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//===- ELFAsmParser.cpp - ELF Assembly Parser -----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCParser/MCAsmParserExtension.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
using namespace llvm;
namespace {
class ELFAsmParser : public MCAsmParserExtension {
bool ParseSectionSwitch(StringRef Section, unsigned Type,
unsigned Flags, SectionKind Kind);
public:
ELFAsmParser() {}
virtual void Initialize(MCAsmParser &Parser) {
// Call the base implementation.
this->MCAsmParserExtension::Initialize(Parser);
Parser.AddDirectiveHandler(this, ".data", MCAsmParser::DirectiveHandler(
&ELFAsmParser::ParseSectionDirectiveData));
Parser.AddDirectiveHandler(this, ".text", MCAsmParser::DirectiveHandler(
&ELFAsmParser::ParseSectionDirectiveText));
}
bool ParseSectionDirectiveData(StringRef, SMLoc) {
return ParseSectionSwitch(".data", MCSectionELF::SHT_PROGBITS,
MCSectionELF::SHF_WRITE |MCSectionELF::SHF_ALLOC,
SectionKind::getDataRel());
}
bool ParseSectionDirectiveText(StringRef, SMLoc) {
return ParseSectionSwitch(".text", MCSectionELF::SHT_PROGBITS,
MCSectionELF::SHF_EXECINSTR |
MCSectionELF::SHF_ALLOC, SectionKind::getText());
}
};
}
bool ELFAsmParser::ParseSectionSwitch(StringRef Section, unsigned Type,
unsigned Flags, SectionKind Kind) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in section switching directive");
Lex();
getStreamer().SwitchSection(getContext().getELFSection(
Section, Type, Flags, Kind));
return false;
}
namespace llvm {
MCAsmParserExtension *createELFAsmParser() {
return new ELFAsmParser;
}
}
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