mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
14c38ec2af
Move the X86 implementation of function body emission up to AsmPrinter::EmitFunctionBody, which works by calling the virtual EmitInstruction method. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94716 91177308-0d34-0410-b5e6-96231b3b80d8
630 lines
22 KiB
C++
630 lines
22 KiB
C++
//===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains a printer that converts from our internal representation
|
|
// of machine-dependent LLVM code to X86 machine code.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86AsmPrinter.h"
|
|
#include "X86ATTInstPrinter.h"
|
|
#include "X86IntelInstPrinter.h"
|
|
#include "X86MCInstLower.h"
|
|
#include "X86.h"
|
|
#include "X86COFF.h"
|
|
#include "X86COFFMachineModuleInfo.h"
|
|
#include "X86MachineFunctionInfo.h"
|
|
#include "X86TargetMachine.h"
|
|
#include "llvm/CallingConv.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Type.h"
|
|
#include "llvm/Assembly/Writer.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCSectionMachO.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
#include "llvm/MC/MCSymbol.h"
|
|
#include "llvm/CodeGen/MachineJumpTableInfo.h"
|
|
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/Target/TargetLoweringObjectFile.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
#include "llvm/Target/TargetRegistry.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
using namespace llvm;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Primitive Helper Functions.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void X86AsmPrinter::printMCInst(const MCInst *MI) {
|
|
if (MAI->getAssemblerDialect() == 0)
|
|
X86ATTInstPrinter(O, *MAI).printInstruction(MI);
|
|
else
|
|
X86IntelInstPrinter(O, *MAI).printInstruction(MI);
|
|
}
|
|
|
|
void X86AsmPrinter::PrintPICBaseSymbol() const {
|
|
const TargetLowering *TLI = TM.getTargetLowering();
|
|
O << *static_cast<const X86TargetLowering*>(TLI)->getPICBaseSymbol(MF,
|
|
OutContext);
|
|
}
|
|
|
|
/// runOnMachineFunction - Emit the function body.
|
|
///
|
|
bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
|
|
SetupMachineFunction(MF);
|
|
O << "\n\n";
|
|
|
|
// COFF and Cygwin specific mangling stuff. This should be moved out to the
|
|
// mangler or handled some other way?
|
|
if (Subtarget->isTargetCOFF()) {
|
|
X86COFFMachineModuleInfo &COFFMMI =
|
|
MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
|
|
|
|
// Populate function information map. Don't want to populate
|
|
// non-stdcall or non-fastcall functions' information right now.
|
|
const Function *F = MF.getFunction();
|
|
CallingConv::ID CC = F->getCallingConv();
|
|
if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
|
|
COFFMMI.AddFunctionInfo(F, *MF.getInfo<X86MachineFunctionInfo>());
|
|
}
|
|
if (Subtarget->isTargetCygMing()) {
|
|
const Function *F = MF.getFunction();
|
|
X86COFFMachineModuleInfo &COFFMMI =
|
|
MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
|
|
COFFMMI.DecorateCygMingName(CurrentFnSym, OutContext,F,*TM.getTargetData());
|
|
|
|
O << "\t.def\t " << *CurrentFnSym;
|
|
O << ";\t.scl\t" <<
|
|
(F->hasInternalLinkage() ? COFF::C_STAT : COFF::C_EXT)
|
|
<< ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
|
|
<< ";\t.endef\n";
|
|
}
|
|
|
|
// Have common code print out the function header with linkage info etc.
|
|
EmitFunctionHeader();
|
|
|
|
// Emit the rest of the function body.
|
|
EmitFunctionBody();
|
|
|
|
// We didn't modify anything.
|
|
return false;
|
|
}
|
|
|
|
/// printSymbolOperand - Print a raw symbol reference operand. This handles
|
|
/// jump tables, constant pools, global address and external symbols, all of
|
|
/// which print to a label with various suffixes for relocation types etc.
|
|
void X86AsmPrinter::printSymbolOperand(const MachineOperand &MO) {
|
|
switch (MO.getType()) {
|
|
default: llvm_unreachable("unknown symbol type!");
|
|
case MachineOperand::MO_JumpTableIndex:
|
|
O << *GetJTISymbol(MO.getIndex());
|
|
break;
|
|
case MachineOperand::MO_ConstantPoolIndex:
|
|
O << *GetCPISymbol(MO.getIndex());
|
|
printOffset(MO.getOffset());
|
|
break;
|
|
case MachineOperand::MO_GlobalAddress: {
|
|
const GlobalValue *GV = MO.getGlobal();
|
|
|
|
MCSymbol *GVSym;
|
|
if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB)
|
|
GVSym = GetSymbolWithGlobalValueBase(GV, "$stub");
|
|
else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
|
|
MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
|
|
MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
|
|
GVSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
|
|
else
|
|
GVSym = GetGlobalValueSymbol(GV);
|
|
|
|
if (Subtarget->isTargetCygMing()) {
|
|
X86COFFMachineModuleInfo &COFFMMI =
|
|
MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
|
|
COFFMMI.DecorateCygMingName(GVSym, OutContext, GV, *TM.getTargetData());
|
|
}
|
|
|
|
// Handle dllimport linkage.
|
|
if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
|
|
GVSym = OutContext.GetOrCreateSymbol(Twine("__imp_") + GVSym->getName());
|
|
|
|
if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
|
|
MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
|
|
MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
|
|
|
|
const MCSymbol *&StubSym =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
|
|
if (StubSym == 0)
|
|
StubSym = GetGlobalValueSymbol(GV);
|
|
|
|
} else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
|
|
MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
|
|
const MCSymbol *&StubSym =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym);
|
|
if (StubSym == 0)
|
|
StubSym = GetGlobalValueSymbol(GV);
|
|
} else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
|
|
MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub");
|
|
const MCSymbol *&StubSym =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
|
|
if (StubSym == 0)
|
|
StubSym = GetGlobalValueSymbol(GV);
|
|
}
|
|
|
|
// If the name begins with a dollar-sign, enclose it in parens. We do this
|
|
// to avoid having it look like an integer immediate to the assembler.
|
|
if (GVSym->getName()[0] != '$')
|
|
O << *GVSym;
|
|
else
|
|
O << '(' << *GVSym << ')';
|
|
printOffset(MO.getOffset());
|
|
break;
|
|
}
|
|
case MachineOperand::MO_ExternalSymbol: {
|
|
const MCSymbol *SymToPrint;
|
|
if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
|
|
SmallString<128> TempNameStr;
|
|
TempNameStr += StringRef(MO.getSymbolName());
|
|
TempNameStr += StringRef("$stub");
|
|
|
|
const MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
|
|
const MCSymbol *&StubSym =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
|
|
if (StubSym == 0) {
|
|
TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
|
|
StubSym = OutContext.GetOrCreateSymbol(TempNameStr.str());
|
|
}
|
|
SymToPrint = StubSym;
|
|
} else {
|
|
SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
|
|
}
|
|
|
|
// If the name begins with a dollar-sign, enclose it in parens. We do this
|
|
// to avoid having it look like an integer immediate to the assembler.
|
|
if (SymToPrint->getName()[0] != '$')
|
|
O << *SymToPrint;
|
|
else
|
|
O << '(' << *SymToPrint << '(';
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (MO.getTargetFlags()) {
|
|
default:
|
|
llvm_unreachable("Unknown target flag on GV operand");
|
|
case X86II::MO_NO_FLAG: // No flag.
|
|
break;
|
|
case X86II::MO_DARWIN_NONLAZY:
|
|
case X86II::MO_DLLIMPORT:
|
|
case X86II::MO_DARWIN_STUB:
|
|
// These affect the name of the symbol, not any suffix.
|
|
break;
|
|
case X86II::MO_GOT_ABSOLUTE_ADDRESS:
|
|
O << " + [.-";
|
|
PrintPICBaseSymbol();
|
|
O << ']';
|
|
break;
|
|
case X86II::MO_PIC_BASE_OFFSET:
|
|
case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
|
|
case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
|
|
O << '-';
|
|
PrintPICBaseSymbol();
|
|
break;
|
|
case X86II::MO_TLSGD: O << "@TLSGD"; break;
|
|
case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break;
|
|
case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break;
|
|
case X86II::MO_TPOFF: O << "@TPOFF"; break;
|
|
case X86II::MO_NTPOFF: O << "@NTPOFF"; break;
|
|
case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break;
|
|
case X86II::MO_GOT: O << "@GOT"; break;
|
|
case X86II::MO_GOTOFF: O << "@GOTOFF"; break;
|
|
case X86II::MO_PLT: O << "@PLT"; break;
|
|
}
|
|
}
|
|
|
|
/// print_pcrel_imm - This is used to print an immediate value that ends up
|
|
/// being encoded as a pc-relative value. These print slightly differently, for
|
|
/// example, a $ is not emitted.
|
|
void X86AsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo) {
|
|
const MachineOperand &MO = MI->getOperand(OpNo);
|
|
switch (MO.getType()) {
|
|
default: llvm_unreachable("Unknown pcrel immediate operand");
|
|
case MachineOperand::MO_Immediate:
|
|
O << MO.getImm();
|
|
return;
|
|
case MachineOperand::MO_MachineBasicBlock:
|
|
O << *MO.getMBB()->getSymbol(OutContext);
|
|
return;
|
|
case MachineOperand::MO_GlobalAddress:
|
|
case MachineOperand::MO_ExternalSymbol:
|
|
printSymbolOperand(MO);
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
|
|
const char *Modifier) {
|
|
const MachineOperand &MO = MI->getOperand(OpNo);
|
|
switch (MO.getType()) {
|
|
default: llvm_unreachable("unknown operand type!");
|
|
case MachineOperand::MO_Register: {
|
|
O << '%';
|
|
unsigned Reg = MO.getReg();
|
|
if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
|
|
EVT VT = (strcmp(Modifier+6,"64") == 0) ?
|
|
MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
|
|
((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
|
|
Reg = getX86SubSuperRegister(Reg, VT);
|
|
}
|
|
O << X86ATTInstPrinter::getRegisterName(Reg);
|
|
return;
|
|
}
|
|
|
|
case MachineOperand::MO_Immediate:
|
|
O << '$' << MO.getImm();
|
|
return;
|
|
|
|
case MachineOperand::MO_JumpTableIndex:
|
|
case MachineOperand::MO_ConstantPoolIndex:
|
|
case MachineOperand::MO_GlobalAddress:
|
|
case MachineOperand::MO_ExternalSymbol: {
|
|
O << '$';
|
|
printSymbolOperand(MO);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void X86AsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
|
|
unsigned char value = MI->getOperand(Op).getImm();
|
|
assert(value <= 7 && "Invalid ssecc argument!");
|
|
switch (value) {
|
|
case 0: O << "eq"; break;
|
|
case 1: O << "lt"; break;
|
|
case 2: O << "le"; break;
|
|
case 3: O << "unord"; break;
|
|
case 4: O << "neq"; break;
|
|
case 5: O << "nlt"; break;
|
|
case 6: O << "nle"; break;
|
|
case 7: O << "ord"; break;
|
|
}
|
|
}
|
|
|
|
void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
|
|
const char *Modifier) {
|
|
const MachineOperand &BaseReg = MI->getOperand(Op);
|
|
const MachineOperand &IndexReg = MI->getOperand(Op+2);
|
|
const MachineOperand &DispSpec = MI->getOperand(Op+3);
|
|
|
|
// If we really don't want to print out (rip), don't.
|
|
bool HasBaseReg = BaseReg.getReg() != 0;
|
|
if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") &&
|
|
BaseReg.getReg() == X86::RIP)
|
|
HasBaseReg = false;
|
|
|
|
// HasParenPart - True if we will print out the () part of the mem ref.
|
|
bool HasParenPart = IndexReg.getReg() || HasBaseReg;
|
|
|
|
if (DispSpec.isImm()) {
|
|
int DispVal = DispSpec.getImm();
|
|
if (DispVal || !HasParenPart)
|
|
O << DispVal;
|
|
} else {
|
|
assert(DispSpec.isGlobal() || DispSpec.isCPI() ||
|
|
DispSpec.isJTI() || DispSpec.isSymbol());
|
|
printSymbolOperand(MI->getOperand(Op+3));
|
|
}
|
|
|
|
if (HasParenPart) {
|
|
assert(IndexReg.getReg() != X86::ESP &&
|
|
"X86 doesn't allow scaling by ESP");
|
|
|
|
O << '(';
|
|
if (HasBaseReg)
|
|
printOperand(MI, Op, Modifier);
|
|
|
|
if (IndexReg.getReg()) {
|
|
O << ',';
|
|
printOperand(MI, Op+2, Modifier);
|
|
unsigned ScaleVal = MI->getOperand(Op+1).getImm();
|
|
if (ScaleVal != 1)
|
|
O << ',' << ScaleVal;
|
|
}
|
|
O << ')';
|
|
}
|
|
}
|
|
|
|
void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
|
|
const char *Modifier) {
|
|
assert(isMem(MI, Op) && "Invalid memory reference!");
|
|
const MachineOperand &Segment = MI->getOperand(Op+4);
|
|
if (Segment.getReg()) {
|
|
printOperand(MI, Op+4, Modifier);
|
|
O << ':';
|
|
}
|
|
printLeaMemReference(MI, Op, Modifier);
|
|
}
|
|
|
|
void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
|
|
PrintPICBaseSymbol();
|
|
O << '\n';
|
|
PrintPICBaseSymbol();
|
|
O << ':';
|
|
}
|
|
|
|
bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode) {
|
|
unsigned Reg = MO.getReg();
|
|
switch (Mode) {
|
|
default: return true; // Unknown mode.
|
|
case 'b': // Print QImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8);
|
|
break;
|
|
case 'h': // Print QImode high register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
|
|
break;
|
|
case 'w': // Print HImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i16);
|
|
break;
|
|
case 'k': // Print SImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i32);
|
|
break;
|
|
case 'q': // Print DImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i64);
|
|
break;
|
|
}
|
|
|
|
O << '%' << X86ATTInstPrinter::getRegisterName(Reg);
|
|
return false;
|
|
}
|
|
|
|
/// PrintAsmOperand - Print out an operand for an inline asm expression.
|
|
///
|
|
bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant,
|
|
const char *ExtraCode) {
|
|
// Does this asm operand have a single letter operand modifier?
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
const MachineOperand &MO = MI->getOperand(OpNo);
|
|
|
|
switch (ExtraCode[0]) {
|
|
default: return true; // Unknown modifier.
|
|
case 'a': // This is an address. Currently only 'i' and 'r' are expected.
|
|
if (MO.isImm()) {
|
|
O << MO.getImm();
|
|
return false;
|
|
}
|
|
if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
|
|
printSymbolOperand(MO);
|
|
return false;
|
|
}
|
|
if (MO.isReg()) {
|
|
O << '(';
|
|
printOperand(MI, OpNo);
|
|
O << ')';
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 'c': // Don't print "$" before a global var name or constant.
|
|
if (MO.isImm())
|
|
O << MO.getImm();
|
|
else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol())
|
|
printSymbolOperand(MO);
|
|
else
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
|
|
case 'A': // Print '*' before a register (it must be a register)
|
|
if (MO.isReg()) {
|
|
O << '*';
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 'b': // Print QImode register
|
|
case 'h': // Print QImode high register
|
|
case 'w': // Print HImode register
|
|
case 'k': // Print SImode register
|
|
case 'q': // Print DImode register
|
|
if (MO.isReg())
|
|
return printAsmMRegister(MO, ExtraCode[0]);
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
|
|
case 'P': // This is the operand of a call, treat specially.
|
|
print_pcrel_imm(MI, OpNo);
|
|
return false;
|
|
|
|
case 'n': // Negate the immediate or print a '-' before the operand.
|
|
// Note: this is a temporary solution. It should be handled target
|
|
// independently as part of the 'MC' work.
|
|
if (MO.isImm()) {
|
|
O << -MO.getImm();
|
|
return false;
|
|
}
|
|
O << '-';
|
|
}
|
|
}
|
|
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
}
|
|
|
|
bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
|
|
unsigned OpNo, unsigned AsmVariant,
|
|
const char *ExtraCode) {
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
switch (ExtraCode[0]) {
|
|
default: return true; // Unknown modifier.
|
|
case 'b': // Print QImode register
|
|
case 'h': // Print QImode high register
|
|
case 'w': // Print HImode register
|
|
case 'k': // Print SImode register
|
|
case 'q': // Print SImode register
|
|
// These only apply to registers, ignore on mem.
|
|
break;
|
|
case 'P': // Don't print @PLT, but do print as memory.
|
|
printMemReference(MI, OpNo, "no-rip");
|
|
return false;
|
|
}
|
|
}
|
|
printMemReference(MI, OpNo);
|
|
return false;
|
|
}
|
|
|
|
|
|
void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
|
|
if (Subtarget->isTargetDarwin()) {
|
|
// All darwin targets use mach-o.
|
|
TargetLoweringObjectFileMachO &TLOFMacho =
|
|
static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
|
|
|
|
MachineModuleInfoMachO &MMIMacho =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>();
|
|
|
|
// Output stubs for dynamically-linked functions.
|
|
MachineModuleInfoMachO::SymbolListTy Stubs;
|
|
|
|
Stubs = MMIMacho.GetFnStubList();
|
|
if (!Stubs.empty()) {
|
|
const MCSection *TheSection =
|
|
TLOFMacho.getMachOSection("__IMPORT", "__jump_table",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE |
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
|
|
5, SectionKind::getMetadata());
|
|
OutStreamer.SwitchSection(TheSection);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
O << *Stubs[i].first << ":\n";
|
|
// Get the MCSymbol without the $stub suffix.
|
|
O << "\t.indirect_symbol " << *Stubs[i].second;
|
|
O << "\n\thlt ; hlt ; hlt ; hlt ; hlt\n";
|
|
}
|
|
O << '\n';
|
|
|
|
Stubs.clear();
|
|
}
|
|
|
|
// Output stubs for external and common global variables.
|
|
Stubs = MMIMacho.GetGVStubList();
|
|
if (!Stubs.empty()) {
|
|
const MCSection *TheSection =
|
|
TLOFMacho.getMachOSection("__IMPORT", "__pointers",
|
|
MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
|
|
SectionKind::getMetadata());
|
|
OutStreamer.SwitchSection(TheSection);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
O << *Stubs[i].first << ":\n\t.indirect_symbol " << *Stubs[i].second;
|
|
O << "\n\t.long\t0\n";
|
|
}
|
|
Stubs.clear();
|
|
}
|
|
|
|
Stubs = MMIMacho.GetHiddenGVStubList();
|
|
if (!Stubs.empty()) {
|
|
OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
|
|
EmitAlignment(2);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
O << *Stubs[i].first << ":\n" << MAI->getData32bitsDirective();
|
|
O << *Stubs[i].second << '\n';
|
|
}
|
|
Stubs.clear();
|
|
}
|
|
|
|
// Funny Darwin hack: This flag tells the linker that no global symbols
|
|
// contain code that falls through to other global symbols (e.g. the obvious
|
|
// implementation of multiple entry points). If this doesn't occur, the
|
|
// linker can safely perform dead code stripping. Since LLVM never
|
|
// generates code that does this, it is always safe to set.
|
|
OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
|
|
}
|
|
|
|
if (Subtarget->isTargetCOFF()) {
|
|
X86COFFMachineModuleInfo &COFFMMI =
|
|
MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
|
|
|
|
// Emit type information for external functions
|
|
for (X86COFFMachineModuleInfo::stub_iterator I = COFFMMI.stub_begin(),
|
|
E = COFFMMI.stub_end(); I != E; ++I) {
|
|
O << "\t.def\t " << I->getKeyData()
|
|
<< ";\t.scl\t" << COFF::C_EXT
|
|
<< ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
|
|
<< ";\t.endef\n";
|
|
}
|
|
|
|
if (Subtarget->isTargetCygMing()) {
|
|
// Necessary for dllexport support
|
|
std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
|
|
|
|
TargetLoweringObjectFileCOFF &TLOFCOFF =
|
|
static_cast<TargetLoweringObjectFileCOFF&>(getObjFileLowering());
|
|
|
|
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
if (I->hasDLLExportLinkage()) {
|
|
MCSymbol *Sym = GetGlobalValueSymbol(I);
|
|
COFFMMI.DecorateCygMingName(Sym, OutContext, I, *TM.getTargetData());
|
|
DLLExportedFns.push_back(Sym);
|
|
}
|
|
|
|
for (Module::const_global_iterator I = M.global_begin(),
|
|
E = M.global_end(); I != E; ++I)
|
|
if (I->hasDLLExportLinkage())
|
|
DLLExportedGlobals.push_back(GetGlobalValueSymbol(I));
|
|
|
|
// Output linker support code for dllexported globals on windows.
|
|
if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
|
|
OutStreamer.SwitchSection(TLOFCOFF.getCOFFSection(".section .drectve",
|
|
true,
|
|
SectionKind::getMetadata()));
|
|
for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i)
|
|
O << "\t.ascii \" -export:" << *DLLExportedGlobals[i] << ",data\"\n";
|
|
|
|
for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i)
|
|
O << "\t.ascii \" -export:" << *DLLExportedFns[i] << "\"\n";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Target Registry Stuff
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static MCInstPrinter *createX86MCInstPrinter(const Target &T,
|
|
unsigned SyntaxVariant,
|
|
const MCAsmInfo &MAI,
|
|
raw_ostream &O) {
|
|
if (SyntaxVariant == 0)
|
|
return new X86ATTInstPrinter(O, MAI);
|
|
if (SyntaxVariant == 1)
|
|
return new X86IntelInstPrinter(O, MAI);
|
|
return 0;
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeX86AsmPrinter() {
|
|
RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
|
|
RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);
|
|
|
|
TargetRegistry::RegisterMCInstPrinter(TheX86_32Target,createX86MCInstPrinter);
|
|
TargetRegistry::RegisterMCInstPrinter(TheX86_64Target,createX86MCInstPrinter);
|
|
}
|