mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-26 23:29:22 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104467 91177308-0d34-0410-b5e6-96231b3b80d8
1929 lines
59 KiB
C++
1929 lines
59 KiB
C++
//===- 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/MC/MCParser/AsmParser.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCSectionMachO.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
#include "llvm/MC/MCSymbol.h"
|
|
#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/Target/TargetAsmParser.h"
|
|
using namespace llvm;
|
|
|
|
|
|
enum { DEFAULT_ADDRSPACE = 0 };
|
|
|
|
AsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx, MCStreamer &_Out,
|
|
const MCAsmInfo &_MAI)
|
|
: Lexer(_MAI), Ctx(_Ctx), Out(_Out), SrcMgr(_SM), TargetParser(0),
|
|
CurBuffer(0) {
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
|
|
|
|
// Debugging directives.
|
|
AddDirectiveHandler(".file", &AsmParser::ParseDirectiveFile);
|
|
AddDirectiveHandler(".line", &AsmParser::ParseDirectiveLine);
|
|
AddDirectiveHandler(".loc", &AsmParser::ParseDirectiveLoc);
|
|
}
|
|
|
|
|
|
|
|
AsmParser::~AsmParser() {
|
|
}
|
|
|
|
void AsmParser::Warning(SMLoc L, const Twine &Msg) {
|
|
PrintMessage(L, Msg.str(), "warning");
|
|
}
|
|
|
|
bool AsmParser::Error(SMLoc L, const Twine &Msg) {
|
|
PrintMessage(L, Msg.str(), "error");
|
|
return true;
|
|
}
|
|
|
|
bool AsmParser::TokError(const char *Msg) {
|
|
PrintMessage(Lexer.getLoc(), Msg, "error");
|
|
return true;
|
|
}
|
|
|
|
void AsmParser::PrintMessage(SMLoc Loc, const std::string &Msg,
|
|
const char *Type) const {
|
|
SrcMgr.PrintMessage(Loc, Msg, Type);
|
|
}
|
|
|
|
bool AsmParser::EnterIncludeFile(const std::string &Filename) {
|
|
int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc());
|
|
if (NewBuf == -1)
|
|
return true;
|
|
|
|
CurBuffer = NewBuf;
|
|
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
|
|
|
|
return false;
|
|
}
|
|
|
|
const AsmToken &AsmParser::Lex() {
|
|
const AsmToken *tok = &Lexer.Lex();
|
|
|
|
if (tok->is(AsmToken::Eof)) {
|
|
// If this is the end of an included file, pop the parent file off the
|
|
// include stack.
|
|
SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
|
|
if (ParentIncludeLoc != SMLoc()) {
|
|
CurBuffer = SrcMgr.FindBufferContainingLoc(ParentIncludeLoc);
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer),
|
|
ParentIncludeLoc.getPointer());
|
|
tok = &Lexer.Lex();
|
|
}
|
|
}
|
|
|
|
if (tok->is(AsmToken::Error))
|
|
PrintMessage(Lexer.getErrLoc(), Lexer.getErr(), "error");
|
|
|
|
return *tok;
|
|
}
|
|
|
|
bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
|
|
// Create the initial section, if requested.
|
|
//
|
|
// FIXME: Target hook & command line option for initial section.
|
|
if (!NoInitialTextSection)
|
|
Out.SwitchSection(Ctx.getMachOSection("__TEXT", "__text",
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
|
|
0, SectionKind::getText()));
|
|
|
|
// Prime the lexer.
|
|
Lex();
|
|
|
|
bool HadError = false;
|
|
|
|
AsmCond StartingCondState = TheCondState;
|
|
|
|
// While we have input, parse each statement.
|
|
while (Lexer.isNot(AsmToken::Eof)) {
|
|
if (!ParseStatement()) continue;
|
|
|
|
// We had an error, remember it and recover by skipping to the next line.
|
|
HadError = true;
|
|
EatToEndOfStatement();
|
|
}
|
|
|
|
if (TheCondState.TheCond != StartingCondState.TheCond ||
|
|
TheCondState.Ignore != StartingCondState.Ignore)
|
|
return TokError("unmatched .ifs or .elses");
|
|
|
|
// Finalize the output stream if there are no errors and if the client wants
|
|
// us to.
|
|
if (!HadError && !NoFinalize)
|
|
Out.Finish();
|
|
|
|
return HadError;
|
|
}
|
|
|
|
/// 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();
|
|
}
|
|
|
|
|
|
/// 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;
|
|
}
|
|
|
|
MCSymbol *AsmParser::CreateSymbol(StringRef Name) {
|
|
// FIXME: Inline into callers.
|
|
return Ctx.GetOrCreateSymbol(Name);
|
|
}
|
|
|
|
/// ParsePrimaryExpr - Parse a primary expression and return it.
|
|
/// primaryexpr ::= (parenexpr
|
|
/// primaryexpr ::= symbol
|
|
/// primaryexpr ::= number
|
|
/// primaryexpr ::= '.'
|
|
/// primaryexpr ::= ~,+,- primaryexpr
|
|
bool AsmParser::ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
switch (Lexer.getKind()) {
|
|
default:
|
|
return TokError("unknown token in expression");
|
|
case AsmToken::Exclaim:
|
|
Lex(); // Eat the operator.
|
|
if (ParsePrimaryExpr(Res, EndLoc))
|
|
return true;
|
|
Res = MCUnaryExpr::CreateLNot(Res, getContext());
|
|
return false;
|
|
case AsmToken::String:
|
|
case AsmToken::Identifier: {
|
|
// This is a symbol reference.
|
|
std::pair<StringRef, StringRef> Split = getTok().getIdentifier().split('@');
|
|
MCSymbol *Sym = CreateSymbol(Split.first);
|
|
|
|
// Mark the symbol as used in an expression.
|
|
Sym->setUsedInExpr(true);
|
|
|
|
// Lookup the symbol variant if used.
|
|
MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
|
|
if (Split.first.size() != getTok().getIdentifier().size())
|
|
Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
|
|
|
|
EndLoc = Lexer.getLoc();
|
|
Lex(); // Eat identifier.
|
|
|
|
// If this is an absolute variable reference, substitute it now to preserve
|
|
// semantics in the face of reassignment.
|
|
if (Sym->isVariable() && isa<MCConstantExpr>(Sym->getVariableValue())) {
|
|
if (Variant)
|
|
return Error(EndLoc, "unexpected modified on variable reference");
|
|
|
|
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::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::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);
|
|
}
|
|
|
|
/// ParseExpression - Parse an expression and return it.
|
|
///
|
|
/// expr ::= expr +,- expr -> lowest.
|
|
/// expr ::= expr |,^,&,! expr -> middle.
|
|
/// 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;
|
|
|
|
// 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: +, -, ==, !=, <>, <, <=, >, >=
|
|
case AsmToken::Plus:
|
|
Kind = MCBinaryExpr::Add;
|
|
return 2;
|
|
case AsmToken::Minus:
|
|
Kind = MCBinaryExpr::Sub;
|
|
return 2;
|
|
case AsmToken::EqualEqual:
|
|
Kind = MCBinaryExpr::EQ;
|
|
return 2;
|
|
case AsmToken::ExclaimEqual:
|
|
case AsmToken::LessGreater:
|
|
Kind = MCBinaryExpr::NE;
|
|
return 2;
|
|
case AsmToken::Less:
|
|
Kind = MCBinaryExpr::LT;
|
|
return 2;
|
|
case AsmToken::LessEqual:
|
|
Kind = MCBinaryExpr::LTE;
|
|
return 2;
|
|
case AsmToken::Greater:
|
|
Kind = MCBinaryExpr::GT;
|
|
return 2;
|
|
case AsmToken::GreaterEqual:
|
|
Kind = MCBinaryExpr::GTE;
|
|
return 2;
|
|
|
|
// Intermediate Precedence: |, &, ^
|
|
//
|
|
// FIXME: gas seems to support '!' as an infix operator?
|
|
case AsmToken::Pipe:
|
|
Kind = MCBinaryExpr::Or;
|
|
return 3;
|
|
case AsmToken::Caret:
|
|
Kind = MCBinaryExpr::Xor;
|
|
return 3;
|
|
case AsmToken::Amp:
|
|
Kind = MCBinaryExpr::And;
|
|
return 3;
|
|
|
|
// Highest Precedence: *, /, %, <<, >>
|
|
case AsmToken::Star:
|
|
Kind = MCBinaryExpr::Mul;
|
|
return 4;
|
|
case AsmToken::Slash:
|
|
Kind = MCBinaryExpr::Div;
|
|
return 4;
|
|
case AsmToken::Percent:
|
|
Kind = MCBinaryExpr::Mod;
|
|
return 4;
|
|
case AsmToken::LessLess:
|
|
Kind = MCBinaryExpr::Shl;
|
|
return 4;
|
|
case AsmToken::GreaterGreater:
|
|
Kind = MCBinaryExpr::Shr;
|
|
return 4;
|
|
}
|
|
}
|
|
|
|
|
|
/// 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.
|
|
AsmToken ID = getTok();
|
|
SMLoc IDLoc = ID.getLoc();
|
|
StringRef IDVal;
|
|
int64_t LocalLabelVal = -1;
|
|
// GUESS allow an integer followed by a ':' as a directional local label
|
|
if (Lexer.is(AsmToken::Integer)) {
|
|
LocalLabelVal = getTok().getIntVal();
|
|
if (LocalLabelVal < 0) {
|
|
if (!TheCondState.Ignore)
|
|
return TokError("unexpected token at start of statement");
|
|
IDVal = "";
|
|
}
|
|
else {
|
|
IDVal = getTok().getString();
|
|
Lex(); // Consume the integer token to be used as an identifier token.
|
|
if (Lexer.getKind() != AsmToken::Colon) {
|
|
if (!TheCondState.Ignore)
|
|
return TokError("unexpected token at start of statement");
|
|
}
|
|
}
|
|
}
|
|
else if (ParseIdentifier(IDVal)) {
|
|
if (!TheCondState.Ignore)
|
|
return TokError("unexpected token at start of statement");
|
|
IDVal = "";
|
|
}
|
|
|
|
// 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 == ".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: {
|
|
// identifier ':' -> Label.
|
|
Lex();
|
|
|
|
// 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 = CreateSymbol(IDVal);
|
|
else
|
|
Sym = Ctx.CreateDirectionalLocalSymbol(LocalLabelVal);
|
|
if (!Sym->isUndefined() || Sym->isVariable())
|
|
return Error(IDLoc, "invalid symbol redefinition");
|
|
|
|
// Emit the label.
|
|
Out.EmitLabel(Sym);
|
|
|
|
// Consume any end of statement token, if present, to avoid spurious
|
|
// AddBlankLine calls().
|
|
if (Lexer.is(AsmToken::EndOfStatement)) {
|
|
Lex();
|
|
if (Lexer.is(AsmToken::Eof))
|
|
return false;
|
|
}
|
|
|
|
return ParseStatement();
|
|
}
|
|
|
|
case AsmToken::Equal:
|
|
// identifier '=' ... -> assignment statement
|
|
Lex();
|
|
|
|
return ParseAssignment(IDVal);
|
|
|
|
default: // Normal instruction or directive.
|
|
break;
|
|
}
|
|
|
|
// Otherwise, we have a normal instruction or directive.
|
|
if (IDVal[0] == '.') {
|
|
// FIXME: This should be driven based on a hash lookup and callback.
|
|
if (IDVal == ".section")
|
|
return ParseDirectiveDarwinSection();
|
|
if (IDVal == ".text")
|
|
// FIXME: This changes behavior based on the -static flag to the
|
|
// assembler.
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__text",
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
|
|
if (IDVal == ".const")
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__const");
|
|
if (IDVal == ".static_const")
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__static_const");
|
|
if (IDVal == ".cstring")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__cstring",
|
|
MCSectionMachO::S_CSTRING_LITERALS);
|
|
if (IDVal == ".literal4")
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__literal4",
|
|
MCSectionMachO::S_4BYTE_LITERALS,
|
|
4);
|
|
if (IDVal == ".literal8")
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__literal8",
|
|
MCSectionMachO::S_8BYTE_LITERALS,
|
|
8);
|
|
if (IDVal == ".literal16")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__literal16",
|
|
MCSectionMachO::S_16BYTE_LITERALS,
|
|
16);
|
|
if (IDVal == ".constructor")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__constructor");
|
|
if (IDVal == ".destructor")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__destructor");
|
|
if (IDVal == ".fvmlib_init0")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__fvmlib_init0");
|
|
if (IDVal == ".fvmlib_init1")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__fvmlib_init1");
|
|
|
|
// FIXME: The assembler manual claims that this has the self modify code
|
|
// flag, at least on x86-32, but that does not appear to be correct.
|
|
if (IDVal == ".symbol_stub")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__symbol_stub",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
|
|
// FIXME: Different on PPC and ARM.
|
|
0, 16);
|
|
// FIXME: PowerPC only?
|
|
if (IDVal == ".picsymbol_stub")
|
|
return ParseDirectiveSectionSwitch("__TEXT","__picsymbol_stub",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
|
|
0, 26);
|
|
if (IDVal == ".data")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__data");
|
|
if (IDVal == ".static_data")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__static_data");
|
|
|
|
// FIXME: The section names of these two are misspelled in the assembler
|
|
// manual.
|
|
if (IDVal == ".non_lazy_symbol_pointer")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__nl_symbol_ptr",
|
|
MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
|
|
4);
|
|
if (IDVal == ".lazy_symbol_pointer")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__la_symbol_ptr",
|
|
MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
|
|
4);
|
|
|
|
if (IDVal == ".dyld")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__dyld");
|
|
if (IDVal == ".mod_init_func")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__mod_init_func",
|
|
MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
|
|
4);
|
|
if (IDVal == ".mod_term_func")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__mod_term_func",
|
|
MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
|
|
4);
|
|
if (IDVal == ".const_data")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__const");
|
|
|
|
|
|
if (IDVal == ".objc_class")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__class",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_meta_class")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__meta_class",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_cat_cls_meth")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__cat_cls_meth",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_cat_inst_meth")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__cat_inst_meth",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_protocol")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__protocol",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_string_object")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__string_object",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_cls_meth")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__cls_meth",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_inst_meth")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__inst_meth",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_cls_refs")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__cls_refs",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
|
|
MCSectionMachO::S_LITERAL_POINTERS,
|
|
4);
|
|
if (IDVal == ".objc_message_refs")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__message_refs",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP |
|
|
MCSectionMachO::S_LITERAL_POINTERS,
|
|
4);
|
|
if (IDVal == ".objc_symbols")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__symbols",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_category")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__category",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_class_vars")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__class_vars",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_instance_vars")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__instance_vars",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_module_info")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__module_info",
|
|
MCSectionMachO::S_ATTR_NO_DEAD_STRIP);
|
|
if (IDVal == ".objc_class_names")
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
|
|
MCSectionMachO::S_CSTRING_LITERALS);
|
|
if (IDVal == ".objc_meth_var_types")
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
|
|
MCSectionMachO::S_CSTRING_LITERALS);
|
|
if (IDVal == ".objc_meth_var_names")
|
|
return ParseDirectiveSectionSwitch("__TEXT", "__cstring",
|
|
MCSectionMachO::S_CSTRING_LITERALS);
|
|
if (IDVal == ".objc_selector_strs")
|
|
return ParseDirectiveSectionSwitch("__OBJC", "__selector_strs",
|
|
MCSectionMachO::S_CSTRING_LITERALS);
|
|
|
|
if (IDVal == ".tdata")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__thread_data",
|
|
MCSectionMachO::S_THREAD_LOCAL_REGULAR);
|
|
if (IDVal == ".tlv")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__thread_vars",
|
|
MCSectionMachO::S_THREAD_LOCAL_VARIABLES);
|
|
if (IDVal == ".thread_init_func")
|
|
return ParseDirectiveSectionSwitch("__DATA", "__thread_init",
|
|
MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
|
|
|
|
// Assembler features
|
|
if (IDVal == ".set")
|
|
return ParseDirectiveSet();
|
|
|
|
// Data directives
|
|
|
|
if (IDVal == ".ascii")
|
|
return ParseDirectiveAscii(false);
|
|
if (IDVal == ".asciz")
|
|
return ParseDirectiveAscii(true);
|
|
|
|
if (IDVal == ".byte")
|
|
return ParseDirectiveValue(1);
|
|
if (IDVal == ".short")
|
|
return ParseDirectiveValue(2);
|
|
if (IDVal == ".long")
|
|
return ParseDirectiveValue(4);
|
|
if (IDVal == ".quad")
|
|
return ParseDirectiveValue(8);
|
|
|
|
// FIXME: Target hooks for IsPow2.
|
|
if (IDVal == ".align")
|
|
return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
|
|
if (IDVal == ".align32")
|
|
return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
|
|
if (IDVal == ".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")
|
|
return ParseDirectiveSpace();
|
|
|
|
// Symbol attribute directives
|
|
|
|
if (IDVal == ".globl" || IDVal == ".global")
|
|
return ParseDirectiveSymbolAttribute(MCSA_Global);
|
|
if (IDVal == ".hidden")
|
|
return ParseDirectiveSymbolAttribute(MCSA_Hidden);
|
|
if (IDVal == ".indirect_symbol")
|
|
return ParseDirectiveSymbolAttribute(MCSA_IndirectSymbol);
|
|
if (IDVal == ".internal")
|
|
return ParseDirectiveSymbolAttribute(MCSA_Internal);
|
|
if (IDVal == ".lazy_reference")
|
|
return ParseDirectiveSymbolAttribute(MCSA_LazyReference);
|
|
if (IDVal == ".no_dead_strip")
|
|
return ParseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
|
|
if (IDVal == ".private_extern")
|
|
return ParseDirectiveSymbolAttribute(MCSA_PrivateExtern);
|
|
if (IDVal == ".protected")
|
|
return ParseDirectiveSymbolAttribute(MCSA_Protected);
|
|
if (IDVal == ".reference")
|
|
return ParseDirectiveSymbolAttribute(MCSA_Reference);
|
|
if (IDVal == ".type")
|
|
return ParseDirectiveELFType();
|
|
if (IDVal == ".weak")
|
|
return ParseDirectiveSymbolAttribute(MCSA_Weak);
|
|
if (IDVal == ".weak_definition")
|
|
return ParseDirectiveSymbolAttribute(MCSA_WeakDefinition);
|
|
if (IDVal == ".weak_reference")
|
|
return ParseDirectiveSymbolAttribute(MCSA_WeakReference);
|
|
|
|
if (IDVal == ".comm")
|
|
return ParseDirectiveComm(/*IsLocal=*/false);
|
|
if (IDVal == ".lcomm")
|
|
return ParseDirectiveComm(/*IsLocal=*/true);
|
|
if (IDVal == ".zerofill")
|
|
return ParseDirectiveDarwinZerofill();
|
|
if (IDVal == ".desc")
|
|
return ParseDirectiveDarwinSymbolDesc();
|
|
if (IDVal == ".lsym")
|
|
return ParseDirectiveDarwinLsym();
|
|
if (IDVal == ".tbss")
|
|
return ParseDirectiveDarwinTBSS();
|
|
|
|
if (IDVal == ".subsections_via_symbols")
|
|
return ParseDirectiveDarwinSubsectionsViaSymbols();
|
|
if (IDVal == ".abort")
|
|
return ParseDirectiveAbort();
|
|
if (IDVal == ".include")
|
|
return ParseDirectiveInclude();
|
|
if (IDVal == ".dump")
|
|
return ParseDirectiveDarwinDumpOrLoad(IDLoc, /*IsDump=*/true);
|
|
if (IDVal == ".load")
|
|
return ParseDirectiveDarwinDumpOrLoad(IDLoc, /*IsLoad=*/false);
|
|
|
|
// Look up the handler in the handler table,
|
|
bool(AsmParser::*Handler)(StringRef, SMLoc) = DirectiveMap[IDVal];
|
|
if (Handler)
|
|
return (this->*Handler)(IDVal, IDLoc);
|
|
|
|
// Target hook for parsing target specific directives.
|
|
if (!getTargetParser().ParseDirective(ID))
|
|
return false;
|
|
|
|
Warning(IDLoc, "ignoring directive for now");
|
|
EatToEndOfStatement();
|
|
return false;
|
|
}
|
|
|
|
// Canonicalize the opcode to lower case.
|
|
SmallString<128> Opcode;
|
|
for (unsigned i = 0, e = IDVal.size(); i != e; ++i)
|
|
Opcode.push_back(tolower(IDVal[i]));
|
|
|
|
SmallVector<MCParsedAsmOperand*, 8> ParsedOperands;
|
|
bool HadError = getTargetParser().ParseInstruction(Opcode.str(), IDLoc,
|
|
ParsedOperands);
|
|
if (!HadError && Lexer.isNot(AsmToken::EndOfStatement))
|
|
HadError = TokError("unexpected token in argument list");
|
|
|
|
// If parsing succeeded, match the instruction.
|
|
if (!HadError) {
|
|
MCInst Inst;
|
|
if (!getTargetParser().MatchInstruction(ParsedOperands, Inst)) {
|
|
// Emit the instruction on success.
|
|
Out.EmitInstruction(Inst);
|
|
} else {
|
|
// Otherwise emit a diagnostic about the match failure and set the error
|
|
// flag.
|
|
//
|
|
// FIXME: We should give nicer diagnostics about the exact failure.
|
|
Error(IDLoc, "unrecognized instruction");
|
|
HadError = true;
|
|
}
|
|
}
|
|
|
|
// If there was no error, consume the end-of-statement token. Otherwise this
|
|
// will be done by our caller.
|
|
if (!HadError)
|
|
Lex();
|
|
|
|
// Free any parsed operands.
|
|
for (unsigned i = 0, e = ParsedOperands.size(); i != e; ++i)
|
|
delete ParsedOperands[i];
|
|
|
|
return HadError;
|
|
}
|
|
|
|
bool AsmParser::ParseAssignment(const StringRef &Name) {
|
|
// FIXME: Use better location, we should use proper tokens.
|
|
SMLoc EqualLoc = Lexer.getLoc();
|
|
|
|
const MCExpr *Value;
|
|
SMLoc StartLoc = Lexer.getLoc();
|
|
if (ParseExpression(Value))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in assignment");
|
|
|
|
// 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 (Sym->isUndefined() && !Sym->isUsedInExpr())
|
|
; // Allow redefinitions of undefined symbols only used in directives.
|
|
else if (!Sym->isUndefined() && !Sym->isAbsolute())
|
|
return Error(EqualLoc, "redefinition of '" + Name + "'");
|
|
else if (!Sym->isVariable())
|
|
return Error(EqualLoc, "invalid assignment to '" + Name + "'");
|
|
else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
|
|
return Error(EqualLoc, "invalid reassignment of non-absolute variable '" +
|
|
Name + "'");
|
|
} else
|
|
Sym = CreateSymbol(Name);
|
|
|
|
// FIXME: Handle '.'.
|
|
|
|
Sym->setUsedInExpr(true);
|
|
|
|
// Do the assignment.
|
|
Out.EmitAssignment(Sym, Value);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseIdentifier:
|
|
/// ::= identifier
|
|
/// ::= string
|
|
bool AsmParser::ParseIdentifier(StringRef &Res) {
|
|
if (Lexer.isNot(AsmToken::Identifier) &&
|
|
Lexer.isNot(AsmToken::String))
|
|
return true;
|
|
|
|
Res = getTok().getIdentifier();
|
|
|
|
Lex(); // Consume the identifier token.
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveSet:
|
|
/// ::= .set identifier ',' expression
|
|
bool AsmParser::ParseDirectiveSet() {
|
|
StringRef Name;
|
|
|
|
if (ParseIdentifier(Name))
|
|
return TokError("expected identifier after '.set' directive");
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.set'");
|
|
Lex();
|
|
|
|
return ParseAssignment(Name);
|
|
}
|
|
|
|
/// ParseDirectiveSection:
|
|
/// ::= .section identifier (',' identifier)*
|
|
/// FIXME: This should actually parse out the segment, section, attributes and
|
|
/// sizeof_stub fields.
|
|
bool AsmParser::ParseDirectiveDarwinSection() {
|
|
SMLoc Loc = Lexer.getLoc();
|
|
|
|
StringRef SectionName;
|
|
if (ParseIdentifier(SectionName))
|
|
return Error(Loc, "expected identifier after '.section' directive");
|
|
|
|
// Verify there is a following comma.
|
|
if (!Lexer.is(AsmToken::Comma))
|
|
return TokError("unexpected token in '.section' directive");
|
|
|
|
std::string SectionSpec = SectionName;
|
|
SectionSpec += ",";
|
|
|
|
// Add all the tokens until the end of the line, ParseSectionSpecifier will
|
|
// handle this.
|
|
StringRef EOL = Lexer.LexUntilEndOfStatement();
|
|
SectionSpec.append(EOL.begin(), EOL.end());
|
|
|
|
Lex();
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.section' directive");
|
|
Lex();
|
|
|
|
|
|
StringRef Segment, Section;
|
|
unsigned TAA, StubSize;
|
|
std::string ErrorStr =
|
|
MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
|
|
TAA, StubSize);
|
|
|
|
if (!ErrorStr.empty())
|
|
return Error(Loc, ErrorStr.c_str());
|
|
|
|
// FIXME: Arch specific.
|
|
bool isText = Segment == "__TEXT"; // FIXME: Hack.
|
|
Out.SwitchSection(Ctx.getMachOSection(Segment, Section, TAA, StubSize,
|
|
isText ? SectionKind::getText()
|
|
: SectionKind::getDataRel()));
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveSectionSwitch -
|
|
bool AsmParser::ParseDirectiveSectionSwitch(const char *Segment,
|
|
const char *Section,
|
|
unsigned TAA, unsigned Align,
|
|
unsigned StubSize) {
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in section switching directive");
|
|
Lex();
|
|
|
|
// FIXME: Arch specific.
|
|
bool isText = StringRef(Segment) == "__TEXT"; // FIXME: Hack.
|
|
Out.SwitchSection(Ctx.getMachOSection(Segment, Section, TAA, StubSize,
|
|
isText ? SectionKind::getText()
|
|
: SectionKind::getDataRel()));
|
|
|
|
// Set the implicit alignment, if any.
|
|
//
|
|
// FIXME: This isn't really what 'as' does; I think it just uses the implicit
|
|
// alignment on the section (e.g., if one manually inserts bytes into the
|
|
// section, then just issueing the section switch directive will not realign
|
|
// the section. However, this is arguably more reasonable behavior, and there
|
|
// is no good reason for someone to intentionally emit incorrectly sized
|
|
// values into the implicitly aligned sections.
|
|
if (Align)
|
|
Out.EmitValueToAlignment(Align, 0, 1, 0);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::ParseEscapedString(std::string &Data) {
|
|
assert(Lexer.is(AsmToken::String) && "Unexpected current token!");
|
|
|
|
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" )* ]
|
|
bool AsmParser::ParseDirectiveAscii(bool ZeroTerminated) {
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
for (;;) {
|
|
if (Lexer.isNot(AsmToken::String))
|
|
return TokError("expected string in '.ascii' or '.asciz' directive");
|
|
|
|
std::string Data;
|
|
if (ParseEscapedString(Data))
|
|
return true;
|
|
|
|
Out.EmitBytes(Data, DEFAULT_ADDRSPACE);
|
|
if (ZeroTerminated)
|
|
Out.EmitBytes(StringRef("\0", 1), DEFAULT_ADDRSPACE);
|
|
|
|
Lex();
|
|
|
|
if (Lexer.is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.ascii' or '.asciz' directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveValue
|
|
/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
|
|
bool AsmParser::ParseDirectiveValue(unsigned Size) {
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
for (;;) {
|
|
const MCExpr *Value;
|
|
SMLoc ATTRIBUTE_UNUSED StartLoc = Lexer.getLoc();
|
|
if (ParseExpression(Value))
|
|
return true;
|
|
|
|
// Special case constant expressions to match code generator.
|
|
if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value))
|
|
Out.EmitIntValue(MCE->getValue(), Size, DEFAULT_ADDRSPACE);
|
|
else
|
|
Out.EmitValue(Value, Size, DEFAULT_ADDRSPACE);
|
|
|
|
if (Lexer.is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
// FIXME: Improve diagnostic.
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveSpace
|
|
/// ::= .space expression [ , expression ]
|
|
bool AsmParser::ParseDirectiveSpace() {
|
|
int64_t NumBytes;
|
|
if (ParseAbsoluteExpression(NumBytes))
|
|
return true;
|
|
|
|
int64_t FillExpr = 0;
|
|
bool HasFillExpr = false;
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.space' directive");
|
|
Lex();
|
|
|
|
if (ParseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
|
|
HasFillExpr = true;
|
|
|
|
if (Lexer.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.
|
|
Out.EmitFill(NumBytes, FillExpr, DEFAULT_ADDRSPACE);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveFill
|
|
/// ::= .fill expression , expression , expression
|
|
bool AsmParser::ParseDirectiveFill() {
|
|
int64_t NumValues;
|
|
if (ParseAbsoluteExpression(NumValues))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.fill' directive");
|
|
Lex();
|
|
|
|
int64_t FillSize;
|
|
if (ParseAbsoluteExpression(FillSize))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.fill' directive");
|
|
Lex();
|
|
|
|
int64_t FillExpr;
|
|
if (ParseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
|
|
if (Lexer.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)
|
|
Out.EmitIntValue(FillExpr, FillSize, DEFAULT_ADDRSPACE);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveOrg
|
|
/// ::= .org expression [ , expression ]
|
|
bool AsmParser::ParseDirectiveOrg() {
|
|
const MCExpr *Offset;
|
|
SMLoc StartLoc = Lexer.getLoc();
|
|
if (ParseExpression(Offset))
|
|
return true;
|
|
|
|
// Parse optional fill expression.
|
|
int64_t FillExpr = 0;
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.org' directive");
|
|
Lex();
|
|
|
|
if (ParseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.org' directive");
|
|
}
|
|
|
|
Lex();
|
|
|
|
// FIXME: Only limited forms of relocatable expressions are accepted here, it
|
|
// has to be relative to the current section.
|
|
Out.EmitValueToOffset(Offset, FillExpr);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveAlign
|
|
/// ::= {.align, ...} expression [ , expression [ , expression ]]
|
|
bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
|
|
SMLoc AlignmentLoc = Lexer.getLoc();
|
|
int64_t Alignment;
|
|
if (ParseAbsoluteExpression(Alignment))
|
|
return true;
|
|
|
|
SMLoc MaxBytesLoc;
|
|
bool HasFillExpr = false;
|
|
int64_t FillExpr = 0;
|
|
int64_t MaxBytesToFill = 0;
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
// The fill expression can be omitted while specifying a maximum number of
|
|
// alignment bytes, e.g:
|
|
// .align 3,,4
|
|
if (Lexer.isNot(AsmToken::Comma)) {
|
|
HasFillExpr = true;
|
|
if (ParseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
MaxBytesLoc = Lexer.getLoc();
|
|
if (ParseAbsoluteExpression(MaxBytesToFill))
|
|
return true;
|
|
|
|
if (Lexer.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.
|
|
//
|
|
// FIXME: This should be using a target hook.
|
|
bool UseCodeAlign = false;
|
|
if (const MCSectionMachO *S = dyn_cast<MCSectionMachO>(
|
|
Out.getCurrentSection()))
|
|
UseCodeAlign = S->hasAttribute(MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS);
|
|
if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
|
|
ValueSize == 1 && UseCodeAlign) {
|
|
Out.EmitCodeAlignment(Alignment, MaxBytesToFill);
|
|
} else {
|
|
// FIXME: Target specific behavior about how the "extra" bytes are filled.
|
|
Out.EmitValueToAlignment(Alignment, FillExpr, ValueSize, MaxBytesToFill);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveSymbolAttribute
|
|
/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
|
|
bool AsmParser::ParseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
for (;;) {
|
|
StringRef Name;
|
|
|
|
if (ParseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
MCSymbol *Sym = CreateSymbol(Name);
|
|
|
|
Out.EmitSymbolAttribute(Sym, Attr);
|
|
|
|
if (Lexer.is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveELFType
|
|
/// ::= .type identifier , @attribute
|
|
bool AsmParser::ParseDirectiveELFType() {
|
|
StringRef Name;
|
|
if (ParseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
// Handle the identifier as the key symbol.
|
|
MCSymbol *Sym = CreateSymbol(Name);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.type' directive");
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::At))
|
|
return TokError("expected '@' before type");
|
|
Lex();
|
|
|
|
StringRef Type;
|
|
SMLoc TypeLoc;
|
|
|
|
TypeLoc = Lexer.getLoc();
|
|
if (ParseIdentifier(Type))
|
|
return TokError("expected symbol type in directive");
|
|
|
|
MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Type)
|
|
.Case("function", MCSA_ELF_TypeFunction)
|
|
.Case("object", MCSA_ELF_TypeObject)
|
|
.Case("tls_object", MCSA_ELF_TypeTLS)
|
|
.Case("common", MCSA_ELF_TypeCommon)
|
|
.Case("notype", MCSA_ELF_TypeNoType)
|
|
.Default(MCSA_Invalid);
|
|
|
|
if (Attr == MCSA_Invalid)
|
|
return Error(TypeLoc, "unsupported attribute in '.type' directive");
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.type' directive");
|
|
|
|
Lex();
|
|
|
|
Out.EmitSymbolAttribute(Sym, Attr);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveDarwinSymbolDesc
|
|
/// ::= .desc identifier , expression
|
|
bool AsmParser::ParseDirectiveDarwinSymbolDesc() {
|
|
StringRef Name;
|
|
if (ParseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
// Handle the identifier as the key symbol.
|
|
MCSymbol *Sym = CreateSymbol(Name);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.desc' directive");
|
|
Lex();
|
|
|
|
SMLoc DescLoc = Lexer.getLoc();
|
|
int64_t DescValue;
|
|
if (ParseAbsoluteExpression(DescValue))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.desc' directive");
|
|
|
|
Lex();
|
|
|
|
// Set the n_desc field of this Symbol to this DescValue
|
|
Out.EmitSymbolDesc(Sym, DescValue);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveComm
|
|
/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
|
|
bool AsmParser::ParseDirectiveComm(bool IsLocal) {
|
|
SMLoc IDLoc = Lexer.getLoc();
|
|
StringRef Name;
|
|
if (ParseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
// Handle the identifier as the key symbol.
|
|
MCSymbol *Sym = CreateSymbol(Name);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
int64_t Size;
|
|
SMLoc SizeLoc = Lexer.getLoc();
|
|
if (ParseAbsoluteExpression(Size))
|
|
return true;
|
|
|
|
int64_t Pow2Alignment = 0;
|
|
SMLoc Pow2AlignmentLoc;
|
|
if (Lexer.is(AsmToken::Comma)) {
|
|
Lex();
|
|
Pow2AlignmentLoc = Lexer.getLoc();
|
|
if (ParseAbsoluteExpression(Pow2Alignment))
|
|
return true;
|
|
|
|
// If 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 (Lexer.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) {
|
|
Out.EmitZerofill(Ctx.getMachOSection("__DATA", "__bss",
|
|
MCSectionMachO::S_ZEROFILL, 0,
|
|
SectionKind::getBSS()),
|
|
Sym, Size, 1 << Pow2Alignment);
|
|
return false;
|
|
}
|
|
|
|
Out.EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveDarwinZerofill
|
|
/// ::= .zerofill segname , sectname [, identifier , size_expression [
|
|
/// , align_expression ]]
|
|
bool AsmParser::ParseDirectiveDarwinZerofill() {
|
|
StringRef Segment;
|
|
if (ParseIdentifier(Segment))
|
|
return TokError("expected segment name after '.zerofill' directive");
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
StringRef Section;
|
|
if (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 (Lexer.is(AsmToken::EndOfStatement)) {
|
|
// Create the zerofill section but no symbol
|
|
Out.EmitZerofill(Ctx.getMachOSection(Segment, Section,
|
|
MCSectionMachO::S_ZEROFILL, 0,
|
|
SectionKind::getBSS()));
|
|
return false;
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
SMLoc IDLoc = Lexer.getLoc();
|
|
StringRef IDStr;
|
|
if (ParseIdentifier(IDStr))
|
|
return TokError("expected identifier in directive");
|
|
|
|
// handle the identifier as the key symbol.
|
|
MCSymbol *Sym = CreateSymbol(IDStr);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
int64_t Size;
|
|
SMLoc SizeLoc = Lexer.getLoc();
|
|
if (ParseAbsoluteExpression(Size))
|
|
return true;
|
|
|
|
int64_t Pow2Alignment = 0;
|
|
SMLoc Pow2AlignmentLoc;
|
|
if (Lexer.is(AsmToken::Comma)) {
|
|
Lex();
|
|
Pow2AlignmentLoc = Lexer.getLoc();
|
|
if (ParseAbsoluteExpression(Pow2Alignment))
|
|
return true;
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.zerofill' directive");
|
|
|
|
Lex();
|
|
|
|
if (Size < 0)
|
|
return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
|
|
"than zero");
|
|
|
|
// NOTE: The alignment in the directive is a power of 2 value, the 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.
|
|
Out.EmitZerofill(Ctx.getMachOSection(Segment, Section,
|
|
MCSectionMachO::S_ZEROFILL, 0,
|
|
SectionKind::getBSS()),
|
|
Sym, Size, 1 << Pow2Alignment);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveDarwinTBSS
|
|
/// ::= .tbss identifier, size, align
|
|
bool AsmParser::ParseDirectiveDarwinTBSS() {
|
|
SMLoc IDLoc = Lexer.getLoc();
|
|
StringRef Name;
|
|
if (ParseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
// Handle the identifier as the key symbol.
|
|
MCSymbol *Sym = CreateSymbol(Name);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
int64_t Size;
|
|
SMLoc SizeLoc = Lexer.getLoc();
|
|
if (ParseAbsoluteExpression(Size))
|
|
return true;
|
|
|
|
int64_t Pow2Alignment = 0;
|
|
SMLoc Pow2AlignmentLoc;
|
|
if (Lexer.is(AsmToken::Comma)) {
|
|
Lex();
|
|
Pow2AlignmentLoc = Lexer.getLoc();
|
|
if (ParseAbsoluteExpression(Pow2Alignment))
|
|
return true;
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.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");
|
|
|
|
Out.EmitTBSSSymbol(Ctx.getMachOSection("__DATA", "__thread_bss",
|
|
MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
|
|
0, SectionKind::getThreadBSS()),
|
|
Sym, Size, 1 << Pow2Alignment);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveDarwinSubsectionsViaSymbols
|
|
/// ::= .subsections_via_symbols
|
|
bool AsmParser::ParseDirectiveDarwinSubsectionsViaSymbols() {
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.subsections_via_symbols' directive");
|
|
|
|
Lex();
|
|
|
|
Out.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveAbort
|
|
/// ::= .abort [ "abort_string" ]
|
|
bool AsmParser::ParseDirectiveAbort() {
|
|
// FIXME: Use loc from directive.
|
|
SMLoc Loc = Lexer.getLoc();
|
|
|
|
StringRef Str = "";
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::String))
|
|
return TokError("expected string in '.abort' directive");
|
|
|
|
Str = getTok().getString();
|
|
|
|
Lex();
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.abort' directive");
|
|
|
|
Lex();
|
|
|
|
// FIXME: Handle here.
|
|
if (Str.empty())
|
|
Error(Loc, ".abort detected. Assembly stopping.");
|
|
else
|
|
Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveLsym
|
|
/// ::= .lsym identifier , expression
|
|
bool AsmParser::ParseDirectiveDarwinLsym() {
|
|
StringRef Name;
|
|
if (ParseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
// Handle the identifier as the key symbol.
|
|
MCSymbol *Sym = CreateSymbol(Name);
|
|
|
|
if (Lexer.isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in '.lsym' directive");
|
|
Lex();
|
|
|
|
const MCExpr *Value;
|
|
SMLoc StartLoc = Lexer.getLoc();
|
|
if (ParseExpression(Value))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.lsym' directive");
|
|
|
|
Lex();
|
|
|
|
// We don't currently support this directive.
|
|
//
|
|
// FIXME: Diagnostic location!
|
|
(void) Sym;
|
|
return TokError("directive '.lsym' is unsupported");
|
|
}
|
|
|
|
/// ParseDirectiveInclude
|
|
/// ::= .include "filename"
|
|
bool AsmParser::ParseDirectiveInclude() {
|
|
if (Lexer.isNot(AsmToken::String))
|
|
return TokError("expected string in '.include' directive");
|
|
|
|
std::string Filename = getTok().getString();
|
|
SMLoc IncludeLoc = Lexer.getLoc();
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.include' directive");
|
|
|
|
// Strip the quotes.
|
|
Filename = Filename.substr(1, Filename.size()-2);
|
|
|
|
// Attempt to switch the lexer to the included file before consuming the end
|
|
// of statement to avoid losing it when we switch.
|
|
if (EnterIncludeFile(Filename)) {
|
|
PrintMessage(IncludeLoc,
|
|
"Could not find include file '" + Filename + "'",
|
|
"error");
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveDarwinDumpOrLoad
|
|
/// ::= ( .dump | .load ) "filename"
|
|
bool AsmParser::ParseDirectiveDarwinDumpOrLoad(SMLoc IDLoc, bool IsDump) {
|
|
if (Lexer.isNot(AsmToken::String))
|
|
return TokError("expected string in '.dump' or '.load' directive");
|
|
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.dump' or '.load' directive");
|
|
|
|
Lex();
|
|
|
|
// FIXME: If/when .dump and .load are implemented they will be done in the
|
|
// the assembly parser and not have any need for an MCStreamer API.
|
|
if (IsDump)
|
|
Warning(IDLoc, "ignoring directive .dump for now");
|
|
else
|
|
Warning(IDLoc, "ignoring directive .load for now");
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveIf
|
|
/// ::= .if expression
|
|
bool AsmParser::ParseDirectiveIf(SMLoc DirectiveLoc) {
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
if(TheCondState.Ignore) {
|
|
EatToEndOfStatement();
|
|
}
|
|
else {
|
|
int64_t ExprValue;
|
|
if (ParseAbsoluteExpression(ExprValue))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.if' directive");
|
|
|
|
Lex();
|
|
|
|
TheCondState.CondMet = ExprValue;
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveElseIf
|
|
/// ::= .elseif expression
|
|
bool AsmParser::ParseDirectiveElseIf(SMLoc DirectiveLoc) {
|
|
if (TheCondState.TheCond != AsmCond::IfCond &&
|
|
TheCondState.TheCond != AsmCond::ElseIfCond)
|
|
Error(DirectiveLoc, "Encountered a .elseif that doesn't follow a .if or "
|
|
" an .elseif");
|
|
TheCondState.TheCond = AsmCond::ElseIfCond;
|
|
|
|
bool LastIgnoreState = false;
|
|
if (!TheCondStack.empty())
|
|
LastIgnoreState = TheCondStack.back().Ignore;
|
|
if (LastIgnoreState || TheCondState.CondMet) {
|
|
TheCondState.Ignore = true;
|
|
EatToEndOfStatement();
|
|
}
|
|
else {
|
|
int64_t ExprValue;
|
|
if (ParseAbsoluteExpression(ExprValue))
|
|
return true;
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.elseif' directive");
|
|
|
|
Lex();
|
|
TheCondState.CondMet = ExprValue;
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveElse
|
|
/// ::= .else
|
|
bool AsmParser::ParseDirectiveElse(SMLoc DirectiveLoc) {
|
|
if (Lexer.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 (Lexer.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] string
|
|
bool AsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
|
|
// FIXME: I'm not sure what this is.
|
|
int64_t FileNumber = -1;
|
|
if (Lexer.is(AsmToken::Integer)) {
|
|
FileNumber = getTok().getIntVal();
|
|
Lex();
|
|
|
|
if (FileNumber < 1)
|
|
return TokError("file number less than one");
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::String))
|
|
return TokError("unexpected token in '.file' directive");
|
|
|
|
StringRef Filename = getTok().getString();
|
|
Filename = Filename.substr(1, Filename.size()-2);
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.file' directive");
|
|
|
|
if (FileNumber == -1)
|
|
Out.EmitFileDirective(Filename);
|
|
else
|
|
Out.EmitDwarfFileDirective(FileNumber, Filename);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveLine
|
|
/// ::= .line [number]
|
|
bool AsmParser::ParseDirectiveLine(StringRef, SMLoc DirectiveLoc) {
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::Integer))
|
|
return TokError("unexpected token in '.line' directive");
|
|
|
|
int64_t LineNumber = getTok().getIntVal();
|
|
(void) LineNumber;
|
|
Lex();
|
|
|
|
// FIXME: Do something with the .line.
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.file' directive");
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
/// ParseDirectiveLoc
|
|
/// ::= .loc number [number [number]]
|
|
bool AsmParser::ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc) {
|
|
if (Lexer.isNot(AsmToken::Integer))
|
|
return TokError("unexpected token in '.loc' directive");
|
|
|
|
// FIXME: What are these fields?
|
|
int64_t FileNumber = getTok().getIntVal();
|
|
(void) FileNumber;
|
|
// FIXME: Validate file.
|
|
|
|
Lex();
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::Integer))
|
|
return TokError("unexpected token in '.loc' directive");
|
|
|
|
int64_t Param2 = getTok().getIntVal();
|
|
(void) Param2;
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::Integer))
|
|
return TokError("unexpected token in '.loc' directive");
|
|
|
|
int64_t Param3 = getTok().getIntVal();
|
|
(void) Param3;
|
|
Lex();
|
|
|
|
// FIXME: Do something with the .loc.
|
|
}
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '.file' directive");
|
|
|
|
return false;
|
|
}
|
|
|