#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSectionCOFF.h"
unsigned Characteristics,
SectionKind Kind);
- virtual void Initialize(MCAsmParser &Parser) {
+ bool ParseSectionSwitch(StringRef Section, unsigned Characteristics,
+ SectionKind Kind, StringRef COMDATSymName,
+ COFF::COMDATType Type);
+
+ bool ParseSectionName(StringRef &SectionName);
+ bool ParseSectionFlags(StringRef FlagsString, unsigned* Flags);
+
+ void Initialize(MCAsmParser &Parser) override {
// Call the base implementation.
MCAsmParserExtension::Initialize(Parser);
addDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveText>(".text");
addDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveData>(".data");
addDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveBSS>(".bss");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSection>(".section");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveDef>(".def");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveScl>(".scl");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveType>(".type");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveEndef>(".endef");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveSecRel32>(".secrel32");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSecIdx>(".secidx");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSafeSEH>(".safeseh");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveLinkOnce>(".linkonce");
// Win64 EH directives.
addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartProc>(
SectionKind::getText());
}
bool ParseSectionDirectiveData(StringRef, SMLoc) {
- return ParseSectionSwitch(".data",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA
- | COFF::IMAGE_SCN_MEM_READ
- | COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getDataRel());
+ return ParseSectionSwitch(".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getData());
}
bool ParseSectionDirectiveBSS(StringRef, SMLoc) {
return ParseSectionSwitch(".bss",
SectionKind::getBSS());
}
+ bool ParseDirectiveSection(StringRef, SMLoc);
bool ParseDirectiveDef(StringRef, SMLoc);
bool ParseDirectiveScl(StringRef, SMLoc);
bool ParseDirectiveType(StringRef, SMLoc);
bool ParseDirectiveEndef(StringRef, SMLoc);
bool ParseDirectiveSecRel32(StringRef, SMLoc);
+ bool ParseDirectiveSecIdx(StringRef, SMLoc);
+ bool ParseDirectiveSafeSEH(StringRef, SMLoc);
+ bool parseCOMDATType(COFF::COMDATType &Type);
+ bool ParseDirectiveLinkOnce(StringRef, SMLoc);
// Win64 EH directives.
bool ParseSEHDirectiveStartProc(StringRef, SMLoc);
} // end annonomous namespace.
+static SectionKind computeSectionKind(unsigned Flags) {
+ if (Flags & COFF::IMAGE_SCN_MEM_EXECUTE)
+ return SectionKind::getText();
+ if (Flags & COFF::IMAGE_SCN_MEM_READ &&
+ (Flags & COFF::IMAGE_SCN_MEM_WRITE) == 0)
+ return SectionKind::getReadOnly();
+ return SectionKind::getData();
+}
+
+bool COFFAsmParser::ParseSectionFlags(StringRef FlagsString, unsigned* Flags) {
+ enum {
+ None = 0,
+ Alloc = 1 << 0,
+ Code = 1 << 1,
+ Load = 1 << 2,
+ InitData = 1 << 3,
+ Shared = 1 << 4,
+ NoLoad = 1 << 5,
+ NoRead = 1 << 6,
+ NoWrite = 1 << 7
+ };
+
+ bool ReadOnlyRemoved = false;
+ unsigned SecFlags = None;
+
+ for (char FlagChar : FlagsString) {
+ switch (FlagChar) {
+ case 'a':
+ // Ignored.
+ break;
+
+ case 'b': // bss section
+ SecFlags |= Alloc;
+ if (SecFlags & InitData)
+ return TokError("conflicting section flags 'b' and 'd'.");
+ SecFlags &= ~Load;
+ break;
+
+ case 'd': // data section
+ SecFlags |= InitData;
+ if (SecFlags & Alloc)
+ return TokError("conflicting section flags 'b' and 'd'.");
+ SecFlags &= ~NoWrite;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ break;
+
+ case 'n': // section is not loaded
+ SecFlags |= NoLoad;
+ SecFlags &= ~Load;
+ break;
+
+ case 'r': // read-only
+ ReadOnlyRemoved = false;
+ SecFlags |= NoWrite;
+ if ((SecFlags & Code) == 0)
+ SecFlags |= InitData;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ break;
+
+ case 's': // shared section
+ SecFlags |= Shared | InitData;
+ SecFlags &= ~NoWrite;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ break;
+
+ case 'w': // writable
+ SecFlags &= ~NoWrite;
+ ReadOnlyRemoved = true;
+ break;
+
+ case 'x': // executable section
+ SecFlags |= Code;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ if (!ReadOnlyRemoved)
+ SecFlags |= NoWrite;
+ break;
+
+ case 'y': // not readable
+ SecFlags |= NoRead | NoWrite;
+ break;
+
+ default:
+ return TokError("unknown flag");
+ }
+ }
+
+ *Flags = 0;
+
+ if (SecFlags == None)
+ SecFlags = InitData;
+
+ if (SecFlags & Code)
+ *Flags |= COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE;
+ if (SecFlags & InitData)
+ *Flags |= COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
+ if ((SecFlags & Alloc) && (SecFlags & Load) == 0)
+ *Flags |= COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
+ if (SecFlags & NoLoad)
+ *Flags |= COFF::IMAGE_SCN_LNK_REMOVE;
+ if ((SecFlags & NoRead) == 0)
+ *Flags |= COFF::IMAGE_SCN_MEM_READ;
+ if ((SecFlags & NoWrite) == 0)
+ *Flags |= COFF::IMAGE_SCN_MEM_WRITE;
+ if (SecFlags & Shared)
+ *Flags |= COFF::IMAGE_SCN_MEM_SHARED;
+
+ return false;
+}
+
/// ParseDirectiveSymbolAttribute
/// ::= { ".weak", ... } [ identifier ( , identifier )* ]
bool COFFAsmParser::ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc) {
if (getParser().parseIdentifier(Name))
return TokError("expected identifier in directive");
- MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
getStreamer().EmitSymbolAttribute(Sym, Attr);
bool COFFAsmParser::ParseSectionSwitch(StringRef Section,
unsigned Characteristics,
SectionKind Kind) {
+ return ParseSectionSwitch(Section, Characteristics, Kind, "", (COFF::COMDATType)0);
+}
+
+bool COFFAsmParser::ParseSectionSwitch(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ StringRef COMDATSymName,
+ COFF::COMDATType Type) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in section switching directive");
Lex();
getStreamer().SwitchSection(getContext().getCOFFSection(
- Section, Characteristics, Kind));
+ Section, Characteristics, Kind, COMDATSymName, Type));
+
+ return false;
+}
+
+bool COFFAsmParser::ParseSectionName(StringRef &SectionName) {
+ if (!getLexer().is(AsmToken::Identifier))
+ return true;
+
+ SectionName = getTok().getIdentifier();
+ Lex();
+ return false;
+}
+
+// .section name [, "flags"] [, identifier [ identifier ], identifier]
+//
+// Supported flags:
+// a: Ignored.
+// b: BSS section (uninitialized data)
+// d: data section (initialized data)
+// n: Discardable section
+// r: Readable section
+// s: Shared section
+// w: Writable section
+// x: Executable section
+// y: Not-readable section (clears 'r')
+//
+// Subsections are not supported.
+bool COFFAsmParser::ParseDirectiveSection(StringRef, SMLoc) {
+ StringRef SectionName;
+
+ if (ParseSectionName(SectionName))
+ return TokError("expected identifier in directive");
+
+ unsigned Flags = COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE;
+
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in directive");
+
+ StringRef FlagsStr = getTok().getStringContents();
+ Lex();
+
+ if (ParseSectionFlags(FlagsStr, &Flags))
+ return true;
+ }
+
+ COFF::COMDATType Type = (COFF::COMDATType)0;
+ StringRef COMDATSymName;
+ if (getLexer().is(AsmToken::Comma)) {
+ Type = COFF::IMAGE_COMDAT_SELECT_ANY;
+ Lex();
+
+ Flags |= COFF::IMAGE_SCN_LNK_COMDAT;
+
+ if (!getLexer().is(AsmToken::Identifier))
+ return TokError("expected comdat type such as 'discard' or 'largest' "
+ "after protection bits");
+
+ if (parseCOMDATType(Type))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected comma in directive");
+ Lex();
+
+ if (getParser().parseIdentifier(COMDATSymName))
+ return TokError("expected identifier in directive");
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+ SectionKind Kind = computeSectionKind(Flags);
+ if (Kind.isText()) {
+ const Triple &T = getContext().getObjectFileInfo()->getTargetTriple();
+ if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)
+ Flags |= COFF::IMAGE_SCN_MEM_16BIT;
+ }
+ ParseSectionSwitch(SectionName, Flags, Kind, COMDATSymName, Type);
return false;
}
if (getParser().parseIdentifier(SymbolName))
return TokError("expected identifier in directive");
- MCSymbol *Sym = getContext().GetOrCreateSymbol(SymbolName);
+ MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName);
getStreamer().BeginCOFFSymbolDef(Sym);
bool COFFAsmParser::ParseDirectiveSecRel32(StringRef, SMLoc) {
StringRef SymbolID;
if (getParser().parseIdentifier(SymbolID))
- return true;
+ return TokError("expected identifier in directive");
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
- MCSymbol *Symbol = getContext().GetOrCreateSymbol(SymbolID);
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
Lex();
getStreamer().EmitCOFFSecRel32(Symbol);
return false;
}
+bool COFFAsmParser::ParseDirectiveSafeSEH(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().parseIdentifier(SymbolID))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitCOFFSafeSEH(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveSecIdx(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().parseIdentifier(SymbolID))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitCOFFSectionIndex(Symbol);
+ return false;
+}
+
+/// ::= [ identifier ]
+bool COFFAsmParser::parseCOMDATType(COFF::COMDATType &Type) {
+ StringRef TypeId = getTok().getIdentifier();
+
+ Type = StringSwitch<COFF::COMDATType>(TypeId)
+ .Case("one_only", COFF::IMAGE_COMDAT_SELECT_NODUPLICATES)
+ .Case("discard", COFF::IMAGE_COMDAT_SELECT_ANY)
+ .Case("same_size", COFF::IMAGE_COMDAT_SELECT_SAME_SIZE)
+ .Case("same_contents", COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH)
+ .Case("associative", COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE)
+ .Case("largest", COFF::IMAGE_COMDAT_SELECT_LARGEST)
+ .Case("newest", COFF::IMAGE_COMDAT_SELECT_NEWEST)
+ .Default((COFF::COMDATType)0);
+
+ if (Type == 0)
+ return TokError(Twine("unrecognized COMDAT type '" + TypeId + "'"));
+
+ Lex();
+
+ return false;
+}
+
+/// ParseDirectiveLinkOnce
+/// ::= .linkonce [ identifier ]
+bool COFFAsmParser::ParseDirectiveLinkOnce(StringRef, SMLoc Loc) {
+ COFF::COMDATType Type = COFF::IMAGE_COMDAT_SELECT_ANY;
+ if (getLexer().is(AsmToken::Identifier))
+ if (parseCOMDATType(Type))
+ return true;
+
+ const MCSectionCOFF *Current = static_cast<const MCSectionCOFF*>(
+ getStreamer().getCurrentSection().first);
+
+ if (Type == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE)
+ return Error(Loc, "cannot make section associative with .linkonce");
+
+ if (Current->getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT)
+ return Error(Loc, Twine("section '") + Current->getSectionName() +
+ "' is already linkonce");
+
+ Current->setSelection(Type);
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ return false;
+}
+
bool COFFAsmParser::ParseSEHDirectiveStartProc(StringRef, SMLoc) {
StringRef SymbolID;
if (getParser().parseIdentifier(SymbolID))
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
- MCSymbol *Symbol = getContext().GetOrCreateSymbol(SymbolID);
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
Lex();
- getStreamer().EmitWin64EHStartProc(Symbol);
+ getStreamer().EmitWinCFIStartProc(Symbol);
return false;
}
bool COFFAsmParser::ParseSEHDirectiveEndProc(StringRef, SMLoc) {
Lex();
- getStreamer().EmitWin64EHEndProc();
+ getStreamer().EmitWinCFIEndProc();
return false;
}
bool COFFAsmParser::ParseSEHDirectiveStartChained(StringRef, SMLoc) {
Lex();
- getStreamer().EmitWin64EHStartChained();
+ getStreamer().EmitWinCFIStartChained();
return false;
}
bool COFFAsmParser::ParseSEHDirectiveEndChained(StringRef, SMLoc) {
Lex();
- getStreamer().EmitWin64EHEndChained();
+ getStreamer().EmitWinCFIEndChained();
return false;
}
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
- MCSymbol *handler = getContext().GetOrCreateSymbol(SymbolID);
+ MCSymbol *handler = getContext().getOrCreateSymbol(SymbolID);
Lex();
- getStreamer().EmitWin64EHHandler(handler, unwind, except);
+ getStreamer().EmitWinEHHandler(handler, unwind, except);
return false;
}
bool COFFAsmParser::ParseSEHDirectiveHandlerData(StringRef, SMLoc) {
Lex();
- getStreamer().EmitWin64EHHandlerData();
+ getStreamer().EmitWinEHHandlerData();
return false;
}
bool COFFAsmParser::ParseSEHDirectivePushReg(StringRef, SMLoc L) {
- unsigned Reg;
+ unsigned Reg = 0;
if (ParseSEHRegisterNumber(Reg))
return true;
return TokError("unexpected token in directive");
Lex();
- getStreamer().EmitWin64EHPushReg(Reg);
+ getStreamer().EmitWinCFIPushReg(Reg);
return false;
}
bool COFFAsmParser::ParseSEHDirectiveSetFrame(StringRef, SMLoc L) {
- unsigned Reg;
+ unsigned Reg = 0;
int64_t Off;
if (ParseSEHRegisterNumber(Reg))
return true;
return TokError("unexpected token in directive");
Lex();
- getStreamer().EmitWin64EHSetFrame(Reg, Off);
+ getStreamer().EmitWinCFISetFrame(Reg, Off);
return false;
}
return TokError("unexpected token in directive");
Lex();
- getStreamer().EmitWin64EHAllocStack(Size);
+ getStreamer().EmitWinCFIAllocStack(Size);
return false;
}
bool COFFAsmParser::ParseSEHDirectiveSaveReg(StringRef, SMLoc L) {
- unsigned Reg;
+ unsigned Reg = 0;
int64_t Off;
if (ParseSEHRegisterNumber(Reg))
return true;
Lex();
// FIXME: Err on %xmm* registers
- getStreamer().EmitWin64EHSaveReg(Reg, Off);
+ getStreamer().EmitWinCFISaveReg(Reg, Off);
return false;
}
// FIXME: This method is inherently x86-specific. It should really be in the
// x86 backend.
bool COFFAsmParser::ParseSEHDirectiveSaveXMM(StringRef, SMLoc L) {
- unsigned Reg;
+ unsigned Reg = 0;
int64_t Off;
if (ParseSEHRegisterNumber(Reg))
return true;
Lex();
// FIXME: Err on non-%xmm* registers
- getStreamer().EmitWin64EHSaveXMM(Reg, Off);
+ getStreamer().EmitWinCFISaveXMM(Reg, Off);
return false;
}
return TokError("unexpected token in directive");
Lex();
- getStreamer().EmitWin64EHPushFrame(Code);
+ getStreamer().EmitWinCFIPushFrame(Code);
return false;
}
bool COFFAsmParser::ParseSEHDirectiveEndProlog(StringRef, SMLoc) {
Lex();
- getStreamer().EmitWin64EHEndProlog();
+ getStreamer().EmitWinCFIEndProlog();
return false;
}
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