def mnemonic_int(operands, errors=None):
opcode = None
opcode_operands = bytearray()
if validate_operands_count(operands, 1, errors):
operand = operands[0].lower()
if data.is_valid_str(operand) or data.is_valid_chr(operand):
if errors is not None:
errors.append({
'name': 'UNSUPPORTED_OPERAND',
'info': [operand]
})
elif validate_operand_data_size(operand, 8, errors):
# call interrupt is supported with max. 8-bit data with a value up to 63 (for 64 interrupts)
opcode = 0b11011111
data_value = data.get_value(operand)
if data_value > 63:
if errors is not None:
errors.append({
'name': 'INVALID_INT',
'info': [data_value]
})
else:
opcode_operands.append(data_value)
if errors:
return None
else:
machine_code = bytearray()
machine_code.append(opcode)
machine_code.extend(opcode_operands)
return {'machine_code': machine_code, 'relocation_table': []}
def read_flags_file(file_name, errors=None):
global current_file_name, current_line_num, current_line_str
if os.path.isfile(file_name):
flags = {}
flags_bits = 0
with open(file_name, 'r') as file:
current_file_name = file_name
line_num = 0
current_line_num = line_num
for line_str in file.readlines():
current_line_str = line_str
line_num += 1
current_line_num = line_num
line_str = line_str.strip()
if line_str:
i = line_str.split(';')
flag_name = i[0].strip()
if is_valid_name(flag_name):
if len(i) > 1:
flag_value = i[1].strip()
if data.is_valid(
flag_value
) and not data.is_valid_str(flag_value):
flag_value = data.get_value(flag_value)
else:
if errors is not None:
errors.append({
'name': 'INVALID_FLAG_VALUE',
'info': [flag_value]
})
return None, None
else:
flag_value = int(math.pow(2, flags_bits))
flags[flag_name] = flag_value
flags_bits = max(flags_bits, flag_value.bit_length())
else:
if errors is not None:
errors.append({
'name': 'INVALID_FLAG_NAME',
'info': [flag_name]
})
return None, None
return flags, flags_bits
else:
if errors is not None:
errors.append({'name': 'FILE_NOT_FOUND', 'info': [file_name]})
return None, None
def mnemonics_add_sub_cmp_adc_sbb_and_or_xor(mnemonic, operands, errors=None):
opcode = None
opcode_operands = bytearray()
if validate_operands_count(operands, 1, errors):
# add (with carry), subtract (with borrow), compare, and, or and xor are supported with M, any 8-bit register or
# max. 8-bit data or a single character but no string
operand = operands[0].lower()
if 'm' == operand:
opcode = 0b110
elif is_valid_register(operand):
if validate_operand_register_size(operand, 8, errors):
register_opcode = get_register_opcode(operand)
opcode = register_opcode
elif data.is_valid_str(operand):
if errors is not None:
errors.append({'name': 'INCOMPATIBLE_DATA_TYPE', 'info': []})
elif validate_operand_data_size(operand, 8, errors):
opcode = 0b111
data_value = data.get_value(operand)
opcode_operands.append(data_value)
if opcode is not None:
if 'add' == mnemonic:
opcode = 0b01100000 | (opcode << 1)
elif 'sub' == mnemonic:
opcode = 0b01100001 | (opcode << 1)
elif 'cmp' == mnemonic:
opcode = 0b01110000 | (opcode << 1)
elif 'adc' == mnemonic:
opcode = 0b01010000 | opcode
elif 'sbb' == mnemonic:
opcode = 0b01011000 | opcode
elif 'and' == mnemonic:
opcode = 0b00110000 | opcode
elif 'or' == mnemonic:
opcode = 0b00111000 | opcode
elif 'xor' == mnemonic:
opcode = 0b01000000 | opcode
if errors:
return None
else:
machine_code = bytearray()
machine_code.append(opcode)
machine_code.extend(opcode_operands)
return {'machine_code': machine_code, 'relocation_table': []}
def mnemonics_db_dw(mnemonic, operands, errors=None):
opcode_operands = bytearray()
_relocation_table = []
if operands:
for operand in operands:
operand_splits = operand.rsplit(None, 3)
if len(operand_splits) == 4 and '(' == operand_splits[
-3] and ')' == operand_splits[-1]:
operand = operand_splits[0]
multiplier = operand_splits[-2]
if data.is_valid_str(multiplier) or data.is_valid_chr(
multiplier):
if errors is not None:
errors.append({
'name': 'UNSUPPORTED_MULTIPLIER',
'info': [multiplier]
})
opcode_operands.clear()
break
elif data.get_size(multiplier) is None or data.get_value(
multiplier) < 1:
if errors is not None:
errors.append({
'name': 'INVALID_MULTIPLIER',
'info': [multiplier]
})
opcode_operands.clear()
break
elif data.get_size(multiplier) > 16:
if errors is not None:
errors.append({
'name': 'UNSUPPORTED_MULTIPLIER_SIZE',
'info': [data.get_size(multiplier), 16]
})
opcode_operands.clear()
break
multiplier_value = data.get_value(multiplier)
else:
multiplier_value = 1
if 'db' == mnemonic:
# bytes support max. 8-bit data, a single character or a string
if validate_operand_data_size(operand, 8, errors):
if data.is_valid_str(operand):
data_values = data.get_value(
operand) * multiplier_value
opcode_operands.extend(data_values)
else:
data_value = data.get_value(operand)
opcode_operands.extend([data_value] * multiplier_value)
else:
opcode_operands.clear()
break
elif 'dw' == mnemonic:
# words support a symbol name (using relocation), max. 16-bit data, a single character or a string both
# including unicode
if is_valid_name(operand):
operand = expand_local_symbol_name(operand)
opcode_operands.extend([0, 0])
_relocation_table.append({
'machine_code_offset':
len(opcode_operands) - 2,
'symbol_index':
symbol_table.get_index(operand)
})
elif validate_operand_data_size(operand, 16, errors):
if data.is_valid_str(operand):
data_values = data.get_value(
operand) * multiplier_value
for data_value in data_values:
opcode_operands.extend(
binutils.word_to_le(data_value))
else:
data_value = data.get_value(operand)
opcode_operands.extend(
binutils.word_to_le(data_value) * multiplier_value)
else:
opcode_operands.clear()
break
else:
if errors is not None:
errors.append({'name': 'NO_DATA', 'info': []})
if errors:
return None
else:
machine_code = bytearray()
machine_code.extend(opcode_operands)
return {
'machine_code': machine_code,
'relocation_table': _relocation_table
}
def mnemonic_mov(operands, errors=None):
opcode = None
opcode_operands = bytearray()
_relocation_table = []
if validate_operands_count(operands, 2, errors):
operand1 = operands[0].lower()
operand2 = operands[1].lower()
if 'm' == operand1:
# move into M is only supported from an 8-bit register
register1_opcode = 0b110
if validate_operand_register_size(operand2, 8, errors):
register2_opcode = get_register_opcode(operand2)
opcode = 0b10000000 | (register1_opcode << 4) | (
register2_opcode << 1)
elif validate_operand_register(operand1, errors):
register1_size = get_register_size(operand1)
register1_opcode = get_register_opcode(operand1)
if 8 == register1_size:
# move into an 8-bit register is supported from M, another 8-bit register or using max. 8-bit data or a
# single character but no string
register2_opcode = None
if 'm' == operand2:
register2_opcode = 0b110
elif is_valid_register(operand2):
if validate_operand_register_size(operand2, register1_size,
errors):
register2_opcode = get_register_opcode(operand2)
elif data.is_valid_str(operand2):
if errors is not None:
errors.append({
'name': 'INCOMPATIBLE_DATA_TYPE',
'info': []
})
elif validate_operand_data_size(operand2, register1_size,
errors):
register2_opcode = 0b111
data_value = data.get_value(operand2)
opcode_operands.append(data_value)
if register2_opcode is not None:
opcode = 0b10000000 | (register1_opcode << 4) | (
register2_opcode << 1)
elif 16 == register1_size:
# move into a 16-bit register is supported from a symbol name (using relocation), another 16-bit
# register or using max. 16-bit data or a single character including unicode but no string
register2_opcode = None
if is_valid_name(operand2):
operand2 = expand_local_symbol_name(operand2)
register2_opcode = 0b111
opcode_operands.extend([0, 0])
_relocation_table.append({
'machine_code_offset':
1,
'symbol_index':
symbol_table.get_index(operand2)
})
elif is_valid_register(operand2):
if validate_operand_register_size(operand2, register1_size,
errors):
register2_opcode = get_register_opcode(operand2)
elif data.is_valid_str(operand2):
errors.append({
'name': 'INCOMPATIBLE_DATA_TYPE',
'info': []
})
elif validate_operand_data_size(operand2, register1_size,
errors):
register2_opcode = 0b111
data_value = data.get_value(operand2)
opcode_operands.extend(binutils.word_to_le(data_value))
if register2_opcode is not None:
opcode = (register1_opcode << 4) | (register2_opcode << 1)
if errors:
return None
else:
machine_code = bytearray()
machine_code.append(opcode)
machine_code.extend(opcode_operands)
return {
'machine_code': machine_code,
'relocation_table': _relocation_table
}
def is_valid_addr(s):
# a symbol name is always a valid address (the linker will determine the address during relocation)
return is_valid_name(s) or (data.is_valid(s) and not data.is_valid_chr(s)
and not data.is_valid_str(s))
def parse_csv_line(line_str, errors=None):
columns = line_str.split(';')
addr_value = ''
data_value = ''
for column, bits in addr_config.items():
if column <= len(columns):
column_value = columns[column - 1].strip()
if data.is_valid(
column_value) and not data.is_valid_str(column_value):
column_value = format(data.get_value(column_value), 'b')
if bits is not None:
column_value = column_value.zfill(bits)
elif is_valid_bits(column_value):
column_value = get_bits_value(column_value)
if bits is not None:
column_value = column_value.zfill(bits)
else:
if errors is not None:
errors.append({
'name': 'INVALID_ADDR_VALUE',
'info': [column_value]
})
return None, None
addr_value += column_value
else:
if errors is not None:
errors.append({
'name': 'ADDR_COLUMN_NOT_FOUND',
'info': [column]
})
return None, None
if addr_config_bits is not None and len(addr_value) > addr_config_bits:
if errors is not None:
errors.append({
'name': 'INCOMPATIBLE_ADDR_SIZE',
'info': [len(addr_value), addr_config_bits]
})
return None, None
if data_config_column <= len(columns):
column_value = columns[data_config_column - 1].strip()
if data.is_valid(column_value) and not data.is_valid_str(column_value):
column_value = format(data.get_value(column_value), 'b')
if data_config_bits is not None:
column_value = column_value.zfill(data_config_bits)
elif data_config_flags:
flag_names = column_value.split(',')
column_value = 0
for flag_name in flag_names:
flag_name = flag_name.strip()
if flag_exists(flag_name):
column_value |= get_flag_value(flag_name)
else:
if errors is not None:
errors.append({
'name': 'UNKNOWN_FLAG',
'info': [flag_name]
})
return None, None
column_value = format(column_value, 'b').zfill(data_config_bits)
else:
if errors is not None:
errors.append({
'name': 'INVALID_DATA_VALUE',
'info': [column_value]
})
return None, None
data_value = column_value
else:
if errors is not None:
errors.append({
'name': 'DATA_COLUMN_NOT_FOUND',
'info': [data_config_column]
})
return None, None
if data_config_bits is not None and len(data_value) > data_config_bits:
if errors is not None:
errors.append({
'name': 'INCOMPATIBLE_DATA_SIZE',
'info': [len(data_value), data_config_bits]
})
return None, None
return addr_value, data_value
def parse_zero_fill(zero_fill_str):
if data.is_valid(zero_fill_str) and not data.is_valid_str(zero_fill_str):
return data.get_value(zero_fill_str)
else:
show_error({'name': 'INVALID_ZERO_FILL', 'info': [zero_fill_str]})
return None