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#include <string>
#include <vector>
#include "binaryninjaapi.h"
#define MYLOG(...) while(0);
// #define MYLOG BinaryNinja::LogWarn
// #define MYLOG printf
using namespace std;
using namespace BinaryNinja; // for ::LogDebug, etc.
#include "decode/decode.h"
#include "disassembler.h"
#include "util.h"
bool FillInstruction(Instruction* instruction, const uint8_t* data, size_t length, uint64_t address, uint32_t extraFlags = 0, uint32_t decodeFlags = DECODE_FLAGS_PPC64, BNEndianness endian=LittleEndian)
{
instruction->numBytes = length;
switch (instruction->numBytes)
{
case 2:
{
uint16_t word16 = *(const uint16_t *) data;
// VLE is always big-endian
word16 = bswap16(word16);
return Decompose16(instruction, word16, address, decodeFlags | extraFlags);
}
case 4:
{
uint32_t word32 = *(const uint32_t *) data;
// VLE is always big endian
if (((decodeFlags & DECODE_FLAGS_VLE) != 0) || endian == BigEndian)
word32 = bswap32(word32);
return Decompose32(instruction, word32, address, decodeFlags | extraFlags);
}
default:
MYLOG("FillInstruction: unrecognized length %d", length);
LogWarn("FillInstruction: unrecognized length %d", length);
return false;
}
}
bool PushOperandTokens(string& result, const Operand* op)
{
char buf[32];
switch (op->cls)
{
case PPC_OP_REG_CRFD_IMPLY0:
case PPC_OP_REG_CRFS_IMPLY0:
if (op->reg == PPC_REG_CRF0)
return false;
result += PowerPCRegisterName(op->reg);
break;
case PPC_OP_REG_RA:
case PPC_OP_REG_RB:
case PPC_OP_REG_RD:
case PPC_OP_REG_RS:
case PPC_OP_REG_FRA:
case PPC_OP_REG_FRB:
case PPC_OP_REG_FRC:
case PPC_OP_REG_FRD:
case PPC_OP_REG_FRS:
case PPC_OP_REG_CRFD:
case PPC_OP_REG_CRFS:
case PPC_OP_REG_AV_VA:
case PPC_OP_REG_AV_VB:
case PPC_OP_REG_AV_VC:
case PPC_OP_REG_AV_VD:
case PPC_OP_REG_AV_VS:
case PPC_OP_REG_VSX_RA:
case PPC_OP_REG_VSX_RA_DWORD0:
case PPC_OP_REG_VSX_RB:
case PPC_OP_REG_VSX_RB_DWORD0:
case PPC_OP_REG_VSX_RC:
case PPC_OP_REG_VSX_RC_DWORD0:
case PPC_OP_REG_VSX_RD:
case PPC_OP_REG_VSX_RD_DWORD0:
case PPC_OP_REG_VSX_RS:
case PPC_OP_REG_VSX_RS_DWORD0:
result += PowerPCRegisterName(op->reg);
break;
case PPC_OP_UIMM:
snprintf(buf, sizeof(buf), "0x%" PRIx64, op->uimm);
result += buf;
break;
case PPC_OP_SIMM:
if (op->simm < 0 && op->simm > -0x10000)
snprintf(buf, sizeof(buf), "-0x%llx", -op->simm);
else
snprintf(buf, sizeof(buf), "0x%llx", op->simm);
result += buf;
break;
case PPC_OP_LABEL:
snprintf(buf, sizeof(buf), "0x%llx", op->label);
result += buf;
break;
case PPC_OP_CRBIT_A:
case PPC_OP_CRBIT_B:
case PPC_OP_CRBIT_D:
result += GetCRBitName(op->crbit);
break;
case PPC_OP_MEM_RA:
// eg: lwz r11, 8(r11)
//
// TODO: it would be nice to have the option to print these
// in hex; printed in decimal now for backwards compatibility
snprintf(buf, sizeof(buf), "%d", op->mem.offset);
result += buf;
result += "(";
if (op->mem.reg == PPC_REG_GPR0)
result += "0";
else
result += PowerPCRegisterName(op->mem.reg);
result += ")";
break;
default:
//MYLOG("pushing a ???\n");
result += "???";
}
return true;
}
int disassemble(uint8_t *data, uint32_t addr, string& result)
{
int rc = -1;
char buf[32];
size_t strlenMnem;
Instruction instruction;
const char* mnemonic = NULL;
size_t len = 4;
uint32_t decodeFlags = DECODE_FLAGS_PPC64;
//MYLOG("%s()\n", __func__);
size_t instructionLength = GetInstructionLength(data, len, decodeFlags);
if (instructionLength == 0)
{
MYLOG("ERROR: not enough bytes for instruction\n");
return false;
}
len = instructionLength;
if (!FillInstruction(&instruction, data, instructionLength, addr))
{
MYLOG("ERROR: FillInstruction()\n");
return -1;
}
/* mnemonic */
mnemonic = GetMnemonic(&instruction);
result = mnemonic;
if (instruction.numOperands > 0)
result += " ";
OperandsList operand_list;
memset(&operand_list, 0, sizeof(operand_list));
// The default is to just copy every operand, to simplify the
// alternate code path for special cases
operand_list.numOperands = instruction.numOperands;
for (int i = 0; i < instruction.numOperands; ++i)
{
operand_list.operands[i] = instruction.operands[i];
}
switch(instruction.id)
{
case PPC_ID_BCx:
FillBcxOperands(&operand_list, &instruction);
break;
case PPC_ID_BCCTRx:
FillBcctrxOperands(&operand_list, &instruction);
break;
case PPC_ID_BCLRx:
FillBclrxOperands(&operand_list, &instruction);
break;
case PPC_ID_VLE_SE_BC:
FillVle16BcOperands(&operand_list, &instruction);
break;
case PPC_ID_VLE_E_BCx:
FillVle32BcxOperands(&operand_list, &instruction);
break;
default:
// Already copied by default
;
}
for (int i = 0; i < operand_list.numOperands; ++i)
{
Operand* op = &(operand_list.operands[i]);
bool was_pushed = PushOperandTokens(result, op);
if (was_pushed && i < operand_list.numOperands - 1)
{
//MYLOG("pushing a comma\n");
result += ", ";
}
}
return 0;
}
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