#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+using namespace llvm::X86Disassembler;
+
+#define DEBUG_TYPE "x86-disassembler"
+
#define GET_REGINFO_ENUM
#include "X86GenRegisterInfo.inc"
#define GET_INSTRINFO_ENUM
#include "X86GenInstrInfo.inc"
+#define GET_SUBTARGETINFO_ENUM
+#include "X86GenSubtargetInfo.inc"
-using namespace llvm;
-using namespace llvm::X86Disassembler;
-
-void x86DisassemblerDebug(const char *file,
- unsigned line,
- const char *s) {
+void llvm::X86Disassembler::Debug(const char *file, unsigned line,
+ const char *s) {
dbgs() << file << ":" << line << ": " << s;
}
-const char *x86DisassemblerGetInstrName(unsigned Opcode, const void *mii) {
+const char *llvm::X86Disassembler::GetInstrName(unsigned Opcode,
+ const void *mii) {
const MCInstrInfo *MII = static_cast<const MCInstrInfo *>(mii);
return MII->getName(Opcode);
}
-#define debug(s) DEBUG(x86DisassemblerDebug(__FILE__, __LINE__, s));
+#define debug(s) DEBUG(Debug(__FILE__, __LINE__, s));
namespace llvm {
InternalInstruction &source,
const MCDisassembler *Dis);
-X86GenericDisassembler::X86GenericDisassembler(const MCSubtargetInfo &STI,
- DisassemblerMode mode,
- const MCInstrInfo *MII)
- : MCDisassembler(STI), MII(MII), fMode(mode) {}
-
-X86GenericDisassembler::~X86GenericDisassembler() {
- delete MII;
+X86GenericDisassembler::X86GenericDisassembler(
+ const MCSubtargetInfo &STI,
+ MCContext &Ctx,
+ std::unique_ptr<const MCInstrInfo> MII)
+ : MCDisassembler(STI, Ctx), MII(std::move(MII)) {
+ switch (STI.getFeatureBits() &
+ (X86::Mode16Bit | X86::Mode32Bit | X86::Mode64Bit)) {
+ case X86::Mode16Bit:
+ fMode = MODE_16BIT;
+ break;
+ case X86::Mode32Bit:
+ fMode = MODE_32BIT;
+ break;
+ case X86::Mode64Bit:
+ fMode = MODE_64BIT;
+ break;
+ default:
+ llvm_unreachable("Invalid CPU mode");
+ }
}
/// regionReader - a callback function that wraps the readByte method from
dlog_t loggerFn = logger;
if (&vStream == &nulls())
- loggerFn = 0; // Disable logging completely if it's going to nulls().
+ loggerFn = nullptr; // Disable logging completely if it's going to nulls().
int ret = decodeInstruction(&internalInstr,
regionReader,
(const void*)®ion,
loggerFn,
(void*)&vStream,
- (const void*)MII,
+ (const void*)MII.get(),
address,
fMode);
Dis->tryAddingPcLoadReferenceComment(Value, Address);
}
+static const uint8_t segmentRegnums[SEG_OVERRIDE_max] = {
+ 0, // SEG_OVERRIDE_NONE
+ X86::CS,
+ X86::SS,
+ X86::DS,
+ X86::ES,
+ X86::FS,
+ X86::GS
+};
+
+/// translateSrcIndex - Appends a source index operand to an MCInst.
+///
+/// @param mcInst - The MCInst to append to.
+/// @param insn - The internal instruction.
+static bool translateSrcIndex(MCInst &mcInst, InternalInstruction &insn) {
+ unsigned baseRegNo;
+
+ if (insn.mode == MODE_64BIT)
+ baseRegNo = insn.prefixPresent[0x67] ? X86::ESI : X86::RSI;
+ else if (insn.mode == MODE_32BIT)
+ baseRegNo = insn.prefixPresent[0x67] ? X86::SI : X86::ESI;
+ else {
+ assert(insn.mode == MODE_16BIT);
+ baseRegNo = insn.prefixPresent[0x67] ? X86::ESI : X86::SI;
+ }
+ MCOperand baseReg = MCOperand::CreateReg(baseRegNo);
+ mcInst.addOperand(baseReg);
+
+ MCOperand segmentReg;
+ segmentReg = MCOperand::CreateReg(segmentRegnums[insn.segmentOverride]);
+ mcInst.addOperand(segmentReg);
+ return false;
+}
+
+/// translateDstIndex - Appends a destination index operand to an MCInst.
+///
+/// @param mcInst - The MCInst to append to.
+/// @param insn - The internal instruction.
+
+static bool translateDstIndex(MCInst &mcInst, InternalInstruction &insn) {
+ unsigned baseRegNo;
+
+ if (insn.mode == MODE_64BIT)
+ baseRegNo = insn.prefixPresent[0x67] ? X86::EDI : X86::RDI;
+ else if (insn.mode == MODE_32BIT)
+ baseRegNo = insn.prefixPresent[0x67] ? X86::DI : X86::EDI;
+ else {
+ assert(insn.mode == MODE_16BIT);
+ baseRegNo = insn.prefixPresent[0x67] ? X86::EDI : X86::DI;
+ }
+ MCOperand baseReg = MCOperand::CreateReg(baseRegNo);
+ mcInst.addOperand(baseReg);
+ return false;
+}
+
/// translateImmediate - Appends an immediate operand to an MCInst.
///
/// @param mcInst - The MCInst to append to.
}
// By default sign-extend all X86 immediates based on their encoding.
else if (type == TYPE_IMM8 || type == TYPE_IMM16 || type == TYPE_IMM32 ||
- type == TYPE_IMM64) {
+ type == TYPE_IMM64 || type == TYPE_IMMv) {
uint32_t Opcode = mcInst.getOpcode();
switch (operand.encoding) {
default:
insn.immediateOffset, insn.immediateSize,
mcInst, Dis))
mcInst.addOperand(MCOperand::CreateImm(immediate));
+
+ if (type == TYPE_MOFFS8 || type == TYPE_MOFFS16 ||
+ type == TYPE_MOFFS32 || type == TYPE_MOFFS64) {
+ MCOperand segmentReg;
+ segmentReg = MCOperand::CreateReg(segmentRegnums[insn.segmentOverride]);
+ mcInst.addOperand(segmentReg);
+ }
}
/// translateRMRegister - Translates a register stored in the R/M field of the
}
displacement = MCOperand::CreateImm(insn.displacement);
-
- static const uint8_t segmentRegnums[SEG_OVERRIDE_max] = {
- 0, // SEG_OVERRIDE_NONE
- X86::CS,
- X86::SS,
- X86::DS,
- X86::ES,
- X86::FS,
- X86::GS
- };
-
+
segmentReg = MCOperand::CreateReg(segmentRegnums[insn.segmentOverride]);
mcInst.addOperand(baseReg);
///
/// @param mcInst - The MCInst to append to.
/// @param stackPos - The stack position to translate.
-/// @return - false on success; true otherwise.
-static bool translateFPRegister(MCInst &mcInst,
- uint8_t stackPos) {
- if (stackPos >= 8) {
- debug("Invalid FP stack position");
- return true;
- }
-
+static void translateFPRegister(MCInst &mcInst,
+ uint8_t stackPos) {
mcInst.addOperand(MCOperand::CreateReg(X86::ST0 + stackPos));
-
- return false;
}
/// translateMaskRegister - Translates a 3-bit mask register number to
insn,
Dis);
return false;
+ case ENCODING_SI:
+ return translateSrcIndex(mcInst, insn);
+ case ENCODING_DI:
+ return translateDstIndex(mcInst, insn);
case ENCODING_RB:
case ENCODING_RW:
case ENCODING_RD:
case ENCODING_RO:
- translateRegister(mcInst, insn.opcodeRegister);
- return false;
- case ENCODING_I:
- return translateFPRegister(mcInst, insn.opcodeModifier);
case ENCODING_Rv:
translateRegister(mcInst, insn.opcodeRegister);
return false;
+ case ENCODING_FP:
+ translateFPRegister(mcInst, insn.modRM & 7);
+ return false;
case ENCODING_VVVV:
translateRegister(mcInst, insn.vvvv);
return false;
return false;
}
-static MCDisassembler *createX86_32Disassembler(const Target &T,
- const MCSubtargetInfo &STI) {
- return new X86Disassembler::X86GenericDisassembler(STI, MODE_32BIT,
- T.createMCInstrInfo());
-}
-
-static MCDisassembler *createX86_64Disassembler(const Target &T,
- const MCSubtargetInfo &STI) {
- return new X86Disassembler::X86GenericDisassembler(STI, MODE_64BIT,
- T.createMCInstrInfo());
+static MCDisassembler *createX86Disassembler(const Target &T,
+ const MCSubtargetInfo &STI,
+ MCContext &Ctx) {
+ std::unique_ptr<const MCInstrInfo> MII(T.createMCInstrInfo());
+ return new X86Disassembler::X86GenericDisassembler(STI, Ctx, std::move(MII));
}
extern "C" void LLVMInitializeX86Disassembler() {
// Register the disassembler.
TargetRegistry::RegisterMCDisassembler(TheX86_32Target,
- createX86_32Disassembler);
+ createX86Disassembler);
TargetRegistry::RegisterMCDisassembler(TheX86_64Target,
- createX86_64Disassembler);
+ createX86Disassembler);
}
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