LLVM API Documentation

Defines | Typedefs | Functions
X86DisassemblerDecoder.c 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.c:

Go to the source code of this file.

Defines

#define TRUE   1
#define FALSE   0
#define debug(s)   do { x86DisassemblerDebug(__FILE__, __LINE__, s); } while (0)
#define CONSUME_FUNC(name, type)
#define GENERIC_FIXUP_FUNC(name, base, prefix)

Typedefs

typedef int8_t bool

Functions

static InstructionContext contextForAttrs (uint8_t attrMask)
static int modRMRequired (OpcodeType type, InstructionContext insnContext, uint8_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, uint8_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 readOpcodeModifier (struct InternalInstruction *insn)
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 readOperands (struct InternalInstruction *insn)
int decodeInstruction (struct InternalInstruction *insn, byteReader_t reader, const void *readerArg, dlog_t logger, void *loggerArg, const void *miiArg, uint64_t startLoc, DisassemblerMode mode)

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 196 of file X86DisassemblerDecoder.c.

#define debug (   s)    do { x86DisassemblerDebug(__FILE__, __LINE__, s); } while (0)

Definition at line 31 of file X86DisassemblerDecoder.c.

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

#define FALSE   0

Definition at line 26 of file X86DisassemblerDecoder.c.

Referenced by is16BitEquivalent(), isPrefixAtLocation(), readDisplacement(), and readPrefixes().

#define GENERIC_FIXUP_FUNC (   name,
  base,
  prefix 
)

Definition at line 1211 of file X86DisassemblerDecoder.c.

#define TRUE   1

Definition at line 25 of file X86DisassemblerDecoder.c.

Referenced by is16BitEquivalent(), isPrefixAtLocation(), readDisplacement(), readModRM(), readOpcodeModifier(), readPrefixes(), and readSIB().

Typedef Documentation

typedef int8_t bool

Definition at line 28 of file X86DisassemblerDecoder.c.

Function Documentation

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

Definition at line 172 of file X86DisassemblerDecoder.c.

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

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

static InstructionContext contextForAttrs ( uint8_t  attrMask) [static]

Definition at line 45 of file X86DisassemblerDecoder.c.

References CONTEXTS_SYM.

Referenced by getIDWithAttrMask().

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

Definition at line 239 of file X86DisassemblerDecoder.c.

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

Referenced by decodeInstruction(), fixupReg(), getID(), readDisplacement(), readImmediate(), readModRM(), readOpcode(), readOpcodeModifier(), readOpcodeRegister(), readOperands(), readPrefixes(), readSIB(), and readVVVV().

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

Definition at line 100 of file X86DisassemblerDecoder.c.

References debug, modFromModRM, ModRMDecision::modrm_type, ONEBYTE, ONEBYTE_SYM, THREEBYTE38_SYM, THREEBYTE3A_SYM, THREEBYTE_38, THREEBYTE_3A, THREEBYTE_A6, THREEBYTE_A7, THREEBYTEA6_SYM, THREEBYTEA7_SYM, TWOBYTE, and TWOBYTE_SYM.

Referenced by getIDWithAttrMask().

int decodeInstruction ( struct InternalInstruction *  insn,
byteReader_t  reader,
const void *  readerArg,
dlog_t  logger,
void *  loggerArg,
const void *  miiArg,
uint64_t  startLoc,
DisassemblerMode  mode 
)

Definition at line 1639 of file X86DisassemblerDecoder.c.

References dbgprintf(), InternalInstruction::dlog, InternalInstruction::dlogArg, getID(), InternalInstruction::instructionID, InternalInstruction::length, logger(), llvm::LibFunc::memset, InternalInstruction::mode, InternalInstruction::numImmediatesConsumed, InternalInstruction::operands, InternalInstruction::reader, InternalInstruction::readerArg, InternalInstruction::readerCursor, readOpcode(), readOperands(), readPrefixes(), InternalInstruction::spec, and InternalInstruction::startLocation.

Referenced by llvm::X86Disassembler::X86GenericDisassembler::getInstruction().

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

Definition at line 1290 of file X86DisassemblerDecoder.c.

References dbgprintf(), and debug.

Referenced by readOperands().

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

Definition at line 739 of file X86DisassemblerDecoder.c.

References dbgprintf(), getIDWithAttrMask(), InternalInstruction::instructionID, is16BitEquivalent(), isPrefixAtLocation(), lFromVEX2of2, lFromVEX3of3, InternalInstruction::mode, MODE_64BIT, InternalInstruction::necessaryPrefixLocation, ONEBYTE, InternalInstruction::opcode, InternalInstruction::opcodeType, ppFromVEX2of2, ppFromVEX3of3, InternalInstruction::prefixPresent, InternalInstruction::rexPrefix, InternalInstruction::spec, specifierForUID(), VEX_PREFIX_66, VEX_PREFIX_F2, VEX_PREFIX_F3, InternalInstruction::vexPrefix, InternalInstruction::vexSize, and x86DisassemblerGetInstrName().

Referenced by decodeInstruction().

static int getIDWithAttrMask ( uint16_t *  instructionID,
struct InternalInstruction *  insn,
uint8_t  attrMask 
) [static]

Definition at line 672 of file X86DisassemblerDecoder.c.

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

Referenced by getID().

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

Definition at line 710 of file X86DisassemblerDecoder.c.

References FALSE, and TRUE.

Referenced by getID().

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

Definition at line 283 of file X86DisassemblerDecoder.c.

References FALSE, InternalInstruction::prefixLocations, InternalInstruction::prefixPresent, and TRUE.

Referenced by getID().

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

Definition at line 188 of file X86DisassemblerDecoder.c.

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

Referenced by readPrefixes().

static int modRMRequired ( OpcodeType  type,
InstructionContext  insnContext,
uint8_t  opcode 
) [static]

Definition at line 60 of file X86DisassemblerDecoder.c.

References OpcodeDecision::modRMDecisions, ONEBYTE, ONEBYTE_SYM, ContextDecision::opcodeDecisions, THREEBYTE38_SYM, THREEBYTE3A_SYM, THREEBYTE_38, THREEBYTE_3A, THREEBYTE_A6, THREEBYTE_A7, THREEBYTEA6_SYM, THREEBYTEA7_SYM, TWOBYTE, and TWOBYTE_SYM.

Referenced by getIDWithAttrMask().

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

Definition at line 1034 of file X86DisassemblerDecoder.c.

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

Referenced by readModRM().

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

Definition at line 1425 of file X86DisassemblerDecoder.c.

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

Referenced by readOperands().

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

Definition at line 1079 of file X86DisassemblerDecoder.c.

References InternalInstruction::addressSize, bFromREX, consumeByte(), InternalInstruction::consumedModRM, dbgprintf(), EA_BASE_NONE, EA_DISP_16, EA_DISP_32, EA_DISP_8, EA_DISP_NONE, InternalInstruction::eaBase, InternalInstruction::eaBaseBase, InternalInstruction::eaDisplacement, InternalInstruction::eaRegBase, modFromModRM, InternalInstruction::modRM, readDisplacement(), readSIB(), InternalInstruction::reg, InternalInstruction::regBase, regFromModRM, InternalInstruction::registerSize, InternalInstruction::rexPrefix, rFromREX, rmFromModRM, and TRUE.

Referenced by getIDWithAttrMask(), and readOperands().

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

Definition at line 553 of file X86DisassemblerDecoder.c.

References consumeByte(), dbgprintf(), mmmmmFromVEX2of3, ONEBYTE, InternalInstruction::opcode, InternalInstruction::opcodeType, THREEBYTE_38, THREEBYTE_3A, THREEBYTE_A6, THREEBYTE_A7, InternalInstruction::threeByteEscape, TWOBYTE, InternalInstruction::twoByteEscape, VEX_LOB_0F, VEX_LOB_0F38, VEX_LOB_0F3A, InternalInstruction::vexPrefix, and InternalInstruction::vexSize.

Referenced by decodeInstruction().

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

Definition at line 1340 of file X86DisassemblerDecoder.c.

References InternalInstruction::consumedOpcodeModifier, dbgprintf(), debug, InstructionSpecifier::modifierBase, InstructionSpecifier::modifierType, InternalInstruction::modRM, InternalInstruction::opcode, InternalInstruction::opcodeModifier, InternalInstruction::spec, and TRUE.

Referenced by readOpcodeRegister(), and readOperands().

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

Definition at line 1375 of file X86DisassemblerDecoder.c.

References bFromREX, dbgprintf(), InternalInstruction::opcodeModifier, InternalInstruction::opcodeRegister, readOpcodeModifier(), InternalInstruction::registerSize, and InternalInstruction::rexPrefix.

Referenced by readOperands().

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

Definition at line 1502 of file X86DisassemblerDecoder.c.

References InternalInstruction::addressSize, dbgprintf(), fixupReg(), InternalInstruction::immediates, InternalInstruction::immediateSize, InternalInstruction::numImmediatesConsumed, readImmediate(), readModRM(), readOpcodeModifier(), readOpcodeRegister(), readVVVV(), InternalInstruction::spec, InternalInstruction::vvvv, and X86_MAX_OPERANDS.

Referenced by decodeInstruction().

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

Definition at line 303 of file X86DisassemblerDecoder.c.

References InternalInstruction::addressSize, bFromVEX2of3, consumeByte(), dbgprintf(), debug, InternalInstruction::displacementSize, FALSE, InternalInstruction::immediateSize, lookAtByte(), InternalInstruction::mode, MODE_16BIT, MODE_32BIT, MODE_64BIT, InternalInstruction::necessaryPrefixLocation, ppFromVEX2of2, ppFromVEX3of3, InternalInstruction::readerCursor, InternalInstruction::registerSize, InternalInstruction::rexPrefix, rFromVEX2of2, rFromVEX2of3, SEG_OVERRIDE_CS, SEG_OVERRIDE_DS, SEG_OVERRIDE_ES, SEG_OVERRIDE_FS, SEG_OVERRIDE_GS, SEG_OVERRIDE_SS, InternalInstruction::segmentOverride, setPrefixPresent(), InternalInstruction::startLocation, TRUE, unconsumeByte(), VEX_PREFIX_66, InternalInstruction::vexPrefix, InternalInstruction::vexSize, wFromREX, wFromVEX3of3, and xFromVEX2of3.

Referenced by decodeInstruction().

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

Definition at line 936 of file X86DisassemblerDecoder.c.

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

Referenced by readModRM().

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

Definition at line 1479 of file X86DisassemblerDecoder.c.

References dbgprintf(), InternalInstruction::mode, MODE_64BIT, InternalInstruction::vexPrefix, InternalInstruction::vexSize, InternalInstruction::vvvv, vvvvFromVEX2of2, and vvvvFromVEX3of3.

Referenced by readOperands().

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

Definition at line 266 of file X86DisassemblerDecoder.c.

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

Referenced by readPrefixes().

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

Definition at line 158 of file X86DisassemblerDecoder.c.

References INSTRUCTIONS_SYM.

Referenced by getID().

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

Definition at line 192 of file X86DisassemblerDecoder.c.

References InternalInstruction::readerCursor.

Referenced by readPrefixes().

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