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-rw-r--r--tools/llvm-mc/AsmParser.cpp1477
1 files changed, 1130 insertions, 347 deletions
diff --git a/tools/llvm-mc/AsmParser.cpp b/tools/llvm-mc/AsmParser.cpp
index f5bf589..aae27f5d 100644
--- a/tools/llvm-mc/AsmParser.cpp
+++ b/tools/llvm-mc/AsmParser.cpp
@@ -13,21 +13,79 @@
#include "AsmParser.h"
-#include "AsmExpr.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetAsmParser.h"
using namespace llvm;
-void AsmParser::Warning(SMLoc L, const char *Msg) {
- Lexer.PrintMessage(L, Msg, "warning");
+// Mach-O section uniquing.
+//
+// FIXME: Figure out where this should live, it should be shared by
+// TargetLoweringObjectFile.
+typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
+
+AsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx, MCStreamer &_Out,
+ const MCAsmInfo &_MAI)
+ : Lexer(_SM, _MAI), Ctx(_Ctx), Out(_Out), TargetParser(0),
+ SectionUniquingMap(0) {
+ // Debugging directives.
+ AddDirectiveHandler(".file", &AsmParser::ParseDirectiveFile);
+ AddDirectiveHandler(".line", &AsmParser::ParseDirectiveLine);
+ AddDirectiveHandler(".loc", &AsmParser::ParseDirectiveLoc);
+}
+
+
+
+AsmParser::~AsmParser() {
+ // If we have the MachO uniquing map, free it.
+ delete (MachOUniqueMapTy*)SectionUniquingMap;
}
-bool AsmParser::Error(SMLoc L, const char *Msg) {
- Lexer.PrintMessage(L, Msg, "error");
+const MCSection *AsmParser::getMachOSection(const StringRef &Segment,
+ const StringRef &Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2,
+ SectionKind Kind) const {
+ // We unique sections by their segment/section pair. The returned section
+ // may not have the same flags as the requested section, if so this should be
+ // diagnosed by the client as an error.
+
+ // Create the map if it doesn't already exist.
+ if (SectionUniquingMap == 0)
+ SectionUniquingMap = new MachOUniqueMapTy();
+ MachOUniqueMapTy &Map = *(MachOUniqueMapTy*)SectionUniquingMap;
+
+ // Form the name to look up.
+ SmallString<64> Name;
+ Name += Segment;
+ Name.push_back(',');
+ Name += Section;
+
+ // Do the lookup, if we have a hit, return it.
+ const MCSectionMachO *&Entry = Map[Name.str()];
+
+ // FIXME: This should validate the type and attributes.
+ if (Entry) return Entry;
+
+ // Otherwise, return a new section.
+ return Entry = MCSectionMachO::Create(Segment, Section, TypeAndAttributes,
+ Reserved2, Kind, Ctx);
+}
+
+void AsmParser::Warning(SMLoc L, const Twine &Msg) {
+ Lexer.PrintMessage(L, Msg.str(), "warning");
+}
+
+bool AsmParser::Error(SMLoc L, const Twine &Msg) {
+ Lexer.PrintMessage(L, Msg.str(), "error");
return true;
}
@@ -37,31 +95,87 @@ bool AsmParser::TokError(const char *Msg) {
}
bool AsmParser::Run() {
+ // Create the initial section.
+ //
+ // FIXME: Support -n.
+ // FIXME: Target hook & command line option for initial section.
+ Out.SwitchSection(getMachOSection("__TEXT", "__text",
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 0, SectionKind()));
+
+
// Prime the lexer.
Lexer.Lex();
bool HadError = false;
+ AsmCond StartingCondState = TheCondState;
+
// While we have input, parse each statement.
- while (Lexer.isNot(asmtok::Eof)) {
+ while (Lexer.isNot(AsmToken::Eof)) {
+ // Handle conditional assembly here before calling ParseStatement()
+ if (Lexer.getKind() == AsmToken::Identifier) {
+ // If we have an identifier, handle it as the key symbol.
+ AsmToken ID = Lexer.getTok();
+ SMLoc IDLoc = ID.getLoc();
+ StringRef IDVal = ID.getString();
+
+ if (IDVal == ".if" ||
+ IDVal == ".elseif" ||
+ IDVal == ".else" ||
+ IDVal == ".endif") {
+ if (!ParseConditionalAssemblyDirectives(IDVal, IDLoc))
+ continue;
+ HadError = true;
+ EatToEndOfStatement();
+ continue;
+ }
+ }
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ continue;
+ }
+
if (!ParseStatement()) continue;
- // If we had an error, remember it and recover by skipping to the next line.
+ // We had an error, remember it and recover by skipping to the next line.
HadError = true;
EatToEndOfStatement();
}
+
+ if (TheCondState.TheCond != StartingCondState.TheCond ||
+ TheCondState.Ignore != StartingCondState.Ignore)
+ return TokError("unmatched .ifs or .elses");
+ if (!HadError)
+ Out.Finish();
+
return HadError;
}
+/// ParseConditionalAssemblyDirectives - parse the conditional assembly
+/// directives
+bool AsmParser::ParseConditionalAssemblyDirectives(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (Directive == ".if")
+ return ParseDirectiveIf(DirectiveLoc);
+ if (Directive == ".elseif")
+ return ParseDirectiveElseIf(DirectiveLoc);
+ if (Directive == ".else")
+ return ParseDirectiveElse(DirectiveLoc);
+ if (Directive == ".endif")
+ return ParseDirectiveEndIf(DirectiveLoc);
+ return true;
+}
+
/// EatToEndOfStatement - Throw away the rest of the line for testing purposes.
void AsmParser::EatToEndOfStatement() {
- while (Lexer.isNot(asmtok::EndOfStatement) &&
- Lexer.isNot(asmtok::Eof))
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Eof))
Lexer.Lex();
// Eat EOL.
- if (Lexer.is(asmtok::EndOfStatement))
+ if (Lexer.is(AsmToken::EndOfStatement))
Lexer.Lex();
}
@@ -71,66 +185,71 @@ void AsmParser::EatToEndOfStatement() {
///
/// parenexpr ::= expr)
///
-bool AsmParser::ParseParenExpr(AsmExpr *&Res) {
+bool AsmParser::ParseParenExpr(const MCExpr *&Res) {
if (ParseExpression(Res)) return true;
- if (Lexer.isNot(asmtok::RParen))
+ if (Lexer.isNot(AsmToken::RParen))
return TokError("expected ')' in parentheses expression");
Lexer.Lex();
return false;
}
+MCSymbol *AsmParser::CreateSymbol(StringRef Name) {
+ if (MCSymbol *S = Ctx.LookupSymbol(Name))
+ return S;
+
+ // If the label starts with L it is an assembler temporary label.
+ if (Name.startswith("L"))
+ return Ctx.CreateTemporarySymbol(Name);
+
+ return Ctx.CreateSymbol(Name);
+}
+
/// ParsePrimaryExpr - Parse a primary expression and return it.
/// primaryexpr ::= (parenexpr
/// primaryexpr ::= symbol
/// primaryexpr ::= number
/// primaryexpr ::= ~,+,- primaryexpr
-bool AsmParser::ParsePrimaryExpr(AsmExpr *&Res) {
+bool AsmParser::ParsePrimaryExpr(const MCExpr *&Res) {
switch (Lexer.getKind()) {
default:
return TokError("unknown token in expression");
- case asmtok::Exclaim:
+ case AsmToken::Exclaim:
Lexer.Lex(); // Eat the operator.
if (ParsePrimaryExpr(Res))
return true;
- Res = new AsmUnaryExpr(AsmUnaryExpr::LNot, Res);
+ Res = MCUnaryExpr::CreateLNot(Res, getContext());
return false;
- case asmtok::Identifier: {
+ case AsmToken::String:
+ case AsmToken::Identifier:
// This is a label, this should be parsed as part of an expression, to
// handle things like LFOO+4.
- MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
-
- // If this is use of an undefined symbol then mark it external.
- if (!Sym->getSection() && !Ctx.GetSymbolValue(Sym))
- Sym->setExternal(true);
-
- Res = new AsmSymbolRefExpr(Sym);
+ Res = MCSymbolRefExpr::Create(Lexer.getTok().getIdentifier(), getContext());
Lexer.Lex(); // Eat identifier.
return false;
- }
- case asmtok::IntVal:
- Res = new AsmConstantExpr(Lexer.getCurIntVal());
- Lexer.Lex(); // Eat identifier.
+ case AsmToken::Integer:
+ Res = MCConstantExpr::Create(Lexer.getTok().getIntVal(), getContext());
+ Lexer.Lex(); // Eat token.
return false;
- case asmtok::LParen:
+ case AsmToken::LParen:
Lexer.Lex(); // Eat the '('.
return ParseParenExpr(Res);
- case asmtok::Minus:
+ case AsmToken::Minus:
Lexer.Lex(); // Eat the operator.
if (ParsePrimaryExpr(Res))
return true;
- Res = new AsmUnaryExpr(AsmUnaryExpr::Minus, Res);
+ Res = MCUnaryExpr::CreateMinus(Res, getContext());
return false;
- case asmtok::Plus:
+ case AsmToken::Plus:
Lexer.Lex(); // Eat the operator.
if (ParsePrimaryExpr(Res))
return true;
- Res = new AsmUnaryExpr(AsmUnaryExpr::Plus, Res);
+ Res = MCUnaryExpr::CreatePlus(Res, getContext());
return false;
- case asmtok::Tilde:
+ case AsmToken::Tilde:
Lexer.Lex(); // Eat the operator.
if (ParsePrimaryExpr(Res))
return true;
- Res = new AsmUnaryExpr(AsmUnaryExpr::Not, Res);
+ Res = MCUnaryExpr::CreateNot(Res, getContext());
return false;
}
}
@@ -142,119 +261,101 @@ bool AsmParser::ParsePrimaryExpr(AsmExpr *&Res) {
/// expr ::= expr *,/,%,<<,>> expr -> highest.
/// expr ::= primaryexpr
///
-bool AsmParser::ParseExpression(AsmExpr *&Res) {
+bool AsmParser::ParseExpression(const MCExpr *&Res) {
Res = 0;
return ParsePrimaryExpr(Res) ||
ParseBinOpRHS(1, Res);
}
-bool AsmParser::ParseAbsoluteExpression(int64_t &Res) {
- AsmExpr *Expr;
-
- SMLoc StartLoc = Lexer.getLoc();
- if (ParseExpression(Expr))
+bool AsmParser::ParseParenExpression(const MCExpr *&Res) {
+ if (ParseParenExpr(Res))
return true;
- if (!Expr->EvaluateAsAbsolute(Ctx, Res))
- return Error(StartLoc, "expected absolute expression");
-
return false;
}
-bool AsmParser::ParseRelocatableExpression(MCValue &Res) {
- AsmExpr *Expr;
+bool AsmParser::ParseAbsoluteExpression(int64_t &Res) {
+ const MCExpr *Expr;
SMLoc StartLoc = Lexer.getLoc();
if (ParseExpression(Expr))
return true;
- if (!Expr->EvaluateAsRelocatable(Ctx, Res))
- return Error(StartLoc, "expected relocatable expression");
-
- return false;
-}
-
-bool AsmParser::ParseParenRelocatableExpression(MCValue &Res) {
- AsmExpr *Expr;
-
- SMLoc StartLoc = Lexer.getLoc();
- if (ParseParenExpr(Expr))
- return true;
-
- if (!Expr->EvaluateAsRelocatable(Ctx, Res))
- return Error(StartLoc, "expected relocatable expression");
+ if (!Expr->EvaluateAsAbsolute(Ctx, Res))
+ return Error(StartLoc, "expected absolute expression");
return false;
}
-static unsigned getBinOpPrecedence(asmtok::TokKind K,
- AsmBinaryExpr::Opcode &Kind) {
+static unsigned getBinOpPrecedence(AsmToken::TokenKind K,
+ MCBinaryExpr::Opcode &Kind) {
switch (K) {
- default: return 0; // not a binop.
+ default:
+ return 0; // not a binop.
// Lowest Precedence: &&, ||
- case asmtok::AmpAmp:
- Kind = AsmBinaryExpr::LAnd;
+ case AsmToken::AmpAmp:
+ Kind = MCBinaryExpr::LAnd;
return 1;
- case asmtok::PipePipe:
- Kind = AsmBinaryExpr::LOr;
+ case AsmToken::PipePipe:
+ Kind = MCBinaryExpr::LOr;
return 1;
// Low Precedence: +, -, ==, !=, <>, <, <=, >, >=
- case asmtok::Plus:
- Kind = AsmBinaryExpr::Add;
+ case AsmToken::Plus:
+ Kind = MCBinaryExpr::Add;
return 2;
- case asmtok::Minus:
- Kind = AsmBinaryExpr::Sub;
+ case AsmToken::Minus:
+ Kind = MCBinaryExpr::Sub;
return 2;
- case asmtok::EqualEqual:
- Kind = AsmBinaryExpr::EQ;
+ case AsmToken::EqualEqual:
+ Kind = MCBinaryExpr::EQ;
return 2;
- case asmtok::ExclaimEqual:
- case asmtok::LessGreater:
- Kind = AsmBinaryExpr::NE;
+ case AsmToken::ExclaimEqual:
+ case AsmToken::LessGreater:
+ Kind = MCBinaryExpr::NE;
return 2;
- case asmtok::Less:
- Kind = AsmBinaryExpr::LT;
+ case AsmToken::Less:
+ Kind = MCBinaryExpr::LT;
return 2;
- case asmtok::LessEqual:
- Kind = AsmBinaryExpr::LTE;
+ case AsmToken::LessEqual:
+ Kind = MCBinaryExpr::LTE;
return 2;
- case asmtok::Greater:
- Kind = AsmBinaryExpr::GT;
+ case AsmToken::Greater:
+ Kind = MCBinaryExpr::GT;
return 2;
- case asmtok::GreaterEqual:
- Kind = AsmBinaryExpr::GTE;
+ case AsmToken::GreaterEqual:
+ Kind = MCBinaryExpr::GTE;
return 2;
// Intermediate Precedence: |, &, ^
//
// FIXME: gas seems to support '!' as an infix operator?
- case asmtok::Pipe:
- Kind = AsmBinaryExpr::Or;
+ case AsmToken::Pipe:
+ Kind = MCBinaryExpr::Or;
return 3;
- case asmtok::Caret:
- Kind = AsmBinaryExpr::Xor;
+ case AsmToken::Caret:
+ Kind = MCBinaryExpr::Xor;
return 3;
- case asmtok::Amp:
- Kind = AsmBinaryExpr::And;
+ case AsmToken::Amp:
+ Kind = MCBinaryExpr::And;
return 3;
// Highest Precedence: *, /, %, <<, >>
- case asmtok::Star:
- Kind = AsmBinaryExpr::Mul;
+ case AsmToken::Star:
+ Kind = MCBinaryExpr::Mul;
return 4;
- case asmtok::Slash:
- Kind = AsmBinaryExpr::Div;
+ case AsmToken::Slash:
+ Kind = MCBinaryExpr::Div;
return 4;
- case asmtok::Percent:
- Kind = AsmBinaryExpr::Mod;
+ case AsmToken::Percent:
+ Kind = MCBinaryExpr::Mod;
return 4;
- case asmtok::LessLess:
- Kind = AsmBinaryExpr::Shl;
+ case AsmToken::LessLess:
+ Kind = MCBinaryExpr::Shl;
return 4;
- case asmtok::GreaterGreater:
- Kind = AsmBinaryExpr::Shr;
+ case AsmToken::GreaterGreater:
+ Kind = MCBinaryExpr::Shr;
return 4;
}
}
@@ -262,9 +363,9 @@ static unsigned getBinOpPrecedence(asmtok::TokKind K,
/// ParseBinOpRHS - Parse all binary operators with precedence >= 'Precedence'.
/// Res contains the LHS of the expression on input.
-bool AsmParser::ParseBinOpRHS(unsigned Precedence, AsmExpr *&Res) {
+bool AsmParser::ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res) {
while (1) {
- AsmBinaryExpr::Opcode Kind = AsmBinaryExpr::Add;
+ 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
@@ -275,19 +376,19 @@ bool AsmParser::ParseBinOpRHS(unsigned Precedence, AsmExpr *&Res) {
Lexer.Lex();
// Eat the next primary expression.
- AsmExpr *RHS;
+ const MCExpr *RHS;
if (ParsePrimaryExpr(RHS)) return true;
// If BinOp binds less tightly with RHS than the operator after RHS, let
// the pending operator take RHS as its LHS.
- AsmBinaryExpr::Opcode Dummy;
+ MCBinaryExpr::Opcode Dummy;
unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
if (TokPrec < NextTokPrec) {
if (ParseBinOpRHS(Precedence+1, RHS)) return true;
}
// Merge LHS and RHS according to operator.
- Res = new AsmBinaryExpr(Kind, Res, RHS);
+ Res = MCBinaryExpr::Create(Kind, Res, RHS, getContext());
}
}
@@ -299,24 +400,23 @@ bool AsmParser::ParseBinOpRHS(unsigned Precedence, AsmExpr *&Res) {
/// ::= Label* Directive ...Operands... EndOfStatement
/// ::= Label* Identifier OperandList* EndOfStatement
bool AsmParser::ParseStatement() {
- switch (Lexer.getKind()) {
- default:
- return TokError("unexpected token at start of statement");
- case asmtok::EndOfStatement:
+ if (Lexer.is(AsmToken::EndOfStatement)) {
Lexer.Lex();
return false;
- case asmtok::Identifier:
- break;
- // TODO: Recurse on local labels etc.
}
-
- // If we have an identifier, handle it as the key symbol.
- SMLoc IDLoc = Lexer.getLoc();
- const char *IDVal = Lexer.getCurStrVal();
-
- // Consume the identifier, see what is after it.
- switch (Lexer.Lex()) {
- case asmtok::Colon: {
+
+ // Statements always start with an identifier.
+ AsmToken ID = Lexer.getTok();
+ SMLoc IDLoc = ID.getLoc();
+ StringRef IDVal;
+ if (ParseIdentifier(IDVal))
+ return TokError("unexpected token at start of statement");
+
+ // FIXME: Recurse on local labels?
+
+ // See what kind of statement we have.
+ switch (Lexer.getKind()) {
+ case AsmToken::Colon: {
// identifier ':' -> Label.
Lexer.Lex();
@@ -325,25 +425,21 @@ bool AsmParser::ParseStatement() {
// 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 = Ctx.GetOrCreateSymbol(IDVal);
- if (Sym->getSection())
+ MCSymbol *Sym = CreateSymbol(IDVal);
+ if (!Sym->isUndefined())
return Error(IDLoc, "invalid symbol redefinition");
- if (Ctx.GetSymbolValue(Sym))
- return Error(IDLoc, "symbol already used as assembler variable");
- // Since we saw a label, create a symbol and emit it.
- // FIXME: If the label starts with L it is an assembler temporary label.
- // Why does the client of this api need to know this?
+ // Emit the label.
Out.EmitLabel(Sym);
return ParseStatement();
}
- case asmtok::Equal:
+ case AsmToken::Equal:
// identifier '=' ... -> assignment statement
Lexer.Lex();
- return ParseAssignment(IDVal, false);
+ return ParseAssignment(IDVal);
default: // Normal instruction or directive.
break;
@@ -352,184 +448,261 @@ bool AsmParser::ParseStatement() {
// Otherwise, we have a normal instruction or directive.
if (IDVal[0] == '.') {
// FIXME: This should be driven based on a hash lookup and callback.
- if (!strcmp(IDVal, ".section"))
+ if (IDVal == ".section")
return ParseDirectiveDarwinSection();
- if (!strcmp(IDVal, ".text"))
+ if (IDVal == ".text")
// FIXME: This changes behavior based on the -static flag to the
// assembler.
- return ParseDirectiveSectionSwitch("__TEXT,__text",
- "regular,pure_instructions");
- if (!strcmp(IDVal, ".const"))
- return ParseDirectiveSectionSwitch("__TEXT,__const");
- if (!strcmp(IDVal, ".static_const"))
- return ParseDirectiveSectionSwitch("__TEXT,__static_const");
- if (!strcmp(IDVal, ".cstring"))
- return ParseDirectiveSectionSwitch("__TEXT,__cstring",
- "cstring_literals");
- if (!strcmp(IDVal, ".literal4"))
- return ParseDirectiveSectionSwitch("__TEXT,__literal4", "4byte_literals");
- if (!strcmp(IDVal, ".literal8"))
- return ParseDirectiveSectionSwitch("__TEXT,__literal8", "8byte_literals");
- if (!strcmp(IDVal, ".literal16"))
- return ParseDirectiveSectionSwitch("__TEXT,__literal16",
- "16byte_literals");
- if (!strcmp(IDVal, ".constructor"))
- return ParseDirectiveSectionSwitch("__TEXT,__constructor");
- if (!strcmp(IDVal, ".destructor"))
- return ParseDirectiveSectionSwitch("__TEXT,__destructor");
- if (!strcmp(IDVal, ".fvmlib_init0"))
- return ParseDirectiveSectionSwitch("__TEXT,__fvmlib_init0");
- if (!strcmp(IDVal, ".fvmlib_init1"))
- return ParseDirectiveSectionSwitch("__TEXT,__fvmlib_init1");
- if (!strcmp(IDVal, ".symbol_stub")) // FIXME: Different on PPC.
- return ParseDirectiveSectionSwitch("__IMPORT,__jump_table,symbol_stubs",
- "self_modifying_code+pure_instructions,5");
- // FIXME: .picsymbol_stub on PPC.
- if (!strcmp(IDVal, ".data"))
- return ParseDirectiveSectionSwitch("__DATA,__data");
- if (!strcmp(IDVal, ".static_data"))
- return ParseDirectiveSectionSwitch("__DATA,__static_data");
- if (!strcmp(IDVal, ".non_lazy_symbol_pointer"))
- return ParseDirectiveSectionSwitch("__DATA,__nl_symbol_pointer",
- "non_lazy_symbol_pointers");
- if (!strcmp(IDVal, ".lazy_symbol_pointer"))
- return ParseDirectiveSectionSwitch("__DATA,__la_symbol_pointer",
- "lazy_symbol_pointers");
- if (!strcmp(IDVal, ".dyld"))
- return ParseDirectiveSectionSwitch("__DATA,__dyld");
- if (!strcmp(IDVal, ".mod_init_func"))
- return ParseDirectiveSectionSwitch("__DATA,__mod_init_func",
- "mod_init_funcs");
- if (!strcmp(IDVal, ".mod_term_func"))
- return ParseDirectiveSectionSwitch("__DATA,__mod_term_func",
- "mod_term_funcs");
- if (!strcmp(IDVal, ".const_data"))
- return ParseDirectiveSectionSwitch("__DATA,__const", "regular");
+ 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");
- // FIXME: Verify attributes on sections.
- if (!strcmp(IDVal, ".objc_class"))
- return ParseDirectiveSectionSwitch("__OBJC,__class");
- if (!strcmp(IDVal, ".objc_meta_class"))
- return ParseDirectiveSectionSwitch("__OBJC,__meta_class");
- if (!strcmp(IDVal, ".objc_cat_cls_meth"))
- return ParseDirectiveSectionSwitch("__OBJC,__cat_cls_meth");
- if (!strcmp(IDVal, ".objc_cat_inst_meth"))
- return ParseDirectiveSectionSwitch("__OBJC,__cat_inst_meth");
- if (!strcmp(IDVal, ".objc_protocol"))
- return ParseDirectiveSectionSwitch("__OBJC,__protocol");
- if (!strcmp(IDVal, ".objc_string_object"))
- return ParseDirectiveSectionSwitch("__OBJC,__string_object");
- if (!strcmp(IDVal, ".objc_cls_meth"))
- return ParseDirectiveSectionSwitch("__OBJC,__cls_meth");
- if (!strcmp(IDVal, ".objc_inst_meth"))
- return ParseDirectiveSectionSwitch("__OBJC,__inst_meth");
- if (!strcmp(IDVal, ".objc_cls_refs"))
- return ParseDirectiveSectionSwitch("__OBJC,__cls_refs");
- if (!strcmp(IDVal, ".objc_message_refs"))
- return ParseDirectiveSectionSwitch("__OBJC,__message_refs");
- if (!strcmp(IDVal, ".objc_symbols"))
- return ParseDirectiveSectionSwitch("__OBJC,__symbols");
- if (!strcmp(IDVal, ".objc_category"))
- return ParseDirectiveSectionSwitch("__OBJC,__category");
- if (!strcmp(IDVal, ".objc_class_vars"))
- return ParseDirectiveSectionSwitch("__OBJC,__class_vars");
- if (!strcmp(IDVal, ".objc_instance_vars"))
- return ParseDirectiveSectionSwitch("__OBJC,__instance_vars");
- if (!strcmp(IDVal, ".objc_module_info"))
- return ParseDirectiveSectionSwitch("__OBJC,__module_info");
- if (!strcmp(IDVal, ".objc_class_names"))
- return ParseDirectiveSectionSwitch("__TEXT,__cstring","cstring_literals");
- if (!strcmp(IDVal, ".objc_meth_var_types"))
- return ParseDirectiveSectionSwitch("__TEXT,__cstring","cstring_literals");
- if (!strcmp(IDVal, ".objc_meth_var_names"))
- return ParseDirectiveSectionSwitch("__TEXT,__cstring","cstring_literals");
- if (!strcmp(IDVal, ".objc_selector_strs"))
- return ParseDirectiveSectionSwitch("__OBJC,__selector_strs");
+ 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 (!strcmp(IDVal, ".set"))
+ if (IDVal == ".set")
return ParseDirectiveSet();
// Data directives
- if (!strcmp(IDVal, ".ascii"))
+ if (IDVal == ".ascii")
return ParseDirectiveAscii(false);
- if (!strcmp(IDVal, ".asciz"))
+ if (IDVal == ".asciz")
return ParseDirectiveAscii(true);
- // FIXME: Target hooks for size? Also for "word", "hword".
- if (!strcmp(IDVal, ".byte"))
+ if (IDVal == ".byte")
return ParseDirectiveValue(1);
- if (!strcmp(IDVal, ".short"))
+ if (IDVal == ".short")
return ParseDirectiveValue(2);
- if (!strcmp(IDVal, ".long"))
+ if (IDVal == ".long")
return ParseDirectiveValue(4);
- if (!strcmp(IDVal, ".quad"))
+ if (IDVal == ".quad")
return ParseDirectiveValue(8);
// FIXME: Target hooks for IsPow2.
- if (!strcmp(IDVal, ".align"))
+ if (IDVal == ".align")
return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
- if (!strcmp(IDVal, ".align32"))
+ if (IDVal == ".align32")
return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
- if (!strcmp(IDVal, ".balign"))
+ if (IDVal == ".balign")
return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
- if (!strcmp(IDVal, ".balignw"))
+ if (IDVal == ".balignw")
return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
- if (!strcmp(IDVal, ".balignl"))
+ if (IDVal == ".balignl")
return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
- if (!strcmp(IDVal, ".p2align"))
+ if (IDVal == ".p2align")
return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
- if (!strcmp(IDVal, ".p2alignw"))
+ if (IDVal == ".p2alignw")
return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
- if (!strcmp(IDVal, ".p2alignl"))
+ if (IDVal == ".p2alignl")
return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
- if (!strcmp(IDVal, ".org"))
+ if (IDVal == ".org")
return ParseDirectiveOrg();
- if (!strcmp(IDVal, ".fill"))
+ if (IDVal == ".fill")
return ParseDirectiveFill();
- if (!strcmp(IDVal, ".space"))
+ if (IDVal == ".space")
return ParseDirectiveSpace();
// Symbol attribute directives
- if (!strcmp(IDVal, ".globl") || !strcmp(IDVal, ".global"))
+
+ if (IDVal == ".globl" || IDVal == ".global")
return ParseDirectiveSymbolAttribute(MCStreamer::Global);
- if (!strcmp(IDVal, ".hidden"))
+ if (IDVal == ".hidden")
return ParseDirectiveSymbolAttribute(MCStreamer::Hidden);
- if (!strcmp(IDVal, ".indirect_symbol"))
+ if (IDVal == ".indirect_symbol")
return ParseDirectiveSymbolAttribute(MCStreamer::IndirectSymbol);
- if (!strcmp(IDVal, ".internal"))
+ if (IDVal == ".internal")
return ParseDirectiveSymbolAttribute(MCStreamer::Internal);
- if (!strcmp(IDVal, ".lazy_reference"))
+ if (IDVal == ".lazy_reference")
return ParseDirectiveSymbolAttribute(MCStreamer::LazyReference);
- if (!strcmp(IDVal, ".no_dead_strip"))
+ if (IDVal == ".no_dead_strip")
return ParseDirectiveSymbolAttribute(MCStreamer::NoDeadStrip);
- if (!strcmp(IDVal, ".private_extern"))
+ if (IDVal == ".private_extern")
return ParseDirectiveSymbolAttribute(MCStreamer::PrivateExtern);
- if (!strcmp(IDVal, ".protected"))
+ if (IDVal == ".protected")
return ParseDirectiveSymbolAttribute(MCStreamer::Protected);
- if (!strcmp(IDVal, ".reference"))
+ if (IDVal == ".reference")
return ParseDirectiveSymbolAttribute(MCStreamer::Reference);
- if (!strcmp(IDVal, ".weak"))
+ if (IDVal == ".weak")
return ParseDirectiveSymbolAttribute(MCStreamer::Weak);
- if (!strcmp(IDVal, ".weak_definition"))
+ if (IDVal == ".weak_definition")
return ParseDirectiveSymbolAttribute(MCStreamer::WeakDefinition);
- if (!strcmp(IDVal, ".weak_reference"))
+ if (IDVal == ".weak_reference")
return ParseDirectiveSymbolAttribute(MCStreamer::WeakReference);
+ 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);
+
+ // Target hook for parsing target specific directives.
+ if (!getTargetParser().ParseDirective(ID))
+ return false;
+
Warning(IDLoc, "ignoring directive for now");
EatToEndOfStatement();
return false;
}
MCInst Inst;
- if (ParseX86InstOperands(IDVal, Inst))
+ if (getTargetParser().ParseInstruction(IDVal, Inst))
return true;
- if (Lexer.isNot(asmtok::EndOfStatement))
+ if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in argument list");
// Eat the end of statement marker.
@@ -542,15 +715,16 @@ bool AsmParser::ParseStatement() {
return false;
}
-bool AsmParser::ParseAssignment(const char *Name, bool IsDotSet) {
+bool AsmParser::ParseAssignment(const StringRef &Name) {
// FIXME: Use better location, we should use proper tokens.
SMLoc EqualLoc = Lexer.getLoc();
- MCValue Value;
- if (ParseRelocatableExpression(Value))
+ const MCExpr *Value;
+ SMLoc StartLoc = Lexer.getLoc();
+ if (ParseExpression(Value))
return true;
- if (Lexer.isNot(asmtok::EndOfStatement))
+ if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in assignment");
// Eat the end of statement marker.
@@ -559,18 +733,29 @@ bool AsmParser::ParseAssignment(const char *Name, bool IsDotSet) {
// Diagnose assignment to 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.
// FIXME: Handle '.'.
// FIXME: Diagnose assignment to protected identifier (e.g., register name).
- MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name);
- if (Sym->getSection())
- return Error(EqualLoc, "invalid assignment to symbol emitted as a label");
- if (Sym->isExternal())
- return Error(EqualLoc, "invalid assignment to external symbol");
+ MCSymbol *Sym = CreateSymbol(Name);
+ if (!Sym->isUndefined() && !Sym->isAbsolute())
+ return Error(EqualLoc, "symbol has already been defined");
// Do the assignment.
- Out.EmitAssignment(Sym, Value, IsDotSet);
+ Out.EmitAssignment(Sym, Value);
+
+ return false;
+}
+
+/// ParseIdentifier:
+/// ::= identifier
+/// ::= string
+bool AsmParser::ParseIdentifier(StringRef &Res) {
+ if (Lexer.isNot(AsmToken::Identifier) &&
+ Lexer.isNot(AsmToken::String))
+ return true;
+
+ Res = Lexer.getTok().getIdentifier();
+
+ Lexer.Lex(); // Consume the identifier token.
return false;
}
@@ -578,16 +763,16 @@ bool AsmParser::ParseAssignment(const char *Name, bool IsDotSet) {
/// ParseDirectiveSet:
/// ::= .set identifier ',' expression
bool AsmParser::ParseDirectiveSet() {
- if (Lexer.isNot(asmtok::Identifier))
- return TokError("expected identifier after '.set' directive");
+ StringRef Name;
- const char *Name = Lexer.getCurStrVal();
+ if (ParseIdentifier(Name))
+ return TokError("expected identifier after '.set' directive");
- if (Lexer.Lex() != asmtok::Comma)
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in '.set'");
Lexer.Lex();
- return ParseAssignment(Name, true);
+ return ParseAssignment(Name);
}
/// ParseDirectiveSection:
@@ -595,69 +780,152 @@ bool AsmParser::ParseDirectiveSet() {
/// FIXME: This should actually parse out the segment, section, attributes and
/// sizeof_stub fields.
bool AsmParser::ParseDirectiveDarwinSection() {
- if (Lexer.isNot(asmtok::Identifier))
- return TokError("expected identifier after '.section' directive");
-
- std::string Section = Lexer.getCurStrVal();
+ 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());
+
Lexer.Lex();
-
- // Accept a comma separated list of modifiers.
- while (Lexer.is(asmtok::Comma)) {
- Lexer.Lex();
-
- if (Lexer.isNot(asmtok::Identifier))
- return TokError("expected identifier in '.section' directive");
- Section += ',';
- Section += Lexer.getCurStrVal();
- Lexer.Lex();
- }
-
- if (Lexer.isNot(asmtok::EndOfStatement))
+ if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.section' directive");
Lexer.Lex();
- Out.SwitchSection(Ctx.GetSection(Section.c_str()));
+
+ 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.
+ Out.SwitchSection(getMachOSection(Segment, Section, TAA, StubSize,
+ SectionKind()));
return false;
}
-bool AsmParser::ParseDirectiveSectionSwitch(const char *Section,
- const char *Directives) {
- if (Lexer.isNot(asmtok::EndOfStatement))
+/// 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");
Lexer.Lex();
- std::string SectionStr = Section;
- if (Directives && Directives[0]) {
- SectionStr += ",";
- SectionStr += Directives;
+ // FIXME: Arch specific.
+ Out.SwitchSection(getMachOSection(Segment, Section, TAA, StubSize,
+ SectionKind()));
+
+ // 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!");
+
+ Data = "";
+ StringRef Str = Lexer.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;
+ }
}
-
- Out.SwitchSection(Ctx.GetSection(Section));
+
return false;
}
/// ParseDirectiveAscii:
/// ::= ( .ascii | .asciz ) [ "string" ( , "string" )* ]
bool AsmParser::ParseDirectiveAscii(bool ZeroTerminated) {
- if (Lexer.isNot(asmtok::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
for (;;) {
- if (Lexer.isNot(asmtok::String))
+ if (Lexer.isNot(AsmToken::String))
return TokError("expected string in '.ascii' or '.asciz' directive");
- // FIXME: This shouldn't use a const char* + strlen, the string could have
- // embedded nulls.
- // FIXME: Should have accessor for getting string contents.
- const char *Str = Lexer.getCurStrVal();
- Out.EmitBytes(Str + 1, strlen(Str) - 2);
+ std::string Data;
+ if (ParseEscapedString(Data))
+ return true;
+
+ Out.EmitBytes(Data);
if (ZeroTerminated)
- Out.EmitBytes("\0", 1);
+ Out.EmitBytes(StringRef("\0", 1));
Lexer.Lex();
- if (Lexer.is(asmtok::EndOfStatement))
+ if (Lexer.is(AsmToken::EndOfStatement))
break;
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in '.ascii' or '.asciz' directive");
Lexer.Lex();
}
@@ -670,19 +938,20 @@ bool AsmParser::ParseDirectiveAscii(bool ZeroTerminated) {
/// ParseDirectiveValue
/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
bool AsmParser::ParseDirectiveValue(unsigned Size) {
- if (Lexer.isNot(asmtok::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
for (;;) {
- MCValue Expr;
- if (ParseRelocatableExpression(Expr))
+ const MCExpr *Value;
+ SMLoc StartLoc = Lexer.getLoc();
+ if (ParseExpression(Value))
return true;
- Out.EmitValue(Expr, Size);
+ Out.EmitValue(Value, Size);
- if (Lexer.is(asmtok::EndOfStatement))
+ if (Lexer.is(AsmToken::EndOfStatement))
break;
// FIXME: Improve diagnostic.
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lexer.Lex();
}
@@ -701,8 +970,8 @@ bool AsmParser::ParseDirectiveSpace() {
int64_t FillExpr = 0;
bool HasFillExpr = false;
- if (Lexer.isNot(asmtok::EndOfStatement)) {
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in '.space' directive");
Lexer.Lex();
@@ -711,7 +980,7 @@ bool AsmParser::ParseDirectiveSpace() {
HasFillExpr = true;
- if (Lexer.isNot(asmtok::EndOfStatement))
+ if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.space' directive");
}
@@ -722,7 +991,7 @@ bool AsmParser::ParseDirectiveSpace() {
// FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
for (uint64_t i = 0, e = NumBytes; i != e; ++i)
- Out.EmitValue(MCValue::get(FillExpr), 1);
+ Out.EmitValue(MCConstantExpr::Create(FillExpr, getContext()), 1);
return false;
}
@@ -734,7 +1003,7 @@ bool AsmParser::ParseDirectiveFill() {
if (ParseAbsoluteExpression(NumValues))
return true;
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in '.fill' directive");
Lexer.Lex();
@@ -742,7 +1011,7 @@ bool AsmParser::ParseDirectiveFill() {
if (ParseAbsoluteExpression(FillSize))
return true;
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in '.fill' directive");
Lexer.Lex();
@@ -750,16 +1019,16 @@ bool AsmParser::ParseDirectiveFill() {
if (ParseAbsoluteExpression(FillExpr))
return true;
- if (Lexer.isNot(asmtok::EndOfStatement))
+ if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.fill' directive");
Lexer.Lex();
- if (FillSize != 1 && FillSize != 2 && FillSize != 4)
- return TokError("invalid '.fill' size, expected 1, 2, or 4");
+ if (FillSize != 1 && FillSize != 2 && FillSize != 4 && FillSize != 8)
+ return TokError("invalid '.fill' size, expected 1, 2, 4, or 8");
for (uint64_t i = 0, e = NumValues; i != e; ++i)
- Out.EmitValue(MCValue::get(FillExpr), FillSize);
+ Out.EmitValue(MCConstantExpr::Create(FillExpr, getContext()), FillSize);
return false;
}
@@ -767,21 +1036,22 @@ bool AsmParser::ParseDirectiveFill() {
/// ParseDirectiveOrg
/// ::= .org expression [ , expression ]
bool AsmParser::ParseDirectiveOrg() {
- MCValue Offset;
- if (ParseRelocatableExpression(Offset))
+ const MCExpr *Offset;
+ SMLoc StartLoc = Lexer.getLoc();
+ if (ParseExpression(Offset))
return true;
// Parse optional fill expression.
int64_t FillExpr = 0;
- if (Lexer.isNot(asmtok::EndOfStatement)) {
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in '.org' directive");
Lexer.Lex();
if (ParseAbsoluteExpression(FillExpr))
return true;
- if (Lexer.isNot(asmtok::EndOfStatement))
+ if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.org' directive");
}
@@ -797,6 +1067,7 @@ bool AsmParser::ParseDirectiveOrg() {
/// ParseDirectiveAlign
/// ::= {.align, ...} expression [ , expression [ , expression ]]
bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
+ SMLoc AlignmentLoc = Lexer.getLoc();
int64_t Alignment;
if (ParseAbsoluteExpression(Alignment))
return true;
@@ -805,22 +1076,22 @@ bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
bool HasFillExpr = false;
int64_t FillExpr = 0;
int64_t MaxBytesToFill = 0;
- if (Lexer.isNot(asmtok::EndOfStatement)) {
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lexer.Lex();
// The fill expression can be omitted while specifying a maximum number of
// alignment bytes, e.g:
// .align 3,,4
- if (Lexer.isNot(asmtok::Comma)) {
+ if (Lexer.isNot(AsmToken::Comma)) {
HasFillExpr = true;
if (ParseAbsoluteExpression(FillExpr))
return true;
}
- if (Lexer.isNot(asmtok::EndOfStatement)) {
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lexer.Lex();
@@ -828,7 +1099,7 @@ bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
if (ParseAbsoluteExpression(MaxBytesToFill))
return true;
- if (Lexer.isNot(asmtok::EndOfStatement))
+ if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
}
}
@@ -843,15 +1114,20 @@ bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
// Compute alignment in bytes.
if (IsPow2) {
// FIXME: Diagnose overflow.
- Alignment = 1 << Alignment;
+ if (Alignment >= 32) {
+ Error(AlignmentLoc, "invalid alignment value");
+ Alignment = 31;
+ }
+
+ Alignment = 1ULL << Alignment;
}
- // Diagnose non-sensical max bytes to fill.
+ // Diagnose non-sensical max bytes to align.
if (MaxBytesLoc.isValid()) {
if (MaxBytesToFill < 1) {
- Warning(MaxBytesLoc, "alignment directive can never be satisfied in this "
- "many bytes, ignoring");
- return false;
+ Error(MaxBytesLoc, "alignment directive can never be satisfied in this "
+ "many bytes, ignoring maximum bytes expression");
+ MaxBytesToFill = 0;
}
if (MaxBytesToFill >= Alignment) {
@@ -870,24 +1146,21 @@ bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
/// ParseDirectiveSymbolAttribute
/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
bool AsmParser::ParseDirectiveSymbolAttribute(MCStreamer::SymbolAttr Attr) {
- if (Lexer.isNot(asmtok::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
for (;;) {
- if (Lexer.isNot(asmtok::Identifier))
+ StringRef Name;
+
+ if (ParseIdentifier(Name))
return TokError("expected identifier in directive");
- MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
- Lexer.Lex();
-
- // If this is use of an undefined symbol then mark it external.
- if (!Sym->getSection() && !Ctx.GetSymbolValue(Sym))
- Sym->setExternal(true);
+ MCSymbol *Sym = CreateSymbol(Name);
Out.EmitSymbolAttribute(Sym, Attr);
- if (Lexer.is(asmtok::EndOfStatement))
+ if (Lexer.is(AsmToken::EndOfStatement))
break;
- if (Lexer.isNot(asmtok::Comma))
+ if (Lexer.isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lexer.Lex();
}
@@ -896,3 +1169,513 @@ bool AsmParser::ParseDirectiveSymbolAttribute(MCStreamer::SymbolAttr Attr) {
Lexer.Lex();
return false;
}
+
+/// ParseDirectiveDarwinSymbolDesc
+/// ::= .desc identifier , expression
+bool AsmParser::ParseDirectiveDarwinSymbolDesc() {
+ 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 '.desc' directive");
+ Lexer.Lex();
+
+ SMLoc DescLoc = Lexer.getLoc();
+ int64_t DescValue;
+ if (ParseAbsoluteExpression(DescValue))
+ return true;
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.desc' directive");
+
+ Lexer.Lex();
+
+ // Set the n_desc field of this Symbol to this DescValue
+ Out.EmitSymbolDesc(Sym, DescValue);
+
+ return false;
+}
+
+/// ParseDirectiveComm
+/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
+bool AsmParser::ParseDirectiveComm(bool IsLocal) {
+ SMLoc IDLoc = Lexer.getLoc();
+ 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 directive");
+ Lexer.Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = Lexer.getLoc();
+ if (ParseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (Lexer.is(AsmToken::Comma)) {
+ Lexer.Lex();
+ Pow2AlignmentLoc = Lexer.getLoc();
+ if (ParseAbsoluteExpression(Pow2Alignment))
+ return true;
+ }
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.comm' or '.lcomm' directive");
+
+ Lexer.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 assember
+ // 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");
+
+ // '.lcomm' is equivalent to '.zerofill'.
+ // Create the Symbol as a common or local common with Size and Pow2Alignment
+ if (IsLocal) {
+ Out.EmitZerofill(getMachOSection("__DATA", "__bss",
+ MCSectionMachO::S_ZEROFILL, 0,
+ SectionKind()),
+ 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 = Lexer.getTok().getString();
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::Identifier))
+ return TokError("expected section name after comma in '.zerofill' "
+ "directive");
+ StringRef Section = Lexer.getTok().getString();
+ Lexer.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(getMachOSection(Segment, Section,
+ MCSectionMachO::S_ZEROFILL, 0,
+ SectionKind()));
+ return false;
+ }
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lexer.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(Lexer.getTok().getString());
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lexer.Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = Lexer.getLoc();
+ if (ParseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (Lexer.is(AsmToken::Comma)) {
+ Lexer.Lex();
+ Pow2AlignmentLoc = Lexer.getLoc();
+ if (ParseAbsoluteExpression(Pow2Alignment))
+ return true;
+ }
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.zerofill' directive");
+
+ Lexer.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(getMachOSection(Segment, Section,
+ MCSectionMachO::S_ZEROFILL, 0,
+ SectionKind()),
+ 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");
+
+ Lexer.Lex();
+
+ Out.EmitAssemblerFlag(MCStreamer::SubsectionsViaSymbols);
+
+ return false;
+}
+
+/// ParseDirectiveAbort
+/// ::= .abort [ "abort_string" ]
+bool AsmParser::ParseDirectiveAbort() {
+ // FIXME: Use loc from directive.
+ SMLoc Loc = Lexer.getLoc();
+
+ StringRef Str = "";
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::String))
+ return TokError("expected string in '.abort' directive");
+
+ Str = Lexer.getTok().getString();
+
+ Lexer.Lex();
+ }
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.abort' directive");
+
+ Lexer.Lex();
+
+ // FIXME: Handle here.
+ if (Str.empty())
+ Error(Loc, ".abort detected. Assembly stopping.");
+ else
+ Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
+
+ 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");
+ Lexer.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");
+
+ Lexer.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))
+ return TokError("expected string in '.include' directive");
+
+ std::string Filename = Lexer.getTok().getString();
+ SMLoc IncludeLoc = Lexer.getLoc();
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.include' directive");
+
+ // Strip the quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
+
+ // Attempt to switch the lexer to the included file before consuming the end
+ // of statement to avoid losing it when we switch.
+ if (Lexer.EnterIncludeFile(Filename)) {
+ Lexer.PrintMessage(IncludeLoc,
+ "Could not find include file '" + Filename + "'",
+ "error");
+ 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");
+
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.dump' or '.load' directive");
+
+ Lexer.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) {
+ // Consume the identifier that was the .if directive
+ Lexer.Lex();
+
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+ if(TheCondState.Ignore) {
+ EatToEndOfStatement();
+ }
+ else {
+ int64_t ExprValue;
+ if (ParseAbsoluteExpression(ExprValue))
+ return true;
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.if' directive");
+
+ Lexer.Lex();
+
+ TheCondState.CondMet = ExprValue;
+ 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;
+
+ // Consume the identifier that was the .elseif directive
+ Lexer.Lex();
+
+ 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 (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.elseif' directive");
+
+ Lexer.Lex();
+ TheCondState.CondMet = ExprValue;
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveElse
+/// ::= .else
+bool AsmParser::ParseDirectiveElse(SMLoc DirectiveLoc) {
+ // Consume the identifier that was the .else directive
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.else' directive");
+
+ Lexer.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;
+}
+
+/// ParseDirectiveEndIf
+/// ::= .endif
+bool AsmParser::ParseDirectiveEndIf(SMLoc DirectiveLoc) {
+ // Consume the identifier that was the .endif directive
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.endif' directive");
+
+ Lexer.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;
+}
+
+/// ParseDirectiveFile
+/// ::= .file [number] string
+bool AsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
+ // FIXME: I'm not sure what this is.
+ int64_t FileNumber = -1;
+ if (Lexer.is(AsmToken::Integer)) {
+ FileNumber = Lexer.getTok().getIntVal();
+ Lexer.Lex();
+
+ if (FileNumber < 1)
+ return TokError("file number less than one");
+ }
+
+ if (Lexer.isNot(AsmToken::String))
+ return TokError("unexpected token in '.file' directive");
+
+ StringRef FileName = Lexer.getTok().getString();
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.file' directive");
+
+ // FIXME: Do something with the .file.
+
+ return false;
+}
+
+/// ParseDirectiveLine
+/// ::= .line [number]
+bool AsmParser::ParseDirectiveLine(StringRef, SMLoc DirectiveLoc) {
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::Integer))
+ return TokError("unexpected token in '.line' directive");
+
+ int64_t LineNumber = Lexer.getTok().getIntVal();
+ (void) LineNumber;
+ Lexer.Lex();
+
+ // FIXME: Do something with the .line.
+ }
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.file' directive");
+
+ return false;
+}
+
+
+/// ParseDirectiveLoc
+/// ::= .loc number [number [number]]
+bool AsmParser::ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc) {
+ if (Lexer.isNot(AsmToken::Integer))
+ return TokError("unexpected token in '.loc' directive");
+
+ // FIXME: What are these fields?
+ int64_t FileNumber = Lexer.getTok().getIntVal();
+ (void) FileNumber;
+ // FIXME: Validate file.
+
+ Lexer.Lex();
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::Integer))
+ return TokError("unexpected token in '.loc' directive");
+
+ int64_t Param2 = Lexer.getTok().getIntVal();
+ (void) Param2;
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::Integer))
+ return TokError("unexpected token in '.loc' directive");
+
+ int64_t Param3 = Lexer.getTok().getIntVal();
+ (void) Param3;
+ Lexer.Lex();
+
+ // FIXME: Do something with the .loc.
+ }
+ }
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.file' directive");
+
+ return false;
+}
+
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