static int i8051_op(RAnal *anal, RAnalOp *op, ut64 addr, const ut8 *buf, int len) {
op->delay = 0;
int i = 0;
while (_8051_ops[i].string && _8051_ops[i].op != (buf[0] & ~_8051_ops[i].mask)) {
i++;
}
op->size = _8051_ops[i].len;
op->jump = op->fail = -1;
op->ptr = op->val = -1;
ut8 arg1 = _8051_ops[i].arg1;
ut8 arg2 = _8051_ops[i].arg2;
switch (arg1) {
case A_DIRECT:
op->ptr = buf[1];
break;
case A_BIT:
op->ptr = arg_bit (buf[1]);
break;
case A_IMMEDIATE:
op->val = buf[1];
break;
case A_IMM16:
op->val = buf[1] * 256 + buf[2];
break;
default:
break;
}
switch (arg2) {
case A_DIRECT:
op->ptr = (arg1 == A_RI || arg1 == A_RN) ? buf[1] : buf[2];
break;
case A_BIT:
op->ptr = arg_bit ((arg1 == A_RI || arg1 == A_RN) ? buf[1] : buf[2]);
break;
case A_IMMEDIATE:
op->val = (arg1 == A_RI || arg1 == A_RN) ? buf[1] : buf[2];
break;
default:
break;
}
switch(_8051_ops[i].instr) {
case OP_PUSH:
op->type = R_ANAL_OP_TYPE_PUSH;
op->ptr = 0;
op->stackop = R_ANAL_STACK_INC;
op->stackptr = 1;
break;
case OP_POP:
op->type = R_ANAL_OP_TYPE_POP;
op->ptr = 0;
op->stackop = R_ANAL_STACK_INC;
op->stackptr = -1;
break;
case OP_RET:
op->type = R_ANAL_OP_TYPE_RET;
op->stackop = R_ANAL_STACK_INC;
op->stackptr = -2;
break;
case OP_NOP:
op->type = R_ANAL_OP_TYPE_NOP;
break;
case OP_INC:
case OP_ADD:
case OP_ADDC:
op->type = R_ANAL_OP_TYPE_ADD;
break;
case OP_DEC:
case OP_SUBB:
op->type = R_ANAL_OP_TYPE_SUB;
break;
case OP_ANL:
op->type = R_ANAL_OP_TYPE_AND;
break;
case OP_ORL:
op->type = R_ANAL_OP_TYPE_OR;
break;
case OP_XRL:
op->type = R_ANAL_OP_TYPE_XOR;
break;
case OP_CPL:
op->type = R_ANAL_OP_TYPE_CPL;
break;
case OP_XCH:
op->type = R_ANAL_OP_TYPE_XCHG;
break;
case OP_MOV:
op->type = R_ANAL_OP_TYPE_MOV;
break;
case OP_MUL:
op->type = R_ANAL_OP_TYPE_MUL;
break;
case OP_DIV:
op->type = R_ANAL_OP_TYPE_DIV;
break;
case OP_CALL:
op->type = R_ANAL_OP_TYPE_CALL;
if (arg1 == A_ADDR11) {
op->jump = arg_addr11 (addr + op->size, buf);
op->fail = addr + op->size;
} else if (arg1 == A_ADDR16) {
op->jump = 0x100 * buf[1] + buf[2];
op->fail = addr + op->size;
}
break;
case OP_JMP:
op->type = R_ANAL_OP_TYPE_JMP;
if (arg1 == A_ADDR11) {
op->jump = arg_addr11 (addr + op->size, buf);
op->fail = addr + op->size;
} else if (arg1 == A_ADDR16) {
op->jump = 0x100 * buf[1] + buf[2];
op->fail = addr + op->size;
} else if (arg1 == A_OFFSET) {
op->jump = arg_offset (addr + op->size, buf[1]);
op->fail = addr + op->size;
}
break;
case OP_CJNE:
case OP_DJNZ:
case OP_JC:
case OP_JNC:
case OP_JZ:
case OP_JNZ:
case OP_JB:
case OP_JBC:
case OP_JNB:
op->type = R_ANAL_OP_TYPE_CJMP;
if (op->size == 2) {
op->jump = arg_offset (addr + 2, buf[1]);
op->fail = addr + 2;
} else if (op->size == 3) {
op->jump = arg_offset (addr + 3, buf[2]);
op->fail = addr + 3;
}
break;
case OP_INVALID:
op->type = R_ANAL_OP_TYPE_ILL;
break;
default:
op->type = R_ANAL_OP_TYPE_UNK;
break;
}
if (op->ptr != -1 && op->refptr == 0) {
op->refptr = 1;
}
if (anal->decode) {
ut8 copy[3] = {0, 0, 0};
memcpy (copy, buf, len >= 3 ? 3 : len);
analop_esil (anal, op, addr, copy);
}
return op->size;
}
int _8051_disas (ut64 pc, RAsmOp *op, const ut8 *buf, ut64 len) {
int i = 0;
while (_8051_ops[i].string && _8051_ops[i].op != (buf[0] & ~_8051_ops[i].mask)) {
i++;
}
if (_8051_ops[i].string) {
// valid opcodes
const char* name = _8051_ops[i].string;
ut8 mask = _8051_ops[i].mask;
ut8 arg1 = _8051_ops[i].arg1;
ut8 arg2 = _8051_ops[i].arg2;
ut8 arg3 = _8051_ops[i].arg3;
ut8 oplen = _8051_ops[i].len;
switch (oplen) {
case 1:
if ((arg1 == A_RI) || (arg1 == A_RN)) {
// op @Ri; op Rn
sprintf (op->buf_asm, name, buf[0] & mask);
} else {
sprintf (op->buf_asm, "%s", name);
}
break;
case 2:
if (len>1) {
if (arg1 == A_OFFSET) {
sprintf (op->buf_asm, name, arg_offset (pc + 2, buf[1]));
} else if (arg1 == A_ADDR11) {
sprintf (op->buf_asm, name, arg_addr11 (pc + 2, buf));
} else if ((arg1 == A_RI) || (arg1 == A_RN)) {
// op @Ri, arg; op Rn, arg
if (arg2 == A_OFFSET) {
sprintf (op->buf_asm, name, buf[0] & mask, arg_offset (pc + 2, buf[1]));
} else {
sprintf (op->buf_asm, name, buf[0] & mask, buf[1]);
}
} else if ((arg2 == A_RI) || (arg2 == A_RN)) {
// op arg, @Ri; op arg, Rn
sprintf (op->buf_asm, name, buf[1], buf[0] & mask);
} else if (arg1 == A_BIT) {
// bit addressing mode
sprintf (op->buf_asm, name, arg_bit (buf[1]), buf[1] & 0x07);
} else {
// direct, immediate, bit
sprintf (op->buf_asm, name, buf[1]);
}
} else {
strcpy (op->buf_asm, "truncated");
return -1;
}
break;
case 3:
if (len>2) {
if ((arg1 == A_ADDR16) || (arg1 == A_IMM16)) {
sprintf (op->buf_asm, name, 0x100 * buf[1] + buf[2]);
} else if (arg1 == A_IMM16) {
sprintf (op->buf_asm, name, 0x100 * buf[1] + buf[2]);
} else if (arg2 == A_OFFSET) {
if (mask != A_NONE) {
// @Ri, immediate, offset; Rn, immediate, offset
sprintf (op->buf_asm, name, buf[0] & mask, buf[1], arg_offset (pc + 3, buf[1]));
} else if (arg1 == A_BIT) {
// bit, offset
sprintf (op->buf_asm, name, arg_bit (buf[1]), buf[1] & 0x07, arg_offset (pc + 3, buf[2]));
} else {
// direct, offset; a, immediate, offset
sprintf (op->buf_asm, name, buf[1], arg_offset (pc + 3, buf[2]));
}
} else if (arg3 == A_OFFSET) {
// @Ri/Rn, direct, offset
sprintf (op->buf_asm, name, buf[0] & mask, buf[1], arg_offset (pc + 3, buf[2]));
} else if (arg1 == A_DIRECT && arg2 == A_DIRECT) {
// op direct, direct has src and dest swapped
sprintf (op->buf_asm, name, buf[2], buf[1]);
} else {
// direct, immediate
sprintf (op->buf_asm, name, buf[1], buf[2]);
}
} else {
strcpy (op->buf_asm, "truncated");
return -1;
}
break;
default:
// if we get here something is wrong
return 0;
}
return oplen;
}
// invalid op-code
return 0;
}