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circuitpython/tools/analyze_mpy.py

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import sys
import binascii
import io
bytecode_format_sizes = {
"MP_OPCODE_BYTE": 1,
"MP_OPCODE_QSTR": 3,
"MP_OPCODE_VAR_UINT": None, # Unknown because uint encoding uses the top bit to indicate the end.
"MP_OPCODE_OFFSET": 3,
"MP_OPCODE_BYTE_EXTRA": 2,
"MP_OPCODE_VAR_UINT_EXTRA": None,
"MP_OPCODE_OFFSET_EXTRA": 4
}
bytecodes = {
0x00: {"name": "MP_BC_LOAD_FAST_MULTI",
"format": "MP_OPCODE_BYTE"},
0x10: {"name": "MP_BC_LOAD_CONST_FALSE",
"format": "MP_OPCODE_BYTE"},
0x11: {"name": "MP_BC_LOAD_CONST_NONE",
"format": "MP_OPCODE_BYTE"},
0x12: {"name": "MP_BC_LOAD_CONST_TRUE",
"format": "MP_OPCODE_BYTE"},
0x14: {"name": "MP_BC_LOAD_CONST_SMALL_INT",
"format": "MP_OPCODE_VAR_UINT"},
0x16: {"name": "MP_BC_LOAD_CONST_STRING",
"format": "MP_OPCODE_QSTR"},
0x17: {"name": "MP_BC_LOAD_CONST_OBJ",
"format": "MP_OPCODE_VAR_UINT"},
#define MP_BC_LOAD_CONST_OBJ (0x17) // ptr
0x18: {"name": "MP_BC_LOAD_NULL",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_LOAD_FAST_N (0x19) // uint
0x1a: {"name": "MP_BC_LOAD_DEREF",
"format": "MP_OPCODE_VAR_UINT"},
0x1b: {"name": "MP_BC_LOAD_NAME",
"format": "MP_OPCODE_QSTR"},
0x1c: {"name": "MP_BC_LOAD_GLOBAL",
"format": "MP_OPCODE_QSTR"},
0x1d: {"name": "MP_BC_LOAD_ATTR",
"format": "MP_OPCODE_QSTR"},
0x1e: {"name": "MP_BC_LOAD_METHOD",
"format": "MP_OPCODE_QSTR"},
0x1f: {"name": "MP_BC_LOAD_SUPER_METHOD",
"format": "MP_OPCODE_QSTR"},
0x20: {"name": "MP_BC_LOAD_BUILD_CLASS",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_LOAD_BUILD_CLASS (0x20)
#define MP_BC_LOAD_SUBSCR (0x21)
0x21: {"name": "MP_BC_LOAD_SUBSCR",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_STORE_FAST_N (0x22) // uint
#define MP_BC_STORE_DEREF (0x23) // uint
#define MP_BC_STORE_NAME (0x24) // qstr
0x24: {"name": "MP_BC_STORE_NAME",
"format": "MP_OPCODE_QSTR"},
0x25: {"name": "MP_BC_STORE_GLOBAL",
"format": "MP_OPCODE_QSTR"},
0x26: {"name": "MP_BC_STORE_ATTR",
"format": "MP_OPCODE_QSTR"},
0x27: {"name": "MP_BC_LOAD_SUBSCR",
"format": "MP_OPCODE_BYTE"},
0x28: {"name": "MP_BC_DELETE_FAST",
"format": "MP_OPCODE_VAR_UINT"},
#define MP_BC_DELETE_FAST (0x28) // uint
#define MP_BC_DELETE_DEREF (0x29) // uint
#define MP_BC_DELETE_NAME (0x2a) // qstr
#define MP_BC_DELETE_GLOBAL (0x2b) // qstr
0x30: {"name": "MP_BC_DUP_TOP",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_DUP_TOP_TWO (0x31)
0x32: {"name": "MP_BC_POP_TOP",
"format": "MP_OPCODE_BYTE"},
0x33: {"name": "MP_BC_ROT_TWO",
"format": "MP_OPCODE_BYTE"},
0x34: {"name": "MP_BC_ROT_THREE",
"format": "MP_OPCODE_BYTE"},
0x35: {"name": "MP_BC_JUMP",
"format": "MP_OPCODE_OFFSET"},
0x36: {"name": "MP_BC_POP_JUMP_IF_TRUE",
"format": "MP_OPCODE_OFFSET"},
0x37: {"name": "MP_BC_POP_JUMP_IF_FALSE",
"format": "MP_OPCODE_OFFSET"},
#define MP_BC_JUMP_IF_TRUE_OR_POP (0x38) // rel byte code offset, 16-bit signed, in excess
#define MP_BC_JUMP_IF_FALSE_OR_POP (0x39) // rel byte code offset, 16-bit signed, in excess
#define MP_BC_SETUP_WITH (0x3d) // rel byte code offset, 16-bit unsigned
#define MP_BC_WITH_CLEANUP (0x3e)
#define MP_BC_SETUP_EXCEPT (0x3f) // rel byte code offset, 16-bit unsigned
#define MP_BC_SETUP_FINALLY (0x40) // rel byte code offset, 16-bit unsigned
#define MP_BC_END_FINALLY (0x41)
#define MP_BC_GET_ITER (0x42)
#define MP_BC_FOR_ITER (0x43) // rel byte code offset, 16-bit unsigned
0x43: {"name": "MP_BC_FOR_ITER",
"format": "MP_OPCODE_OFFSET"},
0x44: {"name": "MP_BC_POP_BLOCK",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_POP_EXCEPT (0x45)
#define MP_BC_UNWIND_JUMP (0x46) // rel byte code offset, 16-bit signed, in excess; then a byte
0x47: {"name": "MP_BC_GET_ITER_STACK",
"format": "MP_OPCODE_BYTE"},
0x50: {"name": "MP_BC_BUILD_TUPLE",
"format": "MP_OPCODE_VAR_UINT"},
0x51: {"name": "MP_BC_BUILD_LIST",
"format": "MP_OPCODE_VAR_UINT"},
0x53: {"name": "MP_BC_BUILD_MAP",
"format": "MP_OPCODE_VAR_UINT"},
0x54: {"name": "MP_BC_STORE_MAP",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_BUILD_SET (0x56) // uint
#define MP_BC_BUILD_SLICE (0x58) // uint
#define MP_BC_STORE_COMP (0x57) // uint
0x57: {"name": "MP_BC_STORE_COMP",
"format": "MP_OPCODE_VAR_UINT"},
#define MP_BC_UNPACK_SEQUENCE (0x59) // uint
#define MP_BC_UNPACK_EX (0x5a) // uint
0x5b: {"name": "MP_BC_RETURN_VALUE",
"format": "MP_OPCODE_BYTE"},
0x5c: {"name": "MP_BC_RAISE_VARARGS",
"format": "MP_OPCODE_BYTE_EXTRA"},
#define MP_BC_YIELD_VALUE (0x5d)
#define MP_BC_YIELD_FROM (0x5e)
#define MP_BC_MAKE_FUNCTION (0x60) // uint
0x60: {"name": "MP_BC_MAKE_FUNCTION",
"format": "MP_OPCODE_VAR_UINT"},
0x61: {"name": "MP_BC_MAKE_FUNCTION_DEFARGS",
"format": "MP_OPCODE_VAR_UINT"},
0x62: {"name": "MP_BC_MAKE_CLOSURE",
"format": "MP_OPCODE_VAR_UINT_EXTRA"},
0x63: {"name": "MP_BC_MAKE_CLOSURE",
"format": "MP_OPCODE_VAR_UINT_EXTRA"},
0x64: {"name": "MP_BC_CALL_FUNCTION",
"format": "MP_OPCODE_VAR_UINT"},
0x65: {"name": "MP_BC_CALL_FUNCTION_VAR_KW",
"format": "MP_OPCODE_VAR_UINT"},
0x66: {"name": "MP_BC_CALL_METHOD",
"format": "MP_OPCODE_VAR_UINT"},
0x67: {"name": "MP_BC_CALL_METHOD_VAR_KW",
"format": "MP_OPCODE_VAR_UINT"},
0x68: {"name": "MP_BC_IMPORT_NAME",
"format": "MP_OPCODE_QSTR"},
0x69: {"name": "MP_BC_IMPORT_FROM",
"format": "MP_OPCODE_QSTR"},
#define MP_BC_IMPORT_FROM (0x69) // qstr
#define MP_BC_IMPORT_STAR (0x6a)
#define MP_BC_LOAD_CONST_SMALL_INT_MULTI (0x70) // + N(64)
0x7f: {"name": "MP_BC_LOAD_CONST_SMALL_INT_MULTI -1",
"format": "MP_OPCODE_BYTE"},
0x80: {"name": "MP_BC_LOAD_CONST_SMALL_INT_MULTI 0",
"format": "MP_OPCODE_BYTE"},
0x81: {"name": "MP_BC_LOAD_CONST_SMALL_INT_MULTI 1",
"format": "MP_OPCODE_BYTE"},
0x82: {"name": "MP_BC_LOAD_CONST_SMALL_INT_MULTI 2",
"format": "MP_OPCODE_BYTE"},
0x83: {"name": "MP_BC_LOAD_CONST_SMALL_INT_MULTI 3",
"format": "MP_OPCODE_BYTE"},
0x84: {"name": "MP_BC_LOAD_CONST_SMALL_INT_MULTI 4",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_LOAD_FAST_MULTI (0xb0) // + N(16)
0xb0: {"name": "MP_BC_LOAD_FAST_MULTI 0",
"format": "MP_OPCODE_BYTE"},
0xb1: {"name": "MP_BC_LOAD_FAST_MULTI 1",
"format": "MP_OPCODE_BYTE"},
0xb2: {"name": "MP_BC_LOAD_FAST_MULTI 2",
"format": "MP_OPCODE_BYTE"},
0xb3: {"name": "MP_BC_LOAD_FAST_MULTI 3",
"format": "MP_OPCODE_BYTE"},
0xb4: {"name": "MP_BC_LOAD_FAST_MULTI 4",
"format": "MP_OPCODE_BYTE"},
0xb5: {"name": "MP_BC_LOAD_FAST_MULTI 5",
"format": "MP_OPCODE_BYTE"},
0xb6: {"name": "MP_BC_LOAD_FAST_MULTI 6",
"format": "MP_OPCODE_BYTE"},
0xb7: {"name": "MP_BC_LOAD_FAST_MULTI 7",
"format": "MP_OPCODE_BYTE"},
0xb8: {"name": "MP_BC_LOAD_FAST_MULTI 8",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_STORE_FAST_MULTI (0xc0) // + N(16)
0xc0: {"name": "MP_BC_STORE_FAST_MULTI 0",
"format": "MP_OPCODE_BYTE"},
0xc1: {"name": "MP_BC_STORE_FAST_MULTI 1",
"format": "MP_OPCODE_BYTE"},
0xc2: {"name": "MP_BC_STORE_FAST_MULTI 2",
"format": "MP_OPCODE_BYTE"},
0xc3: {"name": "MP_BC_STORE_FAST_MULTI 3",
"format": "MP_OPCODE_BYTE"},
0xc4: {"name": "MP_BC_STORE_FAST_MULTI 4",
"format": "MP_OPCODE_BYTE"},
0xc5: {"name": "MP_BC_STORE_FAST_MULTI 5",
"format": "MP_OPCODE_BYTE"},
0xc6: {"name": "MP_BC_STORE_FAST_MULTI 6",
"format": "MP_OPCODE_BYTE"},
0xc7: {"name": "MP_BC_STORE_FAST_MULTI 7",
"format": "MP_OPCODE_BYTE"},
#define MP_BC_UNARY_OP_MULTI (0xd0) // + op(<MP_UNARY_OP_NUM_BYTECODE)
# // 9 relational operations, should return a bool
0xd7: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_LESS",
"format": "MP_OPCODE_BYTE"},
0xd8: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_MORE",
"format": "MP_OPCODE_BYTE"},
0xd9: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_EQUAL",
"format": "MP_OPCODE_BYTE"},
0xda: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_LESS_EQUAL",
"format": "MP_OPCODE_BYTE"},
0xdb: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_MORE_EQUAL",
"format": "MP_OPCODE_BYTE"},
0xdc: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_NOT_EQUAL",
"format": "MP_OPCODE_BYTE"},
# dc: MP_BINARY_OP_NOT_EQUAL,
# dd: MP_BINARY_OP_IN,
# de: MP_BINARY_OP_IS,
# df: MP_BINARY_OP_EXCEPTION_MATCH,
#
# // 12 inplace arithmetic operations
# e0: MP_BINARY_OP_INPLACE_OR,
# e1: MP_BINARY_OP_INPLACE_XOR,
# e2: MP_BINARY_OP_INPLACE_AND,
# e3: MP_BINARY_OP_INPLACE_LSHIFT,
# e4: MP_BINARY_OP_INPLACE_RSHIFT,
# e5: MP_BINARY_OP_INPLACE_ADD,
0xe5: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_INPLACE_ADD",
"format": "MP_OPCODE_BYTE"},
0xe6: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_INPLACE_SUBTRACT",
"format": "MP_OPCODE_BYTE"},
# e7: MP_BINARY_OP_INPLACE_MULTIPLY,
# e8: MP_BINARY_OP_INPLACE_FLOOR_DIVIDE,
# e9: MP_BINARY_OP_INPLACE_TRUE_DIVIDE,
# ea: MP_BINARY_OP_INPLACE_MODULO,
# eb: MP_BINARY_OP_INPLACE_POWER,
#
# // 12 normal arithmetic operations
# ec: MP_BINARY_OP_OR,
# ed: MP_BINARY_OP_XOR,
# ee: MP_BINARY_OP_AND,
# ef: MP_BINARY_OP_LSHIFT,
# f0: MP_BINARY_OP_RSHIFT,
#define MP_BC_BINARY_OP_MULTI (0xd7) // + op(<MP_BINARY_OP_NUM_BYTECODE)
0xf1: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_ADD",
"format": "MP_OPCODE_BYTE"},
0xf2: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_SUBTRACT",
"format": "MP_OPCODE_BYTE"},
0xf3: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_MULTIPLY",
"format": "MP_OPCODE_BYTE"},
0xf4: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_FLOOR_DIVIDE",
"format": "MP_OPCODE_BYTE"},
0xf5: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_TRUE_DIVIDE",
"format": "MP_OPCODE_BYTE"},
0xf6: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_MODULO",
"format": "MP_OPCODE_BYTE"},
0xf7: {"name": "MP_BC_BINARY_OP_MULTI MP_BINARY_OP_POWER",
"format": "MP_OPCODE_BYTE"},
}
def read_uint(encoded_uint, peek=False):
unum = 0
i = 0
while True:
if peek:
b = encoded_uint.peek()[i]
else:
b = encoded_uint.read(1)[0]
unum = (unum << 7) | (b & 0x7f)
if (b & 0x80) == 0:
break
i += 1
return unum
class Prelude:
def __init__(self, encoded_prelude):
self.n_state = read_uint(encoded_prelude)
self.n_exc_stack = read_uint(encoded_prelude)
self.scope_flags = encoded_prelude.read(1)[0]
self.n_pos_args = encoded_prelude.read(1)[0]
self.n_kwonly_args = encoded_prelude.read(1)[0]
self.n_def_pos_args = encoded_prelude.read(1)[0]
self.code_info_size = read_uint(encoded_prelude, peek=True)
class RawCode:
# mp_raw_code_kind_t kind : 3;
# mp_uint_t scope_flags : 7;
# mp_uint_t n_pos_args : 11;
# union {
# struct {
# const byte *bytecode;
# const mp_uint_t *const_table;
# #if MICROPY_PERSISTENT_CODE_SAVE
# mp_uint_t bc_len;
# uint16_t n_obj;
# uint16_t n_raw_code;
# #endif
# } u_byte;
# struct {
# void *fun_data;
# const mp_uint_t *const_table;
# mp_uint_t type_sig; // for viper, compressed as 2-bit types; ret is MSB, then arg0, arg1, etc
# } u_native;
# } data;
def __init__(self, encoded_raw_code):
bc_len = read_uint(encoded_raw_code)
bc = encoded_raw_code.read(bc_len)
bc = io.BufferedReader(io.BytesIO(bc))
prelude = Prelude(bc)
encoded_code_info = bc.read(prelude.code_info_size)
bc.read(1)
while bc.peek(1)[0] == 0xff:
bc.read(1)
bc = bytearray(bc.read())
#print(encoded_code_info, bc)
self.qstrs = []
self.simple_name = self._load_qstr(encoded_raw_code)
self.source_file = self._load_qstr(encoded_raw_code)
# the simple name and source file qstr indexes get written back into the byte code somehow
#print(bc)
self._load_bytecode_qstrs(encoded_raw_code, bc)
#print(encoded_raw_code.peek(20)[:20])
n_obj = read_uint(encoded_raw_code)
n_raw_code = read_uint(encoded_raw_code)
self.const_table = []
for i in range(prelude.n_pos_args + prelude.n_kwonly_args):
self.const_table.append(self._load_qstr(encoded_raw_code))
print("load args", self.const_table[-1])
for i in range(n_obj):
self.const_table.append(self._load_obj(encoded_raw_code))
print("load obj", self.const_table[-1])
for i in range(n_raw_code):
print("load raw code")
self.const_table.append(RawCode(encoded_raw_code))
print(self.qstrs[self.simple_name], self.qstrs[self.source_file])
#print(binascii.hexlify(encoded_raw_code.peek(20)[:20]))
def _load_qstr(self, encoded_qstr):
string_len = read_uint(encoded_qstr)
string = encoded_qstr.read(string_len).decode("utf-8")
print(string)
if string in self.qstrs:
return self.qstrs.index(string)
new_index = len(self.qstrs)
self.qstrs.append(string)
return new_index
def _load_obj(self, encoded_obj):
obj_type = encoded_obj.read(1)
if obj_type == b'e':
return "..."
else:
str_len = read_uint(encoded_obj)
s = encoded_obj.read(str_len)
if obj_type == b's':
return s.decode("utf-8")
elif obj_type == b'b':
return s
elif obj_type == b'i':
return int(s)
elif obj_type == b'f':
return float(s)
elif obj_type == b'c':
return float(s)
raise RuntimeError("Unknown object type {}".format(obj_type))
def _load_bytecode_qstrs(self, encoded_raw_code, bytecode):
i = 0
while i < len(bytecode):
bc = bytecode[i]
if bc not in bytecodes:
raise RuntimeError("missing code 0x{:x} at {}".format(bc, i))
return
bc = bytecodes[bc]
opcode = bc["name"]
print(opcode)
opcode_size = bytecode_format_sizes[bc["format"]]
if bc["format"] == "MP_OPCODE_QSTR":
qstr_index = self._load_qstr(encoded_raw_code)
bytecode[i+1] = qstr_index
bytecode[i+2] = qstr_index >> 8
if not opcode_size:
i += 2
while (bytecode[i] & 0x80) != 0:
i += 1
if bc["format"] == "MP_OPCODE_VAR_UINT_EXTRA":
i += 1
else:
i += opcode_size
class mpyFile:
def __init__(self, encoded_mpy):
# this matches mp-raw_code_save in py/persistentcode.c
first_byte = encoded_mpy.read(1)
if first_byte != b'M':
raise ValueError("Not a valid first byte. Should be 'M' but is {}".format(first_byte))
self.version = encoded_mpy.read(1)[0]
self.feature_flags = encoded_mpy.read(1)[0]
self.small_int_bits = encoded_mpy.read(1)[0]
self.raw_code = RawCode(encoded_mpy)
if __name__ == "__main__":
with open(sys.argv[1], "rb") as f:
mpy = mpyFile(f)
print(mpy.version)
print(mpy.feature_flags)
print(mpy.small_int_bits)