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MC/AsmParser: Add a basic ELFAsmParser extension.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108185 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2010-07-12 20:08:04 +00:00
parent aa099be71f
commit 7a56fc224c
1 changed files with 45 additions and 0 deletions
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45
lib/MC/MCParser/AsmParser.cpp
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@ -18,6 +18,7 @@
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
@ -101,6 +102,35 @@ public:
bool ParseDirectiveZerofill(StringRef, SMLoc);
};
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());
}
};
}
enum { DEFAULT_ADDRSPACE = 0 };
@ -122,6 +152,9 @@ AsmParser::AsmParser(const Target &T, SourceMgr &_SM, MCContext &_Ctx,
if (_MAI.hasSubsectionsViaSymbols()) {
PlatformParser = new DarwinAsmParser;
PlatformParser->Initialize(*this);
} else {
PlatformParser = new ELFAsmParser;
PlatformParser->Initialize(*this);
}
}
@ -1051,6 +1084,18 @@ bool AsmParser::ParseDirectiveSectionSwitch(const char *Segment,
return false;
}
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;
}
bool AsmParser::ParseEscapedString(std::string &Data) {
assert(getLexer().is(AsmToken::String) && "Unexpected current token!");