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llvm-for-llvmta/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp

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2022-04-25 10:02:23 +02:00
//===-- MipsTargetStreamer.cpp - Mips Target Streamer Methods -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file provides Mips specific target streamer methods.
//
//===----------------------------------------------------------------------===//
#include "MipsTargetStreamer.h"
#include "MipsInstPrinter.h"
#include "MCTargetDesc/MipsABIInfo.h"
#include "MipsELFStreamer.h"
#include "MipsMCExpr.h"
#include "MipsMCTargetDesc.h"
#include "MipsTargetObjectFile.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbolELF.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
using namespace llvm;
namespace {
static cl::opt<bool> RoundSectionSizes(
"mips-round-section-sizes", cl::init(false),
cl::desc("Round section sizes up to the section alignment"), cl::Hidden);
} // end anonymous namespace
static bool isMicroMips(const MCSubtargetInfo *STI) {
return STI->getFeatureBits()[Mips::FeatureMicroMips];
}
MipsTargetStreamer::MipsTargetStreamer(MCStreamer &S)
: MCTargetStreamer(S), GPReg(Mips::GP), ModuleDirectiveAllowed(true) {
GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
}
void MipsTargetStreamer::emitDirectiveSetMicroMips() {}
void MipsTargetStreamer::emitDirectiveSetNoMicroMips() {}
void MipsTargetStreamer::setUsesMicroMips() {}
void MipsTargetStreamer::emitDirectiveSetMips16() {}
void MipsTargetStreamer::emitDirectiveSetNoMips16() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetReorder() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetNoReorder() {}
void MipsTargetStreamer::emitDirectiveSetMacro() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetNoMacro() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMsa() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetNoMsa() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMt() {}
void MipsTargetStreamer::emitDirectiveSetNoMt() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetCRC() {}
void MipsTargetStreamer::emitDirectiveSetNoCRC() {}
void MipsTargetStreamer::emitDirectiveSetVirt() {}
void MipsTargetStreamer::emitDirectiveSetNoVirt() {}
void MipsTargetStreamer::emitDirectiveSetGINV() {}
void MipsTargetStreamer::emitDirectiveSetNoGINV() {}
void MipsTargetStreamer::emitDirectiveSetAt() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetAtWithArg(unsigned RegNo) {
forbidModuleDirective();
}
void MipsTargetStreamer::emitDirectiveSetNoAt() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveEnd(StringRef Name) {}
void MipsTargetStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {}
void MipsTargetStreamer::emitDirectiveAbiCalls() {}
void MipsTargetStreamer::emitDirectiveNaN2008() {}
void MipsTargetStreamer::emitDirectiveNaNLegacy() {}
void MipsTargetStreamer::emitDirectiveOptionPic0() {}
void MipsTargetStreamer::emitDirectiveOptionPic2() {}
void MipsTargetStreamer::emitDirectiveInsn() { forbidModuleDirective(); }
void MipsTargetStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg) {}
void MipsTargetStreamer::emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) {}
void MipsTargetStreamer::emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff) {
}
void MipsTargetStreamer::emitDirectiveSetArch(StringRef Arch) {
forbidModuleDirective();
}
void MipsTargetStreamer::emitDirectiveSetMips0() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips1() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips2() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips3() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips4() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips5() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips32() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips32R2() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips32R3() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips32R5() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips32R6() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips64() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips64R2() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips64R3() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips64R5() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips64R6() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetPop() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetPush() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetSoftFloat() {
forbidModuleDirective();
}
void MipsTargetStreamer::emitDirectiveSetHardFloat() {
forbidModuleDirective();
}
void MipsTargetStreamer::emitDirectiveSetDsp() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetDspr2() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetNoDsp() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetMips3D() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetNoMips3D() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveCpAdd(unsigned RegNo) {}
void MipsTargetStreamer::emitDirectiveCpLoad(unsigned RegNo) {}
void MipsTargetStreamer::emitDirectiveCpLocal(unsigned RegNo) {
// .cplocal $reg
// This directive forces to use the alternate register for context pointer.
// For example
// .cplocal $4
// jal foo
// expands to
// ld $25, %call16(foo)($4)
// jalr $25
if (!getABI().IsN32() && !getABI().IsN64())
return;
GPReg = RegNo;
forbidModuleDirective();
}
bool MipsTargetStreamer::emitDirectiveCpRestore(
int Offset, function_ref<unsigned()> GetATReg, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
forbidModuleDirective();
return true;
}
void MipsTargetStreamer::emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset,
const MCSymbol &Sym, bool IsReg) {
}
void MipsTargetStreamer::emitDirectiveCpreturn(unsigned SaveLocation,
bool SaveLocationIsRegister) {}
void MipsTargetStreamer::emitDirectiveModuleFP() {}
void MipsTargetStreamer::emitDirectiveModuleOddSPReg() {
if (!ABIFlagsSection.OddSPReg && !ABIFlagsSection.Is32BitABI)
report_fatal_error("+nooddspreg is only valid for O32");
}
void MipsTargetStreamer::emitDirectiveModuleSoftFloat() {}
void MipsTargetStreamer::emitDirectiveModuleHardFloat() {}
void MipsTargetStreamer::emitDirectiveModuleMT() {}
void MipsTargetStreamer::emitDirectiveModuleCRC() {}
void MipsTargetStreamer::emitDirectiveModuleNoCRC() {}
void MipsTargetStreamer::emitDirectiveModuleVirt() {}
void MipsTargetStreamer::emitDirectiveModuleNoVirt() {}
void MipsTargetStreamer::emitDirectiveModuleGINV() {}
void MipsTargetStreamer::emitDirectiveModuleNoGINV() {}
void MipsTargetStreamer::emitDirectiveSetFp(
MipsABIFlagsSection::FpABIKind Value) {
forbidModuleDirective();
}
void MipsTargetStreamer::emitDirectiveSetOddSPReg() { forbidModuleDirective(); }
void MipsTargetStreamer::emitDirectiveSetNoOddSPReg() {
forbidModuleDirective();
}
void MipsTargetStreamer::emitR(unsigned Opcode, unsigned Reg0, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
MCInst TmpInst;
TmpInst.setOpcode(Opcode);
TmpInst.addOperand(MCOperand::createReg(Reg0));
TmpInst.setLoc(IDLoc);
getStreamer().emitInstruction(TmpInst, *STI);
}
void MipsTargetStreamer::emitRX(unsigned Opcode, unsigned Reg0, MCOperand Op1,
SMLoc IDLoc, const MCSubtargetInfo *STI) {
MCInst TmpInst;
TmpInst.setOpcode(Opcode);
TmpInst.addOperand(MCOperand::createReg(Reg0));
TmpInst.addOperand(Op1);
TmpInst.setLoc(IDLoc);
getStreamer().emitInstruction(TmpInst, *STI);
}
void MipsTargetStreamer::emitRI(unsigned Opcode, unsigned Reg0, int32_t Imm,
SMLoc IDLoc, const MCSubtargetInfo *STI) {
emitRX(Opcode, Reg0, MCOperand::createImm(Imm), IDLoc, STI);
}
void MipsTargetStreamer::emitRR(unsigned Opcode, unsigned Reg0, unsigned Reg1,
SMLoc IDLoc, const MCSubtargetInfo *STI) {
emitRX(Opcode, Reg0, MCOperand::createReg(Reg1), IDLoc, STI);
}
void MipsTargetStreamer::emitII(unsigned Opcode, int16_t Imm1, int16_t Imm2,
SMLoc IDLoc, const MCSubtargetInfo *STI) {
MCInst TmpInst;
TmpInst.setOpcode(Opcode);
TmpInst.addOperand(MCOperand::createImm(Imm1));
TmpInst.addOperand(MCOperand::createImm(Imm2));
TmpInst.setLoc(IDLoc);
getStreamer().emitInstruction(TmpInst, *STI);
}
void MipsTargetStreamer::emitRRX(unsigned Opcode, unsigned Reg0, unsigned Reg1,
MCOperand Op2, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
MCInst TmpInst;
TmpInst.setOpcode(Opcode);
TmpInst.addOperand(MCOperand::createReg(Reg0));
TmpInst.addOperand(MCOperand::createReg(Reg1));
TmpInst.addOperand(Op2);
TmpInst.setLoc(IDLoc);
getStreamer().emitInstruction(TmpInst, *STI);
}
void MipsTargetStreamer::emitRRR(unsigned Opcode, unsigned Reg0, unsigned Reg1,
unsigned Reg2, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
emitRRX(Opcode, Reg0, Reg1, MCOperand::createReg(Reg2), IDLoc, STI);
}
void MipsTargetStreamer::emitRRRX(unsigned Opcode, unsigned Reg0, unsigned Reg1,
unsigned Reg2, MCOperand Op3, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
MCInst TmpInst;
TmpInst.setOpcode(Opcode);
TmpInst.addOperand(MCOperand::createReg(Reg0));
TmpInst.addOperand(MCOperand::createReg(Reg1));
TmpInst.addOperand(MCOperand::createReg(Reg2));
TmpInst.addOperand(Op3);
TmpInst.setLoc(IDLoc);
getStreamer().emitInstruction(TmpInst, *STI);
}
void MipsTargetStreamer::emitRRI(unsigned Opcode, unsigned Reg0, unsigned Reg1,
int16_t Imm, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
emitRRX(Opcode, Reg0, Reg1, MCOperand::createImm(Imm), IDLoc, STI);
}
void MipsTargetStreamer::emitRRIII(unsigned Opcode, unsigned Reg0,
unsigned Reg1, int16_t Imm0, int16_t Imm1,
int16_t Imm2, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
MCInst TmpInst;
TmpInst.setOpcode(Opcode);
TmpInst.addOperand(MCOperand::createReg(Reg0));
TmpInst.addOperand(MCOperand::createReg(Reg1));
TmpInst.addOperand(MCOperand::createImm(Imm0));
TmpInst.addOperand(MCOperand::createImm(Imm1));
TmpInst.addOperand(MCOperand::createImm(Imm2));
TmpInst.setLoc(IDLoc);
getStreamer().emitInstruction(TmpInst, *STI);
}
void MipsTargetStreamer::emitAddu(unsigned DstReg, unsigned SrcReg,
unsigned TrgReg, bool Is64Bit,
const MCSubtargetInfo *STI) {
emitRRR(Is64Bit ? Mips::DADDu : Mips::ADDu, DstReg, SrcReg, TrgReg, SMLoc(),
STI);
}
void MipsTargetStreamer::emitDSLL(unsigned DstReg, unsigned SrcReg,
int16_t ShiftAmount, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
if (ShiftAmount >= 32) {
emitRRI(Mips::DSLL32, DstReg, SrcReg, ShiftAmount - 32, IDLoc, STI);
return;
}
emitRRI(Mips::DSLL, DstReg, SrcReg, ShiftAmount, IDLoc, STI);
}
void MipsTargetStreamer::emitEmptyDelaySlot(bool hasShortDelaySlot, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
if (hasShortDelaySlot)
emitRR(Mips::MOVE16_MM, Mips::ZERO, Mips::ZERO, IDLoc, STI);
else
emitRRI(Mips::SLL, Mips::ZERO, Mips::ZERO, 0, IDLoc, STI);
}
void MipsTargetStreamer::emitNop(SMLoc IDLoc, const MCSubtargetInfo *STI) {
if (isMicroMips(STI))
emitRR(Mips::MOVE16_MM, Mips::ZERO, Mips::ZERO, IDLoc, STI);
else
emitRRI(Mips::SLL, Mips::ZERO, Mips::ZERO, 0, IDLoc, STI);
}
/// Emit the $gp restore operation for .cprestore.
void MipsTargetStreamer::emitGPRestore(int Offset, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
emitLoadWithImmOffset(Mips::LW, GPReg, Mips::SP, Offset, GPReg, IDLoc, STI);
}
/// Emit a store instruction with an immediate offset.
void MipsTargetStreamer::emitStoreWithImmOffset(
unsigned Opcode, unsigned SrcReg, unsigned BaseReg, int64_t Offset,
function_ref<unsigned()> GetATReg, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
if (isInt<16>(Offset)) {
emitRRI(Opcode, SrcReg, BaseReg, Offset, IDLoc, STI);
return;
}
// sw $8, offset($8) => lui $at, %hi(offset)
// add $at, $at, $8
// sw $8, %lo(offset)($at)
unsigned ATReg = GetATReg();
if (!ATReg)
return;
unsigned LoOffset = Offset & 0x0000ffff;
unsigned HiOffset = (Offset & 0xffff0000) >> 16;
// If msb of LoOffset is 1(negative number) we must increment HiOffset
// to account for the sign-extension of the low part.
if (LoOffset & 0x8000)
HiOffset++;
// Generate the base address in ATReg.
emitRI(Mips::LUi, ATReg, HiOffset, IDLoc, STI);
if (BaseReg != Mips::ZERO)
emitRRR(Mips::ADDu, ATReg, ATReg, BaseReg, IDLoc, STI);
// Emit the store with the adjusted base and offset.
emitRRI(Opcode, SrcReg, ATReg, LoOffset, IDLoc, STI);
}
/// Emit a load instruction with an immediate offset. DstReg and TmpReg are
/// permitted to be the same register iff DstReg is distinct from BaseReg and
/// DstReg is a GPR. It is the callers responsibility to identify such cases
/// and pass the appropriate register in TmpReg.
void MipsTargetStreamer::emitLoadWithImmOffset(unsigned Opcode, unsigned DstReg,
unsigned BaseReg, int64_t Offset,
unsigned TmpReg, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
if (isInt<16>(Offset)) {
emitRRI(Opcode, DstReg, BaseReg, Offset, IDLoc, STI);
return;
}
// 1) lw $8, offset($9) => lui $8, %hi(offset)
// add $8, $8, $9
// lw $8, %lo(offset)($9)
// 2) lw $8, offset($8) => lui $at, %hi(offset)
// add $at, $at, $8
// lw $8, %lo(offset)($at)
unsigned LoOffset = Offset & 0x0000ffff;
unsigned HiOffset = (Offset & 0xffff0000) >> 16;
// If msb of LoOffset is 1(negative number) we must increment HiOffset
// to account for the sign-extension of the low part.
if (LoOffset & 0x8000)
HiOffset++;
// Generate the base address in TmpReg.
emitRI(Mips::LUi, TmpReg, HiOffset, IDLoc, STI);
if (BaseReg != Mips::ZERO)
emitRRR(Mips::ADDu, TmpReg, TmpReg, BaseReg, IDLoc, STI);
// Emit the load with the adjusted base and offset.
emitRRI(Opcode, DstReg, TmpReg, LoOffset, IDLoc, STI);
}
MipsTargetAsmStreamer::MipsTargetAsmStreamer(MCStreamer &S,
formatted_raw_ostream &OS)
: MipsTargetStreamer(S), OS(OS) {}
void MipsTargetAsmStreamer::emitDirectiveSetMicroMips() {
OS << "\t.set\tmicromips\n";
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoMicroMips() {
OS << "\t.set\tnomicromips\n";
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips16() {
OS << "\t.set\tmips16\n";
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoMips16() {
OS << "\t.set\tnomips16\n";
MipsTargetStreamer::emitDirectiveSetNoMips16();
}
void MipsTargetAsmStreamer::emitDirectiveSetReorder() {
OS << "\t.set\treorder\n";
MipsTargetStreamer::emitDirectiveSetReorder();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoReorder() {
OS << "\t.set\tnoreorder\n";
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveSetMacro() {
OS << "\t.set\tmacro\n";
MipsTargetStreamer::emitDirectiveSetMacro();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoMacro() {
OS << "\t.set\tnomacro\n";
MipsTargetStreamer::emitDirectiveSetNoMacro();
}
void MipsTargetAsmStreamer::emitDirectiveSetMsa() {
OS << "\t.set\tmsa\n";
MipsTargetStreamer::emitDirectiveSetMsa();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoMsa() {
OS << "\t.set\tnomsa\n";
MipsTargetStreamer::emitDirectiveSetNoMsa();
}
void MipsTargetAsmStreamer::emitDirectiveSetMt() {
OS << "\t.set\tmt\n";
MipsTargetStreamer::emitDirectiveSetMt();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoMt() {
OS << "\t.set\tnomt\n";
MipsTargetStreamer::emitDirectiveSetNoMt();
}
void MipsTargetAsmStreamer::emitDirectiveSetCRC() {
OS << "\t.set\tcrc\n";
MipsTargetStreamer::emitDirectiveSetCRC();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoCRC() {
OS << "\t.set\tnocrc\n";
MipsTargetStreamer::emitDirectiveSetNoCRC();
}
void MipsTargetAsmStreamer::emitDirectiveSetVirt() {
OS << "\t.set\tvirt\n";
MipsTargetStreamer::emitDirectiveSetVirt();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoVirt() {
OS << "\t.set\tnovirt\n";
MipsTargetStreamer::emitDirectiveSetNoVirt();
}
void MipsTargetAsmStreamer::emitDirectiveSetGINV() {
OS << "\t.set\tginv\n";
MipsTargetStreamer::emitDirectiveSetGINV();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoGINV() {
OS << "\t.set\tnoginv\n";
MipsTargetStreamer::emitDirectiveSetNoGINV();
}
void MipsTargetAsmStreamer::emitDirectiveSetAt() {
OS << "\t.set\tat\n";
MipsTargetStreamer::emitDirectiveSetAt();
}
void MipsTargetAsmStreamer::emitDirectiveSetAtWithArg(unsigned RegNo) {
OS << "\t.set\tat=$" << Twine(RegNo) << "\n";
MipsTargetStreamer::emitDirectiveSetAtWithArg(RegNo);
}
void MipsTargetAsmStreamer::emitDirectiveSetNoAt() {
OS << "\t.set\tnoat\n";
MipsTargetStreamer::emitDirectiveSetNoAt();
}
void MipsTargetAsmStreamer::emitDirectiveEnd(StringRef Name) {
OS << "\t.end\t" << Name << '\n';
}
void MipsTargetAsmStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
OS << "\t.ent\t" << Symbol.getName() << '\n';
}
void MipsTargetAsmStreamer::emitDirectiveAbiCalls() { OS << "\t.abicalls\n"; }
void MipsTargetAsmStreamer::emitDirectiveNaN2008() { OS << "\t.nan\t2008\n"; }
void MipsTargetAsmStreamer::emitDirectiveNaNLegacy() {
OS << "\t.nan\tlegacy\n";
}
void MipsTargetAsmStreamer::emitDirectiveOptionPic0() {
OS << "\t.option\tpic0\n";
}
void MipsTargetAsmStreamer::emitDirectiveOptionPic2() {
OS << "\t.option\tpic2\n";
}
void MipsTargetAsmStreamer::emitDirectiveInsn() {
MipsTargetStreamer::emitDirectiveInsn();
OS << "\t.insn\n";
}
void MipsTargetAsmStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg) {
OS << "\t.frame\t$"
<< StringRef(MipsInstPrinter::getRegisterName(StackReg)).lower() << ","
<< StackSize << ",$"
<< StringRef(MipsInstPrinter::getRegisterName(ReturnReg)).lower() << '\n';
}
void MipsTargetAsmStreamer::emitDirectiveSetArch(StringRef Arch) {
OS << "\t.set arch=" << Arch << "\n";
MipsTargetStreamer::emitDirectiveSetArch(Arch);
}
void MipsTargetAsmStreamer::emitDirectiveSetMips0() {
OS << "\t.set\tmips0\n";
MipsTargetStreamer::emitDirectiveSetMips0();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips1() {
OS << "\t.set\tmips1\n";
MipsTargetStreamer::emitDirectiveSetMips1();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips2() {
OS << "\t.set\tmips2\n";
MipsTargetStreamer::emitDirectiveSetMips2();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips3() {
OS << "\t.set\tmips3\n";
MipsTargetStreamer::emitDirectiveSetMips3();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips4() {
OS << "\t.set\tmips4\n";
MipsTargetStreamer::emitDirectiveSetMips4();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips5() {
OS << "\t.set\tmips5\n";
MipsTargetStreamer::emitDirectiveSetMips5();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips32() {
OS << "\t.set\tmips32\n";
MipsTargetStreamer::emitDirectiveSetMips32();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips32R2() {
OS << "\t.set\tmips32r2\n";
MipsTargetStreamer::emitDirectiveSetMips32R2();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips32R3() {
OS << "\t.set\tmips32r3\n";
MipsTargetStreamer::emitDirectiveSetMips32R3();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips32R5() {
OS << "\t.set\tmips32r5\n";
MipsTargetStreamer::emitDirectiveSetMips32R5();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips32R6() {
OS << "\t.set\tmips32r6\n";
MipsTargetStreamer::emitDirectiveSetMips32R6();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips64() {
OS << "\t.set\tmips64\n";
MipsTargetStreamer::emitDirectiveSetMips64();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips64R2() {
OS << "\t.set\tmips64r2\n";
MipsTargetStreamer::emitDirectiveSetMips64R2();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips64R3() {
OS << "\t.set\tmips64r3\n";
MipsTargetStreamer::emitDirectiveSetMips64R3();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips64R5() {
OS << "\t.set\tmips64r5\n";
MipsTargetStreamer::emitDirectiveSetMips64R5();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips64R6() {
OS << "\t.set\tmips64r6\n";
MipsTargetStreamer::emitDirectiveSetMips64R6();
}
void MipsTargetAsmStreamer::emitDirectiveSetDsp() {
OS << "\t.set\tdsp\n";
MipsTargetStreamer::emitDirectiveSetDsp();
}
void MipsTargetAsmStreamer::emitDirectiveSetDspr2() {
OS << "\t.set\tdspr2\n";
MipsTargetStreamer::emitDirectiveSetDspr2();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoDsp() {
OS << "\t.set\tnodsp\n";
MipsTargetStreamer::emitDirectiveSetNoDsp();
}
void MipsTargetAsmStreamer::emitDirectiveSetMips3D() {
OS << "\t.set\tmips3d\n";
MipsTargetStreamer::emitDirectiveSetMips3D();
}
void MipsTargetAsmStreamer::emitDirectiveSetNoMips3D() {
OS << "\t.set\tnomips3d\n";
MipsTargetStreamer::emitDirectiveSetNoMips3D();
}
void MipsTargetAsmStreamer::emitDirectiveSetPop() {
OS << "\t.set\tpop\n";
MipsTargetStreamer::emitDirectiveSetPop();
}
void MipsTargetAsmStreamer::emitDirectiveSetPush() {
OS << "\t.set\tpush\n";
MipsTargetStreamer::emitDirectiveSetPush();
}
void MipsTargetAsmStreamer::emitDirectiveSetSoftFloat() {
OS << "\t.set\tsoftfloat\n";
MipsTargetStreamer::emitDirectiveSetSoftFloat();
}
void MipsTargetAsmStreamer::emitDirectiveSetHardFloat() {
OS << "\t.set\thardfloat\n";
MipsTargetStreamer::emitDirectiveSetHardFloat();
}
// Print a 32 bit hex number with all numbers.
static void printHex32(unsigned Value, raw_ostream &OS) {
OS << "0x";
for (int i = 7; i >= 0; i--)
OS.write_hex((Value & (0xF << (i * 4))) >> (i * 4));
}
void MipsTargetAsmStreamer::emitMask(unsigned CPUBitmask,
int CPUTopSavedRegOff) {
OS << "\t.mask \t";
printHex32(CPUBitmask, OS);
OS << ',' << CPUTopSavedRegOff << '\n';
}
void MipsTargetAsmStreamer::emitFMask(unsigned FPUBitmask,
int FPUTopSavedRegOff) {
OS << "\t.fmask\t";
printHex32(FPUBitmask, OS);
OS << "," << FPUTopSavedRegOff << '\n';
}
void MipsTargetAsmStreamer::emitDirectiveCpAdd(unsigned RegNo) {
OS << "\t.cpadd\t$"
<< StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << "\n";
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveCpLoad(unsigned RegNo) {
OS << "\t.cpload\t$"
<< StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << "\n";
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveCpLocal(unsigned RegNo) {
OS << "\t.cplocal\t$"
<< StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << "\n";
MipsTargetStreamer::emitDirectiveCpLocal(RegNo);
}
bool MipsTargetAsmStreamer::emitDirectiveCpRestore(
int Offset, function_ref<unsigned()> GetATReg, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
MipsTargetStreamer::emitDirectiveCpRestore(Offset, GetATReg, IDLoc, STI);
OS << "\t.cprestore\t" << Offset << "\n";
return true;
}
void MipsTargetAsmStreamer::emitDirectiveCpsetup(unsigned RegNo,
int RegOrOffset,
const MCSymbol &Sym,
bool IsReg) {
OS << "\t.cpsetup\t$"
<< StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << ", ";
if (IsReg)
OS << "$"
<< StringRef(MipsInstPrinter::getRegisterName(RegOrOffset)).lower();
else
OS << RegOrOffset;
OS << ", ";
OS << Sym.getName();
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveCpreturn(unsigned SaveLocation,
bool SaveLocationIsRegister) {
OS << "\t.cpreturn";
forbidModuleDirective();
}
void MipsTargetAsmStreamer::emitDirectiveModuleFP() {
MipsABIFlagsSection::FpABIKind FpABI = ABIFlagsSection.getFpABI();
if (FpABI == MipsABIFlagsSection::FpABIKind::SOFT)
OS << "\t.module\tsoftfloat\n";
else
OS << "\t.module\tfp=" << ABIFlagsSection.getFpABIString(FpABI) << "\n";
}
void MipsTargetAsmStreamer::emitDirectiveSetFp(
MipsABIFlagsSection::FpABIKind Value) {
MipsTargetStreamer::emitDirectiveSetFp(Value);
OS << "\t.set\tfp=";
OS << ABIFlagsSection.getFpABIString(Value) << "\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleOddSPReg() {
MipsTargetStreamer::emitDirectiveModuleOddSPReg();
OS << "\t.module\t" << (ABIFlagsSection.OddSPReg ? "" : "no") << "oddspreg\n";
}
void MipsTargetAsmStreamer::emitDirectiveSetOddSPReg() {
MipsTargetStreamer::emitDirectiveSetOddSPReg();
OS << "\t.set\toddspreg\n";
}
void MipsTargetAsmStreamer::emitDirectiveSetNoOddSPReg() {
MipsTargetStreamer::emitDirectiveSetNoOddSPReg();
OS << "\t.set\tnooddspreg\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleSoftFloat() {
OS << "\t.module\tsoftfloat\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleHardFloat() {
OS << "\t.module\thardfloat\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleMT() {
OS << "\t.module\tmt\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleCRC() {
OS << "\t.module\tcrc\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleNoCRC() {
OS << "\t.module\tnocrc\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleVirt() {
OS << "\t.module\tvirt\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleNoVirt() {
OS << "\t.module\tnovirt\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleGINV() {
OS << "\t.module\tginv\n";
}
void MipsTargetAsmStreamer::emitDirectiveModuleNoGINV() {
OS << "\t.module\tnoginv\n";
}
// This part is for ELF object output.
MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S,
const MCSubtargetInfo &STI)
: MipsTargetStreamer(S), MicroMipsEnabled(false), STI(STI) {
MCAssembler &MCA = getStreamer().getAssembler();
// It's possible that MCObjectFileInfo isn't fully initialized at this point
// due to an initialization order problem where LLVMTargetMachine creates the
// target streamer before TargetLoweringObjectFile calls
// InitializeMCObjectFileInfo. There doesn't seem to be a single place that
// covers all cases so this statement covers most cases and direct object
// emission must call setPic() once MCObjectFileInfo has been initialized. The
// cases we don't handle here are covered by MipsAsmPrinter.
Pic = MCA.getContext().getObjectFileInfo()->isPositionIndependent();
const FeatureBitset &Features = STI.getFeatureBits();
// Set the header flags that we can in the constructor.
// FIXME: This is a fairly terrible hack. We set the rest
// of these in the destructor. The problem here is two-fold:
//
// a: Some of the eflags can be set/reset by directives.
// b: There aren't any usage paths that initialize the ABI
// pointer until after we initialize either an assembler
// or the target machine.
// We can fix this by making the target streamer construct
// the ABI, but this is fraught with wide ranging dependency
// issues as well.
unsigned EFlags = MCA.getELFHeaderEFlags();
// FIXME: Fix a dependency issue by instantiating the ABI object to some
// default based off the triple. The triple doesn't describe the target
// fully, but any external user of the API that uses the MCTargetStreamer
// would otherwise crash on assertion failure.
ABI = MipsABIInfo(
STI.getTargetTriple().getArch() == Triple::ArchType::mipsel ||
STI.getTargetTriple().getArch() == Triple::ArchType::mips
? MipsABIInfo::O32()
: MipsABIInfo::N64());
// Architecture
if (Features[Mips::FeatureMips64r6])
EFlags |= ELF::EF_MIPS_ARCH_64R6;
else if (Features[Mips::FeatureMips64r2] ||
Features[Mips::FeatureMips64r3] ||
Features[Mips::FeatureMips64r5])
EFlags |= ELF::EF_MIPS_ARCH_64R2;
else if (Features[Mips::FeatureMips64])
EFlags |= ELF::EF_MIPS_ARCH_64;
else if (Features[Mips::FeatureMips5])
EFlags |= ELF::EF_MIPS_ARCH_5;
else if (Features[Mips::FeatureMips4])
EFlags |= ELF::EF_MIPS_ARCH_4;
else if (Features[Mips::FeatureMips3])
EFlags |= ELF::EF_MIPS_ARCH_3;
else if (Features[Mips::FeatureMips32r6])
EFlags |= ELF::EF_MIPS_ARCH_32R6;
else if (Features[Mips::FeatureMips32r2] ||
Features[Mips::FeatureMips32r3] ||
Features[Mips::FeatureMips32r5])
EFlags |= ELF::EF_MIPS_ARCH_32R2;
else if (Features[Mips::FeatureMips32])
EFlags |= ELF::EF_MIPS_ARCH_32;
else if (Features[Mips::FeatureMips2])
EFlags |= ELF::EF_MIPS_ARCH_2;
else
EFlags |= ELF::EF_MIPS_ARCH_1;
// Machine
if (Features[Mips::FeatureCnMips])
EFlags |= ELF::EF_MIPS_MACH_OCTEON;
// Other options.
if (Features[Mips::FeatureNaN2008])
EFlags |= ELF::EF_MIPS_NAN2008;
MCA.setELFHeaderEFlags(EFlags);
}
void MipsTargetELFStreamer::emitLabel(MCSymbol *S) {
auto *Symbol = cast<MCSymbolELF>(S);
getStreamer().getAssembler().registerSymbol(*Symbol);
uint8_t Type = Symbol->getType();
if (Type != ELF::STT_FUNC)
return;
if (isMicroMipsEnabled())
Symbol->setOther(ELF::STO_MIPS_MICROMIPS);
}
void MipsTargetELFStreamer::finish() {
MCAssembler &MCA = getStreamer().getAssembler();
const MCObjectFileInfo &OFI = *MCA.getContext().getObjectFileInfo();
// .bss, .text and .data are always at least 16-byte aligned.
MCSection &TextSection = *OFI.getTextSection();
MCA.registerSection(TextSection);
MCSection &DataSection = *OFI.getDataSection();
MCA.registerSection(DataSection);
MCSection &BSSSection = *OFI.getBSSSection();
MCA.registerSection(BSSSection);
TextSection.setAlignment(Align(std::max(16u, TextSection.getAlignment())));
DataSection.setAlignment(Align(std::max(16u, DataSection.getAlignment())));
BSSSection.setAlignment(Align(std::max(16u, BSSSection.getAlignment())));
if (RoundSectionSizes) {
// Make sections sizes a multiple of the alignment. This is useful for
// verifying the output of IAS against the output of other assemblers but
// it's not necessary to produce a correct object and increases section
// size.
MCStreamer &OS = getStreamer();
for (MCSection &S : MCA) {
MCSectionELF &Section = static_cast<MCSectionELF &>(S);
unsigned Alignment = Section.getAlignment();
if (Alignment) {
OS.SwitchSection(&Section);
if (Section.UseCodeAlign())
OS.emitCodeAlignment(Alignment, Alignment);
else
OS.emitValueToAlignment(Alignment, 0, 1, Alignment);
}
}
}
const FeatureBitset &Features = STI.getFeatureBits();
// Update e_header flags. See the FIXME and comment above in
// the constructor for a full rundown on this.
unsigned EFlags = MCA.getELFHeaderEFlags();
// ABI
// N64 does not require any ABI bits.
if (getABI().IsO32())
EFlags |= ELF::EF_MIPS_ABI_O32;
else if (getABI().IsN32())
EFlags |= ELF::EF_MIPS_ABI2;
if (Features[Mips::FeatureGP64Bit]) {
if (getABI().IsO32())
EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
} else if (Features[Mips::FeatureMips64r2] || Features[Mips::FeatureMips64])
EFlags |= ELF::EF_MIPS_32BITMODE;
// -mplt is not implemented but we should act as if it was
// given.
if (!Features[Mips::FeatureNoABICalls])
EFlags |= ELF::EF_MIPS_CPIC;
if (Pic)
EFlags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC;
MCA.setELFHeaderEFlags(EFlags);
// Emit all the option records.
// At the moment we are only emitting .Mips.options (ODK_REGINFO) and
// .reginfo.
MipsELFStreamer &MEF = static_cast<MipsELFStreamer &>(Streamer);
MEF.EmitMipsOptionRecords();
emitMipsAbiFlags();
}
void MipsTargetELFStreamer::emitAssignment(MCSymbol *S, const MCExpr *Value) {
auto *Symbol = cast<MCSymbolELF>(S);
// If on rhs is micromips symbol then mark Symbol as microMips.
if (Value->getKind() != MCExpr::SymbolRef)
return;
const auto &RhsSym = cast<MCSymbolELF>(
static_cast<const MCSymbolRefExpr *>(Value)->getSymbol());
if (!(RhsSym.getOther() & ELF::STO_MIPS_MICROMIPS))
return;
Symbol->setOther(ELF::STO_MIPS_MICROMIPS);
}
MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
return static_cast<MCELFStreamer &>(Streamer);
}
void MipsTargetELFStreamer::emitDirectiveSetMicroMips() {
MicroMipsEnabled = true;
forbidModuleDirective();
}
void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() {
MicroMipsEnabled = false;
forbidModuleDirective();
}
void MipsTargetELFStreamer::setUsesMicroMips() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_MICROMIPS;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveSetMips16() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_ARCH_ASE_M16;
MCA.setELFHeaderEFlags(Flags);
forbidModuleDirective();
}
void MipsTargetELFStreamer::emitDirectiveSetNoReorder() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_NOREORDER;
MCA.setELFHeaderEFlags(Flags);
forbidModuleDirective();
}
void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
MCAssembler &MCA = getStreamer().getAssembler();
MCContext &Context = MCA.getContext();
MCStreamer &OS = getStreamer();
MCSectionELF *Sec = Context.getELFSection(".pdr", ELF::SHT_PROGBITS, 0);
MCSymbol *Sym = Context.getOrCreateSymbol(Name);
const MCSymbolRefExpr *ExprRef =
MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, Context);
MCA.registerSection(*Sec);
Sec->setAlignment(Align(4));
OS.PushSection();
OS.SwitchSection(Sec);
OS.emitValueImpl(ExprRef, 4);
OS.emitIntValue(GPRInfoSet ? GPRBitMask : 0, 4); // reg_mask
OS.emitIntValue(GPRInfoSet ? GPROffset : 0, 4); // reg_offset
OS.emitIntValue(FPRInfoSet ? FPRBitMask : 0, 4); // fpreg_mask
OS.emitIntValue(FPRInfoSet ? FPROffset : 0, 4); // fpreg_offset
OS.emitIntValue(FrameInfoSet ? FrameOffset : 0, 4); // frame_offset
OS.emitIntValue(FrameInfoSet ? FrameReg : 0, 4); // frame_reg
OS.emitIntValue(FrameInfoSet ? ReturnReg : 0, 4); // return_reg
// The .end directive marks the end of a procedure. Invalidate
// the information gathered up until this point.
GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
OS.PopSection();
// .end also implicitly sets the size.
MCSymbol *CurPCSym = Context.createTempSymbol();
OS.emitLabel(CurPCSym);
const MCExpr *Size = MCBinaryExpr::createSub(
MCSymbolRefExpr::create(CurPCSym, MCSymbolRefExpr::VK_None, Context),
ExprRef, Context);
// The ELFObjectWriter can determine the absolute size as it has access to
// the layout information of the assembly file, so a size expression rather
// than an absolute value is ok here.
static_cast<MCSymbolELF *>(Sym)->setSize(Size);
}
void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
// .ent also acts like an implicit '.type symbol, STT_FUNC'
static_cast<const MCSymbolELF &>(Symbol).setType(ELF::STT_FUNC);
}
void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveNaN2008() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_NAN2008;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveNaNLegacy() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags &= ~ELF::EF_MIPS_NAN2008;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveOptionPic0() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
// This option overrides other PIC options like -KPIC.
Pic = false;
Flags &= ~ELF::EF_MIPS_PIC;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveOptionPic2() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Pic = true;
// NOTE: We are following the GAS behaviour here which means the directive
// 'pic2' also sets the CPIC bit in the ELF header. This is different from
// what is stated in the SYSV ABI which consider the bits EF_MIPS_PIC and
// EF_MIPS_CPIC to be mutually exclusive.
Flags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveInsn() {
MipsTargetStreamer::emitDirectiveInsn();
MipsELFStreamer &MEF = static_cast<MipsELFStreamer &>(Streamer);
MEF.createPendingLabelRelocs();
}
void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg_) {
MCContext &Context = getStreamer().getAssembler().getContext();
const MCRegisterInfo *RegInfo = Context.getRegisterInfo();
FrameInfoSet = true;
FrameReg = RegInfo->getEncodingValue(StackReg);
FrameOffset = StackSize;
ReturnReg = RegInfo->getEncodingValue(ReturnReg_);
}
void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask,
int CPUTopSavedRegOff) {
GPRInfoSet = true;
GPRBitMask = CPUBitmask;
GPROffset = CPUTopSavedRegOff;
}
void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask,
int FPUTopSavedRegOff) {
FPRInfoSet = true;
FPRBitMask = FPUBitmask;
FPROffset = FPUTopSavedRegOff;
}
void MipsTargetELFStreamer::emitDirectiveCpAdd(unsigned RegNo) {
// .cpadd $reg
// This directive inserts code to add $gp to the argument's register
// when support for position independent code is enabled.
if (!Pic)
return;
emitAddu(RegNo, RegNo, GPReg, getABI().IsN64(), &STI);
forbidModuleDirective();
}
void MipsTargetELFStreamer::emitDirectiveCpLoad(unsigned RegNo) {
// .cpload $reg
// This directive expands to:
// lui $gp, %hi(_gp_disp)
// addui $gp, $gp, %lo(_gp_disp)
// addu $gp, $gp, $reg
// when support for position independent code is enabled.
if (!Pic || (getABI().IsN32() || getABI().IsN64()))
return;
// There's a GNU extension controlled by -mno-shared that allows
// locally-binding symbols to be accessed using absolute addresses.
// This is currently not supported. When supported -mno-shared makes
// .cpload expand to:
// lui $gp, %hi(__gnu_local_gp)
// addiu $gp, $gp, %lo(__gnu_local_gp)
StringRef SymName("_gp_disp");
MCAssembler &MCA = getStreamer().getAssembler();
MCSymbol *GP_Disp = MCA.getContext().getOrCreateSymbol(SymName);
MCA.registerSymbol(*GP_Disp);
MCInst TmpInst;
TmpInst.setOpcode(Mips::LUi);
TmpInst.addOperand(MCOperand::createReg(GPReg));
const MCExpr *HiSym = MipsMCExpr::create(
MipsMCExpr::MEK_HI,
MCSymbolRefExpr::create("_gp_disp", MCSymbolRefExpr::VK_None,
MCA.getContext()),
MCA.getContext());
TmpInst.addOperand(MCOperand::createExpr(HiSym));
getStreamer().emitInstruction(TmpInst, STI);
TmpInst.clear();
TmpInst.setOpcode(Mips::ADDiu);
TmpInst.addOperand(MCOperand::createReg(GPReg));
TmpInst.addOperand(MCOperand::createReg(GPReg));
const MCExpr *LoSym = MipsMCExpr::create(
MipsMCExpr::MEK_LO,
MCSymbolRefExpr::create("_gp_disp", MCSymbolRefExpr::VK_None,
MCA.getContext()),
MCA.getContext());
TmpInst.addOperand(MCOperand::createExpr(LoSym));
getStreamer().emitInstruction(TmpInst, STI);
TmpInst.clear();
TmpInst.setOpcode(Mips::ADDu);
TmpInst.addOperand(MCOperand::createReg(GPReg));
TmpInst.addOperand(MCOperand::createReg(GPReg));
TmpInst.addOperand(MCOperand::createReg(RegNo));
getStreamer().emitInstruction(TmpInst, STI);
forbidModuleDirective();
}
void MipsTargetELFStreamer::emitDirectiveCpLocal(unsigned RegNo) {
if (Pic)
MipsTargetStreamer::emitDirectiveCpLocal(RegNo);
}
bool MipsTargetELFStreamer::emitDirectiveCpRestore(
int Offset, function_ref<unsigned()> GetATReg, SMLoc IDLoc,
const MCSubtargetInfo *STI) {
MipsTargetStreamer::emitDirectiveCpRestore(Offset, GetATReg, IDLoc, STI);
// .cprestore offset
// When PIC mode is enabled and the O32 ABI is used, this directive expands
// to:
// sw $gp, offset($sp)
// and adds a corresponding LW after every JAL.
// Note that .cprestore is ignored if used with the N32 and N64 ABIs or if it
// is used in non-PIC mode.
if (!Pic || (getABI().IsN32() || getABI().IsN64()))
return true;
// Store the $gp on the stack.
emitStoreWithImmOffset(Mips::SW, GPReg, Mips::SP, Offset, GetATReg, IDLoc,
STI);
return true;
}
void MipsTargetELFStreamer::emitDirectiveCpsetup(unsigned RegNo,
int RegOrOffset,
const MCSymbol &Sym,
bool IsReg) {
// Only N32 and N64 emit anything for .cpsetup iff PIC is set.
if (!Pic || !(getABI().IsN32() || getABI().IsN64()))
return;
forbidModuleDirective();
MCAssembler &MCA = getStreamer().getAssembler();
MCInst Inst;
// Either store the old $gp in a register or on the stack
if (IsReg) {
// move $save, $gpreg
emitRRR(Mips::OR64, RegOrOffset, GPReg, Mips::ZERO, SMLoc(), &STI);
} else {
// sd $gpreg, offset($sp)
emitRRI(Mips::SD, GPReg, Mips::SP, RegOrOffset, SMLoc(), &STI);
}
if (getABI().IsN32()) {
MCSymbol *GPSym = MCA.getContext().getOrCreateSymbol("__gnu_local_gp");
const MipsMCExpr *HiExpr = MipsMCExpr::create(
MipsMCExpr::MEK_HI, MCSymbolRefExpr::create(GPSym, MCA.getContext()),
MCA.getContext());
const MipsMCExpr *LoExpr = MipsMCExpr::create(
MipsMCExpr::MEK_LO, MCSymbolRefExpr::create(GPSym, MCA.getContext()),
MCA.getContext());
// lui $gp, %hi(__gnu_local_gp)
emitRX(Mips::LUi, GPReg, MCOperand::createExpr(HiExpr), SMLoc(), &STI);
// addiu $gp, $gp, %lo(__gnu_local_gp)
emitRRX(Mips::ADDiu, GPReg, GPReg, MCOperand::createExpr(LoExpr), SMLoc(),
&STI);
return;
}
const MipsMCExpr *HiExpr = MipsMCExpr::createGpOff(
MipsMCExpr::MEK_HI, MCSymbolRefExpr::create(&Sym, MCA.getContext()),
MCA.getContext());
const MipsMCExpr *LoExpr = MipsMCExpr::createGpOff(
MipsMCExpr::MEK_LO, MCSymbolRefExpr::create(&Sym, MCA.getContext()),
MCA.getContext());
// lui $gp, %hi(%neg(%gp_rel(funcSym)))
emitRX(Mips::LUi, GPReg, MCOperand::createExpr(HiExpr), SMLoc(), &STI);
// addiu $gp, $gp, %lo(%neg(%gp_rel(funcSym)))
emitRRX(Mips::ADDiu, GPReg, GPReg, MCOperand::createExpr(LoExpr), SMLoc(),
&STI);
// daddu $gp, $gp, $funcreg
emitRRR(Mips::DADDu, GPReg, GPReg, RegNo, SMLoc(), &STI);
}
void MipsTargetELFStreamer::emitDirectiveCpreturn(unsigned SaveLocation,
bool SaveLocationIsRegister) {
// Only N32 and N64 emit anything for .cpreturn iff PIC is set.
if (!Pic || !(getABI().IsN32() || getABI().IsN64()))
return;
MCInst Inst;
// Either restore the old $gp from a register or on the stack
if (SaveLocationIsRegister) {
Inst.setOpcode(Mips::OR);
Inst.addOperand(MCOperand::createReg(GPReg));
Inst.addOperand(MCOperand::createReg(SaveLocation));
Inst.addOperand(MCOperand::createReg(Mips::ZERO));
} else {
Inst.setOpcode(Mips::LD);
Inst.addOperand(MCOperand::createReg(GPReg));
Inst.addOperand(MCOperand::createReg(Mips::SP));
Inst.addOperand(MCOperand::createImm(SaveLocation));
}
getStreamer().emitInstruction(Inst, STI);
forbidModuleDirective();
}
void MipsTargetELFStreamer::emitMipsAbiFlags() {
MCAssembler &MCA = getStreamer().getAssembler();
MCContext &Context = MCA.getContext();
MCStreamer &OS = getStreamer();
MCSectionELF *Sec = Context.getELFSection(
".MIPS.abiflags", ELF::SHT_MIPS_ABIFLAGS, ELF::SHF_ALLOC, 24, "");
MCA.registerSection(*Sec);
Sec->setAlignment(Align(8));
OS.SwitchSection(Sec);
OS << ABIFlagsSection;
}