LLVM API Documentation

Classes | Defines | Functions
X86DisassemblerDecoder.cpp File Reference
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "X86DisassemblerDecoder.h"
#include "X86GenDisassemblerTables.inc"
Include dependency graph for X86DisassemblerDecoder.cpp:

Go to the source code of this file.

Classes

struct  ModRMDecision
struct  OpcodeDecision
struct  ContextDecision

Defines

#define debug(s)   do { Debug(__FILE__, __LINE__, s); } while (0)
#define CONSUME_FUNC(name, type)
#define GENERIC_FIXUP_FUNC(name, base, prefix)

Functions

static InstructionContext contextForAttrs (uint16_t attrMask)
static int modRMRequired (OpcodeType type, InstructionContext insnContext, uint16_t opcode)
static InstrUID decode (OpcodeType type, InstructionContext insnContext, uint8_t opcode, uint8_t modRM)
static struct
InstructionSpecifier * 		specifierForUID (InstrUID uid)
static int consumeByte (struct InternalInstruction *insn, uint8_t *byte)
static int lookAtByte (struct InternalInstruction *insn, uint8_t *byte)
static void unconsumeByte (struct InternalInstruction *insn)
static void dbgprintf (struct InternalInstruction *insn, const char *format,...)
static void setPrefixPresent (struct InternalInstruction *insn, uint8_t prefix, uint64_t location)
static bool isPrefixAtLocation (struct InternalInstruction *insn, uint8_t prefix, uint64_t location)
static int readPrefixes (struct InternalInstruction *insn)
static int readOpcode (struct InternalInstruction *insn)
static int readModRM (struct InternalInstruction *insn)
static int getIDWithAttrMask (uint16_t *instructionID, struct InternalInstruction *insn, uint16_t attrMask)
static bool is16BitEquivalent (const char *orig, const char *equiv)
static int getID (struct InternalInstruction *insn, const void *miiArg)
static int readSIB (struct InternalInstruction *insn)
static int readDisplacement (struct InternalInstruction *insn)
static int fixupReg (struct InternalInstruction *insn, const struct OperandSpecifier *op)
static int readOpcodeRegister (struct InternalInstruction *insn, uint8_t size)
static int readImmediate (struct InternalInstruction *insn, uint8_t size)
static int readVVVV (struct InternalInstruction *insn)
static int readMaskRegister (struct InternalInstruction *insn)
static int readOperands (struct InternalInstruction *insn)

Define Documentation

#define CONSUME_FUNC (   name,
  type 
)
Value:
static int name(struct InternalInstruction* insn, type* ptr) {  \
    type combined = 0;                                            \
    unsigned offset;                                              \
    for (offset = 0; offset < sizeof(type); ++offset) {           \
      uint8_t byte;                                               \
      int ret = insn->reader(insn->readerArg,                     \
                             &byte,                               \
                             insn->readerCursor + offset);        \
      if (ret)                                                    \
        return ret;                                               \
      combined = combined | ((uint64_t)byte << (offset * 8));     \
    }                                                             \
    *ptr = combined;                                              \
    insn->readerCursor += sizeof(type);                           \
    return 0;                                                     \
  }

Definition at line 222 of file X86DisassemblerDecoder.cpp.

#define debug (   s)    do { Debug(__FILE__, __LINE__, s); } while (0)

Definition at line 51 of file X86DisassemblerDecoder.cpp.

Referenced by decode(), fixupReg(), readImmediate(), readPrefixes(), and readSIB().

#define GENERIC_FIXUP_FUNC (   name,
  base,
  prefix 
)

Definition at line 1380 of file X86DisassemblerDecoder.cpp.

Function Documentation

static int consumeByte ( struct InternalInstruction *  insn,
uint8_t *  byte 
) [static]

Definition at line 198 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::reader, llvm::X86Disassembler::InternalInstruction::readerArg, and llvm::X86Disassembler::InternalInstruction::readerCursor.

Referenced by readImmediate(), readModRM(), readOpcode(), readPrefixes(), and readSIB().

static InstructionContext contextForAttrs ( uint16_t  attrMask) [static]

Definition at line 65 of file X86DisassemblerDecoder.cpp.

References CONTEXTS_SYM.

Referenced by getIDWithAttrMask().

static void dbgprintf ( struct InternalInstruction *  insn,
const char *  format,
  ... 
) [static]

Definition at line 265 of file X86DisassemblerDecoder.cpp.

References llvm::format(), and llvm::LibFunc::vsnprintf.

Referenced by llvm::X86Disassembler::decodeInstruction(), fixupReg(), getID(), readDisplacement(), readImmediate(), readMaskRegister(), readModRM(), readOpcode(), readOpcodeRegister(), readOperands(), readPrefixes(), readSIB(), and readVVVV().

static InstrUID decode ( OpcodeType  type,
InstructionContext  insnContext,
uint8_t  opcode,
uint8_t  modRM 
) [static]

Definition at line 123 of file X86DisassemblerDecoder.cpp.

References debug, ModRMDecision::instructionIDs, modFromModRM, ModRMDecision::modrm_type, llvm::X86Disassembler::ONEBYTE, ONEBYTE_SYM, THREEBYTE38_SYM, THREEBYTE3A_SYM, llvm::X86Disassembler::THREEBYTE_38, llvm::X86Disassembler::THREEBYTE_3A, llvm::X86Disassembler::TWOBYTE, TWOBYTE_SYM, llvm::X86Disassembler::XOP8_MAP, XOP8_MAP_SYM, llvm::X86Disassembler::XOP9_MAP, XOP9_MAP_SYM, llvm::X86Disassembler::XOPA_MAP, and XOPA_MAP_SYM.

Referenced by getIDWithAttrMask().

static int fixupReg ( struct InternalInstruction *  insn,
const struct OperandSpecifier *  op 
) [static]

Definition at line 1465 of file X86DisassemblerDecoder.cpp.

References CASE_ENCODING_RM, dbgprintf(), and debug.

Referenced by readOperands().

static int getID ( struct InternalInstruction *  insn,
const void *  miiArg 
) [static]

Definition at line 877 of file X86DisassemblerDecoder.cpp.

References aaaFromEVEX4of4, bFromEVEX4of4, dbgprintf(), getIDWithAttrMask(), llvm::X86Disassembler::GetInstrName(), llvm::X86Disassembler::InternalInstruction::instructionID, is16BitEquivalent(), isPrefixAtLocation(), l2FromEVEX4of4, lFromEVEX4of4, lFromVEX2of2, lFromVEX3of3, lFromXOP3of3, llvm::X86Disassembler::InternalInstruction::mode, llvm::X86Disassembler::MODE_16BIT, llvm::X86Disassembler::MODE_64BIT, llvm::X86Disassembler::InternalInstruction::necessaryPrefixLocation, llvm::X86Disassembler::ONEBYTE, llvm::X86Disassembler::InternalInstruction::opcode, llvm::X86Disassembler::InternalInstruction::opcodeType, llvm::X86Disassembler::InstructionSpecifier::operands, ppFromEVEX3of4, ppFromVEX2of2, ppFromVEX3of3, ppFromXOP3of3, llvm::X86Disassembler::InternalInstruction::prefixPresent, llvm::X86Disassembler::InternalInstruction::rexPrefix, llvm::X86Disassembler::InternalInstruction::spec, specifierForUID(), llvm::X86Disassembler::TYPE_EVEX, llvm::X86Disassembler::TYPE_NO_VEX_XOP, llvm::X86Disassembler::TYPE_VEX_2B, llvm::X86Disassembler::TYPE_VEX_3B, llvm::X86Disassembler::TYPE_XOP, llvm::X86Disassembler::InternalInstruction::vectorExtensionPrefix, llvm::X86Disassembler::InternalInstruction::vectorExtensionType, llvm::X86Disassembler::VEX_PREFIX_66, llvm::X86Disassembler::VEX_PREFIX_F2, llvm::X86Disassembler::VEX_PREFIX_F3, and zFromEVEX4of4.

Referenced by llvm::X86Disassembler::decodeInstruction().

static int getIDWithAttrMask ( uint16_t *  instructionID,
struct InternalInstruction *  insn,
uint16_t  attrMask 
) [static]

Definition at line 812 of file X86DisassemblerDecoder.cpp.

References contextForAttrs(), decode(), llvm::X86Disassembler::InternalInstruction::modRM, modRMRequired(), llvm::X86Disassembler::InternalInstruction::opcode, llvm::X86Disassembler::InternalInstruction::opcodeType, and readModRM().

Referenced by getID().

static bool is16BitEquivalent ( const char *  orig,
const char *  equiv 
) [static]

Definition at line 848 of file X86DisassemblerDecoder.cpp.

Referenced by getID().

static bool isPrefixAtLocation ( struct InternalInstruction *  insn,
uint8_t  prefix,
uint64_t  location 
) [static]

Definition at line 309 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::prefixLocations, and llvm::X86Disassembler::InternalInstruction::prefixPresent.

Referenced by getID().

static int lookAtByte ( struct InternalInstruction *  insn,
uint8_t *  byte 
) [static]

Definition at line 214 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::reader, llvm::X86Disassembler::InternalInstruction::readerArg, and llvm::X86Disassembler::InternalInstruction::readerCursor.

Referenced by readPrefixes().

static int modRMRequired ( OpcodeType  type,
InstructionContext  insnContext,
uint16_t  opcode 
) [static]

Definition at line 80 of file X86DisassemblerDecoder.cpp.

References OpcodeDecision::modRMDecisions, llvm::X86Disassembler::ONEBYTE, ONEBYTE_SYM, ContextDecision::opcodeDecisions, THREEBYTE38_SYM, THREEBYTE3A_SYM, llvm::X86Disassembler::THREEBYTE_38, llvm::X86Disassembler::THREEBYTE_3A, llvm::X86Disassembler::TWOBYTE, TWOBYTE_SYM, llvm::X86Disassembler::XOP8_MAP, XOP8_MAP_SYM, llvm::X86Disassembler::XOP9_MAP, XOP9_MAP_SYM, llvm::X86Disassembler::XOPA_MAP, and XOPA_MAP_SYM.

Referenced by getIDWithAttrMask().

static int readDisplacement ( struct InternalInstruction *  insn) [static]

Definition at line 1196 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::consumedDisplacement, dbgprintf(), llvm::X86Disassembler::InternalInstruction::displacement, llvm::X86Disassembler::InternalInstruction::displacementOffset, llvm::X86Disassembler::EA_DISP_16, llvm::X86Disassembler::EA_DISP_32, llvm::X86Disassembler::EA_DISP_8, llvm::X86Disassembler::EA_DISP_NONE, llvm::X86Disassembler::InternalInstruction::eaDisplacement, llvm::X86Disassembler::InternalInstruction::readerCursor, and llvm::X86Disassembler::InternalInstruction::startLocation.

Referenced by readModRM().

static int readImmediate ( struct InternalInstruction *  insn,
uint8_t  size 
) [static]

Definition at line 1564 of file X86DisassemblerDecoder.cpp.

References consumeByte(), dbgprintf(), debug, llvm::X86Disassembler::InternalInstruction::immediateOffset, llvm::X86Disassembler::InternalInstruction::immediates, llvm::X86Disassembler::InternalInstruction::immediateSize, llvm::X86Disassembler::InternalInstruction::numImmediatesConsumed, llvm::X86Disassembler::InternalInstruction::readerCursor, and llvm::X86Disassembler::InternalInstruction::startLocation.

Referenced by readOperands().

static int readMaskRegister ( struct InternalInstruction *  insn) [static]

Definition at line 1648 of file X86DisassemblerDecoder.cpp.

References aaaFromEVEX4of4, dbgprintf(), llvm::X86Disassembler::TYPE_EVEX, llvm::X86Disassembler::InternalInstruction::vectorExtensionPrefix, llvm::X86Disassembler::InternalInstruction::vectorExtensionType, and llvm::X86Disassembler::InternalInstruction::writemask.

Referenced by readOperands().

static int readModRM ( struct InternalInstruction *  insn) [static]

Definition at line 1241 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::addressSize, bFromREX, consumeByte(), llvm::X86Disassembler::InternalInstruction::consumedModRM, dbgprintf(), llvm::X86Disassembler::InternalInstruction::displacementSize, llvm::X86Disassembler::EA_BASE_NONE, llvm::X86Disassembler::EA_DISP_16, llvm::X86Disassembler::EA_DISP_32, llvm::X86Disassembler::EA_DISP_8, llvm::X86Disassembler::EA_DISP_NONE, llvm::X86Disassembler::InternalInstruction::eaBase, llvm::X86Disassembler::InternalInstruction::eaBaseBase, llvm::X86Disassembler::InternalInstruction::eaDisplacement, llvm::X86Disassembler::InternalInstruction::eaRegBase, modFromModRM, llvm::X86Disassembler::InternalInstruction::modRM, r2FromEVEX2of4, readDisplacement(), readSIB(), llvm::X86Disassembler::InternalInstruction::reg, llvm::X86Disassembler::InternalInstruction::regBase, regFromModRM, llvm::X86Disassembler::InternalInstruction::registerSize, llvm::X86Disassembler::InternalInstruction::rexPrefix, rFromREX, rmFromModRM, llvm::X86Disassembler::TYPE_EVEX, llvm::X86Disassembler::InternalInstruction::vectorExtensionPrefix, llvm::X86Disassembler::InternalInstruction::vectorExtensionType, and xFromEVEX2of4.

Referenced by getIDWithAttrMask(), and readOperands().

static int readOpcode ( struct InternalInstruction *  insn) [static]

Definition at line 692 of file X86DisassemblerDecoder.cpp.

References consumeByte(), dbgprintf(), mmFromEVEX2of4, mmmmmFromVEX2of3, mmmmmFromXOP2of3, llvm::X86Disassembler::ONEBYTE, llvm::X86Disassembler::InternalInstruction::opcode, llvm::X86Disassembler::InternalInstruction::opcodeType, llvm::X86Disassembler::THREEBYTE_38, llvm::X86Disassembler::THREEBYTE_3A, llvm::X86Disassembler::TWOBYTE, llvm::X86Disassembler::TYPE_EVEX, llvm::X86Disassembler::TYPE_VEX_2B, llvm::X86Disassembler::TYPE_VEX_3B, llvm::X86Disassembler::TYPE_XOP, llvm::X86Disassembler::InternalInstruction::vectorExtensionPrefix, llvm::X86Disassembler::InternalInstruction::vectorExtensionType, llvm::X86Disassembler::VEX_LOB_0F, llvm::X86Disassembler::VEX_LOB_0F38, llvm::X86Disassembler::VEX_LOB_0F3A, llvm::X86Disassembler::XOP8_MAP, llvm::X86Disassembler::XOP9_MAP, llvm::X86Disassembler::XOP_MAP_SELECT_8, llvm::X86Disassembler::XOP_MAP_SELECT_9, llvm::X86Disassembler::XOP_MAP_SELECT_A, and llvm::X86Disassembler::XOPA_MAP.

Referenced by llvm::X86Disassembler::decodeInstruction().

static int readOpcodeRegister ( struct InternalInstruction *  insn,
uint8_t  size 
) [static]

Definition at line 1517 of file X86DisassemblerDecoder.cpp.

References bFromREX, dbgprintf(), llvm::X86Disassembler::InternalInstruction::opcode, llvm::X86Disassembler::InternalInstruction::opcodeRegister, llvm::X86Disassembler::InternalInstruction::registerSize, and llvm::X86Disassembler::InternalInstruction::rexPrefix.

Referenced by readOperands().

static int readOperands ( struct InternalInstruction *  insn) [static]

Definition at line 1666 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::addressSize, CASE_ENCODING_RM, dbgprintf(), llvm::X86Disassembler::InternalInstruction::displacement, llvm::X86Disassembler::EA_DISP_8, llvm::X86Disassembler::InternalInstruction::eaDisplacement, fixupReg(), llvm::X86Disassembler::InternalInstruction::immediates, llvm::X86Disassembler::InternalInstruction::immediateSize, llvm::X86Disassembler::InternalInstruction::numImmediatesConsumed, llvm::X86Disassembler::InstructionSpecifier::operands, readImmediate(), readMaskRegister(), readModRM(), readOpcodeRegister(), readVVVV(), llvm::X86Disassembler::InternalInstruction::spec, and llvm::X86Disassembler::InternalInstruction::vvvv.

Referenced by llvm::X86Disassembler::decodeInstruction().

static int readPrefixes ( struct InternalInstruction *  insn) [static]

Definition at line 329 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::addressSize, bFromEVEX2of4, bFromVEX2of3, bFromXOP2of3, consumeByte(), dbgprintf(), debug, llvm::X86Disassembler::InternalInstruction::displacementSize, llvm::X86Disassembler::InternalInstruction::immediateSize, lookAtByte(), llvm::X86Disassembler::InternalInstruction::mode, llvm::X86Disassembler::MODE_16BIT, llvm::X86Disassembler::MODE_32BIT, llvm::X86Disassembler::MODE_64BIT, llvm::X86Disassembler::InternalInstruction::necessaryPrefixLocation, ppFromVEX2of2, ppFromXOP3of3, llvm::X86Disassembler::InternalInstruction::readerCursor, llvm::X86Disassembler::InternalInstruction::registerSize, llvm::X86Disassembler::InternalInstruction::rexPrefix, rFromEVEX2of4, rFromVEX2of2, rFromVEX2of3, rFromXOP2of3, llvm::X86Disassembler::SEG_OVERRIDE_CS, llvm::X86Disassembler::SEG_OVERRIDE_DS, llvm::X86Disassembler::SEG_OVERRIDE_ES, llvm::X86Disassembler::SEG_OVERRIDE_FS, llvm::X86Disassembler::SEG_OVERRIDE_GS, llvm::X86Disassembler::SEG_OVERRIDE_SS, llvm::X86Disassembler::InternalInstruction::segmentOverride, setPrefixPresent(), llvm::X86Disassembler::InternalInstruction::startLocation, llvm::X86Disassembler::TYPE_EVEX, llvm::X86Disassembler::TYPE_NO_VEX_XOP, llvm::X86Disassembler::TYPE_VEX_2B, llvm::X86Disassembler::TYPE_VEX_3B, llvm::X86Disassembler::TYPE_XOP, unconsumeByte(), llvm::X86Disassembler::InternalInstruction::vectorExtensionPrefix, llvm::X86Disassembler::InternalInstruction::vectorExtensionType, llvm::X86Disassembler::VEX_PREFIX_66, wFromEVEX3of4, wFromREX, wFromVEX3of3, wFromXOP3of3, llvm::X86Disassembler::InternalInstruction::xAcquireRelease, xFromEVEX2of4, xFromVEX2of3, and xFromXOP2of3.

Referenced by llvm::X86Disassembler::decodeInstruction().

static int readSIB ( struct InternalInstruction *  insn) [static]

Definition at line 1098 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::addressSize, baseFromSIB, bFromREX, consumeByte(), llvm::X86Disassembler::InternalInstruction::consumedSIB, dbgprintf(), debug, llvm::X86Disassembler::EA_DISP_32, llvm::X86Disassembler::EA_DISP_8, llvm::X86Disassembler::InternalInstruction::eaDisplacement, indexFromSIB, modFromModRM, llvm::X86Disassembler::InternalInstruction::modRM, llvm::X86Disassembler::InternalInstruction::rexPrefix, scaleFromSIB, llvm::X86Disassembler::InternalInstruction::sib, llvm::X86Disassembler::SIB_BASE_NONE, llvm::X86Disassembler::SIB_INDEX_NONE, llvm::X86Disassembler::InternalInstruction::sibBase, llvm::X86Disassembler::InternalInstruction::sibIndex, llvm::X86Disassembler::InternalInstruction::sibScale, llvm::X86Disassembler::TYPE_EVEX, v2FromEVEX4of4, llvm::X86Disassembler::InternalInstruction::vectorExtensionPrefix, llvm::X86Disassembler::InternalInstruction::vectorExtensionType, and xFromREX.

Referenced by readModRM().

static int readVVVV ( struct InternalInstruction *  insn) [static]

Definition at line 1618 of file X86DisassemblerDecoder.cpp.

References dbgprintf(), llvm::X86Disassembler::InternalInstruction::mode, llvm::X86Disassembler::MODE_64BIT, llvm::X86Disassembler::TYPE_EVEX, llvm::X86Disassembler::TYPE_VEX_2B, llvm::X86Disassembler::TYPE_VEX_3B, llvm::X86Disassembler::TYPE_XOP, v2FromEVEX4of4, llvm::X86Disassembler::InternalInstruction::vectorExtensionPrefix, llvm::X86Disassembler::InternalInstruction::vectorExtensionType, llvm::X86Disassembler::InternalInstruction::vvvv, vvvvFromEVEX3of4, vvvvFromVEX2of2, vvvvFromVEX3of3, and vvvvFromXOP3of3.

Referenced by readOperands().

static void setPrefixPresent ( struct InternalInstruction *  insn,
uint8_t  prefix,
uint64_t  location 
) [static]

Definition at line 292 of file X86DisassemblerDecoder.cpp.

References llvm::cl::location(), llvm::X86Disassembler::InternalInstruction::prefixLocations, and llvm::X86Disassembler::InternalInstruction::prefixPresent.

Referenced by readPrefixes().

static struct InstructionSpecifier* specifierForUID ( InstrUID  uid) [static, read]

Definition at line 184 of file X86DisassemblerDecoder.cpp.

References INSTRUCTIONS_SYM.

Referenced by getID().

static void unconsumeByte ( struct InternalInstruction *  insn) [static]

Definition at line 218 of file X86DisassemblerDecoder.cpp.

References llvm::X86Disassembler::InternalInstruction::readerCursor.

Referenced by readPrefixes().

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