mirror of
https://github.com/c64scene-ar/llvm-6502.git
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2d53a37573
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200615 91177308-0d34-0410-b5e6-96231b3b80d8
4441 lines
138 KiB
C++
4441 lines
138 KiB
C++
//===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class implements the parser for assembly files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDwarf.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCParser/AsmCond.h"
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#include "llvm/MC/MCParser/AsmLexer.h"
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#include "llvm/MC/MCParser/MCAsmParser.h"
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#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCTargetAsmParser.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cctype>
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#include <set>
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#include <string>
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#include <vector>
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using namespace llvm;
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static cl::opt<bool>
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FatalAssemblerWarnings("fatal-assembler-warnings",
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cl::desc("Consider warnings as error"));
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MCAsmParserSemaCallback::~MCAsmParserSemaCallback() {}
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namespace {
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/// \brief Helper types for tracking macro definitions.
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typedef std::vector<AsmToken> MCAsmMacroArgument;
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typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
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typedef std::pair<StringRef, MCAsmMacroArgument> MCAsmMacroParameter;
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typedef std::vector<MCAsmMacroParameter> MCAsmMacroParameters;
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struct MCAsmMacro {
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StringRef Name;
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StringRef Body;
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MCAsmMacroParameters Parameters;
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public:
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MCAsmMacro(StringRef N, StringRef B, const MCAsmMacroParameters &P) :
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Name(N), Body(B), Parameters(P) {}
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MCAsmMacro(const MCAsmMacro& Other)
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: Name(Other.Name), Body(Other.Body), Parameters(Other.Parameters) {}
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};
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/// \brief Helper class for storing information about an active macro
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/// instantiation.
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struct MacroInstantiation {
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/// The macro being instantiated.
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const MCAsmMacro *TheMacro;
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/// The macro instantiation with substitutions.
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MemoryBuffer *Instantiation;
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/// The location of the instantiation.
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SMLoc InstantiationLoc;
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/// The buffer where parsing should resume upon instantiation completion.
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int ExitBuffer;
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/// The location where parsing should resume upon instantiation completion.
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SMLoc ExitLoc;
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public:
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MacroInstantiation(const MCAsmMacro *M, SMLoc IL, int EB, SMLoc EL,
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MemoryBuffer *I);
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};
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struct ParseStatementInfo {
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/// \brief The parsed operands from the last parsed statement.
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SmallVector<MCParsedAsmOperand*, 8> ParsedOperands;
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/// \brief The opcode from the last parsed instruction.
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unsigned Opcode;
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/// \brief Was there an error parsing the inline assembly?
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bool ParseError;
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SmallVectorImpl<AsmRewrite> *AsmRewrites;
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ParseStatementInfo() : Opcode(~0U), ParseError(false), AsmRewrites(0) {}
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ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
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: Opcode(~0), ParseError(false), AsmRewrites(rewrites) {}
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~ParseStatementInfo() {
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// Free any parsed operands.
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for (unsigned i = 0, e = ParsedOperands.size(); i != e; ++i)
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delete ParsedOperands[i];
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ParsedOperands.clear();
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}
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};
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/// \brief The concrete assembly parser instance.
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class AsmParser : public MCAsmParser {
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AsmParser(const AsmParser &) LLVM_DELETED_FUNCTION;
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void operator=(const AsmParser &) LLVM_DELETED_FUNCTION;
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private:
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AsmLexer Lexer;
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MCContext &Ctx;
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MCStreamer &Out;
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const MCAsmInfo &MAI;
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SourceMgr &SrcMgr;
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SourceMgr::DiagHandlerTy SavedDiagHandler;
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void *SavedDiagContext;
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MCAsmParserExtension *PlatformParser;
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/// This is the current buffer index we're lexing from as managed by the
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/// SourceMgr object.
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int CurBuffer;
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AsmCond TheCondState;
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std::vector<AsmCond> TheCondStack;
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/// \brief maps directive names to handler methods in parser
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/// extensions. Extensions register themselves in this map by calling
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/// addDirectiveHandler.
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StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
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/// \brief Map of currently defined macros.
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StringMap<MCAsmMacro*> MacroMap;
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/// \brief Stack of active macro instantiations.
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std::vector<MacroInstantiation*> ActiveMacros;
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/// \brief List of bodies of anonymous macros.
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std::deque<MCAsmMacro> MacroLikeBodies;
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/// Boolean tracking whether macro substitution is enabled.
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unsigned MacrosEnabledFlag : 1;
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/// Flag tracking whether any errors have been encountered.
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unsigned HadError : 1;
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/// The values from the last parsed cpp hash file line comment if any.
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StringRef CppHashFilename;
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int64_t CppHashLineNumber;
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SMLoc CppHashLoc;
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int CppHashBuf;
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/// When generating dwarf for assembly source files we need to calculate the
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/// logical line number based on the last parsed cpp hash file line comment
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/// and current line. Since this is slow and messes up the SourceMgr's
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/// cache we save the last info we queried with SrcMgr.FindLineNumber().
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SMLoc LastQueryIDLoc;
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int LastQueryBuffer;
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unsigned LastQueryLine;
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/// AssemblerDialect. ~OU means unset value and use value provided by MAI.
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unsigned AssemblerDialect;
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/// \brief is Darwin compatibility enabled?
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bool IsDarwin;
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/// \brief Are we parsing ms-style inline assembly?
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bool ParsingInlineAsm;
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public:
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AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
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const MCAsmInfo &MAI);
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virtual ~AsmParser();
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virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false);
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virtual void addDirectiveHandler(StringRef Directive,
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ExtensionDirectiveHandler Handler) {
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ExtensionDirectiveMap[Directive] = Handler;
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}
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public:
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/// @name MCAsmParser Interface
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/// {
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virtual SourceMgr &getSourceManager() { return SrcMgr; }
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virtual MCAsmLexer &getLexer() { return Lexer; }
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virtual MCContext &getContext() { return Ctx; }
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virtual MCStreamer &getStreamer() { return Out; }
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virtual unsigned getAssemblerDialect() {
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if (AssemblerDialect == ~0U)
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return MAI.getAssemblerDialect();
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else
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return AssemblerDialect;
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}
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virtual void setAssemblerDialect(unsigned i) {
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AssemblerDialect = i;
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}
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virtual void Note(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges = None);
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virtual bool Warning(SMLoc L, const Twine &Msg,
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ArrayRef<SMRange> Ranges = None);
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virtual bool Error(SMLoc L, const Twine &Msg,
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ArrayRef<SMRange> Ranges = None);
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virtual const AsmToken &Lex();
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void setParsingInlineAsm(bool V) { ParsingInlineAsm = V; }
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bool isParsingInlineAsm() { return ParsingInlineAsm; }
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bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
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unsigned &NumOutputs, unsigned &NumInputs,
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SmallVectorImpl<std::pair<void *,bool> > &OpDecls,
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SmallVectorImpl<std::string> &Constraints,
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SmallVectorImpl<std::string> &Clobbers,
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const MCInstrInfo *MII,
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const MCInstPrinter *IP,
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MCAsmParserSemaCallback &SI);
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bool parseExpression(const MCExpr *&Res);
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virtual bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc);
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virtual bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
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virtual bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc);
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virtual bool parseAbsoluteExpression(int64_t &Res);
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/// \brief Parse an identifier or string (as a quoted identifier)
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/// and set \p Res to the identifier contents.
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virtual bool parseIdentifier(StringRef &Res);
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virtual void eatToEndOfStatement();
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virtual void checkForValidSection();
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/// }
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private:
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bool parseStatement(ParseStatementInfo &Info);
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void eatToEndOfLine();
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bool parseCppHashLineFilenameComment(const SMLoc &L);
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void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
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MCAsmMacroParameters Parameters);
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bool expandMacro(raw_svector_ostream &OS, StringRef Body,
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const MCAsmMacroParameters &Parameters,
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const MCAsmMacroArguments &A,
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const SMLoc &L);
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/// \brief Are macros enabled in the parser?
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bool areMacrosEnabled() {return MacrosEnabledFlag;}
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/// \brief Control a flag in the parser that enables or disables macros.
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void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
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/// \brief Lookup a previously defined macro.
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/// \param Name Macro name.
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/// \returns Pointer to macro. NULL if no such macro was defined.
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const MCAsmMacro* lookupMacro(StringRef Name);
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/// \brief Define a new macro with the given name and information.
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void defineMacro(StringRef Name, const MCAsmMacro& Macro);
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/// \brief Undefine a macro. If no such macro was defined, it's a no-op.
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void undefineMacro(StringRef Name);
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/// \brief Are we inside a macro instantiation?
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bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
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/// \brief Handle entry to macro instantiation.
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///
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/// \param M The macro.
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/// \param NameLoc Instantiation location.
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bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
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/// \brief Handle exit from macro instantiation.
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void handleMacroExit();
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/// \brief Extract AsmTokens for a macro argument.
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bool parseMacroArgument(MCAsmMacroArgument &MA);
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/// \brief Parse all macro arguments for a given macro.
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bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
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void printMacroInstantiations();
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void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
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ArrayRef<SMRange> Ranges = None) const {
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SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
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}
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static void DiagHandler(const SMDiagnostic &Diag, void *Context);
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/// \brief Enter the specified file. This returns true on failure.
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bool enterIncludeFile(const std::string &Filename);
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/// \brief Process the specified file for the .incbin directive.
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/// This returns true on failure.
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bool processIncbinFile(const std::string &Filename);
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/// \brief Reset the current lexer position to that given by \p Loc. The
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/// current token is not set; clients should ensure Lex() is called
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/// subsequently.
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///
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/// \param InBuffer If not -1, should be the known buffer id that contains the
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/// location.
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void jumpToLoc(SMLoc Loc, int InBuffer=-1);
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/// \brief Parse up to the end of statement and a return the contents from the
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/// current token until the end of the statement; the current token on exit
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/// will be either the EndOfStatement or EOF.
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virtual StringRef parseStringToEndOfStatement();
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/// \brief Parse until the end of a statement or a comma is encountered,
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/// return the contents from the current token up to the end or comma.
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StringRef parseStringToComma();
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bool parseAssignment(StringRef Name, bool allow_redef,
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bool NoDeadStrip = false);
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bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
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bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
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bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
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bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
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// Generic (target and platform independent) directive parsing.
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enum DirectiveKind {
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DK_NO_DIRECTIVE, // Placeholder
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DK_SET, DK_EQU, DK_EQUIV, DK_ASCII, DK_ASCIZ, DK_STRING, DK_BYTE, DK_SHORT,
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DK_VALUE, DK_2BYTE, DK_LONG, DK_INT, DK_4BYTE, DK_QUAD, DK_8BYTE, DK_OCTA,
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DK_SINGLE, DK_FLOAT, DK_DOUBLE, DK_ALIGN, DK_ALIGN32, DK_BALIGN, DK_BALIGNW,
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DK_BALIGNL, DK_P2ALIGN, DK_P2ALIGNW, DK_P2ALIGNL, DK_ORG, DK_FILL, DK_ENDR,
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DK_BUNDLE_ALIGN_MODE, DK_BUNDLE_LOCK, DK_BUNDLE_UNLOCK,
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DK_ZERO, DK_EXTERN, DK_GLOBL, DK_GLOBAL,
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DK_LAZY_REFERENCE, DK_NO_DEAD_STRIP, DK_SYMBOL_RESOLVER, DK_PRIVATE_EXTERN,
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DK_REFERENCE, DK_WEAK_DEFINITION, DK_WEAK_REFERENCE,
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DK_WEAK_DEF_CAN_BE_HIDDEN, DK_COMM, DK_COMMON, DK_LCOMM, DK_ABORT,
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DK_INCLUDE, DK_INCBIN, DK_CODE16, DK_CODE16GCC, DK_REPT, DK_IRP, DK_IRPC,
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DK_IF, DK_IFB, DK_IFNB, DK_IFC, DK_IFNC, DK_IFDEF, DK_IFNDEF, DK_IFNOTDEF,
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DK_ELSEIF, DK_ELSE, DK_ENDIF,
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DK_SPACE, DK_SKIP, DK_FILE, DK_LINE, DK_LOC, DK_STABS,
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DK_CFI_SECTIONS, DK_CFI_STARTPROC, DK_CFI_ENDPROC, DK_CFI_DEF_CFA,
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DK_CFI_DEF_CFA_OFFSET, DK_CFI_ADJUST_CFA_OFFSET, DK_CFI_DEF_CFA_REGISTER,
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DK_CFI_OFFSET, DK_CFI_REL_OFFSET, DK_CFI_PERSONALITY, DK_CFI_LSDA,
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DK_CFI_REMEMBER_STATE, DK_CFI_RESTORE_STATE, DK_CFI_SAME_VALUE,
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DK_CFI_RESTORE, DK_CFI_ESCAPE, DK_CFI_SIGNAL_FRAME, DK_CFI_UNDEFINED,
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DK_CFI_REGISTER, DK_CFI_WINDOW_SAVE,
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DK_MACROS_ON, DK_MACROS_OFF, DK_MACRO, DK_ENDM, DK_ENDMACRO, DK_PURGEM,
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DK_SLEB128, DK_ULEB128,
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DK_END
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};
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/// \brief Maps directive name --> DirectiveKind enum, for
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/// directives parsed by this class.
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StringMap<DirectiveKind> DirectiveKindMap;
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// ".ascii", ".asciz", ".string"
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bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
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bool parseDirectiveValue(unsigned Size); // ".byte", ".long", ...
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bool parseDirectiveOctaValue(); // ".octa"
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bool parseDirectiveRealValue(const fltSemantics &); // ".single", ...
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bool parseDirectiveFill(); // ".fill"
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bool parseDirectiveZero(); // ".zero"
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// ".set", ".equ", ".equiv"
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bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
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bool parseDirectiveOrg(); // ".org"
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// ".align{,32}", ".p2align{,w,l}"
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bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
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// ".file", ".line", ".loc", ".stabs"
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bool parseDirectiveFile(SMLoc DirectiveLoc);
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bool parseDirectiveLine();
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bool parseDirectiveLoc();
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bool parseDirectiveStabs();
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// .cfi directives
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bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
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bool parseDirectiveCFIWindowSave();
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bool parseDirectiveCFISections();
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bool parseDirectiveCFIStartProc();
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bool parseDirectiveCFIEndProc();
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bool parseDirectiveCFIDefCfaOffset();
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bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
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bool parseDirectiveCFIAdjustCfaOffset();
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bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
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bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
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bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
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bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
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bool parseDirectiveCFIRememberState();
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bool parseDirectiveCFIRestoreState();
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bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
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bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
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bool parseDirectiveCFIEscape();
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bool parseDirectiveCFISignalFrame();
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bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
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// macro directives
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bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
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bool parseDirectiveEndMacro(StringRef Directive);
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bool parseDirectiveMacro(SMLoc DirectiveLoc);
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bool parseDirectiveMacrosOnOff(StringRef Directive);
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// ".bundle_align_mode"
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bool parseDirectiveBundleAlignMode();
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// ".bundle_lock"
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bool parseDirectiveBundleLock();
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// ".bundle_unlock"
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bool parseDirectiveBundleUnlock();
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// ".space", ".skip"
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bool parseDirectiveSpace(StringRef IDVal);
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// .sleb128 (Signed=true) and .uleb128 (Signed=false)
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bool parseDirectiveLEB128(bool Signed);
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/// \brief Parse a directive like ".globl" which
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/// accepts a single symbol (which should be a label or an external).
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bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
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bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
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bool parseDirectiveAbort(); // ".abort"
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bool parseDirectiveInclude(); // ".include"
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bool parseDirectiveIncbin(); // ".incbin"
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bool parseDirectiveIf(SMLoc DirectiveLoc); // ".if"
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// ".ifb" or ".ifnb", depending on ExpectBlank.
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bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
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// ".ifc" or ".ifnc", depending on ExpectEqual.
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bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
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// ".ifdef" or ".ifndef", depending on expect_defined
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bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
|
|
bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
|
|
bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
|
|
bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
|
|
virtual bool parseEscapedString(std::string &Data);
|
|
|
|
const MCExpr *applyModifierToExpr(const MCExpr *E,
|
|
MCSymbolRefExpr::VariantKind Variant);
|
|
|
|
// Macro-like directives
|
|
MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
|
|
void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
|
|
raw_svector_ostream &OS);
|
|
bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
|
|
bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
|
|
bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
|
|
bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
|
|
|
|
// "_emit" or "__emit"
|
|
bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
|
|
size_t Len);
|
|
|
|
// "align"
|
|
bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
|
|
|
|
// "end"
|
|
bool parseDirectiveEnd(SMLoc DirectiveLoc);
|
|
|
|
void initializeDirectiveKindMap();
|
|
};
|
|
}
|
|
|
|
namespace llvm {
|
|
|
|
extern MCAsmParserExtension *createDarwinAsmParser();
|
|
extern MCAsmParserExtension *createELFAsmParser();
|
|
extern MCAsmParserExtension *createCOFFAsmParser();
|
|
|
|
}
|
|
|
|
enum { DEFAULT_ADDRSPACE = 0 };
|
|
|
|
AsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx, MCStreamer &_Out,
|
|
const MCAsmInfo &_MAI)
|
|
: Lexer(_MAI), Ctx(_Ctx), Out(_Out), MAI(_MAI), SrcMgr(_SM),
|
|
PlatformParser(0), CurBuffer(0), MacrosEnabledFlag(true),
|
|
CppHashLineNumber(0), AssemblerDialect(~0U), IsDarwin(false),
|
|
ParsingInlineAsm(false) {
|
|
// 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 platform / file format parser.
|
|
switch (_Ctx.getObjectFileInfo()->getObjectFileType()) {
|
|
case MCObjectFileInfo::IsCOFF:
|
|
PlatformParser = createCOFFAsmParser();
|
|
PlatformParser->Initialize(*this);
|
|
break;
|
|
case MCObjectFileInfo::IsMachO:
|
|
PlatformParser = createDarwinAsmParser();
|
|
PlatformParser->Initialize(*this);
|
|
IsDarwin = true;
|
|
break;
|
|
case MCObjectFileInfo::IsELF:
|
|
PlatformParser = createELFAsmParser();
|
|
PlatformParser->Initialize(*this);
|
|
break;
|
|
}
|
|
|
|
initializeDirectiveKindMap();
|
|
}
|
|
|
|
AsmParser::~AsmParser() {
|
|
assert(ActiveMacros.empty() && "Unexpected active macro instantiation!");
|
|
|
|
// Destroy any macros.
|
|
for (StringMap<MCAsmMacro *>::iterator it = MacroMap.begin(),
|
|
ie = MacroMap.end();
|
|
it != ie; ++it)
|
|
delete it->getValue();
|
|
|
|
delete PlatformParser;
|
|
}
|
|
|
|
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::Note(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
|
|
printMessage(L, SourceMgr::DK_Note, Msg, Ranges);
|
|
printMacroInstantiations();
|
|
}
|
|
|
|
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, ArrayRef<SMRange> Ranges) {
|
|
HadError = true;
|
|
printMessage(L, SourceMgr::DK_Error, Msg, Ranges);
|
|
printMacroInstantiations();
|
|
return true;
|
|
}
|
|
|
|
bool AsmParser::enterIncludeFile(const std::string &Filename) {
|
|
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 searching 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());
|
|
return false;
|
|
}
|
|
|
|
void AsmParser::jumpToLoc(SMLoc Loc, int InBuffer) {
|
|
if (InBuffer != -1) {
|
|
CurBuffer = InBuffer;
|
|
} else {
|
|
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()) {
|
|
jumpToLoc(ParentIncludeLoc);
|
|
tok = &Lexer.Lex();
|
|
}
|
|
}
|
|
|
|
if (tok->is(AsmToken::Error))
|
|
Error(Lexer.getErrLoc(), Lexer.getErr());
|
|
|
|
return *tok;
|
|
}
|
|
|
|
bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
|
|
// Create the initial section, if requested.
|
|
if (!NoInitialTextSection)
|
|
Out.InitSections();
|
|
|
|
// Prime the lexer.
|
|
Lex();
|
|
|
|
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().first);
|
|
MCSymbol *SectionStartSym = getContext().CreateTempSymbol();
|
|
getStreamer().EmitLabel(SectionStartSym);
|
|
getContext().setGenDwarfSectionStartSym(SectionStartSym);
|
|
getStreamer().EmitDwarfFileDirective(getContext().nextGenDwarfFileNumber(),
|
|
StringRef(),
|
|
getContext().getMainFileName());
|
|
}
|
|
|
|
// While we have input, parse each statement.
|
|
while (Lexer.isNot(AsmToken::Eof)) {
|
|
ParseStatementInfo Info;
|
|
if (!parseStatement(Info))
|
|
continue;
|
|
|
|
// 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 SmallVectorImpl<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");
|
|
}
|
|
}
|
|
|
|
// Callback to the target parser in case it needs to do anything.
|
|
if (!HadError)
|
|
getTargetParser().finishParse();
|
|
|
|
// Finalize the output stream if there are no errors and if the client wants
|
|
// us to.
|
|
if (!HadError && !NoFinalize)
|
|
Out.Finish();
|
|
|
|
return HadError;
|
|
}
|
|
|
|
void AsmParser::checkForValidSection() {
|
|
if (!ParsingInlineAsm && !getStreamer().getCurrentSection().first) {
|
|
TokError("expected section directive before assembly directive");
|
|
Out.InitSections();
|
|
}
|
|
}
|
|
|
|
/// \brief 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);
|
|
}
|
|
|
|
/// \brief Parse a paren expression and return it.
|
|
/// NOTE: This assumes the leading '(' has already been consumed.
|
|
///
|
|
/// parenexpr ::= expr)
|
|
///
|
|
bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
if (parseExpression(Res))
|
|
return true;
|
|
if (Lexer.isNot(AsmToken::RParen))
|
|
return TokError("expected ')' in parentheses expression");
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// \brief 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.getTok().getEndLoc();
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// \brief Parse a primary expression and return it.
|
|
/// primaryexpr ::= (parenexpr
|
|
/// primaryexpr ::= symbol
|
|
/// primaryexpr ::= number
|
|
/// primaryexpr ::= '.'
|
|
/// primaryexpr ::= ~,+,- primaryexpr
|
|
bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
SMLoc FirstTokenLoc = getLexer().getLoc();
|
|
AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
|
|
switch (FirstTokenKind) {
|
|
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::At:
|
|
case AsmToken::String:
|
|
case AsmToken::Identifier: {
|
|
StringRef Identifier;
|
|
if (parseIdentifier(Identifier)) {
|
|
if (FirstTokenKind == AsmToken::Dollar) {
|
|
if (Lexer.getMAI().getDollarIsPC()) {
|
|
// This is a '$' reference, which references the current PC. Emit a
|
|
// temporary label to the streamer and refer to it.
|
|
MCSymbol *Sym = Ctx.CreateTempSymbol();
|
|
Out.EmitLabel(Sym);
|
|
Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
|
|
getContext());
|
|
EndLoc = FirstTokenLoc;
|
|
return false;
|
|
} else
|
|
return Error(FirstTokenLoc, "invalid token in expression");
|
|
return true;
|
|
}
|
|
}
|
|
// Parse symbol variant
|
|
std::pair<StringRef, StringRef> Split;
|
|
if (!MAI.useParensForSymbolVariant()) {
|
|
Split = Identifier.split('@');
|
|
} else if (Lexer.is(AsmToken::LParen)) {
|
|
Lexer.Lex(); // eat (
|
|
StringRef VName;
|
|
parseIdentifier(VName);
|
|
if (Lexer.isNot(AsmToken::RParen)) {
|
|
return Error(Lexer.getTok().getLoc(),
|
|
"unexpected token in variant, expected ')'");
|
|
}
|
|
Lexer.Lex(); // eat )
|
|
Split = std::make_pair(Identifier, VName);
|
|
}
|
|
|
|
EndLoc = SMLoc::getFromPointer(Identifier.end());
|
|
|
|
// This is a symbol reference.
|
|
StringRef SymbolName = Identifier;
|
|
MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
|
|
|
|
// Lookup the symbol variant if used.
|
|
if (Split.second.size()) {
|
|
Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
|
|
if (Variant != MCSymbolRefExpr::VK_Invalid) {
|
|
SymbolName = Split.first;
|
|
} else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
|
|
Variant = MCSymbolRefExpr::VK_None;
|
|
} else {
|
|
Variant = MCSymbolRefExpr::VK_None;
|
|
return Error(SMLoc::getFromPointer(Split.second.begin()),
|
|
"invalid variant '" + Split.second + "'");
|
|
}
|
|
}
|
|
|
|
MCSymbol *Sym = getContext().GetOrCreateSymbol(SymbolName);
|
|
|
|
// 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 modifier on variable reference");
|
|
|
|
Res = Sym->getVariableValue();
|
|
return false;
|
|
}
|
|
|
|
// Otherwise create a symbol ref.
|
|
Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
|
|
return false;
|
|
}
|
|
case AsmToken::BigNum:
|
|
return TokError("literal value out of range for directive");
|
|
case AsmToken::Integer: {
|
|
SMLoc Loc = getTok().getLoc();
|
|
int64_t IntVal = getTok().getIntVal();
|
|
Res = MCConstantExpr::Create(IntVal, getContext());
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
Lex(); // Eat token.
|
|
// Look for 'b' or 'f' following an Integer as a directional label
|
|
if (Lexer.getKind() == AsmToken::Identifier) {
|
|
StringRef IDVal = getTok().getString();
|
|
// Lookup the symbol variant if used.
|
|
std::pair<StringRef, StringRef> Split = IDVal.split('@');
|
|
MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
|
|
if (Split.first.size() != IDVal.size()) {
|
|
Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
|
|
if (Variant == MCSymbolRefExpr::VK_Invalid) {
|
|
Variant = MCSymbolRefExpr::VK_None;
|
|
return TokError("invalid variant '" + Split.second + "'");
|
|
}
|
|
IDVal = Split.first;
|
|
}
|
|
if (IDVal == "f" || IDVal == "b") {
|
|
MCSymbol *Sym =
|
|
Ctx.GetDirectionalLocalSymbol(IntVal, IDVal == "f" ? 1 : 0);
|
|
Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
|
|
if (IDVal == "b" && Sym->isUndefined())
|
|
return Error(Loc, "invalid reference to undefined symbol");
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
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());
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
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.
|
|
MCSymbol *Sym = Ctx.CreateTempSymbol();
|
|
Out.EmitLabel(Sym);
|
|
Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None, getContext());
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
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 true;
|
|
Res = MCUnaryExpr::CreateMinus(Res, getContext());
|
|
return false;
|
|
case AsmToken::Plus:
|
|
Lex(); // Eat the operator.
|
|
if (parsePrimaryExpr(Res, EndLoc))
|
|
return true;
|
|
Res = MCUnaryExpr::CreatePlus(Res, getContext());
|
|
return false;
|
|
case AsmToken::Tilde:
|
|
Lex(); // Eat the operator.
|
|
if (parsePrimaryExpr(Res, EndLoc))
|
|
return true;
|
|
Res = MCUnaryExpr::CreateNot(Res, getContext());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool AsmParser::parseExpression(const MCExpr *&Res) {
|
|
SMLoc EndLoc;
|
|
return parseExpression(Res, EndLoc);
|
|
}
|
|
|
|
const MCExpr *
|
|
AsmParser::applyModifierToExpr(const MCExpr *E,
|
|
MCSymbolRefExpr::VariantKind Variant) {
|
|
// Ask the target implementation about this expression first.
|
|
const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
|
|
if (NewE)
|
|
return NewE;
|
|
// 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!");
|
|
}
|
|
|
|
/// \brief Parse an expression and return it.
|
|
///
|
|
/// 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) {
|
|
// Parse the expression.
|
|
Res = 0;
|
|
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))
|
|
Res = MCConstantExpr::Create(Value, getContext());
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
Res = 0;
|
|
return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
|
|
}
|
|
|
|
bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
|
|
const MCExpr *Expr;
|
|
|
|
SMLoc StartLoc = Lexer.getLoc();
|
|
if (parseExpression(Expr))
|
|
return true;
|
|
|
|
if (!Expr->EvaluateAsAbsolute(Res))
|
|
return Error(StartLoc, "expected absolute expression");
|
|
|
|
return false;
|
|
}
|
|
|
|
static unsigned getBinOpPrecedence(AsmToken::TokenKind K,
|
|
MCBinaryExpr::Opcode &Kind) {
|
|
switch (K) {
|
|
default:
|
|
return 0; // not a binop.
|
|
|
|
// Lowest Precedence: &&, ||
|
|
case AsmToken::AmpAmp:
|
|
Kind = MCBinaryExpr::LAnd;
|
|
return 1;
|
|
case AsmToken::PipePipe:
|
|
Kind = MCBinaryExpr::LOr;
|
|
return 1;
|
|
|
|
// Low Precedence: |, &, ^
|
|
//
|
|
// FIXME: gas seems to support '!' as an infix operator?
|
|
case AsmToken::Pipe:
|
|
Kind = MCBinaryExpr::Or;
|
|
return 2;
|
|
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 3;
|
|
case AsmToken::ExclaimEqual:
|
|
case AsmToken::LessGreater:
|
|
Kind = MCBinaryExpr::NE;
|
|
return 3;
|
|
case AsmToken::Less:
|
|
Kind = MCBinaryExpr::LT;
|
|
return 3;
|
|
case AsmToken::LessEqual:
|
|
Kind = MCBinaryExpr::LTE;
|
|
return 3;
|
|
case AsmToken::Greater:
|
|
Kind = MCBinaryExpr::GT;
|
|
return 3;
|
|
case AsmToken::GreaterEqual:
|
|
Kind = MCBinaryExpr::GTE;
|
|
return 3;
|
|
|
|
// 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;
|
|
}
|
|
}
|
|
|
|
/// \brief Parse all binary operators with precedence >= 'Precedence'.
|
|
/// Res contains the LHS of the expression on input.
|
|
bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
|
|
SMLoc &EndLoc) {
|
|
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;
|
|
unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
|
|
if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
|
|
return true;
|
|
|
|
// Merge LHS and RHS according to operator.
|
|
Res = MCBinaryExpr::Create(Kind, Res, RHS, getContext());
|
|
}
|
|
}
|
|
|
|
/// ParseStatement:
|
|
/// ::= EndOfStatement
|
|
/// ::= Label* Directive ...Operands... EndOfStatement
|
|
/// ::= Label* Identifier OperandList* EndOfStatement
|
|
bool AsmParser::parseStatement(ParseStatementInfo &Info) {
|
|
if (Lexer.is(AsmToken::EndOfStatement)) {
|
|
Out.AddBlankLine();
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
// 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;
|
|
// 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) {
|
|
if (!TheCondState.Ignore)
|
|
return TokError("unexpected token at start of statement");
|
|
IDVal = "";
|
|
} else {
|
|
IDVal = getTok().getString();
|
|
Lex(); // Consume the integer token to be used as an identifier token.
|
|
if (Lexer.getKind() != AsmToken::Colon) {
|
|
if (!TheCondState.Ignore)
|
|
return TokError("unexpected token at start of statement");
|
|
}
|
|
}
|
|
} 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.
|
|
StringMap<DirectiveKind>::const_iterator DirKindIt =
|
|
DirectiveKindMap.find(IDVal);
|
|
DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
|
|
? DK_NO_DIRECTIVE
|
|
: DirKindIt->getValue();
|
|
switch (DirKind) {
|
|
default:
|
|
break;
|
|
case DK_IF:
|
|
return parseDirectiveIf(IDLoc);
|
|
case DK_IFB:
|
|
return parseDirectiveIfb(IDLoc, true);
|
|
case DK_IFNB:
|
|
return parseDirectiveIfb(IDLoc, false);
|
|
case DK_IFC:
|
|
return parseDirectiveIfc(IDLoc, true);
|
|
case DK_IFNC:
|
|
return parseDirectiveIfc(IDLoc, false);
|
|
case DK_IFDEF:
|
|
return parseDirectiveIfdef(IDLoc, true);
|
|
case DK_IFNDEF:
|
|
case DK_IFNOTDEF:
|
|
return parseDirectiveIfdef(IDLoc, false);
|
|
case DK_ELSEIF:
|
|
return parseDirectiveElseIf(IDLoc);
|
|
case DK_ELSE:
|
|
return parseDirectiveElse(IDLoc);
|
|
case DK_ENDIF:
|
|
return parseDirectiveEndIf(IDLoc);
|
|
}
|
|
|
|
// Ignore the statement if in the middle of inactive conditional
|
|
// (e.g. ".if 0").
|
|
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.
|
|
// FIXME: This doesn't diagnose assignment to a symbol which has been
|
|
// implicitly marked as external.
|
|
MCSymbol *Sym;
|
|
if (LocalLabelVal == -1)
|
|
Sym = getContext().GetOrCreateSymbol(IDVal);
|
|
else
|
|
Sym = Ctx.CreateDirectionalLocalSymbol(LocalLabelVal);
|
|
if (!Sym->isUndefined() || Sym->isVariable())
|
|
return Error(IDLoc, "invalid symbol redefinition");
|
|
|
|
// Emit the label.
|
|
if (!ParsingInlineAsm)
|
|
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);
|
|
|
|
getTargetParser().onLabelParsed(Sym);
|
|
|
|
// Consume any end of statement token, if present, to avoid spurious
|
|
// AddBlankLine calls().
|
|
if (Lexer.is(AsmToken::EndOfStatement)) {
|
|
Lex();
|
|
if (Lexer.is(AsmToken::Eof))
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
case AsmToken::Equal:
|
|
// identifier '=' ... -> assignment statement
|
|
Lex();
|
|
|
|
return parseAssignment(IDVal, true);
|
|
|
|
default: // Normal instruction or directive.
|
|
break;
|
|
}
|
|
|
|
// If macros are enabled, check to see if this is a macro instantiation.
|
|
if (areMacrosEnabled())
|
|
if (const MCAsmMacro *M = lookupMacro(IDVal)) {
|
|
return handleMacroEntry(M, IDLoc);
|
|
}
|
|
|
|
// Otherwise, we have a normal instruction or directive.
|
|
|
|
// Directives start with "."
|
|
if (IDVal[0] == '.' && IDVal != ".") {
|
|
// There are several entities interested in parsing directives:
|
|
//
|
|
// 1. The target-specific assembly parser. Some directives are target
|
|
// specific or may potentially behave differently on certain targets.
|
|
// 2. Asm parser extensions. For example, platform-specific parsers
|
|
// (like the ELF parser) register themselves as extensions.
|
|
// 3. The generic directive parser implemented by this class. These are
|
|
// all the directives that behave in a target and platform independent
|
|
// manner, or at least have a default behavior that's shared between
|
|
// all targets and platforms.
|
|
|
|
// First query the target-specific parser. It will return 'true' if it
|
|
// isn't interested in this directive.
|
|
if (!getTargetParser().ParseDirective(ID))
|
|
return false;
|
|
|
|
// Next, check the extension directive map to see if any extension has
|
|
// registered itself to parse this directive.
|
|
std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
|
|
ExtensionDirectiveMap.lookup(IDVal);
|
|
if (Handler.first)
|
|
return (*Handler.second)(Handler.first, IDVal, IDLoc);
|
|
|
|
// Finally, if no one else is interested in this directive, it must be
|
|
// generic and familiar to this class.
|
|
switch (DirKind) {
|
|
default:
|
|
break;
|
|
case DK_SET:
|
|
case DK_EQU:
|
|
return parseDirectiveSet(IDVal, true);
|
|
case DK_EQUIV:
|
|
return parseDirectiveSet(IDVal, false);
|
|
case DK_ASCII:
|
|
return parseDirectiveAscii(IDVal, false);
|
|
case DK_ASCIZ:
|
|
case DK_STRING:
|
|
return parseDirectiveAscii(IDVal, true);
|
|
case DK_BYTE:
|
|
return parseDirectiveValue(1);
|
|
case DK_SHORT:
|
|
case DK_VALUE:
|
|
case DK_2BYTE:
|
|
return parseDirectiveValue(2);
|
|
case DK_LONG:
|
|
case DK_INT:
|
|
case DK_4BYTE:
|
|
return parseDirectiveValue(4);
|
|
case DK_QUAD:
|
|
case DK_8BYTE:
|
|
return parseDirectiveValue(8);
|
|
case DK_OCTA:
|
|
return parseDirectiveOctaValue();
|
|
case DK_SINGLE:
|
|
case DK_FLOAT:
|
|
return parseDirectiveRealValue(APFloat::IEEEsingle);
|
|
case DK_DOUBLE:
|
|
return parseDirectiveRealValue(APFloat::IEEEdouble);
|
|
case DK_ALIGN: {
|
|
bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
|
|
return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
|
|
}
|
|
case DK_ALIGN32: {
|
|
bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
|
|
return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
|
|
}
|
|
case DK_BALIGN:
|
|
return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
|
|
case DK_BALIGNW:
|
|
return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
|
|
case DK_BALIGNL:
|
|
return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
|
|
case DK_P2ALIGN:
|
|
return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
|
|
case DK_P2ALIGNW:
|
|
return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
|
|
case DK_P2ALIGNL:
|
|
return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
|
|
case DK_ORG:
|
|
return parseDirectiveOrg();
|
|
case DK_FILL:
|
|
return parseDirectiveFill();
|
|
case DK_ZERO:
|
|
return parseDirectiveZero();
|
|
case DK_EXTERN:
|
|
eatToEndOfStatement(); // .extern is the default, ignore it.
|
|
return false;
|
|
case DK_GLOBL:
|
|
case DK_GLOBAL:
|
|
return parseDirectiveSymbolAttribute(MCSA_Global);
|
|
case DK_LAZY_REFERENCE:
|
|
return parseDirectiveSymbolAttribute(MCSA_LazyReference);
|
|
case DK_NO_DEAD_STRIP:
|
|
return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
|
|
case DK_SYMBOL_RESOLVER:
|
|
return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
|
|
case DK_PRIVATE_EXTERN:
|
|
return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
|
|
case DK_REFERENCE:
|
|
return parseDirectiveSymbolAttribute(MCSA_Reference);
|
|
case DK_WEAK_DEFINITION:
|
|
return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
|
|
case DK_WEAK_REFERENCE:
|
|
return parseDirectiveSymbolAttribute(MCSA_WeakReference);
|
|
case DK_WEAK_DEF_CAN_BE_HIDDEN:
|
|
return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
|
|
case DK_COMM:
|
|
case DK_COMMON:
|
|
return parseDirectiveComm(/*IsLocal=*/false);
|
|
case DK_LCOMM:
|
|
return parseDirectiveComm(/*IsLocal=*/true);
|
|
case DK_ABORT:
|
|
return parseDirectiveAbort();
|
|
case DK_INCLUDE:
|
|
return parseDirectiveInclude();
|
|
case DK_INCBIN:
|
|
return parseDirectiveIncbin();
|
|
case DK_CODE16:
|
|
case DK_CODE16GCC:
|
|
return TokError(Twine(IDVal) + " not supported yet");
|
|
case DK_REPT:
|
|
return parseDirectiveRept(IDLoc, IDVal);
|
|
case DK_IRP:
|
|
return parseDirectiveIrp(IDLoc);
|
|
case DK_IRPC:
|
|
return parseDirectiveIrpc(IDLoc);
|
|
case DK_ENDR:
|
|
return parseDirectiveEndr(IDLoc);
|
|
case DK_BUNDLE_ALIGN_MODE:
|
|
return parseDirectiveBundleAlignMode();
|
|
case DK_BUNDLE_LOCK:
|
|
return parseDirectiveBundleLock();
|
|
case DK_BUNDLE_UNLOCK:
|
|
return parseDirectiveBundleUnlock();
|
|
case DK_SLEB128:
|
|
return parseDirectiveLEB128(true);
|
|
case DK_ULEB128:
|
|
return parseDirectiveLEB128(false);
|
|
case DK_SPACE:
|
|
case DK_SKIP:
|
|
return parseDirectiveSpace(IDVal);
|
|
case DK_FILE:
|
|
return parseDirectiveFile(IDLoc);
|
|
case DK_LINE:
|
|
return parseDirectiveLine();
|
|
case DK_LOC:
|
|
return parseDirectiveLoc();
|
|
case DK_STABS:
|
|
return parseDirectiveStabs();
|
|
case DK_CFI_SECTIONS:
|
|
return parseDirectiveCFISections();
|
|
case DK_CFI_STARTPROC:
|
|
return parseDirectiveCFIStartProc();
|
|
case DK_CFI_ENDPROC:
|
|
return parseDirectiveCFIEndProc();
|
|
case DK_CFI_DEF_CFA:
|
|
return parseDirectiveCFIDefCfa(IDLoc);
|
|
case DK_CFI_DEF_CFA_OFFSET:
|
|
return parseDirectiveCFIDefCfaOffset();
|
|
case DK_CFI_ADJUST_CFA_OFFSET:
|
|
return parseDirectiveCFIAdjustCfaOffset();
|
|
case DK_CFI_DEF_CFA_REGISTER:
|
|
return parseDirectiveCFIDefCfaRegister(IDLoc);
|
|
case DK_CFI_OFFSET:
|
|
return parseDirectiveCFIOffset(IDLoc);
|
|
case DK_CFI_REL_OFFSET:
|
|
return parseDirectiveCFIRelOffset(IDLoc);
|
|
case DK_CFI_PERSONALITY:
|
|
return parseDirectiveCFIPersonalityOrLsda(true);
|
|
case DK_CFI_LSDA:
|
|
return parseDirectiveCFIPersonalityOrLsda(false);
|
|
case DK_CFI_REMEMBER_STATE:
|
|
return parseDirectiveCFIRememberState();
|
|
case DK_CFI_RESTORE_STATE:
|
|
return parseDirectiveCFIRestoreState();
|
|
case DK_CFI_SAME_VALUE:
|
|
return parseDirectiveCFISameValue(IDLoc);
|
|
case DK_CFI_RESTORE:
|
|
return parseDirectiveCFIRestore(IDLoc);
|
|
case DK_CFI_ESCAPE:
|
|
return parseDirectiveCFIEscape();
|
|
case DK_CFI_SIGNAL_FRAME:
|
|
return parseDirectiveCFISignalFrame();
|
|
case DK_CFI_UNDEFINED:
|
|
return parseDirectiveCFIUndefined(IDLoc);
|
|
case DK_CFI_REGISTER:
|
|
return parseDirectiveCFIRegister(IDLoc);
|
|
case DK_CFI_WINDOW_SAVE:
|
|
return parseDirectiveCFIWindowSave();
|
|
case DK_MACROS_ON:
|
|
case DK_MACROS_OFF:
|
|
return parseDirectiveMacrosOnOff(IDVal);
|
|
case DK_MACRO:
|
|
return parseDirectiveMacro(IDLoc);
|
|
case DK_ENDM:
|
|
case DK_ENDMACRO:
|
|
return parseDirectiveEndMacro(IDVal);
|
|
case DK_PURGEM:
|
|
return parseDirectivePurgeMacro(IDLoc);
|
|
case DK_END:
|
|
return parseDirectiveEnd(IDLoc);
|
|
}
|
|
|
|
return Error(IDLoc, "unknown directive");
|
|
}
|
|
|
|
// __asm _emit or __asm __emit
|
|
if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
|
|
IDVal == "_EMIT" || IDVal == "__EMIT"))
|
|
return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
|
|
|
|
// __asm align
|
|
if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
|
|
return parseDirectiveMSAlign(IDLoc, Info);
|
|
|
|
checkForValidSection();
|
|
|
|
// Canonicalize the opcode to lower case.
|
|
std::string OpcodeStr = IDVal.lower();
|
|
ParseInstructionInfo IInfo(Info.AsmRewrites);
|
|
bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, IDLoc,
|
|
Info.ParsedOperands);
|
|
Info.ParseError = HadError;
|
|
|
|
// Dump the parsed representation, if requested.
|
|
if (getShowParsedOperands()) {
|
|
SmallString<256> Str;
|
|
raw_svector_ostream OS(Str);
|
|
OS << "parsed instruction: [";
|
|
for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
|
|
if (i != 0)
|
|
OS << ", ";
|
|
Info.ParsedOperands[i]->print(OS);
|
|
}
|
|
OS << "]";
|
|
|
|
printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
|
|
}
|
|
|
|
// 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().first) {
|
|
|
|
unsigned Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
|
|
|
|
// If we previously parsed a cpp hash file line comment then make sure the
|
|
// current Dwarf File is for the CppHashFilename if not then emit the
|
|
// Dwarf File table for it and adjust the line number for the .loc.
|
|
const SmallVectorImpl<MCDwarfFile *> &MCDwarfFiles =
|
|
getContext().getMCDwarfFiles();
|
|
if (CppHashFilename.size() != 0) {
|
|
if (MCDwarfFiles[getContext().getGenDwarfFileNumber()]->getName() !=
|
|
CppHashFilename)
|
|
getStreamer().EmitDwarfFileDirective(
|
|
getContext().nextGenDwarfFileNumber(), StringRef(),
|
|
CppHashFilename);
|
|
|
|
// Since SrcMgr.FindLineNumber() is slow and messes up the SourceMgr's
|
|
// cache with the different Loc from the call above we save the last
|
|
// info we queried here with SrcMgr.FindLineNumber().
|
|
unsigned CppHashLocLineNo;
|
|
if (LastQueryIDLoc == CppHashLoc && LastQueryBuffer == CppHashBuf)
|
|
CppHashLocLineNo = LastQueryLine;
|
|
else {
|
|
CppHashLocLineNo = SrcMgr.FindLineNumber(CppHashLoc, CppHashBuf);
|
|
LastQueryLine = CppHashLocLineNo;
|
|
LastQueryIDLoc = CppHashLoc;
|
|
LastQueryBuffer = CppHashBuf;
|
|
}
|
|
Line = CppHashLineNumber - 1 + (Line - CppHashLocLineNo);
|
|
}
|
|
|
|
getStreamer().EmitDwarfLocDirective(
|
|
getContext().getGenDwarfFileNumber(), Line, 0,
|
|
DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, 0, 0,
|
|
StringRef());
|
|
}
|
|
|
|
// If parsing succeeded, match the instruction.
|
|
if (!HadError) {
|
|
unsigned ErrorInfo;
|
|
HadError = getTargetParser().MatchAndEmitInstruction(
|
|
IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
|
|
ParsingInlineAsm);
|
|
}
|
|
|
|
// 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;
|
|
CppHashBuf = CurBuffer;
|
|
|
|
// Ignore any trailing characters, they're just comment.
|
|
eatToEndOfLine();
|
|
return false;
|
|
}
|
|
|
|
/// \brief will use 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);
|
|
}
|
|
|
|
// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
|
|
// difference being that that function accepts '@' as part of identifiers and
|
|
// we can't do that. AsmLexer.cpp should probably be changed to handle
|
|
// '@' as a special case when needed.
|
|
static bool isIdentifierChar(char c) {
|
|
return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
|
|
c == '.';
|
|
}
|
|
|
|
bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
|
|
const MCAsmMacroParameters &Parameters,
|
|
const MCAsmMacroArguments &A, const SMLoc &L) {
|
|
unsigned NParameters = Parameters.size();
|
|
if (NParameters != 0 && NParameters != A.size())
|
|
return Error(L, "Wrong number of arguments");
|
|
|
|
// A macro without parameters is handled differently on Darwin:
|
|
// gas accepts no arguments and does no substitutions
|
|
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(static_cast<unsigned char>(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 (MCAsmMacroArgument::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 (isIdentifierChar(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].first == Argument)
|
|
break;
|
|
|
|
if (Index == NParameters) {
|
|
if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
|
|
Pos += 3;
|
|
else {
|
|
OS << '\\' << Argument;
|
|
Pos = I;
|
|
}
|
|
} else {
|
|
for (MCAsmMacroArgument::const_iterator it = A[Index].begin(),
|
|
ie = A[Index].end();
|
|
it != ie; ++it)
|
|
if (it->getKind() == AsmToken::String)
|
|
OS << it->getStringContents();
|
|
else
|
|
OS << it->getString();
|
|
|
|
Pos += 1 + Argument.size();
|
|
}
|
|
}
|
|
// Update the scan point.
|
|
Body = Body.substr(Pos);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
MacroInstantiation::MacroInstantiation(const MCAsmMacro *M, SMLoc IL, int EB,
|
|
SMLoc EL, MemoryBuffer *I)
|
|
: TheMacro(M), Instantiation(I), InstantiationLoc(IL), ExitBuffer(EB),
|
|
ExitLoc(EL) {}
|
|
|
|
static bool isOperator(AsmToken::TokenKind kind) {
|
|
switch (kind) {
|
|
default:
|
|
return false;
|
|
case AsmToken::Plus:
|
|
case AsmToken::Minus:
|
|
case AsmToken::Tilde:
|
|
case AsmToken::Slash:
|
|
case AsmToken::Star:
|
|
case AsmToken::Dot:
|
|
case AsmToken::Equal:
|
|
case AsmToken::EqualEqual:
|
|
case AsmToken::Pipe:
|
|
case AsmToken::PipePipe:
|
|
case AsmToken::Caret:
|
|
case AsmToken::Amp:
|
|
case AsmToken::AmpAmp:
|
|
case AsmToken::Exclaim:
|
|
case AsmToken::ExclaimEqual:
|
|
case AsmToken::Percent:
|
|
case AsmToken::Less:
|
|
case AsmToken::LessEqual:
|
|
case AsmToken::LessLess:
|
|
case AsmToken::LessGreater:
|
|
case AsmToken::Greater:
|
|
case AsmToken::GreaterEqual:
|
|
case AsmToken::GreaterGreater:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
class AsmLexerSkipSpaceRAII {
|
|
public:
|
|
AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
|
|
Lexer.setSkipSpace(SkipSpace);
|
|
}
|
|
|
|
~AsmLexerSkipSpaceRAII() {
|
|
Lexer.setSkipSpace(true);
|
|
}
|
|
|
|
private:
|
|
AsmLexer &Lexer;
|
|
};
|
|
}
|
|
|
|
bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA) {
|
|
unsigned ParenLevel = 0;
|
|
unsigned AddTokens = 0;
|
|
|
|
// Darwin doesn't use spaces to delmit arguments.
|
|
AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
|
|
|
|
for (;;) {
|
|
if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
|
|
return TokError("unexpected token in macro instantiation");
|
|
|
|
if (ParenLevel == 0 && Lexer.is(AsmToken::Comma))
|
|
break;
|
|
|
|
if (Lexer.is(AsmToken::Space)) {
|
|
Lex(); // Eat spaces
|
|
|
|
// Spaces can delimit parameters, but could also be part an expression.
|
|
// If the token after a space is an operator, add the token and the next
|
|
// one into this argument
|
|
if (!IsDarwin) {
|
|
if (isOperator(Lexer.getKind())) {
|
|
// Check to see whether the token is used as an operator,
|
|
// or part of an identifier
|
|
const char *NextChar = getTok().getEndLoc().getPointer();
|
|
if (*NextChar == ' ')
|
|
AddTokens = 2;
|
|
}
|
|
|
|
if (!AddTokens && ParenLevel == 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// handleMacroEntry relies on not advancing the lexer here
|
|
// to be able to fill in the remaining default parameter values
|
|
if (Lexer.is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
// 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.
|
|
MA.push_back(getTok());
|
|
if (AddTokens)
|
|
AddTokens--;
|
|
Lex();
|
|
}
|
|
|
|
if (ParenLevel != 0)
|
|
return TokError("unbalanced parentheses in macro argument");
|
|
return false;
|
|
}
|
|
|
|
// Parse the macro instantiation arguments.
|
|
bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
|
|
MCAsmMacroArguments &A) {
|
|
const unsigned NParameters = M ? M->Parameters.size() : 0;
|
|
|
|
// Parse two kinds of macro invocations:
|
|
// - macros defined without any parameters accept an arbitrary number of them
|
|
// - macros defined with parameters accept at most that many of them
|
|
for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
|
|
++Parameter) {
|
|
MCAsmMacroArgument MA;
|
|
|
|
if (parseMacroArgument(MA))
|
|
return true;
|
|
|
|
if (!MA.empty() || (!NParameters && !Lexer.is(AsmToken::EndOfStatement)))
|
|
A.push_back(MA);
|
|
else if (NParameters) {
|
|
if (!M->Parameters[Parameter].second.empty())
|
|
A.push_back(M->Parameters[Parameter].second);
|
|
else
|
|
A.push_back(MA);
|
|
}
|
|
|
|
// At the end of the statement, fill in remaining arguments that have
|
|
// default values. If there aren't any, then the next argument is
|
|
// required but missing
|
|
if (Lexer.is(AsmToken::EndOfStatement)) {
|
|
if (NParameters && Parameter < NParameters - 1) {
|
|
continue;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (Lexer.is(AsmToken::Comma))
|
|
Lex();
|
|
}
|
|
return TokError("Too many arguments");
|
|
}
|
|
|
|
const MCAsmMacro *AsmParser::lookupMacro(StringRef Name) {
|
|
StringMap<MCAsmMacro *>::iterator I = MacroMap.find(Name);
|
|
return (I == MacroMap.end()) ? NULL : I->getValue();
|
|
}
|
|
|
|
void AsmParser::defineMacro(StringRef Name, const MCAsmMacro &Macro) {
|
|
MacroMap[Name] = new MCAsmMacro(Macro);
|
|
}
|
|
|
|
void AsmParser::undefineMacro(StringRef Name) {
|
|
StringMap<MCAsmMacro *>::iterator I = MacroMap.find(Name);
|
|
if (I != MacroMap.end()) {
|
|
delete I->getValue();
|
|
MacroMap.erase(I);
|
|
}
|
|
}
|
|
|
|
bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
|
|
// 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");
|
|
|
|
MCAsmMacroArguments A;
|
|
if (parseMacroArguments(M, A))
|
|
return true;
|
|
|
|
// 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, A, getTok().getLoc()))
|
|
return true;
|
|
|
|
// We include the .endmacro in the buffer as our cue 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, CurBuffer, 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, ActiveMacros.back()->ExitBuffer);
|
|
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());
|
|
}
|
|
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(StringRef Name, bool allow_redef,
|
|
bool NoDeadStrip) {
|
|
// 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();
|
|
|
|
// Validate that the LHS is allowed to be a variable (either it has not been
|
|
// used as a symbol, or it is an absolute symbol).
|
|
MCSymbol *Sym = getContext().LookupSymbol(Name);
|
|
if (Sym) {
|
|
// Diagnose assignment to a label.
|
|
//
|
|
// FIXME: Diagnostics. Note the location of the definition as a label.
|
|
// FIXME: Diagnose assignment to protected identifier (e.g., register name).
|
|
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->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 = getContext().GetOrCreateSymbol(Name);
|
|
|
|
// FIXME: Handle '.'.
|
|
|
|
// Do the assignment.
|
|
Out.EmitAssignment(Sym, Value);
|
|
if (NoDeadStrip)
|
|
Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseIdentifier:
|
|
/// ::= identifier
|
|
/// ::= string
|
|
bool AsmParser::parseIdentifier(StringRef &Res) {
|
|
// The assembler has relaxed rules for accepting identifiers, in particular we
|
|
// allow things like '.globl $foo' and '.def @feat.00', 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) || Lexer.is(AsmToken::At)) {
|
|
SMLoc PrefixLoc = getLexer().getLoc();
|
|
|
|
// Consume the prefix character, and check for a following identifier.
|
|
Lex();
|
|
if (Lexer.isNot(AsmToken::Identifier))
|
|
return true;
|
|
|
|
// We have a '$' or '@' followed by an identifier, make sure they are adjacent.
|
|
if (PrefixLoc.getPointer() + 1 != getTok().getLoc().getPointer())
|
|
return true;
|
|
|
|
// Construct the joined identifier and consume the token.
|
|
Res =
|
|
StringRef(PrefixLoc.getPointer(), getTok().getIdentifier().size() + 1);
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
|
|
return true;
|
|
|
|
Res = getTok().getIdentifier();
|
|
|
|
Lex(); // Consume the identifier token.
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveSet:
|
|
/// ::= .equ identifier ',' expression
|
|
/// ::= .equiv identifier ',' expression
|
|
/// ::= .set identifier ',' expression
|
|
bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
|
|
StringRef Name;
|
|
|
|
if (parseIdentifier(Name))
|
|
return TokError("expected identifier after '" + Twine(IDVal) + "'");
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '" + Twine(IDVal) + "'");
|
|
Lex();
|
|
|
|
return parseAssignment(Name, allow_redef, true);
|
|
}
|
|
|
|
bool AsmParser::parseEscapedString(std::string &Data) {
|
|
assert(getLexer().is(AsmToken::String) && "Unexpected current token!");
|
|
|
|
Data = "";
|
|
StringRef Str = getTok().getStringContents();
|
|
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
|
|
if (Str[i] != '\\') {
|
|
Data += Str[i];
|
|
continue;
|
|
}
|
|
|
|
// Recognize escaped characters. Note that this escape semantics currently
|
|
// loosely follows Darwin 'as'. Notably, it doesn't support hex escapes.
|
|
++i;
|
|
if (i == e)
|
|
return TokError("unexpected backslash at end of string");
|
|
|
|
// Recognize octal sequences.
|
|
if ((unsigned)(Str[i] - '0') <= 7) {
|
|
// Consume up to three octal characters.
|
|
unsigned Value = Str[i] - '0';
|
|
|
|
if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
|
|
++i;
|
|
Value = Value * 8 + (Str[i] - '0');
|
|
|
|
if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
|
|
++i;
|
|
Value = Value * 8 + (Str[i] - '0');
|
|
}
|
|
}
|
|
|
|
if (Value > 255)
|
|
return TokError("invalid octal escape sequence (out of range)");
|
|
|
|
Data += (unsigned char)Value;
|
|
continue;
|
|
}
|
|
|
|
// Otherwise recognize individual escapes.
|
|
switch (Str[i]) {
|
|
default:
|
|
// Just reject invalid escape sequences for now.
|
|
return TokError("invalid escape sequence (unrecognized character)");
|
|
|
|
case 'b': Data += '\b'; break;
|
|
case 'f': Data += '\f'; break;
|
|
case 'n': Data += '\n'; break;
|
|
case 'r': Data += '\r'; break;
|
|
case 't': Data += '\t'; break;
|
|
case '"': Data += '"'; break;
|
|
case '\\': Data += '\\'; break;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveAscii:
|
|
/// ::= ( .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 '" + Twine(IDVal) + "' directive");
|
|
|
|
std::string Data;
|
|
if (parseEscapedString(Data))
|
|
return true;
|
|
|
|
getStreamer().EmitBytes(Data);
|
|
if (ZeroTerminated)
|
|
getStreamer().EmitBytes(StringRef("\0", 1));
|
|
|
|
Lex();
|
|
|
|
if (getLexer().is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveValue
|
|
/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
|
|
bool AsmParser::parseDirectiveValue(unsigned Size) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
checkForValidSection();
|
|
|
|
for (;;) {
|
|
const MCExpr *Value;
|
|
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)) {
|
|
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);
|
|
} else
|
|
getStreamer().EmitValue(Value, Size);
|
|
|
|
if (getLexer().is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
// FIXME: Improve diagnostic.
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveOctaValue
|
|
/// ::= .octa [ hexconstant (, hexconstant)* ]
|
|
bool AsmParser::parseDirectiveOctaValue() {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
checkForValidSection();
|
|
|
|
for (;;) {
|
|
if (Lexer.getKind() == AsmToken::Error)
|
|
return true;
|
|
if (Lexer.getKind() != AsmToken::Integer &&
|
|
Lexer.getKind() != AsmToken::BigNum)
|
|
return TokError("unknown token in expression");
|
|
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
APInt IntValue = getTok().getAPIntVal();
|
|
Lex();
|
|
|
|
uint64_t hi, lo;
|
|
if (IntValue.isIntN(64)) {
|
|
hi = 0;
|
|
lo = IntValue.getZExtValue();
|
|
} else if (IntValue.isIntN(128)) {
|
|
// It might actually have more than 128 bits, but the top ones are zero.
|
|
hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
|
|
lo = IntValue.getLoBits(64).getZExtValue();
|
|
} else
|
|
return Error(ExprLoc, "literal value out of range for directive");
|
|
|
|
if (MAI.isLittleEndian()) {
|
|
getStreamer().EmitIntValue(lo, 8);
|
|
getStreamer().EmitIntValue(hi, 8);
|
|
} else {
|
|
getStreamer().EmitIntValue(hi, 8);
|
|
getStreamer().EmitIntValue(lo, 8);
|
|
}
|
|
|
|
if (getLexer().is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
// FIXME: Improve diagnostic.
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
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);
|
|
|
|
if (getLexer().is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
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);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveFill
|
|
/// ::= .fill expression [ , expression [ , expression ] ]
|
|
bool AsmParser::parseDirectiveFill() {
|
|
checkForValidSection();
|
|
|
|
SMLoc RepeatLoc = getLexer().getLoc();
|
|
int64_t NumValues;
|
|
if (parseAbsoluteExpression(NumValues))
|
|
return true;
|
|
|
|
if (NumValues < 0) {
|
|
Warning(RepeatLoc,
|
|
"'.fill' directive with negative repeat count has no effect");
|
|
NumValues = 0;
|
|
}
|
|
|
|
int64_t FillSize = 1;
|
|
int64_t FillExpr = 0;
|
|
|
|
SMLoc SizeLoc, ExprLoc;
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.fill' directive");
|
|
Lex();
|
|
|
|
SizeLoc = getLexer().getLoc();
|
|
if (parseAbsoluteExpression(FillSize))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.fill' directive");
|
|
Lex();
|
|
|
|
ExprLoc = getLexer().getLoc();
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.fill' directive");
|
|
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
if (FillSize < 0) {
|
|
Warning(SizeLoc, "'.fill' directive with negative size has no effect");
|
|
NumValues = 0;
|
|
}
|
|
if (FillSize > 8) {
|
|
Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
|
|
FillSize = 8;
|
|
}
|
|
|
|
if (!isUInt<32>(FillExpr) && FillSize > 4)
|
|
Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
|
|
|
|
int64_t NonZeroFillSize = FillSize > 4 ? 4 : FillSize;
|
|
FillExpr &= ~0ULL >> (64 - NonZeroFillSize * 8);
|
|
|
|
for (uint64_t i = 0, e = NumValues; i != e; ++i) {
|
|
getStreamer().EmitIntValue(FillExpr, NonZeroFillSize);
|
|
getStreamer().EmitIntValue(0, FillSize - NonZeroFillSize);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveOrg
|
|
/// ::= .org expression [ , expression ]
|
|
bool AsmParser::parseDirectiveOrg() {
|
|
checkForValidSection();
|
|
|
|
const MCExpr *Offset;
|
|
SMLoc Loc = getTok().getLoc();
|
|
if (parseExpression(Offset))
|
|
return true;
|
|
|
|
// Parse optional fill expression.
|
|
int64_t FillExpr = 0;
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.org' directive");
|
|
Lex();
|
|
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.org' directive");
|
|
}
|
|
|
|
Lex();
|
|
|
|
// 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))
|
|
return true;
|
|
|
|
SMLoc MaxBytesLoc;
|
|
bool HasFillExpr = false;
|
|
int64_t FillExpr = 0;
|
|
int64_t MaxBytesToFill = 0;
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
// The fill expression can be omitted while specifying a maximum number of
|
|
// alignment bytes, e.g:
|
|
// .align 3,,4
|
|
if (getLexer().isNot(AsmToken::Comma)) {
|
|
HasFillExpr = true;
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
}
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
MaxBytesLoc = getLexer().getLoc();
|
|
if (parseAbsoluteExpression(MaxBytesToFill))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in directive");
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
|
|
if (!HasFillExpr)
|
|
FillExpr = 0;
|
|
|
|
// Compute alignment in bytes.
|
|
if (IsPow2) {
|
|
// FIXME: Diagnose overflow.
|
|
if (Alignment >= 32) {
|
|
Error(AlignmentLoc, "invalid alignment value");
|
|
Alignment = 31;
|
|
}
|
|
|
|
Alignment = 1ULL << Alignment;
|
|
} else {
|
|
// Reject alignments that aren't a power of two, for gas compatibility.
|
|
if (!isPowerOf2_64(Alignment))
|
|
Error(AlignmentLoc, "alignment must be a power of 2");
|
|
}
|
|
|
|
// Diagnose non-sensical max bytes to align.
|
|
if (MaxBytesLoc.isValid()) {
|
|
if (MaxBytesToFill < 1) {
|
|
Error(MaxBytesLoc, "alignment directive can never be satisfied in this "
|
|
"many bytes, ignoring maximum bytes expression");
|
|
MaxBytesToFill = 0;
|
|
}
|
|
|
|
if (MaxBytesToFill >= Alignment) {
|
|
Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
|
|
"has no effect");
|
|
MaxBytesToFill = 0;
|
|
}
|
|
}
|
|
|
|
// Check whether we should use optimal code alignment for this .align
|
|
// directive.
|
|
bool UseCodeAlign = getStreamer().getCurrentSection().first->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);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveFile
|
|
/// ::= .file [number] filename
|
|
/// ::= .file number directory filename
|
|
bool AsmParser::parseDirectiveFile(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 (FileNumber < 1)
|
|
return TokError("file number less than one");
|
|
}
|
|
|
|
if (getLexer().isNot(AsmToken::String))
|
|
return TokError("unexpected token in '.file' directive");
|
|
|
|
// Usually the directory and filename together, otherwise just the directory.
|
|
// Allow the strings to have escaped octal character sequence.
|
|
std::string Path = getTok().getString();
|
|
if (parseEscapedString(Path))
|
|
return true;
|
|
Lex();
|
|
|
|
StringRef Directory;
|
|
StringRef Filename;
|
|
std::string FilenameData;
|
|
if (getLexer().is(AsmToken::String)) {
|
|
if (FileNumber == -1)
|
|
return TokError("explicit path specified, but no file number");
|
|
if (parseEscapedString(FilenameData))
|
|
return true;
|
|
Filename = FilenameData;
|
|
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 {
|
|
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;
|
|
}
|
|
|
|
/// parseDirectiveLine
|
|
/// ::= .line [number]
|
|
bool AsmParser::parseDirectiveLine() {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
if (getLexer().isNot(AsmToken::Integer))
|
|
return TokError("unexpected token in '.line' directive");
|
|
|
|
int64_t LineNumber = getTok().getIntVal();
|
|
(void)LineNumber;
|
|
Lex();
|
|
|
|
// FIXME: Do something with the .line.
|
|
}
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.line' directive");
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveLoc
|
|
/// ::= .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 AsmParser::parseDirectiveLoc() {
|
|
if (getLexer().isNot(AsmToken::Integer))
|
|
return TokError("unexpected token in '.loc' directive");
|
|
int64_t FileNumber = getTok().getIntVal();
|
|
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();
|
|
|
|
int64_t LineNumber = 0;
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
LineNumber = getTok().getIntVal();
|
|
if (LineNumber < 0)
|
|
return TokError("line number less than zero in '.loc' directive");
|
|
Lex();
|
|
}
|
|
|
|
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 (parseIdentifier(Name))
|
|
return TokError("unexpected token in '.loc' directive");
|
|
|
|
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") {
|
|
Loc = getTok().getLoc();
|
|
const MCExpr *Value;
|
|
if (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") {
|
|
Loc = getTok().getLoc();
|
|
const MCExpr *Value;
|
|
if (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 (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 AsmParser::parseDirectiveStabs() {
|
|
return TokError("unsupported directive '.stabs'");
|
|
}
|
|
|
|
/// parseDirectiveCFISections
|
|
/// ::= .cfi_sections section [, section]
|
|
bool AsmParser::parseDirectiveCFISections() {
|
|
StringRef Name;
|
|
bool EH = false;
|
|
bool Debug = false;
|
|
|
|
if (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 (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 [simple]
|
|
bool AsmParser::parseDirectiveCFIStartProc() {
|
|
StringRef Simple;
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
if (parseIdentifier(Simple) || Simple != "simple")
|
|
return TokError("unexpected token in .cfi_startproc directive");
|
|
|
|
getStreamer().EmitCFIStartProc(!Simple.empty());
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIEndProc
|
|
/// ::= .cfi_endproc
|
|
bool AsmParser::parseDirectiveCFIEndProc() {
|
|
getStreamer().EmitCFIEndProc();
|
|
return false;
|
|
}
|
|
|
|
/// \brief parse register name or number.
|
|
bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
|
|
SMLoc DirectiveLoc) {
|
|
unsigned RegNo;
|
|
|
|
if (getLexer().isNot(AsmToken::Integer)) {
|
|
if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
|
|
return true;
|
|
Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
|
|
} else
|
|
return parseAbsoluteExpression(Register);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIDefCfa
|
|
/// ::= .cfi_def_cfa register, offset
|
|
bool AsmParser::parseDirectiveCFIDefCfa(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 (parseAbsoluteExpression(Offset))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIDefCfa(Register, Offset);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIDefCfaOffset
|
|
/// ::= .cfi_def_cfa_offset offset
|
|
bool AsmParser::parseDirectiveCFIDefCfaOffset() {
|
|
int64_t Offset = 0;
|
|
if (parseAbsoluteExpression(Offset))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIDefCfaOffset(Offset);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRegister
|
|
/// ::= .cfi_register register, register
|
|
bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
|
|
int64_t Register1 = 0;
|
|
if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
int64_t Register2 = 0;
|
|
if (parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIRegister(Register1, Register2);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIWindowSave
|
|
/// ::= .cfi_window_save
|
|
bool AsmParser::parseDirectiveCFIWindowSave() {
|
|
getStreamer().EmitCFIWindowSave();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIAdjustCfaOffset
|
|
/// ::= .cfi_adjust_cfa_offset adjustment
|
|
bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
|
|
int64_t Adjustment = 0;
|
|
if (parseAbsoluteExpression(Adjustment))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIAdjustCfaOffset(Adjustment);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIDefCfaRegister
|
|
/// ::= .cfi_def_cfa_register register
|
|
bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIDefCfaRegister(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIOffset
|
|
/// ::= .cfi_offset register, offset
|
|
bool AsmParser::parseDirectiveCFIOffset(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 (parseAbsoluteExpression(Offset))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIOffset(Register, Offset);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRelOffset
|
|
/// ::= .cfi_rel_offset register, offset
|
|
bool AsmParser::parseDirectiveCFIRelOffset(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 (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
|
|
/// IsPersonality true for cfi_personality, false for cfi_lsda
|
|
/// ::= .cfi_personality encoding, [symbol_name]
|
|
/// ::= .cfi_lsda encoding, [symbol_name]
|
|
bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
|
|
int64_t Encoding = 0;
|
|
if (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 (parseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
|
|
|
|
if (IsPersonality)
|
|
getStreamer().EmitCFIPersonality(Sym, Encoding);
|
|
else
|
|
getStreamer().EmitCFILsda(Sym, Encoding);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRememberState
|
|
/// ::= .cfi_remember_state
|
|
bool AsmParser::parseDirectiveCFIRememberState() {
|
|
getStreamer().EmitCFIRememberState();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRestoreState
|
|
/// ::= .cfi_remember_state
|
|
bool AsmParser::parseDirectiveCFIRestoreState() {
|
|
getStreamer().EmitCFIRestoreState();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFISameValue
|
|
/// ::= .cfi_same_value register
|
|
bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().EmitCFISameValue(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRestore
|
|
/// ::= .cfi_restore register
|
|
bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIRestore(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIEscape
|
|
/// ::= .cfi_escape expression[,...]
|
|
bool AsmParser::parseDirectiveCFIEscape() {
|
|
std::string Values;
|
|
int64_t CurrValue;
|
|
if (parseAbsoluteExpression(CurrValue))
|
|
return true;
|
|
|
|
Values.push_back((uint8_t)CurrValue);
|
|
|
|
while (getLexer().is(AsmToken::Comma)) {
|
|
Lex();
|
|
|
|
if (parseAbsoluteExpression(CurrValue))
|
|
return true;
|
|
|
|
Values.push_back((uint8_t)CurrValue);
|
|
}
|
|
|
|
getStreamer().EmitCFIEscape(Values);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFISignalFrame
|
|
/// ::= .cfi_signal_frame
|
|
bool AsmParser::parseDirectiveCFISignalFrame() {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return Error(getLexer().getLoc(),
|
|
"unexpected token in '.cfi_signal_frame'");
|
|
|
|
getStreamer().EmitCFISignalFrame();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIUndefined
|
|
/// ::= .cfi_undefined register
|
|
bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().EmitCFIUndefined(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveMacrosOnOff
|
|
/// ::= .macros_on
|
|
/// ::= .macros_off
|
|
bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return Error(getLexer().getLoc(),
|
|
"unexpected token in '" + Directive + "' directive");
|
|
|
|
setMacrosEnabled(Directive == ".macros_on");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveMacro
|
|
/// ::= .macro name [parameters]
|
|
bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
|
|
StringRef Name;
|
|
if (parseIdentifier(Name))
|
|
return TokError("expected identifier in '.macro' directive");
|
|
|
|
MCAsmMacroParameters Parameters;
|
|
while (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
MCAsmMacroParameter Parameter;
|
|
if (parseIdentifier(Parameter.first))
|
|
return TokError("expected identifier in '.macro' directive");
|
|
|
|
if (getLexer().is(AsmToken::Equal)) {
|
|
Lex();
|
|
if (parseMacroArgument(Parameter.second))
|
|
return true;
|
|
}
|
|
|
|
Parameters.push_back(Parameter);
|
|
|
|
if (getLexer().is(AsmToken::Comma))
|
|
Lex();
|
|
}
|
|
|
|
// 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.
|
|
eatToEndOfStatement();
|
|
}
|
|
|
|
if (lookupMacro(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);
|
|
checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
|
|
defineMacro(Name, MCAsmMacro(Name, Body, Parameters));
|
|
return false;
|
|
}
|
|
|
|
/// checkForBadMacro
|
|
///
|
|
/// With the support added for named parameters there may be code out there that
|
|
/// is transitioning from positional parameters. In versions of gas that did
|
|
/// not support named parameters they would be ignored on the macro definition.
|
|
/// But to support both styles of parameters this is not possible so if a macro
|
|
/// definition has named parameters but does not use them and has what appears
|
|
/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
|
|
/// warning that the positional parameter found in body which have no effect.
|
|
/// Hoping the developer will either remove the named parameters from the macro
|
|
/// definition so the positional parameters get used if that was what was
|
|
/// intended or change the macro to use the named parameters. It is possible
|
|
/// this warning will trigger when the none of the named parameters are used
|
|
/// and the strings like $1 are infact to simply to be passed trough unchanged.
|
|
void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
|
|
StringRef Body,
|
|
MCAsmMacroParameters Parameters) {
|
|
// If this macro is not defined with named parameters the warning we are
|
|
// checking for here doesn't apply.
|
|
unsigned NParameters = Parameters.size();
|
|
if (NParameters == 0)
|
|
return;
|
|
|
|
bool NamedParametersFound = false;
|
|
bool PositionalParametersFound = false;
|
|
|
|
// Look at the body of the macro for use of both the named parameters and what
|
|
// are likely to be positional parameters. This is what expandMacro() is
|
|
// doing when it finds the parameters in the body.
|
|
while (!Body.empty()) {
|
|
// Scan for the next possible parameter.
|
|
std::size_t End = Body.size(), Pos = 0;
|
|
for (; Pos != End; ++Pos) {
|
|
// Check for a substitution or escape.
|
|
// This macro is defined with parameters, look for \foo, \bar, etc.
|
|
if (Body[Pos] == '\\' && Pos + 1 != End)
|
|
break;
|
|
|
|
// This macro should have parameters, but look for $0, $1, ..., $n too.
|
|
if (Body[Pos] != '$' || Pos + 1 == End)
|
|
continue;
|
|
char Next = Body[Pos + 1];
|
|
if (Next == '$' || Next == 'n' ||
|
|
isdigit(static_cast<unsigned char>(Next)))
|
|
break;
|
|
}
|
|
|
|
// Check if we reached the end.
|
|
if (Pos == End)
|
|
break;
|
|
|
|
if (Body[Pos] == '$') {
|
|
switch (Body[Pos + 1]) {
|
|
// $$ => $
|
|
case '$':
|
|
break;
|
|
|
|
// $n => number of arguments
|
|
case 'n':
|
|
PositionalParametersFound = true;
|
|
break;
|
|
|
|
// $[0-9] => argument
|
|
default: {
|
|
PositionalParametersFound = true;
|
|
break;
|
|
}
|
|
}
|
|
Pos += 2;
|
|
} else {
|
|
unsigned I = Pos + 1;
|
|
while (isIdentifierChar(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].first == Argument)
|
|
break;
|
|
|
|
if (Index == NParameters) {
|
|
if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
|
|
Pos += 3;
|
|
else {
|
|
Pos = I;
|
|
}
|
|
} else {
|
|
NamedParametersFound = true;
|
|
Pos += 1 + Argument.size();
|
|
}
|
|
}
|
|
// Update the scan point.
|
|
Body = Body.substr(Pos);
|
|
}
|
|
|
|
if (!NamedParametersFound && PositionalParametersFound)
|
|
Warning(DirectiveLoc, "macro defined with named parameters which are not "
|
|
"used in macro body, possible positional parameter "
|
|
"found in body which will have no effect");
|
|
}
|
|
|
|
/// parseDirectiveEndMacro
|
|
/// ::= .endm
|
|
/// ::= .endmacro
|
|
bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '" + Directive + "' directive");
|
|
|
|
// If we are inside a macro instantiation, terminate the current
|
|
// instantiation.
|
|
if (isInsideMacroInstantiation()) {
|
|
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 AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
|
|
StringRef Name;
|
|
if (parseIdentifier(Name))
|
|
return TokError("expected identifier in '.purgem' directive");
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.purgem' directive");
|
|
|
|
if (!lookupMacro(Name))
|
|
return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
|
|
|
|
undefineMacro(Name);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveBundleAlignMode
|
|
/// ::= {.bundle_align_mode} expression
|
|
bool AsmParser::parseDirectiveBundleAlignMode() {
|
|
checkForValidSection();
|
|
|
|
// Expect a single argument: an expression that evaluates to a constant
|
|
// in the inclusive range 0-30.
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
int64_t AlignSizePow2;
|
|
if (parseAbsoluteExpression(AlignSizePow2))
|
|
return true;
|
|
else if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token after expression in"
|
|
" '.bundle_align_mode' directive");
|
|
else if (AlignSizePow2 < 0 || AlignSizePow2 > 30)
|
|
return Error(ExprLoc,
|
|
"invalid bundle alignment size (expected between 0 and 30)");
|
|
|
|
Lex();
|
|
|
|
// Because of AlignSizePow2's verified range we can safely truncate it to
|
|
// unsigned.
|
|
getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveBundleLock
|
|
/// ::= {.bundle_lock} [align_to_end]
|
|
bool AsmParser::parseDirectiveBundleLock() {
|
|
checkForValidSection();
|
|
bool AlignToEnd = false;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
StringRef Option;
|
|
SMLoc Loc = getTok().getLoc();
|
|
const char *kInvalidOptionError =
|
|
"invalid option for '.bundle_lock' directive";
|
|
|
|
if (parseIdentifier(Option))
|
|
return Error(Loc, kInvalidOptionError);
|
|
|
|
if (Option != "align_to_end")
|
|
return Error(Loc, kInvalidOptionError);
|
|
else if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return Error(Loc,
|
|
"unexpected token after '.bundle_lock' directive option");
|
|
AlignToEnd = true;
|
|
}
|
|
|
|
Lex();
|
|
|
|
getStreamer().EmitBundleLock(AlignToEnd);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveBundleLock
|
|
/// ::= {.bundle_lock}
|
|
bool AsmParser::parseDirectiveBundleUnlock() {
|
|
checkForValidSection();
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.bundle_unlock' directive");
|
|
Lex();
|
|
|
|
getStreamer().EmitBundleUnlock();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveSpace
|
|
/// ::= (.skip | .space) expression [ , expression ]
|
|
bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
|
|
checkForValidSection();
|
|
|
|
int64_t NumBytes;
|
|
if (parseAbsoluteExpression(NumBytes))
|
|
return true;
|
|
|
|
int64_t FillExpr = 0;
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
|
|
Lex();
|
|
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
|
|
}
|
|
|
|
Lex();
|
|
|
|
if (NumBytes <= 0)
|
|
return TokError("invalid number of bytes in '" + Twine(IDVal) +
|
|
"' directive");
|
|
|
|
// FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
|
|
getStreamer().EmitFill(NumBytes, FillExpr);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveLEB128
|
|
/// ::= (.sleb128 | .uleb128) expression
|
|
bool AsmParser::parseDirectiveLEB128(bool Signed) {
|
|
checkForValidSection();
|
|
const MCExpr *Value;
|
|
|
|
if (parseExpression(Value))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in directive");
|
|
|
|
if (Signed)
|
|
getStreamer().EmitSLEB128Value(Value);
|
|
else
|
|
getStreamer().EmitULEB128Value(Value);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveSymbolAttribute
|
|
/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
|
|
bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
for (;;) {
|
|
StringRef Name;
|
|
SMLoc Loc = getTok().getLoc();
|
|
|
|
if (parseIdentifier(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");
|
|
|
|
if (!getStreamer().EmitSymbolAttribute(Sym, Attr))
|
|
return Error(Loc, "unable to emit symbol attribute");
|
|
|
|
if (getLexer().is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
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 = getContext().GetOrCreateSymbol(Name);
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
int64_t Size;
|
|
SMLoc SizeLoc = getLexer().getLoc();
|
|
if (parseAbsoluteExpression(Size))
|
|
return true;
|
|
|
|
int64_t Pow2Alignment = 0;
|
|
SMLoc Pow2AlignmentLoc;
|
|
if (getLexer().is(AsmToken::Comma)) {
|
|
Lex();
|
|
Pow2AlignmentLoc = getLexer().getLoc();
|
|
if (parseAbsoluteExpression(Pow2Alignment))
|
|
return true;
|
|
|
|
LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
|
|
if (IsLocal && LCOMM == LCOMM::NoAlignment)
|
|
return Error(Pow2AlignmentLoc, "alignment not supported on this target");
|
|
|
|
// If this target takes alignments in bytes (not log) validate and convert.
|
|
if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
|
|
(IsLocal && LCOMM == LCOMM::ByteAlignment)) {
|
|
if (!isPowerOf2_64(Pow2Alignment))
|
|
return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
|
|
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
|
|
// but a size of .lcomm creates a bss symbol of size zero.
|
|
if (Size < 0)
|
|
return Error(SizeLoc, "invalid '.comm' or '.lcomm' 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 '.comm' or '.lcomm' directive "
|
|
"alignment, can't be less than zero");
|
|
|
|
if (!Sym->isUndefined())
|
|
return Error(IDLoc, "invalid symbol redefinition");
|
|
|
|
// Create the Symbol as a common or local common with Size and Pow2Alignment
|
|
if (IsLocal) {
|
|
getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
|
|
return false;
|
|
}
|
|
|
|
getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
|
|
return false;
|
|
}
|
|
|
|
/// 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");
|
|
|
|
Lex();
|
|
|
|
if (Str.empty())
|
|
Error(Loc, ".abort detected. Assembly stopping.");
|
|
else
|
|
Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
|
|
// FIXME: Actually abort assembly here.
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveInclude
|
|
/// ::= .include "filename"
|
|
bool AsmParser::parseDirectiveInclude() {
|
|
if (getLexer().isNot(AsmToken::String))
|
|
return TokError("expected string in '.include' directive");
|
|
|
|
// Allow the strings to have escaped octal character sequence.
|
|
std::string Filename;
|
|
if (parseEscapedString(Filename))
|
|
return true;
|
|
SMLoc IncludeLoc = getLexer().getLoc();
|
|
Lex();
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.include' directive");
|
|
|
|
// 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;
|
|
}
|
|
|
|
/// parseDirectiveIncbin
|
|
/// ::= .incbin "filename"
|
|
bool AsmParser::parseDirectiveIncbin() {
|
|
if (getLexer().isNot(AsmToken::String))
|
|
return TokError("expected string in '.incbin' directive");
|
|
|
|
// Allow the strings to have escaped octal character sequence.
|
|
std::string Filename;
|
|
if (parseEscapedString(Filename))
|
|
return true;
|
|
SMLoc IncbinLoc = getLexer().getLoc();
|
|
Lex();
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.incbin' directive");
|
|
|
|
// Attempt to process the included file.
|
|
if (processIncbinFile(Filename)) {
|
|
Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// 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;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.if' directive");
|
|
|
|
Lex();
|
|
|
|
TheCondState.CondMet = ExprValue;
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIfb
|
|
/// ::= .ifb string
|
|
bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
} else {
|
|
StringRef Str = parseStringToEndOfStatement();
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.ifb' directive");
|
|
|
|
Lex();
|
|
|
|
TheCondState.CondMet = ExpectBlank == Str.empty();
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIfc
|
|
/// ::= .ifc string1, string2
|
|
bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
} else {
|
|
StringRef Str1 = parseStringToComma();
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.ifc' directive");
|
|
|
|
Lex();
|
|
|
|
StringRef Str2 = parseStringToEndOfStatement();
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.ifc' directive");
|
|
|
|
Lex();
|
|
|
|
TheCondState.CondMet = ExpectEqual == (Str1 == Str2);
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIfdef
|
|
/// ::= .ifdef symbol
|
|
bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
|
|
StringRef Name;
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
} else {
|
|
if (parseIdentifier(Name))
|
|
return TokError("expected identifier after '.ifdef'");
|
|
|
|
Lex();
|
|
|
|
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;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveElseIf
|
|
/// ::= .elseif expression
|
|
bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
|
|
if (TheCondState.TheCond != AsmCond::IfCond &&
|
|
TheCondState.TheCond != AsmCond::ElseIfCond)
|
|
Error(DirectiveLoc, "Encountered a .elseif that doesn't follow a .if or "
|
|
" an .elseif");
|
|
TheCondState.TheCond = AsmCond::ElseIfCond;
|
|
|
|
bool LastIgnoreState = false;
|
|
if (!TheCondStack.empty())
|
|
LastIgnoreState = TheCondStack.back().Ignore;
|
|
if (LastIgnoreState || TheCondState.CondMet) {
|
|
TheCondState.Ignore = true;
|
|
eatToEndOfStatement();
|
|
} else {
|
|
int64_t ExprValue;
|
|
if (parseAbsoluteExpression(ExprValue))
|
|
return true;
|
|
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.elseif' directive");
|
|
|
|
Lex();
|
|
TheCondState.CondMet = ExprValue;
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveElse
|
|
/// ::= .else
|
|
bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.else' directive");
|
|
|
|
Lex();
|
|
|
|
if (TheCondState.TheCond != AsmCond::IfCond &&
|
|
TheCondState.TheCond != AsmCond::ElseIfCond)
|
|
Error(DirectiveLoc, "Encountered a .else that doesn't follow a .if or an "
|
|
".elseif");
|
|
TheCondState.TheCond = AsmCond::ElseCond;
|
|
bool LastIgnoreState = false;
|
|
if (!TheCondStack.empty())
|
|
LastIgnoreState = TheCondStack.back().Ignore;
|
|
if (LastIgnoreState || TheCondState.CondMet)
|
|
TheCondState.Ignore = true;
|
|
else
|
|
TheCondState.Ignore = false;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveEnd
|
|
/// ::= .end
|
|
bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.end' directive");
|
|
|
|
Lex();
|
|
|
|
while (Lexer.isNot(AsmToken::Eof))
|
|
Lex();
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveEndIf
|
|
/// ::= .endif
|
|
bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.endif' directive");
|
|
|
|
Lex();
|
|
|
|
if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
|
|
Error(DirectiveLoc, "Encountered a .endif that doesn't follow a .if or "
|
|
".else");
|
|
if (!TheCondStack.empty()) {
|
|
TheCondState = TheCondStack.back();
|
|
TheCondStack.pop_back();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void AsmParser::initializeDirectiveKindMap() {
|
|
DirectiveKindMap[".set"] = DK_SET;
|
|
DirectiveKindMap[".equ"] = DK_EQU;
|
|
DirectiveKindMap[".equiv"] = DK_EQUIV;
|
|
DirectiveKindMap[".ascii"] = DK_ASCII;
|
|
DirectiveKindMap[".asciz"] = DK_ASCIZ;
|
|
DirectiveKindMap[".string"] = DK_STRING;
|
|
DirectiveKindMap[".byte"] = DK_BYTE;
|
|
DirectiveKindMap[".short"] = DK_SHORT;
|
|
DirectiveKindMap[".value"] = DK_VALUE;
|
|
DirectiveKindMap[".2byte"] = DK_2BYTE;
|
|
DirectiveKindMap[".long"] = DK_LONG;
|
|
DirectiveKindMap[".int"] = DK_INT;
|
|
DirectiveKindMap[".4byte"] = DK_4BYTE;
|
|
DirectiveKindMap[".quad"] = DK_QUAD;
|
|
DirectiveKindMap[".8byte"] = DK_8BYTE;
|
|
DirectiveKindMap[".octa"] = DK_OCTA;
|
|
DirectiveKindMap[".single"] = DK_SINGLE;
|
|
DirectiveKindMap[".float"] = DK_FLOAT;
|
|
DirectiveKindMap[".double"] = DK_DOUBLE;
|
|
DirectiveKindMap[".align"] = DK_ALIGN;
|
|
DirectiveKindMap[".align32"] = DK_ALIGN32;
|
|
DirectiveKindMap[".balign"] = DK_BALIGN;
|
|
DirectiveKindMap[".balignw"] = DK_BALIGNW;
|
|
DirectiveKindMap[".balignl"] = DK_BALIGNL;
|
|
DirectiveKindMap[".p2align"] = DK_P2ALIGN;
|
|
DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
|
|
DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
|
|
DirectiveKindMap[".org"] = DK_ORG;
|
|
DirectiveKindMap[".fill"] = DK_FILL;
|
|
DirectiveKindMap[".zero"] = DK_ZERO;
|
|
DirectiveKindMap[".extern"] = DK_EXTERN;
|
|
DirectiveKindMap[".globl"] = DK_GLOBL;
|
|
DirectiveKindMap[".global"] = DK_GLOBAL;
|
|
DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
|
|
DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
|
|
DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
|
|
DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
|
|
DirectiveKindMap[".reference"] = DK_REFERENCE;
|
|
DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
|
|
DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
|
|
DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
|
|
DirectiveKindMap[".comm"] = DK_COMM;
|
|
DirectiveKindMap[".common"] = DK_COMMON;
|
|
DirectiveKindMap[".lcomm"] = DK_LCOMM;
|
|
DirectiveKindMap[".abort"] = DK_ABORT;
|
|
DirectiveKindMap[".include"] = DK_INCLUDE;
|
|
DirectiveKindMap[".incbin"] = DK_INCBIN;
|
|
DirectiveKindMap[".code16"] = DK_CODE16;
|
|
DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
|
|
DirectiveKindMap[".rept"] = DK_REPT;
|
|
DirectiveKindMap[".rep"] = DK_REPT;
|
|
DirectiveKindMap[".irp"] = DK_IRP;
|
|
DirectiveKindMap[".irpc"] = DK_IRPC;
|
|
DirectiveKindMap[".endr"] = DK_ENDR;
|
|
DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
|
|
DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
|
|
DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
|
|
DirectiveKindMap[".if"] = DK_IF;
|
|
DirectiveKindMap[".ifb"] = DK_IFB;
|
|
DirectiveKindMap[".ifnb"] = DK_IFNB;
|
|
DirectiveKindMap[".ifc"] = DK_IFC;
|
|
DirectiveKindMap[".ifnc"] = DK_IFNC;
|
|
DirectiveKindMap[".ifdef"] = DK_IFDEF;
|
|
DirectiveKindMap[".ifndef"] = DK_IFNDEF;
|
|
DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
|
|
DirectiveKindMap[".elseif"] = DK_ELSEIF;
|
|
DirectiveKindMap[".else"] = DK_ELSE;
|
|
DirectiveKindMap[".end"] = DK_END;
|
|
DirectiveKindMap[".endif"] = DK_ENDIF;
|
|
DirectiveKindMap[".skip"] = DK_SKIP;
|
|
DirectiveKindMap[".space"] = DK_SPACE;
|
|
DirectiveKindMap[".file"] = DK_FILE;
|
|
DirectiveKindMap[".line"] = DK_LINE;
|
|
DirectiveKindMap[".loc"] = DK_LOC;
|
|
DirectiveKindMap[".stabs"] = DK_STABS;
|
|
DirectiveKindMap[".sleb128"] = DK_SLEB128;
|
|
DirectiveKindMap[".uleb128"] = DK_ULEB128;
|
|
DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
|
|
DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
|
|
DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
|
|
DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
|
|
DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
|
|
DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
|
|
DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
|
|
DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
|
|
DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
|
|
DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
|
|
DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
|
|
DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
|
|
DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
|
|
DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
|
|
DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
|
|
DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
|
|
DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
|
|
DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
|
|
DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
|
|
DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
|
|
DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
|
|
DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
|
|
DirectiveKindMap[".macro"] = DK_MACRO;
|
|
DirectiveKindMap[".endm"] = DK_ENDM;
|
|
DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
|
|
DirectiveKindMap[".purgem"] = DK_PURGEM;
|
|
}
|
|
|
|
MCAsmMacro *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;
|
|
MCAsmMacroParameters Parameters;
|
|
MacroLikeBodies.push_back(MCAsmMacro(Name, Body, Parameters));
|
|
return &MacroLikeBodies.back();
|
|
}
|
|
|
|
void AsmParser::instantiateMacroLikeBody(MCAsmMacro *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, CurBuffer, 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();
|
|
}
|
|
|
|
/// parseDirectiveRept
|
|
/// ::= .rep | .rept count
|
|
bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
|
|
const MCExpr *CountExpr;
|
|
SMLoc CountLoc = getTok().getLoc();
|
|
if (parseExpression(CountExpr))
|
|
return true;
|
|
|
|
int64_t Count;
|
|
if (!CountExpr->EvaluateAsAbsolute(Count)) {
|
|
eatToEndOfStatement();
|
|
return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
|
|
}
|
|
|
|
if (Count < 0)
|
|
return Error(CountLoc, "Count is negative");
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '" + Dir + "' directive");
|
|
|
|
// Eat the end of statement.
|
|
Lex();
|
|
|
|
// Lex the rept definition.
|
|
MCAsmMacro *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;
|
|
MCAsmMacroParameters Parameters;
|
|
MCAsmMacroArguments 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;
|
|
}
|
|
|
|
/// parseDirectiveIrp
|
|
/// ::= .irp symbol,values
|
|
bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
|
|
MCAsmMacroParameters Parameters;
|
|
MCAsmMacroParameter Parameter;
|
|
|
|
if (parseIdentifier(Parameter.first))
|
|
return TokError("expected identifier in '.irp' directive");
|
|
|
|
Parameters.push_back(Parameter);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("expected comma in '.irp' directive");
|
|
|
|
Lex();
|
|
|
|
MCAsmMacroArguments A;
|
|
if (parseMacroArguments(0, A))
|
|
return true;
|
|
|
|
// Eat the end of statement.
|
|
Lex();
|
|
|
|
// Lex the irp definition.
|
|
MCAsmMacro *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;
|
|
raw_svector_ostream OS(Buf);
|
|
|
|
for (MCAsmMacroArguments::iterator i = A.begin(), e = A.end(); i != e; ++i) {
|
|
MCAsmMacroArguments Args;
|
|
Args.push_back(*i);
|
|
|
|
if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
|
|
return true;
|
|
}
|
|
|
|
instantiateMacroLikeBody(M, DirectiveLoc, OS);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIrpc
|
|
/// ::= .irpc symbol,values
|
|
bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
|
|
MCAsmMacroParameters Parameters;
|
|
MCAsmMacroParameter Parameter;
|
|
|
|
if (parseIdentifier(Parameter.first))
|
|
return TokError("expected identifier in '.irpc' directive");
|
|
|
|
Parameters.push_back(Parameter);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("expected comma in '.irpc' directive");
|
|
|
|
Lex();
|
|
|
|
MCAsmMacroArguments A;
|
|
if (parseMacroArguments(0, A))
|
|
return true;
|
|
|
|
if (A.size() != 1 || A.front().size() != 1)
|
|
return TokError("unexpected token in '.irpc' directive");
|
|
|
|
// Eat the end of statement.
|
|
Lex();
|
|
|
|
// Lex the irpc definition.
|
|
MCAsmMacro *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;
|
|
raw_svector_ostream OS(Buf);
|
|
|
|
StringRef Values = A.front().front().getString();
|
|
std::size_t I, End = Values.size();
|
|
for (I = 0; I < End; ++I) {
|
|
MCAsmMacroArgument Arg;
|
|
Arg.push_back(AsmToken(AsmToken::Identifier, Values.slice(I, I + 1)));
|
|
|
|
MCAsmMacroArguments Args;
|
|
Args.push_back(Arg);
|
|
|
|
if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
|
|
return true;
|
|
}
|
|
|
|
instantiateMacroLikeBody(M, DirectiveLoc, OS);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
|
|
if (ActiveMacros.empty())
|
|
return TokError("unmatched '.endr' directive");
|
|
|
|
// The only .repl that should get here are the ones created by
|
|
// instantiateMacroLikeBody.
|
|
assert(getLexer().is(AsmToken::EndOfStatement));
|
|
|
|
handleMacroExit();
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
|
|
size_t Len) {
|
|
const MCExpr *Value;
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
if (parseExpression(Value))
|
|
return true;
|
|
const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
|
|
if (!MCE)
|
|
return Error(ExprLoc, "unexpected expression in _emit");
|
|
uint64_t IntValue = MCE->getValue();
|
|
if (!isUIntN(8, IntValue) && !isIntN(8, IntValue))
|
|
return Error(ExprLoc, "literal value out of range for directive");
|
|
|
|
Info.AsmRewrites->push_back(AsmRewrite(AOK_Emit, IDLoc, Len));
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
|
|
const MCExpr *Value;
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
if (parseExpression(Value))
|
|
return true;
|
|
const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
|
|
if (!MCE)
|
|
return Error(ExprLoc, "unexpected expression in align");
|
|
uint64_t IntValue = MCE->getValue();
|
|
if (!isPowerOf2_64(IntValue))
|
|
return Error(ExprLoc, "literal value not a power of two greater then zero");
|
|
|
|
Info.AsmRewrites->push_back(
|
|
AsmRewrite(AOK_Align, IDLoc, 5, Log2_64(IntValue)));
|
|
return false;
|
|
}
|
|
|
|
// We are comparing pointers, but the pointers are relative to a single string.
|
|
// Thus, this should always be deterministic.
|
|
static int rewritesSort(const AsmRewrite *AsmRewriteA,
|
|
const AsmRewrite *AsmRewriteB) {
|
|
if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
|
|
return -1;
|
|
if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
|
|
return 1;
|
|
|
|
// It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
|
|
// rewrite to the same location. Make sure the SizeDirective rewrite is
|
|
// performed first, then the Imm/ImmPrefix and finally the Input/Output. This
|
|
// ensures the sort algorithm is stable.
|
|
if (AsmRewritePrecedence[AsmRewriteA->Kind] >
|
|
AsmRewritePrecedence[AsmRewriteB->Kind])
|
|
return -1;
|
|
|
|
if (AsmRewritePrecedence[AsmRewriteA->Kind] <
|
|
AsmRewritePrecedence[AsmRewriteB->Kind])
|
|
return 1;
|
|
llvm_unreachable("Unstable rewrite sort.");
|
|
}
|
|
|
|
bool AsmParser::parseMSInlineAsm(
|
|
void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
|
|
unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool> > &OpDecls,
|
|
SmallVectorImpl<std::string> &Constraints,
|
|
SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
|
|
const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
|
|
SmallVector<void *, 4> InputDecls;
|
|
SmallVector<void *, 4> OutputDecls;
|
|
SmallVector<bool, 4> InputDeclsAddressOf;
|
|
SmallVector<bool, 4> OutputDeclsAddressOf;
|
|
SmallVector<std::string, 4> InputConstraints;
|
|
SmallVector<std::string, 4> OutputConstraints;
|
|
SmallVector<unsigned, 4> ClobberRegs;
|
|
|
|
SmallVector<AsmRewrite, 4> AsmStrRewrites;
|
|
|
|
// Prime the lexer.
|
|
Lex();
|
|
|
|
// While we have input, parse each statement.
|
|
unsigned InputIdx = 0;
|
|
unsigned OutputIdx = 0;
|
|
while (getLexer().isNot(AsmToken::Eof)) {
|
|
ParseStatementInfo Info(&AsmStrRewrites);
|
|
if (parseStatement(Info))
|
|
return true;
|
|
|
|
if (Info.ParseError)
|
|
return true;
|
|
|
|
if (Info.Opcode == ~0U)
|
|
continue;
|
|
|
|
const MCInstrDesc &Desc = MII->get(Info.Opcode);
|
|
|
|
// Build the list of clobbers, outputs and inputs.
|
|
for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
|
|
MCParsedAsmOperand *Operand = Info.ParsedOperands[i];
|
|
|
|
// Immediate.
|
|
if (Operand->isImm())
|
|
continue;
|
|
|
|
// Register operand.
|
|
if (Operand->isReg() && !Operand->needAddressOf()) {
|
|
unsigned NumDefs = Desc.getNumDefs();
|
|
// Clobber.
|
|
if (NumDefs && Operand->getMCOperandNum() < NumDefs)
|
|
ClobberRegs.push_back(Operand->getReg());
|
|
continue;
|
|
}
|
|
|
|
// Expr/Input or Output.
|
|
StringRef SymName = Operand->getSymName();
|
|
if (SymName.empty())
|
|
continue;
|
|
|
|
void *OpDecl = Operand->getOpDecl();
|
|
if (!OpDecl)
|
|
continue;
|
|
|
|
bool isOutput = (i == 1) && Desc.mayStore();
|
|
SMLoc Start = SMLoc::getFromPointer(SymName.data());
|
|
if (isOutput) {
|
|
++InputIdx;
|
|
OutputDecls.push_back(OpDecl);
|
|
OutputDeclsAddressOf.push_back(Operand->needAddressOf());
|
|
OutputConstraints.push_back('=' + Operand->getConstraint().str());
|
|
AsmStrRewrites.push_back(AsmRewrite(AOK_Output, Start, SymName.size()));
|
|
} else {
|
|
InputDecls.push_back(OpDecl);
|
|
InputDeclsAddressOf.push_back(Operand->needAddressOf());
|
|
InputConstraints.push_back(Operand->getConstraint().str());
|
|
AsmStrRewrites.push_back(AsmRewrite(AOK_Input, Start, SymName.size()));
|
|
}
|
|
}
|
|
|
|
// Consider implicit defs to be clobbers. Think of cpuid and push.
|
|
const uint16_t *ImpDefs = Desc.getImplicitDefs();
|
|
for (unsigned I = 0, E = Desc.getNumImplicitDefs(); I != E; ++I)
|
|
ClobberRegs.push_back(ImpDefs[I]);
|
|
}
|
|
|
|
// Set the number of Outputs and Inputs.
|
|
NumOutputs = OutputDecls.size();
|
|
NumInputs = InputDecls.size();
|
|
|
|
// Set the unique clobbers.
|
|
array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
|
|
ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
|
|
ClobberRegs.end());
|
|
Clobbers.assign(ClobberRegs.size(), std::string());
|
|
for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
|
|
raw_string_ostream OS(Clobbers[I]);
|
|
IP->printRegName(OS, ClobberRegs[I]);
|
|
}
|
|
|
|
// Merge the various outputs and inputs. Output are expected first.
|
|
if (NumOutputs || NumInputs) {
|
|
unsigned NumExprs = NumOutputs + NumInputs;
|
|
OpDecls.resize(NumExprs);
|
|
Constraints.resize(NumExprs);
|
|
for (unsigned i = 0; i < NumOutputs; ++i) {
|
|
OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
|
|
Constraints[i] = OutputConstraints[i];
|
|
}
|
|
for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
|
|
OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
|
|
Constraints[j] = InputConstraints[i];
|
|
}
|
|
}
|
|
|
|
// Build the IR assembly string.
|
|
std::string AsmStringIR;
|
|
raw_string_ostream OS(AsmStringIR);
|
|
const char *AsmStart = SrcMgr.getMemoryBuffer(0)->getBufferStart();
|
|
const char *AsmEnd = SrcMgr.getMemoryBuffer(0)->getBufferEnd();
|
|
array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
|
|
for (SmallVectorImpl<AsmRewrite>::iterator I = AsmStrRewrites.begin(),
|
|
E = AsmStrRewrites.end();
|
|
I != E; ++I) {
|
|
AsmRewriteKind Kind = (*I).Kind;
|
|
if (Kind == AOK_Delete)
|
|
continue;
|
|
|
|
const char *Loc = (*I).Loc.getPointer();
|
|
assert(Loc >= AsmStart && "Expected Loc to be at or after Start!");
|
|
|
|
// Emit everything up to the immediate/expression.
|
|
unsigned Len = Loc - AsmStart;
|
|
if (Len)
|
|
OS << StringRef(AsmStart, Len);
|
|
|
|
// Skip the original expression.
|
|
if (Kind == AOK_Skip) {
|
|
AsmStart = Loc + (*I).Len;
|
|
continue;
|
|
}
|
|
|
|
unsigned AdditionalSkip = 0;
|
|
// Rewrite expressions in $N notation.
|
|
switch (Kind) {
|
|
default:
|
|
break;
|
|
case AOK_Imm:
|
|
OS << "$$" << (*I).Val;
|
|
break;
|
|
case AOK_ImmPrefix:
|
|
OS << "$$";
|
|
break;
|
|
case AOK_Input:
|
|
OS << '$' << InputIdx++;
|
|
break;
|
|
case AOK_Output:
|
|
OS << '$' << OutputIdx++;
|
|
break;
|
|
case AOK_SizeDirective:
|
|
switch ((*I).Val) {
|
|
default: break;
|
|
case 8: OS << "byte ptr "; break;
|
|
case 16: OS << "word ptr "; break;
|
|
case 32: OS << "dword ptr "; break;
|
|
case 64: OS << "qword ptr "; break;
|
|
case 80: OS << "xword ptr "; break;
|
|
case 128: OS << "xmmword ptr "; break;
|
|
case 256: OS << "ymmword ptr "; break;
|
|
}
|
|
break;
|
|
case AOK_Emit:
|
|
OS << ".byte";
|
|
break;
|
|
case AOK_Align: {
|
|
unsigned Val = (*I).Val;
|
|
OS << ".align " << Val;
|
|
|
|
// Skip the original immediate.
|
|
assert(Val < 10 && "Expected alignment less then 2^10.");
|
|
AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
|
|
break;
|
|
}
|
|
case AOK_DotOperator:
|
|
OS << (*I).Val;
|
|
break;
|
|
}
|
|
|
|
// Skip the original expression.
|
|
AsmStart = Loc + (*I).Len + AdditionalSkip;
|
|
}
|
|
|
|
// Emit the remainder of the asm string.
|
|
if (AsmStart != AsmEnd)
|
|
OS << StringRef(AsmStart, AsmEnd - AsmStart);
|
|
|
|
AsmString = OS.str();
|
|
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);
|
|
}
|