParser::ParseSectionSwitch(StringRef Section,
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unsigned Characteristics,
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SectionKind Kind) {
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if (getLexer().isNot(AsmToken::EndOfStatement))
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return TokError("unexpected token in section switching directive");
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Lex();
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getStreamer().SwitchSection(getContext().getCOFFSection(
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Section, Characteristics, Kind));
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return false;
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}
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bool COFFAsmParser::ParseDirectiveDef(StringRef, SMLoc) {
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StringRef SymbolName;
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if (getParser().ParseIdentifier(SymbolName))
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return TokError("expected identifier in directive");
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MCSymbol *Sym = getContext().GetOrCreateSymbol(SymbolName);
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getStreamer().BeginCOFFSymbolDef(Sym);
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Lex();
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return false;
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}
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bool COFFAsmParser::ParseDirectiveScl(StringRef, SMLoc) {
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int64_t SymbolStorageClass;
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if (getParser().ParseAbsoluteExpression(SymbolStorageClass))
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return true;
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if (getLexer().isNot(AsmToken::EndOfStatement))
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return TokError("unexpected token in directive");
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Lex();
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getStreamer().EmitCOFFSymbolStorageClass(SymbolStorageClass);
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return false;
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}
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bool COFFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
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int64_t Type;
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if (getParser().ParseAbsoluteExpression(Type))
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return true;
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if (getLexer().isNot(AsmToken::EndOfStatement))
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return TokError("unexpected token in directive");
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Lex();
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getStreamer().EmitCOFFSymbolType(Type);
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return false;
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}
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bool COFFAsmParser::ParseDirectiveEndef(StringRef, SMLoc) {
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Lex();
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getStreamer().EndCOFFSymbolDef();
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return false;
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}
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namespace llvm {
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MCAsmParserExtension *createCOFFAsmParser() {
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return new COFFAsmParser;
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}
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}
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