mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-13 21:05:16 +00:00
95cf30c444
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75645 91177308-0d34-0410-b5e6-96231b3b80d8
289 lines
9.1 KiB
C++
289 lines
9.1 KiB
C++
//===- lib/MC/MCAsmStreamer.cpp - Text Assembly Output --------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCStreamer.h"
|
|
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCSection.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 {
|
|
|
|
class MCAsmStreamer : public MCStreamer {
|
|
raw_ostream &OS;
|
|
|
|
MCSection *CurSection;
|
|
|
|
public:
|
|
MCAsmStreamer(MCContext &Context, raw_ostream &_OS)
|
|
: MCStreamer(Context), OS(_OS), CurSection(0) {}
|
|
~MCAsmStreamer() {}
|
|
|
|
/// @name MCStreamer Interface
|
|
/// @{
|
|
|
|
virtual void SwitchSection(MCSection *Section);
|
|
|
|
virtual void EmitLabel(MCSymbol *Symbol);
|
|
|
|
virtual void SubsectionsViaSymbols(void);
|
|
|
|
virtual void EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
|
|
bool MakeAbsolute = false);
|
|
|
|
virtual void EmitSymbolAttribute(MCSymbol *Symbol, SymbolAttr Attribute);
|
|
|
|
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
|
|
|
|
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 AbortAssembly(const char *AbortReason = NULL);
|
|
|
|
virtual void EmitBytes(const char *Data, unsigned Length);
|
|
|
|
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();
|
|
|
|
/// @}
|
|
};
|
|
|
|
}
|
|
|
|
/// Allow printing values directly to a raw_ostream.
|
|
static inline raw_ostream &operator<<(raw_ostream &os, const MCValue &Value) {
|
|
if (Value.getSymA()) {
|
|
os << Value.getSymA()->getName();
|
|
if (Value.getSymB())
|
|
os << " - " << Value.getSymB()->getName();
|
|
if (Value.getConstant())
|
|
os << " + " << Value.getConstant();
|
|
} else {
|
|
assert(!Value.getSymB() && "Invalid machine code value!");
|
|
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";
|
|
}
|
|
}
|
|
|
|
void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
|
|
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->getName() << ":\n";
|
|
Symbol->setSection(CurSection);
|
|
Symbol->setExternal(false);
|
|
}
|
|
|
|
void MCAsmStreamer::SubsectionsViaSymbols(void) {
|
|
OS << ".subsections_via_symbols\n";
|
|
}
|
|
|
|
void MCAsmStreamer::AbortAssembly(const char *AbortReason) {
|
|
OS << ".abort";
|
|
if (AbortReason != NULL)
|
|
OS << ' ' << AbortReason;
|
|
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';
|
|
} else {
|
|
OS << Symbol->getName() << " = " << Value << '\n';
|
|
}
|
|
|
|
getContext().SetSymbolValue(Symbol, Value);
|
|
}
|
|
|
|
void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
|
|
SymbolAttr Attribute) {
|
|
switch (Attribute) {
|
|
case Global: OS << ".globl"; 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';
|
|
}
|
|
|
|
void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
|
|
OS << ".desc" << ' ' << Symbol->getName() << ',' << DescValue << '\n';
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
|
|
unsigned Pow2Alignment, bool IsLocal) {
|
|
if (IsLocal)
|
|
OS << ".lcomm";
|
|
else
|
|
OS << ".comm";
|
|
OS << ' ' << Symbol->getName() << ',' << 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 " << Section->getName();
|
|
if (Symbol != NULL) {
|
|
OS << ',' << Symbol->getName() << ',' << Size;
|
|
if (Pow2Alignment != 0)
|
|
OS << ',' << Pow2Alignment;
|
|
}
|
|
OS << '\n';
|
|
}
|
|
|
|
void MCAsmStreamer::EmitBytes(const char *Data, unsigned Length) {
|
|
assert(CurSection && "Cannot emit contents before setting section!");
|
|
for (unsigned i = 0; i != Length; ++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:
|
|
llvm_unreachable("Invalid size for machine code value!");
|
|
case 1: OS << ".byte"; break;
|
|
case 2: OS << ".short"; break;
|
|
case 4: OS << ".long"; break;
|
|
case 8: OS << ".quad"; break;
|
|
}
|
|
|
|
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) {
|
|
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() {
|
|
OS.flush();
|
|
}
|
|
|
|
MCStreamer *llvm::createAsmStreamer(MCContext &Context, raw_ostream &OS) {
|
|
return new MCAsmStreamer(Context, OS);
|
|
}
|