aboutsummaryrefslogtreecommitdiff
path: root/lib/MC/MCParser/AsmParser.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/MC/MCParser/AsmParser.cpp')
-rw-r--r--lib/MC/MCParser/AsmParser.cpp277
1 files changed, 229 insertions, 48 deletions
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 16487579abfc..2d61cac62585 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -14,7 +14,6 @@
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
@@ -30,6 +29,7 @@
#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"
@@ -122,6 +122,9 @@ private:
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);
@@ -143,9 +146,20 @@ public:
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);
- virtual bool Error(SMLoc L, const Twine &Msg);
+ 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();
@@ -171,14 +185,17 @@ private:
void HandleMacroExit();
void PrintMacroInstantiations();
- void PrintMessage(SMLoc Loc, const Twine &Msg, const char *Type,
- bool ShowLine = true) const {
- SrcMgr.PrintMessage(Loc, Msg, Type, ShowLine);
+ 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
@@ -225,6 +242,7 @@ private:
bool ParseDirectiveAbort(); // ".abort"
bool ParseDirectiveInclude(); // ".include"
+ bool ParseDirectiveIncbin(); // ".incbin"
bool ParseDirectiveIf(SMLoc DirectiveLoc); // ".if"
// ".ifdef" or ".ifndef", depending on expect_defined
@@ -295,6 +313,12 @@ public:
&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>(
@@ -328,6 +352,9 @@ public:
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);
@@ -352,7 +379,8 @@ 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) {
+ CurBuffer(0), MacrosEnabled(true), CppHashLineNumber(0),
+ AssemblerDialect(~0U) {
// Save the old handler.
SavedDiagHandler = SrcMgr.getDiagHandler();
SavedDiagContext = SrcMgr.getDiagContext();
@@ -395,21 +423,21 @@ void AsmParser::PrintMacroInstantiations() {
// Print the active macro instantiation stack.
for (std::vector<MacroInstantiation*>::const_reverse_iterator
it = ActiveMacros.rbegin(), ie = ActiveMacros.rend(); it != ie; ++it)
- PrintMessage((*it)->InstantiationLoc, "while in macro instantiation",
- "note");
+ PrintMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
+ "while in macro instantiation");
}
-bool AsmParser::Warning(SMLoc L, const Twine &Msg) {
+bool AsmParser::Warning(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
if (FatalAssemblerWarnings)
- return Error(L, Msg);
- PrintMessage(L, Msg, "warning");
+ return Error(L, Msg, Ranges);
+ PrintMessage(L, SourceMgr::DK_Warning, Msg, Ranges);
PrintMacroInstantiations();
return false;
}
-bool AsmParser::Error(SMLoc L, const Twine &Msg) {
+bool AsmParser::Error(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
HadError = true;
- PrintMessage(L, Msg, "error");
+ PrintMessage(L, SourceMgr::DK_Error, Msg, Ranges);
PrintMacroInstantiations();
return true;
}
@@ -427,6 +455,21 @@ bool AsmParser::EnterIncludeFile(const std::string &Filename) {
return false;
}
+/// Process the specified .incbin file by seaching for it in the include paths
+/// then just emiting 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());
@@ -462,6 +505,17 @@ bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
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;
@@ -501,8 +555,9 @@ bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
// 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(), "assembler local symbol '" +
- Sym->getName() + "' not defined", "error", false);
+ PrintMessage(getLexer().getLoc(), SourceMgr::DK_Error,
+ "assembler local symbol '" + Sym->getName() +
+ "' not defined");
}
}
@@ -749,8 +804,7 @@ AsmParser::ApplyModifierToExpr(const MCExpr *E,
}
}
- assert(0 && "Invalid expression kind!");
- return 0;
+ llvm_unreachable("Invalid expression kind!");
}
/// ParseExpression - Parse an expression and return it.
@@ -787,7 +841,6 @@ bool AsmParser::ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
if (!ModifiedRes) {
return TokError("invalid modifier '" + getTok().getIdentifier() +
"' (no symbols present)");
- return true;
}
Res = ModifiedRes;
@@ -1036,6 +1089,12 @@ bool AsmParser::ParseStatement() {
// 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)) {
@@ -1163,6 +1222,8 @@ bool AsmParser::ParseStatement() {
return ParseDirectiveAbort();
if (IDVal == ".include")
return ParseDirectiveInclude();
+ if (IDVal == ".incbin")
+ return ParseDirectiveIncbin();
if (IDVal == ".code16")
return TokError(Twine(IDVal) + " not supported yet");
@@ -1205,7 +1266,19 @@ bool AsmParser::ParseStatement() {
}
OS << "]";
- PrintMessage(IDLoc, OS.str(), "note");
+ 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.
@@ -1294,7 +1367,7 @@ void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
if (Parser->SavedDiagHandler)
Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
else
- Diag.Print(0, OS);
+ Diag.print(0, OS);
return;
}
@@ -1309,19 +1382,15 @@ void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
int LineNo = Parser->CppHashLineNumber - 1 +
(DiagLocLineNo - CppHashLocLineNo);
- SMDiagnostic NewDiag(*Diag.getSourceMgr(),
- Diag.getLoc(),
- Filename,
- LineNo,
- Diag.getColumnNo(),
- Diag.getMessage(),
- Diag.getLineContents(),
- Diag.getShowLine());
+ 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);
+ NewDiag.print(0, OS);
}
bool AsmParser::expandMacro(SmallString<256> &Buf, StringRef Body,
@@ -1458,6 +1527,11 @@ bool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc,
}
Lex();
}
+ // If there weren't any arguments, erase the token vector so everything
+ // else knows that. Leaving around the vestigal empty token list confuses
+ // things.
+ if (MacroArguments.size() == 1 && MacroArguments.back().empty())
+ MacroArguments.clear();
// Macro instantiation is lexical, unfortunately. We construct a new buffer
// to hold the macro body with substitutions.
@@ -1495,23 +1569,27 @@ void AsmParser::HandleMacroExit() {
ActiveMacros.pop_back();
}
-static void MarkUsed(const MCExpr *Value) {
+static bool IsUsedIn(const MCSymbol *Sym, const MCExpr *Value) {
switch (Value->getKind()) {
- case MCExpr::Binary:
- MarkUsed(static_cast<const MCBinaryExpr*>(Value)->getLHS());
- MarkUsed(static_cast<const MCBinaryExpr*>(Value)->getRHS());
+ 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:
- break;
+ return false;
case MCExpr::SymbolRef: {
- static_cast<const MCSymbolRefExpr*>(Value)->getSymbol().setUsed(true);
- break;
+ const MCSymbol &S = static_cast<const MCSymbolRefExpr*>(Value)->getSymbol();
+ if (S.isVariable())
+ return IsUsedIn(Sym, S.getVariableValue());
+ return &S == Sym;
}
case MCExpr::Unary:
- MarkUsed(static_cast<const MCUnaryExpr*>(Value)->getSubExpr());
- break;
+ return IsUsedIn(Sym, static_cast<const MCUnaryExpr*>(Value)->getSubExpr());
}
+
+ llvm_unreachable("Unknown expr kind!");
}
bool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) {
@@ -1522,7 +1600,9 @@ bool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) {
if (ParseExpression(Value))
return true;
- MarkUsed(Value);
+ // 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");
@@ -1544,8 +1624,12 @@ bool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) {
//
// 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->isUsed() && !Sym->isVariable())
+ 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())
@@ -1912,6 +1996,7 @@ bool AsmParser::ParseDirectiveOrg() {
CheckForValidSection();
const MCExpr *Offset;
+ SMLoc Loc = getTok().getLoc();
if (ParseExpression(Offset))
return true;
@@ -1931,9 +2016,11 @@ bool AsmParser::ParseDirectiveOrg() {
Lex();
- // FIXME: Only limited forms of relocatable expressions are accepted here, it
- // has to be relative to the current section.
- getStreamer().EmitValueToOffset(Offset, FillExpr);
+ // 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;
}
@@ -2178,6 +2265,31 @@ bool AsmParser::ParseDirectiveInclude() {
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) {
@@ -2305,7 +2417,8 @@ bool AsmParser::ParseDirectiveEndIf(SMLoc DirectiveLoc) {
}
/// ParseDirectiveFile
-/// ::= .file [number] string
+/// ::= .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;
@@ -2321,17 +2434,35 @@ bool GenericAsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
if (getLexer().isNot(AsmToken::String))
return TokError("unexpected token in '.file' directive");
- StringRef Filename = getTok().getString();
- Filename = Filename.substr(1, Filename.size()-2);
+ // 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 (getStreamer().EmitDwarfFileDirective(FileNumber, Filename))
+ 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");
}
@@ -2719,6 +2850,56 @@ bool GenericAsmParser::ParseDirectiveCFISameValue(StringRef IDVal,
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
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-21 21:56:47 +0000