//===----------------------------------------------------------------------===//
#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
-#include "llvm/ADT/Twine.h"
using namespace llvm;
namespace {
AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveData>(".data");
AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveText>(".text");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveBSS>(".bss");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveRoData>(".rodata");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveTData>(".tdata");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveTBSS>(".tbss");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveDataRel>(".data.rel");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveDataRelRo>(".data.rel.ro");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveDataRelRoLocal>(".data.rel.ro.local");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveEhFrame>(".eh_frame");
AddDirectiveHandler<&ELFAsmParser::ParseDirectiveSection>(".section");
AddDirectiveHandler<&ELFAsmParser::ParseDirectiveSize>(".size");
- AddDirectiveHandler<&ELFAsmParser::ParseDirectiveLEB128>(".sleb128");
- AddDirectiveHandler<&ELFAsmParser::ParseDirectiveLEB128>(".uleb128");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectivePrevious>(".previous");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveType>(".type");
}
+ // FIXME: Part of this logic is duplicated in the MCELFStreamer. What is
+ // the best way for us to get access to it?
bool ParseSectionDirectiveData(StringRef, SMLoc) {
return ParseSectionSwitch(".data", MCSectionELF::SHT_PROGBITS,
MCSectionELF::SHF_WRITE |MCSectionELF::SHF_ALLOC,
MCSectionELF::SHF_EXECINSTR |
MCSectionELF::SHF_ALLOC, SectionKind::getText());
}
- bool ParseDirectiveLEB128(StringRef, SMLoc);
+ bool ParseSectionDirectiveBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".bss", MCSectionELF::SHT_NOBITS,
+ MCSectionELF::SHF_WRITE |
+ MCSectionELF::SHF_ALLOC, SectionKind::getBSS());
+ }
+ bool ParseSectionDirectiveRoData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".rodata", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC,
+ SectionKind::getReadOnly());
+ }
+ bool ParseSectionDirectiveTData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".tdata", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC |
+ MCSectionELF::SHF_TLS | MCSectionELF::SHF_WRITE,
+ SectionKind::getThreadData());
+ }
+ bool ParseSectionDirectiveTBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".tbss", MCSectionELF::SHT_NOBITS,
+ MCSectionELF::SHF_ALLOC |
+ MCSectionELF::SHF_TLS | MCSectionELF::SHF_WRITE,
+ SectionKind::getThreadBSS());
+ }
+ bool ParseSectionDirectiveDataRel(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC |
+ MCSectionELF::SHF_WRITE,
+ SectionKind::getDataRel());
+ }
+ bool ParseSectionDirectiveDataRelRo(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel.ro", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC |
+ MCSectionELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRel());
+ }
+ bool ParseSectionDirectiveDataRelRoLocal(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel.ro.local", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC |
+ MCSectionELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRelLocal());
+ }
+ bool ParseSectionDirectiveEhFrame(StringRef, SMLoc) {
+ return ParseSectionSwitch(".eh_frame", MCSectionELF::SHT_PROGBITS,
+ MCSectionELF::SHF_ALLOC |
+ MCSectionELF::SHF_WRITE,
+ SectionKind::getDataRel());
+ }
bool ParseDirectiveSection(StringRef, SMLoc);
bool ParseDirectiveSize(StringRef, SMLoc);
+ bool ParseDirectivePrevious(StringRef, SMLoc);
+ bool ParseDirectiveType(StringRef, SMLoc);
+
+private:
+ bool ParseSectionName(StringRef &SectionName);
};
}
return false;
}
+bool ELFAsmParser::ParseSectionName(StringRef &SectionName) {
+ // A section name can contain -, so we cannot just use
+ // ParseIdentifier.
+ SMLoc FirstLoc = getLexer().getLoc();
+ unsigned Size = 0;
+
+ for (;;) {
+ StringRef Tmp;
+ unsigned CurSize;
+
+ SMLoc PrevLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Minus)) {
+ CurSize = 1;
+ Lex(); // Consume the "-".
+ } else if (!getParser().ParseIdentifier(Tmp))
+ CurSize = Tmp.size();
+ else
+ break;
+
+ Size += CurSize;
+ SectionName = StringRef(FirstLoc.getPointer(), Size);
+
+ // Make sure the following token is adjacent.
+ if (PrevLoc.getPointer() + CurSize != getTok().getLoc().getPointer())
+ break;
+ }
+ if (Size == 0)
+ return true;
+
+ return false;
+}
+
// FIXME: This is a work in progress.
bool ELFAsmParser::ParseDirectiveSection(StringRef, SMLoc) {
StringRef SectionName;
- // FIXME: This doesn't parse section names like ".note.GNU-stack" correctly.
- if (getParser().ParseIdentifier(SectionName))
+
+ if (ParseSectionName(SectionName))
return TokError("expected identifier in directive");
std::string FlagsStr;
? SectionKind::getText()
: SectionKind::getDataRel();
getStreamer().SwitchSection(getContext().getELFSection(SectionName, Type,
- Flags, Kind, false));
+ Flags, Kind, false,
+ Size));
return false;
}
-bool ELFAsmParser::ParseDirectiveLEB128(StringRef DirName, SMLoc) {
- int64_t Value;
- if (getParser().ParseAbsoluteExpression(Value))
- return true;
+bool ELFAsmParser::ParseDirectivePrevious(StringRef DirName, SMLoc) {
+ const MCSection *PreviousSection = getStreamer().getPreviousSection();
+ if (PreviousSection != NULL)
+ getStreamer().SwitchSection(PreviousSection);
+
+ return false;
+}
+
+/// ParseDirectiveELFType
+/// ::= .type identifier , @attribute
+bool ELFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.type' directive");
+ Lex();
+
+ if (getLexer().isNot(AsmToken::At))
+ return TokError("expected '@' before type");
+ Lex();
+
+ StringRef Type;
+ SMLoc TypeLoc;
+
+ TypeLoc = getLexer().getLoc();
+ if (getParser().ParseIdentifier(Type))
+ return TokError("expected symbol type in directive");
+
+ MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Type)
+ .Case("function", MCSA_ELF_TypeFunction)
+ .Case("object", MCSA_ELF_TypeObject)
+ .Case("tls_object", MCSA_ELF_TypeTLS)
+ .Case("common", MCSA_ELF_TypeCommon)
+ .Case("notype", MCSA_ELF_TypeNoType)
+ .Default(MCSA_Invalid);
+
+ if (Attr == MCSA_Invalid)
+ return Error(TypeLoc, "unsupported attribute in '.type' directive");
if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in directive");
+ return TokError("unexpected token in '.type' directive");
- // FIXME: Add proper MC support.
- if (getContext().getAsmInfo().hasLEB128()) {
- if (DirName[1] == 's')
- getStreamer().EmitRawText("\t.sleb128\t" + Twine(Value));
- else
- getStreamer().EmitRawText("\t.uleb128\t" + Twine(Value));
- return false;
- }
- // FIXME: This shouldn't be an error!
- return TokError("LEB128 not supported yet");
+ Lex();
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ return false;
}
namespace llvm {
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