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-rw-r--r--contrib/llvm/lib/MC/MCParser/AsmLexer.cpp469
-rw-r--r--contrib/llvm/lib/MC/MCParser/AsmParser.cpp3411
-rw-r--r--contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp498
-rw-r--r--contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp747
-rw-r--r--contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp611
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp31
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp48
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp22
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp19
9 files changed, 5856 insertions, 0 deletions
diff --git a/contrib/llvm/lib/MC/MCParser/AsmLexer.cpp b/contrib/llvm/lib/MC/MCParser/AsmLexer.cpp
new file mode 100644
index 0000000..c76052d
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/AsmLexer.cpp
@@ -0,0 +1,469 @@
+//===- AsmLexer.cpp - Lexer for Assembly Files ----------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements the lexer for assembly files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/AsmLexer.h"
+#include "llvm/Support/SMLoc.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include <cctype>
+#include <cerrno>
+#include <cstdio>
+#include <cstdlib>
+using namespace llvm;
+
+AsmLexer::AsmLexer(const MCAsmInfo &_MAI) : MAI(_MAI) {
+ CurBuf = NULL;
+ CurPtr = NULL;
+ isAtStartOfLine = true;
+}
+
+AsmLexer::~AsmLexer() {
+}
+
+void AsmLexer::setBuffer(const MemoryBuffer *buf, const char *ptr) {
+ CurBuf = buf;
+
+ if (ptr)
+ CurPtr = ptr;
+ else
+ CurPtr = CurBuf->getBufferStart();
+
+ TokStart = 0;
+}
+
+/// ReturnError - Set the error to the specified string at the specified
+/// location. This is defined to always return AsmToken::Error.
+AsmToken AsmLexer::ReturnError(const char *Loc, const std::string &Msg) {
+ SetError(SMLoc::getFromPointer(Loc), Msg);
+
+ return AsmToken(AsmToken::Error, StringRef(Loc, 0));
+}
+
+int AsmLexer::getNextChar() {
+ char CurChar = *CurPtr++;
+ switch (CurChar) {
+ default:
+ return (unsigned char)CurChar;
+ case 0:
+ // A nul character in the stream is either the end of the current buffer or
+ // a random nul in the file. Disambiguate that here.
+ if (CurPtr-1 != CurBuf->getBufferEnd())
+ return 0; // Just whitespace.
+
+ // Otherwise, return end of file.
+ --CurPtr; // Another call to lex will return EOF again.
+ return EOF;
+ }
+}
+
+/// LexFloatLiteral: [0-9]*[.][0-9]*([eE][+-]?[0-9]*)?
+///
+/// The leading integral digit sequence and dot should have already been
+/// consumed, some or all of the fractional digit sequence *can* have been
+/// consumed.
+AsmToken AsmLexer::LexFloatLiteral() {
+ // Skip the fractional digit sequence.
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+
+ // Check for exponent; we intentionally accept a slighlty wider set of
+ // literals here and rely on the upstream client to reject invalid ones (e.g.,
+ // "1e+").
+ if (*CurPtr == 'e' || *CurPtr == 'E') {
+ ++CurPtr;
+ if (*CurPtr == '-' || *CurPtr == '+')
+ ++CurPtr;
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+ }
+
+ return AsmToken(AsmToken::Real,
+ StringRef(TokStart, CurPtr - TokStart));
+}
+
+/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
+static bool IsIdentifierChar(char c) {
+ return isalnum(c) || c == '_' || c == '$' || c == '.' || c == '@';
+}
+AsmToken AsmLexer::LexIdentifier() {
+ // Check for floating point literals.
+ if (CurPtr[-1] == '.' && isdigit(*CurPtr)) {
+ // Disambiguate a .1243foo identifier from a floating literal.
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+ if (*CurPtr == 'e' || *CurPtr == 'E' || !IsIdentifierChar(*CurPtr))
+ return LexFloatLiteral();
+ }
+
+ while (IsIdentifierChar(*CurPtr))
+ ++CurPtr;
+
+ // Handle . as a special case.
+ if (CurPtr == TokStart+1 && TokStart[0] == '.')
+ return AsmToken(AsmToken::Dot, StringRef(TokStart, 1));
+
+ return AsmToken(AsmToken::Identifier, StringRef(TokStart, CurPtr - TokStart));
+}
+
+/// LexSlash: Slash: /
+/// C-Style Comment: /* ... */
+AsmToken AsmLexer::LexSlash() {
+ switch (*CurPtr) {
+ case '*': break; // C style comment.
+ case '/': return ++CurPtr, LexLineComment();
+ default: return AsmToken(AsmToken::Slash, StringRef(CurPtr-1, 1));
+ }
+
+ // C Style comment.
+ ++CurPtr; // skip the star.
+ while (1) {
+ int CurChar = getNextChar();
+ switch (CurChar) {
+ case EOF:
+ return ReturnError(TokStart, "unterminated comment");
+ case '*':
+ // End of the comment?
+ if (CurPtr[0] != '/') break;
+
+ ++CurPtr; // End the */.
+ return LexToken();
+ }
+ }
+}
+
+/// LexLineComment: Comment: #[^\n]*
+/// : //[^\n]*
+AsmToken AsmLexer::LexLineComment() {
+ // FIXME: This is broken if we happen to a comment at the end of a file, which
+ // was .included, and which doesn't end with a newline.
+ int CurChar = getNextChar();
+ while (CurChar != '\n' && CurChar != '\r' && CurChar != EOF)
+ CurChar = getNextChar();
+
+ if (CurChar == EOF)
+ return AsmToken(AsmToken::Eof, StringRef(CurPtr, 0));
+ return AsmToken(AsmToken::EndOfStatement, StringRef(CurPtr, 0));
+}
+
+static void SkipIgnoredIntegerSuffix(const char *&CurPtr) {
+ if (CurPtr[0] == 'L' && CurPtr[1] == 'L')
+ CurPtr += 2;
+ if (CurPtr[0] == 'U' && CurPtr[1] == 'L' && CurPtr[2] == 'L')
+ CurPtr += 3;
+}
+
+/// LexDigit: First character is [0-9].
+/// Local Label: [0-9][:]
+/// Forward/Backward Label: [0-9][fb]
+/// Binary integer: 0b[01]+
+/// Octal integer: 0[0-7]+
+/// Hex integer: 0x[0-9a-fA-F]+
+/// Decimal integer: [1-9][0-9]*
+AsmToken AsmLexer::LexDigit() {
+ // Decimal integer: [1-9][0-9]*
+ if (CurPtr[-1] != '0' || CurPtr[0] == '.') {
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+
+ // Check for floating point literals.
+ if (*CurPtr == '.' || *CurPtr == 'e') {
+ ++CurPtr;
+ return LexFloatLiteral();
+ }
+
+ StringRef Result(TokStart, CurPtr - TokStart);
+
+ long long Value;
+ if (Result.getAsInteger(10, Value)) {
+ // Allow positive values that are too large to fit into a signed 64-bit
+ // integer, but that do fit in an unsigned one, we just convert them over.
+ unsigned long long UValue;
+ if (Result.getAsInteger(10, UValue))
+ return ReturnError(TokStart, "invalid decimal number");
+ Value = (long long)UValue;
+ }
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
+ // suffixes on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return AsmToken(AsmToken::Integer, Result, Value);
+ }
+
+ if (*CurPtr == 'b') {
+ ++CurPtr;
+ // See if we actually have "0b" as part of something like "jmp 0b\n"
+ if (!isdigit(CurPtr[0])) {
+ --CurPtr;
+ StringRef Result(TokStart, CurPtr - TokStart);
+ return AsmToken(AsmToken::Integer, Result, 0);
+ }
+ const char *NumStart = CurPtr;
+ while (CurPtr[0] == '0' || CurPtr[0] == '1')
+ ++CurPtr;
+
+ // Requires at least one binary digit.
+ if (CurPtr == NumStart)
+ return ReturnError(TokStart, "invalid binary number");
+
+ StringRef Result(TokStart, CurPtr - TokStart);
+
+ long long Value;
+ if (Result.substr(2).getAsInteger(2, Value))
+ return ReturnError(TokStart, "invalid binary number");
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
+ // suffixes on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return AsmToken(AsmToken::Integer, Result, Value);
+ }
+
+ if (*CurPtr == 'x') {
+ ++CurPtr;
+ const char *NumStart = CurPtr;
+ while (isxdigit(CurPtr[0]))
+ ++CurPtr;
+
+ // Requires at least one hex digit.
+ if (CurPtr == NumStart)
+ return ReturnError(CurPtr-2, "invalid hexadecimal number");
+
+ unsigned long long Result;
+ if (StringRef(TokStart, CurPtr - TokStart).getAsInteger(0, Result))
+ return ReturnError(TokStart, "invalid hexadecimal number");
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
+ // suffixes on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return AsmToken(AsmToken::Integer, StringRef(TokStart, CurPtr - TokStart),
+ (int64_t)Result);
+ }
+
+ // Must be an octal number, it starts with 0.
+ while (*CurPtr >= '0' && *CurPtr <= '9')
+ ++CurPtr;
+
+ StringRef Result(TokStart, CurPtr - TokStart);
+ long long Value;
+ if (Result.getAsInteger(8, Value))
+ return ReturnError(TokStart, "invalid octal number");
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
+ // suffixes on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return AsmToken(AsmToken::Integer, Result, Value);
+}
+
+/// LexSingleQuote: Integer: 'b'
+AsmToken AsmLexer::LexSingleQuote() {
+ int CurChar = getNextChar();
+
+ if (CurChar == '\\')
+ CurChar = getNextChar();
+
+ if (CurChar == EOF)
+ return ReturnError(TokStart, "unterminated single quote");
+
+ CurChar = getNextChar();
+
+ if (CurChar != '\'')
+ return ReturnError(TokStart, "single quote way too long");
+
+ // The idea here being that 'c' is basically just an integral
+ // constant.
+ StringRef Res = StringRef(TokStart,CurPtr - TokStart);
+ long long Value;
+
+ if (Res.startswith("\'\\")) {
+ char theChar = Res[2];
+ switch (theChar) {
+ default: Value = theChar; break;
+ case '\'': Value = '\''; break;
+ case 't': Value = '\t'; break;
+ case 'n': Value = '\n'; break;
+ case 'b': Value = '\b'; break;
+ }
+ } else
+ Value = TokStart[1];
+
+ return AsmToken(AsmToken::Integer, Res, Value);
+}
+
+
+/// LexQuote: String: "..."
+AsmToken AsmLexer::LexQuote() {
+ int CurChar = getNextChar();
+ // TODO: does gas allow multiline string constants?
+ while (CurChar != '"') {
+ if (CurChar == '\\') {
+ // Allow \", etc.
+ CurChar = getNextChar();
+ }
+
+ if (CurChar == EOF)
+ return ReturnError(TokStart, "unterminated string constant");
+
+ CurChar = getNextChar();
+ }
+
+ return AsmToken(AsmToken::String, StringRef(TokStart, CurPtr - TokStart));
+}
+
+StringRef AsmLexer::LexUntilEndOfStatement() {
+ TokStart = CurPtr;
+
+ while (!isAtStartOfComment(*CurPtr) && // Start of line comment.
+ !isAtStatementSeparator(CurPtr) && // End of statement marker.
+ *CurPtr != '\n' &&
+ *CurPtr != '\r' &&
+ (*CurPtr != 0 || CurPtr != CurBuf->getBufferEnd())) {
+ ++CurPtr;
+ }
+ return StringRef(TokStart, CurPtr-TokStart);
+}
+
+StringRef AsmLexer::LexUntilEndOfLine() {
+ TokStart = CurPtr;
+
+ while (*CurPtr != '\n' &&
+ *CurPtr != '\r' &&
+ (*CurPtr != 0 || CurPtr != CurBuf->getBufferEnd())) {
+ ++CurPtr;
+ }
+ return StringRef(TokStart, CurPtr-TokStart);
+}
+
+bool AsmLexer::isAtStartOfComment(char Char) {
+ // FIXME: This won't work for multi-character comment indicators like "//".
+ return Char == *MAI.getCommentString();
+}
+
+bool AsmLexer::isAtStatementSeparator(const char *Ptr) {
+ return strncmp(Ptr, MAI.getSeparatorString(),
+ strlen(MAI.getSeparatorString())) == 0;
+}
+
+AsmToken AsmLexer::LexToken() {
+ TokStart = CurPtr;
+ // This always consumes at least one character.
+ int CurChar = getNextChar();
+
+ if (isAtStartOfComment(CurChar)) {
+ // If this comment starts with a '#', then return the Hash token and let
+ // the assembler parser see if it can be parsed as a cpp line filename
+ // comment. We do this only if we are at the start of a line.
+ if (CurChar == '#' && isAtStartOfLine)
+ return AsmToken(AsmToken::Hash, StringRef(TokStart, 1));
+ isAtStartOfLine = true;
+ return LexLineComment();
+ }
+ if (isAtStatementSeparator(TokStart)) {
+ CurPtr += strlen(MAI.getSeparatorString()) - 1;
+ return AsmToken(AsmToken::EndOfStatement,
+ StringRef(TokStart, strlen(MAI.getSeparatorString())));
+ }
+
+ // If we're missing a newline at EOF, make sure we still get an
+ // EndOfStatement token before the Eof token.
+ if (CurChar == EOF && !isAtStartOfLine) {
+ isAtStartOfLine = true;
+ return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
+ }
+
+ isAtStartOfLine = false;
+ switch (CurChar) {
+ default:
+ // Handle identifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
+ if (isalpha(CurChar) || CurChar == '_' || CurChar == '.')
+ return LexIdentifier();
+
+ // Unknown character, emit an error.
+ return ReturnError(TokStart, "invalid character in input");
+ case EOF: return AsmToken(AsmToken::Eof, StringRef(TokStart, 0));
+ case 0:
+ case ' ':
+ case '\t':
+ // Ignore whitespace.
+ return LexToken();
+ case '\n': // FALL THROUGH.
+ case '\r':
+ isAtStartOfLine = true;
+ return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
+ case ':': return AsmToken(AsmToken::Colon, StringRef(TokStart, 1));
+ case '+': return AsmToken(AsmToken::Plus, StringRef(TokStart, 1));
+ case '-': return AsmToken(AsmToken::Minus, StringRef(TokStart, 1));
+ case '~': return AsmToken(AsmToken::Tilde, StringRef(TokStart, 1));
+ case '(': return AsmToken(AsmToken::LParen, StringRef(TokStart, 1));
+ case ')': return AsmToken(AsmToken::RParen, StringRef(TokStart, 1));
+ case '[': return AsmToken(AsmToken::LBrac, StringRef(TokStart, 1));
+ case ']': return AsmToken(AsmToken::RBrac, StringRef(TokStart, 1));
+ case '{': return AsmToken(AsmToken::LCurly, StringRef(TokStart, 1));
+ case '}': return AsmToken(AsmToken::RCurly, StringRef(TokStart, 1));
+ case '*': return AsmToken(AsmToken::Star, StringRef(TokStart, 1));
+ case ',': return AsmToken(AsmToken::Comma, StringRef(TokStart, 1));
+ case '$': return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
+ case '@': return AsmToken(AsmToken::At, StringRef(TokStart, 1));
+ case '\\': return AsmToken(AsmToken::BackSlash, StringRef(TokStart, 1));
+ case '=':
+ if (*CurPtr == '=')
+ return ++CurPtr, AsmToken(AsmToken::EqualEqual, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Equal, StringRef(TokStart, 1));
+ case '|':
+ if (*CurPtr == '|')
+ return ++CurPtr, AsmToken(AsmToken::PipePipe, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Pipe, StringRef(TokStart, 1));
+ case '^': return AsmToken(AsmToken::Caret, StringRef(TokStart, 1));
+ case '&':
+ if (*CurPtr == '&')
+ return ++CurPtr, AsmToken(AsmToken::AmpAmp, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Amp, StringRef(TokStart, 1));
+ case '!':
+ if (*CurPtr == '=')
+ return ++CurPtr, AsmToken(AsmToken::ExclaimEqual, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Exclaim, StringRef(TokStart, 1));
+ case '%': return AsmToken(AsmToken::Percent, StringRef(TokStart, 1));
+ case '/': return LexSlash();
+ case '#': return AsmToken(AsmToken::Hash, StringRef(TokStart, 1));
+ case '\'': return LexSingleQuote();
+ case '"': return LexQuote();
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ return LexDigit();
+ case '<':
+ switch (*CurPtr) {
+ case '<': return ++CurPtr, AsmToken(AsmToken::LessLess,
+ StringRef(TokStart, 2));
+ case '=': return ++CurPtr, AsmToken(AsmToken::LessEqual,
+ StringRef(TokStart, 2));
+ case '>': return ++CurPtr, AsmToken(AsmToken::LessGreater,
+ StringRef(TokStart, 2));
+ default: return AsmToken(AsmToken::Less, StringRef(TokStart, 1));
+ }
+ case '>':
+ switch (*CurPtr) {
+ case '>': return ++CurPtr, AsmToken(AsmToken::GreaterGreater,
+ StringRef(TokStart, 2));
+ case '=': return ++CurPtr, AsmToken(AsmToken::GreaterEqual,
+ StringRef(TokStart, 2));
+ default: return AsmToken(AsmToken::Greater, StringRef(TokStart, 1));
+ }
+
+ // TODO: Quoted identifiers (objc methods etc)
+ // local labels: [0-9][:]
+ // Forward/backward labels: [0-9][fb]
+ // Integers, fp constants, character constants.
+ }
+}
diff --git a/contrib/llvm/lib/MC/MCParser/AsmParser.cpp b/contrib/llvm/lib/MC/MCParser/AsmParser.cpp
new file mode 100644
index 0000000..b67c769
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -0,0 +1,3411 @@
+//===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements the parser for assembly files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCParser/AsmCond.h"
+#include "llvm/MC/MCParser/AsmLexer.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cctype>
+#include <vector>
+using namespace llvm;
+
+static cl::opt<bool>
+FatalAssemblerWarnings("fatal-assembler-warnings",
+ cl::desc("Consider warnings as error"));
+
+namespace {
+
+/// \brief Helper class for tracking macro definitions.
+typedef std::vector<AsmToken> MacroArgument;
+typedef std::vector<MacroArgument> MacroArguments;
+typedef StringRef MacroParameter;
+typedef std::vector<MacroParameter> MacroParameters;
+
+struct Macro {
+ StringRef Name;
+ StringRef Body;
+ MacroParameters Parameters;
+
+public:
+ Macro(StringRef N, StringRef B, const MacroParameters &P) :
+ Name(N), Body(B), Parameters(P) {}
+};
+
+/// \brief Helper class for storing information about an active macro
+/// instantiation.
+struct MacroInstantiation {
+ /// The macro being instantiated.
+ const Macro *TheMacro;
+
+ /// The macro instantiation with substitutions.
+ MemoryBuffer *Instantiation;
+
+ /// The location of the instantiation.
+ SMLoc InstantiationLoc;
+
+ /// The location where parsing should resume upon instantiation completion.
+ SMLoc ExitLoc;
+
+public:
+ MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL,
+ MemoryBuffer *I);
+};
+
+/// \brief The concrete assembly parser instance.
+class AsmParser : public MCAsmParser {
+ friend class GenericAsmParser;
+
+ AsmParser(const AsmParser &); // DO NOT IMPLEMENT
+ void operator=(const AsmParser &); // DO NOT IMPLEMENT
+private:
+ AsmLexer Lexer;
+ MCContext &Ctx;
+ MCStreamer &Out;
+ const MCAsmInfo &MAI;
+ SourceMgr &SrcMgr;
+ SourceMgr::DiagHandlerTy SavedDiagHandler;
+ void *SavedDiagContext;
+ MCAsmParserExtension *GenericParser;
+ MCAsmParserExtension *PlatformParser;
+
+ /// This is the current buffer index we're lexing from as managed by the
+ /// SourceMgr object.
+ int CurBuffer;
+
+ AsmCond TheCondState;
+ std::vector<AsmCond> TheCondStack;
+
+ /// DirectiveMap - This is a table handlers for directives. Each handler is
+ /// invoked after the directive identifier is read and is responsible for
+ /// parsing and validating the rest of the directive. The handler is passed
+ /// in the directive name and the location of the directive keyword.
+ StringMap<std::pair<MCAsmParserExtension*, DirectiveHandler> > DirectiveMap;
+
+ /// MacroMap - Map of currently defined macros.
+ StringMap<Macro*> MacroMap;
+
+ /// ActiveMacros - Stack of active macro instantiations.
+ std::vector<MacroInstantiation*> ActiveMacros;
+
+ /// Boolean tracking whether macro substitution is enabled.
+ unsigned MacrosEnabled : 1;
+
+ /// Flag tracking whether any errors have been encountered.
+ unsigned HadError : 1;
+
+ /// The values from the last parsed cpp hash file line comment if any.
+ StringRef CppHashFilename;
+ int64_t CppHashLineNumber;
+ SMLoc CppHashLoc;
+
+ /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
+ unsigned AssemblerDialect;
+
+public:
+ AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
+ const MCAsmInfo &MAI);
+ ~AsmParser();
+
+ virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false);
+
+ void AddDirectiveHandler(MCAsmParserExtension *Object,
+ StringRef Directive,
+ DirectiveHandler Handler) {
+ DirectiveMap[Directive] = std::make_pair(Object, Handler);
+ }
+
+public:
+ /// @name MCAsmParser Interface
+ /// {
+
+ virtual SourceMgr &getSourceManager() { return SrcMgr; }
+ virtual MCAsmLexer &getLexer() { return Lexer; }
+ virtual MCContext &getContext() { return Ctx; }
+ virtual MCStreamer &getStreamer() { return Out; }
+ virtual unsigned getAssemblerDialect() {
+ if (AssemblerDialect == ~0U)
+ return MAI.getAssemblerDialect();
+ else
+ return AssemblerDialect;
+ }
+ virtual void setAssemblerDialect(unsigned i) {
+ AssemblerDialect = i;
+ }
+
+ virtual bool Warning(SMLoc L, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = ArrayRef<SMRange>());
+ virtual bool Error(SMLoc L, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = ArrayRef<SMRange>());
+
+ const AsmToken &Lex();
+
+ bool ParseExpression(const MCExpr *&Res);
+ virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc);
+ virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc);
+ virtual bool ParseAbsoluteExpression(int64_t &Res);
+
+ /// }
+
+private:
+ void CheckForValidSection();
+
+ bool ParseStatement();
+ void EatToEndOfLine();
+ bool ParseCppHashLineFilenameComment(const SMLoc &L);
+
+ bool HandleMacroEntry(StringRef Name, SMLoc NameLoc, const Macro *M);
+ bool expandMacro(raw_svector_ostream &OS, StringRef Body,
+ const MacroParameters &Parameters,
+ const MacroArguments &A,
+ const SMLoc &L);
+ void HandleMacroExit();
+
+ void PrintMacroInstantiations();
+ void PrintMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = ArrayRef<SMRange>()) const {
+ SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
+ }
+ static void DiagHandler(const SMDiagnostic &Diag, void *Context);
+
+ /// EnterIncludeFile - Enter the specified file. This returns true on failure.
+ bool EnterIncludeFile(const std::string &Filename);
+ /// ProcessIncbinFile - Process the specified file for the .incbin directive.
+ /// This returns true on failure.
+ bool ProcessIncbinFile(const std::string &Filename);
+
+ /// \brief Reset the current lexer position to that given by \arg Loc. The
+ /// current token is not set; clients should ensure Lex() is called
+ /// subsequently.
+ void JumpToLoc(SMLoc Loc);
+
+ void EatToEndOfStatement();
+
+ bool ParseMacroArgument(MacroArgument &MA);
+ bool ParseMacroArguments(const Macro *M, MacroArguments &A);
+
+ /// \brief Parse up to the end of statement and a return the contents from the
+ /// current token until the end of the statement; the current token on exit
+ /// will be either the EndOfStatement or EOF.
+ StringRef ParseStringToEndOfStatement();
+
+ /// \brief Parse until the end of a statement or a comma is encountered,
+ /// return the contents from the current token up to the end or comma.
+ StringRef ParseStringToComma();
+
+ bool ParseAssignment(StringRef Name, bool allow_redef);
+
+ bool ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
+ bool ParseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
+
+ /// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
+ /// and set \arg Res to the identifier contents.
+ bool ParseIdentifier(StringRef &Res);
+
+ // Directive Parsing.
+
+ // ".ascii", ".asciiz", ".string"
+ bool ParseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
+ bool ParseDirectiveValue(unsigned Size); // ".byte", ".long", ...
+ bool ParseDirectiveRealValue(const fltSemantics &); // ".single", ...
+ bool ParseDirectiveFill(); // ".fill"
+ bool ParseDirectiveSpace(); // ".space"
+ bool ParseDirectiveZero(); // ".zero"
+ bool ParseDirectiveSet(StringRef IDVal, bool allow_redef); // ".set", ".equ", ".equiv"
+ bool ParseDirectiveOrg(); // ".org"
+ // ".align{,32}", ".p2align{,w,l}"
+ bool ParseDirectiveAlign(bool IsPow2, unsigned ValueSize);
+
+ /// ParseDirectiveSymbolAttribute - Parse a directive like ".globl" which
+ /// accepts a single symbol (which should be a label or an external).
+ bool ParseDirectiveSymbolAttribute(MCSymbolAttr Attr);
+
+ bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
+
+ bool ParseDirectiveAbort(); // ".abort"
+ bool ParseDirectiveInclude(); // ".include"
+ bool ParseDirectiveIncbin(); // ".incbin"
+
+ bool ParseDirectiveIf(SMLoc DirectiveLoc); // ".if"
+ // ".ifb" or ".ifnb", depending on ExpectBlank.
+ bool ParseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
+ // ".ifc" or ".ifnc", depending on ExpectEqual.
+ bool ParseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
+ // ".ifdef" or ".ifndef", depending on expect_defined
+ bool ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
+ bool ParseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
+ bool ParseDirectiveElse(SMLoc DirectiveLoc); // ".else"
+ bool ParseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
+
+ /// ParseEscapedString - Parse the current token as a string which may include
+ /// escaped characters and return the string contents.
+ bool ParseEscapedString(std::string &Data);
+
+ const MCExpr *ApplyModifierToExpr(const MCExpr *E,
+ MCSymbolRefExpr::VariantKind Variant);
+
+ // Macro-like directives
+ Macro *ParseMacroLikeBody(SMLoc DirectiveLoc);
+ void InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS);
+ bool ParseDirectiveRept(SMLoc DirectiveLoc); // ".rept"
+ bool ParseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
+ bool ParseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
+ bool ParseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
+};
+
+/// \brief Generic implementations of directive handling, etc. which is shared
+/// (or the default, at least) for all assembler parser.
+class GenericAsmParser : public MCAsmParserExtension {
+ template<bool (GenericAsmParser::*Handler)(StringRef, SMLoc)>
+ void AddDirectiveHandler(StringRef Directive) {
+ getParser().AddDirectiveHandler(this, Directive,
+ HandleDirective<GenericAsmParser, Handler>);
+ }
+public:
+ GenericAsmParser() {}
+
+ AsmParser &getParser() {
+ return (AsmParser&) this->MCAsmParserExtension::getParser();
+ }
+
+ virtual void Initialize(MCAsmParser &Parser) {
+ // Call the base implementation.
+ this->MCAsmParserExtension::Initialize(Parser);
+
+ // Debugging directives.
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveFile>(".file");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLine>(".line");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLoc>(".loc");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveStabs>(".stabs");
+
+ // CFI directives.
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFISections>(
+ ".cfi_sections");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIStartProc>(
+ ".cfi_startproc");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIEndProc>(
+ ".cfi_endproc");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfa>(
+ ".cfi_def_cfa");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaOffset>(
+ ".cfi_def_cfa_offset");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset>(
+ ".cfi_adjust_cfa_offset");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaRegister>(
+ ".cfi_def_cfa_register");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIOffset>(
+ ".cfi_offset");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIRelOffset>(
+ ".cfi_rel_offset");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_personality");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_lsda");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIRememberState>(".cfi_remember_state");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIRestoreState>(".cfi_restore_state");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFISameValue>(".cfi_same_value");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIRestore>(".cfi_restore");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIEscape>(".cfi_escape");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFISignalFrame>(".cfi_signal_frame");
+
+ // Macro directives.
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
+ ".macros_on");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
+ ".macros_off");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacro>(".macro");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endm");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endmacro");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectivePurgeMacro>(".purgem");
+
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".sleb128");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".uleb128");
+ }
+
+ bool ParseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
+
+ bool ParseDirectiveFile(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveStabs(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISections(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIStartProc(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIDefCfa(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIDefCfaOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIAdjustCfaOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIDefCfaRegister(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRelOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIPersonalityOrLsda(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRememberState(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRestoreState(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISameValue(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRestore(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIEscape(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISignalFrame(StringRef, SMLoc DirectiveLoc);
+
+ bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveEndMacro(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectivePurgeMacro(StringRef, SMLoc DirectiveLoc);
+
+ bool ParseDirectiveLEB128(StringRef, SMLoc);
+};
+
+}
+
+namespace llvm {
+
+extern MCAsmParserExtension *createDarwinAsmParser();
+extern MCAsmParserExtension *createELFAsmParser();
+extern MCAsmParserExtension *createCOFFAsmParser();
+
+}
+
+enum { DEFAULT_ADDRSPACE = 0 };
+
+AsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx,
+ MCStreamer &_Out, const MCAsmInfo &_MAI)
+ : Lexer(_MAI), Ctx(_Ctx), Out(_Out), MAI(_MAI), SrcMgr(_SM),
+ GenericParser(new GenericAsmParser), PlatformParser(0),
+ CurBuffer(0), MacrosEnabled(true), CppHashLineNumber(0),
+ AssemblerDialect(~0U) {
+ // Save the old handler.
+ SavedDiagHandler = SrcMgr.getDiagHandler();
+ SavedDiagContext = SrcMgr.getDiagContext();
+ // Set our own handler which calls the saved handler.
+ SrcMgr.setDiagHandler(DiagHandler, this);
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+
+ // Initialize the generic parser.
+ 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.hasMicrosoftFastStdCallMangling()) {
+ PlatformParser = createCOFFAsmParser();
+ PlatformParser->Initialize(*this);
+ } else if (_MAI.hasSubsectionsViaSymbols()) {
+ PlatformParser = createDarwinAsmParser();
+ PlatformParser->Initialize(*this);
+ } else {
+ PlatformParser = createELFAsmParser();
+ PlatformParser->Initialize(*this);
+ }
+}
+
+AsmParser::~AsmParser() {
+ assert(ActiveMacros.empty() && "Unexpected active macro instantiation!");
+
+ // Destroy any macros.
+ for (StringMap<Macro*>::iterator it = MacroMap.begin(),
+ ie = MacroMap.end(); it != ie; ++it)
+ delete it->getValue();
+
+ delete PlatformParser;
+ delete GenericParser;
+}
+
+void AsmParser::PrintMacroInstantiations() {
+ // Print the active macro instantiation stack.
+ for (std::vector<MacroInstantiation*>::const_reverse_iterator
+ it = ActiveMacros.rbegin(), ie = ActiveMacros.rend(); it != ie; ++it)
+ PrintMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
+ "while in macro instantiation");
+}
+
+bool AsmParser::Warning(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ if (FatalAssemblerWarnings)
+ return Error(L, Msg, Ranges);
+ PrintMessage(L, SourceMgr::DK_Warning, Msg, Ranges);
+ PrintMacroInstantiations();
+ return false;
+}
+
+bool AsmParser::Error(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ HadError = true;
+ PrintMessage(L, SourceMgr::DK_Error, Msg, Ranges);
+ PrintMacroInstantiations();
+ return true;
+}
+
+bool AsmParser::EnterIncludeFile(const std::string &Filename) {
+ std::string IncludedFile;
+ int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
+ if (NewBuf == -1)
+ return true;
+
+ CurBuffer = NewBuf;
+
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+
+ return false;
+}
+
+/// Process the specified .incbin file by seaching for it in the include paths
+/// then just emitting the byte contents of the file to the streamer. This
+/// returns true on failure.
+bool AsmParser::ProcessIncbinFile(const std::string &Filename) {
+ std::string IncludedFile;
+ int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
+ if (NewBuf == -1)
+ return true;
+
+ // Pick up the bytes from the file and emit them.
+ getStreamer().EmitBytes(SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(),
+ DEFAULT_ADDRSPACE);
+ return false;
+}
+
+void AsmParser::JumpToLoc(SMLoc Loc) {
+ CurBuffer = SrcMgr.FindBufferContainingLoc(Loc);
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer), Loc.getPointer());
+}
+
+const AsmToken &AsmParser::Lex() {
+ const AsmToken *tok = &Lexer.Lex();
+
+ if (tok->is(AsmToken::Eof)) {
+ // If this is the end of an included file, pop the parent file off the
+ // include stack.
+ SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
+ if (ParentIncludeLoc != SMLoc()) {
+ JumpToLoc(ParentIncludeLoc);
+ tok = &Lexer.Lex();
+ }
+ }
+
+ if (tok->is(AsmToken::Error))
+ Error(Lexer.getErrLoc(), Lexer.getErr());
+
+ return *tok;
+}
+
+bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
+ // Create the initial section, if requested.
+ if (!NoInitialTextSection)
+ Out.InitSections();
+
+ // Prime the lexer.
+ Lex();
+
+ HadError = false;
+ AsmCond StartingCondState = TheCondState;
+
+ // If we are generating dwarf for assembly source files save the initial text
+ // section and generate a .file directive.
+ if (getContext().getGenDwarfForAssembly()) {
+ getContext().setGenDwarfSection(getStreamer().getCurrentSection());
+ MCSymbol *SectionStartSym = getContext().CreateTempSymbol();
+ getStreamer().EmitLabel(SectionStartSym);
+ getContext().setGenDwarfSectionStartSym(SectionStartSym);
+ getStreamer().EmitDwarfFileDirective(getContext().nextGenDwarfFileNumber(),
+ StringRef(), SrcMgr.getMemoryBuffer(CurBuffer)->getBufferIdentifier());
+ }
+
+ // While we have input, parse each statement.
+ while (Lexer.isNot(AsmToken::Eof)) {
+ if (!ParseStatement()) continue;
+
+ // We had an error, validate that one was emitted and recover by skipping to
+ // the next line.
+ assert(HadError && "Parse statement returned an error, but none emitted!");
+ EatToEndOfStatement();
+ }
+
+ if (TheCondState.TheCond != StartingCondState.TheCond ||
+ TheCondState.Ignore != StartingCondState.Ignore)
+ return TokError("unmatched .ifs or .elses");
+
+ // Check to see there are no empty DwarfFile slots.
+ const std::vector<MCDwarfFile *> &MCDwarfFiles =
+ getContext().getMCDwarfFiles();
+ for (unsigned i = 1; i < MCDwarfFiles.size(); i++) {
+ if (!MCDwarfFiles[i])
+ TokError("unassigned file number: " + Twine(i) + " for .file directives");
+ }
+
+ // Check to see that all assembler local symbols were actually defined.
+ // Targets that don't do subsections via symbols may not want this, though,
+ // so conservatively exclude them. Only do this if we're finalizing, though,
+ // as otherwise we won't necessarilly have seen everything yet.
+ if (!NoFinalize && MAI.hasSubsectionsViaSymbols()) {
+ const MCContext::SymbolTable &Symbols = getContext().getSymbols();
+ for (MCContext::SymbolTable::const_iterator i = Symbols.begin(),
+ e = Symbols.end();
+ i != e; ++i) {
+ MCSymbol *Sym = i->getValue();
+ // Variable symbols may not be marked as defined, so check those
+ // explicitly. If we know it's a variable, we have a definition for
+ // the purposes of this check.
+ if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
+ // FIXME: We would really like to refer back to where the symbol was
+ // first referenced for a source location. We need to add something
+ // to track that. Currently, we just point to the end of the file.
+ PrintMessage(getLexer().getLoc(), SourceMgr::DK_Error,
+ "assembler local symbol '" + Sym->getName() +
+ "' not defined");
+ }
+ }
+
+
+ // Finalize the output stream if there are no errors and if the client wants
+ // us to.
+ if (!HadError && !NoFinalize)
+ Out.Finish();
+
+ return HadError;
+}
+
+void AsmParser::CheckForValidSection() {
+ if (!getStreamer().getCurrentSection()) {
+ TokError("expected section directive before assembly directive");
+ Out.SwitchSection(Ctx.getMachOSection(
+ "__TEXT", "__text",
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 0, SectionKind::getText()));
+ }
+}
+
+/// EatToEndOfStatement - Throw away the rest of the line for testing purposes.
+void AsmParser::EatToEndOfStatement() {
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ // Eat EOL.
+ if (Lexer.is(AsmToken::EndOfStatement))
+ Lex();
+}
+
+StringRef AsmParser::ParseStringToEndOfStatement() {
+ const char *Start = getTok().getLoc().getPointer();
+
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ const char *End = getTok().getLoc().getPointer();
+ return StringRef(Start, End - Start);
+}
+
+StringRef AsmParser::ParseStringToComma() {
+ const char *Start = getTok().getLoc().getPointer();
+
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Comma) &&
+ Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ const char *End = getTok().getLoc().getPointer();
+ return StringRef(Start, End - Start);
+}
+
+/// ParseParenExpr - Parse a paren expression and return it.
+/// NOTE: This assumes the leading '(' has already been consumed.
+///
+/// parenexpr ::= expr)
+///
+bool AsmParser::ParseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
+ if (ParseExpression(Res)) return true;
+ if (Lexer.isNot(AsmToken::RParen))
+ return TokError("expected ')' in parentheses expression");
+ EndLoc = Lexer.getLoc();
+ Lex();
+ return false;
+}
+
+/// ParseBracketExpr - Parse a bracket expression and return it.
+/// NOTE: This assumes the leading '[' has already been consumed.
+///
+/// bracketexpr ::= expr]
+///
+bool AsmParser::ParseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
+ if (ParseExpression(Res)) return true;
+ if (Lexer.isNot(AsmToken::RBrac))
+ return TokError("expected ']' in brackets expression");
+ EndLoc = Lexer.getLoc();
+ Lex();
+ return false;
+}
+
+/// ParsePrimaryExpr - Parse a primary expression and return it.
+/// primaryexpr ::= (parenexpr
+/// primaryexpr ::= symbol
+/// primaryexpr ::= number
+/// primaryexpr ::= '.'
+/// primaryexpr ::= ~,+,- primaryexpr
+bool AsmParser::ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
+ switch (Lexer.getKind()) {
+ default:
+ return TokError("unknown token in expression");
+ // If we have an error assume that we've already handled it.
+ case AsmToken::Error:
+ return true;
+ case AsmToken::Exclaim:
+ Lex(); // Eat the operator.
+ if (ParsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::CreateLNot(Res, getContext());
+ return false;
+ case AsmToken::Dollar:
+ case AsmToken::String:
+ case AsmToken::Identifier: {
+ EndLoc = Lexer.getLoc();
+
+ StringRef Identifier;
+ if (ParseIdentifier(Identifier))
+ return true;
+
+ // This is a symbol reference.
+ std::pair<StringRef, StringRef> Split = Identifier.split('@');
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Split.first);
+
+ // Lookup the symbol variant if used.
+ MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+ if (Split.first.size() != Identifier.size()) {
+ Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
+ if (Variant == MCSymbolRefExpr::VK_Invalid) {
+ Variant = MCSymbolRefExpr::VK_None;
+ return TokError("invalid variant '" + Split.second + "'");
+ }
+ }
+
+ // If this is an absolute variable reference, substitute it now to preserve
+ // semantics in the face of reassignment.
+ if (Sym->isVariable() && isa<MCConstantExpr>(Sym->getVariableValue())) {
+ if (Variant)
+ return Error(EndLoc, "unexpected modifier on variable reference");
+
+ Res = Sym->getVariableValue();
+ return false;
+ }
+
+ // Otherwise create a symbol ref.
+ Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
+ return false;
+ }
+ 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::Real: {
+ APFloat RealVal(APFloat::IEEEdouble, getTok().getString());
+ uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
+ Res = MCConstantExpr::Create(IntVal, getContext());
+ Lex(); // Eat token.
+ return false;
+ }
+ case AsmToken::Dot: {
+ // This is a '.' reference, which references the current PC. Emit a
+ // temporary label to the streamer and refer to it.
+ MCSymbol *Sym = Ctx.CreateTempSymbol();
+ Out.EmitLabel(Sym);
+ Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None, getContext());
+ EndLoc = Lexer.getLoc();
+ Lex(); // Eat identifier.
+ return false;
+ }
+ case AsmToken::LParen:
+ Lex(); // Eat the '('.
+ return ParseParenExpr(Res, EndLoc);
+ case AsmToken::LBrac:
+ if (!PlatformParser->HasBracketExpressions())
+ return TokError("brackets expression not supported on this target");
+ Lex(); // Eat the '['.
+ return ParseBracketExpr(Res, EndLoc);
+ case AsmToken::Minus:
+ Lex(); // Eat the operator.
+ if (ParsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::CreateMinus(Res, getContext());
+ return false;
+ case AsmToken::Plus:
+ Lex(); // Eat the operator.
+ if (ParsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::CreatePlus(Res, getContext());
+ return false;
+ case AsmToken::Tilde:
+ Lex(); // Eat the operator.
+ if (ParsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::CreateNot(Res, getContext());
+ return false;
+ }
+}
+
+bool AsmParser::ParseExpression(const MCExpr *&Res) {
+ SMLoc EndLoc;
+ return ParseExpression(Res, EndLoc);
+}
+
+const MCExpr *
+AsmParser::ApplyModifierToExpr(const MCExpr *E,
+ MCSymbolRefExpr::VariantKind Variant) {
+ // Recurse over the given expression, rebuilding it to apply the given variant
+ // if there is exactly one symbol.
+ switch (E->getKind()) {
+ case MCExpr::Target:
+ case MCExpr::Constant:
+ return 0;
+
+ case MCExpr::SymbolRef: {
+ const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
+
+ if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
+ TokError("invalid variant on expression '" +
+ getTok().getIdentifier() + "' (already modified)");
+ return E;
+ }
+
+ return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
+ }
+
+ case MCExpr::Unary: {
+ const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
+ const MCExpr *Sub = ApplyModifierToExpr(UE->getSubExpr(), Variant);
+ if (!Sub)
+ return 0;
+ return MCUnaryExpr::Create(UE->getOpcode(), Sub, getContext());
+ }
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
+ const MCExpr *LHS = ApplyModifierToExpr(BE->getLHS(), Variant);
+ const MCExpr *RHS = ApplyModifierToExpr(BE->getRHS(), Variant);
+
+ if (!LHS && !RHS)
+ return 0;
+
+ if (!LHS) LHS = BE->getLHS();
+ if (!RHS) RHS = BE->getRHS();
+
+ return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
+ }
+ }
+
+ llvm_unreachable("Invalid expression kind!");
+}
+
+/// ParseExpression - Parse an expression and return it.
+///
+/// expr ::= expr &&,|| expr -> lowest.
+/// expr ::= expr |,^,&,! expr
+/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
+/// expr ::= expr <<,>> expr
+/// expr ::= expr +,- expr
+/// expr ::= expr *,/,% expr -> highest.
+/// expr ::= primaryexpr
+///
+bool AsmParser::ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
+ // Parse the expression.
+ Res = 0;
+ if (ParsePrimaryExpr(Res, EndLoc) || ParseBinOpRHS(1, Res, EndLoc))
+ return true;
+
+ // As a special case, we support 'a op b @ modifier' by rewriting the
+ // expression to include the modifier. This is inefficient, but in general we
+ // expect users to use 'a@modifier op b'.
+ if (Lexer.getKind() == AsmToken::At) {
+ Lex();
+
+ if (Lexer.isNot(AsmToken::Identifier))
+ return TokError("unexpected symbol modifier following '@'");
+
+ MCSymbolRefExpr::VariantKind Variant =
+ MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
+ if (Variant == MCSymbolRefExpr::VK_Invalid)
+ return TokError("invalid variant '" + getTok().getIdentifier() + "'");
+
+ const MCExpr *ModifiedRes = ApplyModifierToExpr(Res, Variant);
+ if (!ModifiedRes) {
+ return TokError("invalid modifier '" + getTok().getIdentifier() +
+ "' (no symbols present)");
+ }
+
+ Res = ModifiedRes;
+ Lex();
+ }
+
+ // Try to constant fold it up front, if possible.
+ int64_t Value;
+ if (Res->EvaluateAsAbsolute(Value))
+ Res = MCConstantExpr::Create(Value, getContext());
+
+ return false;
+}
+
+bool AsmParser::ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
+ Res = 0;
+ return ParseParenExpr(Res, EndLoc) ||
+ ParseBinOpRHS(1, Res, EndLoc);
+}
+
+bool AsmParser::ParseAbsoluteExpression(int64_t &Res) {
+ const MCExpr *Expr;
+
+ SMLoc StartLoc = Lexer.getLoc();
+ if (ParseExpression(Expr))
+ return true;
+
+ if (!Expr->EvaluateAsAbsolute(Res))
+ return Error(StartLoc, "expected absolute expression");
+
+ return false;
+}
+
+static unsigned getBinOpPrecedence(AsmToken::TokenKind K,
+ MCBinaryExpr::Opcode &Kind) {
+ switch (K) {
+ default:
+ return 0; // not a binop.
+
+ // Lowest Precedence: &&, ||
+ case AsmToken::AmpAmp:
+ Kind = MCBinaryExpr::LAnd;
+ return 1;
+ case AsmToken::PipePipe:
+ Kind = MCBinaryExpr::LOr;
+ return 1;
+
+
+ // Low Precedence: |, &, ^
+ //
+ // FIXME: gas seems to support '!' as an infix operator?
+ case AsmToken::Pipe:
+ Kind = MCBinaryExpr::Or;
+ return 2;
+ case AsmToken::Caret:
+ Kind = MCBinaryExpr::Xor;
+ return 2;
+ case AsmToken::Amp:
+ Kind = MCBinaryExpr::And;
+ return 2;
+
+ // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
+ case AsmToken::EqualEqual:
+ Kind = MCBinaryExpr::EQ;
+ return 3;
+ case AsmToken::ExclaimEqual:
+ case AsmToken::LessGreater:
+ Kind = MCBinaryExpr::NE;
+ return 3;
+ case AsmToken::Less:
+ Kind = MCBinaryExpr::LT;
+ return 3;
+ case AsmToken::LessEqual:
+ Kind = MCBinaryExpr::LTE;
+ return 3;
+ case AsmToken::Greater:
+ Kind = MCBinaryExpr::GT;
+ return 3;
+ case AsmToken::GreaterEqual:
+ Kind = MCBinaryExpr::GTE;
+ return 3;
+
+ // Intermediate Precedence: <<, >>
+ case AsmToken::LessLess:
+ Kind = MCBinaryExpr::Shl;
+ return 4;
+ case AsmToken::GreaterGreater:
+ Kind = MCBinaryExpr::Shr;
+ return 4;
+
+ // High Intermediate Precedence: +, -
+ case AsmToken::Plus:
+ Kind = MCBinaryExpr::Add;
+ return 5;
+ case AsmToken::Minus:
+ Kind = MCBinaryExpr::Sub;
+ return 5;
+
+ // Highest Precedence: *, /, %
+ case AsmToken::Star:
+ Kind = MCBinaryExpr::Mul;
+ return 6;
+ case AsmToken::Slash:
+ Kind = MCBinaryExpr::Div;
+ return 6;
+ case AsmToken::Percent:
+ Kind = MCBinaryExpr::Mod;
+ return 6;
+ }
+}
+
+
+/// ParseBinOpRHS - Parse all binary operators with precedence >= 'Precedence'.
+/// Res contains the LHS of the expression on input.
+bool AsmParser::ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
+ SMLoc &EndLoc) {
+ while (1) {
+ MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
+ unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
+
+ // If the next token is lower precedence than we are allowed to eat, return
+ // successfully with what we ate already.
+ if (TokPrec < Precedence)
+ return false;
+
+ Lex();
+
+ // Eat the next primary expression.
+ const MCExpr *RHS;
+ if (ParsePrimaryExpr(RHS, EndLoc)) return true;
+
+ // If BinOp binds less tightly with RHS than the operator after RHS, let
+ // the pending operator take RHS as its LHS.
+ MCBinaryExpr::Opcode Dummy;
+ unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
+ if (TokPrec < NextTokPrec) {
+ if (ParseBinOpRHS(Precedence+1, RHS, EndLoc)) return true;
+ }
+
+ // Merge LHS and RHS according to operator.
+ Res = MCBinaryExpr::Create(Kind, Res, RHS, getContext());
+ }
+}
+
+
+
+
+/// ParseStatement:
+/// ::= EndOfStatement
+/// ::= Label* Directive ...Operands... EndOfStatement
+/// ::= Label* Identifier OperandList* EndOfStatement
+bool AsmParser::ParseStatement() {
+ if (Lexer.is(AsmToken::EndOfStatement)) {
+ Out.AddBlankLine();
+ Lex();
+ return false;
+ }
+
+ // Statements always start with an identifier or are a full line comment.
+ AsmToken ID = getTok();
+ SMLoc IDLoc = ID.getLoc();
+ StringRef IDVal;
+ int64_t LocalLabelVal = -1;
+ // A full line comment is a '#' as the first token.
+ if (Lexer.is(AsmToken::Hash))
+ return ParseCppHashLineFilenameComment(IDLoc);
+
+ // Allow an integer followed by a ':' as a directional local label.
+ if (Lexer.is(AsmToken::Integer)) {
+ LocalLabelVal = getTok().getIntVal();
+ if (LocalLabelVal < 0) {
+ if (!TheCondState.Ignore)
+ return TokError("unexpected token at start of statement");
+ IDVal = "";
+ }
+ else {
+ IDVal = getTok().getString();
+ Lex(); // Consume the integer token to be used as an identifier token.
+ if (Lexer.getKind() != AsmToken::Colon) {
+ if (!TheCondState.Ignore)
+ return TokError("unexpected token at start of statement");
+ }
+ }
+
+ } else if (Lexer.is(AsmToken::Dot)) {
+ // Treat '.' as a valid identifier in this context.
+ Lex();
+ IDVal = ".";
+
+ } else if (ParseIdentifier(IDVal)) {
+ if (!TheCondState.Ignore)
+ return TokError("unexpected token at start of statement");
+ IDVal = "";
+ }
+
+
+ // Handle conditional assembly here before checking for skipping. We
+ // have to do this so that .endif isn't skipped in a ".if 0" block for
+ // example.
+ if (IDVal == ".if")
+ return ParseDirectiveIf(IDLoc);
+ if (IDVal == ".ifb")
+ return ParseDirectiveIfb(IDLoc, true);
+ if (IDVal == ".ifnb")
+ return ParseDirectiveIfb(IDLoc, false);
+ if (IDVal == ".ifc")
+ return ParseDirectiveIfc(IDLoc, true);
+ if (IDVal == ".ifnc")
+ return ParseDirectiveIfc(IDLoc, false);
+ if (IDVal == ".ifdef")
+ return ParseDirectiveIfdef(IDLoc, true);
+ if (IDVal == ".ifndef" || IDVal == ".ifnotdef")
+ return ParseDirectiveIfdef(IDLoc, false);
+ if (IDVal == ".elseif")
+ return ParseDirectiveElseIf(IDLoc);
+ if (IDVal == ".else")
+ return ParseDirectiveElse(IDLoc);
+ if (IDVal == ".endif")
+ return ParseDirectiveEndIf(IDLoc);
+
+ // If we are in a ".if 0" block, ignore this statement.
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ return false;
+ }
+
+ // FIXME: Recurse on local labels?
+
+ // See what kind of statement we have.
+ switch (Lexer.getKind()) {
+ case AsmToken::Colon: {
+ CheckForValidSection();
+
+ // identifier ':' -> Label.
+ Lex();
+
+ // Diagnose attempt to use '.' as a label.
+ if (IDVal == ".")
+ return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
+
+ // Diagnose attempt to use a variable as a label.
+ //
+ // FIXME: Diagnostics. Note the location of the definition as a label.
+ // FIXME: This doesn't diagnose assignment to a symbol which has been
+ // implicitly marked as external.
+ MCSymbol *Sym;
+ if (LocalLabelVal == -1)
+ Sym = getContext().GetOrCreateSymbol(IDVal);
+ else
+ Sym = Ctx.CreateDirectionalLocalSymbol(LocalLabelVal);
+ if (!Sym->isUndefined() || Sym->isVariable())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ // Emit the label.
+ Out.EmitLabel(Sym);
+
+ // If we are generating dwarf for assembly source files then gather the
+ // info to make a dwarf label entry for this label if needed.
+ if (getContext().getGenDwarfForAssembly())
+ MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
+ IDLoc);
+
+ // Consume any end of statement token, if present, to avoid spurious
+ // AddBlankLine calls().
+ if (Lexer.is(AsmToken::EndOfStatement)) {
+ Lex();
+ if (Lexer.is(AsmToken::Eof))
+ return false;
+ }
+
+ return ParseStatement();
+ }
+
+ case AsmToken::Equal:
+ // identifier '=' ... -> assignment statement
+ Lex();
+
+ return ParseAssignment(IDVal, true);
+
+ default: // Normal instruction or directive.
+ break;
+ }
+
+ // If macros are enabled, check to see if this is a macro instantiation.
+ if (MacrosEnabled)
+ if (const Macro *M = MacroMap.lookup(IDVal))
+ return HandleMacroEntry(IDVal, IDLoc, M);
+
+ // Otherwise, we have a normal instruction or directive.
+ if (IDVal[0] == '.' && IDVal != ".") {
+
+ // Target hook for parsing target specific directives.
+ if (!getTargetParser().ParseDirective(ID))
+ return false;
+
+ // Assembler features
+ if (IDVal == ".set" || IDVal == ".equ")
+ return ParseDirectiveSet(IDVal, true);
+ if (IDVal == ".equiv")
+ return ParseDirectiveSet(IDVal, false);
+
+ // Data directives
+
+ if (IDVal == ".ascii")
+ return ParseDirectiveAscii(IDVal, false);
+ if (IDVal == ".asciz" || IDVal == ".string")
+ return ParseDirectiveAscii(IDVal, true);
+
+ if (IDVal == ".byte")
+ return ParseDirectiveValue(1);
+ if (IDVal == ".short")
+ return ParseDirectiveValue(2);
+ if (IDVal == ".value")
+ return ParseDirectiveValue(2);
+ if (IDVal == ".2byte")
+ return ParseDirectiveValue(2);
+ if (IDVal == ".long")
+ return ParseDirectiveValue(4);
+ if (IDVal == ".int")
+ return ParseDirectiveValue(4);
+ if (IDVal == ".4byte")
+ return ParseDirectiveValue(4);
+ if (IDVal == ".quad")
+ return ParseDirectiveValue(8);
+ if (IDVal == ".8byte")
+ return ParseDirectiveValue(8);
+ if (IDVal == ".single" || IDVal == ".float")
+ return ParseDirectiveRealValue(APFloat::IEEEsingle);
+ if (IDVal == ".double")
+ return ParseDirectiveRealValue(APFloat::IEEEdouble);
+
+ if (IDVal == ".align") {
+ bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes();
+ return ParseDirectiveAlign(IsPow2, /*ExprSize=*/1);
+ }
+ if (IDVal == ".align32") {
+ bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes();
+ return ParseDirectiveAlign(IsPow2, /*ExprSize=*/4);
+ }
+ if (IDVal == ".balign")
+ return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
+ if (IDVal == ".balignw")
+ return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
+ if (IDVal == ".balignl")
+ return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
+ if (IDVal == ".p2align")
+ return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
+ if (IDVal == ".p2alignw")
+ return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
+ if (IDVal == ".p2alignl")
+ return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
+
+ if (IDVal == ".org")
+ return ParseDirectiveOrg();
+
+ if (IDVal == ".fill")
+ return ParseDirectiveFill();
+ if (IDVal == ".space" || IDVal == ".skip")
+ return ParseDirectiveSpace();
+ if (IDVal == ".zero")
+ return ParseDirectiveZero();
+
+ // Symbol attribute directives
+
+ if (IDVal == ".extern") {
+ EatToEndOfStatement(); // .extern is the default, ignore it.
+ return false;
+ }
+ if (IDVal == ".globl" || IDVal == ".global")
+ return ParseDirectiveSymbolAttribute(MCSA_Global);
+ if (IDVal == ".indirect_symbol")
+ return ParseDirectiveSymbolAttribute(MCSA_IndirectSymbol);
+ if (IDVal == ".lazy_reference")
+ return ParseDirectiveSymbolAttribute(MCSA_LazyReference);
+ if (IDVal == ".no_dead_strip")
+ return ParseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
+ if (IDVal == ".symbol_resolver")
+ return ParseDirectiveSymbolAttribute(MCSA_SymbolResolver);
+ if (IDVal == ".private_extern")
+ return ParseDirectiveSymbolAttribute(MCSA_PrivateExtern);
+ if (IDVal == ".reference")
+ return ParseDirectiveSymbolAttribute(MCSA_Reference);
+ 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" || IDVal == ".common")
+ return ParseDirectiveComm(/*IsLocal=*/false);
+ if (IDVal == ".lcomm")
+ return ParseDirectiveComm(/*IsLocal=*/true);
+
+ if (IDVal == ".abort")
+ return ParseDirectiveAbort();
+ if (IDVal == ".include")
+ return ParseDirectiveInclude();
+ if (IDVal == ".incbin")
+ return ParseDirectiveIncbin();
+
+ if (IDVal == ".code16" || IDVal == ".code16gcc")
+ return TokError(Twine(IDVal) + " not supported yet");
+
+ // Macro-like directives
+ if (IDVal == ".rept")
+ return ParseDirectiveRept(IDLoc);
+ if (IDVal == ".irp")
+ return ParseDirectiveIrp(IDLoc);
+ if (IDVal == ".irpc")
+ return ParseDirectiveIrpc(IDLoc);
+ if (IDVal == ".endr")
+ return ParseDirectiveEndr(IDLoc);
+
+ // Look up the handler in the handler table.
+ std::pair<MCAsmParserExtension*, DirectiveHandler> Handler =
+ DirectiveMap.lookup(IDVal);
+ if (Handler.first)
+ return (*Handler.second)(Handler.first, IDVal, IDLoc);
+
+
+ return Error(IDLoc, "unknown directive");
+ }
+
+ CheckForValidSection();
+
+ // Canonicalize the opcode to lower case.
+ SmallString<128> Opcode;
+ for (unsigned i = 0, e = IDVal.size(); i != e; ++i)
+ Opcode.push_back(tolower(IDVal[i]));
+
+ SmallVector<MCParsedAsmOperand*, 8> ParsedOperands;
+ bool HadError = getTargetParser().ParseInstruction(Opcode.str(), IDLoc,
+ ParsedOperands);
+
+ // Dump the parsed representation, if requested.
+ if (getShowParsedOperands()) {
+ SmallString<256> Str;
+ raw_svector_ostream OS(Str);
+ OS << "parsed instruction: [";
+ for (unsigned i = 0; i != ParsedOperands.size(); ++i) {
+ if (i != 0)
+ OS << ", ";
+ ParsedOperands[i]->print(OS);
+ }
+ OS << "]";
+
+ PrintMessage(IDLoc, SourceMgr::DK_Note, OS.str());
+ }
+
+ // If we are generating dwarf for assembly source files and the current
+ // section is the initial text section then generate a .loc directive for
+ // the instruction.
+ if (!HadError && getContext().getGenDwarfForAssembly() &&
+ getContext().getGenDwarfSection() == getStreamer().getCurrentSection() ) {
+ getStreamer().EmitDwarfLocDirective(getContext().getGenDwarfFileNumber(),
+ SrcMgr.FindLineNumber(IDLoc, CurBuffer),
+ 0, DWARF2_LINE_DEFAULT_IS_STMT ?
+ DWARF2_FLAG_IS_STMT : 0, 0, 0,
+ StringRef());
+ }
+
+ // If parsing succeeded, match the instruction.
+ if (!HadError)
+ HadError = getTargetParser().MatchAndEmitInstruction(IDLoc, ParsedOperands,
+ Out);
+
+ // Free any parsed operands.
+ for (unsigned i = 0, e = ParsedOperands.size(); i != e; ++i)
+ delete ParsedOperands[i];
+
+ // Don't skip the rest of the line, the instruction parser is responsible for
+ // that.
+ return false;
+}
+
+/// EatToEndOfLine uses the Lexer to eat the characters to the end of the line
+/// since they may not be able to be tokenized to get to the end of line token.
+void AsmParser::EatToEndOfLine() {
+ if (!Lexer.is(AsmToken::EndOfStatement))
+ Lexer.LexUntilEndOfLine();
+ // Eat EOL.
+ Lex();
+}
+
+/// ParseCppHashLineFilenameComment as this:
+/// ::= # number "filename"
+/// or just as a full line comment if it doesn't have a number and a string.
+bool AsmParser::ParseCppHashLineFilenameComment(const SMLoc &L) {
+ Lex(); // Eat the hash token.
+
+ if (getLexer().isNot(AsmToken::Integer)) {
+ // Consume the line since in cases it is not a well-formed line directive,
+ // as if were simply a full line comment.
+ EatToEndOfLine();
+ return false;
+ }
+
+ int64_t LineNumber = getTok().getIntVal();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::String)) {
+ EatToEndOfLine();
+ return false;
+ }
+
+ StringRef Filename = getTok().getString();
+ // Get rid of the enclosing quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
+
+ // Save the SMLoc, Filename and LineNumber for later use by diagnostics.
+ CppHashLoc = L;
+ CppHashFilename = Filename;
+ CppHashLineNumber = LineNumber;
+
+ // Ignore any trailing characters, they're just comment.
+ EatToEndOfLine();
+ return false;
+}
+
+/// DiagHandler - will use the last parsed cpp hash line filename comment
+/// for the Filename and LineNo if any in the diagnostic.
+void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
+ const AsmParser *Parser = static_cast<const AsmParser*>(Context);
+ raw_ostream &OS = errs();
+
+ const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
+ const SMLoc &DiagLoc = Diag.getLoc();
+ int DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
+ int CppHashBuf = Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashLoc);
+
+ // Like SourceMgr::PrintMessage() we need to print the include stack if any
+ // before printing the message.
+ int DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
+ if (!Parser->SavedDiagHandler && DiagCurBuffer > 0) {
+ SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
+ DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
+ }
+
+ // If we have not parsed a cpp hash line filename comment or the source
+ // manager changed or buffer changed (like in a nested include) then just
+ // print the normal diagnostic using its Filename and LineNo.
+ if (!Parser->CppHashLineNumber ||
+ &DiagSrcMgr != &Parser->SrcMgr ||
+ DiagBuf != CppHashBuf) {
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
+ else
+ Diag.print(0, OS);
+ return;
+ }
+
+ // Use the CppHashFilename and calculate a line number based on the
+ // CppHashLoc and CppHashLineNumber relative to this Diag's SMLoc for
+ // the diagnostic.
+ const std::string Filename = Parser->CppHashFilename;
+
+ int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
+ int CppHashLocLineNo =
+ Parser->SrcMgr.FindLineNumber(Parser->CppHashLoc, CppHashBuf);
+ int LineNo = Parser->CppHashLineNumber - 1 +
+ (DiagLocLineNo - CppHashLocLineNo);
+
+ SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(),
+ Filename, LineNo, Diag.getColumnNo(),
+ Diag.getKind(), Diag.getMessage(),
+ Diag.getLineContents(), Diag.getRanges());
+
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
+ else
+ NewDiag.print(0, OS);
+}
+
+bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
+ const MacroParameters &Parameters,
+ const MacroArguments &A,
+ const SMLoc &L) {
+ unsigned NParameters = Parameters.size();
+ if (NParameters != 0 && NParameters != A.size())
+ return Error(L, "Wrong number of arguments");
+
+ while (!Body.empty()) {
+ // Scan for the next substitution.
+ std::size_t End = Body.size(), Pos = 0;
+ for (; Pos != End; ++Pos) {
+ // Check for a substitution or escape.
+ if (!NParameters) {
+ // This macro has no parameters, look for $0, $1, etc.
+ if (Body[Pos] != '$' || Pos + 1 == End)
+ continue;
+
+ char Next = Body[Pos + 1];
+ if (Next == '$' || Next == 'n' || isdigit(Next))
+ break;
+ } else {
+ // This macro has parameters, look for \foo, \bar, etc.
+ if (Body[Pos] == '\\' && Pos + 1 != End)
+ break;
+ }
+ }
+
+ // Add the prefix.
+ OS << Body.slice(0, Pos);
+
+ // Check if we reached the end.
+ if (Pos == End)
+ break;
+
+ if (!NParameters) {
+ switch (Body[Pos+1]) {
+ // $$ => $
+ case '$':
+ OS << '$';
+ break;
+
+ // $n => number of arguments
+ case 'n':
+ OS << A.size();
+ break;
+
+ // $[0-9] => argument
+ default: {
+ // Missing arguments are ignored.
+ unsigned Index = Body[Pos+1] - '0';
+ if (Index >= A.size())
+ break;
+
+ // Otherwise substitute with the token values, with spaces eliminated.
+ for (MacroArgument::const_iterator it = A[Index].begin(),
+ ie = A[Index].end(); it != ie; ++it)
+ OS << it->getString();
+ break;
+ }
+ }
+ Pos += 2;
+ } else {
+ unsigned I = Pos + 1;
+ while (isalnum(Body[I]) && I + 1 != End)
+ ++I;
+
+ const char *Begin = Body.data() + Pos +1;
+ StringRef Argument(Begin, I - (Pos +1));
+ unsigned Index = 0;
+ for (; Index < NParameters; ++Index)
+ if (Parameters[Index] == Argument)
+ break;
+
+ // FIXME: We should error at the macro definition.
+ if (Index == NParameters)
+ return Error(L, "Parameter not found");
+
+ for (MacroArgument::const_iterator it = A[Index].begin(),
+ ie = A[Index].end(); it != ie; ++it)
+ OS << it->getString();
+
+ Pos += 1 + Argument.size();
+ }
+ // Update the scan point.
+ Body = Body.substr(Pos);
+ }
+
+ return false;
+}
+
+MacroInstantiation::MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL,
+ MemoryBuffer *I)
+ : TheMacro(M), Instantiation(I), InstantiationLoc(IL), ExitLoc(EL)
+{
+}
+
+/// ParseMacroArgument - Extract AsmTokens for a macro argument.
+/// This is used for both default macro parameter values and the
+/// arguments in macro invocations
+bool AsmParser::ParseMacroArgument(MacroArgument &MA) {
+ unsigned ParenLevel = 0;
+
+ for (;;) {
+ SMLoc LastTokenLoc;
+
+ if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
+ return TokError("unexpected token in macro instantiation");
+
+ // HandleMacroEntry relies on not advancing the lexer here
+ // to be able to fill in the remaining default parameter values
+ if (Lexer.is(AsmToken::EndOfStatement))
+ break;
+ if (ParenLevel == 0 && Lexer.is(AsmToken::Comma))
+ break;
+
+ // Adjust the current parentheses level.
+ if (Lexer.is(AsmToken::LParen))
+ ++ParenLevel;
+ else if (Lexer.is(AsmToken::RParen) && ParenLevel)
+ --ParenLevel;
+
+ // Append the token to the current argument list.
+ MA.push_back(getTok());
+ Lex();
+ }
+ if (ParenLevel != 0)
+ return TokError("unbalanced parenthesises in macro argument");
+ return false;
+}
+
+// Parse the macro instantiation arguments.
+bool AsmParser::ParseMacroArguments(const Macro *M, MacroArguments &A) {
+ const unsigned NParameters = M ? M->Parameters.size() : 0;
+
+ // Parse two kinds of macro invocations:
+ // - macros defined without any parameters accept an arbitrary number of them
+ // - macros defined with parameters accept at most that many of them
+ for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
+ ++Parameter) {
+ MacroArgument MA;
+
+ if (ParseMacroArgument(MA))
+ return true;
+
+ A.push_back(MA);
+
+ if (Lexer.is(AsmToken::EndOfStatement))
+ return false;
+
+ if (Lexer.is(AsmToken::Comma))
+ Lex();
+ }
+ return TokError("Too many arguments");
+}
+
+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");
+
+ MacroArguments A;
+ if (ParseMacroArguments(M, A))
+ return true;
+
+ // Remove any trailing empty arguments. Do this after-the-fact as we have
+ // to keep empty arguments in the middle of the list or positionality
+ // gets off. e.g., "foo 1, , 2" vs. "foo 1, 2,"
+ while (!A.empty() && A.back().empty())
+ A.pop_back();
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ StringRef Body = M->Body;
+ raw_svector_ostream OS(Buf);
+
+ if (expandMacro(OS, Body, M->Parameters, A, getTok().getLoc()))
+ return true;
+
+ // We include the .endmacro in the buffer as our queue to exit the macro
+ // instantiation.
+ OS << ".endmacro\n";
+
+ MemoryBuffer *Instantiation =
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(M, NameLoc,
+ getTok().getLoc(),
+ Instantiation);
+ ActiveMacros.push_back(MI);
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+ Lex();
+
+ return false;
+}
+
+void AsmParser::HandleMacroExit() {
+ // Jump to the EndOfStatement we should return to, and consume it.
+ JumpToLoc(ActiveMacros.back()->ExitLoc);
+ Lex();
+
+ // Pop the instantiation entry.
+ delete ActiveMacros.back();
+ ActiveMacros.pop_back();
+}
+
+static bool IsUsedIn(const MCSymbol *Sym, const MCExpr *Value) {
+ switch (Value->getKind()) {
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = static_cast<const MCBinaryExpr*>(Value);
+ return IsUsedIn(Sym, BE->getLHS()) || IsUsedIn(Sym, BE->getRHS());
+ break;
+ }
+ case MCExpr::Target:
+ case MCExpr::Constant:
+ return false;
+ case MCExpr::SymbolRef: {
+ const MCSymbol &S = static_cast<const MCSymbolRefExpr*>(Value)->getSymbol();
+ if (S.isVariable())
+ return IsUsedIn(Sym, S.getVariableValue());
+ return &S == Sym;
+ }
+ case MCExpr::Unary:
+ return IsUsedIn(Sym, static_cast<const MCUnaryExpr*>(Value)->getSubExpr());
+ }
+
+ llvm_unreachable("Unknown expr kind!");
+}
+
+bool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) {
+ // FIXME: Use better location, we should use proper tokens.
+ SMLoc EqualLoc = Lexer.getLoc();
+
+ const MCExpr *Value;
+ if (ParseExpression(Value))
+ return true;
+
+ // Note: we don't count b as used in "a = b". This is to allow
+ // a = b
+ // b = c
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in assignment");
+
+ // Error on assignment to '.'.
+ if (Name == ".") {
+ return Error(EqualLoc, ("assignment to pseudo-symbol '.' is unsupported "
+ "(use '.space' or '.org').)"));
+ }
+
+ // Eat the end of statement marker.
+ Lex();
+
+ // Validate that the LHS is allowed to be a variable (either it has not been
+ // used as a symbol, or it is an absolute symbol).
+ MCSymbol *Sym = getContext().LookupSymbol(Name);
+ if (Sym) {
+ // Diagnose assignment to a label.
+ //
+ // FIXME: Diagnostics. Note the location of the definition as a label.
+ // FIXME: Diagnose assignment to protected identifier (e.g., register name).
+ if (IsUsedIn(Sym, Value))
+ return Error(EqualLoc, "Recursive use of '" + Name + "'");
+ else if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable())
+ ; // Allow redefinitions of undefined symbols only used in directives.
+ else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
+ ; // Allow redefinitions of variables that haven't yet been used.
+ else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
+ return Error(EqualLoc, "redefinition of '" + Name + "'");
+ else if (!Sym->isVariable())
+ return Error(EqualLoc, "invalid assignment to '" + Name + "'");
+ else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
+ return Error(EqualLoc, "invalid reassignment of non-absolute variable '" +
+ Name + "'");
+
+ // Don't count these checks as uses.
+ Sym->setUsed(false);
+ } else
+ Sym = getContext().GetOrCreateSymbol(Name);
+
+ // FIXME: Handle '.'.
+
+ // Do the assignment.
+ Out.EmitAssignment(Sym, Value);
+
+ return false;
+}
+
+/// ParseIdentifier:
+/// ::= identifier
+/// ::= string
+bool AsmParser::ParseIdentifier(StringRef &Res) {
+ // The assembler has relaxed rules for accepting identifiers, in particular we
+ // allow things like '.globl $foo', which would normally be separate
+ // tokens. At this level, we have already lexed so we cannot (currently)
+ // handle this as a context dependent token, instead we detect adjacent tokens
+ // and return the combined identifier.
+ if (Lexer.is(AsmToken::Dollar)) {
+ SMLoc DollarLoc = getLexer().getLoc();
+
+ // Consume the dollar sign, and check for a following identifier.
+ Lex();
+ if (Lexer.isNot(AsmToken::Identifier))
+ return true;
+
+ // We have a '$' followed by an identifier, make sure they are adjacent.
+ if (DollarLoc.getPointer() + 1 != getTok().getLoc().getPointer())
+ return true;
+
+ // Construct the joined identifier and consume the token.
+ Res = StringRef(DollarLoc.getPointer(),
+ getTok().getIdentifier().size() + 1);
+ Lex();
+ return false;
+ }
+
+ if (Lexer.isNot(AsmToken::Identifier) &&
+ Lexer.isNot(AsmToken::String))
+ return true;
+
+ Res = getTok().getIdentifier();
+
+ Lex(); // Consume the identifier token.
+
+ return false;
+}
+
+/// ParseDirectiveSet:
+/// ::= .equ identifier ',' expression
+/// ::= .equiv identifier ',' expression
+/// ::= .set identifier ',' expression
+bool AsmParser::ParseDirectiveSet(StringRef IDVal, bool allow_redef) {
+ StringRef Name;
+
+ if (ParseIdentifier(Name))
+ return TokError("expected identifier after '" + Twine(IDVal) + "'");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '" + Twine(IDVal) + "'");
+ Lex();
+
+ return ParseAssignment(Name, allow_redef);
+}
+
+bool AsmParser::ParseEscapedString(std::string &Data) {
+ assert(getLexer().is(AsmToken::String) && "Unexpected current token!");
+
+ Data = "";
+ StringRef Str = getTok().getStringContents();
+ for (unsigned i = 0, e = Str.size(); i != e; ++i) {
+ if (Str[i] != '\\') {
+ Data += Str[i];
+ continue;
+ }
+
+ // Recognize escaped characters. Note that this escape semantics currently
+ // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes.
+ ++i;
+ if (i == e)
+ return TokError("unexpected backslash at end of string");
+
+ // Recognize octal sequences.
+ if ((unsigned) (Str[i] - '0') <= 7) {
+ // Consume up to three octal characters.
+ unsigned Value = Str[i] - '0';
+
+ if (i + 1 != e && ((unsigned) (Str[i + 1] - '0')) <= 7) {
+ ++i;
+ Value = Value * 8 + (Str[i] - '0');
+
+ if (i + 1 != e && ((unsigned) (Str[i + 1] - '0')) <= 7) {
+ ++i;
+ Value = Value * 8 + (Str[i] - '0');
+ }
+ }
+
+ if (Value > 255)
+ return TokError("invalid octal escape sequence (out of range)");
+
+ Data += (unsigned char) Value;
+ continue;
+ }
+
+ // Otherwise recognize individual escapes.
+ switch (Str[i]) {
+ default:
+ // Just reject invalid escape sequences for now.
+ return TokError("invalid escape sequence (unrecognized character)");
+
+ case 'b': Data += '\b'; break;
+ case 'f': Data += '\f'; break;
+ case 'n': Data += '\n'; break;
+ case 'r': Data += '\r'; break;
+ case 't': Data += '\t'; break;
+ case '"': Data += '"'; break;
+ case '\\': Data += '\\'; break;
+ }
+ }
+
+ return false;
+}
+
+/// ParseDirectiveAscii:
+/// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ]
+bool AsmParser::ParseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ CheckForValidSection();
+
+ for (;;) {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '" + Twine(IDVal) + "' directive");
+
+ std::string Data;
+ if (ParseEscapedString(Data))
+ return true;
+
+ getStreamer().EmitBytes(Data, DEFAULT_ADDRSPACE);
+ if (ZeroTerminated)
+ getStreamer().EmitBytes(StringRef("\0", 1), DEFAULT_ADDRSPACE);
+
+ Lex();
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// ParseDirectiveValue
+/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
+bool AsmParser::ParseDirectiveValue(unsigned Size) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ CheckForValidSection();
+
+ for (;;) {
+ const MCExpr *Value;
+ SMLoc ExprLoc = getLexer().getLoc();
+ if (ParseExpression(Value))
+ return true;
+
+ // Special case constant expressions to match code generator.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ assert(Size <= 8 && "Invalid size");
+ uint64_t IntValue = MCE->getValue();
+ if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
+ return Error(ExprLoc, "literal value out of range for directive");
+ getStreamer().EmitIntValue(IntValue, Size, DEFAULT_ADDRSPACE);
+ } else
+ getStreamer().EmitValue(Value, Size, DEFAULT_ADDRSPACE);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ // FIXME: Improve diagnostic.
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// ParseDirectiveRealValue
+/// ::= (.single | .double) [ expression (, expression)* ]
+bool AsmParser::ParseDirectiveRealValue(const fltSemantics &Semantics) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ CheckForValidSection();
+
+ for (;;) {
+ // We don't truly support arithmetic on floating point expressions, so we
+ // have to manually parse unary prefixes.
+ bool IsNeg = false;
+ if (getLexer().is(AsmToken::Minus)) {
+ Lex();
+ IsNeg = true;
+ } else if (getLexer().is(AsmToken::Plus))
+ Lex();
+
+ if (getLexer().isNot(AsmToken::Integer) &&
+ getLexer().isNot(AsmToken::Real) &&
+ getLexer().isNot(AsmToken::Identifier))
+ return TokError("unexpected token in directive");
+
+ // Convert to an APFloat.
+ APFloat Value(Semantics);
+ StringRef IDVal = getTok().getString();
+ if (getLexer().is(AsmToken::Identifier)) {
+ if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
+ Value = APFloat::getInf(Semantics);
+ else if (!IDVal.compare_lower("nan"))
+ Value = APFloat::getNaN(Semantics, false, ~0);
+ else
+ return TokError("invalid floating point literal");
+ } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) ==
+ APFloat::opInvalidOp)
+ return TokError("invalid floating point literal");
+ if (IsNeg)
+ Value.changeSign();
+
+ // Consume the numeric token.
+ Lex();
+
+ // Emit the value as an integer.
+ APInt AsInt = Value.bitcastToAPInt();
+ getStreamer().EmitIntValue(AsInt.getLimitedValue(),
+ AsInt.getBitWidth() / 8, DEFAULT_ADDRSPACE);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// ParseDirectiveSpace
+/// ::= .space expression [ , expression ]
+bool AsmParser::ParseDirectiveSpace() {
+ CheckForValidSection();
+
+ int64_t NumBytes;
+ if (ParseAbsoluteExpression(NumBytes))
+ return true;
+
+ int64_t FillExpr = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.space' directive");
+ Lex();
+
+ if (ParseAbsoluteExpression(FillExpr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.space' directive");
+ }
+
+ Lex();
+
+ if (NumBytes <= 0)
+ return TokError("invalid number of bytes in '.space' directive");
+
+ // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
+ getStreamer().EmitFill(NumBytes, FillExpr, DEFAULT_ADDRSPACE);
+
+ return false;
+}
+
+/// ParseDirectiveZero
+/// ::= .zero expression
+bool AsmParser::ParseDirectiveZero() {
+ CheckForValidSection();
+
+ int64_t NumBytes;
+ if (ParseAbsoluteExpression(NumBytes))
+ return true;
+
+ int64_t Val = 0;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ if (ParseAbsoluteExpression(Val))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.zero' directive");
+
+ Lex();
+
+ getStreamer().EmitFill(NumBytes, Val, DEFAULT_ADDRSPACE);
+
+ return false;
+}
+
+/// ParseDirectiveFill
+/// ::= .fill expression , expression , expression
+bool AsmParser::ParseDirectiveFill() {
+ CheckForValidSection();
+
+ int64_t NumValues;
+ if (ParseAbsoluteExpression(NumValues))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.fill' directive");
+ Lex();
+
+ int64_t FillSize;
+ if (ParseAbsoluteExpression(FillSize))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.fill' directive");
+ Lex();
+
+ int64_t FillExpr;
+ if (ParseAbsoluteExpression(FillExpr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.fill' directive");
+
+ Lex();
+
+ if (FillSize != 1 && FillSize != 2 && FillSize != 4 && FillSize != 8)
+ return TokError("invalid '.fill' size, expected 1, 2, 4, or 8");
+
+ for (uint64_t i = 0, e = NumValues; i != e; ++i)
+ getStreamer().EmitIntValue(FillExpr, FillSize, DEFAULT_ADDRSPACE);
+
+ return false;
+}
+
+/// ParseDirectiveOrg
+/// ::= .org expression [ , expression ]
+bool AsmParser::ParseDirectiveOrg() {
+ CheckForValidSection();
+
+ const MCExpr *Offset;
+ SMLoc Loc = getTok().getLoc();
+ if (ParseExpression(Offset))
+ return true;
+
+ // Parse optional fill expression.
+ int64_t FillExpr = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.org' directive");
+ Lex();
+
+ if (ParseAbsoluteExpression(FillExpr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.org' directive");
+ }
+
+ Lex();
+
+ // Only limited forms of relocatable expressions are accepted here, it
+ // has to be relative to the current section. The streamer will return
+ // 'true' if the expression wasn't evaluatable.
+ if (getStreamer().EmitValueToOffset(Offset, FillExpr))
+ return Error(Loc, "expected assembly-time absolute expression");
+
+ return false;
+}
+
+/// ParseDirectiveAlign
+/// ::= {.align, ...} expression [ , expression [ , expression ]]
+bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
+ CheckForValidSection();
+
+ SMLoc AlignmentLoc = getLexer().getLoc();
+ int64_t Alignment;
+ if (ParseAbsoluteExpression(Alignment))
+ return true;
+
+ SMLoc MaxBytesLoc;
+ bool HasFillExpr = false;
+ int64_t FillExpr = 0;
+ int64_t MaxBytesToFill = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ // The fill expression can be omitted while specifying a maximum number of
+ // alignment bytes, e.g:
+ // .align 3,,4
+ if (getLexer().isNot(AsmToken::Comma)) {
+ HasFillExpr = true;
+ if (ParseAbsoluteExpression(FillExpr))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ MaxBytesLoc = getLexer().getLoc();
+ if (ParseAbsoluteExpression(MaxBytesToFill))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+ }
+ }
+
+ Lex();
+
+ if (!HasFillExpr)
+ FillExpr = 0;
+
+ // Compute alignment in bytes.
+ if (IsPow2) {
+ // FIXME: Diagnose overflow.
+ if (Alignment >= 32) {
+ Error(AlignmentLoc, "invalid alignment value");
+ Alignment = 31;
+ }
+
+ Alignment = 1ULL << Alignment;
+ }
+
+ // Diagnose non-sensical max bytes to align.
+ if (MaxBytesLoc.isValid()) {
+ if (MaxBytesToFill < 1) {
+ Error(MaxBytesLoc, "alignment directive can never be satisfied in this "
+ "many bytes, ignoring maximum bytes expression");
+ MaxBytesToFill = 0;
+ }
+
+ if (MaxBytesToFill >= Alignment) {
+ Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
+ "has no effect");
+ MaxBytesToFill = 0;
+ }
+ }
+
+ // Check whether we should use optimal code alignment for this .align
+ // directive.
+ bool UseCodeAlign = getStreamer().getCurrentSection()->UseCodeAlign();
+ if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
+ ValueSize == 1 && UseCodeAlign) {
+ getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill);
+ } else {
+ // FIXME: Target specific behavior about how the "extra" bytes are filled.
+ getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize,
+ MaxBytesToFill);
+ }
+
+ return false;
+}
+
+/// ParseDirectiveSymbolAttribute
+/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
+bool AsmParser::ParseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ StringRef Name;
+ SMLoc Loc = getTok().getLoc();
+
+ if (ParseIdentifier(Name))
+ return Error(Loc, "expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ // Assembler local symbols don't make any sense here. Complain loudly.
+ if (Sym->isTemporary())
+ return Error(Loc, "non-local symbol required in directive");
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// ParseDirectiveComm
+/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
+bool AsmParser::ParseDirectiveComm(bool IsLocal) {
+ CheckForValidSection();
+
+ SMLoc IDLoc = getLexer().getLoc();
+ StringRef Name;
+ if (ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = getLexer().getLoc();
+ if (ParseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ Pow2AlignmentLoc = getLexer().getLoc();
+ if (ParseAbsoluteExpression(Pow2Alignment))
+ return true;
+
+ // If this target takes alignments in bytes (not log) validate and convert.
+ if (Lexer.getMAI().getAlignmentIsInBytes()) {
+ if (!isPowerOf2_64(Pow2Alignment))
+ return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
+ Pow2Alignment = Log2_64(Pow2Alignment);
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.comm' or '.lcomm' directive");
+
+ Lex();
+
+ // NOTE: a size of zero for a .comm should create a undefined symbol
+ // but a size of .lcomm creates a bss symbol of size zero.
+ if (Size < 0)
+ return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
+ "be less than zero");
+
+ // NOTE: The alignment in the directive is a power of 2 value, the assembler
+ // may internally end up wanting an alignment in bytes.
+ // FIXME: Diagnose overflow.
+ if (Pow2Alignment < 0)
+ return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
+ "alignment, can't be less than zero");
+
+ if (!Sym->isUndefined())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ // '.lcomm' is equivalent to '.zerofill'.
+ // Create the Symbol as a common or local common with Size and Pow2Alignment
+ if (IsLocal) {
+ getStreamer().EmitZerofill(Ctx.getMachOSection(
+ "__DATA", "__bss", MCSectionMachO::S_ZEROFILL,
+ 0, SectionKind::getBSS()),
+ Sym, Size, 1 << Pow2Alignment);
+ return false;
+ }
+
+ getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
+ return false;
+}
+
+/// ParseDirectiveAbort
+/// ::= .abort [... message ...]
+bool AsmParser::ParseDirectiveAbort() {
+ // FIXME: Use loc from directive.
+ SMLoc Loc = getLexer().getLoc();
+
+ StringRef Str = ParseStringToEndOfStatement();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.abort' directive");
+
+ Lex();
+
+ if (Str.empty())
+ Error(Loc, ".abort detected. Assembly stopping.");
+ else
+ Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
+ // FIXME: Actually abort assembly here.
+
+ return false;
+}
+
+/// ParseDirectiveInclude
+/// ::= .include "filename"
+bool AsmParser::ParseDirectiveInclude() {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.include' directive");
+
+ std::string Filename = getTok().getString();
+ SMLoc IncludeLoc = getLexer().getLoc();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.include' directive");
+
+ // Strip the quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
+
+ // Attempt to switch the lexer to the included file before consuming the end
+ // of statement to avoid losing it when we switch.
+ if (EnterIncludeFile(Filename)) {
+ Error(IncludeLoc, "Could not find include file '" + Filename + "'");
+ return true;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveIncbin
+/// ::= .incbin "filename"
+bool AsmParser::ParseDirectiveIncbin() {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.incbin' directive");
+
+ std::string Filename = getTok().getString();
+ SMLoc IncbinLoc = getLexer().getLoc();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.incbin' directive");
+
+ // Strip the quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
+
+ // Attempt to process the included file.
+ if (ProcessIncbinFile(Filename)) {
+ Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
+ return true;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveIf
+/// ::= .if expression
+bool AsmParser::ParseDirectiveIf(SMLoc DirectiveLoc) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ int64_t ExprValue;
+ if (ParseAbsoluteExpression(ExprValue))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.if' directive");
+
+ Lex();
+
+ TheCondState.CondMet = ExprValue;
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveIfb
+/// ::= .ifb string
+bool AsmParser::ParseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ StringRef Str = ParseStringToEndOfStatement();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifb' directive");
+
+ Lex();
+
+ TheCondState.CondMet = ExpectBlank == Str.empty();
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveIfc
+/// ::= .ifc string1, string2
+bool AsmParser::ParseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ StringRef Str1 = ParseStringToComma();
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.ifc' directive");
+
+ Lex();
+
+ StringRef Str2 = ParseStringToEndOfStatement();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifc' directive");
+
+ Lex();
+
+ TheCondState.CondMet = ExpectEqual == (Str1 == Str2);
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveIfdef
+/// ::= .ifdef symbol
+bool AsmParser::ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
+ StringRef Name;
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ if (ParseIdentifier(Name))
+ return TokError("expected identifier after '.ifdef'");
+
+ Lex();
+
+ MCSymbol *Sym = getContext().LookupSymbol(Name);
+
+ if (expect_defined)
+ TheCondState.CondMet = (Sym != NULL && !Sym->isUndefined());
+ else
+ TheCondState.CondMet = (Sym == NULL || Sym->isUndefined());
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveElseIf
+/// ::= .elseif expression
+bool AsmParser::ParseDirectiveElseIf(SMLoc DirectiveLoc) {
+ if (TheCondState.TheCond != AsmCond::IfCond &&
+ TheCondState.TheCond != AsmCond::ElseIfCond)
+ Error(DirectiveLoc, "Encountered a .elseif that doesn't follow a .if or "
+ " an .elseif");
+ TheCondState.TheCond = AsmCond::ElseIfCond;
+
+ bool LastIgnoreState = false;
+ if (!TheCondStack.empty())
+ LastIgnoreState = TheCondStack.back().Ignore;
+ if (LastIgnoreState || TheCondState.CondMet) {
+ TheCondState.Ignore = true;
+ EatToEndOfStatement();
+ }
+ else {
+ int64_t ExprValue;
+ if (ParseAbsoluteExpression(ExprValue))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.elseif' directive");
+
+ Lex();
+ TheCondState.CondMet = ExprValue;
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveElse
+/// ::= .else
+bool AsmParser::ParseDirectiveElse(SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.else' directive");
+
+ Lex();
+
+ if (TheCondState.TheCond != AsmCond::IfCond &&
+ TheCondState.TheCond != AsmCond::ElseIfCond)
+ Error(DirectiveLoc, "Encountered a .else that doesn't follow a .if or an "
+ ".elseif");
+ TheCondState.TheCond = AsmCond::ElseCond;
+ bool LastIgnoreState = false;
+ if (!TheCondStack.empty())
+ LastIgnoreState = TheCondStack.back().Ignore;
+ if (LastIgnoreState || TheCondState.CondMet)
+ TheCondState.Ignore = true;
+ else
+ TheCondState.Ignore = false;
+
+ return false;
+}
+
+/// ParseDirectiveEndIf
+/// ::= .endif
+bool AsmParser::ParseDirectiveEndIf(SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.endif' directive");
+
+ Lex();
+
+ if ((TheCondState.TheCond == AsmCond::NoCond) ||
+ TheCondStack.empty())
+ Error(DirectiveLoc, "Encountered a .endif that doesn't follow a .if or "
+ ".else");
+ if (!TheCondStack.empty()) {
+ TheCondState = TheCondStack.back();
+ TheCondStack.pop_back();
+ }
+
+ return false;
+}
+
+/// ParseDirectiveFile
+/// ::= .file [number] filename
+/// ::= .file number directory filename
+bool GenericAsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
+ // FIXME: I'm not sure what this is.
+ int64_t FileNumber = -1;
+ SMLoc FileNumberLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Integer)) {
+ FileNumber = getTok().getIntVal();
+ Lex();
+
+ if (FileNumber < 1)
+ return TokError("file number less than one");
+ }
+
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("unexpected token in '.file' directive");
+
+ // Usually the directory and filename together, otherwise just the directory.
+ StringRef Path = getTok().getString();
+ Path = Path.substr(1, Path.size()-2);
+ Lex();
+
+ StringRef Directory;
+ StringRef Filename;
+ if (getLexer().is(AsmToken::String)) {
+ if (FileNumber == -1)
+ return TokError("explicit path specified, but no file number");
+ Filename = getTok().getString();
+ Filename = Filename.substr(1, Filename.size()-2);
+ Directory = Path;
+ Lex();
+ } else {
+ Filename = Path;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.file' directive");
+
+ if (FileNumber == -1)
+ getStreamer().EmitFileDirective(Filename);
+ else {
+ if (getContext().getGenDwarfForAssembly() == true)
+ Error(DirectiveLoc, "input can't have .file dwarf directives when -g is "
+ "used to generate dwarf debug info for assembly code");
+
+ if (getStreamer().EmitDwarfFileDirective(FileNumber, Directory, Filename))
+ Error(FileNumberLoc, "file number already allocated");
+ }
+
+ return false;
+}
+
+/// ParseDirectiveLine
+/// ::= .line [number]
+bool 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();
+ (void) LineNumber;
+ Lex();
+
+ // FIXME: Do something with the .line.
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.line' directive");
+
+ return false;
+}
+
+
+/// ParseDirectiveLoc
+/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
+/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
+/// The first number is a file number, must have been previously assigned with
+/// a .file directive, the second number is the line number and optionally the
+/// third number is a column position (zero if not specified). The remaining
+/// optional items are .loc sub-directives.
+bool GenericAsmParser::ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc) {
+
+ if (getLexer().isNot(AsmToken::Integer))
+ return TokError("unexpected token in '.loc' directive");
+ int64_t FileNumber = getTok().getIntVal();
+ if (FileNumber < 1)
+ return TokError("file number less than one in '.loc' directive");
+ if (!getContext().isValidDwarfFileNumber(FileNumber))
+ return TokError("unassigned file number in '.loc' directive");
+ Lex();
+
+ int64_t LineNumber = 0;
+ if (getLexer().is(AsmToken::Integer)) {
+ LineNumber = getTok().getIntVal();
+ if (LineNumber < 1)
+ return TokError("line number less than one in '.loc' directive");
+ Lex();
+ }
+
+ int64_t ColumnPos = 0;
+ if (getLexer().is(AsmToken::Integer)) {
+ ColumnPos = getTok().getIntVal();
+ if (ColumnPos < 0)
+ return TokError("column position less than zero in '.loc' directive");
+ Lex();
+ }
+
+ unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
+ unsigned Isa = 0;
+ int64_t Discriminator = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ StringRef Name;
+ SMLoc Loc = getTok().getLoc();
+ if (getParser().ParseIdentifier(Name))
+ return TokError("unexpected token in '.loc' directive");
+
+ if (Name == "basic_block")
+ Flags |= DWARF2_FLAG_BASIC_BLOCK;
+ else if (Name == "prologue_end")
+ Flags |= DWARF2_FLAG_PROLOGUE_END;
+ else if (Name == "epilogue_begin")
+ Flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
+ else if (Name == "is_stmt") {
+ SMLoc Loc = getTok().getLoc();
+ const MCExpr *Value;
+ if (getParser().ParseExpression(Value))
+ return true;
+ // The expression must be the constant 0 or 1.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ int Value = MCE->getValue();
+ if (Value == 0)
+ Flags &= ~DWARF2_FLAG_IS_STMT;
+ else if (Value == 1)
+ Flags |= DWARF2_FLAG_IS_STMT;
+ else
+ return Error(Loc, "is_stmt value not 0 or 1");
+ }
+ else {
+ return Error(Loc, "is_stmt value not the constant value of 0 or 1");
+ }
+ }
+ else if (Name == "isa") {
+ SMLoc Loc = getTok().getLoc();
+ const MCExpr *Value;
+ if (getParser().ParseExpression(Value))
+ return true;
+ // The expression must be a constant greater or equal to 0.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ int Value = MCE->getValue();
+ if (Value < 0)
+ return Error(Loc, "isa number less than zero");
+ Isa = Value;
+ }
+ else {
+ return Error(Loc, "isa number not a constant value");
+ }
+ }
+ else if (Name == "discriminator") {
+ if (getParser().ParseAbsoluteExpression(Discriminator))
+ return true;
+ }
+ else {
+ return Error(Loc, "unknown sub-directive in '.loc' directive");
+ }
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+ }
+ }
+
+ getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
+ Isa, Discriminator, StringRef());
+
+ return false;
+}
+
+/// ParseDirectiveStabs
+/// ::= .stabs string, number, number, number
+bool GenericAsmParser::ParseDirectiveStabs(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ return TokError("unsupported directive '" + Directive + "'");
+}
+
+/// ParseDirectiveCFISections
+/// ::= .cfi_sections section [, section]
+bool GenericAsmParser::ParseDirectiveCFISections(StringRef,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ bool EH = false;
+ bool Debug = false;
+
+ if (getParser().ParseIdentifier(Name))
+ return TokError("Expected an identifier");
+
+ if (Name == ".eh_frame")
+ EH = true;
+ else if (Name == ".debug_frame")
+ Debug = true;
+
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getParser().ParseIdentifier(Name))
+ return TokError("Expected an identifier");
+
+ if (Name == ".eh_frame")
+ EH = true;
+ else if (Name == ".debug_frame")
+ Debug = true;
+ }
+
+ getStreamer().EmitCFISections(EH, Debug);
+
+ return false;
+}
+
+/// ParseDirectiveCFIStartProc
+/// ::= .cfi_startproc
+bool GenericAsmParser::ParseDirectiveCFIStartProc(StringRef,
+ SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIStartProc();
+ return false;
+}
+
+/// ParseDirectiveCFIEndProc
+/// ::= .cfi_endproc
+bool GenericAsmParser::ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIEndProc();
+ return false;
+}
+
+/// ParseRegisterOrRegisterNumber - parse register name or number.
+bool GenericAsmParser::ParseRegisterOrRegisterNumber(int64_t &Register,
+ SMLoc DirectiveLoc) {
+ unsigned RegNo;
+
+ if (getLexer().isNot(AsmToken::Integer)) {
+ if (getParser().getTargetParser().ParseRegister(RegNo, DirectiveLoc,
+ DirectiveLoc))
+ return true;
+ Register = getContext().getRegisterInfo().getDwarfRegNum(RegNo, true);
+ } else
+ return getParser().ParseAbsoluteExpression(Register);
+
+ return false;
+}
+
+/// ParseDirectiveCFIDefCfa
+/// ::= .cfi_def_cfa register, offset
+bool GenericAsmParser::ParseDirectiveCFIDefCfa(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Offset = 0;
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIDefCfa(Register, Offset);
+ return false;
+}
+
+/// ParseDirectiveCFIDefCfaOffset
+/// ::= .cfi_def_cfa_offset offset
+bool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Offset = 0;
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIDefCfaOffset(Offset);
+ return false;
+}
+
+/// ParseDirectiveCFIAdjustCfaOffset
+/// ::= .cfi_adjust_cfa_offset adjustment
+bool GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Adjustment = 0;
+ if (getParser().ParseAbsoluteExpression(Adjustment))
+ return true;
+
+ getStreamer().EmitCFIAdjustCfaOffset(Adjustment);
+ return false;
+}
+
+/// ParseDirectiveCFIDefCfaRegister
+/// ::= .cfi_def_cfa_register register
+bool GenericAsmParser::ParseDirectiveCFIDefCfaRegister(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIDefCfaRegister(Register);
+ return false;
+}
+
+/// ParseDirectiveCFIOffset
+/// ::= .cfi_offset register, offset
+bool GenericAsmParser::ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ int64_t Offset = 0;
+
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIOffset(Register, Offset);
+ return false;
+}
+
+/// ParseDirectiveCFIRelOffset
+/// ::= .cfi_rel_offset register, offset
+bool GenericAsmParser::ParseDirectiveCFIRelOffset(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Offset = 0;
+ if (getParser().ParseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIRelOffset(Register, Offset);
+ return false;
+}
+
+static bool isValidEncoding(int64_t Encoding) {
+ if (Encoding & ~0xff)
+ return false;
+
+ if (Encoding == dwarf::DW_EH_PE_omit)
+ return true;
+
+ const unsigned Format = Encoding & 0xf;
+ if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
+ Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
+ Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
+ Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
+ return false;
+
+ const unsigned Application = Encoding & 0x70;
+ if (Application != dwarf::DW_EH_PE_absptr &&
+ Application != dwarf::DW_EH_PE_pcrel)
+ return false;
+
+ return true;
+}
+
+/// ParseDirectiveCFIPersonalityOrLsda
+/// ::= .cfi_personality encoding, [symbol_name]
+/// ::= .cfi_lsda encoding, [symbol_name]
+bool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ int64_t Encoding = 0;
+ if (getParser().ParseAbsoluteExpression(Encoding))
+ return true;
+ if (Encoding == dwarf::DW_EH_PE_omit)
+ return false;
+
+ if (!isValidEncoding(Encoding))
+ return TokError("unsupported encoding.");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (IDVal == ".cfi_personality")
+ getStreamer().EmitCFIPersonality(Sym, Encoding);
+ else {
+ assert(IDVal == ".cfi_lsda");
+ getStreamer().EmitCFILsda(Sym, Encoding);
+ }
+ return false;
+}
+
+/// ParseDirectiveCFIRememberState
+/// ::= .cfi_remember_state
+bool GenericAsmParser::ParseDirectiveCFIRememberState(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIRememberState();
+ return false;
+}
+
+/// ParseDirectiveCFIRestoreState
+/// ::= .cfi_remember_state
+bool GenericAsmParser::ParseDirectiveCFIRestoreState(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ getStreamer().EmitCFIRestoreState();
+ return false;
+}
+
+/// ParseDirectiveCFISameValue
+/// ::= .cfi_same_value register
+bool GenericAsmParser::ParseDirectiveCFISameValue(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFISameValue(Register);
+
+ return false;
+}
+
+/// ParseDirectiveCFIRestore
+/// ::= .cfi_restore register
+bool GenericAsmParser::ParseDirectiveCFIRestore(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIRestore(Register);
+
+ return false;
+}
+
+/// ParseDirectiveCFIEscape
+/// ::= .cfi_escape expression[,...]
+bool GenericAsmParser::ParseDirectiveCFIEscape(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ std::string Values;
+ int64_t CurrValue;
+ if (getParser().ParseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+
+ while (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getParser().ParseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+ }
+
+ getStreamer().EmitCFIEscape(Values);
+ return false;
+}
+
+/// ParseDirectiveCFISignalFrame
+/// ::= .cfi_signal_frame
+bool GenericAsmParser::ParseDirectiveCFISignalFrame(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ getStreamer().EmitCFISignalFrame();
+
+ return false;
+}
+
+/// ParseDirectiveMacrosOnOff
+/// ::= .macros_on
+/// ::= .macros_off
+bool GenericAsmParser::ParseDirectiveMacrosOnOff(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ getParser().MacrosEnabled = Directive == ".macros_on";
+
+ return false;
+}
+
+/// ParseDirectiveMacro
+/// ::= .macro name [parameters]
+bool GenericAsmParser::ParseDirectiveMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MacroParameters Parameters;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for(;;) {
+ StringRef Parameter;
+ if (getParser().ParseIdentifier(Parameter))
+ return TokError("expected identifier in directive");
+ Parameters.push_back(Parameter);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ break;
+ Lex();
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.macro' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ AsmToken EndToken, StartToken = getTok();
+
+ // Lex the macro definition.
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof))
+ return Error(DirectiveLoc, "no matching '.endmacro' in definition");
+
+ // Otherwise, check whether we have reach the .endmacro.
+ if (getLexer().is(AsmToken::Identifier) &&
+ (getTok().getIdentifier() == ".endm" ||
+ getTok().getIdentifier() == ".endmacro")) {
+ EndToken = getTok();
+ Lex();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + EndToken.getIdentifier() +
+ "' directive");
+ break;
+ }
+
+ // Otherwise, scan til the end of the statement.
+ getParser().EatToEndOfStatement();
+ }
+
+ if (getParser().MacroMap.lookup(Name)) {
+ return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+ getParser().MacroMap[Name] = new Macro(Name, Body, Parameters);
+ return false;
+}
+
+/// ParseDirectiveEndMacro
+/// ::= .endm
+/// ::= .endmacro
+bool GenericAsmParser::ParseDirectiveEndMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + Directive + "' directive");
+
+ // If we are inside a macro instantiation, terminate the current
+ // instantiation.
+ if (!getParser().ActiveMacros.empty()) {
+ getParser().HandleMacroExit();
+ return false;
+ }
+
+ // Otherwise, this .endmacro is a stray entry in the file; well formed
+ // .endmacro directives are handled during the macro definition parsing.
+ return TokError("unexpected '" + Directive + "' in file, "
+ "no current macro definition");
+}
+
+/// ParseDirectivePurgeMacro
+/// ::= .purgem
+bool GenericAsmParser::ParseDirectivePurgeMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in '.purgem' directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.purgem' directive");
+
+ StringMap<Macro*>::iterator I = getParser().MacroMap.find(Name);
+ if (I == getParser().MacroMap.end())
+ return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
+
+ // Undefine the macro.
+ delete I->getValue();
+ getParser().MacroMap.erase(I);
+ return false;
+}
+
+bool GenericAsmParser::ParseDirectiveLEB128(StringRef DirName, SMLoc) {
+ getParser().CheckForValidSection();
+
+ const MCExpr *Value;
+
+ if (getParser().ParseExpression(Value))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ if (DirName[1] == 's')
+ getStreamer().EmitSLEB128Value(Value);
+ else
+ getStreamer().EmitULEB128Value(Value);
+
+ return false;
+}
+
+Macro *AsmParser::ParseMacroLikeBody(SMLoc DirectiveLoc) {
+ AsmToken EndToken, StartToken = getTok();
+
+ unsigned NestLevel = 0;
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof)) {
+ Error(DirectiveLoc, "no matching '.endr' in definition");
+ return 0;
+ }
+
+ if (Lexer.is(AsmToken::Identifier) &&
+ (getTok().getIdentifier() == ".rept")) {
+ ++NestLevel;
+ }
+
+ // Otherwise, check whether we have reached the .endr.
+ if (Lexer.is(AsmToken::Identifier) &&
+ getTok().getIdentifier() == ".endr") {
+ if (NestLevel == 0) {
+ EndToken = getTok();
+ Lex();
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ TokError("unexpected token in '.endr' directive");
+ return 0;
+ }
+ break;
+ }
+ --NestLevel;
+ }
+
+ // Otherwise, scan till the end of the statement.
+ EatToEndOfStatement();
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+
+ // We Are Anonymous.
+ StringRef Name;
+ MacroParameters Parameters;
+ return new Macro(Name, Body, Parameters);
+}
+
+void AsmParser::InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS) {
+ OS << ".endr\n";
+
+ MemoryBuffer *Instantiation =
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(M, DirectiveLoc,
+ getTok().getLoc(),
+ Instantiation);
+ ActiveMacros.push_back(MI);
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+ Lex();
+}
+
+bool AsmParser::ParseDirectiveRept(SMLoc DirectiveLoc) {
+ int64_t Count;
+ if (ParseAbsoluteExpression(Count))
+ return TokError("unexpected token in '.rept' directive");
+
+ if (Count < 0)
+ return TokError("Count is negative");
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.rept' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the rept definition.
+ Macro *M = ParseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ MacroParameters Parameters;
+ MacroArguments A;
+ raw_svector_ostream OS(Buf);
+ while (Count--) {
+ if (expandMacro(OS, M->Body, Parameters, A, getTok().getLoc()))
+ return true;
+ }
+ InstantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+/// ParseDirectiveIrp
+/// ::= .irp symbol,values
+bool AsmParser::ParseDirectiveIrp(SMLoc DirectiveLoc) {
+ MacroParameters Parameters;
+ MacroParameter Parameter;
+
+ if (ParseIdentifier(Parameter))
+ return TokError("expected identifier in '.irp' directive");
+
+ Parameters.push_back(Parameter);
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("expected comma in '.irp' directive");
+
+ Lex();
+
+ MacroArguments A;
+ if (ParseMacroArguments(0, A))
+ return true;
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the irp definition.
+ Macro *M = ParseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ raw_svector_ostream OS(Buf);
+
+ for (std::vector<MacroArgument>::iterator i = A.begin(), e = A.end(); i != e;
+ ++i) {
+ std::vector<MacroArgument> Args;
+ Args.push_back(*i);
+
+ if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
+ return true;
+ }
+
+ InstantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+/// ParseDirectiveIrpc
+/// ::= .irpc symbol,values
+bool AsmParser::ParseDirectiveIrpc(SMLoc DirectiveLoc) {
+ MacroParameters Parameters;
+ MacroParameter Parameter;
+
+ if (ParseIdentifier(Parameter))
+ return TokError("expected identifier in '.irpc' directive");
+
+ Parameters.push_back(Parameter);
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("expected comma in '.irpc' directive");
+
+ Lex();
+
+ MacroArguments A;
+ if (ParseMacroArguments(0, A))
+ return true;
+
+ if (A.size() != 1 || A.front().size() != 1)
+ return TokError("unexpected token in '.irpc' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the irpc definition.
+ Macro *M = ParseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ raw_svector_ostream OS(Buf);
+
+ StringRef Values = A.front().front().getString();
+ std::size_t I, End = Values.size();
+ for (I = 0; I < End; ++I) {
+ MacroArgument Arg;
+ Arg.push_back(AsmToken(AsmToken::Identifier, Values.slice(I, I+1)));
+
+ MacroArguments Args;
+ Args.push_back(Arg);
+
+ if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
+ return true;
+ }
+
+ InstantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+bool AsmParser::ParseDirectiveEndr(SMLoc DirectiveLoc) {
+ if (ActiveMacros.empty())
+ return TokError("unexpected '.endr' directive, no current .rept");
+
+ // The only .repl that should get here are the ones created by
+ // InstantiateMacroLikeBody.
+ assert(getLexer().is(AsmToken::EndOfStatement));
+
+ HandleMacroExit();
+ return false;
+}
+
+/// \brief Create an MCAsmParser instance.
+MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM,
+ MCContext &C, MCStreamer &Out,
+ const MCAsmInfo &MAI) {
+ return new AsmParser(SM, C, Out, MAI);
+}
diff --git a/contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp
new file mode 100644
index 0000000..c4cdc3c
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp
@@ -0,0 +1,498 @@
+//===- COFFAsmParser.cpp - COFF Assembly Parser ---------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/COFF.h"
+using namespace llvm;
+
+namespace {
+
+class COFFAsmParser : public MCAsmParserExtension {
+ template<bool (COFFAsmParser::*Handler)(StringRef, SMLoc)>
+ void AddDirectiveHandler(StringRef Directive) {
+ getParser().AddDirectiveHandler(this, Directive,
+ HandleDirective<COFFAsmParser, Handler>);
+ }
+
+ bool ParseSectionSwitch(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind);
+
+ virtual void Initialize(MCAsmParser &Parser) {
+ // Call the base implementation.
+ MCAsmParserExtension::Initialize(Parser);
+
+ AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveText>(".text");
+ AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveData>(".data");
+ AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveBSS>(".bss");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveDef>(".def");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveScl>(".scl");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveType>(".type");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveEndef>(".endef");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveSecRel32>(".secrel32");
+
+ // Win64 EH directives.
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartProc>(
+ ".seh_proc");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProc>(
+ ".seh_endproc");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartChained>(
+ ".seh_startchained");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndChained>(
+ ".seh_endchained");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandler>(
+ ".seh_handler");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandlerData>(
+ ".seh_handlerdata");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushReg>(
+ ".seh_pushreg");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSetFrame>(
+ ".seh_setframe");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveAllocStack>(
+ ".seh_stackalloc");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveReg>(
+ ".seh_savereg");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveXMM>(
+ ".seh_savexmm");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushFrame>(
+ ".seh_pushframe");
+ AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProlog>(
+ ".seh_endprologue");
+ AddDirectiveHandler<&COFFAsmParser::ParseDirectiveSymbolAttribute>(".weak");
+ }
+
+ bool ParseSectionDirectiveText(StringRef, SMLoc) {
+ return ParseSectionSwitch(".text",
+ COFF::IMAGE_SCN_CNT_CODE
+ | COFF::IMAGE_SCN_MEM_EXECUTE
+ | COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getText());
+ }
+ bool ParseSectionDirectiveData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data",
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA
+ | COFF::IMAGE_SCN_MEM_READ
+ | COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
+ }
+ bool ParseSectionDirectiveBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".bss",
+ COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA
+ | COFF::IMAGE_SCN_MEM_READ
+ | COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getBSS());
+ }
+
+ bool ParseDirectiveDef(StringRef, SMLoc);
+ bool ParseDirectiveScl(StringRef, SMLoc);
+ bool ParseDirectiveType(StringRef, SMLoc);
+ bool ParseDirectiveEndef(StringRef, SMLoc);
+ bool ParseDirectiveSecRel32(StringRef, SMLoc);
+
+ // Win64 EH directives.
+ bool ParseSEHDirectiveStartProc(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndProc(StringRef, SMLoc);
+ bool ParseSEHDirectiveStartChained(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndChained(StringRef, SMLoc);
+ bool ParseSEHDirectiveHandler(StringRef, SMLoc);
+ bool ParseSEHDirectiveHandlerData(StringRef, SMLoc);
+ bool ParseSEHDirectivePushReg(StringRef, SMLoc);
+ bool ParseSEHDirectiveSetFrame(StringRef, SMLoc);
+ bool ParseSEHDirectiveAllocStack(StringRef, SMLoc);
+ bool ParseSEHDirectiveSaveReg(StringRef, SMLoc);
+ bool ParseSEHDirectiveSaveXMM(StringRef, SMLoc);
+ bool ParseSEHDirectivePushFrame(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndProlog(StringRef, SMLoc);
+
+ bool ParseAtUnwindOrAtExcept(bool &unwind, bool &except);
+ bool ParseSEHRegisterNumber(unsigned &RegNo);
+ bool ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc);
+public:
+ COFFAsmParser() {}
+};
+
+} // end annonomous namespace.
+
+/// ParseDirectiveSymbolAttribute
+/// ::= { ".weak", ... } [ identifier ( , identifier )* ]
+bool COFFAsmParser::ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc) {
+ MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Directive)
+ .Case(".weak", MCSA_Weak)
+ .Default(MCSA_Invalid);
+ assert(Attr != MCSA_Invalid && "unexpected symbol attribute directive!");
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ StringRef Name;
+
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+bool COFFAsmParser::ParseSectionSwitch(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in section switching directive");
+ Lex();
+
+ getStreamer().SwitchSection(getContext().getCOFFSection(
+ Section, Characteristics, Kind));
+
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveDef(StringRef, SMLoc) {
+ StringRef SymbolName;
+
+ if (getParser().ParseIdentifier(SymbolName))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(SymbolName);
+
+ getStreamer().BeginCOFFSymbolDef(Sym);
+
+ Lex();
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveScl(StringRef, SMLoc) {
+ int64_t SymbolStorageClass;
+ if (getParser().ParseAbsoluteExpression(SymbolStorageClass))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitCOFFSymbolStorageClass(SymbolStorageClass);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
+ int64_t Type;
+ if (getParser().ParseAbsoluteExpression(Type))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitCOFFSymbolType(Type);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveEndef(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EndCOFFSymbolDef();
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveSecRel32(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().ParseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().GetOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitCOFFSecRel32(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveStartProc(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().ParseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().GetOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitWin64EHStartProc(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndProc(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHEndProc();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveStartChained(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHStartChained();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndChained(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHEndChained();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveHandler(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().ParseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify one or both of @unwind or @except");
+ Lex();
+ bool unwind = false, except = false;
+ if (ParseAtUnwindOrAtExcept(unwind, except))
+ return true;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ if (ParseAtUnwindOrAtExcept(unwind, except))
+ return true;
+ }
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *handler = getContext().GetOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitWin64EHHandler(handler, unwind, except);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveHandlerData(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHHandlerData();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectivePushReg(StringRef, SMLoc L) {
+ unsigned Reg;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHPushReg(Reg);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveSetFrame(StringRef, SMLoc L) {
+ unsigned Reg;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify a stack pointer offset");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Off))
+ return true;
+
+ if (Off & 0x0F)
+ return Error(startLoc, "offset is not a multiple of 16");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHSetFrame(Reg, Off);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveAllocStack(StringRef, SMLoc) {
+ int64_t Size;
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Size))
+ return true;
+
+ if (Size & 7)
+ return Error(startLoc, "size is not a multiple of 8");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHAllocStack(Size);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveSaveReg(StringRef, SMLoc L) {
+ unsigned Reg;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify an offset on the stack");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Off))
+ return true;
+
+ if (Off & 7)
+ return Error(startLoc, "size is not a multiple of 8");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ // FIXME: Err on %xmm* registers
+ getStreamer().EmitWin64EHSaveReg(Reg, Off);
+ return false;
+}
+
+// FIXME: This method is inherently x86-specific. It should really be in the
+// x86 backend.
+bool COFFAsmParser::ParseSEHDirectiveSaveXMM(StringRef, SMLoc L) {
+ unsigned Reg;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify an offset on the stack");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Off))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ if (Off & 0x0F)
+ return Error(startLoc, "offset is not a multiple of 16");
+
+ Lex();
+ // FIXME: Err on non-%xmm* registers
+ getStreamer().EmitWin64EHSaveXMM(Reg, Off);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectivePushFrame(StringRef, SMLoc) {
+ bool Code = false;
+ StringRef CodeID;
+ if (getLexer().is(AsmToken::At)) {
+ SMLoc startLoc = getLexer().getLoc();
+ Lex();
+ if (!getParser().ParseIdentifier(CodeID)) {
+ if (CodeID != "code")
+ return Error(startLoc, "expected @code");
+ Code = true;
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWin64EHPushFrame(Code);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndProlog(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWin64EHEndProlog();
+ return false;
+}
+
+bool COFFAsmParser::ParseAtUnwindOrAtExcept(bool &unwind, bool &except) {
+ StringRef identifier;
+ if (getLexer().isNot(AsmToken::At))
+ return TokError("a handler attribute must begin with '@'");
+ SMLoc startLoc = getLexer().getLoc();
+ Lex();
+ if (getParser().ParseIdentifier(identifier))
+ return Error(startLoc, "expected @unwind or @except");
+ if (identifier == "unwind")
+ unwind = true;
+ else if (identifier == "except")
+ except = true;
+ else
+ return Error(startLoc, "expected @unwind or @except");
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHRegisterNumber(unsigned &RegNo) {
+ SMLoc startLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Percent)) {
+ const MCRegisterInfo &MRI = getContext().getRegisterInfo();
+ SMLoc endLoc;
+ unsigned LLVMRegNo;
+ if (getParser().getTargetParser().ParseRegister(LLVMRegNo,startLoc,endLoc))
+ return true;
+
+#if 0
+ // FIXME: TargetAsmInfo::getCalleeSavedRegs() commits a serious layering
+ // violation so this validation code is disabled.
+
+ // Check that this is a non-volatile register.
+ const unsigned *NVRegs = TAI.getCalleeSavedRegs();
+ unsigned i;
+ for (i = 0; NVRegs[i] != 0; ++i)
+ if (NVRegs[i] == LLVMRegNo)
+ break;
+ if (NVRegs[i] == 0)
+ return Error(startLoc, "expected non-volatile register");
+#endif
+
+ int SEHRegNo = MRI.getSEHRegNum(LLVMRegNo);
+ if (SEHRegNo < 0)
+ return Error(startLoc,"register can't be represented in SEH unwind info");
+ RegNo = SEHRegNo;
+ }
+ else {
+ int64_t n;
+ if (getParser().ParseAbsoluteExpression(n))
+ return true;
+ if (n > 15)
+ return Error(startLoc, "register number is too high");
+ RegNo = n;
+ }
+
+ return false;
+}
+
+namespace llvm {
+
+MCAsmParserExtension *createCOFFAsmParser() {
+ return new COFFAsmParser;
+}
+
+}
diff --git a/contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp
new file mode 100644
index 0000000..18033d0
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp
@@ -0,0 +1,747 @@
+//===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+using namespace llvm;
+
+namespace {
+
+/// \brief Implementation of directive handling which is shared across all
+/// Darwin targets.
+class DarwinAsmParser : public MCAsmParserExtension {
+ template<bool (DarwinAsmParser::*Handler)(StringRef, SMLoc)>
+ void AddDirectiveHandler(StringRef Directive) {
+ getParser().AddDirectiveHandler(this, Directive,
+ HandleDirective<DarwinAsmParser, Handler>);
+ }
+
+ bool ParseSectionSwitch(const char *Segment, const char *Section,
+ unsigned TAA = 0, unsigned ImplicitAlign = 0,
+ unsigned StubSize = 0);
+
+public:
+ DarwinAsmParser() {}
+
+ virtual void Initialize(MCAsmParser &Parser) {
+ // Call the base implementation.
+ this->MCAsmParserExtension::Initialize(Parser);
+
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDesc>(".desc");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveLsym>(".lsym");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSubsectionsViaSymbols>(
+ ".subsections_via_symbols");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDumpOrLoad>(".dump");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDumpOrLoad>(".load");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSection>(".section");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectivePushSection>(".pushsection");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectivePopSection>(".popsection");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectivePrevious>(".previous");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSecureLogUnique>(
+ ".secure_log_unique");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveSecureLogReset>(
+ ".secure_log_reset");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveTBSS>(".tbss");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveZerofill>(".zerofill");
+
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDataRegion>(".data_region");
+ AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDataRegionEnd>(".end_data_region");
+
+ // Special section directives.
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConst>(".const");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConstData>(".const_data");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConstructor>(".constructor");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveCString>(".cstring");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveData>(".data");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveDestructor>(".destructor");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveDyld>(".dyld");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveFVMLibInit0>(".fvmlib_init0");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveFVMLibInit1>(".fvmlib_init1");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLazySymbolPointers>(".lazy_symbol_pointer");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLiteral16>(".literal16");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLiteral4>(".literal4");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveLiteral8>(".literal8");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveModInitFunc>(".mod_init_func");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveModTermFunc>(".mod_term_func");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveNonLazySymbolPointers>(".non_lazy_symbol_pointer");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCCatClsMeth>(".objc_cat_cls_meth");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCCatInstMeth>(".objc_cat_inst_meth");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCCategory>(".objc_category");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClass>(".objc_class");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClassNames>(".objc_class_names");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClassVars>(".objc_class_vars");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClsMeth>(".objc_cls_meth");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCClsRefs>(".objc_cls_refs");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCInstMeth>(".objc_inst_meth");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCInstanceVars>(".objc_instance_vars");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMessageRefs>(".objc_message_refs");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMetaClass>(".objc_meta_class");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMethVarNames>(".objc_meth_var_names");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCMethVarTypes>(".objc_meth_var_types");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCModuleInfo>(".objc_module_info");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCProtocol>(".objc_protocol");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCSelectorStrs>(".objc_selector_strs");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCStringObject>(".objc_string_object");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveObjCSymbols>(".objc_symbols");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectivePICSymbolStub>(".picsymbol_stub");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveStaticConst>(".static_const");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveStaticData>(".static_data");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveSymbolStub>(".symbol_stub");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveTData>(".tdata");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveText>(".text");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveThreadInitFunc>(".thread_init_func");
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveTLV>(".tlv");
+
+ AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveIdent>(".ident");
+ }
+
+ bool ParseDirectiveDesc(StringRef, SMLoc);
+ bool ParseDirectiveDumpOrLoad(StringRef, SMLoc);
+ bool ParseDirectiveLsym(StringRef, SMLoc);
+ bool ParseDirectiveSection(StringRef, SMLoc);
+ bool ParseDirectivePushSection(StringRef, SMLoc);
+ bool ParseDirectivePopSection(StringRef, SMLoc);
+ bool ParseDirectivePrevious(StringRef, SMLoc);
+ bool ParseDirectiveSecureLogReset(StringRef, SMLoc);
+ bool ParseDirectiveSecureLogUnique(StringRef, SMLoc);
+ bool ParseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
+ bool ParseDirectiveTBSS(StringRef, SMLoc);
+ bool ParseDirectiveZerofill(StringRef, SMLoc);
+ bool ParseDirectiveDataRegion(StringRef, SMLoc);
+ bool ParseDirectiveDataRegionEnd(StringRef, SMLoc);
+
+ // Named Section Directive
+ bool ParseSectionDirectiveConst(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__const");
+ }
+ bool ParseSectionDirectiveStaticConst(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__static_const");
+ }
+ bool ParseSectionDirectiveCString(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__cstring",
+ MCSectionMachO::S_CSTRING_LITERALS);
+ }
+ bool ParseSectionDirectiveLiteral4(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__literal4",
+ MCSectionMachO::S_4BYTE_LITERALS, 4);
+ }
+ bool ParseSectionDirectiveLiteral8(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__literal8",
+ MCSectionMachO::S_8BYTE_LITERALS, 8);
+ }
+ bool ParseSectionDirectiveLiteral16(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__literal16",
+ MCSectionMachO::S_16BYTE_LITERALS, 16);
+ }
+ bool ParseSectionDirectiveConstructor(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__constructor");
+ }
+ bool ParseSectionDirectiveDestructor(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__destructor");
+ }
+ bool ParseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__fvmlib_init0");
+ }
+ bool ParseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__fvmlib_init1");
+ }
+ bool ParseSectionDirectiveSymbolStub(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__symbol_stub",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ // FIXME: Different on PPC and ARM.
+ 0, 16);
+ }
+ bool ParseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT","__picsymbol_stub",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
+ }
+ bool ParseSectionDirectiveData(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__data");
+ }
+ bool ParseSectionDirectiveStaticData(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__static_data");
+ }
+ bool ParseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__nl_symbol_ptr",
+ MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
+ }
+ bool ParseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__la_symbol_ptr",
+ MCSectionMachO::S_LAZY_SYMBOL_POINTERS, 4);
+ }
+ bool ParseSectionDirectiveDyld(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__dyld");
+ }
+ bool ParseSectionDirectiveModInitFunc(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__mod_init_func",
+ MCSectionMachO::S_MOD_INIT_FUNC_POINTERS, 4);
+ }
+ bool ParseSectionDirectiveModTermFunc(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__mod_term_func",
+ MCSectionMachO::S_MOD_TERM_FUNC_POINTERS, 4);
+ }
+ bool ParseSectionDirectiveConstData(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__const");
+ }
+ bool ParseSectionDirectiveObjCClass(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__class",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__meta_class",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__cat_cls_meth",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__cat_inst_meth",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__protocol",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__string_object",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__cls_meth",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__inst_meth",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__cls_refs",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
+ MCSectionMachO::S_LITERAL_POINTERS, 4);
+ }
+ bool ParseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__message_refs",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
+ MCSectionMachO::S_LITERAL_POINTERS, 4);
+ }
+ bool ParseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__symbols",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCCategory(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__category",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__class_vars",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__instance_vars",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__module_info",
+ MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool ParseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__cstring",
+ MCSectionMachO::S_CSTRING_LITERALS);
+ }
+ bool ParseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__cstring",
+ MCSectionMachO::S_CSTRING_LITERALS);
+ }
+ bool ParseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__cstring",
+ MCSectionMachO::S_CSTRING_LITERALS);
+ }
+ bool ParseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
+ return ParseSectionSwitch("__OBJC", "__selector_strs",
+ MCSectionMachO::S_CSTRING_LITERALS);
+ }
+ bool ParseSectionDirectiveTData(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__thread_data",
+ MCSectionMachO::S_THREAD_LOCAL_REGULAR);
+ }
+ bool ParseSectionDirectiveText(StringRef, SMLoc) {
+ return ParseSectionSwitch("__TEXT", "__text",
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
+ }
+ bool ParseSectionDirectiveTLV(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__thread_vars",
+ MCSectionMachO::S_THREAD_LOCAL_VARIABLES);
+ }
+ bool ParseSectionDirectiveIdent(StringRef, SMLoc) {
+ // Darwin silently ignores the .ident directive.
+ getParser().EatToEndOfStatement();
+ return false;
+ }
+ bool ParseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
+ return ParseSectionSwitch("__DATA", "__thread_init",
+ MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
+ }
+
+};
+
+} // end anonymous namespace
+
+bool DarwinAsmParser::ParseSectionSwitch(const char *Segment,
+ const char *Section,
+ unsigned TAA, unsigned Align,
+ unsigned StubSize) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in section switching directive");
+ Lex();
+
+ // FIXME: Arch specific.
+ bool isText = StringRef(Segment) == "__TEXT"; // FIXME: Hack.
+ getStreamer().SwitchSection(getContext().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 issuing the section switch directive will not realign
+ // the section. However, this is arguably more reasonable behavior, and there
+ // is no good reason for someone to intentionally emit incorrectly sized
+ // values into the implicitly aligned sections.
+ if (Align)
+ getStreamer().EmitValueToAlignment(Align, 0, 1, 0);
+
+ return false;
+}
+
+/// ParseDirectiveDesc
+/// ::= .desc identifier , expression
+bool DarwinAsmParser::ParseDirectiveDesc(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.desc' directive");
+ Lex();
+
+ int64_t DescValue;
+ if (getParser().ParseAbsoluteExpression(DescValue))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.desc' directive");
+
+ Lex();
+
+ // Set the n_desc field of this Symbol to this DescValue
+ getStreamer().EmitSymbolDesc(Sym, DescValue);
+
+ return false;
+}
+
+/// ParseDirectiveDumpOrLoad
+/// ::= ( .dump | .load ) "filename"
+bool DarwinAsmParser::ParseDirectiveDumpOrLoad(StringRef Directive,
+ SMLoc IDLoc) {
+ bool IsDump = Directive == ".dump";
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.dump' or '.load' directive");
+
+ Lex();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.dump' or '.load' directive");
+
+ Lex();
+
+ // FIXME: If/when .dump and .load are implemented they will be done in the
+ // the assembly parser and not have any need for an MCStreamer API.
+ if (IsDump)
+ return Warning(IDLoc, "ignoring directive .dump for now");
+ else
+ return Warning(IDLoc, "ignoring directive .load for now");
+}
+
+/// ParseDirectiveLsym
+/// ::= .lsym identifier , expression
+bool DarwinAsmParser::ParseDirectiveLsym(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.lsym' directive");
+ Lex();
+
+ const MCExpr *Value;
+ if (getParser().ParseExpression(Value))
+ return true;
+
+ if (getLexer().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");
+}
+
+/// ParseDirectiveSection:
+/// ::= .section identifier (',' identifier)*
+bool DarwinAsmParser::ParseDirectiveSection(StringRef, SMLoc) {
+ SMLoc Loc = getLexer().getLoc();
+
+ StringRef SectionName;
+ if (getParser().ParseIdentifier(SectionName))
+ return Error(Loc, "expected identifier after '.section' directive");
+
+ // Verify there is a following comma.
+ if (!getLexer().is(AsmToken::Comma))
+ return TokError("unexpected token in '.section' directive");
+
+ std::string SectionSpec = SectionName;
+ SectionSpec += ",";
+
+ // Add all the tokens until the end of the line, ParseSectionSpecifier will
+ // handle this.
+ StringRef EOL = getLexer().LexUntilEndOfStatement();
+ SectionSpec.append(EOL.begin(), EOL.end());
+
+ Lex();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.section' directive");
+ Lex();
+
+
+ StringRef Segment, Section;
+ unsigned StubSize;
+ unsigned TAA;
+ bool TAAParsed;
+ std::string ErrorStr =
+ MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
+ TAA, TAAParsed, StubSize);
+
+ if (!ErrorStr.empty())
+ return Error(Loc, ErrorStr.c_str());
+
+ // FIXME: Arch specific.
+ bool isText = Segment == "__TEXT"; // FIXME: Hack.
+ getStreamer().SwitchSection(getContext().getMachOSection(
+ Segment, Section, TAA, StubSize,
+ isText ? SectionKind::getText()
+ : SectionKind::getDataRel()));
+ return false;
+}
+
+/// ParseDirectivePushSection:
+/// ::= .pushsection identifier (',' identifier)*
+bool DarwinAsmParser::ParseDirectivePushSection(StringRef S, SMLoc Loc) {
+ getStreamer().PushSection();
+
+ if (ParseDirectiveSection(S, Loc)) {
+ getStreamer().PopSection();
+ return true;
+ }
+
+ return false;
+}
+
+/// ParseDirectivePopSection:
+/// ::= .popsection
+bool DarwinAsmParser::ParseDirectivePopSection(StringRef, SMLoc) {
+ if (!getStreamer().PopSection())
+ return TokError(".popsection without corresponding .pushsection");
+ return false;
+}
+
+/// ParseDirectivePrevious:
+/// ::= .previous
+bool DarwinAsmParser::ParseDirectivePrevious(StringRef DirName, SMLoc) {
+ const MCSection *PreviousSection = getStreamer().getPreviousSection();
+ if (PreviousSection == NULL)
+ return TokError(".previous without corresponding .section");
+ getStreamer().SwitchSection(PreviousSection);
+ return false;
+}
+
+/// ParseDirectiveSecureLogUnique
+/// ::= .secure_log_unique ... message ...
+bool DarwinAsmParser::ParseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
+ StringRef LogMessage = getParser().ParseStringToEndOfStatement();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.secure_log_unique' directive");
+
+ if (getContext().getSecureLogUsed() != false)
+ return Error(IDLoc, ".secure_log_unique specified multiple times");
+
+ // Get the secure log path.
+ const char *SecureLogFile = getContext().getSecureLogFile();
+ if (SecureLogFile == NULL)
+ return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
+ "environment variable unset.");
+
+ // Open the secure log file if we haven't already.
+ raw_ostream *OS = getContext().getSecureLog();
+ if (OS == NULL) {
+ std::string Err;
+ OS = new raw_fd_ostream(SecureLogFile, Err, raw_fd_ostream::F_Append);
+ if (!Err.empty()) {
+ delete OS;
+ return Error(IDLoc, Twine("can't open secure log file: ") +
+ SecureLogFile + " (" + Err + ")");
+ }
+ getContext().setSecureLog(OS);
+ }
+
+ // Write the message.
+ int CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
+ *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
+ << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
+ << LogMessage + "\n";
+
+ getContext().setSecureLogUsed(true);
+
+ return false;
+}
+
+/// ParseDirectiveSecureLogReset
+/// ::= .secure_log_reset
+bool DarwinAsmParser::ParseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.secure_log_reset' directive");
+
+ Lex();
+
+ getContext().setSecureLogUsed(false);
+
+ return false;
+}
+
+/// ParseDirectiveSubsectionsViaSymbols
+/// ::= .subsections_via_symbols
+bool DarwinAsmParser::ParseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.subsections_via_symbols' directive");
+
+ Lex();
+
+ getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+
+ return false;
+}
+
+/// ParseDirectiveTBSS
+/// ::= .tbss identifier, size, align
+bool DarwinAsmParser::ParseDirectiveTBSS(StringRef, SMLoc) {
+ SMLoc IDLoc = getLexer().getLoc();
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ Pow2AlignmentLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Pow2Alignment))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.tbss' directive");
+
+ Lex();
+
+ if (Size < 0)
+ return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
+ "zero");
+
+ // FIXME: Diagnose overflow.
+ if (Pow2Alignment < 0)
+ return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
+ "than zero");
+
+ if (!Sym->isUndefined())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
+ "__DATA", "__thread_bss",
+ MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
+ 0, SectionKind::getThreadBSS()),
+ Sym, Size, 1 << Pow2Alignment);
+
+ return false;
+}
+
+/// ParseDirectiveZerofill
+/// ::= .zerofill segname , sectname [, identifier , size_expression [
+/// , align_expression ]]
+bool DarwinAsmParser::ParseDirectiveZerofill(StringRef, SMLoc) {
+ StringRef Segment;
+ if (getParser().ParseIdentifier(Segment))
+ return TokError("expected segment name after '.zerofill' directive");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ StringRef Section;
+ if (getParser().ParseIdentifier(Section))
+ return TokError("expected section name after comma in '.zerofill' "
+ "directive");
+
+ // If this is the end of the line all that was wanted was to create the
+ // the section but with no symbol.
+ if (getLexer().is(AsmToken::EndOfStatement)) {
+ // Create the zerofill section but no symbol
+ getStreamer().EmitZerofill(getContext().getMachOSection(
+ Segment, Section, MCSectionMachO::S_ZEROFILL,
+ 0, SectionKind::getBSS()));
+ return false;
+ }
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ SMLoc IDLoc = getLexer().getLoc();
+ StringRef IDStr;
+ if (getParser().ParseIdentifier(IDStr))
+ return TokError("expected identifier in directive");
+
+ // handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(IDStr);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ Pow2AlignmentLoc = getLexer().getLoc();
+ if (getParser().ParseAbsoluteExpression(Pow2Alignment))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.zerofill' directive");
+
+ Lex();
+
+ if (Size < 0)
+ return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
+ "than zero");
+
+ // NOTE: The alignment in the directive is a power of 2 value, the assembler
+ // may internally end up wanting an alignment in bytes.
+ // FIXME: Diagnose overflow.
+ if (Pow2Alignment < 0)
+ return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
+ "can't be less than zero");
+
+ if (!Sym->isUndefined())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ // Create the zerofill Symbol with Size and Pow2Alignment
+ //
+ // FIXME: Arch specific.
+ getStreamer().EmitZerofill(getContext().getMachOSection(
+ Segment, Section, MCSectionMachO::S_ZEROFILL,
+ 0, SectionKind::getBSS()),
+ Sym, Size, 1 << Pow2Alignment);
+
+ return false;
+}
+
+/// ParseDirectiveDataRegion
+/// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
+bool DarwinAsmParser::ParseDirectiveDataRegion(StringRef, SMLoc) {
+ if (getLexer().is(AsmToken::EndOfStatement)) {
+ Lex();
+ getStreamer().EmitDataRegion(MCDR_DataRegion);
+ return false;
+ }
+ StringRef RegionType;
+ SMLoc Loc = getParser().getTok().getLoc();
+ if (getParser().ParseIdentifier(RegionType))
+ return TokError("expected region type after '.data_region' directive");
+ int Kind = StringSwitch<int>(RegionType)
+ .Case("jt8", MCDR_DataRegionJT8)
+ .Case("jt16", MCDR_DataRegionJT16)
+ .Case("jt32", MCDR_DataRegionJT32)
+ .Default(-1);
+ if (Kind == -1)
+ return Error(Loc, "unknown region type in '.data_region' directive");
+ Lex();
+
+ getStreamer().EmitDataRegion((MCDataRegionType)Kind);
+ return false;
+}
+
+/// ParseDirectiveDataRegionEnd
+/// ::= .end_data_region
+bool DarwinAsmParser::ParseDirectiveDataRegionEnd(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.end_data_region' directive");
+
+ Lex();
+ getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
+ return false;
+}
+
+namespace llvm {
+
+MCAsmParserExtension *createDarwinAsmParser() {
+ return new DarwinAsmParser;
+}
+
+} // end llvm namespace
diff --git a/contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp
new file mode 100644
index 0000000..9316bb1
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp
@@ -0,0 +1,611 @@
+//===- ELFAsmParser.cpp - ELF Assembly Parser -----------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/Support/ELF.h"
+using namespace llvm;
+
+namespace {
+
+class ELFAsmParser : public MCAsmParserExtension {
+ template<bool (ELFAsmParser::*Handler)(StringRef, SMLoc)>
+ void AddDirectiveHandler(StringRef Directive) {
+ getParser().AddDirectiveHandler(this, Directive,
+ HandleDirective<ELFAsmParser, Handler>);
+ }
+
+ bool ParseSectionSwitch(StringRef Section, unsigned Type,
+ unsigned Flags, SectionKind Kind);
+ bool SeenIdent;
+
+public:
+ ELFAsmParser() : SeenIdent(false) {
+ BracketExpressionsSupported = true;
+ }
+
+ virtual void Initialize(MCAsmParser &Parser) {
+ // Call the base implementation.
+ this->MCAsmParserExtension::Initialize(Parser);
+
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveData>(".data");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveText>(".text");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveBSS>(".bss");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveRoData>(".rodata");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveTData>(".tdata");
+ AddDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveTBSS>(".tbss");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseSectionDirectiveDataRel>(".data.rel");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseSectionDirectiveDataRelRo>(".data.rel.ro");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseSectionDirectiveDataRelRoLocal>(".data.rel.ro.local");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseSectionDirectiveEhFrame>(".eh_frame");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveSection>(".section");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseDirectivePushSection>(".pushsection");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectivePopSection>(".popsection");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveSize>(".size");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectivePrevious>(".previous");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveType>(".type");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveIdent>(".ident");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveSymver>(".symver");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveVersion>(".version");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveWeakref>(".weakref");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveSymbolAttribute>(".weak");
+ AddDirectiveHandler<&ELFAsmParser::ParseDirectiveSymbolAttribute>(".local");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseDirectiveSymbolAttribute>(".protected");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseDirectiveSymbolAttribute>(".internal");
+ AddDirectiveHandler<
+ &ELFAsmParser::ParseDirectiveSymbolAttribute>(".hidden");
+ }
+
+ // FIXME: Part of this logic is duplicated in the MCELFStreamer. What is
+ // the best way for us to get access to it?
+ bool ParseSectionDirectiveData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data", ELF::SHT_PROGBITS,
+ ELF::SHF_WRITE |ELF::SHF_ALLOC,
+ SectionKind::getDataRel());
+ }
+ bool ParseSectionDirectiveText(StringRef, SMLoc) {
+ return ParseSectionSwitch(".text", ELF::SHT_PROGBITS,
+ ELF::SHF_EXECINSTR |
+ ELF::SHF_ALLOC, SectionKind::getText());
+ }
+ bool ParseSectionDirectiveBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".bss", ELF::SHT_NOBITS,
+ ELF::SHF_WRITE |
+ ELF::SHF_ALLOC, SectionKind::getBSS());
+ }
+ bool ParseSectionDirectiveRoData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".rodata", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC,
+ SectionKind::getReadOnly());
+ }
+ bool ParseSectionDirectiveTData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".tdata", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_TLS | ELF::SHF_WRITE,
+ SectionKind::getThreadData());
+ }
+ bool ParseSectionDirectiveTBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".tbss", ELF::SHT_NOBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_TLS | ELF::SHF_WRITE,
+ SectionKind::getThreadBSS());
+ }
+ bool ParseSectionDirectiveDataRel(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_WRITE,
+ SectionKind::getDataRel());
+ }
+ bool ParseSectionDirectiveDataRelRo(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel.ro", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRel());
+ }
+ bool ParseSectionDirectiveDataRelRoLocal(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel.ro.local", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRelLocal());
+ }
+ bool ParseSectionDirectiveEhFrame(StringRef, SMLoc) {
+ return ParseSectionSwitch(".eh_frame", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_WRITE,
+ SectionKind::getDataRel());
+ }
+ bool ParseDirectivePushSection(StringRef, SMLoc);
+ bool ParseDirectivePopSection(StringRef, SMLoc);
+ bool ParseDirectiveSection(StringRef, SMLoc);
+ bool ParseDirectiveSize(StringRef, SMLoc);
+ bool ParseDirectivePrevious(StringRef, SMLoc);
+ bool ParseDirectiveType(StringRef, SMLoc);
+ bool ParseDirectiveIdent(StringRef, SMLoc);
+ bool ParseDirectiveSymver(StringRef, SMLoc);
+ bool ParseDirectiveVersion(StringRef, SMLoc);
+ bool ParseDirectiveWeakref(StringRef, SMLoc);
+ bool ParseDirectiveSymbolAttribute(StringRef, SMLoc);
+
+private:
+ bool ParseSectionName(StringRef &SectionName);
+};
+
+}
+
+/// ParseDirectiveSymbolAttribute
+/// ::= { ".local", ".weak", ... } [ identifier ( , identifier )* ]
+bool ELFAsmParser::ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc) {
+ MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Directive)
+ .Case(".weak", MCSA_Weak)
+ .Case(".local", MCSA_Local)
+ .Case(".hidden", MCSA_Hidden)
+ .Case(".internal", MCSA_Internal)
+ .Case(".protected", MCSA_Protected)
+ .Default(MCSA_Invalid);
+ assert(Attr != MCSA_Invalid && "unexpected symbol attribute directive!");
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ StringRef Name;
+
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+bool ELFAsmParser::ParseSectionSwitch(StringRef Section, unsigned Type,
+ unsigned Flags, SectionKind Kind) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in section switching directive");
+ Lex();
+
+ getStreamer().SwitchSection(getContext().getELFSection(
+ Section, Type, Flags, Kind));
+
+ return false;
+}
+
+bool ELFAsmParser::ParseDirectiveSize(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ const MCExpr *Expr;
+ if (getParser().ParseExpression(Expr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ getStreamer().EmitELFSize(Sym, Expr);
+ return false;
+}
+
+bool ELFAsmParser::ParseSectionName(StringRef &SectionName) {
+ // A section name can contain -, so we cannot just use
+ // ParseIdentifier.
+ SMLoc FirstLoc = getLexer().getLoc();
+ unsigned Size = 0;
+
+ if (getLexer().is(AsmToken::String)) {
+ SectionName = getTok().getIdentifier();
+ Lex();
+ return false;
+ }
+
+ for (;;) {
+ StringRef Tmp;
+ unsigned CurSize;
+
+ SMLoc PrevLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Minus)) {
+ CurSize = 1;
+ Lex(); // Consume the "-".
+ } else if (getLexer().is(AsmToken::String)) {
+ CurSize = getTok().getIdentifier().size() + 2;
+ Lex();
+ } else if (getLexer().is(AsmToken::Identifier)) {
+ CurSize = getTok().getIdentifier().size();
+ Lex();
+ } else {
+ break;
+ }
+
+ Size += CurSize;
+ SectionName = StringRef(FirstLoc.getPointer(), Size);
+
+ // Make sure the following token is adjacent.
+ if (PrevLoc.getPointer() + CurSize != getTok().getLoc().getPointer())
+ break;
+ }
+ if (Size == 0)
+ return true;
+
+ return false;
+}
+
+static SectionKind computeSectionKind(unsigned Flags) {
+ if (Flags & ELF::SHF_EXECINSTR)
+ return SectionKind::getText();
+ if (Flags & ELF::SHF_TLS)
+ return SectionKind::getThreadData();
+ return SectionKind::getDataRel();
+}
+
+static int parseSectionFlags(StringRef flagsStr) {
+ int flags = 0;
+
+ for (unsigned i = 0; i < flagsStr.size(); i++) {
+ switch (flagsStr[i]) {
+ case 'a':
+ flags |= ELF::SHF_ALLOC;
+ break;
+ case 'x':
+ flags |= ELF::SHF_EXECINSTR;
+ break;
+ case 'w':
+ flags |= ELF::SHF_WRITE;
+ break;
+ case 'M':
+ flags |= ELF::SHF_MERGE;
+ break;
+ case 'S':
+ flags |= ELF::SHF_STRINGS;
+ break;
+ case 'T':
+ flags |= ELF::SHF_TLS;
+ break;
+ case 'c':
+ flags |= ELF::XCORE_SHF_CP_SECTION;
+ break;
+ case 'd':
+ flags |= ELF::XCORE_SHF_DP_SECTION;
+ break;
+ case 'G':
+ flags |= ELF::SHF_GROUP;
+ break;
+ default:
+ return -1;
+ }
+ }
+
+ return flags;
+}
+
+bool ELFAsmParser::ParseDirectivePushSection(StringRef s, SMLoc loc) {
+ getStreamer().PushSection();
+
+ if (ParseDirectiveSection(s, loc)) {
+ getStreamer().PopSection();
+ return true;
+ }
+
+ return false;
+}
+
+bool ELFAsmParser::ParseDirectivePopSection(StringRef, SMLoc) {
+ if (!getStreamer().PopSection())
+ return TokError(".popsection without corresponding .pushsection");
+ return false;
+}
+
+// FIXME: This is a work in progress.
+bool ELFAsmParser::ParseDirectiveSection(StringRef, SMLoc) {
+ StringRef SectionName;
+
+ if (ParseSectionName(SectionName))
+ return TokError("expected identifier in directive");
+
+ StringRef TypeName;
+ int64_t Size = 0;
+ StringRef GroupName;
+ unsigned Flags = 0;
+
+ // Set the defaults first.
+ if (SectionName == ".fini" || SectionName == ".init" ||
+ SectionName == ".rodata")
+ Flags |= ELF::SHF_ALLOC;
+ if (SectionName == ".fini" || SectionName == ".init")
+ Flags |= ELF::SHF_EXECINSTR;
+
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in directive");
+
+ StringRef FlagsStr = getTok().getStringContents();
+ Lex();
+
+ int extraFlags = parseSectionFlags(FlagsStr);
+ if (extraFlags < 0)
+ return TokError("unknown flag");
+ Flags |= extraFlags;
+
+ bool Mergeable = Flags & ELF::SHF_MERGE;
+ bool Group = Flags & ELF::SHF_GROUP;
+
+ if (getLexer().isNot(AsmToken::Comma)) {
+ if (Mergeable)
+ return TokError("Mergeable section must specify the type");
+ if (Group)
+ return TokError("Group section must specify the type");
+ } else {
+ Lex();
+ if (getLexer().isNot(AsmToken::Percent) && getLexer().isNot(AsmToken::At))
+ return TokError("expected '@' or '%' before type");
+
+ Lex();
+ if (getParser().ParseIdentifier(TypeName))
+ return TokError("expected identifier in directive");
+
+ if (Mergeable) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected the entry size");
+ Lex();
+ if (getParser().ParseAbsoluteExpression(Size))
+ return true;
+ if (Size <= 0)
+ return TokError("entry size must be positive");
+ }
+
+ if (Group) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected group name");
+ Lex();
+ if (getParser().ParseIdentifier(GroupName))
+ return true;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ StringRef Linkage;
+ if (getParser().ParseIdentifier(Linkage))
+ return true;
+ if (Linkage != "comdat")
+ return TokError("Linkage must be 'comdat'");
+ }
+ }
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ unsigned Type = ELF::SHT_PROGBITS;
+
+ if (!TypeName.empty()) {
+ if (TypeName == "init_array")
+ Type = ELF::SHT_INIT_ARRAY;
+ else if (TypeName == "fini_array")
+ Type = ELF::SHT_FINI_ARRAY;
+ else if (TypeName == "preinit_array")
+ Type = ELF::SHT_PREINIT_ARRAY;
+ else if (TypeName == "nobits")
+ Type = ELF::SHT_NOBITS;
+ else if (TypeName == "progbits")
+ Type = ELF::SHT_PROGBITS;
+ else if (TypeName == "note")
+ Type = ELF::SHT_NOTE;
+ else if (TypeName == "unwind")
+ Type = ELF::SHT_X86_64_UNWIND;
+ else
+ return TokError("unknown section type");
+ }
+
+ SectionKind Kind = computeSectionKind(Flags);
+ getStreamer().SwitchSection(getContext().getELFSection(SectionName, Type,
+ Flags, Kind, Size,
+ GroupName));
+ return false;
+}
+
+bool ELFAsmParser::ParseDirectivePrevious(StringRef DirName, SMLoc) {
+ const MCSection *PreviousSection = getStreamer().getPreviousSection();
+ if (PreviousSection == NULL)
+ return TokError(".previous without corresponding .section");
+ getStreamer().SwitchSection(PreviousSection);
+
+ return false;
+}
+
+/// ParseDirectiveELFType
+/// ::= .type identifier , @attribute
+bool ELFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.type' directive");
+ Lex();
+
+ if (getLexer().isNot(AsmToken::Percent) && getLexer().isNot(AsmToken::At))
+ return TokError("expected '@' or '%' before type");
+ Lex();
+
+ StringRef Type;
+ SMLoc TypeLoc;
+
+ TypeLoc = getLexer().getLoc();
+ if (getParser().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)
+ .Case("gnu_unique_object", MCSA_ELF_TypeGnuUniqueObject)
+ .Case("gnu_indirect_function", MCSA_ELF_TypeIndFunction)
+ .Default(MCSA_Invalid);
+
+ if (Attr == MCSA_Invalid)
+ return Error(TypeLoc, "unsupported attribute in '.type' directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.type' directive");
+
+ Lex();
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ return false;
+}
+
+/// ParseDirectiveIdent
+/// ::= .ident string
+bool ELFAsmParser::ParseDirectiveIdent(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("unexpected token in '.ident' directive");
+
+ StringRef Data = getTok().getIdentifier();
+
+ Lex();
+
+ const MCSection *Comment =
+ getContext().getELFSection(".comment", ELF::SHT_PROGBITS,
+ ELF::SHF_MERGE |
+ ELF::SHF_STRINGS,
+ SectionKind::getReadOnly(),
+ 1, "");
+
+ getStreamer().PushSection();
+ getStreamer().SwitchSection(Comment);
+ if (!SeenIdent) {
+ getStreamer().EmitIntValue(0, 1);
+ SeenIdent = true;
+ }
+ getStreamer().EmitBytes(Data, 0);
+ getStreamer().EmitIntValue(0, 1);
+ getStreamer().PopSection();
+ return false;
+}
+
+/// ParseDirectiveSymver
+/// ::= .symver foo, bar2@zed
+bool ELFAsmParser::ParseDirectiveSymver(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected a comma");
+
+ Lex();
+
+ StringRef AliasName;
+ if (getParser().ParseIdentifier(AliasName))
+ return TokError("expected identifier in directive");
+
+ if (AliasName.find('@') == StringRef::npos)
+ return TokError("expected a '@' in the name");
+
+ MCSymbol *Alias = getContext().GetOrCreateSymbol(AliasName);
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+ const MCExpr *Value = MCSymbolRefExpr::Create(Sym, getContext());
+
+ getStreamer().EmitAssignment(Alias, Value);
+ return false;
+}
+
+/// ParseDirectiveVersion
+/// ::= .version string
+bool ELFAsmParser::ParseDirectiveVersion(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("unexpected token in '.version' directive");
+
+ StringRef Data = getTok().getIdentifier();
+
+ Lex();
+
+ const MCSection *Note =
+ getContext().getELFSection(".note", ELF::SHT_NOTE, 0,
+ SectionKind::getReadOnly());
+
+ getStreamer().PushSection();
+ getStreamer().SwitchSection(Note);
+ getStreamer().EmitIntValue(Data.size()+1, 4); // namesz.
+ getStreamer().EmitIntValue(0, 4); // descsz = 0 (no description).
+ getStreamer().EmitIntValue(1, 4); // type = NT_VERSION.
+ getStreamer().EmitBytes(Data, 0); // name.
+ getStreamer().EmitIntValue(0, 1); // terminate the string.
+ getStreamer().EmitValueToAlignment(4); // ensure 4 byte alignment.
+ getStreamer().PopSection();
+ return false;
+}
+
+/// ParseDirectiveWeakref
+/// ::= .weakref foo, bar
+bool ELFAsmParser::ParseDirectiveWeakref(StringRef, SMLoc) {
+ // FIXME: Share code with the other alias building directives.
+
+ StringRef AliasName;
+ if (getParser().ParseIdentifier(AliasName))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected a comma");
+
+ Lex();
+
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Alias = getContext().GetOrCreateSymbol(AliasName);
+
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
+
+ getStreamer().EmitWeakReference(Alias, Sym);
+ return false;
+}
+
+namespace llvm {
+
+MCAsmParserExtension *createELFAsmParser() {
+ return new ELFAsmParser;
+}
+
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp b/contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp
new file mode 100644
index 0000000..3a3ff14
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp
@@ -0,0 +1,31 @@
+//===-- MCAsmLexer.cpp - Abstract Asm Lexer Interface ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/Support/SourceMgr.h"
+
+using namespace llvm;
+
+MCAsmLexer::MCAsmLexer() : CurTok(AsmToken::Error, StringRef()), TokStart(0) {
+}
+
+MCAsmLexer::~MCAsmLexer() {
+}
+
+SMLoc MCAsmLexer::getLoc() const {
+ return SMLoc::getFromPointer(TokStart);
+}
+
+SMLoc AsmToken::getLoc() const {
+ return SMLoc::getFromPointer(Str.data());
+}
+
+SMLoc AsmToken::getEndLoc() const {
+ return SMLoc::getFromPointer(Str.data() + Str.size() - 1);
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp
new file mode 100644
index 0000000..3a825f0
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp
@@ -0,0 +1,48 @@
+//===-- MCAsmParser.cpp - Abstract Asm Parser Interface -------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/ADT/Twine.h"
+using namespace llvm;
+
+MCAsmParser::MCAsmParser() : TargetParser(0), ShowParsedOperands(0) {
+}
+
+MCAsmParser::~MCAsmParser() {
+}
+
+void MCAsmParser::setTargetParser(MCTargetAsmParser &P) {
+ assert(!TargetParser && "Target parser is already initialized!");
+ TargetParser = &P;
+ TargetParser->Initialize(*this);
+}
+
+const AsmToken &MCAsmParser::getTok() {
+ return getLexer().getTok();
+}
+
+bool MCAsmParser::TokError(const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ Error(getLexer().getLoc(), Msg, Ranges);
+ return true;
+}
+
+bool MCAsmParser::ParseExpression(const MCExpr *&Res) {
+ SMLoc L;
+ return ParseExpression(Res, L);
+}
+
+void MCParsedAsmOperand::dump() const {
+ dbgs() << " " << *this;
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp b/contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp
new file mode 100644
index 0000000..3f25a14
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp
@@ -0,0 +1,22 @@
+//===-- MCAsmParserExtension.cpp - Asm Parser Hooks -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+using namespace llvm;
+
+MCAsmParserExtension::MCAsmParserExtension() :
+ BracketExpressionsSupported(false) {
+}
+
+MCAsmParserExtension::~MCAsmParserExtension() {
+}
+
+void MCAsmParserExtension::Initialize(MCAsmParser &Parser) {
+ this->Parser = &Parser;
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp
new file mode 100644
index 0000000..6fb1ba4
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp
@@ -0,0 +1,19 @@
+//===-- MCTargetAsmParser.cpp - Target Assembly Parser ---------------------==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCTargetAsmParser.h"
+using namespace llvm;
+
+MCTargetAsmParser::MCTargetAsmParser()
+ : AvailableFeatures(0)
+{
+}
+
+MCTargetAsmParser::~MCTargetAsmParser() {
+}
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