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-rw-r--r--lib/MC/MCAsmStreamer.cpp296
1 files changed, 218 insertions, 78 deletions
diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp
index bf39239e7a7b8..6add1b4abaab6 100644
--- a/lib/MC/MCAsmStreamer.cpp
+++ b/lib/MC/MCAsmStreamer.cpp
@@ -29,25 +29,32 @@ namespace {
class MCAsmStreamer : public MCStreamer {
formatted_raw_ostream &OS;
const MCAsmInfo &MAI;
- bool IsLittleEndian, IsVerboseAsm;
MCInstPrinter *InstPrinter;
MCCodeEmitter *Emitter;
SmallString<128> CommentToEmit;
raw_svector_ostream CommentStream;
+
+ unsigned IsLittleEndian : 1;
+ unsigned IsVerboseAsm : 1;
+ unsigned ShowInst : 1;
+
public:
MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os,
const MCAsmInfo &mai,
bool isLittleEndian, bool isVerboseAsm, MCInstPrinter *printer,
- MCCodeEmitter *emitter)
- : MCStreamer(Context), OS(os), MAI(mai), IsLittleEndian(isLittleEndian),
- IsVerboseAsm(isVerboseAsm), InstPrinter(printer), Emitter(emitter),
- CommentStream(CommentToEmit) {}
+ MCCodeEmitter *emitter, bool showInst)
+ : MCStreamer(Context), OS(os), MAI(mai), InstPrinter(printer),
+ Emitter(emitter), CommentStream(CommentToEmit),
+ IsLittleEndian(isLittleEndian), IsVerboseAsm(isVerboseAsm),
+ ShowInst(showInst) {
+ if (InstPrinter && IsVerboseAsm)
+ InstPrinter->setCommentStream(CommentStream);
+ }
~MCAsmStreamer() {}
bool isLittleEndian() const { return IsLittleEndian; }
-
-
+
inline void EmitEOL() {
// If we don't have any comments, just emit a \n.
if (!IsVerboseAsm) {
@@ -57,13 +64,20 @@ public:
EmitCommentsAndEOL();
}
void EmitCommentsAndEOL();
-
+
+ /// isVerboseAsm - Return true if this streamer supports verbose assembly at
+ /// all.
+ virtual bool isVerboseAsm() const { return IsVerboseAsm; }
+
/// AddComment - Add a comment that can be emitted to the generated .s
/// file if applicable as a QoI issue to make the output of the compiler
/// more readable. This only affects the MCAsmStreamer, and only when
/// verbose assembly output is enabled.
virtual void AddComment(const Twine &T);
-
+
+ /// AddEncodingComment - Add a comment showing the encoding of an instruction.
+ virtual void AddEncodingComment(const MCInst &Inst);
+
/// GetCommentOS - Return a raw_ostream that comments can be written to.
/// Unlike AddComment, you are required to terminate comments with \n if you
/// use this method.
@@ -72,12 +86,12 @@ public:
return nulls(); // Discard comments unless in verbose asm mode.
return CommentStream;
}
-
+
/// AddBlankLine - Emit a blank line to a .s file to pretty it up.
virtual void AddBlankLine() {
EmitEOL();
}
-
+
/// @name MCStreamer Interface
/// @{
@@ -93,6 +107,7 @@ public:
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
+ virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment);
@@ -109,6 +124,8 @@ public:
virtual void EmitValue(const MCExpr *Value, unsigned Size,unsigned AddrSpace);
virtual void EmitIntValue(uint64_t Value, unsigned Size, unsigned AddrSpace);
+ virtual void EmitGPRel32Value(const MCExpr *Value);
+
virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue,
unsigned AddrSpace);
@@ -119,9 +136,12 @@ public:
virtual void EmitValueToOffset(const MCExpr *Offset,
unsigned char Value = 0);
-
- virtual void EmitInstruction(const MCInst &Inst);
+ virtual void EmitFileDirective(StringRef Filename);
+ virtual void EmitDwarfFileDirective(unsigned FileNo, StringRef Filename);
+
+ virtual void EmitInstruction(const MCInst &Inst);
+
virtual void Finish();
/// @}
@@ -178,12 +198,6 @@ static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
}
-static inline const MCExpr *truncateToSize(const MCExpr *Value,
- unsigned Bytes) {
- // FIXME: Do we really need this routine?
- return Value;
-}
-
void MCAsmStreamer::SwitchSection(const MCSection *Section) {
assert(Section && "Cannot switch to a null section!");
if (Section != CurSection) {
@@ -226,7 +240,29 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCSymbolAttr Attribute) {
switch (Attribute) {
case MCSA_Invalid: assert(0 && "Invalid symbol attribute");
- case MCSA_Global: OS << MAI.getGlobalDirective(); break; // .globl
+ case MCSA_ELF_TypeFunction: /// .type _foo, STT_FUNC # aka @function
+ case MCSA_ELF_TypeIndFunction: /// .type _foo, STT_GNU_IFUNC
+ case MCSA_ELF_TypeObject: /// .type _foo, STT_OBJECT # aka @object
+ case MCSA_ELF_TypeTLS: /// .type _foo, STT_TLS # aka @tls_object
+ case MCSA_ELF_TypeCommon: /// .type _foo, STT_COMMON # aka @common
+ case MCSA_ELF_TypeNoType: /// .type _foo, STT_NOTYPE # aka @notype
+ assert(MAI.hasDotTypeDotSizeDirective() && "Symbol Attr not supported");
+ OS << "\t.type\t" << *Symbol << ','
+ << ((MAI.getCommentString()[0] != '@') ? '@' : '%');
+ switch (Attribute) {
+ default: assert(0 && "Unknown ELF .type");
+ case MCSA_ELF_TypeFunction: OS << "function"; break;
+ case MCSA_ELF_TypeIndFunction: OS << "gnu_indirect_function"; break;
+ case MCSA_ELF_TypeObject: OS << "object"; break;
+ case MCSA_ELF_TypeTLS: OS << "tls_object"; break;
+ case MCSA_ELF_TypeCommon: OS << "common"; break;
+ case MCSA_ELF_TypeNoType: OS << "no_type"; break;
+ }
+ EmitEOL();
+ return;
+ case MCSA_Global: // .globl/.global
+ OS << MAI.getGlobalDirective();
+ break;
case MCSA_Hidden: OS << ".hidden "; break;
case MCSA_IndirectSymbol: OS << ".indirect_symbol "; break;
case MCSA_Internal: OS << ".internal "; break;
@@ -251,11 +287,16 @@ void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
EmitEOL();
}
+void MCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
+ assert(MAI.hasDotTypeDotSizeDirective());
+ OS << "\t.size\t" << *Symbol << ", " << *Value << '\n';
+}
+
void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
OS << "\t.comm\t" << *Symbol << ',' << Size;
- if (ByteAlignment != 0 && MAI.getCOMMDirectiveTakesAlignment()) {
- if (MAI.getAlignmentIsInBytes())
+ if (ByteAlignment != 0) {
+ if (MAI.getCOMMDirectiveAlignmentIsInBytes())
OS << ',' << ByteAlignment;
else
OS << ',' << Log2_32(ByteAlignment);
@@ -292,6 +333,40 @@ void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
static inline char toOctal(int X) { return (X&7)+'0'; }
+static void PrintQuotedString(StringRef Data, raw_ostream &OS) {
+ OS << '"';
+
+ for (unsigned i = 0, e = Data.size(); i != e; ++i) {
+ unsigned char C = Data[i];
+ if (C == '"' || C == '\\') {
+ OS << '\\' << (char)C;
+ continue;
+ }
+
+ if (isprint((unsigned char)C)) {
+ OS << (char)C;
+ continue;
+ }
+
+ switch (C) {
+ case '\b': OS << "\\b"; break;
+ case '\f': OS << "\\f"; break;
+ case '\n': OS << "\\n"; break;
+ case '\r': OS << "\\r"; break;
+ case '\t': OS << "\\t"; break;
+ default:
+ OS << '\\';
+ OS << toOctal(C >> 6);
+ OS << toOctal(C >> 3);
+ OS << toOctal(C >> 0);
+ break;
+ }
+ }
+
+ OS << '"';
+}
+
+
void MCAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
assert(CurSection && "Cannot emit contents before setting section!");
if (Data.empty()) return;
@@ -312,34 +387,8 @@ void MCAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
OS << MAI.getAsciiDirective();
}
- OS << " \"";
- for (unsigned i = 0, e = Data.size(); i != e; ++i) {
- unsigned char C = Data[i];
- if (C == '"' || C == '\\') {
- OS << '\\' << (char)C;
- continue;
- }
-
- if (isprint((unsigned char)C)) {
- OS << (char)C;
- continue;
- }
-
- switch (C) {
- case '\b': OS << "\\b"; break;
- case '\f': OS << "\\f"; break;
- case '\n': OS << "\\n"; break;
- case '\r': OS << "\\r"; break;
- case '\t': OS << "\\t"; break;
- default:
- OS << '\\';
- OS << toOctal(C >> 6);
- OS << toOctal(C >> 3);
- OS << toOctal(C >> 0);
- break;
- }
- }
- OS << '"';
+ OS << ' ';
+ PrintQuotedString(Data, OS);
EmitEOL();
}
@@ -386,10 +435,17 @@ void MCAsmStreamer::EmitValue(const MCExpr *Value, unsigned Size,
}
assert(Directive && "Invalid size for machine code value!");
- OS << Directive << *truncateToSize(Value, Size);
+ OS << Directive << *Value;
+ EmitEOL();
+}
+
+void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
+ assert(MAI.getGPRel32Directive() != 0);
+ OS << MAI.getGPRel32Directive() << *Value;
EmitEOL();
}
+
/// EmitFill - Emit NumBytes bytes worth of the value specified by
/// FillValue. This implements directives such as '.space'.
void MCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
@@ -464,49 +520,133 @@ void MCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
EmitEOL();
}
-void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
- assert(CurSection && "Cannot emit contents before setting section!");
- // If we have an AsmPrinter, use that to print.
- if (InstPrinter) {
- InstPrinter->printInst(&Inst);
- EmitEOL();
+void MCAsmStreamer::EmitFileDirective(StringRef Filename) {
+ assert(MAI.hasSingleParameterDotFile());
+ OS << "\t.file\t";
+ PrintQuotedString(Filename, OS);
+ EmitEOL();
+}
- // Show the encoding if we have a code emitter.
- if (Emitter) {
- SmallString<256> Code;
- raw_svector_ostream VecOS(Code);
- Emitter->EncodeInstruction(Inst, VecOS);
- VecOS.flush();
-
- OS.indent(20);
- OS << " # encoding: [";
- for (unsigned i = 0, e = Code.size(); i != e; ++i) {
- if (i)
- OS << ',';
- OS << format("%#04x", uint8_t(Code[i]));
+void MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo, StringRef Filename){
+ OS << "\t.file\t" << FileNo << ' ';
+ PrintQuotedString(Filename, OS);
+ EmitEOL();
+}
+
+void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) {
+ raw_ostream &OS = GetCommentOS();
+ SmallString<256> Code;
+ SmallVector<MCFixup, 4> Fixups;
+ raw_svector_ostream VecOS(Code);
+ Emitter->EncodeInstruction(Inst, VecOS, Fixups);
+ VecOS.flush();
+
+ // If we are showing fixups, create symbolic markers in the encoded
+ // representation. We do this by making a per-bit map to the fixup item index,
+ // then trying to display it as nicely as possible.
+ SmallVector<uint8_t, 64> FixupMap;
+ FixupMap.resize(Code.size() * 8);
+ for (unsigned i = 0, e = Code.size() * 8; i != e; ++i)
+ FixupMap[i] = 0;
+
+ for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
+ MCFixup &F = Fixups[i];
+ const MCFixupKindInfo &Info = Emitter->getFixupKindInfo(F.getKind());
+ for (unsigned j = 0; j != Info.TargetSize; ++j) {
+ unsigned Index = F.getOffset() * 8 + Info.TargetOffset + j;
+ assert(Index < Code.size() * 8 && "Invalid offset in fixup!");
+ FixupMap[Index] = 1 + i;
+ }
+ }
+
+ OS << "encoding: [";
+ for (unsigned i = 0, e = Code.size(); i != e; ++i) {
+ if (i)
+ OS << ',';
+
+ // See if all bits are the same map entry.
+ uint8_t MapEntry = FixupMap[i * 8 + 0];
+ for (unsigned j = 1; j != 8; ++j) {
+ if (FixupMap[i * 8 + j] == MapEntry)
+ continue;
+
+ MapEntry = uint8_t(~0U);
+ break;
+ }
+
+ if (MapEntry != uint8_t(~0U)) {
+ if (MapEntry == 0) {
+ OS << format("0x%02x", uint8_t(Code[i]));
+ } else {
+ assert(Code[i] == 0 && "Encoder wrote into fixed up bit!");
+ OS << char('A' + MapEntry - 1);
+ }
+ } else {
+ // Otherwise, write out in binary.
+ OS << "0b";
+ for (unsigned j = 8; j--;) {
+ unsigned Bit = (Code[i] >> j) & 1;
+ if (uint8_t MapEntry = FixupMap[i * 8 + j]) {
+ assert(Bit == 0 && "Encoder wrote into fixed up bit!");
+ OS << char('A' + MapEntry - 1);
+ } else
+ OS << Bit;
}
- OS << "]\n";
}
+ }
+ OS << "]\n";
- return;
+ for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
+ MCFixup &F = Fixups[i];
+ const MCFixupKindInfo &Info = Emitter->getFixupKindInfo(F.getKind());
+ OS << " fixup " << char('A' + i) << " - " << "offset: " << F.getOffset()
+ << ", value: " << *F.getValue() << ", kind: " << Info.Name << "\n";
}
+}
+
+void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
+ assert(CurSection && "Cannot emit contents before setting section!");
- // Otherwise fall back to a structural printing for now. Eventually we should
- // always have access to the target specific printer.
- Inst.print(OS, &MAI);
+ // Show the encoding in a comment if we have a code emitter.
+ if (Emitter)
+ AddEncodingComment(Inst);
+
+ // Show the MCInst if enabled.
+ if (ShowInst) {
+ raw_ostream &OS = GetCommentOS();
+ OS << "<MCInst #" << Inst.getOpcode();
+
+ StringRef InstName;
+ if (InstPrinter)
+ InstName = InstPrinter->getOpcodeName(Inst.getOpcode());
+ if (!InstName.empty())
+ OS << ' ' << InstName;
+
+ for (unsigned i = 0, e = Inst.getNumOperands(); i != e; ++i) {
+ OS << "\n ";
+ Inst.getOperand(i).print(OS, &MAI);
+ }
+ OS << ">\n";
+ }
+
+ // If we have an AsmPrinter, use that to print, otherwise dump the MCInst.
+ if (InstPrinter)
+ InstPrinter->printInst(&Inst);
+ else
+ Inst.print(OS, &MAI);
EmitEOL();
}
void MCAsmStreamer::Finish() {
OS.flush();
}
-
+
MCStreamer *llvm::createAsmStreamer(MCContext &Context,
formatted_raw_ostream &OS,
const MCAsmInfo &MAI, bool isLittleEndian,
bool isVerboseAsm, MCInstPrinter *IP,
- MCCodeEmitter *CE) {
+ MCCodeEmitter *CE, bool ShowInst) {
return new MCAsmStreamer(Context, OS, MAI, isLittleEndian, isVerboseAsm,
- IP, CE);
+ IP, CE, ShowInst);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-18 00:58:10 +0000