//===----------------------------------------------------------------------===//
#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/MCRegisterInfo.h"
#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCTargetAsmParser.h"
#include "llvm/Support/COFF.h"
using namespace llvm;
AddDirectiveHandler<&COFFAsmParser::ParseDirectiveScl>(".scl");
AddDirectiveHandler<&COFFAsmParser::ParseDirectiveType>(".type");
AddDirectiveHandler<&COFFAsmParser::ParseDirectiveEndef>(".endef");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveSecRel32>(".secrel32");
+
+ // Win64 EH directives.
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartProc>(
+ ".seh_proc");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProc>(
+ ".seh_endproc");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartChained>(
+ ".seh_startchained");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndChained>(
+ ".seh_endchained");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandler>(
+ ".seh_handler");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandlerData>(
+ ".seh_handlerdata");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushReg>(
+ ".seh_pushreg");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSetFrame>(
+ ".seh_setframe");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveAllocStack>(
+ ".seh_stackalloc");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveReg>(
+ ".seh_savereg");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveXMM>(
+ ".seh_savexmm");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushFrame>(
+ ".seh_pushframe");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProlog>(
+ ".seh_endprologue");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveSymbolAttribute>(".weak");
}
bool ParseSectionDirectiveText(StringRef, SMLoc) {
bool ParseDirectiveScl(StringRef, SMLoc);
bool ParseDirectiveType(StringRef, SMLoc);
bool ParseDirectiveEndef(StringRef, SMLoc);
+ bool ParseDirectiveSecRel32(StringRef, SMLoc);
+
+ // Win64 EH directives.
+ bool ParseSEHDirectiveStartProc(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndProc(StringRef, SMLoc);
+ bool ParseSEHDirectiveStartChained(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndChained(StringRef, SMLoc);
+ bool ParseSEHDirectiveHandler(StringRef, SMLoc);
+ bool ParseSEHDirectiveHandlerData(StringRef, SMLoc);
+ bool ParseSEHDirectivePushReg(StringRef, SMLoc);
+ bool ParseSEHDirectiveSetFrame(StringRef, SMLoc);
+ bool ParseSEHDirectiveAllocStack(StringRef, SMLoc);
+ bool ParseSEHDirectiveSaveReg(StringRef, SMLoc);
+ bool ParseSEHDirectiveSaveXMM(StringRef, SMLoc);
+ bool ParseSEHDirectivePushFrame(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndProlog(StringRef, SMLoc);
+ bool ParseAtUnwindOrAtExcept(bool &unwind, bool &except);
+ bool ParseSEHRegisterNumber(unsigned &RegNo);
+ bool ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc);
public:
COFFAsmParser() {}
};
} // end annonomous namespace.
+/// ParseDirectiveSymbolAttribute
+/// ::= { ".weak", ... } [ identifier ( , identifier )* ]
+bool COFFAsmParser::ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc) {
+ MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Directive)
+ .Case(".weak", MCSA_Weak)
+ .Default(MCSA_Invalid);
+ assert(Attr != MCSA_Invalid && "unexpected symbol attribute directive!");
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ StringRef Name;
+
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
bool COFFAsmParser::ParseSectionSwitch(StringRef Section,
unsigned Characteristics,
SectionKind Kind) {
return false;
}
+bool COFFAsmParser::ParseDirectiveSecRel32(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().ParseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().GetOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitCOFFSecRel32(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveStartProc(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().ParseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().GetOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitWin64EHStartProc(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndProc(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHEndProc();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveStartChained(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHStartChained();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndChained(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHEndChained();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveHandler(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().ParseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify one or both of @unwind or @except");
+ Lex();
+ bool unwind = false, except = false;
+ if (ParseAtUnwindOrAtExcept(unwind, except))
+ return true;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ if (ParseAtUnwindOrAtExcept(unwind, except))
+ return true;
+ }
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *handler = getContext().GetOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitWin64EHHandler(handler, unwind, except);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveHandlerData(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHHandlerData();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectivePushReg(StringRef, SMLoc L) {
+ unsigned Reg;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHPushReg(Reg);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveSetFrame(StringRef, SMLoc L) {
+ unsigned Reg;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify a stack pointer offset");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Off))
+ return true;
+
+ if (Off & 0x0F)
+ return Error(startLoc, "offset is not a multiple of 16");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHSetFrame(Reg, Off);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveAllocStack(StringRef, SMLoc) {
+ int64_t Size;
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Size))
+ return true;
+
+ if (Size & 7)
+ return Error(startLoc, "size is not a multiple of 8");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHAllocStack(Size);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveSaveReg(StringRef, SMLoc L) {
+ unsigned Reg;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify an offset on the stack");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Off))
+ return true;
+
+ if (Off & 7)
+ return Error(startLoc, "size is not a multiple of 8");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ // FIXME: Err on %xmm* registers
+ getStreamer().EmitWin64EHSaveReg(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;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify an offset on the stack");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Off))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ if (Off & 0x0F)
+ return Error(startLoc, "offset is not a multiple of 16");
+
+ Lex();
+ // FIXME: Err on non-%xmm* registers
+ getStreamer().EmitWin64EHSaveXMM(Reg, Off);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectivePushFrame(StringRef, SMLoc) {
+ bool Code = false;
+ StringRef CodeID;
+ if (getLexer().is(AsmToken::At)) {
+ SMLoc startLoc = getLexer().getLoc();
+ Lex();
+ if (!getParser().ParseIdentifier(CodeID)) {
+ if (CodeID != "code")
+ return Error(startLoc, "expected @code");
+ Code = true;
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHPushFrame(Code);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndProlog(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHEndProlog();
+ return false;
+}
+
+bool COFFAsmParser::ParseAtUnwindOrAtExcept(bool &unwind, bool &except) {
+ StringRef identifier;
+ if (getLexer().isNot(AsmToken::At))
+ return TokError("a handler attribute must begin with '@'");
+ SMLoc startLoc = getLexer().getLoc();
+ Lex();
+ if (getParser().ParseIdentifier(identifier))
+ return Error(startLoc, "expected @unwind or @except");
+ if (identifier == "unwind")
+ unwind = true;
+ else if (identifier == "except")
+ except = true;
+ else
+ return Error(startLoc, "expected @unwind or @except");
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHRegisterNumber(unsigned &RegNo) {
+ SMLoc startLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Percent)) {
+ const MCRegisterInfo &MRI = getContext().getRegisterInfo();
+ SMLoc endLoc;
+ unsigned LLVMRegNo;
+ if (getParser().getTargetParser().ParseRegister(LLVMRegNo,startLoc,endLoc))
+ return true;
+
+#if 0
+ // FIXME: TargetAsmInfo::getCalleeSavedRegs() commits a serious layering
+ // violation so this validation code is disabled.
+
+ // Check that this is a non-volatile register.
+ const unsigned *NVRegs = TAI.getCalleeSavedRegs();
+ unsigned i;
+ for (i = 0; NVRegs[i] != 0; ++i)
+ if (NVRegs[i] == LLVMRegNo)
+ break;
+ if (NVRegs[i] == 0)
+ return Error(startLoc, "expected non-volatile register");
+#endif
+
+ int SEHRegNo = MRI.getSEHRegNum(LLVMRegNo);
+ if (SEHRegNo < 0)
+ return Error(startLoc,"register can't be represented in SEH unwind info");
+ RegNo = SEHRegNo;
+ }
+ else {
+ int64_t n;
+ if (getParser().ParseAbsoluteExpression(n))
+ return true;
+ if (n > 15)
+ return Error(startLoc, "register number is too high");
+ RegNo = n;
+ }
+
+ return false;
+}
+
namespace llvm {
MCAsmParserExtension *createCOFFAsmParser() {
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