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argparser.py
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from __future__ import print_function
import argparse
import sys
import re
from enum import Enum
__DBG__ = True
class Colors:
purple = '\033[95m'
blue = '\033[94m'
green = '\033[92m'
yellow = '\033[93m'
red = '\033[91m'
grey = '\033[1;37m'
darkgrey = '\033[1;30m'
cyan = '\033[1;36m'
ENDC = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
class TypeType(Enum):
none = 1
lebu = 2
lebs = 3
flot = 4
dobl = 5
TypeKS = [['uint8', 8, TypeType.none], ['uint16', 16, TypeType.none],
['uint32', 32, TypeType.none], ['uint64', 64, TypeType.none],
['varuint1', 1, TypeType.lebu], ['varuint7', 7, TypeType.lebu],
['varuint32', 32, TypeType.lebu], ['varuint64', 64, TypeType.lebu],
['varint1', 1, TypeType.lebs], ['varint7', 7, TypeType.lebs],
['varint32', 32, TypeType.lebs], ['varint64', 64, TypeType.lebs]]
class WASM_OP_Code:
magic_number = 0x6d736100
version_number = 0x01
uint8 = 1
uint16 = 2
uint32 = 4
uint64 = 8
varuint1 = 1
varuint7 = 1
varuint32 = 4
varuint64 = 8
varint1 = 1
varint7 = 1
varint32 = 4
varint64 = 8
all_ops = [('i32', '7f', False), ('i64', '7e', False), ('f32', '7d', False),
('f63', '7c', False), ('anyfunc', '7b', False),
('func', '60', False), ('empty_block_type', '40', False),
('unreachable', '00', False), ('nop', '01', False),
('block', '02', True, (varuint7)),
('loop', '03', True, (varuint7)),
('if', '04', True, (varuint7)), ('else', '05', False),
('end', '0b', False), ('br', '0c', True, (varuint32)),
('br_if', '0d', True, varuint32),
('br_table', '0e', True, (varuint32, varuint32, varuint32)),
('return', '0f', False), ('call', '10', True, (varuint32)),
('call_indirect', '11', True, (varuint32, varuint1)),
('drop', '1a', False), ('select', '1b', False),
('get_local', '20', True, (varuint32)),
('set_local', '21', True, (varuint32)),
('tee_local', '22', True, (varuint32)),
('get_global', '23', True, (varuint32)),
('set_global', '24', True, (varuint32)),
('i32.load', '28', True, (varuint32, varuint32)),
('i64.load', '29', True, (varuint32, varuint32)),
('f32.load', '2a', True, (varuint32, varuint32)),
('f64.load', '2b', True, (varuint32, varuint32)),
('i32.load8_s', '2c', True, (varuint32, varuint32)),
('i32.load8_u', '2d', True, (varuint32, varuint32)),
('i32.load16_s', '2e', True, (varuint32, varuint32)),
('i32.load16_u', '2f', True, (varuint32, varuint32)),
('i64.load8_s', '30', True, (varuint32, varuint32)),
('i64.load8_u', '31', True, (varuint32, varuint32)),
('i64.load16_s', '32', True, (varuint32, varuint32)),
('i64.load16_u', '33', True, (varuint32, varuint32)),
('i64.load32_s', '34', True, (varuint32, varuint32)),
('i64.load32_u', '35', True, (varuint32, varuint32)),
('i32.store', '36', True, (varuint32, varuint32)),
('i64.store', '37', True, (varuint32, varuint32)),
('f32.store', '38', True, (varuint32, varuint32)),
('f64.store', '39', True, (varuint32, varuint32)),
('i32.store8', '3a', True, (varuint32, varuint32)),
('i32.store16', '3b', True, (varuint32, varuint32)),
('i64.store8', '3c', True, (varuint32, varuint32)),
('i64.store16', '3d', True, (varuint32, varuint32)),
('i64.store32', '3e', True, (varuint32, varuint32)),
('current_memory', '3f', True, (varuint1)),
('grow_memory', '40', True, (varuint1)),
('i32.const', '41', True, (varint32)),
('i64.const', '42', True, (varint64)),
('f32.const', '43', True, (uint32)),
('f64', '44', True, (uint64)),
('i32.eqz', '45', False), ('i32.eq', '46', False),
('i32.ne', '47', False), ('i32.lt_s', '48', False),
('i31.lt_u', '49', False), ('i32.gt_s', '4a', False),
('i32.gt_u', '4b', False), ('i32.le_s', '4c', False),
('i32.le_u', '4d', False), ('i32.ge_s', '4e', False),
('i32.ge_u', '4f', False), ('i64.eqz', '50', False),
('i64.eq', '51', False), ('i64.ne', '52', False),
('i64.lt_s', '53', False), ('i64.lt_u', '54', False),
('i64.gt_s', '55', False), ('i64.gt_u', '56', False),
('i64.le_s', '57', False), ('i64.le_u', '58', False),
('i64.ge_s', '59', False), ('i64.ge_u', '5a', False),
('f32.eq', '5b', False), ('f32.ne', '5c', False),
('f32.lt', '5d', False), ('f32.gt', '5e', False),
('f32.le', '5f', False), ('f32.ge', '60', False),
('f64.eq', '61', False), ('f64.ne', '62', False),
('f64.lt', '63', False), ('f64.gt', '64', False),
('f64.le', '65', False), ('f64.ge', '66', False),
('i32.clz', '67', False), ('i31.ctz', '68', False),
('i32.popcnt', '69', False), ('i32.add', '6a', False),
('i32.sub', '6b', False), ('i32.mul', '6c', False),
('i32.div_s', '6d', False), ('i32.div_u', '6e', False),
('i32.rem_s', '6f', False), ('i32.rem_u', '70', False),
('i32.and', '71', False), ('i32.or', '72', False),
('i32.xor', '73', False), ('i32.shl', '74', False),
('i32.shr_s', '75', False), ('i32.shr_u', '76', False),
('i32.rotl', '77', False), ('i32.rotr', '78', False),
('i64.clz', '79', False), ('i64.ctz', '7a', False),
('i64.popcnt', '7b', False), ('i64.add', '7c', False),
('i64.sub', '7d', False), ('i64.mul', '7e', False),
('i64.div_s', '7f', False), ('i64.div_u', '80', False),
('i64.rem_s', '81', False), ('i64.rem_u', '82', False),
('i64.and', '83', False), ('i64.or', '84', False),
('i64.xor', '85', False), ('i64.shl', '86', False),
('i64.shr_s', '87', False), ('i64.shr_u', '88', False),
('i64.rotl', '89', False), ('i63.rotr', '8a', False),
('f32.abs', '8b', False), ('f32.neg', '8c', False),
('f32.ceil', '8d', False), ('f32.floor', '8e', False),
('f32.trunc', '8f', False), ('f32.nearest', '90', False),
('f32.sqrt', '91', False), ('f32.add', '92', False),
('f32.sub', '93', False), ('f32.mul', '94', False),
('f32.div', '95', False), ('f32.min', '96', False),
('f32.max', '97', False), ('f32.copysign', '98', False),
('f64.abs', '99', False), ('f64.neg', '9a', False),
('f64.ceil', '9b', False), ('f64.floor', '9c', False),
('f64.trunc', '9d', False), ('f64.nearest', '9e', False),
('f64.sqrt', '9f', False), ('f64.add', 'a0', False),
('f64.sub', 'a1', False), ('f64.mul', 'a2', False),
('f64.div', 'a3', False), ('f64.min', 'a4', False),
('f64.max', 'a5', False), ('f64.copysign', 'a6', False),
('i32.wrap/i64', 'a7', False), ('i32.trunc_s/f32', 'a8', False),
('i32.trunc_u/f32', 'a9', False),
('i32.trunc_s/f64', 'aa', False),
('i32.trunc_u/f64', 'ab', False),
('i64.extend_s/i32', 'ac', False),
('i64.extend_u/i32', 'ad', False),
('i64.trunc_s/f32', 'ae', False),
('i64.trunc_u/f32', 'af', False),
('i64.trunc_s/f64', 'b0', False),
('i64.trunc_u/f64', 'b1', False),
('f32.convert_s/i32', 'b2', False),
('f32.convert_u/i32', 'b3', False),
('f32.convert_s/i64', 'b4', False),
('f32.convert_u/i64', 'b5', False),
('f32.demote/f64', 'b6', False),
('f64.convert_s/i32', 'b7', False),
('f64.convert_u/i32', 'b8', False),
('f64.convert_s/i64', 'b9', False),
('f64.convert_u/i64', 'ba', False),
('f64.promote/f32', 'bb', False),
('i32.reinterpret/f32', 'bc', False),
('i64.reinterpret/f64', 'bd', False),
('f32.reinterpret/i32', 'be', False),
('f64.reinterpret/i64', 'bf', False)]
type_ops = [('i32', '7f'), ('i64', '7e'), ('f32', '7d'),
('f64', '7c'), ('anyfunc', '7b'), ('func', '60'),
('empty_block_type', '40')]
type_ops_dict = dict(type_ops)
type_ops_dict_rev = {v: k for k, v in type_ops_dict.items()}
control_flow_ops = [('unreachable', '00'), ('nop', '01'),
('block', '02'), ('loop', '03'),
('if', '04'), ('else', '05'),
('end', '0b'), ('br', '0c'),
('br_if', '0d'), ('br_table', '0e'),
('return', '0f')]
control_flow_ops_dict = dict(control_flow_ops)
control_flow_ops_dict_rev = {v: k for k, v in control_flow_ops_dict.items()}
call_ops = [('call', '10'), ('call_indirect', '11')]
call_ops_dict = dict(call_ops)
call_ops_dict_rev = {v: k for k, v in call_ops_dict.items()}
param_ops = [('drop', '1a'), ('select', '1b')]
param_ops_dict = dict(param_ops)
param_ops_dict_rev = {v: k for k, v in param_ops_dict.items()}
var_access = [('get_local', '20'), ('set_local', '21'),
('tee_local', '22'), ('get_global', '23'),
('set_global', '24')]
var_access_dict = dict(var_access)
var_access_dict_rev = {v: k for k, v in var_access_dict.items()}
mem_ops = [('i32.load', '28'), ('i64.load', '29'),
('f32.load', '2a'), ('f64.load', '2b'),
('i32.load8_s', '2c'), ('i32.load8_u', '2d'),
('i32.load16_s', '2e'), ('i32.load16_u', '2f'),
('i64.load8_s', '30'), ('i64.load8_u', '31'),
('i64.load16_s', '32'), ('i64.load16_u', '33'),
('i64.load32_s', '34'), ('i64.load32_u', '35'),
('i32.store', '36'), ('i64.store', '37'),
('f32.store', '38'), ('f64.store', '39'),
('i32.store8', '3a'), ('i32.store16', '3b'),
('i64.store8', '3c'), ('i64.store16', '3d'),
('i64.store32', '3e'), ('current_memory', '3f'),
('grow_memory', '40')]
mem_ops_dict = dict(mem_ops)
mem_ops_dict_rev = {v: k for k, v in mem_ops_dict.items()}
consts = [('i32.const', '41'), ('i64.const', '42'),
('f32.const', '43'), ('f64', '44')]
consts_dict = dict(consts)
consts_dict_rev = {v: k for k, v in consts_dict.items()}
comp_ops = [('i32.eqz', '45'), ('i32.eq', '46'), ('i32.ne', '47'),
('i32.lt_s', '48'), ('i32.lt_u', '49'),
('i32.gt_s', '4a'), ('i32.gt_u', '4b'),
('i32.le_s', '4c'), ('i32.le_u', '4d'),
('i32.ge_s', '4e'), ('i32.ge_u', '4f'),
('i64.eqz', '50'), ('i64.eq', '51'),
('i64.ne', '52'), ('i64.lt_s', '53'),
('i64.lt_u', '54'), ('i64.gt_s', '55'),
('i64.gt_u', '56'), ('i64.le_s', '57'),
('i64.le_u', '58'), ('i64.ge_s', '59'),
('i64.ge_u', '5a'), ('f32.eq', '5b'),
('f32.ne', '5c'), ('f32.lt', '5d'),
('f32.gt', '5e'), ('f32.le', '5f'),
('f32.ge', '60'), ('f64.eq', '61'),
('f64.ne', '62'), ('f64.lt', '63'),
('f64.gt', '64'), ('f64.le', '65'),
('f64.ge', '66')]
comp_ops_dict = dict(comp_ops)
comp_ops_dict_rev = {v: k for k, v in comp_ops_dict.items()}
num_ops = [('i32.clz', '67'), ('i32.ctz', '68'),
('i32.popcnt', '69'), ('i32.add', '6a'),
('i32.sub', '6b'), ('i32.mul', '6c'),
('i32.div_s', '6d'), ('i32.div_u', '6e'),
('i32.rem_s', '6e'), ('i32.rem_u', '70'),
('i32.and', '71'), ('i32.or', '72'),
('i32.xor', '73'), ('i32.shl', '74'),
('i32.shr_s', '75'), ('i32.shr_u', '76'),
('i32.rotl', '77'), ('i32.rotr', '78'),
('i64.clz', '79'), ('i64.ctz', '7a'),
('i64.popcnt', '7b'), ('i64.add', '7c'),
('i64.sub', '7d'), ('i64.mul', '7e'),
('i64.div_s', '7f'), ('i64.div_u', '80'),
('i64.rem_s', '81'), ('i64.rem_u', '82'),
('i64.and', '83'), ('i64.or', '84'),
('i64.xor', '85'), ('i64.shl', '86'),
('i64.shr_s', '87'), ('i64.shr_u', '88'),
('i64.rotl', '89'), ('i63.rotr', '8a'),
('f32.abs', '8b'), ('f32.neg', '8c'),
('f32.ceil', '8d'), ('f32.floor', '8e'),
('f32.trunc', '8f'), ('f32.nearest', '90'),
('f32.sqrt', '91'), ('f32.add', '92'),
('f32.sub', '93'), ('f32.mul', '94'),
('f32.div', '95'), ('f32.min', '96'),
('f32.max', '97'), ('f32.copysign', '98'),
('f64.abs', '99'), ('f64.neg', '9a'),
('f64.ceil', '9b'), ('f64.floor', '9c'),
('f64.trunc', '9d'), ('f64.nearest', '9e'),
('f64.sqrt', '9f'), ('f64.add', 'a0'),
('f64.sub', 'a1'), ('f64.mul', 'a2'),
('f64.div', 'a3'), ('f64.min', 'a4'),
('f64.max', 'a5'), ('f64.copysign', 'a6')]
num_ops_dict = dict(num_ops)
num_ops_dict_rev = {v: k for k, v in num_ops_dict.items()}
conversion = [('i32.wrap/i64', 'a7'),
('i32.trunc_s/f32', 'a8'),
('i32.trunc_u/f32', 'a9'),
('i32.trunc_s/f64', 'aa'),
('i32.trunc_u/f64', 'ab'),
('i64.extend_s/i32', 'ac'),
('i64.extend_u/i32', 'ad'),
('i64.trunc_s/f32', 'ae'),
('i64.trunc_u/f32', 'af'),
('i64.trunc_s/f64', 'b0'),
('i64.trunc_u/f64', 'b1'),
('f32.convert_s/i32', 'b2'),
('f32.convert_u/i32', 'b3'),
('f32.convert_s/i64', 'b4'),
('f32.convert_u/i64', 'b5'),
('f32.demote/f64', 'b6'),
('f64.convert_s/i32', 'b7'),
('f64.convert_u/i32', 'b8'),
('f64.convert_s/i64', 'b9'),
('f64.convert_u/i64', 'ba'),
('f64.promote/f32', 'bb')]
conversion_dict = dict(conversion)
conversion_dict_rev = {v: k for k, v in conversion_dict.items()}
reinterpretations = [('i32.reinterpret/f32', 'bc'),
('i64.reinterpret/f64', 'bd'),
('f32.reinterpret/i32', 'be'),
('f64.reinterpret/i64', 'bf')]
reinterpretations_dict = dict(reinterpretations)
reinterpretations_dict_rev = {v: k for k,
v in reinterpretations_dict.items()}
section_code = [('type', '01'), ('import', '02'),
('function', '03'), ('table', '04'),
('memory', '05'), ('global', '06'),
('export', '07'), ('start', '08'),
('element', '09'), ('code', '0a'),
('data', '0b'), ('custom', '00')]
section_code_dict = dict(section_code)
section_code_dict_rev = {v: k for k, v in section_code_dict.items()}
class ParsedSection(object):
def __init__(self, section_id, section_name,
payload_length, is_custom_section,
name_len, name, payload_data):
self.section_id = section_id
self.section_name = section_name
self.payload_length = payload_length
self.is_custom_section = is_custom_section
self.name_len = name_len
self.name = name
self.payload_data = payload_data
if not isinstance(self.section_id, int):
raise Exception("section_id must be an int")
if not isinstance(self.section_name, str):
raise Exception("section_name must be a str")
if not isinstance(self.payload_length, int):
raise Exception("payload_length must be an int")
if not isinstance(self.is_custom_section, bool):
raise Exception("is_custom_section must be a bool")
if not isinstance(self.name_len, int):
raise Exception("name_len must be an int")
if not isinstance(self.name, bytearray):
raise Exception("name must be a bytearray")
if not isinstance(self.payload_data, bytearray):
raise Exception("payload_data must be a bytearray")
class ParsedStruct:
version_number = int()
section_list = []
def Conver2Int(little_endian, size, bytelist):
modifier = size - 1
sum = 0
if little_endian:
for bit in reversed(bytelist):
if bit != 0x80:
sum += bit*(pow(16, modifier))
modifier -= 1
return(sum)
else:
for bit in reversed(bytelist):
if bit != 0x80:
sum += bit*(pow(16, modifier))
modifier -= 1
return(sum)
def LEB128UnsingedDecode(bytelist):
result = 0
shift = 0
for byte in bytelist:
result |= (byte & 0x7f) << shift
if (byte & 0x80) == 0:
break
shift += 7
return(result)
def LEB128SingedDecode(bytelist):
result = 0
shift = 0
for byte in bytelist:
result |= (byte & 0x7f) << shift
last_byte = byte
shift += 7
if (byte & 0x80) == 0:
break
if (shift < len(bytelist.len()*8)) and (last_byte & 0x40 == 0x40):
result |= - (1 << shift)
return(result)
def LEB128UnsingedEncode(int_val, num_byte, pad=True):
byte_array = bytearray()
return(byte_array)
pass
def LEB128SingedEncode(int_val, num_byte, pad=True):
byte_array = bytearray()
return(byte_array)
pass
def ReadLEB128OperandsU(section_byte, offset, operand_count):
seen_padding = False
byte_count = 0
operand = []
return_list = []
read_bytes = 0
for i in range(0, operand_count):
while True:
# print(Colors.red + repr(section_byte) + Colors.ENDC)
byte = int(section_byte[6][offset])
byte_count += 1
read_bytes += 1
offset += 1
if not seen_padding:
operand.append(byte)
if byte == 0x80:
# we have seen a padding byte so we should read 4 bytes in
# total
seen_padding = True
elif byte & 0x80 != 0:
# we havent reached the last byre of the operand yet
pass
else:
# we are reading the last byte of the operand
break
if seen_padding:
# if seen_padding:
if seen_padding and byte_count == 4:
break
elif seen_padding and not byte_count == 4:
operand.append(byte)
seen_padding = False
byte_count = 0
return_list.append(operand)
operand = []
return return_list, offset, read_bytes
def ReadLEB128OperandsS(section_byte, offset, operand_count):
pass
class CLIArgParser(object):
def __init__(self):
parser = argparse.ArgumentParser()
parser.add_argument("--wast", type=str,
help="path to the wasm text file")
parser.add_argument("--wasm", type=str,
help="path to the wasm object file")
parser.add_argument("--asb", type=str,
help="path to the wast file to assemble")
parser.add_argument("--dis", type=str,
help="path to the wasm file to disassemble")
parser.add_argument("-o", type=str, help="the path to the output file")
self.args = parser.parse_args()
if self.args.wasm is not None and self.args.wast is not None:
raise Exception("the --wast option and the --wasm option cannot\
be set at the same time. you need to choose one.")
def getWASTPath(self):
return self.args.wast
def getWASMPath(self):
return self.args.wasm
def getASPath(self):
return self.args.asb
def getDISASPath(self):
return self.args.dis
def getOutputPath(self):
return self.args.o
class WASMText(object):
wast_header_type = dict()
wast_header_import = dict()
wast_header_table = dict()
wast_header_elem = dict()
wast_header_memory = dict()
wast_header_data = dict()
wast_header_export = dict()
wast_header_func = dict()
wast_func_bodies = dict()
def __init__(self, file_path):
self.wasmt_file = open(file_path, "r")
self.file_path = file_path
self.test_file = open("./test.txt", "a")
def write(self, text):
self.wasmt_file.write(text)
def reopen_for_read(self):
self.wasmt_file.close()
self.wasmt_file.open(self.file_path, "r")
def reopen_for_write(self):
self.wasmt_file.close()
self.wasmt_file.open(self.file_path, "w")
def test_print(self):
for line in self.wasmt_file:
print(line, file=self.test_file)
sys.stdout.write(line)
sys.stdout.write('\n')
def RegExSearch(self):
# pattern1 = re.compile('^\(type\ \$[a-zA-Z0-9]+\$[v|i]+\ \(func$\)')
pattern1 = re.compile('[ \t]+\(type.+\)')
# pattern1 = re.compile('[a-zA-Z0-9]+')
pattern2 = re.compile('[ \t]+\(import.+\)')
pattern3 = re.compile('[ \t]+\(table.+\)')
pattern4 = re.compile('[ \t]+\(elem.+\)')
pattern5 = re.compile('[ \t]+\(memory.+\)')
pattern6 = re.compile('[ \t]+\(data.+\)')
pattern7 = re.compile('[ \t]+\(export.+\)')
pattern8 = re.compile('[ \t]+\(func.+\)')
linenumber = 0
for line in self.wasmt_file:
# print(line)
linenumber += 1
result = re.match(pattern1, line)
if result is not None:
self.wast_header_type[linenumber] = line
result = re.match(pattern2, line)
if result is not None:
self.wast_header_import[linenumber] = line
result = re.match(pattern3, line)
if result is not None:
self.wast_header_table[linenumber] = line
result = re.match(pattern4, line)
if result is not None:
self.wast_header_elem[linenumber] = line
result = re.match(pattern5, line)
if result is not None:
self.wast_header_memory[linenumber] = line
result = re.match(pattern6, line)
if result is not None:
self.wast_header_data[linenumber] = line
result = re.match(pattern7, line)
if result is not None:
self.wast_header_export[linenumber] = line
result = re.match(pattern8, line)
if result is not None:
self.wast_header_func[linenumber] = line
def FuncParser(self):
parentheses_cnt = 0
func_cnt = 0
funcbody = str()
pos = 0
for key in self.wast_header_func:
self.wasmt_file.seek(0, 0)
parentheses_cnt = 0
i = 0
alive = False
for line in self.wasmt_file:
i += 1
if i == key or alive:
func_cnt += 1
funcbody += line
pos = line.find('(', pos, len(line))
while(pos != -1):
parentheses_cnt += 1
pos = line.find('(', pos + 1, len(line))
pos = 0
pos = line.find(')', pos, len(line))
while(pos != -1):
parentheses_cnt -= 1
pos = line.find('(', pos + 1, len(line))
pos = 0
if parentheses_cnt == 0:
self.wast_func_bodies[func_cnt] = funcbody
func_cnt = 0
parentheses_cnt = 0
funcbody = ""
alive = False
break
elif parentheses_cnt > 0:
# we need to parse another line
alive = True
continue
else:
# parentheses_cnt < 0. the wasmt file is malformed.
raise Exception('malformed: mismatching number \
of parentheses')
def FuncParserTest(self):
for k in self.wast_func_bodies:
print(self.wast_func_bodies[k])
def PrintTypeDict(self):
for element in self.wast_header_type:
# print(self.wast_header_type[element])
print(Colors.green + self.wast_header_type[element] + Colors.ENDC)
def PrintImportDict(self):
for element in self.wast_header_import:
print(Colors.red + self.wast_header_import[element] + Colors.ENDC)
def PrintTableDict(self):
for element in self.wast_header_table:
print(Colors.purple + self.wast_header_table[element] + Colors.ENDC)
def PrintElemDict(self):
for element in self.wast_header_elem:
print(Colors.blue + self.wast_header_elem[element] + Colors.ENDC)
def PrintMemoryDict(self):
for element in self.wast_header_memory:
print(Colors.darkgrey + self.wast_header_memory[element] +
Colors.ENDC)
def PrintDataDict(self):
for element in self.wast_header_data:
print(Colors.yellow + self.wast_header_data[element] + Colors.ENDC)
def PrintExportDict(self):
for element in self.wast_header_export:
print(Colors.cyan + self.wast_header_export[element] + Colors.ENDC)
def PrintFuncDict(self):
for element in self.wast_header_func:
print(Colors.purple + self.wast_header_func[element] + Colors.ENDC)
def getTypeHeader(self):
return self.wast_header_type
def getImportHeader(self):
return self.wast_header_import
def getTableHeader(self):
return self.wast_header_table
def getElemHeader(self):
return self.wast_header_elem
def getMemoryHeader(self):
return self.wast_header_memory
def getDataHeader(self):
return self.wast_header_data
def getExportHeader(self):
return self.wast_header_export
def getFuncHeader(self):
return self.wast_header_func
def getFuncBodies(self):
return self.wast_func_bodies
def __del__(self):
self.test_file.close()
self.wasmt_file.close()
# i know the name is off-putting but this is technically our lexer.
class FuncBodyParser(object):
wast_obj_func = dict()
def __init__(self, wast_obj_func):
self.wast_obj_func = wast_obj_func
def ParseBody(self):
pos = 0
lastopenparen = 0
for funcbody in self.wast_obj_func:
for line in funcbody:
parentheses_cnt = 0
pos = line.find('(', pos, len(line))
lastopenparen = pos
while(pos != -1):
parentheses_cnt += 1
pos = line.find('(', pos + 1, len(line))
lastopenparen
pos = 0
pos = line.find(')', pos, len(line))
while(pos != -1):
parentheses_cnt -= 1
pos = line.find('(', pos + 1, len(line))
pos = 0
if parentheses_cnt == 0:
parentheses_cnt = 0
break
elif parentheses_cnt > 0:
# we need to parse another line
continue
else:
# parentheses_cnt < 0. the wasmt file is malformed
print("goofball")
def ParseBodyV2(self):
sexpr_pattern = re.compile('\([^(]*?\)')
for funcbody in self.wast_obj_func:
print(Colors.blue + self.wast_obj_func[funcbody] + Colors.ENDC)
most_concat_sexpr = re.findall(sexpr_pattern,
self.wast_obj_func[funcbody])
print ('-----------------------------')
for elem in most_concat_sexpr:
print(elem)
print ('-----------------------------')
elem.split
def ParseBodyV3(self, Print):
stack = []
expr = []
full = []
sexpr_greedy = re.compile('\s*(?:(?P<lparen>\()|(?P<rparen>\))|(?P<operandnum>[i|ui][0-9]+$)|(?P<regarg>\$[0-9]+$)|(?P<keyword>[a-zA-Z0-9\._]+)|(?P<identifier>[\$][a-zA-Z0-9_\$]+))')
for funcbody in self.wast_obj_func:
for stackval in re.finditer(sexpr_greedy,
self.wast_obj_func[funcbody]):
for k, v in stackval.groupdict().items():
if Print:
if v is not None:
print(k, v)
if v is not None:
if k == 'rparen':
flag = True
expr.append(v)
while flag:
temp = stack.pop()
if temp is '(':
flag = False
expr.append(temp)
full.append(expr)
expr = []
else:
stack.append(v)
for val in full:
print(val)
return(full)
class WASM_CodeEmitter(object):
Obj_file = []
Obj_Header = []
little_endian = True
def __init__(self, stack):
self.stack = stack
def SetNewStack(self, new_stack):
self.stack = new_stack
def Obj_Header_32(self):
magic_number = '0061736d'
version = '01000000'
self.Obj_file.append(magic_number)
self.Obj_file.append(version)
def EmitTypeHeader(self):
val_cnt = 0
byte_cnt = 0
word = str()
param_sentence = str()
result_sentence = str()
tmp_obj = []
for stacks in self.stack:
for stack_value in stacks:
if stack_value in WASM_OP_Code.type_ops_dict:
if stack_value == 'func':
tmp_obj.append(WASM_OP_Code.type_ops_dict[stack_value])
if param_sentence != "":
tmp_obj.append(param_sentence)
else:
tmp_obj.append("00")
byte_cnt += 1
if result_sentence != "":
tmp_obj.append(result_sentence)
else:
tmp_obj.append("00")
byte_cnt += 1
param_sentence = ""
result_sentence = ""
val_cnt = 0
else:
word += WASM_OP_Code.type_ops_dict[stack_value]
val_cnt += 1
byte_cnt += 1
elif stack_value == 'param':
param_sentence += str(bytes([val_cnt])) + word
byte_cnt += 1
val_cnt = 0
word = ""
elif stack_value == 'result':
result_sentence += str(bytes([val_cnt])) + word
byte_cnt += 1
val_cnt = 0
word = ""
tmp_obj.insert(0, '8080')
tmp_obj.insert(0, format(byte_cnt, 'x'))
# tmp_obj.insert(0, WASM_OP_Code.section_code_dict['type'])
tmp_obj.insert(0, "01")
# tmp_obj.insert(0, '01')
self.Obj_Header = tmp_obj
def PrintTypeHeaderObj(self):
# print(self.Obj_Header)
for byte in self.Obj_Header:
print(byte)
def Dump_Obj_STDOUT(self):
for bytecode in self.Obj_file:
print(bytecode)
class ObjReader(object):
parsedstruct = ParsedStruct
def __init__(self, file_path, endianness, is_extended_isa):
self.wasm_file = open(file_path, "rb")
self.file_path = file_path
self.endianness = endianness
self.is_extended_isa = is_extended_isa
def testprintall(self):
for line in self.wasm_file:
print(line)
self.wasm_file.seek(0)
def testprintbyteall(self):
byte = self.wasm_file.read(1)
print(byte)
while byte != b"":
byte = self.wasm_file.read(1)
print(byte)
self.wasm_file.seek(0)
def ReadWASM(self):
# read the magic cookie
byte = self.wasm_file.read(WASM_OP_Code.uint32)
if byte != WASM_OP_Code.magic_number.to_bytes(
WASM_OP_Code.uint32, byteorder=self.endianness, signed=False):
raise Exception("bad magic cookie")
# read the version number
byte = self.wasm_file.read(WASM_OP_Code.uint32)
if byte != WASM_OP_Code.version_number.to_bytes(
WASM_OP_Code.uint32, byteorder=self.endianness, signed=False):
raise Exception("bad version number")
else:
self.parsedstruct.version_number = byte
while self.ReadSection():
pass
def ReadSection(self):
section_id_int = int()
payload_length_int = int()
name_len_int = int()
name = str()
payload_data = bytearray()
is_custom_section = False
not_end_of_the_line = True
section_id = self.wasm_file.read(WASM_OP_Code.varuint7)
if section_id == b"":
not_end_of_the_line = False
else:
section_id_int = LEB128UnsingedDecode(section_id)
payload_length = self.wasm_file.read(WASM_OP_Code.varuint32)
payload_length_int = LEB128UnsingedDecode(payload_length) + 1
# print(payload_length_int)
if section_id is not WASM_OP_Code.section_code_dict['custom']:
payload_data = self.wasm_file.read(payload_length_int)
# print(payload_data)
else:
is_custom_section = True
name_len = self.wasm_file.read(WASM_OP_Code.varuint32)
name_len_int = Conver2Int(self.endianness,
WASM_OP_Code.varuint32,
name_len)
# print(name_len)
name = self.wasm_file.read(name_len)
payload_data = self.wasm_file.read(
payload_length_int - name_len_int - WASM_OP_Code.varuint32)
self.parsedstruct.section_list.append([section_id_int, 'jojo',
payload_length_int,
is_custom_section,
name_len_int, name,
payload_data])
return(not_end_of_the_line)
def PrintAllSection(self):
for section in self.parsedstruct.section_list:
print(section)
def DisassembleDebug(self, byte, offset):
matched = False
if WASM_OP_Code.control_flow_ops_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.control_flow_ops_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.type_ops_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.type_ops_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.num_ops_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.num_ops_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.call_ops_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.call_ops_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.mem_ops_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.mem_ops_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.consts_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.consts_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.conversion_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.conversion_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.var_access_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.var_access_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.var_access_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.var_access_dict_rev[byte] + Colors.ENDC)
matched = True
elif WASM_OP_Code.param_ops_dict_rev.get(byte):
print(Colors.green +
WASM_OP_Code.param_ops_dict_rev[byte] + Colors.ENDC)
matched = True
offset += 1
return offset, matched
def Disassemble(self, section_byte, offset):
matched = False
read_bytes = 0
read_bytes_temp = 0
instruction = str()
print('offset = ' + repr(offset))
byte = format(section_byte[6][offset], '02x')
print(Colors.blue + repr(byte) + Colors.ENDC)
offset += 1
read_bytes += 1
for op_code in WASM_OP_Code.all_ops:
if op_code[1] == byte:
matched = True
if op_code[2]:
print(op_code[2])
print(op_code[3])
if isinstance(op_code[3], tuple):
temp, offset, read_bytes_temp = ReadLEB128OperandsU(
section_byte, offset, len(op_code[3]))
print('temp:' + repr(temp))
for i in range(0, len(op_code[3])):