//
//===----------------------------------------------------------------------===//
-#include "llvm/MC/MCParser/AsmParser.h"
#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCParser/AsmCond.h"
+#include "llvm/MC/MCParser/AsmLexer.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCDwarf.h"
#include "llvm/Support/Compiler.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetAsmParser.h"
+#include <vector>
using namespace llvm;
+namespace {
-enum { DEFAULT_ADDRSPACE = 0 };
+/// \brief Helper class for tracking macro definitions.
+struct Macro {
+ StringRef Name;
+ StringRef Body;
+
+public:
+ Macro(StringRef N, StringRef B) : Name(N), Body(B) {}
+};
+
+/// \brief Helper class for storing information about an active macro
+/// instantiation.
+struct MacroInstantiation {
+ /// The macro being instantiated.
+ const Macro *TheMacro;
+
+ /// The macro instantiation with substitutions.
+ MemoryBuffer *Instantiation;
+
+ /// The location of the instantiation.
+ SMLoc InstantiationLoc;
+
+ /// The location where parsing should resume upon instantiation completion.
+ SMLoc ExitLoc;
+
+public:
+ MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL,
+ const std::vector<std::vector<AsmToken> > &A);
+};
+
+/// \brief The concrete assembly parser instance.
+class AsmParser : public MCAsmParser {
+ friend class GenericAsmParser;
+
+ AsmParser(const AsmParser &); // DO NOT IMPLEMENT
+ void operator=(const AsmParser &); // DO NOT IMPLEMENT
+private:
+ AsmLexer Lexer;
+ MCContext &Ctx;
+ MCStreamer &Out;
+ SourceMgr &SrcMgr;
+ MCAsmParserExtension *GenericParser;
+ MCAsmParserExtension *PlatformParser;
+
+ /// This is the current buffer index we're lexing from as managed by the
+ /// SourceMgr object.
+ int CurBuffer;
+
+ AsmCond TheCondState;
+ std::vector<AsmCond> TheCondStack;
+
+ /// DirectiveMap - This is a table handlers for directives. Each handler is
+ /// invoked after the directive identifier is read and is responsible for
+ /// parsing and validating the rest of the directive. The handler is passed
+ /// in the directive name and the location of the directive keyword.
+ StringMap<std::pair<MCAsmParserExtension*, DirectiveHandler> > DirectiveMap;
+
+ /// MacroMap - Map of currently defined macros.
+ StringMap<Macro*> MacroMap;
+
+ /// ActiveMacros - Stack of active macro instantiations.
+ std::vector<MacroInstantiation*> ActiveMacros;
+
+ /// Boolean tracking whether macro substitution is enabled.
+ unsigned MacrosEnabled : 1;
+
+public:
+ AsmParser(const Target &T, SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
+ const MCAsmInfo &MAI);
+ ~AsmParser();
+
+ virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false);
+
+ void AddDirectiveHandler(MCAsmParserExtension *Object,
+ StringRef Directive,
+ DirectiveHandler Handler) {
+ DirectiveMap[Directive] = std::make_pair(Object, Handler);
+ }
-AsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx, MCStreamer &_Out,
- const MCAsmInfo &_MAI)
- : Lexer(_MAI), Ctx(_Ctx), Out(_Out), SrcMgr(_SM), TargetParser(0),
- CurBuffer(0) {
- Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+public:
+ /// @name MCAsmParser Interface
+ /// {
+
+ virtual SourceMgr &getSourceManager() { return SrcMgr; }
+ virtual MCAsmLexer &getLexer() { return Lexer; }
+ virtual MCContext &getContext() { return Ctx; }
+ virtual MCStreamer &getStreamer() { return Out; }
+
+ virtual void Warning(SMLoc L, const Twine &Meg);
+ virtual bool Error(SMLoc L, const Twine &Msg);
+
+ const AsmToken &Lex();
+
+ bool ParseExpression(const MCExpr *&Res);
+ virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc);
+ virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc);
+ virtual bool ParseAbsoluteExpression(int64_t &Res);
+
+ /// }
+
+private:
+ bool ParseStatement();
+
+ bool HandleMacroEntry(StringRef Name, SMLoc NameLoc, const Macro *M);
+ void HandleMacroExit();
+
+ void PrintMacroInstantiations();
+ void PrintMessage(SMLoc Loc, const std::string &Msg, const char *Type) const;
+
+ /// EnterIncludeFile - Enter the specified file. This returns true on failure.
+ bool EnterIncludeFile(const std::string &Filename);
+
+ /// \brief Reset the current lexer position to that given by \arg Loc. The
+ /// current token is not set; clients should ensure Lex() is called
+ /// subsequently.
+ void JumpToLoc(SMLoc Loc);
+
+ void EatToEndOfStatement();
+
+ /// \brief Parse up to the end of statement and a return the contents from the
+ /// current token until the end of the statement; the current token on exit
+ /// will be either the EndOfStatement or EOF.
+ StringRef ParseStringToEndOfStatement();
+
+ bool ParseAssignment(StringRef Name);
+
+ bool ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
+
+ /// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
+ /// and set \arg Res to the identifier contents.
+ bool ParseIdentifier(StringRef &Res);
- // Debugging directives.
- AddDirectiveHandler(".file", &AsmParser::ParseDirectiveFile);
- AddDirectiveHandler(".line", &AsmParser::ParseDirectiveLine);
- AddDirectiveHandler(".loc", &AsmParser::ParseDirectiveLoc);
+ // Directive Parsing.
+ bool ParseDirectiveAscii(bool ZeroTerminated); // ".ascii", ".asciiz"
+ bool ParseDirectiveValue(unsigned Size); // ".byte", ".long", ...
+ bool ParseDirectiveFill(); // ".fill"
+ bool ParseDirectiveSpace(); // ".space"
+ bool ParseDirectiveSet(); // ".set"
+ bool ParseDirectiveOrg(); // ".org"
+ // ".align{,32}", ".p2align{,w,l}"
+ bool ParseDirectiveAlign(bool IsPow2, unsigned ValueSize);
+
+ /// ParseDirectiveSymbolAttribute - Parse a directive like ".globl" which
+ /// accepts a single symbol (which should be a label or an external).
+ bool ParseDirectiveSymbolAttribute(MCSymbolAttr Attr);
+ bool ParseDirectiveELFType(); // ELF specific ".type"
+
+ bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
+
+ bool ParseDirectiveAbort(); // ".abort"
+ bool ParseDirectiveInclude(); // ".include"
+
+ bool ParseDirectiveIf(SMLoc DirectiveLoc); // ".if"
+ bool ParseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
+ bool ParseDirectiveElse(SMLoc DirectiveLoc); // ".else"
+ bool ParseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
+
+ /// ParseEscapedString - Parse the current token as a string which may include
+ /// escaped characters and return the string contents.
+ bool ParseEscapedString(std::string &Data);
+};
+
+/// \brief Generic implementations of directive handling, etc. which is shared
+/// (or the default, at least) for all assembler parser.
+class GenericAsmParser : public MCAsmParserExtension {
+ template<bool (GenericAsmParser::*Handler)(StringRef, SMLoc)>
+ void AddDirectiveHandler(StringRef Directive) {
+ getParser().AddDirectiveHandler(this, Directive,
+ HandleDirective<GenericAsmParser, Handler>);
+ }
+
+public:
+ GenericAsmParser() {}
+
+ AsmParser &getParser() {
+ return (AsmParser&) this->MCAsmParserExtension::getParser();
+ }
+
+ virtual void Initialize(MCAsmParser &Parser) {
+ // Call the base implementation.
+ this->MCAsmParserExtension::Initialize(Parser);
+
+ // Debugging directives.
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveFile>(".file");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLine>(".line");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLoc>(".loc");
+
+ // Macro directives.
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
+ ".macros_on");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
+ ".macros_off");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacro>(".macro");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endm");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endmacro");
+ }
+
+ bool ParseDirectiveFile(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc);
+
+ bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveEndMacro(StringRef, SMLoc DirectiveLoc);
+};
+
}
+namespace llvm {
+extern MCAsmParserExtension *createDarwinAsmParser();
+extern MCAsmParserExtension *createELFAsmParser();
+
+}
+
+enum { DEFAULT_ADDRSPACE = 0 };
+
+AsmParser::AsmParser(const Target &T, SourceMgr &_SM, MCContext &_Ctx,
+ MCStreamer &_Out, const MCAsmInfo &_MAI)
+ : Lexer(_MAI), Ctx(_Ctx), Out(_Out), SrcMgr(_SM),
+ GenericParser(new GenericAsmParser), PlatformParser(0),
+ CurBuffer(0), MacrosEnabled(true) {
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+
+ // Initialize the generic parser.
+ GenericParser->Initialize(*this);
+
+ // Initialize the platform / file format parser.
+ //
+ // FIXME: This is a hack, we need to (majorly) cleanup how these objects are
+ // created.
+ if (_MAI.hasSubsectionsViaSymbols()) {
+ PlatformParser = createDarwinAsmParser();
+ PlatformParser->Initialize(*this);
+ } else {
+ PlatformParser = createELFAsmParser();
+ PlatformParser->Initialize(*this);
+ }
+}
AsmParser::~AsmParser() {
+ delete PlatformParser;
+ delete GenericParser;
+}
+
+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, "while in macro instantiation",
+ "note");
}
void AsmParser::Warning(SMLoc L, const Twine &Msg) {
PrintMessage(L, Msg.str(), "warning");
+ PrintMacroInstantiations();
}
bool AsmParser::Error(SMLoc L, const Twine &Msg) {
PrintMessage(L, Msg.str(), "error");
- return true;
-}
-
-bool AsmParser::TokError(const char *Msg) {
- PrintMessage(Lexer.getLoc(), Msg, "error");
+ PrintMacroInstantiations();
return true;
}
return false;
}
-
+
+void AsmParser::JumpToLoc(SMLoc Loc) {
+ CurBuffer = SrcMgr.FindBufferContainingLoc(Loc);
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer), Loc.getPointer());
+}
+
const AsmToken &AsmParser::Lex() {
const AsmToken *tok = &Lexer.Lex();
// include stack.
SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
if (ParentIncludeLoc != SMLoc()) {
- CurBuffer = SrcMgr.FindBufferContainingLoc(ParentIncludeLoc);
- Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer),
- ParentIncludeLoc.getPointer());
+ JumpToLoc(ParentIncludeLoc);
tok = &Lexer.Lex();
}
}
if (tok->is(AsmToken::Error))
- PrintMessage(Lexer.getErrLoc(), Lexer.getErr(), "error");
+ Error(Lexer.getErrLoc(), Lexer.getErr());
return *tok;
}
if (TheCondState.TheCond != StartingCondState.TheCond ||
TheCondState.Ignore != StartingCondState.Ignore)
return TokError("unmatched .ifs or .elses");
+
+ // Check to see there are no empty DwarfFile slots.
+ const std::vector<MCDwarfFile *> &MCDwarfFiles =
+ getContext().getMCDwarfFiles();
+ for (unsigned i = 1; i < MCDwarfFiles.size(); i++) {
+ if (!MCDwarfFiles[i]){
+ TokError("unassigned file number: " + Twine(i) + " for .file directives");
+ HadError = true;
+ }
+ }
// Finalize the output stream if there are no errors and if the client wants
// us to.
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);
+}
/// ParseParenExpr - Parse a paren expression and return it.
/// NOTE: This assumes the leading '(' has already been consumed.
return false;
}
-MCSymbol *AsmParser::CreateSymbol(StringRef Name) {
- // FIXME: Inline into callers.
- return Ctx.GetOrCreateSymbol(Name);
-}
-
/// ParsePrimaryExpr - Parse a primary expression and return it.
/// primaryexpr ::= (parenexpr
/// primaryexpr ::= symbol
case AsmToken::Identifier: {
// This is a symbol reference.
std::pair<StringRef, StringRef> Split = getTok().getIdentifier().split('@');
- MCSymbol *Sym = CreateSymbol(Split.first);
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Split.first);
+
+ // Mark the symbol as used in an expression.
+ Sym->setUsedInExpr(true);
// Lookup the symbol variant if used.
MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
// If this is an absolute variable reference, substitute it now to preserve
// semantics in the face of reassignment.
- if (Sym->getValue() && isa<MCConstantExpr>(Sym->getValue())) {
+ if (Sym->isVariable() && isa<MCConstantExpr>(Sym->getVariableValue())) {
if (Variant)
return Error(EndLoc, "unexpected modified on variable reference");
- Res = Sym->getValue();
+ Res = Sym->getVariableValue();
return false;
}
Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
return false;
}
- case AsmToken::Integer:
- Res = MCConstantExpr::Create(getTok().getIntVal(), getContext());
+ case AsmToken::Integer: {
+ SMLoc Loc = getTok().getLoc();
+ int64_t IntVal = getTok().getIntVal();
+ Res = MCConstantExpr::Create(IntVal, getContext());
EndLoc = Lexer.getLoc();
Lex(); // Eat token.
+ // Look for 'b' or 'f' following an Integer as a directional label
+ if (Lexer.getKind() == AsmToken::Identifier) {
+ StringRef IDVal = getTok().getString();
+ if (IDVal == "f" || IDVal == "b"){
+ MCSymbol *Sym = Ctx.GetDirectionalLocalSymbol(IntVal,
+ IDVal == "f" ? 1 : 0);
+ Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
+ getContext());
+ if(IDVal == "b" && Sym->isUndefined())
+ return Error(Loc, "invalid reference to undefined symbol");
+ EndLoc = Lexer.getLoc();
+ Lex(); // Eat identifier.
+ }
+ }
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.
/// ::= Label* Identifier OperandList* EndOfStatement
bool AsmParser::ParseStatement() {
if (Lexer.is(AsmToken::EndOfStatement)) {
+ Out.AddBlankLine();
Lex();
return false;
}
AsmToken ID = getTok();
SMLoc IDLoc = ID.getLoc();
StringRef IDVal;
- if (ParseIdentifier(IDVal)) {
+ int64_t LocalLabelVal = -1;
+ // GUESS 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 (ParseIdentifier(IDVal)) {
if (!TheCondState.Ignore)
return TokError("unexpected token at start of statement");
IDVal = "";
// 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 = CreateSymbol(IDVal);
- if (!Sym->isUndefined())
+ 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.
Out.EmitLabel(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 ParseStatement();
}
default: // Normal instruction or directive.
break;
}
-
+
+ // If macros are enabled, check to see if this is a macro instantiation.
+ if (MacrosEnabled)
+ if (const Macro *M = MacroMap.lookup(IDVal))
+ return HandleMacroEntry(IDVal, IDLoc, M);
+
// Otherwise, we have a normal instruction or directive.
if (IDVal[0] == '.') {
- // FIXME: This should be driven based on a hash lookup and callback.
- if (IDVal == ".section")
- return ParseDirectiveDarwinSection();
- if (IDVal == ".text")
- // FIXME: This changes behavior based on the -static flag to the
- // assembler.
- return ParseDirectiveSectionSwitch("__TEXT", "__text",
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
- if (IDVal == ".const")
- return ParseDirectiveSectionSwitch("__TEXT", "__const");
- if (IDVal == ".static_const")
- return ParseDirectiveSectionSwitch("__TEXT", "__static_const");
- if (IDVal == ".cstring")
- return ParseDirectiveSectionSwitch("__TEXT","__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".literal4")
- return ParseDirectiveSectionSwitch("__TEXT", "__literal4",
- MCSectionMachO::S_4BYTE_LITERALS,
- 4);
- if (IDVal == ".literal8")
- return ParseDirectiveSectionSwitch("__TEXT", "__literal8",
- MCSectionMachO::S_8BYTE_LITERALS,
- 8);
- if (IDVal == ".literal16")
- return ParseDirectiveSectionSwitch("__TEXT","__literal16",
- MCSectionMachO::S_16BYTE_LITERALS,
- 16);
- if (IDVal == ".constructor")
- return ParseDirectiveSectionSwitch("__TEXT","__constructor");
- if (IDVal == ".destructor")
- return ParseDirectiveSectionSwitch("__TEXT","__destructor");
- if (IDVal == ".fvmlib_init0")
- return ParseDirectiveSectionSwitch("__TEXT","__fvmlib_init0");
- if (IDVal == ".fvmlib_init1")
- return ParseDirectiveSectionSwitch("__TEXT","__fvmlib_init1");
-
- // FIXME: The assembler manual claims that this has the self modify code
- // flag, at least on x86-32, but that does not appear to be correct.
- if (IDVal == ".symbol_stub")
- return ParseDirectiveSectionSwitch("__TEXT","__symbol_stub",
- MCSectionMachO::S_SYMBOL_STUBS |
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- // FIXME: Different on PPC and ARM.
- 0, 16);
- // FIXME: PowerPC only?
- if (IDVal == ".picsymbol_stub")
- return ParseDirectiveSectionSwitch("__TEXT","__picsymbol_stub",
- MCSectionMachO::S_SYMBOL_STUBS |
- MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
- 0, 26);
- if (IDVal == ".data")
- return ParseDirectiveSectionSwitch("__DATA", "__data");
- if (IDVal == ".static_data")
- return ParseDirectiveSectionSwitch("__DATA", "__static_data");
-
- // FIXME: The section names of these two are misspelled in the assembler
- // manual.
- if (IDVal == ".non_lazy_symbol_pointer")
- return ParseDirectiveSectionSwitch("__DATA", "__nl_symbol_ptr",
- MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
- 4);
- if (IDVal == ".lazy_symbol_pointer")
- return ParseDirectiveSectionSwitch("__DATA", "__la_symbol_ptr",
- MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
- 4);
-
- if (IDVal == ".dyld")
- return ParseDirectiveSectionSwitch("__DATA", "__dyld");
- if (IDVal == ".mod_init_func")
- return ParseDirectiveSectionSwitch("__DATA", "__mod_init_func",
- MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
- 4);
- if (IDVal == ".mod_term_func")
- return ParseDirectiveSectionSwitch("__DATA", "__mod_term_func",
- MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
- 4);
- if (IDVal == ".const_data")
- return ParseDirectiveSectionSwitch("__DATA", "__const");
-
-
- if (IDVal == ".objc_class")
- return ParseDirectiveSectionSwitch("__OBJC", "__class",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_meta_class")
- return ParseDirectiveSectionSwitch("__OBJC", "__meta_class",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cat_cls_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__cat_cls_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cat_inst_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__cat_inst_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_protocol")
- return ParseDirectiveSectionSwitch("__OBJC", "__protocol",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_string_object")
- return ParseDirectiveSectionSwitch("__OBJC", "__string_object",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cls_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__cls_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_inst_meth")
- return ParseDirectiveSectionSwitch("__OBJC", "__inst_meth",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_cls_refs")
- return ParseDirectiveSectionSwitch("__OBJC", "__cls_refs",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
- MCSectionMachO::S_LITERAL_POINTERS,
- 4);
- if (IDVal == ".objc_message_refs")
- return ParseDirectiveSectionSwitch("__OBJC", "__message_refs",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
- MCSectionMachO::S_LITERAL_POINTERS,
- 4);
- if (IDVal == ".objc_symbols")
- return ParseDirectiveSectionSwitch("__OBJC", "__symbols",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_category")
- return ParseDirectiveSectionSwitch("__OBJC", "__category",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_class_vars")
- return ParseDirectiveSectionSwitch("__OBJC", "__class_vars",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_instance_vars")
- return ParseDirectiveSectionSwitch("__OBJC", "__instance_vars",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_module_info")
- return ParseDirectiveSectionSwitch("__OBJC", "__module_info",
- MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
- if (IDVal == ".objc_class_names")
- return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".objc_meth_var_types")
- return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".objc_meth_var_names")
- return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
- MCSectionMachO::S_CSTRING_LITERALS);
- if (IDVal == ".objc_selector_strs")
- return ParseDirectiveSectionSwitch("__OBJC", "__selector_strs",
- MCSectionMachO::S_CSTRING_LITERALS);
-
// Assembler features
if (IDVal == ".set")
return ParseDirectiveSet();
if (IDVal == ".quad")
return ParseDirectiveValue(8);
- // FIXME: Target hooks for IsPow2.
- if (IDVal == ".align")
- return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
- if (IDVal == ".align32")
- return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
+ if (IDVal == ".align") {
+ bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes();
+ return ParseDirectiveAlign(IsPow2, /*ExprSize=*/1);
+ }
+ if (IDVal == ".align32") {
+ bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes();
+ return ParseDirectiveAlign(IsPow2, /*ExprSize=*/4);
+ }
if (IDVal == ".balign")
return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
if (IDVal == ".balignw")
return ParseDirectiveSymbolAttribute(MCSA_Protected);
if (IDVal == ".reference")
return ParseDirectiveSymbolAttribute(MCSA_Reference);
+ if (IDVal == ".type")
+ return ParseDirectiveELFType();
if (IDVal == ".weak")
return ParseDirectiveSymbolAttribute(MCSA_Weak);
if (IDVal == ".weak_definition")
return ParseDirectiveSymbolAttribute(MCSA_WeakDefinition);
if (IDVal == ".weak_reference")
return ParseDirectiveSymbolAttribute(MCSA_WeakReference);
+ if (IDVal == ".weak_def_can_be_hidden")
+ return ParseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
if (IDVal == ".comm")
return ParseDirectiveComm(/*IsLocal=*/false);
if (IDVal == ".lcomm")
return ParseDirectiveComm(/*IsLocal=*/true);
- if (IDVal == ".zerofill")
- return ParseDirectiveDarwinZerofill();
- if (IDVal == ".desc")
- return ParseDirectiveDarwinSymbolDesc();
- if (IDVal == ".lsym")
- return ParseDirectiveDarwinLsym();
-
- if (IDVal == ".subsections_via_symbols")
- return ParseDirectiveDarwinSubsectionsViaSymbols();
+
if (IDVal == ".abort")
return ParseDirectiveAbort();
if (IDVal == ".include")
return ParseDirectiveInclude();
- if (IDVal == ".dump")
- return ParseDirectiveDarwinDumpOrLoad(IDLoc, /*IsDump=*/true);
- if (IDVal == ".load")
- return ParseDirectiveDarwinDumpOrLoad(IDLoc, /*IsLoad=*/false);
-
- // Look up the handler in the handler table,
- bool(AsmParser::*Handler)(StringRef, SMLoc) = DirectiveMap[IDVal];
- if (Handler)
- return (this->*Handler)(IDVal, IDLoc);
-
+
+ // Look up the handler in the handler table.
+ std::pair<MCAsmParserExtension*, DirectiveHandler> Handler =
+ DirectiveMap.lookup(IDVal);
+ if (Handler.first)
+ return (*Handler.second)(Handler.first, IDVal, IDLoc);
+
// Target hook for parsing target specific directives.
if (!getTargetParser().ParseDirective(ID))
return false;
return false;
}
+ // Canonicalize the opcode to lower case.
+ SmallString<128> Opcode;
+ for (unsigned i = 0, e = IDVal.size(); i != e; ++i)
+ Opcode.push_back(tolower(IDVal[i]));
+
SmallVector<MCParsedAsmOperand*, 8> ParsedOperands;
- bool HadError = getTargetParser().ParseInstruction(IDVal, IDLoc,
+ bool HadError = getTargetParser().ParseInstruction(Opcode.str(), IDLoc,
ParsedOperands);
if (!HadError && Lexer.isNot(AsmToken::EndOfStatement))
HadError = TokError("unexpected token in argument list");
return HadError;
}
-bool AsmParser::ParseAssignment(const StringRef &Name) {
+MacroInstantiation::MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL,
+ const std::vector<std::vector<AsmToken> > &A)
+ : TheMacro(M), InstantiationLoc(IL), ExitLoc(EL)
+{
+ // 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 Body = M->Body;
+ 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 (Body[Pos] != '$' || Pos + 1 == End)
+ continue;
+
+ char Next = Body[Pos + 1];
+ if (Next == '$' || Next == 'n' || isdigit(Next))
+ break;
+ }
+
+ // Add the prefix.
+ OS << Body.slice(0, Pos);
+
+ // Check if we reached the end.
+ if (Pos == End)
+ break;
+
+ 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 (std::vector<AsmToken>::const_iterator it = A[Index].begin(),
+ ie = A[Index].end(); it != ie; ++it)
+ OS << it->getString();
+ break;
+ }
+ }
+
+ // Update the scan point.
+ Body = Body.substr(Pos + 2);
+ }
+
+ // We include the .endmacro in the buffer as our queue to exit the macro
+ // instantiation.
+ OS << ".endmacro\n";
+
+ Instantiation = MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+}
+
+bool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc,
+ const Macro *M) {
+ // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
+ // this, although we should protect against infinite loops.
+ if (ActiveMacros.size() == 20)
+ return TokError("macros cannot be nested more than 20 levels deep");
+
+ // Parse the macro instantiation arguments.
+ std::vector<std::vector<AsmToken> > MacroArguments;
+ MacroArguments.push_back(std::vector<AsmToken>());
+ unsigned ParenLevel = 0;
+ for (;;) {
+ if (Lexer.is(AsmToken::Eof))
+ return TokError("unexpected token in macro instantiation");
+ if (Lexer.is(AsmToken::EndOfStatement))
+ break;
+
+ // If we aren't inside parentheses and this is a comma, start a new token
+ // list.
+ if (ParenLevel == 0 && Lexer.is(AsmToken::Comma)) {
+ MacroArguments.push_back(std::vector<AsmToken>());
+ } else if (Lexer.is(AsmToken::LParen)) {
+ ++ParenLevel;
+ } else if (Lexer.is(AsmToken::RParen)) {
+ if (ParenLevel)
+ --ParenLevel;
+ } else {
+ MacroArguments.back().push_back(getTok());
+ }
+ Lex();
+ }
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(M, NameLoc,
+ getTok().getLoc(),
+ MacroArguments);
+ ActiveMacros.push_back(MI);
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+ Lex();
+
+ return false;
+}
+
+void AsmParser::HandleMacroExit() {
+ // Jump to the EndOfStatement we should return to, and consume it.
+ JumpToLoc(ActiveMacros.back()->ExitLoc);
+ Lex();
+
+ // Pop the instantiation entry.
+ delete ActiveMacros.back();
+ ActiveMacros.pop_back();
+}
+
+bool AsmParser::ParseAssignment(StringRef Name) {
// FIXME: Use better location, we should use proper tokens.
SMLoc EqualLoc = Lexer.getLoc();
const MCExpr *Value;
- SMLoc StartLoc = Lexer.getLoc();
if (ParseExpression(Value))
return true;
//
// FIXME: Diagnostics. Note the location of the definition as a label.
// FIXME: Diagnose assignment to protected identifier (e.g., register name).
- if (!Sym->isUndefined() && !Sym->isAbsolute())
+ if (Sym->isUndefined() && !Sym->isUsedInExpr())
+ ; // Allow redefinitions of undefined symbols only used in directives.
+ else if (!Sym->isUndefined() && !Sym->isAbsolute())
return Error(EqualLoc, "redefinition of '" + Name + "'");
else if (!Sym->isVariable())
return Error(EqualLoc, "invalid assignment to '" + Name + "'");
- else if (!isa<MCConstantExpr>(Sym->getValue()))
+ else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
return Error(EqualLoc, "invalid reassignment of non-absolute variable '" +
Name + "'");
} else
- Sym = CreateSymbol(Name);
+ Sym = getContext().GetOrCreateSymbol(Name);
// FIXME: Handle '.'.
+ Sym->setUsedInExpr(true);
+
// Do the assignment.
Out.EmitAssignment(Sym, Value);
if (ParseIdentifier(Name))
return TokError("expected identifier after '.set' directive");
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.set'");
Lex();
return ParseAssignment(Name);
}
-/// ParseDirectiveSection:
-/// ::= .section identifier (',' identifier)*
-/// FIXME: This should actually parse out the segment, section, attributes and
-/// sizeof_stub fields.
-bool AsmParser::ParseDirectiveDarwinSection() {
- SMLoc Loc = Lexer.getLoc();
-
- StringRef SectionName;
- if (ParseIdentifier(SectionName))
- return Error(Loc, "expected identifier after '.section' directive");
-
- // Verify there is a following comma.
- if (!Lexer.is(AsmToken::Comma))
- return TokError("unexpected token in '.section' directive");
-
- std::string SectionSpec = SectionName;
- SectionSpec += ",";
-
- // Add all the tokens until the end of the line, ParseSectionSpecifier will
- // handle this.
- StringRef EOL = Lexer.LexUntilEndOfStatement();
- SectionSpec.append(EOL.begin(), EOL.end());
-
- Lex();
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.section' directive");
- Lex();
-
-
- StringRef Segment, Section;
- unsigned TAA, StubSize;
- std::string ErrorStr =
- MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
- TAA, StubSize);
-
- if (!ErrorStr.empty())
- return Error(Loc, ErrorStr.c_str());
-
- // FIXME: Arch specific.
- bool isText = Segment == "__TEXT"; // FIXME: Hack.
- Out.SwitchSection(Ctx.getMachOSection(Segment, Section, TAA, StubSize,
- isText ? SectionKind::getText()
- : SectionKind::getDataRel()));
- return false;
-}
-
-/// ParseDirectiveSectionSwitch -
-bool AsmParser::ParseDirectiveSectionSwitch(const char *Segment,
- const char *Section,
- unsigned TAA, unsigned Align,
- unsigned StubSize) {
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in section switching directive");
- Lex();
-
- // FIXME: Arch specific.
- bool isText = StringRef(Segment) == "__TEXT"; // FIXME: Hack.
- Out.SwitchSection(Ctx.getMachOSection(Segment, Section, TAA, StubSize,
- isText ? SectionKind::getText()
- : SectionKind::getDataRel()));
-
- // Set the implicit alignment, if any.
- //
- // FIXME: This isn't really what 'as' does; I think it just uses the implicit
- // alignment on the section (e.g., if one manually inserts bytes into the
- // section, then just issueing the section switch directive will not realign
- // the section. However, this is arguably more reasonable behavior, and there
- // is no good reason for someone to intentionally emit incorrectly sized
- // values into the implicitly aligned sections.
- if (Align)
- Out.EmitValueToAlignment(Align, 0, 1, 0);
-
- return false;
-}
-
bool AsmParser::ParseEscapedString(std::string &Data) {
- assert(Lexer.is(AsmToken::String) && "Unexpected current token!");
+ assert(getLexer().is(AsmToken::String) && "Unexpected current token!");
Data = "";
StringRef Str = getTok().getStringContents();
/// ParseDirectiveAscii:
/// ::= ( .ascii | .asciz ) [ "string" ( , "string" )* ]
bool AsmParser::ParseDirectiveAscii(bool ZeroTerminated) {
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
for (;;) {
- if (Lexer.isNot(AsmToken::String))
+ if (getLexer().isNot(AsmToken::String))
return TokError("expected string in '.ascii' or '.asciz' directive");
-
+
std::string Data;
if (ParseEscapedString(Data))
return true;
-
- Out.EmitBytes(Data, DEFAULT_ADDRSPACE);
+
+ getStreamer().EmitBytes(Data, DEFAULT_ADDRSPACE);
if (ZeroTerminated)
- Out.EmitBytes(StringRef("\0", 1), DEFAULT_ADDRSPACE);
-
+ getStreamer().EmitBytes(StringRef("\0", 1), DEFAULT_ADDRSPACE);
+
Lex();
-
- if (Lexer.is(AsmToken::EndOfStatement))
+
+ if (getLexer().is(AsmToken::EndOfStatement))
break;
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.ascii' or '.asciz' directive");
Lex();
}
/// ParseDirectiveValue
/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
bool AsmParser::ParseDirectiveValue(unsigned Size) {
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
for (;;) {
const MCExpr *Value;
- SMLoc ATTRIBUTE_UNUSED StartLoc = Lexer.getLoc();
+ SMLoc ATTRIBUTE_UNUSED StartLoc = getLexer().getLoc();
if (ParseExpression(Value))
return true;
- Out.EmitValue(Value, Size, DEFAULT_ADDRSPACE);
+ // Special case constant expressions to match code generator.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value))
+ getStreamer().EmitIntValue(MCE->getValue(), Size, DEFAULT_ADDRSPACE);
+ else
+ getStreamer().EmitValue(Value, Size, DEFAULT_ADDRSPACE);
- if (Lexer.is(AsmToken::EndOfStatement))
+ if (getLexer().is(AsmToken::EndOfStatement))
break;
// FIXME: Improve diagnostic.
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
}
return true;
int64_t FillExpr = 0;
- bool HasFillExpr = false;
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.space' directive");
Lex();
if (ParseAbsoluteExpression(FillExpr))
return true;
- HasFillExpr = true;
-
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.space' directive");
}
return TokError("invalid number of bytes in '.space' directive");
// FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
- Out.EmitFill(NumBytes, FillExpr, DEFAULT_ADDRSPACE);
+ getStreamer().EmitFill(NumBytes, FillExpr, DEFAULT_ADDRSPACE);
return false;
}
if (ParseAbsoluteExpression(NumValues))
return true;
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.fill' directive");
Lex();
if (ParseAbsoluteExpression(FillSize))
return true;
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.fill' directive");
Lex();
if (ParseAbsoluteExpression(FillExpr))
return true;
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.fill' directive");
Lex();
return TokError("invalid '.fill' size, expected 1, 2, 4, or 8");
for (uint64_t i = 0, e = NumValues; i != e; ++i)
- Out.EmitValue(MCConstantExpr::Create(FillExpr, getContext()), FillSize,
- DEFAULT_ADDRSPACE);
+ getStreamer().EmitIntValue(FillExpr, FillSize, DEFAULT_ADDRSPACE);
return false;
}
/// ::= .org expression [ , expression ]
bool AsmParser::ParseDirectiveOrg() {
const MCExpr *Offset;
- SMLoc StartLoc = Lexer.getLoc();
if (ParseExpression(Offset))
return true;
// Parse optional fill expression.
int64_t FillExpr = 0;
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in '.org' directive");
Lex();
if (ParseAbsoluteExpression(FillExpr))
return true;
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.org' directive");
}
// FIXME: Only limited forms of relocatable expressions are accepted here, it
// has to be relative to the current section.
- Out.EmitValueToOffset(Offset, FillExpr);
+ getStreamer().EmitValueToOffset(Offset, FillExpr);
return false;
}
/// ParseDirectiveAlign
/// ::= {.align, ...} expression [ , expression [ , expression ]]
bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
- SMLoc AlignmentLoc = Lexer.getLoc();
+ SMLoc AlignmentLoc = getLexer().getLoc();
int64_t Alignment;
if (ParseAbsoluteExpression(Alignment))
return true;
bool HasFillExpr = false;
int64_t FillExpr = 0;
int64_t MaxBytesToFill = 0;
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::Comma))
+ 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 (Lexer.isNot(AsmToken::Comma)) {
+ if (getLexer().isNot(AsmToken::Comma)) {
HasFillExpr = true;
if (ParseAbsoluteExpression(FillExpr))
return true;
}
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
- MaxBytesLoc = Lexer.getLoc();
+ MaxBytesLoc = getLexer().getLoc();
if (ParseAbsoluteExpression(MaxBytesToFill))
return true;
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
}
}
Lex();
- if (!HasFillExpr) {
- // FIXME: Sometimes fill with nop.
+ if (!HasFillExpr)
FillExpr = 0;
- }
// Compute alignment in bytes.
if (IsPow2) {
}
}
- // FIXME: hard code the parser to use EmitCodeAlignment for text when using
- // the TextAlignFillValue.
- if(Out.getCurrentSection()->getKind().isText() &&
- Lexer.getMAI().getTextAlignFillValue() == FillExpr)
- Out.EmitCodeAlignment(Alignment, MaxBytesToFill);
- else
+ // Check whether we should use optimal code alignment for this .align
+ // directive.
+ //
+ // FIXME: This should be using a target hook.
+ bool UseCodeAlign = false;
+ if (const MCSectionMachO *S = dyn_cast<MCSectionMachO>(
+ getStreamer().getCurrentSection()))
+ UseCodeAlign = S->hasAttribute(MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
+ 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.
- Out.EmitValueToAlignment(Alignment, FillExpr, ValueSize, MaxBytesToFill);
+ getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize,
+ MaxBytesToFill);
+ }
return false;
}
/// ParseDirectiveSymbolAttribute
/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
bool AsmParser::ParseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
for (;;) {
StringRef Name;
if (ParseIdentifier(Name))
return TokError("expected identifier in directive");
- MCSymbol *Sym = CreateSymbol(Name);
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
- Out.EmitSymbolAttribute(Sym, Attr);
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
- if (Lexer.is(AsmToken::EndOfStatement))
+ if (getLexer().is(AsmToken::EndOfStatement))
break;
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
}
return false;
}
-/// ParseDirectiveDarwinSymbolDesc
-/// ::= .desc identifier , expression
-bool AsmParser::ParseDirectiveDarwinSymbolDesc() {
+/// ParseDirectiveELFType
+/// ::= .type identifier , @attribute
+bool AsmParser::ParseDirectiveELFType() {
StringRef Name;
if (ParseIdentifier(Name))
return TokError("expected identifier in directive");
-
+
// Handle the identifier as the key symbol.
- MCSymbol *Sym = CreateSymbol(Name);
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
- if (Lexer.isNot(AsmToken::Comma))
- return TokError("unexpected token in '.desc' directive");
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.type' directive");
Lex();
- SMLoc DescLoc = Lexer.getLoc();
- int64_t DescValue;
- if (ParseAbsoluteExpression(DescValue))
- return true;
+ if (getLexer().isNot(AsmToken::At))
+ return TokError("expected '@' before type");
+ Lex();
+
+ StringRef Type;
+ SMLoc TypeLoc;
+
+ TypeLoc = getLexer().getLoc();
+ if (ParseIdentifier(Type))
+ return TokError("expected symbol type in directive");
+
+ MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Type)
+ .Case("function", MCSA_ELF_TypeFunction)
+ .Case("object", MCSA_ELF_TypeObject)
+ .Case("tls_object", MCSA_ELF_TypeTLS)
+ .Case("common", MCSA_ELF_TypeCommon)
+ .Case("notype", MCSA_ELF_TypeNoType)
+ .Default(MCSA_Invalid);
+
+ if (Attr == MCSA_Invalid)
+ return Error(TypeLoc, "unsupported attribute in '.type' directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.type' directive");
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.desc' directive");
-
Lex();
- // Set the n_desc field of this Symbol to this DescValue
- Out.EmitSymbolDesc(Sym, DescValue);
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
return false;
}
/// ParseDirectiveComm
/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
bool AsmParser::ParseDirectiveComm(bool IsLocal) {
- SMLoc IDLoc = Lexer.getLoc();
+ SMLoc IDLoc = getLexer().getLoc();
StringRef Name;
if (ParseIdentifier(Name))
return TokError("expected identifier in directive");
// Handle the identifier as the key symbol.
- MCSymbol *Sym = CreateSymbol(Name);
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
- if (Lexer.isNot(AsmToken::Comma))
+ if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
int64_t Size;
- SMLoc SizeLoc = Lexer.getLoc();
+ SMLoc SizeLoc = getLexer().getLoc();
if (ParseAbsoluteExpression(Size))
return true;
int64_t Pow2Alignment = 0;
SMLoc Pow2AlignmentLoc;
- if (Lexer.is(AsmToken::Comma)) {
+ if (getLexer().is(AsmToken::Comma)) {
Lex();
- Pow2AlignmentLoc = Lexer.getLoc();
+ Pow2AlignmentLoc = getLexer().getLoc();
if (ParseAbsoluteExpression(Pow2Alignment))
return true;
}
}
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.comm' or '.lcomm' directive");
Lex();
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 assember
+ // 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)
// '.lcomm' is equivalent to '.zerofill'.
// Create the Symbol as a common or local common with Size and Pow2Alignment
if (IsLocal) {
- Out.EmitZerofill(Ctx.getMachOSection("__DATA", "__bss",
- MCSectionMachO::S_ZEROFILL, 0,
- SectionKind::getBSS()),
- Sym, Size, 1 << Pow2Alignment);
+ getStreamer().EmitZerofill(Ctx.getMachOSection(
+ "__DATA", "__bss", MCSectionMachO::S_ZEROFILL,
+ 0, SectionKind::getBSS()),
+ Sym, Size, 1 << Pow2Alignment);
return false;
}
- Out.EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
- return false;
-}
-
-/// ParseDirectiveDarwinZerofill
-/// ::= .zerofill segname , sectname [, identifier , size_expression [
-/// , align_expression ]]
-bool AsmParser::ParseDirectiveDarwinZerofill() {
- // FIXME: Handle quoted names here.
-
- if (Lexer.isNot(AsmToken::Identifier))
- return TokError("expected segment name after '.zerofill' directive");
- StringRef Segment = getTok().getString();
- Lex();
-
- if (Lexer.isNot(AsmToken::Comma))
- return TokError("unexpected token in directive");
- Lex();
-
- if (Lexer.isNot(AsmToken::Identifier))
- return TokError("expected section name after comma in '.zerofill' "
- "directive");
- StringRef Section = getTok().getString();
- Lex();
-
- // If this is the end of the line all that was wanted was to create the
- // the section but with no symbol.
- if (Lexer.is(AsmToken::EndOfStatement)) {
- // Create the zerofill section but no symbol
- Out.EmitZerofill(Ctx.getMachOSection(Segment, Section,
- MCSectionMachO::S_ZEROFILL, 0,
- SectionKind::getBSS()));
- return false;
- }
-
- if (Lexer.isNot(AsmToken::Comma))
- return TokError("unexpected token in directive");
- Lex();
-
- if (Lexer.isNot(AsmToken::Identifier))
- return TokError("expected identifier in directive");
-
- // handle the identifier as the key symbol.
- SMLoc IDLoc = Lexer.getLoc();
- MCSymbol *Sym = CreateSymbol(getTok().getString());
- Lex();
-
- if (Lexer.isNot(AsmToken::Comma))
- return TokError("unexpected token in directive");
- Lex();
-
- int64_t Size;
- SMLoc SizeLoc = Lexer.getLoc();
- if (ParseAbsoluteExpression(Size))
- return true;
-
- int64_t Pow2Alignment = 0;
- SMLoc Pow2AlignmentLoc;
- if (Lexer.is(AsmToken::Comma)) {
- Lex();
- Pow2AlignmentLoc = Lexer.getLoc();
- if (ParseAbsoluteExpression(Pow2Alignment))
- return true;
- }
-
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.zerofill' directive");
-
- Lex();
-
- if (Size < 0)
- return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
- "than zero");
-
- // NOTE: The alignment in the directive is a power of 2 value, the assember
- // may internally end up wanting an alignment in bytes.
- // FIXME: Diagnose overflow.
- if (Pow2Alignment < 0)
- return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
- "can't be less than zero");
-
- if (!Sym->isUndefined())
- return Error(IDLoc, "invalid symbol redefinition");
-
- // Create the zerofill Symbol with Size and Pow2Alignment
- //
- // FIXME: Arch specific.
- Out.EmitZerofill(Ctx.getMachOSection(Segment, Section,
- MCSectionMachO::S_ZEROFILL, 0,
- SectionKind::getBSS()),
- Sym, Size, 1 << Pow2Alignment);
-
- return false;
-}
-
-/// ParseDirectiveDarwinSubsectionsViaSymbols
-/// ::= .subsections_via_symbols
-bool AsmParser::ParseDirectiveDarwinSubsectionsViaSymbols() {
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.subsections_via_symbols' directive");
-
- Lex();
-
- Out.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
-
+ getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
return false;
}
/// ParseDirectiveAbort
-/// ::= .abort [ "abort_string" ]
+/// ::= .abort [... message ...]
bool AsmParser::ParseDirectiveAbort() {
// FIXME: Use loc from directive.
- SMLoc Loc = Lexer.getLoc();
+ SMLoc Loc = getLexer().getLoc();
- StringRef Str = "";
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::String))
- return TokError("expected string in '.abort' directive");
-
- Str = getTok().getString();
-
- Lex();
- }
-
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ StringRef Str = ParseStringToEndOfStatement();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.abort' directive");
-
+
Lex();
- // FIXME: Handle here.
if (Str.empty())
Error(Loc, ".abort detected. Assembly stopping.");
else
Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
+ // FIXME: Actually abort assembly here.
return false;
}
-/// ParseDirectiveLsym
-/// ::= .lsym identifier , expression
-bool AsmParser::ParseDirectiveDarwinLsym() {
- StringRef Name;
- if (ParseIdentifier(Name))
- return TokError("expected identifier in directive");
-
- // Handle the identifier as the key symbol.
- MCSymbol *Sym = CreateSymbol(Name);
-
- if (Lexer.isNot(AsmToken::Comma))
- return TokError("unexpected token in '.lsym' directive");
- Lex();
-
- const MCExpr *Value;
- SMLoc StartLoc = Lexer.getLoc();
- if (ParseExpression(Value))
- return true;
-
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.lsym' directive");
-
- Lex();
-
- // We don't currently support this directive.
- //
- // FIXME: Diagnostic location!
- (void) Sym;
- return TokError("directive '.lsym' is unsupported");
-}
-
/// ParseDirectiveInclude
/// ::= .include "filename"
bool AsmParser::ParseDirectiveInclude() {
- if (Lexer.isNot(AsmToken::String))
+ if (getLexer().isNot(AsmToken::String))
return TokError("expected string in '.include' directive");
std::string Filename = getTok().getString();
- SMLoc IncludeLoc = Lexer.getLoc();
+ SMLoc IncludeLoc = getLexer().getLoc();
Lex();
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.include' directive");
// Strip the quotes.
// Attempt to switch the lexer to the included file before consuming the end
// of statement to avoid losing it when we switch.
if (EnterIncludeFile(Filename)) {
- PrintMessage(IncludeLoc,
- "Could not find include file '" + Filename + "'",
- "error");
+ Error(IncludeLoc, "Could not find include file '" + Filename + "'");
return true;
}
return false;
}
-/// ParseDirectiveDarwinDumpOrLoad
-/// ::= ( .dump | .load ) "filename"
-bool AsmParser::ParseDirectiveDarwinDumpOrLoad(SMLoc IDLoc, bool IsDump) {
- if (Lexer.isNot(AsmToken::String))
- return TokError("expected string in '.dump' or '.load' directive");
-
- Lex();
-
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.dump' or '.load' directive");
-
- Lex();
-
- // FIXME: If/when .dump and .load are implemented they will be done in the
- // the assembly parser and not have any need for an MCStreamer API.
- if (IsDump)
- Warning(IDLoc, "ignoring directive .dump for now");
- else
- Warning(IDLoc, "ignoring directive .load for now");
-
- return false;
-}
-
/// ParseDirectiveIf
/// ::= .if expression
bool AsmParser::ParseDirectiveIf(SMLoc DirectiveLoc) {
if (ParseAbsoluteExpression(ExprValue))
return true;
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.if' directive");
Lex();
if (ParseAbsoluteExpression(ExprValue))
return true;
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.elseif' directive");
Lex();
/// ParseDirectiveElse
/// ::= .else
bool AsmParser::ParseDirectiveElse(SMLoc DirectiveLoc) {
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.else' directive");
Lex();
/// ParseDirectiveEndIf
/// ::= .endif
bool AsmParser::ParseDirectiveEndIf(SMLoc DirectiveLoc) {
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.endif' directive");
Lex();
/// ParseDirectiveFile
/// ::= .file [number] string
-bool AsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
+bool GenericAsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
// FIXME: I'm not sure what this is.
int64_t FileNumber = -1;
- if (Lexer.is(AsmToken::Integer)) {
+ SMLoc FileNumberLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Integer)) {
FileNumber = getTok().getIntVal();
Lex();
-
+
if (FileNumber < 1)
return TokError("file number less than one");
}
- if (Lexer.isNot(AsmToken::String))
+ if (getLexer().isNot(AsmToken::String))
return TokError("unexpected token in '.file' directive");
-
+
StringRef Filename = getTok().getString();
Filename = Filename.substr(1, Filename.size()-2);
Lex();
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.file' directive");
if (FileNumber == -1)
- Out.EmitFileDirective(Filename);
- else
- Out.EmitDwarfFileDirective(FileNumber, Filename);
-
+ getStreamer().EmitFileDirective(Filename);
+ else {
+ if (getContext().GetDwarfFile(Filename, FileNumber) == 0)
+ Error(FileNumberLoc, "file number already allocated");
+ getStreamer().EmitDwarfFileDirective(FileNumber, Filename);
+ }
+
return false;
}
/// ParseDirectiveLine
/// ::= .line [number]
-bool AsmParser::ParseDirectiveLine(StringRef, SMLoc DirectiveLoc) {
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::Integer))
+bool GenericAsmParser::ParseDirectiveLine(StringRef, SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Integer))
return TokError("unexpected token in '.line' directive");
int64_t LineNumber = getTok().getIntVal();
// FIXME: Do something with the .line.
}
- if (Lexer.isNot(AsmToken::EndOfStatement))
- return TokError("unexpected token in '.file' directive");
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.line' directive");
return false;
}
/// ParseDirectiveLoc
/// ::= .loc number [number [number]]
-bool AsmParser::ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc) {
- if (Lexer.isNot(AsmToken::Integer))
+bool GenericAsmParser::ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::Integer))
return TokError("unexpected token in '.loc' directive");
// FIXME: What are these fields?
// FIXME: Validate file.
Lex();
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::Integer))
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Integer))
return TokError("unexpected token in '.loc' directive");
int64_t Param2 = getTok().getIntVal();
(void) Param2;
Lex();
- if (Lexer.isNot(AsmToken::EndOfStatement)) {
- if (Lexer.isNot(AsmToken::Integer))
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Integer))
return TokError("unexpected token in '.loc' directive");
int64_t Param3 = getTok().getIntVal();
}
}
- if (Lexer.isNot(AsmToken::EndOfStatement))
+ if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.file' directive");
return false;
}
+/// ParseDirectiveMacrosOnOff
+/// ::= .macros_on
+/// ::= .macros_off
+bool GenericAsmParser::ParseDirectiveMacrosOnOff(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ getParser().MacrosEnabled = Directive == ".macros_on";
+
+ return false;
+}
+
+/// ParseDirectiveMacro
+/// ::= .macro name
+bool GenericAsmParser::ParseDirectiveMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.macro' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ AsmToken EndToken, StartToken = getTok();
+
+ // Lex the macro definition.
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof))
+ return Error(DirectiveLoc, "no matching '.endmacro' in definition");
+
+ // Otherwise, check whether we have reach the .endmacro.
+ if (getLexer().is(AsmToken::Identifier) &&
+ (getTok().getIdentifier() == ".endm" ||
+ getTok().getIdentifier() == ".endmacro")) {
+ EndToken = getTok();
+ Lex();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + EndToken.getIdentifier() +
+ "' directive");
+ break;
+ }
+
+ // Otherwise, scan til the end of the statement.
+ getParser().EatToEndOfStatement();
+ }
+
+ if (getParser().MacroMap.lookup(Name)) {
+ return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+ getParser().MacroMap[Name] = new Macro(Name, Body);
+ return false;
+}
+
+/// ParseDirectiveEndMacro
+/// ::= .endm
+/// ::= .endmacro
+bool GenericAsmParser::ParseDirectiveEndMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + Directive + "' directive");
+
+ // If we are inside a macro instantiation, terminate the current
+ // instantiation.
+ if (!getParser().ActiveMacros.empty()) {
+ getParser().HandleMacroExit();
+ return false;
+ }
+
+ // Otherwise, this .endmacro is a stray entry in the file; well formed
+ // .endmacro directives are handled during the macro definition parsing.
+ return TokError("unexpected '" + Directive + "' in file, "
+ "no current macro definition");
+}
+
+/// \brief Create an MCAsmParser instance.
+MCAsmParser *llvm::createMCAsmParser(const Target &T, SourceMgr &SM,
+ MCContext &C, MCStreamer &Out,
+ const MCAsmInfo &MAI) {
+ return new AsmParser(T, SM, C, Out, MAI);
+}
projects / oota-llvm.git / blobdiff