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b80d571ea8
llvm-6502/lib/Target/X86/Disassembler/X86Disassembler.cpp
Kevin Enderby b80d571ea8 Updated the llvm-mc disassembler C API to support for the X86 target. 
rdar://10873652

As part of this I updated the llvm-mc disassembler C API to always call the
SymbolLookUp call back even if there is no getOpInfo call back.  If there is a
getOpInfo call back that is tried first and then if that gets no information
then the  SymbolLookUp is called.  I also made the code more robust by
memset(3)'ing to zero the LLVMOpInfo1 struct before then setting
SymbolicOp.Value before for the call to getOpInfo.  And also don't use any
values from the  LLVMOpInfo1 struct if getOpInfo returns 0.  And also don't
use any of the ReferenceType or ReferenceName values from SymbolLookUp if it
returns NULL. rdar://10873563 and rdar://10873683

For the X86 target also fixed bugs so the annotations get printed. 

Also fixed a few places in the ARM target that was not producing symbolic
operands for some instructions.  rdar://10878166


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151267 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-23 18:18:17 +00:00

761 lines
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//===-- X86Disassembler.cpp - Disassembler for x86 and x86_64 -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is part of the X86 Disassembler.
// It contains code to translate the data produced by the decoder into
// MCInsts.
// Documentation for the disassembler can be found in X86Disassembler.h.
//
//===----------------------------------------------------------------------===//
#include "X86Disassembler.h"
#include "X86DisassemblerDecoder.h"
#include "llvm/MC/EDInstInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MemoryObject.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
#define GET_REGINFO_ENUM
#include "X86GenRegisterInfo.inc"
#define GET_INSTRINFO_ENUM
#include "X86GenInstrInfo.inc"
#include "X86GenEDInfo.inc"
using namespace llvm;
using namespace llvm::X86Disassembler;
void x86DisassemblerDebug(const char *file,
unsigned line,
const char *s) {
dbgs() << file << ":" << line << ": " << s;
}
const char *x86DisassemblerGetInstrName(unsigned Opcode, void *mii) {
const MCInstrInfo *MII = static_cast<const MCInstrInfo *>(mii);
return MII->getName(Opcode);
}
#define debug(s) DEBUG(x86DisassemblerDebug(__FILE__, __LINE__, s));
namespace llvm {
// Fill-ins to make the compiler happy. These constants are never actually
// assigned; they are just filler to make an automatically-generated switch
// statement work.
namespace X86 {
enum {
BX_SI = 500,
BX_DI = 501,
BP_SI = 502,
BP_DI = 503,
sib = 504,
sib64 = 505
};
}
extern Target TheX86_32Target, TheX86_64Target;
}
static bool translateInstruction(MCInst &target,
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;
}
const EDInstInfo *X86GenericDisassembler::getEDInfo() const {
return instInfoX86;
}
/// regionReader - a callback function that wraps the readByte method from
/// MemoryObject.
///
/// @param arg - The generic callback parameter. In this case, this should
/// be a pointer to a MemoryObject.
/// @param byte - A pointer to the byte to be read.
/// @param address - The address to be read.
static int regionReader(void* arg, uint8_t* byte, uint64_t address) {
MemoryObject* region = static_cast<MemoryObject*>(arg);
return region->readByte(address, byte);
}
/// logger - a callback function that wraps the operator<< method from
/// raw_ostream.
///
/// @param arg - The generic callback parameter. This should be a pointe
/// to a raw_ostream.
/// @param log - A string to be logged. logger() adds a newline.
static void logger(void* arg, const char* log) {
if (!arg)
return;
raw_ostream &vStream = *(static_cast<raw_ostream*>(arg));
vStream << log << "\n";
}
//
// Public interface for the disassembler
//
MCDisassembler::DecodeStatus
X86GenericDisassembler::getInstruction(MCInst &instr,
uint64_t &size,
MemoryObject &region,
uint64_t address,
raw_ostream &vStream,
raw_ostream &cStream) const {
CommentStream = &cStream;
InternalInstruction internalInstr;
dlog_t loggerFn = logger;
if (&vStream == &nulls())
loggerFn = 0; // Disable logging completely if it's going to nulls().
int ret = decodeInstruction(&internalInstr,
regionReader,
(void*)&region,
loggerFn,
(void*)&vStream,
(void*)MII,
address,
fMode);
if (ret) {
size = internalInstr.readerCursor - address;
return Fail;
}
else {
size = internalInstr.length;
return (!translateInstruction(instr, internalInstr, this)) ?
Success : Fail;
}
}
//
// Private code that translates from struct InternalInstructions to MCInsts.
//
/// translateRegister - Translates an internal register to the appropriate LLVM
/// register, and appends it as an operand to an MCInst.
///
/// @param mcInst - The MCInst to append to.
/// @param reg - The Reg to append.
static void translateRegister(MCInst &mcInst, Reg reg) {
#define ENTRY(x) X86::x,
uint8_t llvmRegnums[] = {
ALL_REGS
0
};
#undef ENTRY
uint8_t llvmRegnum = llvmRegnums[reg];
mcInst.addOperand(MCOperand::CreateReg(llvmRegnum));
}
/// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
/// immediate Value in the MCInst.
///
/// @param Value - The immediate Value, has had any PC adjustment made by
/// the caller.
/// @param isBranch - If the instruction is a branch instruction
/// @param Address - The starting address of the instruction
/// @param Offset - The byte offset to this immediate in the instruction
/// @param Width - The byte width of this immediate in the instruction
///
/// If the getOpInfo() function was set when setupForSymbolicDisassembly() was
/// called then that function is called to get any symbolic information for the
/// immediate in the instruction using the Address, Offset and Width. If that
/// returns non-zero then the symbolic information it returns is used to create
/// an MCExpr and that is added as an operand to the MCInst. If getOpInfo()
/// returns zero and isBranch is true then a symbol look up for immediate Value
/// is done and if a symbol is found an MCExpr is created with that, else
/// an MCExpr with the immediate Value is created. This function returns true
/// if it adds an operand to the MCInst and false otherwise.
static bool tryAddingSymbolicOperand(int64_t Value, bool isBranch,
uint64_t Address, uint64_t Offset,
uint64_t Width, MCInst &MI,
const MCDisassembler *Dis) {
LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
struct LLVMOpInfo1 SymbolicOp;
memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
SymbolicOp.Value = Value;
void *DisInfo = Dis->getDisInfoBlock();
if (!getOpInfo ||
!getOpInfo(DisInfo, Address, Offset, Width, 1, &SymbolicOp)) {
// Clear SymbolicOp.Value from above and also all other fields.
memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
if (!SymbolLookUp)
return false;
uint64_t ReferenceType;
if (isBranch)
ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
else
ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
const char *ReferenceName;
const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address,
&ReferenceName);
if (Name) {
SymbolicOp.AddSymbol.Name = Name;
SymbolicOp.AddSymbol.Present = true;
}
// For branches always create an MCExpr so it gets printed as hex address.
else if (isBranch) {
SymbolicOp.Value = Value;
}
if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
(*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
if (!Name && !isBranch)
return false;
}
MCContext *Ctx = Dis->getMCContext();
const MCExpr *Add = NULL;
if (SymbolicOp.AddSymbol.Present) {
if (SymbolicOp.AddSymbol.Name) {
StringRef Name(SymbolicOp.AddSymbol.Name);
MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
Add = MCSymbolRefExpr::Create(Sym, *Ctx);
} else {
Add = MCConstantExpr::Create((int)SymbolicOp.AddSymbol.Value, *Ctx);
}
}
const MCExpr *Sub = NULL;
if (SymbolicOp.SubtractSymbol.Present) {
if (SymbolicOp.SubtractSymbol.Name) {
StringRef Name(SymbolicOp.SubtractSymbol.Name);
MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
} else {
Sub = MCConstantExpr::Create((int)SymbolicOp.SubtractSymbol.Value, *Ctx);
}
}
const MCExpr *Off = NULL;
if (SymbolicOp.Value != 0)
Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
const MCExpr *Expr;
if (Sub) {
const MCExpr *LHS;
if (Add)
LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
else
LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
if (Off != 0)
Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
else
Expr = LHS;
} else if (Add) {
if (Off != 0)
Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
else
Expr = Add;
} else {
if (Off != 0)
Expr = Off;
else
Expr = MCConstantExpr::Create(0, *Ctx);
}
MI.addOperand(MCOperand::CreateExpr(Expr));
return true;
}
/// translateImmediate - Appends an immediate operand to an MCInst.
///
/// @param mcInst - The MCInst to append to.
/// @param immediate - The immediate value to append.
/// @param operand - The operand, as stored in the descriptor table.
/// @param insn - The internal instruction.
static void translateImmediate(MCInst &mcInst, uint64_t immediate,
const OperandSpecifier &operand,
InternalInstruction &insn,
const MCDisassembler *Dis) {
// Sign-extend the immediate if necessary.
OperandType type = operand.type;
if (type == TYPE_RELv) {
switch (insn.displacementSize) {
default:
break;
case 1:
type = TYPE_MOFFS8;
break;
case 2:
type = TYPE_MOFFS16;
break;
case 4:
type = TYPE_MOFFS32;
break;
case 8:
type = TYPE_MOFFS64;
break;
}
}
// 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) {
uint32_t Opcode = mcInst.getOpcode();
switch (operand.encoding) {
default:
break;
case ENCODING_IB:
// Special case those X86 instructions that use the imm8 as a set of
// bits, bit count, etc. and are not sign-extend.
if (Opcode != X86::BLENDPSrri && Opcode != X86::BLENDPDrri &&
Opcode != X86::PBLENDWrri && Opcode != X86::MPSADBWrri &&
Opcode != X86::DPPSrri && Opcode != X86::DPPDrri &&
Opcode != X86::INSERTPSrr && Opcode != X86::VBLENDPSYrri &&
Opcode != X86::VBLENDPSYrmi && Opcode != X86::VBLENDPDYrri &&
Opcode != X86::VBLENDPDYrmi && Opcode != X86::VPBLENDWrri &&
Opcode != X86::VMPSADBWrri && Opcode != X86::VDPPSYrri &&
Opcode != X86::VDPPSYrmi && Opcode != X86::VDPPDrri &&
Opcode != X86::VINSERTPSrr)
type = TYPE_MOFFS8;
break;
case ENCODING_IW:
type = TYPE_MOFFS16;
break;
case ENCODING_ID:
type = TYPE_MOFFS32;
break;
case ENCODING_IO:
type = TYPE_MOFFS64;
break;
}
}
bool isBranch = false;
uint64_t pcrel = 0;
switch (type) {
case TYPE_XMM128:
mcInst.addOperand(MCOperand::CreateReg(X86::XMM0 + (immediate >> 4)));
return;
case TYPE_XMM256:
mcInst.addOperand(MCOperand::CreateReg(X86::YMM0 + (immediate >> 4)));
return;
case TYPE_REL8:
isBranch = true;
pcrel = insn.startLocation + insn.immediateOffset + insn.immediateSize;
// fall through to sign extend the immediate if needed.
case TYPE_MOFFS8:
if(immediate & 0x80)
immediate |= ~(0xffull);
break;
case TYPE_MOFFS16:
if(immediate & 0x8000)
immediate |= ~(0xffffull);
break;
case TYPE_REL32:
case TYPE_REL64:
isBranch = true;
pcrel = insn.startLocation + insn.immediateOffset + insn.immediateSize;
// fall through to sign extend the immediate if needed.
case TYPE_MOFFS32:
if(immediate & 0x80000000)
immediate |= ~(0xffffffffull);
break;
case TYPE_MOFFS64:
default:
// operand is 64 bits wide. Do nothing.
break;
}
if(!tryAddingSymbolicOperand(immediate + pcrel, isBranch, insn.startLocation,
insn.immediateOffset, insn.immediateSize,
mcInst, Dis))
mcInst.addOperand(MCOperand::CreateImm(immediate));
}
/// translateRMRegister - Translates a register stored in the R/M field of the
/// ModR/M byte to its LLVM equivalent and appends it to an MCInst.
/// @param mcInst - The MCInst to append to.
/// @param insn - The internal instruction to extract the R/M field
/// from.
/// @return - 0 on success; -1 otherwise
static bool translateRMRegister(MCInst &mcInst,
InternalInstruction &insn) {
if (insn.eaBase == EA_BASE_sib || insn.eaBase == EA_BASE_sib64) {
debug("A R/M register operand may not have a SIB byte");
return true;
}
switch (insn.eaBase) {
default:
debug("Unexpected EA base register");
return true;
case EA_BASE_NONE:
debug("EA_BASE_NONE for ModR/M base");
return true;
#define ENTRY(x) case EA_BASE_##x:
ALL_EA_BASES
#undef ENTRY
debug("A R/M register operand may not have a base; "
"the operand must be a register.");
return true;
#define ENTRY(x) \
case EA_REG_##x: \
mcInst.addOperand(MCOperand::CreateReg(X86::x)); break;
ALL_REGS
#undef ENTRY
}
return false;
}
/// translateRMMemory - Translates a memory operand stored in the Mod and R/M
/// fields of an internal instruction (and possibly its SIB byte) to a memory
/// operand in LLVM's format, and appends it to an MCInst.
///
/// @param mcInst - The MCInst to append to.
/// @param insn - The instruction to extract Mod, R/M, and SIB fields
/// from.
/// @return - 0 on success; nonzero otherwise
static bool translateRMMemory(MCInst &mcInst, InternalInstruction &insn,
const MCDisassembler *Dis) {
// Addresses in an MCInst are represented as five operands:
// 1. basereg (register) The R/M base, or (if there is a SIB) the
// SIB base
// 2. scaleamount (immediate) 1, or (if there is a SIB) the specified
// scale amount
// 3. indexreg (register) x86_registerNONE, or (if there is a SIB)
// the index (which is multiplied by the
// scale amount)
// 4. displacement (immediate) 0, or the displacement if there is one
// 5. segmentreg (register) x86_registerNONE for now, but could be set
// if we have segment overrides
MCOperand baseReg;
MCOperand scaleAmount;
MCOperand indexReg;
MCOperand displacement;
MCOperand segmentReg;
uint64_t pcrel = 0;
if (insn.eaBase == EA_BASE_sib || insn.eaBase == EA_BASE_sib64) {
if (insn.sibBase != SIB_BASE_NONE) {
switch (insn.sibBase) {
default:
debug("Unexpected sibBase");
return true;
#define ENTRY(x) \
case SIB_BASE_##x: \
baseReg = MCOperand::CreateReg(X86::x); break;
ALL_SIB_BASES
#undef ENTRY
}
} else {
baseReg = MCOperand::CreateReg(0);
}
if (insn.sibIndex != SIB_INDEX_NONE) {
switch (insn.sibIndex) {
default:
debug("Unexpected sibIndex");
return true;
#define ENTRY(x) \
case SIB_INDEX_##x: \
indexReg = MCOperand::CreateReg(X86::x); break;
EA_BASES_32BIT
EA_BASES_64BIT
#undef ENTRY
}
} else {
indexReg = MCOperand::CreateReg(0);
}
scaleAmount = MCOperand::CreateImm(insn.sibScale);
} else {
switch (insn.eaBase) {
case EA_BASE_NONE:
if (insn.eaDisplacement == EA_DISP_NONE) {
debug("EA_BASE_NONE and EA_DISP_NONE for ModR/M base");
return true;
}
if (insn.mode == MODE_64BIT){
pcrel = insn.startLocation +
insn.displacementOffset + insn.displacementSize;
baseReg = MCOperand::CreateReg(X86::RIP); // Section 2.2.1.6
}
else
baseReg = MCOperand::CreateReg(0);
indexReg = MCOperand::CreateReg(0);
break;
case EA_BASE_BX_SI:
baseReg = MCOperand::CreateReg(X86::BX);
indexReg = MCOperand::CreateReg(X86::SI);
break;
case EA_BASE_BX_DI:
baseReg = MCOperand::CreateReg(X86::BX);
indexReg = MCOperand::CreateReg(X86::DI);
break;
case EA_BASE_BP_SI:
baseReg = MCOperand::CreateReg(X86::BP);
indexReg = MCOperand::CreateReg(X86::SI);
break;
case EA_BASE_BP_DI:
baseReg = MCOperand::CreateReg(X86::BP);
indexReg = MCOperand::CreateReg(X86::DI);
break;
default:
indexReg = MCOperand::CreateReg(0);
switch (insn.eaBase) {
default:
debug("Unexpected eaBase");
return true;
// Here, we will use the fill-ins defined above. However,
// BX_SI, BX_DI, BP_SI, and BP_DI are all handled above and
// sib and sib64 were handled in the top-level if, so they're only
// placeholders to keep the compiler happy.
#define ENTRY(x) \
case EA_BASE_##x: \
baseReg = MCOperand::CreateReg(X86::x); break;
ALL_EA_BASES
#undef ENTRY
#define ENTRY(x) case EA_REG_##x:
ALL_REGS
#undef ENTRY
debug("A R/M memory operand may not be a register; "
"the base field must be a base.");
return true;
}
}
scaleAmount = MCOperand::CreateImm(1);
}
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);
mcInst.addOperand(scaleAmount);
mcInst.addOperand(indexReg);
if(!tryAddingSymbolicOperand(insn.displacement + pcrel, false,
insn.startLocation, insn.displacementOffset,
insn.displacementSize, mcInst, Dis))
mcInst.addOperand(displacement);
mcInst.addOperand(segmentReg);
return false;
}
/// translateRM - Translates an operand stored in the R/M (and possibly SIB)
/// byte of an instruction to LLVM form, and appends it to an MCInst.
///
/// @param mcInst - The MCInst to append to.
/// @param operand - The operand, as stored in the descriptor table.
/// @param insn - The instruction to extract Mod, R/M, and SIB fields
/// from.
/// @return - 0 on success; nonzero otherwise
static bool translateRM(MCInst &mcInst, const OperandSpecifier &operand,
InternalInstruction &insn, const MCDisassembler *Dis) {
switch (operand.type) {
default:
debug("Unexpected type for a R/M operand");
return true;
case TYPE_R8:
case TYPE_R16:
case TYPE_R32:
case TYPE_R64:
case TYPE_Rv:
case TYPE_MM:
case TYPE_MM32:
case TYPE_MM64:
case TYPE_XMM:
case TYPE_XMM32:
case TYPE_XMM64:
case TYPE_XMM128:
case TYPE_XMM256:
case TYPE_DEBUGREG:
case TYPE_CONTROLREG:
return translateRMRegister(mcInst, insn);
case TYPE_M:
case TYPE_M8:
case TYPE_M16:
case TYPE_M32:
case TYPE_M64:
case TYPE_M128:
case TYPE_M256:
case TYPE_M512:
case TYPE_Mv:
case TYPE_M32FP:
case TYPE_M64FP:
case TYPE_M80FP:
case TYPE_M16INT:
case TYPE_M32INT:
case TYPE_M64INT:
case TYPE_M1616:
case TYPE_M1632:
case TYPE_M1664:
case TYPE_LEA:
return translateRMMemory(mcInst, insn, Dis);
}
}
/// translateFPRegister - Translates a stack position on the FPU stack to its
/// LLVM form, and appends it to an MCInst.
///
/// @param mcInst - The MCInst to append to.
/// @param stackPos - The stack position to translate.
/// @return - 0 on success; nonzero otherwise.
static bool translateFPRegister(MCInst &mcInst,
uint8_t stackPos) {
if (stackPos >= 8) {
debug("Invalid FP stack position");
return true;
}
mcInst.addOperand(MCOperand::CreateReg(X86::ST0 + stackPos));
return false;
}
/// translateOperand - Translates an operand stored in an internal instruction
/// to LLVM's format and appends it to an MCInst.
///
/// @param mcInst - The MCInst to append to.
/// @param operand - The operand, as stored in the descriptor table.
/// @param insn - The internal instruction.
/// @return - false on success; true otherwise.
static bool translateOperand(MCInst &mcInst, const OperandSpecifier &operand,
InternalInstruction &insn,
const MCDisassembler *Dis) {
switch (operand.encoding) {
default:
debug("Unhandled operand encoding during translation");
return true;
case ENCODING_REG:
translateRegister(mcInst, insn.reg);
return false;
case ENCODING_RM:
return translateRM(mcInst, operand, insn, Dis);
case ENCODING_CB:
case ENCODING_CW:
case ENCODING_CD:
case ENCODING_CP:
case ENCODING_CO:
case ENCODING_CT:
debug("Translation of code offsets isn't supported.");
return true;
case ENCODING_IB:
case ENCODING_IW:
case ENCODING_ID:
case ENCODING_IO:
case ENCODING_Iv:
case ENCODING_Ia:
translateImmediate(mcInst,
insn.immediates[insn.numImmediatesTranslated++],
operand,
insn,
Dis);
return false;
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_VVVV:
translateRegister(mcInst, insn.vvvv);
return false;
case ENCODING_DUP:
return translateOperand(mcInst,
insn.spec->operands[operand.type - TYPE_DUP0],
insn, Dis);
}
}
/// translateInstruction - Translates an internal instruction and all its
/// operands to an MCInst.
///
/// @param mcInst - The MCInst to populate with the instruction's data.
/// @param insn - The internal instruction.
/// @return - false on success; true otherwise.
static bool translateInstruction(MCInst &mcInst,
InternalInstruction &insn,
const MCDisassembler *Dis) {
if (!insn.spec) {
debug("Instruction has no specification");
return true;
}
mcInst.setOpcode(insn.instructionID);
int index;
insn.numImmediatesTranslated = 0;
for (index = 0; index < X86_MAX_OPERANDS; ++index) {
if (insn.spec->operands[index].encoding != ENCODING_NONE) {
if (translateOperand(mcInst, insn.spec->operands[index], insn, Dis)) {
return true;
}
}
}
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());
}
extern "C" void LLVMInitializeX86Disassembler() {
// Register the disassembler.
TargetRegistry::RegisterMCDisassembler(TheX86_32Target,
createX86_32Disassembler);
TargetRegistry::RegisterMCDisassembler(TheX86_64Target,
createX86_64Disassembler);
}
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