791 lines
32 KiB
C++
791 lines
32 KiB
C++
//===-- X86MCTargetDesc.cpp - X86 Target Descriptions ---------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides X86 specific target descriptions.
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//
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//===----------------------------------------------------------------------===//
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#include "X86MCTargetDesc.h"
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#include "TargetInfo/X86TargetInfo.h"
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#include "X86ATTInstPrinter.h"
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#include "X86BaseInfo.h"
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#include "X86IntelInstPrinter.h"
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#include "X86MCAsmInfo.h"
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#include "llvm/ADT/APInt.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/MC/MCDwarf.h"
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#include "llvm/MC/MCInstrAnalysis.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/MachineLocation.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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#define GET_REGINFO_MC_DESC
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#include "X86GenRegisterInfo.inc"
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#define GET_INSTRINFO_MC_DESC
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#define GET_INSTRINFO_MC_HELPERS
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#include "X86GenInstrInfo.inc"
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#define GET_SUBTARGETINFO_MC_DESC
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#include "X86GenSubtargetInfo.inc"
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std::string X86_MC::ParseX86Triple(const Triple &TT) {
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std::string FS;
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// SSE2 should default to enabled in 64-bit mode, but can be turned off
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// explicitly.
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if (TT.isArch64Bit())
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FS = "+64bit-mode,-32bit-mode,-16bit-mode,+sse2";
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else if (TT.getEnvironment() != Triple::CODE16)
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FS = "-64bit-mode,+32bit-mode,-16bit-mode";
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else
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FS = "-64bit-mode,-32bit-mode,+16bit-mode";
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return FS;
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}
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unsigned X86_MC::getDwarfRegFlavour(const Triple &TT, bool isEH) {
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if (TT.getArch() == Triple::x86_64)
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return DWARFFlavour::X86_64;
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if (TT.isOSDarwin())
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return isEH ? DWARFFlavour::X86_32_DarwinEH : DWARFFlavour::X86_32_Generic;
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if (TT.isOSCygMing())
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// Unsupported by now, just quick fallback
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return DWARFFlavour::X86_32_Generic;
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return DWARFFlavour::X86_32_Generic;
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}
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bool X86_MC::hasLockPrefix(const MCInst &MI) {
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return MI.getFlags() & X86::IP_HAS_LOCK;
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}
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void X86_MC::initLLVMToSEHAndCVRegMapping(MCRegisterInfo *MRI) {
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// FIXME: TableGen these.
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for (unsigned Reg = X86::NoRegister + 1; Reg < X86::NUM_TARGET_REGS; ++Reg) {
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unsigned SEH = MRI->getEncodingValue(Reg);
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MRI->mapLLVMRegToSEHReg(Reg, SEH);
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}
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// Mapping from CodeView to MC register id.
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static const struct {
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codeview::RegisterId CVReg;
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MCPhysReg Reg;
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} RegMap[] = {
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{codeview::RegisterId::AL, X86::AL},
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{codeview::RegisterId::CL, X86::CL},
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{codeview::RegisterId::DL, X86::DL},
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{codeview::RegisterId::BL, X86::BL},
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{codeview::RegisterId::AH, X86::AH},
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{codeview::RegisterId::CH, X86::CH},
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{codeview::RegisterId::DH, X86::DH},
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{codeview::RegisterId::BH, X86::BH},
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{codeview::RegisterId::AX, X86::AX},
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{codeview::RegisterId::CX, X86::CX},
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{codeview::RegisterId::DX, X86::DX},
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{codeview::RegisterId::BX, X86::BX},
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{codeview::RegisterId::SP, X86::SP},
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{codeview::RegisterId::BP, X86::BP},
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{codeview::RegisterId::SI, X86::SI},
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{codeview::RegisterId::DI, X86::DI},
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{codeview::RegisterId::EAX, X86::EAX},
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{codeview::RegisterId::ECX, X86::ECX},
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{codeview::RegisterId::EDX, X86::EDX},
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{codeview::RegisterId::EBX, X86::EBX},
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{codeview::RegisterId::ESP, X86::ESP},
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{codeview::RegisterId::EBP, X86::EBP},
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{codeview::RegisterId::ESI, X86::ESI},
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{codeview::RegisterId::EDI, X86::EDI},
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{codeview::RegisterId::EFLAGS, X86::EFLAGS},
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{codeview::RegisterId::ST0, X86::FP0},
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{codeview::RegisterId::ST1, X86::FP1},
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{codeview::RegisterId::ST2, X86::FP2},
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{codeview::RegisterId::ST3, X86::FP3},
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{codeview::RegisterId::ST4, X86::FP4},
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{codeview::RegisterId::ST5, X86::FP5},
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{codeview::RegisterId::ST6, X86::FP6},
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{codeview::RegisterId::ST7, X86::FP7},
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{codeview::RegisterId::MM0, X86::MM0},
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{codeview::RegisterId::MM1, X86::MM1},
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{codeview::RegisterId::MM2, X86::MM2},
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{codeview::RegisterId::MM3, X86::MM3},
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{codeview::RegisterId::MM4, X86::MM4},
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{codeview::RegisterId::MM5, X86::MM5},
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{codeview::RegisterId::MM6, X86::MM6},
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{codeview::RegisterId::MM7, X86::MM7},
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{codeview::RegisterId::XMM0, X86::XMM0},
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{codeview::RegisterId::XMM1, X86::XMM1},
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{codeview::RegisterId::XMM2, X86::XMM2},
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{codeview::RegisterId::XMM3, X86::XMM3},
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{codeview::RegisterId::XMM4, X86::XMM4},
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{codeview::RegisterId::XMM5, X86::XMM5},
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{codeview::RegisterId::XMM6, X86::XMM6},
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{codeview::RegisterId::XMM7, X86::XMM7},
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{codeview::RegisterId::XMM8, X86::XMM8},
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{codeview::RegisterId::XMM9, X86::XMM9},
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{codeview::RegisterId::XMM10, X86::XMM10},
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{codeview::RegisterId::XMM11, X86::XMM11},
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{codeview::RegisterId::XMM12, X86::XMM12},
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{codeview::RegisterId::XMM13, X86::XMM13},
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{codeview::RegisterId::XMM14, X86::XMM14},
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{codeview::RegisterId::XMM15, X86::XMM15},
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{codeview::RegisterId::SIL, X86::SIL},
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{codeview::RegisterId::DIL, X86::DIL},
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{codeview::RegisterId::BPL, X86::BPL},
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{codeview::RegisterId::SPL, X86::SPL},
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{codeview::RegisterId::RAX, X86::RAX},
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{codeview::RegisterId::RBX, X86::RBX},
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{codeview::RegisterId::RCX, X86::RCX},
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{codeview::RegisterId::RDX, X86::RDX},
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{codeview::RegisterId::RSI, X86::RSI},
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{codeview::RegisterId::RDI, X86::RDI},
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{codeview::RegisterId::RBP, X86::RBP},
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{codeview::RegisterId::RSP, X86::RSP},
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{codeview::RegisterId::R8, X86::R8},
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{codeview::RegisterId::R9, X86::R9},
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{codeview::RegisterId::R10, X86::R10},
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{codeview::RegisterId::R11, X86::R11},
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{codeview::RegisterId::R12, X86::R12},
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{codeview::RegisterId::R13, X86::R13},
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{codeview::RegisterId::R14, X86::R14},
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{codeview::RegisterId::R15, X86::R15},
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{codeview::RegisterId::R8B, X86::R8B},
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{codeview::RegisterId::R9B, X86::R9B},
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{codeview::RegisterId::R10B, X86::R10B},
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{codeview::RegisterId::R11B, X86::R11B},
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{codeview::RegisterId::R12B, X86::R12B},
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{codeview::RegisterId::R13B, X86::R13B},
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{codeview::RegisterId::R14B, X86::R14B},
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{codeview::RegisterId::R15B, X86::R15B},
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{codeview::RegisterId::R8W, X86::R8W},
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{codeview::RegisterId::R9W, X86::R9W},
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{codeview::RegisterId::R10W, X86::R10W},
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{codeview::RegisterId::R11W, X86::R11W},
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{codeview::RegisterId::R12W, X86::R12W},
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{codeview::RegisterId::R13W, X86::R13W},
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{codeview::RegisterId::R14W, X86::R14W},
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{codeview::RegisterId::R15W, X86::R15W},
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{codeview::RegisterId::R8D, X86::R8D},
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{codeview::RegisterId::R9D, X86::R9D},
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{codeview::RegisterId::R10D, X86::R10D},
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{codeview::RegisterId::R11D, X86::R11D},
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{codeview::RegisterId::R12D, X86::R12D},
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{codeview::RegisterId::R13D, X86::R13D},
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{codeview::RegisterId::R14D, X86::R14D},
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{codeview::RegisterId::R15D, X86::R15D},
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{codeview::RegisterId::AMD64_YMM0, X86::YMM0},
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{codeview::RegisterId::AMD64_YMM1, X86::YMM1},
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{codeview::RegisterId::AMD64_YMM2, X86::YMM2},
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{codeview::RegisterId::AMD64_YMM3, X86::YMM3},
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{codeview::RegisterId::AMD64_YMM4, X86::YMM4},
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{codeview::RegisterId::AMD64_YMM5, X86::YMM5},
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{codeview::RegisterId::AMD64_YMM6, X86::YMM6},
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{codeview::RegisterId::AMD64_YMM7, X86::YMM7},
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{codeview::RegisterId::AMD64_YMM8, X86::YMM8},
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{codeview::RegisterId::AMD64_YMM9, X86::YMM9},
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{codeview::RegisterId::AMD64_YMM10, X86::YMM10},
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{codeview::RegisterId::AMD64_YMM11, X86::YMM11},
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{codeview::RegisterId::AMD64_YMM12, X86::YMM12},
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{codeview::RegisterId::AMD64_YMM13, X86::YMM13},
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{codeview::RegisterId::AMD64_YMM14, X86::YMM14},
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{codeview::RegisterId::AMD64_YMM15, X86::YMM15},
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{codeview::RegisterId::AMD64_YMM16, X86::YMM16},
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{codeview::RegisterId::AMD64_YMM17, X86::YMM17},
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{codeview::RegisterId::AMD64_YMM18, X86::YMM18},
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{codeview::RegisterId::AMD64_YMM19, X86::YMM19},
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{codeview::RegisterId::AMD64_YMM20, X86::YMM20},
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{codeview::RegisterId::AMD64_YMM21, X86::YMM21},
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{codeview::RegisterId::AMD64_YMM22, X86::YMM22},
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{codeview::RegisterId::AMD64_YMM23, X86::YMM23},
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{codeview::RegisterId::AMD64_YMM24, X86::YMM24},
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{codeview::RegisterId::AMD64_YMM25, X86::YMM25},
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{codeview::RegisterId::AMD64_YMM26, X86::YMM26},
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{codeview::RegisterId::AMD64_YMM27, X86::YMM27},
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{codeview::RegisterId::AMD64_YMM28, X86::YMM28},
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{codeview::RegisterId::AMD64_YMM29, X86::YMM29},
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{codeview::RegisterId::AMD64_YMM30, X86::YMM30},
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{codeview::RegisterId::AMD64_YMM31, X86::YMM31},
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{codeview::RegisterId::AMD64_ZMM0, X86::ZMM0},
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{codeview::RegisterId::AMD64_ZMM1, X86::ZMM1},
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{codeview::RegisterId::AMD64_ZMM2, X86::ZMM2},
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{codeview::RegisterId::AMD64_ZMM3, X86::ZMM3},
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{codeview::RegisterId::AMD64_ZMM4, X86::ZMM4},
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{codeview::RegisterId::AMD64_ZMM5, X86::ZMM5},
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{codeview::RegisterId::AMD64_ZMM6, X86::ZMM6},
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{codeview::RegisterId::AMD64_ZMM7, X86::ZMM7},
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{codeview::RegisterId::AMD64_ZMM8, X86::ZMM8},
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{codeview::RegisterId::AMD64_ZMM9, X86::ZMM9},
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{codeview::RegisterId::AMD64_ZMM10, X86::ZMM10},
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{codeview::RegisterId::AMD64_ZMM11, X86::ZMM11},
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{codeview::RegisterId::AMD64_ZMM12, X86::ZMM12},
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{codeview::RegisterId::AMD64_ZMM13, X86::ZMM13},
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{codeview::RegisterId::AMD64_ZMM14, X86::ZMM14},
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{codeview::RegisterId::AMD64_ZMM15, X86::ZMM15},
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{codeview::RegisterId::AMD64_ZMM16, X86::ZMM16},
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{codeview::RegisterId::AMD64_ZMM17, X86::ZMM17},
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{codeview::RegisterId::AMD64_ZMM18, X86::ZMM18},
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{codeview::RegisterId::AMD64_ZMM19, X86::ZMM19},
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{codeview::RegisterId::AMD64_ZMM20, X86::ZMM20},
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{codeview::RegisterId::AMD64_ZMM21, X86::ZMM21},
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{codeview::RegisterId::AMD64_ZMM22, X86::ZMM22},
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{codeview::RegisterId::AMD64_ZMM23, X86::ZMM23},
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{codeview::RegisterId::AMD64_ZMM24, X86::ZMM24},
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{codeview::RegisterId::AMD64_ZMM25, X86::ZMM25},
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{codeview::RegisterId::AMD64_ZMM26, X86::ZMM26},
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{codeview::RegisterId::AMD64_ZMM27, X86::ZMM27},
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{codeview::RegisterId::AMD64_ZMM28, X86::ZMM28},
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{codeview::RegisterId::AMD64_ZMM29, X86::ZMM29},
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{codeview::RegisterId::AMD64_ZMM30, X86::ZMM30},
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{codeview::RegisterId::AMD64_ZMM31, X86::ZMM31},
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{codeview::RegisterId::AMD64_K0, X86::K0},
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{codeview::RegisterId::AMD64_K1, X86::K1},
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{codeview::RegisterId::AMD64_K2, X86::K2},
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{codeview::RegisterId::AMD64_K3, X86::K3},
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{codeview::RegisterId::AMD64_K4, X86::K4},
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{codeview::RegisterId::AMD64_K5, X86::K5},
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{codeview::RegisterId::AMD64_K6, X86::K6},
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{codeview::RegisterId::AMD64_K7, X86::K7},
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{codeview::RegisterId::AMD64_XMM16, X86::XMM16},
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{codeview::RegisterId::AMD64_XMM17, X86::XMM17},
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{codeview::RegisterId::AMD64_XMM18, X86::XMM18},
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{codeview::RegisterId::AMD64_XMM19, X86::XMM19},
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{codeview::RegisterId::AMD64_XMM20, X86::XMM20},
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{codeview::RegisterId::AMD64_XMM21, X86::XMM21},
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{codeview::RegisterId::AMD64_XMM22, X86::XMM22},
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{codeview::RegisterId::AMD64_XMM23, X86::XMM23},
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{codeview::RegisterId::AMD64_XMM24, X86::XMM24},
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{codeview::RegisterId::AMD64_XMM25, X86::XMM25},
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{codeview::RegisterId::AMD64_XMM26, X86::XMM26},
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{codeview::RegisterId::AMD64_XMM27, X86::XMM27},
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{codeview::RegisterId::AMD64_XMM28, X86::XMM28},
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{codeview::RegisterId::AMD64_XMM29, X86::XMM29},
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{codeview::RegisterId::AMD64_XMM30, X86::XMM30},
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{codeview::RegisterId::AMD64_XMM31, X86::XMM31},
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};
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for (unsigned I = 0; I < array_lengthof(RegMap); ++I)
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MRI->mapLLVMRegToCVReg(RegMap[I].Reg, static_cast<int>(RegMap[I].CVReg));
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}
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MCSubtargetInfo *X86_MC::createX86MCSubtargetInfo(const Triple &TT,
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StringRef CPU, StringRef FS) {
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std::string ArchFS = X86_MC::ParseX86Triple(TT);
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assert(!ArchFS.empty() && "Failed to parse X86 triple");
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if (!FS.empty())
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ArchFS = (Twine(ArchFS) + "," + FS).str();
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if (CPU.empty())
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CPU = "generic";
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return createX86MCSubtargetInfoImpl(TT, CPU, /*TuneCPU*/ CPU, ArchFS);
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}
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static MCInstrInfo *createX86MCInstrInfo() {
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MCInstrInfo *X = new MCInstrInfo();
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InitX86MCInstrInfo(X);
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return X;
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}
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static MCRegisterInfo *createX86MCRegisterInfo(const Triple &TT) {
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unsigned RA = (TT.getArch() == Triple::x86_64)
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? X86::RIP // Should have dwarf #16.
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: X86::EIP; // Should have dwarf #8.
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MCRegisterInfo *X = new MCRegisterInfo();
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InitX86MCRegisterInfo(X, RA, X86_MC::getDwarfRegFlavour(TT, false),
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X86_MC::getDwarfRegFlavour(TT, true), RA);
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X86_MC::initLLVMToSEHAndCVRegMapping(X);
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return X;
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}
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static MCAsmInfo *createX86MCAsmInfo(const MCRegisterInfo &MRI,
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const Triple &TheTriple,
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const MCTargetOptions &Options) {
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bool is64Bit = TheTriple.getArch() == Triple::x86_64;
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MCAsmInfo *MAI;
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if (TheTriple.isOSBinFormatMachO()) {
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if (is64Bit)
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MAI = new X86_64MCAsmInfoDarwin(TheTriple);
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else
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MAI = new X86MCAsmInfoDarwin(TheTriple);
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} else if (TheTriple.isOSBinFormatELF()) {
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// Force the use of an ELF container.
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MAI = new X86ELFMCAsmInfo(TheTriple);
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} else if (TheTriple.isWindowsMSVCEnvironment() ||
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TheTriple.isWindowsCoreCLREnvironment()) {
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if (Options.getAssemblyLanguage().equals_lower("masm"))
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MAI = new X86MCAsmInfoMicrosoftMASM(TheTriple);
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else
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MAI = new X86MCAsmInfoMicrosoft(TheTriple);
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} else if (TheTriple.isOSCygMing() ||
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TheTriple.isWindowsItaniumEnvironment()) {
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MAI = new X86MCAsmInfoGNUCOFF(TheTriple);
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} else {
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// The default is ELF.
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MAI = new X86ELFMCAsmInfo(TheTriple);
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}
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// Initialize initial frame state.
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// Calculate amount of bytes used for return address storing
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int stackGrowth = is64Bit ? -8 : -4;
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// Initial state of the frame pointer is esp+stackGrowth.
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unsigned StackPtr = is64Bit ? X86::RSP : X86::ESP;
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MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(
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nullptr, MRI.getDwarfRegNum(StackPtr, true), -stackGrowth);
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MAI->addInitialFrameState(Inst);
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// Add return address to move list
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unsigned InstPtr = is64Bit ? X86::RIP : X86::EIP;
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MCCFIInstruction Inst2 = MCCFIInstruction::createOffset(
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nullptr, MRI.getDwarfRegNum(InstPtr, true), stackGrowth);
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MAI->addInitialFrameState(Inst2);
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return MAI;
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}
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static MCInstPrinter *createX86MCInstPrinter(const Triple &T,
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unsigned SyntaxVariant,
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const MCAsmInfo &MAI,
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const MCInstrInfo &MII,
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|
const MCRegisterInfo &MRI) {
|
|
if (SyntaxVariant == 0)
|
|
return new X86ATTInstPrinter(MAI, MII, MRI);
|
|
if (SyntaxVariant == 1)
|
|
return new X86IntelInstPrinter(MAI, MII, MRI);
|
|
return nullptr;
|
|
}
|
|
|
|
static MCRelocationInfo *createX86MCRelocationInfo(const Triple &TheTriple,
|
|
MCContext &Ctx) {
|
|
// Default to the stock relocation info.
|
|
return llvm::createMCRelocationInfo(TheTriple, Ctx);
|
|
}
|
|
|
|
namespace llvm {
|
|
namespace X86_MC {
|
|
|
|
class X86MCInstrAnalysis : public MCInstrAnalysis {
|
|
X86MCInstrAnalysis(const X86MCInstrAnalysis &) = delete;
|
|
X86MCInstrAnalysis &operator=(const X86MCInstrAnalysis &) = delete;
|
|
virtual ~X86MCInstrAnalysis() = default;
|
|
|
|
public:
|
|
X86MCInstrAnalysis(const MCInstrInfo *MCII) : MCInstrAnalysis(MCII) {}
|
|
|
|
#define GET_STIPREDICATE_DECLS_FOR_MC_ANALYSIS
|
|
#include "X86GenSubtargetInfo.inc"
|
|
|
|
bool clearsSuperRegisters(const MCRegisterInfo &MRI, const MCInst &Inst,
|
|
APInt &Mask) const override;
|
|
std::vector<std::pair<uint64_t, uint64_t>>
|
|
findPltEntries(uint64_t PltSectionVA, ArrayRef<uint8_t> PltContents,
|
|
uint64_t GotSectionVA,
|
|
const Triple &TargetTriple) const override;
|
|
|
|
bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
|
|
uint64_t &Target) const override;
|
|
Optional<uint64_t> evaluateMemoryOperandAddress(const MCInst &Inst,
|
|
uint64_t Addr,
|
|
uint64_t Size) const override;
|
|
};
|
|
|
|
#define GET_STIPREDICATE_DEFS_FOR_MC_ANALYSIS
|
|
#include "X86GenSubtargetInfo.inc"
|
|
|
|
bool X86MCInstrAnalysis::clearsSuperRegisters(const MCRegisterInfo &MRI,
|
|
const MCInst &Inst,
|
|
APInt &Mask) const {
|
|
const MCInstrDesc &Desc = Info->get(Inst.getOpcode());
|
|
unsigned NumDefs = Desc.getNumDefs();
|
|
unsigned NumImplicitDefs = Desc.getNumImplicitDefs();
|
|
assert(Mask.getBitWidth() == NumDefs + NumImplicitDefs &&
|
|
"Unexpected number of bits in the mask!");
|
|
|
|
bool HasVEX = (Desc.TSFlags & X86II::EncodingMask) == X86II::VEX;
|
|
bool HasEVEX = (Desc.TSFlags & X86II::EncodingMask) == X86II::EVEX;
|
|
bool HasXOP = (Desc.TSFlags & X86II::EncodingMask) == X86II::XOP;
|
|
|
|
const MCRegisterClass &GR32RC = MRI.getRegClass(X86::GR32RegClassID);
|
|
const MCRegisterClass &VR128XRC = MRI.getRegClass(X86::VR128XRegClassID);
|
|
const MCRegisterClass &VR256XRC = MRI.getRegClass(X86::VR256XRegClassID);
|
|
|
|
auto ClearsSuperReg = [=](unsigned RegID) {
|
|
// On X86-64, a general purpose integer register is viewed as a 64-bit
|
|
// register internal to the processor.
|
|
// An update to the lower 32 bits of a 64 bit integer register is
|
|
// architecturally defined to zero extend the upper 32 bits.
|
|
if (GR32RC.contains(RegID))
|
|
return true;
|
|
|
|
// Early exit if this instruction has no vex/evex/xop prefix.
|
|
if (!HasEVEX && !HasVEX && !HasXOP)
|
|
return false;
|
|
|
|
// All VEX and EVEX encoded instructions are defined to zero the high bits
|
|
// of the destination register up to VLMAX (i.e. the maximum vector register
|
|
// width pertaining to the instruction).
|
|
// We assume the same behavior for XOP instructions too.
|
|
return VR128XRC.contains(RegID) || VR256XRC.contains(RegID);
|
|
};
|
|
|
|
Mask.clearAllBits();
|
|
for (unsigned I = 0, E = NumDefs; I < E; ++I) {
|
|
const MCOperand &Op = Inst.getOperand(I);
|
|
if (ClearsSuperReg(Op.getReg()))
|
|
Mask.setBit(I);
|
|
}
|
|
|
|
for (unsigned I = 0, E = NumImplicitDefs; I < E; ++I) {
|
|
const MCPhysReg Reg = Desc.getImplicitDefs()[I];
|
|
if (ClearsSuperReg(Reg))
|
|
Mask.setBit(NumDefs + I);
|
|
}
|
|
|
|
return Mask.getBoolValue();
|
|
}
|
|
|
|
static std::vector<std::pair<uint64_t, uint64_t>>
|
|
findX86PltEntries(uint64_t PltSectionVA, ArrayRef<uint8_t> PltContents,
|
|
uint64_t GotPltSectionVA) {
|
|
// Do a lightweight parsing of PLT entries.
|
|
std::vector<std::pair<uint64_t, uint64_t>> Result;
|
|
for (uint64_t Byte = 0, End = PltContents.size(); Byte + 6 < End; ) {
|
|
// Recognize a jmp.
|
|
if (PltContents[Byte] == 0xff && PltContents[Byte + 1] == 0xa3) {
|
|
// The jmp instruction at the beginning of each PLT entry jumps to the
|
|
// address of the base of the .got.plt section plus the immediate.
|
|
uint32_t Imm = support::endian::read32le(PltContents.data() + Byte + 2);
|
|
Result.push_back(
|
|
std::make_pair(PltSectionVA + Byte, GotPltSectionVA + Imm));
|
|
Byte += 6;
|
|
} else if (PltContents[Byte] == 0xff && PltContents[Byte + 1] == 0x25) {
|
|
// The jmp instruction at the beginning of each PLT entry jumps to the
|
|
// immediate.
|
|
uint32_t Imm = support::endian::read32le(PltContents.data() + Byte + 2);
|
|
Result.push_back(std::make_pair(PltSectionVA + Byte, Imm));
|
|
Byte += 6;
|
|
} else
|
|
Byte++;
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
static std::vector<std::pair<uint64_t, uint64_t>>
|
|
findX86_64PltEntries(uint64_t PltSectionVA, ArrayRef<uint8_t> PltContents) {
|
|
// Do a lightweight parsing of PLT entries.
|
|
std::vector<std::pair<uint64_t, uint64_t>> Result;
|
|
for (uint64_t Byte = 0, End = PltContents.size(); Byte + 6 < End; ) {
|
|
// Recognize a jmp.
|
|
if (PltContents[Byte] == 0xff && PltContents[Byte + 1] == 0x25) {
|
|
// The jmp instruction at the beginning of each PLT entry jumps to the
|
|
// address of the next instruction plus the immediate.
|
|
uint32_t Imm = support::endian::read32le(PltContents.data() + Byte + 2);
|
|
Result.push_back(
|
|
std::make_pair(PltSectionVA + Byte, PltSectionVA + Byte + 6 + Imm));
|
|
Byte += 6;
|
|
} else
|
|
Byte++;
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
std::vector<std::pair<uint64_t, uint64_t>> X86MCInstrAnalysis::findPltEntries(
|
|
uint64_t PltSectionVA, ArrayRef<uint8_t> PltContents,
|
|
uint64_t GotPltSectionVA, const Triple &TargetTriple) const {
|
|
switch (TargetTriple.getArch()) {
|
|
case Triple::x86:
|
|
return findX86PltEntries(PltSectionVA, PltContents, GotPltSectionVA);
|
|
case Triple::x86_64:
|
|
return findX86_64PltEntries(PltSectionVA, PltContents);
|
|
default:
|
|
return {};
|
|
}
|
|
}
|
|
|
|
bool X86MCInstrAnalysis::evaluateBranch(const MCInst &Inst, uint64_t Addr,
|
|
uint64_t Size, uint64_t &Target) const {
|
|
if (Inst.getNumOperands() == 0 ||
|
|
Info->get(Inst.getOpcode()).OpInfo[0].OperandType != MCOI::OPERAND_PCREL)
|
|
return false;
|
|
Target = Addr + Size + Inst.getOperand(0).getImm();
|
|
return true;
|
|
}
|
|
|
|
Optional<uint64_t> X86MCInstrAnalysis::evaluateMemoryOperandAddress(
|
|
const MCInst &Inst, uint64_t Addr, uint64_t Size) const {
|
|
const MCInstrDesc &MCID = Info->get(Inst.getOpcode());
|
|
int MemOpStart = X86II::getMemoryOperandNo(MCID.TSFlags);
|
|
if (MemOpStart == -1)
|
|
return None;
|
|
MemOpStart += X86II::getOperandBias(MCID);
|
|
|
|
const MCOperand &SegReg = Inst.getOperand(MemOpStart + X86::AddrSegmentReg);
|
|
const MCOperand &BaseReg = Inst.getOperand(MemOpStart + X86::AddrBaseReg);
|
|
const MCOperand &IndexReg = Inst.getOperand(MemOpStart + X86::AddrIndexReg);
|
|
const MCOperand &ScaleAmt = Inst.getOperand(MemOpStart + X86::AddrScaleAmt);
|
|
const MCOperand &Disp = Inst.getOperand(MemOpStart + X86::AddrDisp);
|
|
if (SegReg.getReg() != 0 || IndexReg.getReg() != 0 || ScaleAmt.getImm() != 1 ||
|
|
!Disp.isImm())
|
|
return None;
|
|
|
|
// RIP-relative addressing.
|
|
if (BaseReg.getReg() == X86::RIP)
|
|
return Addr + Size + Disp.getImm();
|
|
|
|
return None;
|
|
}
|
|
|
|
} // end of namespace X86_MC
|
|
|
|
} // end of namespace llvm
|
|
|
|
static MCInstrAnalysis *createX86MCInstrAnalysis(const MCInstrInfo *Info) {
|
|
return new X86_MC::X86MCInstrAnalysis(Info);
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeX86TargetMC() {
|
|
for (Target *T : {&getTheX86_32Target(), &getTheX86_64Target()}) {
|
|
// Register the MC asm info.
|
|
RegisterMCAsmInfoFn X(*T, createX86MCAsmInfo);
|
|
|
|
// Register the MC instruction info.
|
|
TargetRegistry::RegisterMCInstrInfo(*T, createX86MCInstrInfo);
|
|
|
|
// Register the MC register info.
|
|
TargetRegistry::RegisterMCRegInfo(*T, createX86MCRegisterInfo);
|
|
|
|
// Register the MC subtarget info.
|
|
TargetRegistry::RegisterMCSubtargetInfo(*T,
|
|
X86_MC::createX86MCSubtargetInfo);
|
|
|
|
// Register the MC instruction analyzer.
|
|
TargetRegistry::RegisterMCInstrAnalysis(*T, createX86MCInstrAnalysis);
|
|
|
|
// Register the code emitter.
|
|
TargetRegistry::RegisterMCCodeEmitter(*T, createX86MCCodeEmitter);
|
|
|
|
// Register the obj target streamer.
|
|
TargetRegistry::RegisterObjectTargetStreamer(*T,
|
|
createX86ObjectTargetStreamer);
|
|
|
|
// Register the asm target streamer.
|
|
TargetRegistry::RegisterAsmTargetStreamer(*T, createX86AsmTargetStreamer);
|
|
|
|
TargetRegistry::RegisterCOFFStreamer(*T, createX86WinCOFFStreamer);
|
|
|
|
// Register the MCInstPrinter.
|
|
TargetRegistry::RegisterMCInstPrinter(*T, createX86MCInstPrinter);
|
|
|
|
// Register the MC relocation info.
|
|
TargetRegistry::RegisterMCRelocationInfo(*T, createX86MCRelocationInfo);
|
|
}
|
|
|
|
// Register the asm backend.
|
|
TargetRegistry::RegisterMCAsmBackend(getTheX86_32Target(),
|
|
createX86_32AsmBackend);
|
|
TargetRegistry::RegisterMCAsmBackend(getTheX86_64Target(),
|
|
createX86_64AsmBackend);
|
|
}
|
|
|
|
MCRegister llvm::getX86SubSuperRegisterOrZero(MCRegister Reg, unsigned Size,
|
|
bool High) {
|
|
switch (Size) {
|
|
default: return X86::NoRegister;
|
|
case 8:
|
|
if (High) {
|
|
switch (Reg.id()) {
|
|
default: return getX86SubSuperRegisterOrZero(Reg, 64);
|
|
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
|
|
return X86::SI;
|
|
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
|
|
return X86::DI;
|
|
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
|
|
return X86::BP;
|
|
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
|
|
return X86::SP;
|
|
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
|
|
return X86::AH;
|
|
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
|
|
return X86::DH;
|
|
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
|
|
return X86::CH;
|
|
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
|
|
return X86::BH;
|
|
}
|
|
} else {
|
|
switch (Reg.id()) {
|
|
default: return X86::NoRegister;
|
|
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
|
|
return X86::AL;
|
|
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
|
|
return X86::DL;
|
|
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
|
|
return X86::CL;
|
|
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
|
|
return X86::BL;
|
|
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
|
|
return X86::SIL;
|
|
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
|
|
return X86::DIL;
|
|
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
|
|
return X86::BPL;
|
|
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
|
|
return X86::SPL;
|
|
case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
|
|
return X86::R8B;
|
|
case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
|
|
return X86::R9B;
|
|
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
|
|
return X86::R10B;
|
|
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
|
|
return X86::R11B;
|
|
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
|
|
return X86::R12B;
|
|
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
|
|
return X86::R13B;
|
|
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
|
|
return X86::R14B;
|
|
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
|
|
return X86::R15B;
|
|
}
|
|
}
|
|
case 16:
|
|
switch (Reg.id()) {
|
|
default: return X86::NoRegister;
|
|
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
|
|
return X86::AX;
|
|
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
|
|
return X86::DX;
|
|
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
|
|
return X86::CX;
|
|
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
|
|
return X86::BX;
|
|
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
|
|
return X86::SI;
|
|
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
|
|
return X86::DI;
|
|
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
|
|
return X86::BP;
|
|
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
|
|
return X86::SP;
|
|
case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
|
|
return X86::R8W;
|
|
case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
|
|
return X86::R9W;
|
|
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
|
|
return X86::R10W;
|
|
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
|
|
return X86::R11W;
|
|
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
|
|
return X86::R12W;
|
|
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
|
|
return X86::R13W;
|
|
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
|
|
return X86::R14W;
|
|
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
|
|
return X86::R15W;
|
|
}
|
|
case 32:
|
|
switch (Reg.id()) {
|
|
default: return X86::NoRegister;
|
|
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
|
|
return X86::EAX;
|
|
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
|
|
return X86::EDX;
|
|
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
|
|
return X86::ECX;
|
|
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
|
|
return X86::EBX;
|
|
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
|
|
return X86::ESI;
|
|
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
|
|
return X86::EDI;
|
|
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
|
|
return X86::EBP;
|
|
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
|
|
return X86::ESP;
|
|
case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
|
|
return X86::R8D;
|
|
case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
|
|
return X86::R9D;
|
|
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
|
|
return X86::R10D;
|
|
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
|
|
return X86::R11D;
|
|
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
|
|
return X86::R12D;
|
|
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
|
|
return X86::R13D;
|
|
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
|
|
return X86::R14D;
|
|
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
|
|
return X86::R15D;
|
|
}
|
|
case 64:
|
|
switch (Reg.id()) {
|
|
default: return 0;
|
|
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
|
|
return X86::RAX;
|
|
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
|
|
return X86::RDX;
|
|
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
|
|
return X86::RCX;
|
|
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
|
|
return X86::RBX;
|
|
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
|
|
return X86::RSI;
|
|
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
|
|
return X86::RDI;
|
|
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
|
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return X86::RBP;
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case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
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return X86::RSP;
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case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
|
|
return X86::R8;
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case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
|
|
return X86::R9;
|
|
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
|
|
return X86::R10;
|
|
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
|
|
return X86::R11;
|
|
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
|
|
return X86::R12;
|
|
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
|
|
return X86::R13;
|
|
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
|
|
return X86::R14;
|
|
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
|
|
return X86::R15;
|
|
}
|
|
}
|
|
}
|
|
|
|
MCRegister llvm::getX86SubSuperRegister(MCRegister Reg, unsigned Size, bool High) {
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|
MCRegister Res = getX86SubSuperRegisterOrZero(Reg, Size, High);
|
|
assert(Res != X86::NoRegister && "Unexpected register or VT");
|
|
return Res;
|
|
}
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|
|
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