#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCAtom.h"
#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+
using namespace llvm;
namespace {
public:
MCAsmStreamer(MCContext &Context, raw_ostream &_OS)
- : MCStreamer(Context), OS(_OS) {}
+ : MCStreamer(Context), OS(_OS), CurSection(0) {}
~MCAsmStreamer() {}
/// @name MCStreamer Interface
virtual void EmitLabel(MCSymbol *Symbol);
+ virtual void EmitAssemblerFlag(AssemblerFlag Flag);
+
virtual void EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
bool MakeAbsolute = false);
virtual void EmitSymbolAttribute(MCSymbol *Symbol, SymbolAttr Attribute);
- virtual void EmitBytes(const char *Data, unsigned Length);
+ virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
+
+ virtual void EmitLocalSymbol(MCSymbol *Symbol, const MCValue &Value);
+
+ virtual void EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
+ unsigned Pow2Alignment, bool IsLocal);
+
+ virtual void EmitZerofill(MCSection *Section, MCSymbol *Symbol = NULL,
+ unsigned Size = 0, unsigned Pow2Alignment = 0);
+
+ virtual void EmitBytes(const StringRef &Data);
virtual void EmitValue(const MCValue &Value, unsigned Size);
+ virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
+ unsigned ValueSize = 1,
+ unsigned MaxBytesToEmit = 0);
+
+ virtual void EmitValueToOffset(const MCValue &Offset,
+ unsigned char Value = 0);
+
virtual void EmitInstruction(const MCInst &Inst);
virtual void Finish();
}
+/// NeedsQuoting - Return true if the string \arg Str needs quoting, i.e., it
+/// does not match [a-zA-Z_.][a-zA-Z0-9_.]*.
+//
+// FIXME: This could be more permissive, do we care?
+static inline bool NeedsQuoting(const StringRef &Str) {
+ if (Str.empty())
+ return true;
+
+ // Check that first character is in [a-zA-Z_.].
+ if (!((Str[0] >= 'a' && Str[0] <= 'z') ||
+ (Str[0] >= 'A' && Str[0] <= 'Z') ||
+ (Str[0] == '_' || Str[0] == '.')))
+ return true;
+
+ // Check subsequent characters are in [a-zA-Z0-9_.].
+ for (unsigned i = 1, e = Str.size(); i != e; ++i)
+ if (!((Str[i] >= 'a' && Str[i] <= 'z') ||
+ (Str[i] >= 'A' && Str[i] <= 'Z') ||
+ (Str[i] >= '0' && Str[i] <= '9') ||
+ (Str[i] == '_' || Str[i] == '.')))
+ return true;
+
+ return false;
+}
+
+/// Allow printing symbols directly to a raw_ostream with proper quoting.
+static inline raw_ostream &operator<<(raw_ostream &os, const MCSymbol *S) {
+ if (NeedsQuoting(S->getName()))
+ return os << '"' << S->getName() << '"';
+ return os << S->getName();
+}
+
/// Allow printing values directly to a raw_ostream.
-inline raw_ostream &operator<<(raw_ostream &os, const MCValue &Value) {
+static inline raw_ostream &operator<<(raw_ostream &os, const MCValue &Value) {
if (Value.getSymA()) {
- os << Value.getSymA()->getName();
+ os << Value.getSymA();
if (Value.getSymB())
- os << " - " << Value.getSymB()->getName();
- if (Value.getCst())
- os << " + " << Value.getCst();
+ os << " - " << Value.getSymB();
+ if (Value.getConstant())
+ os << " + " << Value.getConstant();
} else {
assert(!Value.getSymB() && "Invalid machine code value!");
- os << Value.getCst();
+ os << Value.getConstant();
}
return os;
}
+static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
+ assert(Bytes && "Invalid size!");
+ return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
+}
+
+static inline MCValue truncateToSize(const MCValue &Value, unsigned Bytes) {
+ return MCValue::get(Value.getSymA(), Value.getSymB(),
+ truncateToSize(Value.getConstant(), Bytes));
+}
+
void MCAsmStreamer::SwitchSection(MCSection *Section) {
if (Section != CurSection) {
CurSection = Section;
- // FIXME: Really we would like the segment, flags, etc. to be separate
- // values instead of embedded in the name. Not all assemblers understand all
- // this stuff though.
- OS << ".section " << Section->getName() << "\n";
+ // FIXME: Needs TargetAsmInfo!
+ Section->PrintSwitchToSection(*(const TargetAsmInfo*)0, OS);
}
}
void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
- // FIXME: We need to enforce that we aren't printing atoms which are more
- // complicated than the assembler understands.
- //assert(Symbol->getAtom()->getSection() == CurSection &&
- // "The label for a symbol must match its section!");
- OS << Symbol->getName() << ":\n";
+ assert(Symbol->getSection() == 0 && "Cannot emit a symbol twice!");
+ assert(CurSection && "Cannot emit before setting section!");
+ assert(!getContext().GetSymbolValue(Symbol) &&
+ "Cannot emit symbol which was directly assigned to!");
+
+ OS << Symbol << ":\n";
+ Symbol->setSection(CurSection);
+ Symbol->setExternal(false);
+}
+
+void MCAsmStreamer::EmitAssemblerFlag(AssemblerFlag Flag) {
+ switch (Flag) {
+ case SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
+ }
+ OS << '\n';
}
void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
bool MakeAbsolute) {
+ assert(!Symbol->getSection() && "Cannot assign to a label!");
+
if (MakeAbsolute) {
- OS << ".set " << Symbol->getName() << ", " << Value << '\n';
+ OS << ".set " << Symbol << ", " << Value << '\n';
} else {
- OS << Symbol->getName() << " = " << Value << '\n';
+ OS << Symbol << " = " << Value << '\n';
}
+
+ getContext().SetSymbolValue(Symbol, Value);
}
void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
SymbolAttr Attribute) {
switch (Attribute) {
case Global: OS << ".globl"; break;
- case Weak: OS << ".weak"; break;
+ case Hidden: OS << ".hidden"; break;
+ case IndirectSymbol: OS << ".indirect_symbol"; break;
+ case Internal: OS << ".internal"; break;
+ case LazyReference: OS << ".lazy_reference"; break;
+ case NoDeadStrip: OS << ".no_dead_strip"; break;
case PrivateExtern: OS << ".private_extern"; break;
+ case Protected: OS << ".protected"; break;
+ case Reference: OS << ".reference"; break;
+ case Weak: OS << ".weak"; break;
+ case WeakDefinition: OS << ".weak_definition"; break;
+ case WeakReference: OS << ".weak_reference"; break;
}
- OS << ' ' << Symbol->getName() << '\n';
+ OS << ' ' << Symbol << '\n';
}
-void MCAsmStreamer::EmitBytes(const char *Data, unsigned Length) {
- for (unsigned i = 0; i != Length; ++i) {
- OS << ".byte " << (unsigned) Data[i] << '\n';
+void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
+ OS << ".desc" << ' ' << Symbol << ',' << DescValue << '\n';
+}
+
+void MCAsmStreamer::EmitLocalSymbol(MCSymbol *Symbol, const MCValue &Value) {
+ OS << ".lsym" << ' ' << Symbol << ',' << Value << '\n';
+}
+
+void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
+ unsigned Pow2Alignment, bool IsLocal) {
+ if (IsLocal)
+ OS << ".lcomm";
+ else
+ OS << ".comm";
+ OS << ' ' << Symbol << ',' << Size;
+ if (Pow2Alignment != 0)
+ OS << ',' << Pow2Alignment;
+ OS << '\n';
+}
+
+void MCAsmStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
+ unsigned Size, unsigned Pow2Alignment) {
+ // Note: a .zerofill directive does not switch sections
+ // FIXME: Really we would like the segment and section names as well as the
+ // section type to be separate values instead of embedded in the name. Not
+ // all assemblers understand all this stuff though.
+ OS << ".zerofill ";
+
+ // This is a mach-o specific directive.
+ const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section);
+ OS << '"' << MOSection->getSegmentName() << ","
+ << MOSection->getSectionName() << '"';
+
+
+ if (Symbol != NULL) {
+ OS << ',' << Symbol << ',' << Size;
+ if (Pow2Alignment != 0)
+ OS << ',' << Pow2Alignment;
}
+ OS << '\n';
+}
+
+void MCAsmStreamer::EmitBytes(const StringRef &Data) {
+ assert(CurSection && "Cannot emit contents before setting section!");
+ for (unsigned i = 0, e = Data.size(); i != e; ++i)
+ OS << ".byte " << (unsigned) Data[i] << '\n';
}
void MCAsmStreamer::EmitValue(const MCValue &Value, unsigned Size) {
+ assert(CurSection && "Cannot emit contents before setting section!");
// Need target hooks to know how to print this.
switch (Size) {
default:
- assert(0 && "Invalid size for machine code value!");
+ llvm_unreachable("Invalid size for machine code value!");
case 1: OS << ".byte"; break;
- case 2: OS << ".hword"; break;
+ case 2: OS << ".short"; break;
case 4: OS << ".long"; break;
case 8: OS << ".quad"; break;
}
- OS << ' ' << Value << '\n';
+ OS << ' ' << truncateToSize(Value, Size) << '\n';
+}
+
+void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {
+ // Some assemblers don't support .balign, so we always emit as .p2align if
+ // this is a power of two. Otherwise we assume the client knows the target
+ // supports .balign and use that.
+ unsigned Pow2 = Log2_32(ByteAlignment);
+ bool IsPow2 = (1U << Pow2) == ByteAlignment;
+
+ switch (ValueSize) {
+ default:
+ llvm_unreachable("Invalid size for machine code value!");
+ case 8:
+ llvm_unreachable("Unsupported alignment size!");
+ case 1: OS << (IsPow2 ? ".p2align" : ".balign"); break;
+ case 2: OS << (IsPow2 ? ".p2alignw" : ".balignw"); break;
+ case 4: OS << (IsPow2 ? ".p2alignl" : ".balignl"); break;
+ }
+
+ OS << ' ' << (IsPow2 ? Pow2 : ByteAlignment);
+
+ OS << ", " << truncateToSize(Value, ValueSize);
+ if (MaxBytesToEmit)
+ OS << ", " << MaxBytesToEmit;
+ OS << '\n';
+}
+
+void MCAsmStreamer::EmitValueToOffset(const MCValue &Offset,
+ unsigned char Value) {
+ // FIXME: Verify that Offset is associated with the current section.
+ OS << ".org " << Offset << ", " << (unsigned) Value << '\n';
+}
+
+static raw_ostream &operator<<(raw_ostream &OS, const MCOperand &Op) {
+ if (Op.isReg())
+ return OS << "reg:" << Op.getReg();
+ if (Op.isImm())
+ return OS << "imm:" << Op.getImm();
+ if (Op.isMBBLabel())
+ return OS << "mbblabel:("
+ << Op.getMBBLabelFunction() << ", " << Op.getMBBLabelBlock();
+ assert(Op.isMCValue() && "Invalid operand!");
+ return OS << "val:" << Op.getMCValue();
}
void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
- // FIXME: Implement.
- OS << "# FIXME: Implement instruction printing!\n";
+ assert(CurSection && "Cannot emit contents before setting section!");
+ // FIXME: Implement proper printing.
+ OS << "MCInst("
+ << "opcode=" << Inst.getOpcode() << ", "
+ << "operands=[";
+ for (unsigned i = 0, e = Inst.getNumOperands(); i != e; ++i) {
+ if (i)
+ OS << ", ";
+ OS << Inst.getOperand(i);
+ }
+ OS << "])\n";
}
void MCAsmStreamer::Finish() {
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