//
//===----------------------------------------------------------------------===//
-#include "llvm/MC/MCParser/AsmParser.h"
+#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCParser/AsmCond.h"
+#include "llvm/MC/MCParser/AsmLexer.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Support/SourceMgr.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetAsmParser.h"
+#include <cctype>
+#include <vector>
using namespace llvm;
+static cl::opt<bool>
+FatalAssemblerWarnings("fatal-assembler-warnings",
+ cl::desc("Consider warnings as error"));
namespace {
+/// \brief Helper class for tracking macro definitions.
+typedef std::vector<AsmToken> MacroArgument;
+
+struct Macro {
+ StringRef Name;
+ StringRef Body;
+ std::vector<StringRef> Parameters;
+
+public:
+ Macro(StringRef N, StringRef B, const std::vector<StringRef> &P) :
+ Name(N), Body(B), Parameters(P) {}
+};
+
+/// \brief Helper class for storing information about an active macro
+/// instantiation.
+struct MacroInstantiation {
+ /// The macro being instantiated.
+ const Macro *TheMacro;
+
+ /// The macro instantiation with substitutions.
+ MemoryBuffer *Instantiation;
+
+ /// The location of the instantiation.
+ SMLoc InstantiationLoc;
+
+ /// The location where parsing should resume upon instantiation completion.
+ SMLoc ExitLoc;
+
+public:
+ MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL,
+ MemoryBuffer *I);
+};
+
+/// \brief The concrete assembly parser instance.
+class AsmParser : public MCAsmParser {
+ friend class GenericAsmParser;
+
+ AsmParser(const AsmParser &); // DO NOT IMPLEMENT
+ void operator=(const AsmParser &); // DO NOT IMPLEMENT
+private:
+ AsmLexer Lexer;
+ MCContext &Ctx;
+ MCStreamer &Out;
+ const MCAsmInfo &MAI;
+ SourceMgr &SrcMgr;
+ SourceMgr::DiagHandlerTy SavedDiagHandler;
+ void *SavedDiagContext;
+ MCAsmParserExtension *GenericParser;
+ MCAsmParserExtension *PlatformParser;
+
+ /// This is the current buffer index we're lexing from as managed by the
+ /// SourceMgr object.
+ int CurBuffer;
+
+ AsmCond TheCondState;
+ std::vector<AsmCond> TheCondStack;
+
+ /// DirectiveMap - This is a table handlers for directives. Each handler is
+ /// invoked after the directive identifier is read and is responsible for
+ /// parsing and validating the rest of the directive. The handler is passed
+ /// in the directive name and the location of the directive keyword.
+ StringMap<std::pair<MCAsmParserExtension*, DirectiveHandler> > DirectiveMap;
+
+ /// MacroMap - Map of currently defined macros.
+ StringMap<Macro*> MacroMap;
+
+ /// ActiveMacros - Stack of active macro instantiations.
+ std::vector<MacroInstantiation*> ActiveMacros;
+
+ /// Boolean tracking whether macro substitution is enabled.
+ unsigned MacrosEnabled : 1;
+
+ /// Flag tracking whether any errors have been encountered.
+ unsigned HadError : 1;
+
+ /// The values from the last parsed cpp hash file line comment if any.
+ StringRef CppHashFilename;
+ int64_t CppHashLineNumber;
+ SMLoc CppHashLoc;
+
+ /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
+ unsigned AssemblerDialect;
+
+public:
+ AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
+ const MCAsmInfo &MAI);
+ ~AsmParser();
+
+ virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false);
+
+ void AddDirectiveHandler(MCAsmParserExtension *Object,
+ StringRef Directive,
+ DirectiveHandler Handler) {
+ DirectiveMap[Directive] = std::make_pair(Object, Handler);
+ }
+
+public:
+ /// @name MCAsmParser Interface
+ /// {
+
+ virtual SourceMgr &getSourceManager() { return SrcMgr; }
+ virtual MCAsmLexer &getLexer() { return Lexer; }
+ virtual MCContext &getContext() { return Ctx; }
+ virtual MCStreamer &getStreamer() { return Out; }
+ virtual unsigned getAssemblerDialect() {
+ if (AssemblerDialect == ~0U)
+ return MAI.getAssemblerDialect();
+ else
+ return AssemblerDialect;
+ }
+ virtual void setAssemblerDialect(unsigned i) {
+ AssemblerDialect = i;
+ }
+
+ virtual bool Warning(SMLoc L, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = ArrayRef<SMRange>());
+ virtual bool Error(SMLoc L, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = ArrayRef<SMRange>());
+
+ const AsmToken &Lex();
+
+ bool ParseExpression(const MCExpr *&Res);
+ virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc);
+ virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc);
+ virtual bool ParseAbsoluteExpression(int64_t &Res);
+
+ /// }
+
+private:
+ void CheckForValidSection();
+
+ bool ParseStatement();
+ void EatToEndOfLine();
+ bool ParseCppHashLineFilenameComment(const SMLoc &L);
+
+ bool HandleMacroEntry(StringRef Name, SMLoc NameLoc, const Macro *M);
+ bool expandMacro(raw_svector_ostream &OS, StringRef Body,
+ const std::vector<StringRef> &Parameters,
+ const std::vector<MacroArgument> &A,
+ const SMLoc &L);
+ void HandleMacroExit();
+
+ void PrintMacroInstantiations();
+ void PrintMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = ArrayRef<SMRange>()) const {
+ SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
+ }
+ static void DiagHandler(const SMDiagnostic &Diag, void *Context);
+
+ /// EnterIncludeFile - Enter the specified file. This returns true on failure.
+ bool EnterIncludeFile(const std::string &Filename);
+ /// ProcessIncbinFile - Process the specified file for the .incbin directive.
+ /// This returns true on failure.
+ bool ProcessIncbinFile(const std::string &Filename);
+
+ /// \brief Reset the current lexer position to that given by \arg Loc. The
+ /// current token is not set; clients should ensure Lex() is called
+ /// subsequently.
+ void JumpToLoc(SMLoc Loc);
+
+ void EatToEndOfStatement();
+
+ /// \brief Parse up to the end of statement and a return the contents from the
+ /// current token until the end of the statement; the current token on exit
+ /// will be either the EndOfStatement or EOF.
+ StringRef ParseStringToEndOfStatement();
+
+ /// \brief Parse until the end of a statement or a comma is encountered,
+ /// return the contents from the current token up to the end or comma.
+ StringRef ParseStringToComma();
+
+ bool ParseAssignment(StringRef Name, bool allow_redef);
+
+ bool ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
+
+ /// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
+ /// and set \arg Res to the identifier contents.
+ bool ParseIdentifier(StringRef &Res);
+
+ // Directive Parsing.
+
+ // ".ascii", ".asciiz", ".string"
+ bool ParseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
+ bool ParseDirectiveValue(unsigned Size); // ".byte", ".long", ...
+ bool ParseDirectiveRealValue(const fltSemantics &); // ".single", ...
+ bool ParseDirectiveFill(); // ".fill"
+ bool ParseDirectiveSpace(); // ".space"
+ bool ParseDirectiveZero(); // ".zero"
+ bool ParseDirectiveSet(StringRef IDVal, bool allow_redef); // ".set", ".equ", ".equiv"
+ bool ParseDirectiveOrg(); // ".org"
+ // ".align{,32}", ".p2align{,w,l}"
+ bool ParseDirectiveAlign(bool IsPow2, unsigned ValueSize);
+
+ /// ParseDirectiveSymbolAttribute - Parse a directive like ".globl" which
+ /// accepts a single symbol (which should be a label or an external).
+ bool ParseDirectiveSymbolAttribute(MCSymbolAttr Attr);
+
+ bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
+
+ bool ParseDirectiveAbort(); // ".abort"
+ bool ParseDirectiveInclude(); // ".include"
+ bool ParseDirectiveIncbin(); // ".incbin"
+
+ bool ParseDirectiveIf(SMLoc DirectiveLoc); // ".if"
+ // ".ifb" or ".ifnb", depending on ExpectBlank.
+ bool ParseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
+ // ".ifc" or ".ifnc", depending on ExpectEqual.
+ bool ParseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
+ // ".ifdef" or ".ifndef", depending on expect_defined
+ bool ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
+ bool ParseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
+ bool ParseDirectiveElse(SMLoc DirectiveLoc); // ".else"
+ bool ParseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
+
+ /// ParseEscapedString - Parse the current token as a string which may include
+ /// escaped characters and return the string contents.
+ bool ParseEscapedString(std::string &Data);
+
+ const MCExpr *ApplyModifierToExpr(const MCExpr *E,
+ MCSymbolRefExpr::VariantKind Variant);
+
+ // Macro-like directives
+ Macro *ParseMacroLikeBody(SMLoc DirectiveLoc);
+ void InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS);
+ bool ParseDirectiveRept(SMLoc DirectiveLoc); // ".rept"
+ bool ParseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
+};
+
/// \brief Generic implementations of directive handling, etc. which is shared
/// (or the default, at least) for all assembler parser.
class GenericAsmParser : public MCAsmParserExtension {
+ template<bool (GenericAsmParser::*Handler)(StringRef, SMLoc)>
+ void AddDirectiveHandler(StringRef Directive) {
+ getParser().AddDirectiveHandler(this, Directive,
+ HandleDirective<GenericAsmParser, Handler>);
+ }
public:
GenericAsmParser() {}
+ AsmParser &getParser() {
+ return (AsmParser&) this->MCAsmParserExtension::getParser();
+ }
+
virtual void Initialize(MCAsmParser &Parser) {
// Call the base implementation.
this->MCAsmParserExtension::Initialize(Parser);
// Debugging directives.
- Parser.AddDirectiveHandler(this, ".file", MCAsmParser::DirectiveHandler(
- &GenericAsmParser::ParseDirectiveFile));
- Parser.AddDirectiveHandler(this, ".line", MCAsmParser::DirectiveHandler(
- &GenericAsmParser::ParseDirectiveLine));
- Parser.AddDirectiveHandler(this, ".loc", MCAsmParser::DirectiveHandler(
- &GenericAsmParser::ParseDirectiveLoc));
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveFile>(".file");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLine>(".line");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLoc>(".loc");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveStabs>(".stabs");
+
+ // CFI directives.
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFISections>(
+ ".cfi_sections");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIStartProc>(
+ ".cfi_startproc");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIEndProc>(
+ ".cfi_endproc");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfa>(
+ ".cfi_def_cfa");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaOffset>(
+ ".cfi_def_cfa_offset");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset>(
+ ".cfi_adjust_cfa_offset");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaRegister>(
+ ".cfi_def_cfa_register");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIOffset>(
+ ".cfi_offset");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIRelOffset>(
+ ".cfi_rel_offset");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_personality");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_lsda");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIRememberState>(".cfi_remember_state");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIRestoreState>(".cfi_restore_state");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFISameValue>(".cfi_same_value");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIRestore>(".cfi_restore");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIEscape>(".cfi_escape");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFISignalFrame>(".cfi_signal_frame");
+
+ // Macro directives.
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
+ ".macros_on");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
+ ".macros_off");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacro>(".macro");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endm");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endmacro");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectivePurgeMacro>(".purgem");
+
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".sleb128");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".uleb128");
}
- bool ParseDirectiveFile(StringRef, SMLoc DirectiveLoc); // ".file"
- bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc); // ".line"
- bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc); // ".loc"
+ bool ParseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
+
+ bool ParseDirectiveFile(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveStabs(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISections(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIStartProc(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIDefCfa(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIDefCfaOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIAdjustCfaOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIDefCfaRegister(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRelOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIPersonalityOrLsda(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRememberState(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRestoreState(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISameValue(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRestore(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIEscape(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISignalFrame(StringRef, SMLoc DirectiveLoc);
+
+ bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveEndMacro(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectivePurgeMacro(StringRef, SMLoc DirectiveLoc);
+
+ bool ParseDirectiveLEB128(StringRef, SMLoc);
};
-/// \brief Implementation of directive handling which is shared across all
-/// Darwin targets.
-class DarwinAsmParser : public MCAsmParserExtension {
-public:
- DarwinAsmParser() {}
+}
- virtual void Initialize(MCAsmParser &Parser) {
- // Call the base implementation.
- this->MCAsmParserExtension::Initialize(Parser);
+namespace llvm {
- Parser.AddDirectiveHandler(this, ".desc", MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveDesc));
- Parser.AddDirectiveHandler(this, ".lsym", MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveLsym));
- Parser.AddDirectiveHandler(this, ".subsections_via_symbols",
- MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveSubsectionsViaSymbols));
- Parser.AddDirectiveHandler(this, ".dump", MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveDumpOrLoad));
- Parser.AddDirectiveHandler(this, ".load", MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveDumpOrLoad));
- Parser.AddDirectiveHandler(this, ".secure_log_unique",
- MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveSecureLogUnique));
- Parser.AddDirectiveHandler(this, ".secure_log_reset",
- MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveSecureLogReset));
- Parser.AddDirectiveHandler(this, ".tbss",
- MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveTBSS));
- Parser.AddDirectiveHandler(this, ".zerofill",
- MCAsmParser::DirectiveHandler(
- &DarwinAsmParser::ParseDirectiveZerofill));
- }
-
- bool ParseDirectiveDesc(StringRef, SMLoc);
- bool ParseDirectiveDumpOrLoad(StringRef, SMLoc);
- bool ParseDirectiveLsym(StringRef, SMLoc);
- bool ParseDirectiveSecureLogReset(StringRef, SMLoc);
- bool ParseDirectiveSecureLogUnique(StringRef, SMLoc);
- bool ParseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
- bool ParseDirectiveTBSS(StringRef, SMLoc);
- bool ParseDirectiveZerofill(StringRef, SMLoc);
-};
+extern MCAsmParserExtension *createDarwinAsmParser();
+extern MCAsmParserExtension *createELFAsmParser();
+extern MCAsmParserExtension *createCOFFAsmParser();
}
enum { DEFAULT_ADDRSPACE = 0 };
-AsmParser::AsmParser(const Target &T, SourceMgr &_SM, MCContext &_Ctx,
+AsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx,
MCStreamer &_Out, const MCAsmInfo &_MAI)
- : Lexer(_MAI), Ctx(_Ctx), Out(_Out), SrcMgr(_SM),
+ : Lexer(_MAI), Ctx(_Ctx), Out(_Out), MAI(_MAI), SrcMgr(_SM),
GenericParser(new GenericAsmParser), PlatformParser(0),
- TargetParser(0), CurBuffer(0) {
+ CurBuffer(0), MacrosEnabled(true), CppHashLineNumber(0),
+ AssemblerDialect(~0U) {
+ // Save the old handler.
+ SavedDiagHandler = SrcMgr.getDiagHandler();
+ SavedDiagContext = SrcMgr.getDiagContext();
+ // Set our own handler which calls the saved handler.
+ SrcMgr.setDiagHandler(DiagHandler, this);
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
// Initialize the generic parser.
//
// FIXME: This is a hack, we need to (majorly) cleanup how these objects are
// created.
- if (_MAI.hasSubsectionsViaSymbols()) {
- PlatformParser = new DarwinAsmParser;
+ if (_MAI.hasMicrosoftFastStdCallMangling()) {
+ PlatformParser = createCOFFAsmParser();
+ PlatformParser->Initialize(*this);
+ } else if (_MAI.hasSubsectionsViaSymbols()) {
+ PlatformParser = createDarwinAsmParser();
+ PlatformParser->Initialize(*this);
+ } else {
+ PlatformParser = createELFAsmParser();
PlatformParser->Initialize(*this);
}
}
AsmParser::~AsmParser() {
+ assert(ActiveMacros.empty() && "Unexpected active macro instantiation!");
+
+ // Destroy any macros.
+ for (StringMap<Macro*>::iterator it = MacroMap.begin(),
+ ie = MacroMap.end(); it != ie; ++it)
+ delete it->getValue();
+
delete PlatformParser;
delete GenericParser;
}
-void AsmParser::setTargetParser(TargetAsmParser &P) {
- assert(!TargetParser && "Target parser is already initialized!");
- TargetParser = &P;
- TargetParser->Initialize(*this);
+void AsmParser::PrintMacroInstantiations() {
+ // Print the active macro instantiation stack.
+ for (std::vector<MacroInstantiation*>::const_reverse_iterator
+ it = ActiveMacros.rbegin(), ie = ActiveMacros.rend(); it != ie; ++it)
+ PrintMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
+ "while in macro instantiation");
}
-void AsmParser::Warning(SMLoc L, const Twine &Msg) {
- PrintMessage(L, Msg.str(), "warning");
+bool AsmParser::Warning(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ if (FatalAssemblerWarnings)
+ return Error(L, Msg, Ranges);
+ PrintMessage(L, SourceMgr::DK_Warning, Msg, Ranges);
+ PrintMacroInstantiations();
+ return false;
}
-bool AsmParser::Error(SMLoc L, const Twine &Msg) {
- PrintMessage(L, Msg.str(), "error");
+bool AsmParser::Error(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ HadError = true;
+ PrintMessage(L, SourceMgr::DK_Error, Msg, Ranges);
+ PrintMacroInstantiations();
return true;
}
-void AsmParser::PrintMessage(SMLoc Loc, const std::string &Msg,
- const char *Type) const {
- SrcMgr.PrintMessage(Loc, Msg, Type);
-}
-
bool AsmParser::EnterIncludeFile(const std::string &Filename) {
- int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc());
+ std::string IncludedFile;
+ int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
if (NewBuf == -1)
return true;
-
+
CurBuffer = NewBuf;
-
+
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
-
+
+ return false;
+}
+
+/// Process the specified .incbin file by seaching for it in the include paths
+/// then just emitting the byte contents of the file to the streamer. This
+/// returns true on failure.
+bool AsmParser::ProcessIncbinFile(const std::string &Filename) {
+ std::string IncludedFile;
+ int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
+ if (NewBuf == -1)
+ return true;
+
+ // Pick up the bytes from the file and emit them.
+ getStreamer().EmitBytes(SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(),
+ DEFAULT_ADDRSPACE);
return false;
}
-
+
+void AsmParser::JumpToLoc(SMLoc Loc) {
+ CurBuffer = SrcMgr.FindBufferContainingLoc(Loc);
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer), Loc.getPointer());
+}
+
const AsmToken &AsmParser::Lex() {
const AsmToken *tok = &Lexer.Lex();
-
+
if (tok->is(AsmToken::Eof)) {
// If this is the end of an included file, pop the parent file off the
// include stack.
SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
if (ParentIncludeLoc != SMLoc()) {
- CurBuffer = SrcMgr.FindBufferContainingLoc(ParentIncludeLoc);
- Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer),
- ParentIncludeLoc.getPointer());
+ JumpToLoc(ParentIncludeLoc);
tok = &Lexer.Lex();
}
}
-
+
if (tok->is(AsmToken::Error))
- PrintMessage(Lexer.getErrLoc(), Lexer.getErr(), "error");
-
+ Error(Lexer.getErrLoc(), Lexer.getErr());
+
return *tok;
}
bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
// Create the initial section, if requested.
- //
- // FIXME: Target hook & command line option for initial section.
if (!NoInitialTextSection)
- Out.SwitchSection(Ctx.getMachOSection("__TEXT", "__text",
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- 0, SectionKind::getText()));
+ Out.InitSections();
// Prime the lexer.
Lex();
-
- bool HadError = false;
-
+
+ HadError = false;
AsmCond StartingCondState = TheCondState;
+ // If we are generating dwarf for assembly source files save the initial text
+ // section and generate a .file directive.
+ if (getContext().getGenDwarfForAssembly()) {
+ getContext().setGenDwarfSection(getStreamer().getCurrentSection());
+ MCSymbol *SectionStartSym = getContext().CreateTempSymbol();
+ getStreamer().EmitLabel(SectionStartSym);
+ getContext().setGenDwarfSectionStartSym(SectionStartSym);
+ getStreamer().EmitDwarfFileDirective(getContext().nextGenDwarfFileNumber(),
+ StringRef(), SrcMgr.getMemoryBuffer(CurBuffer)->getBufferIdentifier());
+ }
+
// While we have input, parse each statement.
while (Lexer.isNot(AsmToken::Eof)) {
if (!ParseStatement()) continue;
-
- // We had an error, remember it and recover by skipping to the next line.
- HadError = true;
+
+ // We had an error, validate that one was emitted and recover by skipping to
+ // the next line.
+ assert(HadError && "Parse statement returned an error, but none emitted!");
EatToEndOfStatement();
}
if (TheCondState.TheCond != StartingCondState.TheCond ||
TheCondState.Ignore != StartingCondState.Ignore)
return TokError("unmatched .ifs or .elses");
-
+
+ // Check to see there are no empty DwarfFile slots.
+ const std::vector<MCDwarfFile *> &MCDwarfFiles =
+ getContext().getMCDwarfFiles();
+ for (unsigned i = 1; i < MCDwarfFiles.size(); i++) {
+ if (!MCDwarfFiles[i])
+ TokError("unassigned file number: " + Twine(i) + " for .file directives");
+ }
+
+ // Check to see that all assembler local symbols were actually defined.
+ // Targets that don't do subsections via symbols may not want this, though,
+ // so conservatively exclude them. Only do this if we're finalizing, though,
+ // as otherwise we won't necessarilly have seen everything yet.
+ if (!NoFinalize && MAI.hasSubsectionsViaSymbols()) {
+ const MCContext::SymbolTable &Symbols = getContext().getSymbols();
+ for (MCContext::SymbolTable::const_iterator i = Symbols.begin(),
+ e = Symbols.end();
+ i != e; ++i) {
+ MCSymbol *Sym = i->getValue();
+ // Variable symbols may not be marked as defined, so check those
+ // explicitly. If we know it's a variable, we have a definition for
+ // the purposes of this check.
+ if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
+ // FIXME: We would really like to refer back to where the symbol was
+ // first referenced for a source location. We need to add something
+ // to track that. Currently, we just point to the end of the file.
+ PrintMessage(getLexer().getLoc(), SourceMgr::DK_Error,
+ "assembler local symbol '" + Sym->getName() +
+ "' not defined");
+ }
+ }
+
+
// Finalize the output stream if there are no errors and if the client wants
// us to.
- if (!HadError && !NoFinalize)
+ if (!HadError && !NoFinalize)
Out.Finish();
return HadError;
}
+void AsmParser::CheckForValidSection() {
+ if (!getStreamer().getCurrentSection()) {
+ TokError("expected section directive before assembly directive");
+ Out.SwitchSection(Ctx.getMachOSection(
+ "__TEXT", "__text",
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 0, SectionKind::getText()));
+ }
+}
+
/// EatToEndOfStatement - Throw away the rest of the line for testing purposes.
void AsmParser::EatToEndOfStatement() {
while (Lexer.isNot(AsmToken::EndOfStatement) &&
Lexer.isNot(AsmToken::Eof))
Lex();
-
+
// Eat EOL.
if (Lexer.is(AsmToken::EndOfStatement))
Lex();
}
+StringRef AsmParser::ParseStringToEndOfStatement() {
+ const char *Start = getTok().getLoc().getPointer();
+
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ const char *End = getTok().getLoc().getPointer();
+ return StringRef(Start, End - Start);
+}
+
+StringRef AsmParser::ParseStringToComma() {
+ const char *Start = getTok().getLoc().getPointer();
+
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Comma) &&
+ Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ const char *End = getTok().getLoc().getPointer();
+ return StringRef(Start, End - Start);
+}
/// ParseParenExpr - Parse a paren expression and return it.
/// NOTE: This assumes the leading '(' has already been consumed.
return false;
}
-MCSymbol *AsmParser::CreateSymbol(StringRef Name) {
- // FIXME: Inline into callers.
- return Ctx.GetOrCreateSymbol(Name);
+/// ParseBracketExpr - Parse a bracket expression and return it.
+/// NOTE: This assumes the leading '[' has already been consumed.
+///
+/// bracketexpr ::= expr]
+///
+bool AsmParser::ParseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
+ if (ParseExpression(Res)) return true;
+ if (Lexer.isNot(AsmToken::RBrac))
+ return TokError("expected ']' in brackets expression");
+ EndLoc = Lexer.getLoc();
+ Lex();
+ return false;
}
/// ParsePrimaryExpr - Parse a primary expression and return it.
switch (Lexer.getKind()) {
default:
return TokError("unknown token in expression");
+ // If we have an error assume that we've already handled it.
+ case AsmToken::Error:
+ return true;
case AsmToken::Exclaim:
Lex(); // Eat the operator.
if (ParsePrimaryExpr(Res, EndLoc))
return true;
Res = MCUnaryExpr::CreateLNot(Res, getContext());
return false;
+ case AsmToken::Dollar:
case AsmToken::String:
case AsmToken::Identifier: {
- // This is a symbol reference.
- std::pair<StringRef, StringRef> Split = getTok().getIdentifier().split('@');
- MCSymbol *Sym = CreateSymbol(Split.first);
+ EndLoc = Lexer.getLoc();
+
+ StringRef Identifier;
+ if (ParseIdentifier(Identifier))
+ return true;
- // Mark the symbol as used in an expression.
- Sym->setUsedInExpr(true);
+ // This is a symbol reference.
+ std::pair<StringRef, StringRef> Split = Identifier.split('@');
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Split.first);
// Lookup the symbol variant if used.
MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
- if (Split.first.size() != getTok().getIdentifier().size())
+ if (Split.first.size() != Identifier.size()) {
Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
-
- EndLoc = Lexer.getLoc();
- Lex(); // Eat identifier.
+ if (Variant == MCSymbolRefExpr::VK_Invalid) {
+ Variant = MCSymbolRefExpr::VK_None;
+ return TokError("invalid variant '" + Split.second + "'");
+ }
+ }
// If this is an absolute variable reference, substitute it now to preserve
// semantics in the face of reassignment.
if (Sym->isVariable() && isa<MCConstantExpr>(Sym->getVariableValue())) {
if (Variant)
- return Error(EndLoc, "unexpected modified on variable reference");
+ return Error(EndLoc, "unexpected modifier on variable reference");
Res = Sym->getVariableValue();
return false;
IDVal == "f" ? 1 : 0);
Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
getContext());
- if(IDVal == "b" && Sym->isUndefined())
+ if (IDVal == "b" && Sym->isUndefined())
return Error(Loc, "invalid reference to undefined symbol");
EndLoc = Lexer.getLoc();
Lex(); // Eat identifier.
}
return false;
}
+ case AsmToken::Real: {
+ APFloat RealVal(APFloat::IEEEdouble, getTok().getString());
+ uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
+ Res = MCConstantExpr::Create(IntVal, getContext());
+ Lex(); // Eat token.
+ return false;
+ }
case AsmToken::Dot: {
// This is a '.' reference, which references the current PC. Emit a
// temporary label to the streamer and refer to it.
Lex(); // Eat identifier.
return false;
}
-
case AsmToken::LParen:
Lex(); // Eat the '('.
return ParseParenExpr(Res, EndLoc);
+ case AsmToken::LBrac:
+ if (!PlatformParser->HasBracketExpressions())
+ return TokError("brackets expression not supported on this target");
+ Lex(); // Eat the '['.
+ return ParseBracketExpr(Res, EndLoc);
case AsmToken::Minus:
Lex(); // Eat the operator.
if (ParsePrimaryExpr(Res, EndLoc))
return ParseExpression(Res, EndLoc);
}
+const MCExpr *
+AsmParser::ApplyModifierToExpr(const MCExpr *E,
+ MCSymbolRefExpr::VariantKind Variant) {
+ // Recurse over the given expression, rebuilding it to apply the given variant
+ // if there is exactly one symbol.
+ switch (E->getKind()) {
+ case MCExpr::Target:
+ case MCExpr::Constant:
+ return 0;
+
+ case MCExpr::SymbolRef: {
+ const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
+
+ if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
+ TokError("invalid variant on expression '" +
+ getTok().getIdentifier() + "' (already modified)");
+ return E;
+ }
+
+ return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
+ }
+
+ case MCExpr::Unary: {
+ const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
+ const MCExpr *Sub = ApplyModifierToExpr(UE->getSubExpr(), Variant);
+ if (!Sub)
+ return 0;
+ return MCUnaryExpr::Create(UE->getOpcode(), Sub, getContext());
+ }
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
+ const MCExpr *LHS = ApplyModifierToExpr(BE->getLHS(), Variant);
+ const MCExpr *RHS = ApplyModifierToExpr(BE->getRHS(), Variant);
+
+ if (!LHS && !RHS)
+ return 0;
+
+ if (!LHS) LHS = BE->getLHS();
+ if (!RHS) RHS = BE->getRHS();
+
+ return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
+ }
+ }
+
+ llvm_unreachable("Invalid expression kind!");
+}
+
/// ParseExpression - Parse an expression and return it.
-///
-/// expr ::= expr +,- expr -> lowest.
-/// expr ::= expr |,^,&,! expr -> middle.
-/// expr ::= expr *,/,%,<<,>> expr -> highest.
+///
+/// expr ::= expr &&,|| expr -> lowest.
+/// expr ::= expr |,^,&,! expr
+/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
+/// expr ::= expr <<,>> expr
+/// expr ::= expr +,- expr
+/// expr ::= expr *,/,% expr -> highest.
/// expr ::= primaryexpr
///
bool AsmParser::ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
if (ParsePrimaryExpr(Res, EndLoc) || ParseBinOpRHS(1, Res, EndLoc))
return true;
+ // As a special case, we support 'a op b @ modifier' by rewriting the
+ // expression to include the modifier. This is inefficient, but in general we
+ // expect users to use 'a@modifier op b'.
+ if (Lexer.getKind() == AsmToken::At) {
+ Lex();
+
+ if (Lexer.isNot(AsmToken::Identifier))
+ return TokError("unexpected symbol modifier following '@'");
+
+ MCSymbolRefExpr::VariantKind Variant =
+ MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
+ if (Variant == MCSymbolRefExpr::VK_Invalid)
+ return TokError("invalid variant '" + getTok().getIdentifier() + "'");
+
+ const MCExpr *ModifiedRes = ApplyModifierToExpr(Res, Variant);
+ if (!ModifiedRes) {
+ return TokError("invalid modifier '" + getTok().getIdentifier() +
+ "' (no symbols present)");
+ }
+
+ Res = ModifiedRes;
+ Lex();
+ }
+
// Try to constant fold it up front, if possible.
int64_t Value;
if (Res->EvaluateAsAbsolute(Value))
bool AsmParser::ParseAbsoluteExpression(int64_t &Res) {
const MCExpr *Expr;
-
+
SMLoc StartLoc = Lexer.getLoc();
if (ParseExpression(Expr))
return true;
return false;
}
-static unsigned getBinOpPrecedence(AsmToken::TokenKind K,
+static unsigned getBinOpPrecedence(AsmToken::TokenKind K,
MCBinaryExpr::Opcode &Kind) {
switch (K) {
default:
Kind = MCBinaryExpr::LOr;
return 1;
- // Low Precedence: +, -, ==, !=, <>, <, <=, >, >=
- case AsmToken::Plus:
- Kind = MCBinaryExpr::Add;
+
+ // Low Precedence: |, &, ^
+ //
+ // FIXME: gas seems to support '!' as an infix operator?
+ case AsmToken::Pipe:
+ Kind = MCBinaryExpr::Or;
return 2;
- case AsmToken::Minus:
- Kind = MCBinaryExpr::Sub;
+ case AsmToken::Caret:
+ Kind = MCBinaryExpr::Xor;
+ return 2;
+ case AsmToken::Amp:
+ Kind = MCBinaryExpr::And;
return 2;
+
+ // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
case AsmToken::EqualEqual:
Kind = MCBinaryExpr::EQ;
- return 2;
+ return 3;
case AsmToken::ExclaimEqual:
case AsmToken::LessGreater:
Kind = MCBinaryExpr::NE;
- return 2;
+ return 3;
case AsmToken::Less:
Kind = MCBinaryExpr::LT;
- return 2;
+ return 3;
case AsmToken::LessEqual:
Kind = MCBinaryExpr::LTE;
- return 2;
+ return 3;
case AsmToken::Greater:
Kind = MCBinaryExpr::GT;
- return 2;
+ return 3;
case AsmToken::GreaterEqual:
Kind = MCBinaryExpr::GTE;
- return 2;
-
- // Intermediate Precedence: |, &, ^
- //
- // FIXME: gas seems to support '!' as an infix operator?
- case AsmToken::Pipe:
- Kind = MCBinaryExpr::Or;
- return 3;
- case AsmToken::Caret:
- Kind = MCBinaryExpr::Xor;
- return 3;
- case AsmToken::Amp:
- Kind = MCBinaryExpr::And;
return 3;
- // Highest Precedence: *, /, %, <<, >>
- case AsmToken::Star:
- Kind = MCBinaryExpr::Mul;
- return 4;
- case AsmToken::Slash:
- Kind = MCBinaryExpr::Div;
- return 4;
- case AsmToken::Percent:
- Kind = MCBinaryExpr::Mod;
- return 4;
+ // Intermediate Precedence: <<, >>
case AsmToken::LessLess:
Kind = MCBinaryExpr::Shl;
return 4;
case AsmToken::GreaterGreater:
Kind = MCBinaryExpr::Shr;
return 4;
+
+ // High Intermediate Precedence: +, -
+ case AsmToken::Plus:
+ Kind = MCBinaryExpr::Add;
+ return 5;
+ case AsmToken::Minus:
+ Kind = MCBinaryExpr::Sub;
+ return 5;
+
+ // Highest Precedence: *, /, %
+ case AsmToken::Star:
+ Kind = MCBinaryExpr::Mul;
+ return 6;
+ case AsmToken::Slash:
+ Kind = MCBinaryExpr::Div;
+ return 6;
+ case AsmToken::Percent:
+ Kind = MCBinaryExpr::Mod;
+ return 6;
}
}
while (1) {
MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
-
+
// If the next token is lower precedence than we are allowed to eat, return
// successfully with what we ate already.
if (TokPrec < Precedence)
return false;
-
+
Lex();
-
+
// Eat the next primary expression.
const MCExpr *RHS;
if (ParsePrimaryExpr(RHS, EndLoc)) return true;
-
+
// If BinOp binds less tightly with RHS than the operator after RHS, let
// the pending operator take RHS as its LHS.
MCBinaryExpr::Opcode Dummy;
}
}
-
-
-
+
+
+
/// ParseStatement:
/// ::= EndOfStatement
/// ::= Label* Directive ...Operands... EndOfStatement
return false;
}
- // Statements always start with an identifier.
+ // Statements always start with an identifier or are a full line comment.
AsmToken ID = getTok();
SMLoc IDLoc = ID.getLoc();
StringRef IDVal;
int64_t LocalLabelVal = -1;
- // GUESS allow an integer followed by a ':' as a directional local label
+ // A full line comment is a '#' as the first token.
+ if (Lexer.is(AsmToken::Hash))
+ return ParseCppHashLineFilenameComment(IDLoc);
+
+ // Allow an integer followed by a ':' as a directional local label.
if (Lexer.is(AsmToken::Integer)) {
LocalLabelVal = getTok().getIntVal();
if (LocalLabelVal < 0) {
return TokError("unexpected token at start of statement");
}
}
- }
- else if (ParseIdentifier(IDVal)) {
+
+ } else if (Lexer.is(AsmToken::Dot)) {
+ // Treat '.' as a valid identifier in this context.
+ Lex();
+ IDVal = ".";
+
+ } else if (ParseIdentifier(IDVal)) {
if (!TheCondState.Ignore)
return TokError("unexpected token at start of statement");
IDVal = "";
}
+
// Handle conditional assembly here before checking for skipping. We
// have to do this so that .endif isn't skipped in a ".if 0" block for
// example.
if (IDVal == ".if")
return ParseDirectiveIf(IDLoc);
+ if (IDVal == ".ifb")
+ return ParseDirectiveIfb(IDLoc, true);
+ if (IDVal == ".ifnb")
+ return ParseDirectiveIfb(IDLoc, false);
+ if (IDVal == ".ifc")
+ return ParseDirectiveIfc(IDLoc, true);
+ if (IDVal == ".ifnc")
+ return ParseDirectiveIfc(IDLoc, false);
+ if (IDVal == ".ifdef")
+ return ParseDirectiveIfdef(IDLoc, true);
+ if (IDVal == ".ifndef" || IDVal == ".ifnotdef")
+ return ParseDirectiveIfdef(IDLoc, false);
if (IDVal == ".elseif")
return ParseDirectiveElseIf(IDLoc);
if (IDVal == ".else")
return ParseDirectiveElse(IDLoc);
if (IDVal == ".endif")
return ParseDirectiveEndIf(IDLoc);
-
+
// If we are in a ".if 0" block, ignore this statement.
if (TheCondState.Ignore) {
EatToEndOfStatement();
return false;
}
-
+
// FIXME: Recurse on local labels?
// See what kind of statement we have.
switch (Lexer.getKind()) {
case AsmToken::Colon: {
+ CheckForValidSection();
+
// identifier ':' -> Label.
Lex();
+ // Diagnose attempt to use '.' as a label.
+ if (IDVal == ".")
+ return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
+
// Diagnose attempt to use a variable as a label.
//
// FIXME: Diagnostics. Note the location of the definition as a label.
// implicitly marked as external.
MCSymbol *Sym;
if (LocalLabelVal == -1)
- Sym = CreateSymbol(IDVal);
+ Sym = getContext().GetOrCreateSymbol(IDVal);
else
Sym = Ctx.CreateDirectionalLocalSymbol(LocalLabelVal);
if (!Sym->isUndefined() || Sym->isVariable())
return Error(IDLoc, "invalid symbol redefinition");
-
+
// Emit the label.
Out.EmitLabel(Sym);
-
+
+ // If we are generating dwarf for assembly source files then gather the
+ // info to make a dwarf label entry for this label if needed.
+ if (getContext().getGenDwarfForAssembly())
+ MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
+ IDLoc);
+
// Consume any end of statement token, if present, to avoid spurious
// AddBlankLine calls().
if (Lexer.is(AsmToken::EndOfStatement)) {
// identifier '=' ... -> assignment statement
Lex();
- return ParseAssignment(IDVal);
+ return ParseAssignment(IDVal, true);
default: // Normal instruction or directive.
break;
}
-
- // Otherwise, we have a normal instruction or directive.
- if (IDVal[0] == '.') {
- // FIXME: This should be driven based on a hash lookup and callback.
- if (IDVal == ".section")
- return ParseDirectiveDarwinSection();
- if (IDVal == ".text")
- // FIXME: This changes behavior based on the -static flag to the
- // assembler.
- return ParseDirectiveSectionSwitch("__TEXT", "__text",
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
- if (IDVal == ".const")
- return ParseDirectiveSectionSwitch("__TEXT", "__const");
- if (IDVal == ".static_const")
- return ParseDirectiveSectionSwitch("__TEXT", "__static_const");
- if (IDVal == ".cstring")
- return ParseDirectiveSectionSwitch("__TEXT","__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".literal4")
- return ParseDirectiveSectionSwitch("__TEXT", "__literal4",
- MCSectionMachO::S_4BYTE_LITERALS,
- 4);
- if (IDVal == ".literal8")
- return ParseDirectiveSectionSwitch("__TEXT", "__literal8",
- MCSectionMachO::S_8BYTE_LITERALS,
- 8);
- if (IDVal == ".literal16")
- return ParseDirectiveSectionSwitch("__TEXT","__literal16",
- MCSectionMachO::S_16BYTE_LITERALS,
- 16);
- if (IDVal == ".constructor")
- return ParseDirectiveSectionSwitch("__TEXT","__constructor");
- if (IDVal == ".destructor")
- return ParseDirectiveSectionSwitch("__TEXT","__destructor");
- if (IDVal == ".fvmlib_init0")
- return ParseDirectiveSectionSwitch("__TEXT","__fvmlib_init0");
- if (IDVal == ".fvmlib_init1")
- return ParseDirectiveSectionSwitch("__TEXT","__fvmlib_init1");
-
- // FIXME: The assembler manual claims that this has the self modify code
- // flag, at least on x86-32, but that does not appear to be correct.
- if (IDVal == ".symbol_stub")
- return ParseDirectiveSectionSwitch("__TEXT","__symbol_stub",
- MCSectionMachO::S_SYMBOL_STUBS |
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- // FIXME: Different on PPC and ARM.
- 0, 16);
- // FIXME: PowerPC only?
- if (IDVal == ".picsymbol_stub")
- return ParseDirectiveSectionSwitch("__TEXT","__picsymbol_stub",
- MCSectionMachO::S_SYMBOL_STUBS |
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- 0, 26);
- if (IDVal == ".data")
- return ParseDirectiveSectionSwitch("__DATA", "__data");
- if (IDVal == ".static_data")
- return ParseDirectiveSectionSwitch("__DATA", "__static_data");
-
- // FIXME: The section names of these two are misspelled in the assembler
- // manual.
- if (IDVal == ".non_lazy_symbol_pointer")
- return ParseDirectiveSectionSwitch("__DATA", "__nl_symbol_ptr",
- MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
- 4);
- if (IDVal == ".lazy_symbol_pointer")
- return ParseDirectiveSectionSwitch("__DATA", "__la_symbol_ptr",
- MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
- 4);
-
- if (IDVal == ".dyld")
- return ParseDirectiveSectionSwitch("__DATA", "__dyld");
- if (IDVal == ".mod_init_func")
- return ParseDirectiveSectionSwitch("__DATA", "__mod_init_func",
- MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
- 4);
- if (IDVal == ".mod_term_func")
- return ParseDirectiveSectionSwitch("__DATA", "__mod_term_func",
- MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
- 4);
- if (IDVal == ".const_data")
- return ParseDirectiveSectionSwitch("__DATA", "__const");
-
-
- if (IDVal == ".objc_class")
- return ParseDirectiveSectionSwitch("__OBJC", "__class",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_meta_class")
- return ParseDirectiveSectionSwitch("__OBJC", "__meta_class",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cat_cls_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__cat_cls_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cat_inst_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__cat_inst_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_protocol")
- return ParseDirectiveSectionSwitch("__OBJC", "__protocol",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_string_object")
- return ParseDirectiveSectionSwitch("__OBJC", "__string_object",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cls_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__cls_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_inst_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__inst_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cls_refs")
- return ParseDirectiveSectionSwitch("__OBJC", "__cls_refs",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
- MCSectionMachO::S_LITERAL_POINTERS,
- 4);
- if (IDVal == ".objc_message_refs")
- return ParseDirectiveSectionSwitch("__OBJC", "__message_refs",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
- MCSectionMachO::S_LITERAL_POINTERS,
- 4);
- if (IDVal == ".objc_symbols")
- return ParseDirectiveSectionSwitch("__OBJC", "__symbols",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_category")
- return ParseDirectiveSectionSwitch("__OBJC", "__category",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_class_vars")
- return ParseDirectiveSectionSwitch("__OBJC", "__class_vars",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_instance_vars")
- return ParseDirectiveSectionSwitch("__OBJC", "__instance_vars",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_module_info")
- return ParseDirectiveSectionSwitch("__OBJC", "__module_info",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_class_names")
- return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".objc_meth_var_types")
- return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".objc_meth_var_names")
- return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".objc_selector_strs")
- return ParseDirectiveSectionSwitch("__OBJC", "__selector_strs",
- MCSectionMachO::S_CSTRING_LITERALS);
-
- if (IDVal == ".tdata")
- return ParseDirectiveSectionSwitch("__DATA", "__thread_data",
- MCSectionMachO::S_THREAD_LOCAL_REGULAR);
- if (IDVal == ".tlv")
- return ParseDirectiveSectionSwitch("__DATA", "__thread_vars",
- MCSectionMachO::S_THREAD_LOCAL_VARIABLES);
- if (IDVal == ".thread_init_func")
- return ParseDirectiveSectionSwitch("__DATA", "__thread_init",
- MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
-
+
+ // If macros are enabled, check to see if this is a macro instantiation.
+ if (MacrosEnabled)
+ if (const Macro *M = MacroMap.lookup(IDVal))
+ return HandleMacroEntry(IDVal, IDLoc, M);
+
+ // Otherwise, we have a normal instruction or directive.
+ if (IDVal[0] == '.' && IDVal != ".") {
// Assembler features
- if (IDVal == ".set")
- return ParseDirectiveSet();
+ if (IDVal == ".set" || IDVal == ".equ")
+ return ParseDirectiveSet(IDVal, true);
+ if (IDVal == ".equiv")
+ return ParseDirectiveSet(IDVal, false);
// Data directives
if (IDVal == ".ascii")
- return ParseDirectiveAscii(false);
- if (IDVal == ".asciz")
- return ParseDirectiveAscii(true);
+ return ParseDirectiveAscii(IDVal, false);
+ if (IDVal == ".asciz" || IDVal == ".string")
+ return ParseDirectiveAscii(IDVal, true);
if (IDVal == ".byte")
return ParseDirectiveValue(1);
if (IDVal == ".short")
return ParseDirectiveValue(2);
+ if (IDVal == ".value")
+ return ParseDirectiveValue(2);
+ if (IDVal == ".2byte")
+ return ParseDirectiveValue(2);
if (IDVal == ".long")
return ParseDirectiveValue(4);
+ if (IDVal == ".int")
+ return ParseDirectiveValue(4);
+ if (IDVal == ".4byte")
+ return ParseDirectiveValue(4);
if (IDVal == ".quad")
return ParseDirectiveValue(8);
-
- // FIXME: Target hooks for IsPow2.
- if (IDVal == ".align")
- return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
- if (IDVal == ".align32")
- return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
+ if (IDVal == ".8byte")
+ return ParseDirectiveValue(8);
+ if (IDVal == ".single" || IDVal == ".float")
+ return ParseDirectiveRealValue(APFloat::IEEEsingle);
+ if (IDVal == ".double")
+ return ParseDirectiveRealValue(APFloat::IEEEdouble);
+
+ if (IDVal == ".align") {
+ bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes();
+ return ParseDirectiveAlign(IsPow2, /*ExprSize=*/1);
+ }
+ if (IDVal == ".align32") {
+ bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes();
+ return ParseDirectiveAlign(IsPow2, /*ExprSize=*/4);
+ }
if (IDVal == ".balign")
return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
if (IDVal == ".balignw")
if (IDVal == ".fill")
return ParseDirectiveFill();
- if (IDVal == ".space")
+ if (IDVal == ".space" || IDVal == ".skip")
return ParseDirectiveSpace();
+ if (IDVal == ".zero")
+ return ParseDirectiveZero();
// Symbol attribute directives
+ if (IDVal == ".extern") {
+ EatToEndOfStatement(); // .extern is the default, ignore it.
+ return false;
+ }
if (IDVal == ".globl" || IDVal == ".global")
return ParseDirectiveSymbolAttribute(MCSA_Global);
- if (IDVal == ".hidden")
- return ParseDirectiveSymbolAttribute(MCSA_Hidden);
if (IDVal == ".indirect_symbol")
return ParseDirectiveSymbolAttribute(MCSA_IndirectSymbol);
- if (IDVal == ".internal")
- return ParseDirectiveSymbolAttribute(MCSA_Internal);
if (IDVal == ".lazy_reference")
return ParseDirectiveSymbolAttribute(MCSA_LazyReference);
if (IDVal == ".no_dead_strip")
return ParseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
+ if (IDVal == ".symbol_resolver")
+ return ParseDirectiveSymbolAttribute(MCSA_SymbolResolver);
if (IDVal == ".private_extern")
return ParseDirectiveSymbolAttribute(MCSA_PrivateExtern);
- if (IDVal == ".protected")
- return ParseDirectiveSymbolAttribute(MCSA_Protected);
if (IDVal == ".reference")
return ParseDirectiveSymbolAttribute(MCSA_Reference);
- if (IDVal == ".type")
- return ParseDirectiveELFType();
- if (IDVal == ".weak")
- return ParseDirectiveSymbolAttribute(MCSA_Weak);
if (IDVal == ".weak_definition")
return ParseDirectiveSymbolAttribute(MCSA_WeakDefinition);
if (IDVal == ".weak_reference")
if (IDVal == ".weak_def_can_be_hidden")
return ParseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
- if (IDVal == ".comm")
+ if (IDVal == ".comm" || IDVal == ".common")
return ParseDirectiveComm(/*IsLocal=*/false);
if (IDVal == ".lcomm")
return ParseDirectiveComm(/*IsLocal=*/true);
return ParseDirectiveAbort();
if (IDVal == ".include")
return ParseDirectiveInclude();
+ if (IDVal == ".incbin")
+ return ParseDirectiveIncbin();
+
+ if (IDVal == ".code16" || IDVal == ".code16gcc")
+ return TokError(Twine(IDVal) + " not supported yet");
+
+ // Macro-like directives
+ if (IDVal == ".rept")
+ return ParseDirectiveRept(IDLoc);
+ if (IDVal == ".endr")
+ return ParseDirectiveEndr(IDLoc);
// Look up the handler in the handler table.
std::pair<MCAsmParserExtension*, DirectiveHandler> Handler =
DirectiveMap.lookup(IDVal);
if (Handler.first)
- return (Handler.first->*Handler.second)(IDVal, IDLoc);
+ return (*Handler.second)(Handler.first, IDVal, IDLoc);
// Target hook for parsing target specific directives.
if (!getTargetParser().ParseDirective(ID))
return false;
- Warning(IDLoc, "ignoring directive for now");
- EatToEndOfStatement();
- return false;
+ return Error(IDLoc, "unknown directive");
}
+ CheckForValidSection();
+
// Canonicalize the opcode to lower case.
SmallString<128> Opcode;
for (unsigned i = 0, e = IDVal.size(); i != e; ++i)
Opcode.push_back(tolower(IDVal[i]));
-
+
SmallVector<MCParsedAsmOperand*, 8> ParsedOperands;
bool HadError = getTargetParser().ParseInstruction(Opcode.str(), IDLoc,
ParsedOperands);
- if (!HadError && Lexer.isNot(AsmToken::EndOfStatement))
- HadError = TokError("unexpected token in argument list");
- // If parsing succeeded, match the instruction.
- if (!HadError) {
- MCInst Inst;
- if (!getTargetParser().MatchInstruction(ParsedOperands, Inst)) {
- // Emit the instruction on success.
- Out.EmitInstruction(Inst);
- } else {
- // Otherwise emit a diagnostic about the match failure and set the error
- // flag.
- //
- // FIXME: We should give nicer diagnostics about the exact failure.
- Error(IDLoc, "unrecognized instruction");
- HadError = true;
+ // Dump the parsed representation, if requested.
+ if (getShowParsedOperands()) {
+ SmallString<256> Str;
+ raw_svector_ostream OS(Str);
+ OS << "parsed instruction: [";
+ for (unsigned i = 0; i != ParsedOperands.size(); ++i) {
+ if (i != 0)
+ OS << ", ";
+ ParsedOperands[i]->print(OS);
}
+ OS << "]";
+
+ PrintMessage(IDLoc, SourceMgr::DK_Note, OS.str());
}
- // If there was no error, consume the end-of-statement token. Otherwise this
- // will be done by our caller.
- if (!HadError)
- Lex();
+ // If we are generating dwarf for assembly source files and the current
+ // section is the initial text section then generate a .loc directive for
+ // the instruction.
+ if (!HadError && getContext().getGenDwarfForAssembly() &&
+ getContext().getGenDwarfSection() == getStreamer().getCurrentSection() ) {
+ getStreamer().EmitDwarfLocDirective(getContext().getGenDwarfFileNumber(),
+ SrcMgr.FindLineNumber(IDLoc, CurBuffer),
+ 0, DWARF2_LINE_DEFAULT_IS_STMT ?
+ DWARF2_FLAG_IS_STMT : 0, 0, 0,
+ StringRef());
+ }
+
+ // If parsing succeeded, match the instruction.
+ if (!HadError)
+ HadError = getTargetParser().MatchAndEmitInstruction(IDLoc, ParsedOperands,
+ Out);
// Free any parsed operands.
for (unsigned i = 0, e = ParsedOperands.size(); i != e; ++i)
delete ParsedOperands[i];
- return HadError;
+ // Don't skip the rest of the line, the instruction parser is responsible for
+ // that.
+ return false;
+}
+
+/// EatToEndOfLine uses the Lexer to eat the characters to the end of the line
+/// since they may not be able to be tokenized to get to the end of line token.
+void AsmParser::EatToEndOfLine() {
+ if (!Lexer.is(AsmToken::EndOfStatement))
+ Lexer.LexUntilEndOfLine();
+ // Eat EOL.
+ Lex();
+}
+
+/// ParseCppHashLineFilenameComment as this:
+/// ::= # number "filename"
+/// or just as a full line comment if it doesn't have a number and a string.
+bool AsmParser::ParseCppHashLineFilenameComment(const SMLoc &L) {
+ Lex(); // Eat the hash token.
+
+ if (getLexer().isNot(AsmToken::Integer)) {
+ // Consume the line since in cases it is not a well-formed line directive,
+ // as if were simply a full line comment.
+ EatToEndOfLine();
+ return false;
+ }
+
+ int64_t LineNumber = getTok().getIntVal();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::String)) {
+ EatToEndOfLine();
+ return false;
+ }
+
+ StringRef Filename = getTok().getString();
+ // Get rid of the enclosing quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
+
+ // Save the SMLoc, Filename and LineNumber for later use by diagnostics.
+ CppHashLoc = L;
+ CppHashFilename = Filename;
+ CppHashLineNumber = LineNumber;
+
+ // Ignore any trailing characters, they're just comment.
+ EatToEndOfLine();
+ return false;
+}
+
+/// DiagHandler - will use the the last parsed cpp hash line filename comment
+/// for the Filename and LineNo if any in the diagnostic.
+void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
+ const AsmParser *Parser = static_cast<const AsmParser*>(Context);
+ raw_ostream &OS = errs();
+
+ const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
+ const SMLoc &DiagLoc = Diag.getLoc();
+ int DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
+ int CppHashBuf = Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashLoc);
+
+ // Like SourceMgr::PrintMessage() we need to print the include stack if any
+ // before printing the message.
+ int DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
+ if (!Parser->SavedDiagHandler && DiagCurBuffer > 0) {
+ SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
+ DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
+ }
+
+ // If we have not parsed a cpp hash line filename comment or the source
+ // manager changed or buffer changed (like in a nested include) then just
+ // print the normal diagnostic using its Filename and LineNo.
+ if (!Parser->CppHashLineNumber ||
+ &DiagSrcMgr != &Parser->SrcMgr ||
+ DiagBuf != CppHashBuf) {
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
+ else
+ Diag.print(0, OS);
+ return;
+ }
+
+ // Use the CppHashFilename and calculate a line number based on the
+ // CppHashLoc and CppHashLineNumber relative to this Diag's SMLoc for
+ // the diagnostic.
+ const std::string Filename = Parser->CppHashFilename;
+
+ int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
+ int CppHashLocLineNo =
+ Parser->SrcMgr.FindLineNumber(Parser->CppHashLoc, CppHashBuf);
+ int LineNo = Parser->CppHashLineNumber - 1 +
+ (DiagLocLineNo - CppHashLocLineNo);
+
+ SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(),
+ Filename, LineNo, Diag.getColumnNo(),
+ Diag.getKind(), Diag.getMessage(),
+ Diag.getLineContents(), Diag.getRanges());
+
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
+ else
+ NewDiag.print(0, OS);
+}
+
+bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
+ const std::vector<StringRef> &Parameters,
+ const std::vector<MacroArgument> &A,
+ const SMLoc &L) {
+ unsigned NParameters = Parameters.size();
+ if (NParameters != 0 && NParameters != A.size())
+ return Error(L, "Wrong number of arguments");
+
+ while (!Body.empty()) {
+ // Scan for the next substitution.
+ std::size_t End = Body.size(), Pos = 0;
+ for (; Pos != End; ++Pos) {
+ // Check for a substitution or escape.
+ if (!NParameters) {
+ // This macro has no parameters, look for $0, $1, etc.
+ if (Body[Pos] != '$' || Pos + 1 == End)
+ continue;
+
+ char Next = Body[Pos + 1];
+ if (Next == '$' || Next == 'n' || isdigit(Next))
+ break;
+ } else {
+ // This macro has parameters, look for \foo, \bar, etc.
+ if (Body[Pos] == '\\' && Pos + 1 != End)
+ break;
+ }
+ }
+
+ // Add the prefix.
+ OS << Body.slice(0, Pos);
+
+ // Check if we reached the end.
+ if (Pos == End)
+ break;
+
+ if (!NParameters) {
+ switch (Body[Pos+1]) {
+ // $$ => $
+ case '$':
+ OS << '$';
+ break;
+
+ // $n => number of arguments
+ case 'n':
+ OS << A.size();
+ break;
+
+ // $[0-9] => argument
+ default: {
+ // Missing arguments are ignored.
+ unsigned Index = Body[Pos+1] - '0';
+ if (Index >= A.size())
+ break;
+
+ // Otherwise substitute with the token values, with spaces eliminated.
+ for (MacroArgument::const_iterator it = A[Index].begin(),
+ ie = A[Index].end(); it != ie; ++it)
+ OS << it->getString();
+ break;
+ }
+ }
+ Pos += 2;
+ } else {
+ unsigned I = Pos + 1;
+ while (isalnum(Body[I]) && I + 1 != End)
+ ++I;
+
+ const char *Begin = Body.data() + Pos +1;
+ StringRef Argument(Begin, I - (Pos +1));
+ unsigned Index = 0;
+ for (; Index < NParameters; ++Index)
+ if (Parameters[Index] == Argument)
+ break;
+
+ // FIXME: We should error at the macro definition.
+ if (Index == NParameters)
+ return Error(L, "Parameter not found");
+
+ for (MacroArgument::const_iterator it = A[Index].begin(),
+ ie = A[Index].end(); it != ie; ++it)
+ OS << it->getString();
+
+ Pos += 1 + Argument.size();
+ }
+ // Update the scan point.
+ Body = Body.substr(Pos);
+ }
+
+ return false;
+}
+
+MacroInstantiation::MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL,
+ MemoryBuffer *I)
+ : TheMacro(M), Instantiation(I), InstantiationLoc(IL), ExitLoc(EL)
+{
+}
+
+bool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc,
+ const Macro *M) {
+ // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
+ // this, although we should protect against infinite loops.
+ if (ActiveMacros.size() == 20)
+ return TokError("macros cannot be nested more than 20 levels deep");
+
+ // Parse the macro instantiation arguments.
+ std::vector<MacroArgument> MacroArguments;
+ MacroArguments.push_back(MacroArgument());
+ unsigned ParenLevel = 0;
+ for (;;) {
+ if (Lexer.is(AsmToken::Eof))
+ return TokError("unexpected token in macro instantiation");
+ if (Lexer.is(AsmToken::EndOfStatement))
+ break;
+
+ // If we aren't inside parentheses and this is a comma, start a new token
+ // list.
+ if (ParenLevel == 0 && Lexer.is(AsmToken::Comma)) {
+ MacroArguments.push_back(MacroArgument());
+ } else {
+ // Adjust the current parentheses level.
+ if (Lexer.is(AsmToken::LParen))
+ ++ParenLevel;
+ else if (Lexer.is(AsmToken::RParen) && ParenLevel)
+ --ParenLevel;
+
+ // Append the token to the current argument list.
+ MacroArguments.back().push_back(getTok());
+ }
+ Lex();
+ }
+ // If the last argument didn't end up with any tokens, it's not a real
+ // argument and we should remove it from the list. This happens with either
+ // a tailing comma or an empty argument list.
+ if (MacroArguments.back().empty())
+ MacroArguments.pop_back();
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ StringRef Body = M->Body;
+ raw_svector_ostream OS(Buf);
+
+ if (expandMacro(OS, Body, M->Parameters, MacroArguments, getTok().getLoc()))
+ return true;
+
+ // We include the .endmacro in the buffer as our queue to exit the macro
+ // instantiation.
+ OS << ".endmacro\n";
+
+ MemoryBuffer *Instantiation =
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(M, NameLoc,
+ getTok().getLoc(),
+ Instantiation);
+ ActiveMacros.push_back(MI);
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+ Lex();
+
+ return false;
+}
+
+void AsmParser::HandleMacroExit() {
+ // Jump to the EndOfStatement we should return to, and consume it.
+ JumpToLoc(ActiveMacros.back()->ExitLoc);
+ Lex();
+
+ // Pop the instantiation entry.
+ delete ActiveMacros.back();
+ ActiveMacros.pop_back();
+}
+
+static bool IsUsedIn(const MCSymbol *Sym, const MCExpr *Value) {
+ switch (Value->getKind()) {
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = static_cast<const MCBinaryExpr*>(Value);
+ return IsUsedIn(Sym, BE->getLHS()) || IsUsedIn(Sym, BE->getRHS());
+ break;
+ }
+ case MCExpr::Target:
+ case MCExpr::Constant:
+ return false;
+ case MCExpr::SymbolRef: {
+ const MCSymbol &S = static_cast<const MCSymbolRefExpr*>(Value)->getSymbol();
+ if (S.isVariable())
+ return IsUsedIn(Sym, S.getVariableValue());
+ return &S == Sym;
+ }
+ case MCExpr::Unary:
+ return IsUsedIn(Sym, static_cast<const MCUnaryExpr*>(Value)->getSubExpr());
+ }
+
+ llvm_unreachable("Unknown expr kind!");
}
-bool AsmParser::ParseAssignment(const StringRef &Name) {
+bool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) {
// FIXME: Use better location, we should use proper tokens.
SMLoc EqualLoc = Lexer.getLoc();
const MCExpr *Value;
if (ParseExpression(Value))
return true;
-
+
+ // Note: we don't count b as used in "a = b". This is to allow
+ // a = b
+ // b = c
+
if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in assignment");
+ // Error on assignment to '.'.
+ if (Name == ".") {
+ return Error(EqualLoc, ("assignment to pseudo-symbol '.' is unsupported "
+ "(use '.space' or '.org').)"));
+ }
+
// Eat the end of statement marker.
Lex();
//
// FIXME: Diagnostics. Note the location of the definition as a label.
// FIXME: Diagnose assignment to protected identifier (e.g., register name).
- if (Sym->isUndefined() && !Sym->isUsedInExpr())
+ if (IsUsedIn(Sym, Value))
+ return Error(EqualLoc, "Recursive use of '" + Name + "'");
+ else if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable())
; // Allow redefinitions of undefined symbols only used in directives.
- else if (!Sym->isUndefined() && !Sym->isAbsolute())
+ else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
+ ; // Allow redefinitions of variables that haven't yet been used.
+ else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
return Error(EqualLoc, "redefinition of '" + Name + "'");
else if (!Sym->isVariable())
return Error(EqualLoc, "invalid assignment to '" + Name + "'");
else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
return Error(EqualLoc, "invalid reassignment of non-absolute variable '" +
Name + "'");
+
+ // Don't count these checks as uses.
+ Sym->setUsed(false);
} else
- Sym = CreateSymbol(Name);
+ Sym = getContext().GetOrCreateSymbol(Name);
// FIXME: Handle '.'.
- Sym->setUsedInExpr(true);
-
// Do the assignment.
Out.EmitAssignment(Sym, Value);
/// ::= identifier
/// ::= string
bool AsmParser::ParseIdentifier(StringRef &Res) {
+ // The assembler has relaxed rules for accepting identifiers, in particular we
+ // allow things like '.globl $foo', which would normally be separate
+ // tokens. At this level, we have already lexed so we cannot (currently)
+ // handle this as a context dependent token, instead we detect adjacent tokens
+ // and return the combined identifier.
+ if (Lexer.is(AsmToken::Dollar)) {
+ SMLoc DollarLoc = getLexer().getLoc();
+
+ // Consume the dollar sign, and check for a following identifier.
+ Lex();
+ if (Lexer.isNot(AsmToken::Identifier))
+ return true;
+
+ // We have a '$' followed by an identifier, make sure they are adjacent.
+ if (DollarLoc.getPointer() + 1 != getTok().getLoc().getPointer())
+ return true;
+
+ // Construct the joined identifier and consume the token.
+ Res = StringRef(DollarLoc.getPointer(),
+ getTok().getIdentifier().size() + 1);
+ Lex();
+ return false;
+ }
+
if (Lexer.isNot(AsmToken::Identifier) &&
Lexer.isNot(AsmToken::String))
return true;
}
/// ParseDirectiveSet:
+/// ::= .equ identifier ',' expression
+/// ::= .equiv identifier ',' expression
/// ::= .set identifier ',' expression
-bool AsmParser::ParseDirectiveSet() {
+bool AsmParser::ParseDirectiveSet(StringRef IDVal, bool allow_redef) {
StringRef Name;
if (ParseIdentifier(Name))
- return TokError("expected identifier after '.set' directive");
-
- if (getLexer().isNot(AsmToken::Comma))
- return TokError("unexpected token in '.set'");
- Lex();
-
- return ParseAssignment(Name);
-}
-
-/// ParseDirectiveSection:
-/// ::= .section identifier (',' identifier)*
-/// FIXME: This should actually parse out the segment, section, attributes and
-/// sizeof_stub fields.
-bool AsmParser::ParseDirectiveDarwinSection() {
- SMLoc Loc = getLexer().getLoc();
-
- StringRef SectionName;
- if (ParseIdentifier(SectionName))
- return Error(Loc, "expected identifier after '.section' directive");
-
- // Verify there is a following comma.
- if (!getLexer().is(AsmToken::Comma))
- return TokError("unexpected token in '.section' directive");
-
- std::string SectionSpec = SectionName;
- SectionSpec += ",";
-
- // Add all the tokens until the end of the line, ParseSectionSpecifier will
- // handle this.
- StringRef EOL = Lexer.LexUntilEndOfStatement();
- SectionSpec.append(EOL.begin(), EOL.end());
-
- Lex();
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.section' directive");
- Lex();
-
-
- StringRef Segment, Section;
- unsigned TAA, StubSize;
- std::string ErrorStr =
- MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
- TAA, StubSize);
-
- if (!ErrorStr.empty())
- return Error(Loc, ErrorStr.c_str());
-
- // FIXME: Arch specific.
- bool isText = Segment == "__TEXT"; // FIXME: Hack.
- getStreamer().SwitchSection(Ctx.getMachOSection(
- Segment, Section, TAA, StubSize,
- isText ? SectionKind::getText()
- : SectionKind::getDataRel()));
- return false;
-}
+ return TokError("expected identifier after '" + Twine(IDVal) + "'");
-/// ParseDirectiveSectionSwitch -
-bool AsmParser::ParseDirectiveSectionSwitch(const char *Segment,
- const char *Section,
- unsigned TAA, unsigned Align,
- unsigned StubSize) {
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in section switching directive");
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '" + Twine(IDVal) + "'");
Lex();
-
- // FIXME: Arch specific.
- bool isText = StringRef(Segment) == "__TEXT"; // FIXME: Hack.
- getStreamer().SwitchSection(Ctx.getMachOSection(Segment, Section, TAA, StubSize,
- isText ? SectionKind::getText()
- : SectionKind::getDataRel()));
-
- // Set the implicit alignment, if any.
- //
- // FIXME: This isn't really what 'as' does; I think it just uses the implicit
- // alignment on the section (e.g., if one manually inserts bytes into the
- // section, then just issueing the section switch directive will not realign
- // the section. However, this is arguably more reasonable behavior, and there
- // is no good reason for someone to intentionally emit incorrectly sized
- // values into the implicitly aligned sections.
- if (Align)
- getStreamer().EmitValueToAlignment(Align, 0, 1, 0);
- return false;
+ return ParseAssignment(Name, allow_redef);
}
bool AsmParser::ParseEscapedString(std::string &Data) {
}
/// ParseDirectiveAscii:
-/// ::= ( .ascii | .asciz ) [ "string" ( , "string" )* ]
-bool AsmParser::ParseDirectiveAscii(bool ZeroTerminated) {
+/// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ]
+bool AsmParser::ParseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ CheckForValidSection();
+
for (;;) {
if (getLexer().isNot(AsmToken::String))
- return TokError("expected string in '.ascii' or '.asciz' directive");
+ return TokError("expected string in '" + Twine(IDVal) + "' directive");
std::string Data;
if (ParseEscapedString(Data))
break;
if (getLexer().isNot(AsmToken::Comma))
- return TokError("unexpected token in '.ascii' or '.asciz' directive");
+ return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
Lex();
}
}
/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
bool AsmParser::ParseDirectiveValue(unsigned Size) {
if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ CheckForValidSection();
+
for (;;) {
const MCExpr *Value;
- SMLoc ATTRIBUTE_UNUSED StartLoc = getLexer().getLoc();
+ SMLoc ExprLoc = getLexer().getLoc();
if (ParseExpression(Value))
return true;
// Special case constant expressions to match code generator.
- if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value))
- getStreamer().EmitIntValue(MCE->getValue(), Size, DEFAULT_ADDRSPACE);
- else
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ assert(Size <= 8 && "Invalid size");
+ uint64_t IntValue = MCE->getValue();
+ if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
+ return Error(ExprLoc, "literal value out of range for directive");
+ getStreamer().EmitIntValue(IntValue, Size, DEFAULT_ADDRSPACE);
+ } else
getStreamer().EmitValue(Value, Size, DEFAULT_ADDRSPACE);
if (getLexer().is(AsmToken::EndOfStatement))
break;
-
+
// FIXME: Improve diagnostic.
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
return false;
}
+/// ParseDirectiveRealValue
+/// ::= (.single | .double) [ expression (, expression)* ]
+bool AsmParser::ParseDirectiveRealValue(const fltSemantics &Semantics) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ CheckForValidSection();
+
+ for (;;) {
+ // We don't truly support arithmetic on floating point expressions, so we
+ // have to manually parse unary prefixes.
+ bool IsNeg = false;
+ if (getLexer().is(AsmToken::Minus)) {
+ Lex();
+ IsNeg = true;
+ } else if (getLexer().is(AsmToken::Plus))
+ Lex();
+
+ if (getLexer().isNot(AsmToken::Integer) &&
+ getLexer().isNot(AsmToken::Real) &&
+ getLexer().isNot(AsmToken::Identifier))
+ return TokError("unexpected token in directive");
+
+ // Convert to an APFloat.
+ APFloat Value(Semantics);
+ StringRef IDVal = getTok().getString();
+ if (getLexer().is(AsmToken::Identifier)) {
+ if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
+ Value = APFloat::getInf(Semantics);
+ else if (!IDVal.compare_lower("nan"))
+ Value = APFloat::getNaN(Semantics, false, ~0);
+ else
+ return TokError("invalid floating point literal");
+ } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) ==
+ APFloat::opInvalidOp)
+ return TokError("invalid floating point literal");
+ if (IsNeg)
+ Value.changeSign();
+
+ // Consume the numeric token.
+ Lex();
+
+ // Emit the value as an integer.
+ APInt AsInt = Value.bitcastToAPInt();
+ getStreamer().EmitIntValue(AsInt.getLimitedValue(),
+ AsInt.getBitWidth() / 8, DEFAULT_ADDRSPACE);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
/// ParseDirectiveSpace
/// ::= .space expression [ , expression ]
bool AsmParser::ParseDirectiveSpace() {
+ CheckForValidSection();
+
int64_t NumBytes;
if (ParseAbsoluteExpression(NumBytes))
return true;
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.space' directive");
Lex();
-
+
if (ParseAbsoluteExpression(FillExpr))
return true;
return false;
}
+/// ParseDirectiveZero
+/// ::= .zero expression
+bool AsmParser::ParseDirectiveZero() {
+ CheckForValidSection();
+
+ int64_t NumBytes;
+ if (ParseAbsoluteExpression(NumBytes))
+ return true;
+
+ int64_t Val = 0;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ if (ParseAbsoluteExpression(Val))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.zero' directive");
+
+ Lex();
+
+ getStreamer().EmitFill(NumBytes, Val, DEFAULT_ADDRSPACE);
+
+ return false;
+}
+
/// ParseDirectiveFill
/// ::= .fill expression , expression , expression
bool AsmParser::ParseDirectiveFill() {
+ CheckForValidSection();
+
int64_t NumValues;
if (ParseAbsoluteExpression(NumValues))
return true;
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.fill' directive");
Lex();
-
+
int64_t FillSize;
if (ParseAbsoluteExpression(FillSize))
return true;
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.fill' directive");
Lex();
-
+
int64_t FillExpr;
if (ParseAbsoluteExpression(FillExpr))
return true;
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.fill' directive");
-
+
Lex();
if (FillSize != 1 && FillSize != 2 && FillSize != 4 && FillSize != 8)
/// ParseDirectiveOrg
/// ::= .org expression [ , expression ]
bool AsmParser::ParseDirectiveOrg() {
+ CheckForValidSection();
+
const MCExpr *Offset;
+ SMLoc Loc = getTok().getLoc();
if (ParseExpression(Offset))
return true;
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.org' directive");
Lex();
-
+
if (ParseAbsoluteExpression(FillExpr))
return true;
Lex();
- // FIXME: Only limited forms of relocatable expressions are accepted here, it
- // has to be relative to the current section.
- getStreamer().EmitValueToOffset(Offset, FillExpr);
+ // Only limited forms of relocatable expressions are accepted here, it
+ // has to be relative to the current section. The streamer will return
+ // 'true' if the expression wasn't evaluatable.
+ if (getStreamer().EmitValueToOffset(Offset, FillExpr))
+ return Error(Loc, "expected assembly-time absolute expression");
return false;
}
/// ParseDirectiveAlign
/// ::= {.align, ...} expression [ , expression [ , expression ]]
bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
+ CheckForValidSection();
+
SMLoc AlignmentLoc = getLexer().getLoc();
int64_t Alignment;
if (ParseAbsoluteExpression(Alignment))
MaxBytesLoc = getLexer().getLoc();
if (ParseAbsoluteExpression(MaxBytesToFill))
return true;
-
+
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
}
// Check whether we should use optimal code alignment for this .align
// directive.
- //
- // FIXME: This should be using a target hook.
- bool UseCodeAlign = false;
- if (const MCSectionMachO *S = dyn_cast<MCSectionMachO>(
- getStreamer().getCurrentSection()))
- UseCodeAlign = S->hasAttribute(MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
+ bool UseCodeAlign = getStreamer().getCurrentSection()->UseCodeAlign();
if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
ValueSize == 1 && UseCodeAlign) {
getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill);
} else {
// FIXME: Target specific behavior about how the "extra" bytes are filled.
- getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize, MaxBytesToFill);
+ getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize,
+ MaxBytesToFill);
}
return false;
if (getLexer().isNot(AsmToken::EndOfStatement)) {
for (;;) {
StringRef Name;
+ SMLoc Loc = getTok().getLoc();
if (ParseIdentifier(Name))
- return TokError("expected identifier in directive");
-
- MCSymbol *Sym = CreateSymbol(Name);
+ return Error(Loc, "expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ // Assembler local symbols don't make any sense here. Complain loudly.
+ if (Sym->isTemporary())
+ return Error(Loc, "non-local symbol required in directive");
getStreamer().EmitSymbolAttribute(Sym, Attr);
}
Lex();
- return false;
-}
-
-/// ParseDirectiveELFType
-/// ::= .type identifier , @attribute
-bool AsmParser::ParseDirectiveELFType() {
- StringRef Name;
- if (ParseIdentifier(Name))
- return TokError("expected identifier in directive");
-
- // Handle the identifier as the key symbol.
- MCSymbol *Sym = CreateSymbol(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 (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 '.type' directive");
-
- Lex();
-
- getStreamer().EmitSymbolAttribute(Sym, Attr);
-
- return false;
-}
-
-/// ParseDirectiveDesc
-/// ::= .desc identifier , expression
-bool DarwinAsmParser::ParseDirectiveDesc(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 '.desc' directive");
- Lex();
-
- int64_t DescValue;
- if (getParser().ParseAbsoluteExpression(DescValue))
- return true;
-
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.desc' directive");
-
- Lex();
-
- // Set the n_desc field of this Symbol to this DescValue
- getStreamer().EmitSymbolDesc(Sym, DescValue);
-
return false;
}
/// ParseDirectiveComm
/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
bool AsmParser::ParseDirectiveComm(bool IsLocal) {
+ CheckForValidSection();
+
SMLoc IDLoc = getLexer().getLoc();
StringRef Name;
if (ParseIdentifier(Name))
return TokError("expected identifier in directive");
-
+
// Handle the identifier as the key symbol.
- MCSymbol *Sym = CreateSymbol(Name);
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Pow2AlignmentLoc = getLexer().getLoc();
if (ParseAbsoluteExpression(Pow2Alignment))
return true;
-
+
// If this target takes alignments in bytes (not log) validate and convert.
if (Lexer.getMAI().getAlignmentIsInBytes()) {
if (!isPowerOf2_64(Pow2Alignment))
Pow2Alignment = Log2_64(Pow2Alignment);
}
}
-
+
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.comm' or '.lcomm' directive");
-
+
Lex();
// NOTE: a size of zero for a .comm should create a undefined symbol
return false;
}
-/// ParseDirectiveZerofill
-/// ::= .zerofill segname , sectname [, identifier , size_expression [
-/// , align_expression ]]
-bool DarwinAsmParser::ParseDirectiveZerofill(StringRef, SMLoc) {
- StringRef Segment;
- if (getParser().ParseIdentifier(Segment))
- return TokError("expected segment name after '.zerofill' directive");
+/// ParseDirectiveAbort
+/// ::= .abort [... message ...]
+bool AsmParser::ParseDirectiveAbort() {
+ // FIXME: Use loc from directive.
+ SMLoc Loc = getLexer().getLoc();
+
+ StringRef Str = ParseStringToEndOfStatement();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.abort' directive");
- if (getLexer().isNot(AsmToken::Comma))
- return TokError("unexpected token in directive");
Lex();
- StringRef Section;
- if (getParser().ParseIdentifier(Section))
- return TokError("expected section name after comma in '.zerofill' "
- "directive");
-
- // If this is the end of the line all that was wanted was to create the
- // the section but with no symbol.
- if (getLexer().is(AsmToken::EndOfStatement)) {
- // Create the zerofill section but no symbol
- getStreamer().EmitZerofill(getContext().getMachOSection(
- Segment, Section, MCSectionMachO::S_ZEROFILL,
- 0, SectionKind::getBSS()));
- return false;
- }
+ if (Str.empty())
+ Error(Loc, ".abort detected. Assembly stopping.");
+ else
+ Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
+ // FIXME: Actually abort assembly here.
- if (getLexer().isNot(AsmToken::Comma))
- return TokError("unexpected token in directive");
- Lex();
+ return false;
+}
- SMLoc IDLoc = getLexer().getLoc();
- StringRef IDStr;
- if (getParser().ParseIdentifier(IDStr))
- return TokError("expected identifier in directive");
-
- // handle the identifier as the key symbol.
- MCSymbol *Sym = getContext().GetOrCreateSymbol(IDStr);
+/// ParseDirectiveInclude
+/// ::= .include "filename"
+bool AsmParser::ParseDirectiveInclude() {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.include' directive");
- if (getLexer().isNot(AsmToken::Comma))
- return TokError("unexpected token in directive");
+ std::string Filename = getTok().getString();
+ SMLoc IncludeLoc = getLexer().getLoc();
Lex();
- int64_t Size;
- SMLoc SizeLoc = getLexer().getLoc();
- if (getParser().ParseAbsoluteExpression(Size))
- return true;
-
- int64_t Pow2Alignment = 0;
- SMLoc Pow2AlignmentLoc;
- if (getLexer().is(AsmToken::Comma)) {
- Lex();
- Pow2AlignmentLoc = getLexer().getLoc();
- if (getParser().ParseAbsoluteExpression(Pow2Alignment))
- return true;
- }
-
if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.zerofill' directive");
-
- Lex();
-
- if (Size < 0)
- return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
- "than zero");
-
- // NOTE: The alignment in the directive is a power of 2 value, the assembler
- // may internally end up wanting an alignment in bytes.
- // FIXME: Diagnose overflow.
- if (Pow2Alignment < 0)
- return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
- "can't be less than zero");
+ return TokError("unexpected token in '.include' directive");
- if (!Sym->isUndefined())
- return Error(IDLoc, "invalid symbol redefinition");
+ // Strip the quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
- // Create the zerofill Symbol with Size and Pow2Alignment
- //
- // FIXME: Arch specific.
- getStreamer().EmitZerofill(getContext().getMachOSection(
- Segment, Section, MCSectionMachO::S_ZEROFILL,
- 0, SectionKind::getBSS()),
- Sym, Size, 1 << Pow2Alignment);
+ // Attempt to switch the lexer to the included file before consuming the end
+ // of statement to avoid losing it when we switch.
+ if (EnterIncludeFile(Filename)) {
+ Error(IncludeLoc, "Could not find include file '" + Filename + "'");
+ return true;
+ }
return false;
}
-/// ParseDirectiveTBSS
-/// ::= .tbss identifier, size, align
-bool DarwinAsmParser::ParseDirectiveTBSS(StringRef, SMLoc) {
- SMLoc IDLoc = getLexer().getLoc();
- StringRef Name;
- if (getParser().ParseIdentifier(Name))
- return TokError("expected identifier in directive");
-
- // Handle the identifier as the key symbol.
- MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+/// ParseDirectiveIncbin
+/// ::= .incbin "filename"
+bool AsmParser::ParseDirectiveIncbin() {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.incbin' directive");
- if (getLexer().isNot(AsmToken::Comma))
- return TokError("unexpected token in directive");
+ std::string Filename = getTok().getString();
+ SMLoc IncbinLoc = getLexer().getLoc();
Lex();
- int64_t Size;
- SMLoc SizeLoc = getLexer().getLoc();
- if (getParser().ParseAbsoluteExpression(Size))
- return true;
-
- int64_t Pow2Alignment = 0;
- SMLoc Pow2AlignmentLoc;
- if (getLexer().is(AsmToken::Comma)) {
- Lex();
- Pow2AlignmentLoc = getLexer().getLoc();
- if (getParser().ParseAbsoluteExpression(Pow2Alignment))
- return true;
- }
-
if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.tbss' directive");
-
- Lex();
-
- if (Size < 0)
- return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
- "zero");
+ return TokError("unexpected token in '.incbin' directive");
- // FIXME: Diagnose overflow.
- if (Pow2Alignment < 0)
- return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
- "than zero");
-
- if (!Sym->isUndefined())
- return Error(IDLoc, "invalid symbol redefinition");
-
- getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
- "__DATA", "__thread_bss",
- MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
- 0, SectionKind::getThreadBSS()),
- Sym, Size, 1 << Pow2Alignment);
-
- return false;
-}
-
-/// ParseDirectiveSubsectionsViaSymbols
-/// ::= .subsections_via_symbols
-bool DarwinAsmParser::ParseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.subsections_via_symbols' directive");
-
- Lex();
+ // Strip the quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
- getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+ // Attempt to process the included file.
+ if (ProcessIncbinFile(Filename)) {
+ Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
+ return true;
+ }
return false;
}
-/// ParseDirectiveAbort
-/// ::= .abort [ "abort_string" ]
-bool AsmParser::ParseDirectiveAbort() {
- // FIXME: Use loc from directive.
- SMLoc Loc = getLexer().getLoc();
+/// ParseDirectiveIf
+/// ::= .if expression
+bool AsmParser::ParseDirectiveIf(SMLoc DirectiveLoc) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ int64_t ExprValue;
+ if (ParseAbsoluteExpression(ExprValue))
+ return true;
- StringRef Str = "";
- if (getLexer().isNot(AsmToken::EndOfStatement)) {
- if (getLexer().isNot(AsmToken::String))
- return TokError("expected string in '.abort' directive");
-
- Str = getTok().getString();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.if' directive");
Lex();
- }
-
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.abort' directive");
-
- Lex();
- // FIXME: Handle here.
- if (Str.empty())
- Error(Loc, ".abort detected. Assembly stopping.");
- else
- Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
+ TheCondState.CondMet = ExprValue;
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
return false;
}
-/// ParseDirectiveLsym
-/// ::= .lsym identifier , expression
-bool DarwinAsmParser::ParseDirectiveLsym(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 '.lsym' directive");
- Lex();
-
- const MCExpr *Value;
- if (getParser().ParseExpression(Value))
- return true;
+/// ParseDirectiveIfb
+/// ::= .ifb string
+bool AsmParser::ParseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.lsym' directive");
-
- Lex();
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ StringRef Str = ParseStringToEndOfStatement();
- // We don't currently support this directive.
- //
- // FIXME: Diagnostic location!
- (void) Sym;
- return TokError("directive '.lsym' is unsupported");
-}
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifb' directive");
-/// ParseDirectiveInclude
-/// ::= .include "filename"
-bool AsmParser::ParseDirectiveInclude() {
- if (getLexer().isNot(AsmToken::String))
- return TokError("expected string in '.include' directive");
-
- std::string Filename = getTok().getString();
- SMLoc IncludeLoc = getLexer().getLoc();
- Lex();
+ Lex();
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.include' directive");
-
- // Strip the quotes.
- Filename = Filename.substr(1, Filename.size()-2);
-
- // Attempt to switch the lexer to the included file before consuming the end
- // of statement to avoid losing it when we switch.
- if (EnterIncludeFile(Filename)) {
- PrintMessage(IncludeLoc,
- "Could not find include file '" + Filename + "'",
- "error");
- return true;
+ TheCondState.CondMet = ExpectBlank == Str.empty();
+ TheCondState.Ignore = !TheCondState.CondMet;
}
return false;
}
-/// ParseDirectiveDumpOrLoad
-/// ::= ( .dump | .load ) "filename"
-bool DarwinAsmParser::ParseDirectiveDumpOrLoad(StringRef Directive,
- SMLoc IDLoc) {
- bool IsDump = Directive == ".dump";
- if (getLexer().isNot(AsmToken::String))
- return TokError("expected string in '.dump' or '.load' directive");
-
- Lex();
-
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.dump' or '.load' directive");
-
- Lex();
-
- // FIXME: If/when .dump and .load are implemented they will be done in the
- // the assembly parser and not have any need for an MCStreamer API.
- if (IsDump)
- Warning(IDLoc, "ignoring directive .dump for now");
- else
- Warning(IDLoc, "ignoring directive .load for now");
+/// ParseDirectiveIfc
+/// ::= .ifc string1, string2
+bool AsmParser::ParseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
- return false;
-}
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ StringRef Str1 = ParseStringToComma();
-/// ParseDirectiveSecureLogUnique
-/// ::= .secure_log_unique "log message"
-bool DarwinAsmParser::ParseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
- std::string LogMessage;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.ifc' directive");
- if (getLexer().isNot(AsmToken::String))
- LogMessage = "";
- else{
- LogMessage = getTok().getString();
Lex();
- }
-
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.secure_log_unique' directive");
-
- if (getContext().getSecureLogUsed() != false)
- return Error(IDLoc, ".secure_log_unique specified multiple times");
-
- char *SecureLogFile = getContext().getSecureLogFile();
- if (SecureLogFile == NULL)
- return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
- "environment variable unset.");
-
- raw_ostream *OS = getContext().getSecureLog();
- if (OS == NULL) {
- std::string Err;
- OS = new raw_fd_ostream(SecureLogFile, Err, raw_fd_ostream::F_Append);
- if (!Err.empty()) {
- delete OS;
- return Error(IDLoc, Twine("can't open secure log file: ") +
- SecureLogFile + " (" + Err + ")");
- }
- getContext().setSecureLog(OS);
- }
- int CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
- *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
- << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
- << LogMessage + "\n";
+ StringRef Str2 = ParseStringToEndOfStatement();
- getContext().setSecureLogUsed(true);
-
- return false;
-}
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifc' directive");
-/// ParseDirectiveSecureLogReset
-/// ::= .secure_log_reset
-bool DarwinAsmParser::ParseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.secure_log_reset' directive");
-
- Lex();
+ Lex();
- getContext().setSecureLogUsed(false);
+ TheCondState.CondMet = ExpectEqual == (Str1 == Str2);
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
return false;
}
-/// ParseDirectiveIf
-/// ::= .if expression
-bool AsmParser::ParseDirectiveIf(SMLoc DirectiveLoc) {
+/// ParseDirectiveIfdef
+/// ::= .ifdef symbol
+bool AsmParser::ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
+ StringRef Name;
TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;
- if(TheCondState.Ignore) {
+
+ if (TheCondState.Ignore) {
EatToEndOfStatement();
- }
- else {
- int64_t ExprValue;
- if (ParseAbsoluteExpression(ExprValue))
- return true;
+ } else {
+ if (ParseIdentifier(Name))
+ return TokError("expected identifier after '.ifdef'");
- if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.if' directive");
-
Lex();
- TheCondState.CondMet = ExprValue;
+ MCSymbol *Sym = getContext().LookupSymbol(Name);
+
+ if (expect_defined)
+ TheCondState.CondMet = (Sym != NULL && !Sym->isUndefined());
+ else
+ TheCondState.CondMet = (Sym == NULL || Sym->isUndefined());
TheCondState.Ignore = !TheCondState.CondMet;
}
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.elseif' directive");
-
+
Lex();
TheCondState.CondMet = ExprValue;
TheCondState.Ignore = !TheCondState.CondMet;
bool AsmParser::ParseDirectiveElse(SMLoc DirectiveLoc) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.else' directive");
-
+
Lex();
if (TheCondState.TheCond != AsmCond::IfCond &&
bool AsmParser::ParseDirectiveEndIf(SMLoc DirectiveLoc) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.endif' directive");
-
+
Lex();
if ((TheCondState.TheCond == AsmCond::NoCond) ||
}
/// ParseDirectiveFile
-/// ::= .file [number] string
+/// ::= .file [number] filename
+/// ::= .file number directory filename
bool GenericAsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
// FIXME: I'm not sure what this is.
int64_t FileNumber = -1;
+ SMLoc FileNumberLoc = getLexer().getLoc();
if (getLexer().is(AsmToken::Integer)) {
FileNumber = getTok().getIntVal();
Lex();
if (getLexer().isNot(AsmToken::String))
return TokError("unexpected token in '.file' directive");
- StringRef Filename = getTok().getString();
- Filename = Filename.substr(1, Filename.size()-2);
+ // Usually the directory and filename together, otherwise just the directory.
+ StringRef Path = getTok().getString();
+ Path = Path.substr(1, Path.size()-2);
Lex();
+ StringRef Directory;
+ StringRef Filename;
+ if (getLexer().is(AsmToken::String)) {
+ if (FileNumber == -1)
+ return TokError("explicit path specified, but no file number");
+ Filename = getTok().getString();
+ Filename = Filename.substr(1, Filename.size()-2);
+ Directory = Path;
+ Lex();
+ } else {
+ Filename = Path;
+ }
+
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.file' directive");
if (FileNumber == -1)
getStreamer().EmitFileDirective(Filename);
- else
- getStreamer().EmitDwarfFileDirective(FileNumber, Filename);
+ else {
+ if (getContext().getGenDwarfForAssembly() == true)
+ Error(DirectiveLoc, "input can't have .file dwarf directives when -g is "
+ "used to generate dwarf debug info for assembly code");
+
+ if (getStreamer().EmitDwarfFileDirective(FileNumber, Directory, Filename))
+ Error(FileNumberLoc, "file number already allocated");
+ }
return false;
}
/// ParseDirectiveLoc
-/// ::= .loc number [number [number]]
+/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
+/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
+/// The first number is a file number, must have been previously assigned with
+/// a .file directive, the second number is the line number and optionally the
+/// third number is a column position (zero if not specified). The remaining
+/// optional items are .loc sub-directives.
bool GenericAsmParser::ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc) {
+
if (getLexer().isNot(AsmToken::Integer))
return TokError("unexpected token in '.loc' directive");
-
- // FIXME: What are these fields?
int64_t FileNumber = getTok().getIntVal();
- (void) FileNumber;
- // FIXME: Validate file.
-
+ if (FileNumber < 1)
+ return TokError("file number less than one in '.loc' directive");
+ if (!getContext().isValidDwarfFileNumber(FileNumber))
+ return TokError("unassigned file number in '.loc' directive");
Lex();
- if (getLexer().isNot(AsmToken::EndOfStatement)) {
- if (getLexer().isNot(AsmToken::Integer))
- return TokError("unexpected token in '.loc' directive");
- int64_t Param2 = getTok().getIntVal();
- (void) Param2;
+ int64_t LineNumber = 0;
+ if (getLexer().is(AsmToken::Integer)) {
+ LineNumber = getTok().getIntVal();
+ if (LineNumber < 1)
+ return TokError("line number less than one in '.loc' directive");
Lex();
+ }
- if (getLexer().isNot(AsmToken::EndOfStatement)) {
- if (getLexer().isNot(AsmToken::Integer))
+ int64_t ColumnPos = 0;
+ if (getLexer().is(AsmToken::Integer)) {
+ ColumnPos = getTok().getIntVal();
+ if (ColumnPos < 0)
+ return TokError("column position less than zero in '.loc' directive");
+ Lex();
+ }
+
+ unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
+ unsigned Isa = 0;
+ int64_t Discriminator = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ StringRef Name;
+ SMLoc Loc = getTok().getLoc();
+ if (getParser().ParseIdentifier(Name))
return TokError("unexpected token in '.loc' directive");
- int64_t Param3 = getTok().getIntVal();
- (void) Param3;
+ if (Name == "basic_block")
+ Flags |= DWARF2_FLAG_BASIC_BLOCK;
+ else if (Name == "prologue_end")
+ Flags |= DWARF2_FLAG_PROLOGUE_END;
+ else if (Name == "epilogue_begin")
+ Flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
+ else if (Name == "is_stmt") {
+ SMLoc Loc = getTok().getLoc();
+ const MCExpr *Value;
+ if (getParser().ParseExpression(Value))
+ return true;
+ // The expression must be the constant 0 or 1.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ int Value = MCE->getValue();
+ if (Value == 0)
+ Flags &= ~DWARF2_FLAG_IS_STMT;
+ else if (Value == 1)
+ Flags |= DWARF2_FLAG_IS_STMT;
+ else
+ return Error(Loc, "is_stmt value not 0 or 1");
+ }
+ else {
+ return Error(Loc, "is_stmt value not the constant value of 0 or 1");
+ }
+ }
+ else if (Name == "isa") {
+ SMLoc Loc = getTok().getLoc();
+ const MCExpr *Value;
+ if (getParser().ParseExpression(Value))
+ return true;
+ // The expression must be a constant greater or equal to 0.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ int Value = MCE->getValue();
+ if (Value < 0)
+ return Error(Loc, "isa number less than zero");
+ Isa = Value;
+ }
+ else {
+ return Error(Loc, "isa number not a constant value");
+ }
+ }
+ else if (Name == "discriminator") {
+ if (getParser().ParseAbsoluteExpression(Discriminator))
+ return true;
+ }
+ else {
+ return Error(Loc, "unknown sub-directive in '.loc' directive");
+ }
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+ }
+ }
+
+ getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
+ Isa, Discriminator, StringRef());
+
+ return false;
+}
+
+/// ParseDirectiveStabs
+/// ::= .stabs string, number, number, number
+bool GenericAsmParser::ParseDirectiveStabs(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ return TokError("unsupported directive '" + Directive + "'");
+}
+
+/// ParseDirectiveCFISections
+/// ::= .cfi_sections section [, section]
+bool GenericAsmParser::ParseDirectiveCFISections(StringRef,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ bool EH = false;
+ bool Debug = false;
+
+ if (getParser().ParseIdentifier(Name))
+ return TokError("Expected an identifier");
+
+ if (Name == ".eh_frame")
+ EH = true;
+ else if (Name == ".debug_frame")
+ Debug = true;
+
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getParser().ParseIdentifier(Name))
+ return TokError("Expected an identifier");
+
+ if (Name == ".eh_frame")
+ EH = true;
+ else if (Name == ".debug_frame")
+ Debug = true;
+ }
+
+ getStreamer().EmitCFISections(EH, Debug);
+
+ return false;
+}
+
+/// ParseDirectiveCFIStartProc
+/// ::= .cfi_startproc
+bool GenericAsmParser::ParseDirectiveCFIStartProc(StringRef,
+ SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIStartProc();
+ return false;
+}
+
+/// ParseDirectiveCFIEndProc
+/// ::= .cfi_endproc
+bool GenericAsmParser::ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIEndProc();
+ return false;
+}
+
+/// ParseRegisterOrRegisterNumber - parse register name or number.
+bool GenericAsmParser::ParseRegisterOrRegisterNumber(int64_t &Register,
+ SMLoc DirectiveLoc) {
+ unsigned RegNo;
+
+ if (getLexer().isNot(AsmToken::Integer)) {
+ if (getParser().getTargetParser().ParseRegister(RegNo, DirectiveLoc,
+ DirectiveLoc))
+ return true;
+ Register = getContext().getRegisterInfo().getDwarfRegNum(RegNo, true);
+ } else
+ return getParser().ParseAbsoluteExpression(Register);
+
+ return false;
+}
+
+/// ParseDirectiveCFIDefCfa
+/// ::= .cfi_def_cfa register, offset
+bool GenericAsmParser::ParseDirectiveCFIDefCfa(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Offset = 0;
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIDefCfa(Register, Offset);
+ return false;
+}
+
+/// ParseDirectiveCFIDefCfaOffset
+/// ::= .cfi_def_cfa_offset offset
+bool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Offset = 0;
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIDefCfaOffset(Offset);
+ return false;
+}
+
+/// ParseDirectiveCFIAdjustCfaOffset
+/// ::= .cfi_adjust_cfa_offset adjustment
+bool GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Adjustment = 0;
+ if (getParser().ParseAbsoluteExpression(Adjustment))
+ return true;
+
+ getStreamer().EmitCFIAdjustCfaOffset(Adjustment);
+ return false;
+}
+
+/// ParseDirectiveCFIDefCfaRegister
+/// ::= .cfi_def_cfa_register register
+bool GenericAsmParser::ParseDirectiveCFIDefCfaRegister(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIDefCfaRegister(Register);
+ return false;
+}
+
+/// ParseDirectiveCFIOffset
+/// ::= .cfi_offset register, offset
+bool GenericAsmParser::ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ int64_t Offset = 0;
+
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIOffset(Register, Offset);
+ return false;
+}
+
+/// ParseDirectiveCFIRelOffset
+/// ::= .cfi_rel_offset register, offset
+bool GenericAsmParser::ParseDirectiveCFIRelOffset(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Offset = 0;
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIRelOffset(Register, Offset);
+ return false;
+}
+
+static bool isValidEncoding(int64_t Encoding) {
+ if (Encoding & ~0xff)
+ return false;
+
+ if (Encoding == dwarf::DW_EH_PE_omit)
+ return true;
+
+ const unsigned Format = Encoding & 0xf;
+ if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
+ Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
+ Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
+ Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
+ return false;
+
+ const unsigned Application = Encoding & 0x70;
+ if (Application != dwarf::DW_EH_PE_absptr &&
+ Application != dwarf::DW_EH_PE_pcrel)
+ return false;
+
+ return true;
+}
+
+/// ParseDirectiveCFIPersonalityOrLsda
+/// ::= .cfi_personality encoding, [symbol_name]
+/// ::= .cfi_lsda encoding, [symbol_name]
+bool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ int64_t Encoding = 0;
+ if (getParser().ParseAbsoluteExpression(Encoding))
+ return true;
+ if (Encoding == dwarf::DW_EH_PE_omit)
+ return false;
+
+ if (!isValidEncoding(Encoding))
+ return TokError("unsupported encoding.");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (IDVal == ".cfi_personality")
+ getStreamer().EmitCFIPersonality(Sym, Encoding);
+ else {
+ assert(IDVal == ".cfi_lsda");
+ getStreamer().EmitCFILsda(Sym, Encoding);
+ }
+ return false;
+}
+
+/// ParseDirectiveCFIRememberState
+/// ::= .cfi_remember_state
+bool GenericAsmParser::ParseDirectiveCFIRememberState(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIRememberState();
+ return false;
+}
+
+/// ParseDirectiveCFIRestoreState
+/// ::= .cfi_remember_state
+bool GenericAsmParser::ParseDirectiveCFIRestoreState(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIRestoreState();
+ return false;
+}
+
+/// ParseDirectiveCFISameValue
+/// ::= .cfi_same_value register
+bool GenericAsmParser::ParseDirectiveCFISameValue(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFISameValue(Register);
+
+ return false;
+}
+
+/// ParseDirectiveCFIRestore
+/// ::= .cfi_restore register
+bool GenericAsmParser::ParseDirectiveCFIRestore(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIRestore(Register);
+
+ return false;
+}
+
+/// ParseDirectiveCFIEscape
+/// ::= .cfi_escape expression[,...]
+bool GenericAsmParser::ParseDirectiveCFIEscape(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ std::string Values;
+ int64_t CurrValue;
+ if (getParser().ParseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+
+ while (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getParser().ParseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+ }
+
+ getStreamer().EmitCFIEscape(Values);
+ return false;
+}
+
+/// ParseDirectiveCFISignalFrame
+/// ::= .cfi_signal_frame
+bool GenericAsmParser::ParseDirectiveCFISignalFrame(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ getStreamer().EmitCFISignalFrame();
+
+ return false;
+}
+
+/// ParseDirectiveMacrosOnOff
+/// ::= .macros_on
+/// ::= .macros_off
+bool GenericAsmParser::ParseDirectiveMacrosOnOff(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ getParser().MacrosEnabled = Directive == ".macros_on";
+
+ return false;
+}
+
+/// ParseDirectiveMacro
+/// ::= .macro name [parameters]
+bool GenericAsmParser::ParseDirectiveMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ std::vector<StringRef> Parameters;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for(;;) {
+ StringRef Parameter;
+ if (getParser().ParseIdentifier(Parameter))
+ return TokError("expected identifier in directive");
+ Parameters.push_back(Parameter);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ break;
Lex();
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.macro' directive");
- // FIXME: Do something with the .loc.
+ // Eat the end of statement.
+ Lex();
+
+ AsmToken EndToken, StartToken = getTok();
+
+ // Lex the macro definition.
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof))
+ return Error(DirectiveLoc, "no matching '.endmacro' in definition");
+
+ // Otherwise, check whether we have reach the .endmacro.
+ if (getLexer().is(AsmToken::Identifier) &&
+ (getTok().getIdentifier() == ".endm" ||
+ getTok().getIdentifier() == ".endmacro")) {
+ EndToken = getTok();
+ Lex();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + EndToken.getIdentifier() +
+ "' directive");
+ break;
}
+
+ // Otherwise, scan til the end of the statement.
+ getParser().EatToEndOfStatement();
}
+ if (getParser().MacroMap.lookup(Name)) {
+ return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+ getParser().MacroMap[Name] = new Macro(Name, Body, Parameters);
+ return false;
+}
+
+/// ParseDirectiveEndMacro
+/// ::= .endm
+/// ::= .endmacro
+bool GenericAsmParser::ParseDirectiveEndMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
if (getLexer().isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.file' directive");
+ return TokError("unexpected token in '" + Directive + "' directive");
+
+ // If we are inside a macro instantiation, terminate the current
+ // instantiation.
+ if (!getParser().ActiveMacros.empty()) {
+ getParser().HandleMacroExit();
+ return false;
+ }
+
+ // Otherwise, this .endmacro is a stray entry in the file; well formed
+ // .endmacro directives are handled during the macro definition parsing.
+ return TokError("unexpected '" + Directive + "' in file, "
+ "no current macro definition");
+}
+
+/// ParseDirectivePurgeMacro
+/// ::= .purgem
+bool GenericAsmParser::ParseDirectivePurgeMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in '.purgem' directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.purgem' directive");
+
+ StringMap<Macro*>::iterator I = getParser().MacroMap.find(Name);
+ if (I == getParser().MacroMap.end())
+ return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
+
+ // Undefine the macro.
+ delete I->getValue();
+ getParser().MacroMap.erase(I);
+ return false;
+}
+
+bool GenericAsmParser::ParseDirectiveLEB128(StringRef DirName, SMLoc) {
+ getParser().CheckForValidSection();
+
+ const MCExpr *Value;
+
+ if (getParser().ParseExpression(Value))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ if (DirName[1] == 's')
+ getStreamer().EmitSLEB128Value(Value);
+ else
+ getStreamer().EmitULEB128Value(Value);
+
+ return false;
+}
+
+Macro *AsmParser::ParseMacroLikeBody(SMLoc DirectiveLoc) {
+ AsmToken EndToken, StartToken = getTok();
+
+ unsigned NestLevel = 0;
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof)) {
+ Error(DirectiveLoc, "no matching '.endr' in definition");
+ return 0;
+ }
+
+ if (Lexer.is(AsmToken::Identifier) &&
+ (getTok().getIdentifier() == ".rept")) {
+ ++NestLevel;
+ }
+
+ // Otherwise, check whether we have reached the .endr.
+ if (Lexer.is(AsmToken::Identifier) &&
+ getTok().getIdentifier() == ".endr") {
+ if (NestLevel == 0) {
+ EndToken = getTok();
+ Lex();
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ TokError("unexpected token in '.endr' directive");
+ return 0;
+ }
+ break;
+ }
+ --NestLevel;
+ }
+
+ // Otherwise, scan till the end of the statement.
+ EatToEndOfStatement();
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+
+ // We Are Anonymous.
+ StringRef Name;
+ std::vector<StringRef> Parameters;
+ return new Macro(Name, Body, Parameters);
+}
+
+void AsmParser::InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS) {
+ OS << ".endr\n";
+
+ MemoryBuffer *Instantiation =
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(M, DirectiveLoc,
+ getTok().getLoc(),
+ Instantiation);
+ ActiveMacros.push_back(MI);
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+ Lex();
+}
+
+bool AsmParser::ParseDirectiveRept(SMLoc DirectiveLoc) {
+ int64_t Count;
+ if (ParseAbsoluteExpression(Count))
+ return TokError("unexpected token in '.rept' directive");
+
+ if (Count < 0)
+ return TokError("Count is negative");
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.rept' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the rept definition.
+ Macro *M = ParseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ std::vector<StringRef> Parameters;
+ const std::vector<MacroArgument> A;
+ raw_svector_ostream OS(Buf);
+ while (Count--) {
+ if (expandMacro(OS, M->Body, Parameters, A, getTok().getLoc()))
+ return true;
+ }
+ InstantiateMacroLikeBody(M, DirectiveLoc, OS);
return false;
}
+bool AsmParser::ParseDirectiveEndr(SMLoc DirectiveLoc) {
+ if (ActiveMacros.empty())
+ return TokError("unexpected '.endr' directive, no current .rept");
+
+ // The only .repl that should get here are the ones created by
+ // InstantiateMacroLikeBody.
+ assert(getLexer().is(AsmToken::EndOfStatement));
+
+ HandleMacroExit();
+ return false;
+}
+
+/// \brief Create an MCAsmParser instance.
+MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM,
+ MCContext &C, MCStreamer &Out,
+ const MCAsmInfo &MAI) {
+ return new AsmParser(SM, C, Out, MAI);
+}
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