from opcodes import *
import numpy as np
import struct as stc
class ParseFlags:
def __init__(self, wast_path, wasm_path, as_path, disa_path, out_path, dbg, unval, memdump
, idxspc, run, metric, gas, entry):
self.wast_path = wast_path
self.wasm_path = wasm_path
self.as_path = as_path
self.disa_path = disa_path
self.out_path = out_path
self.dbg = dbg
self.unval = unval
self.memdump = memdump
self.idxspc = idxspc
self.run = run
self.metric = metric
self.gas = gas
self.entry = entry
# pretty print
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'
def LEB128UnsignedDecode(bytelist):
result = 0
shift = 0
for byte in bytelist:
result |= (byte & 0x7f) << shift
if (byte & 0x80) == 0:
break
shift += 7
return(result)
def LEB128SignedDecode(bytelist):
result = 0
shift = 0
for byte in bytelist:
result |= (byte & 0x7f) << shift
last_byte = byte
shift += 7
if (byte & 0x80) == 0:
break
if last_byte & 0x40:
result |= - (1 << shift)
return(result)
def LEB128UnsignedEncode(int_val):
if int_val < 0:
raise Exception("value must not be negative")
elif int_val == 0:
return bytes([0])
byte_array = bytearray()
while int_val:
byte = int_val & 0x7f
byte_array.append(byte | 0x80)
int_val >>= 7
byte_array[-1] ^= 0x80
return(byte_array)
def LEB128SignedEncode(int_val):
byte_array = bytearray()
while True:
byte = int_val & 0x7f
byte_array.append(byte | 0x80)
int_val >>= 7
if (int_val == 0 and byte&0x40 == 0) or (int_val == -1 and byte&0x40):
byte_array[-1] ^= 0x80
break
return(byte_array)
# @DEVI-FIXME-MVP-only-we currently inly support consts and get_global
# interprets the init-exprs
def init_interpret(expr):
offset = 0
byte, offset, dummy = Read(expr, offset, 'uint8')
const = int()
if byte == 65:
# @DEVI-FIXME-the spec says varint32, obviously we are not doing that
# since it will return neg values which are meningless and break things
const, offset, dummy = Read(expr, offset, 'varuint32')
elif byte == 66:
const, offset, dummy = Read(expr, offset, 'varint64')
elif byte == 67:
const, offset, dummy = Read(expr, offset, 'uint32')
elif byte == 68:
const, offset, dummy = Read(expr, offset, 'uint64')
elif byte == 35:
pass
else:
raise Exception(Colors.red + "illegal opcode for an MVP init expr." + Colors.ENDC)
block_end, offset, dummy = Read(expr, offset, 'uint8')
if block_end != 11:
raise Exception(Colors.red + "init expr has no block end." + Colors.ENDC)
return(const)
# reads different-typed values from a byte array, takes in the bytearray, the
# current offset the read should be performed from and the kind of value that
# should be read. returns the read value as a decimal number, the updated
# offset and the number of bytes read
def Read(section_byte, offset, kind):
operand = []
return_list = int()
read_bytes = 0
if kind == 'varuint1' or kind == 'varuint7' or kind == 'varuint32' or kind == 'varuint64':
while True:
byte = int(section_byte[offset])
read_bytes += 1
offset += 1
operand.append(byte)
if byte == 0x80:
pass
elif byte & 0x80 != 0:
pass
else:
# we have read the last byte of the operand
break
return_list = LEB128UnsignedDecode(operand)
operand = []
elif kind == 'uint8' or kind == 'uint16' or kind == 'uint32' or kind == 'uint64':
byte = section_byte[offset: offset + TypeDic[kind]]
read_bytes += TypeDic[kind]
offset += TypeDic[kind]
operand.append(byte)
return_list = int.from_bytes(operand[0], byteorder='little', signed=False)
operand = []
elif kind == 'varint1' or kind == 'varint7' or kind == 'varint32' or kind == 'varint64':
while True:
byte = int(section_byte[offset])
read_bytes += 1
offset += 1
operand.append(byte)
# @DEVI-what happens when we decode a 56-bit value?
if byte == 0x80 or byte == 0xff:
pass
elif byte & 0x80 != 0:
pass
else:
# we have read the lasy byte of the operand
break
return_list = LEB128SignedDecode(operand)
operand = []
return return_list, offset, read_bytes
def ror(val, type_length, rot_size):
rot_size_rem = rot_size % type_length
return (((val >> rot_size_rem) & (2**type_length - 1)) | ((val & (2**rot_size_rem - 1)) << (type_length - rot_size_rem)))
def rol(val, type_length, rot_size):
rot_size_rem = rot_size % type_length
return (((val << rot_size_rem) & (2**type_length - 1)) | ((val & ((2**type_length - 1) - (2**(type_length - rot_size_rem) - 1))) >> (type_length - rot_size_rem)))
# @DEVI-these are here because i wanted to test them to make sure what i thik is
# happening is really happening
def reinterpretf32toi32(val):
return (stc.unpack("i", stc.pack("f" ,val))[0])
def reinterpretf64toi64(val):
return (stc.unpack("Q", stc.pack("d", val))[0])
def reinterpreti32tof32(val):
return (stc.unpack("f", stc.pack("i", val))[0])
def reinterpreti64tof64(val):
return (stc.unpack("d", stc.pack("Q", val))[0])
# @DEVI-FIXME
def clz(val, _type):
cnt = int()
if _type == 'uint32':
bits = np.uint32(val)
power = 31
while power > -1:
if val & 2**power == 0:
cnt += 1
else:
break
power -= 1
elif _type == 'uint64':
bits = bin(np.uint64(val))
power = 63
while power > -1:
if val & 2**power == 0:
cnt += 1
else:
break
power -= 1
else:
raise Exception(Colors.red + "unsupported type passed to clz." + Colors.ENDC)
return cnt
# @DEVI-FIXME
def ctz(val, _type):
cnt = int()
power = int()
if _type == 'uint32':
bits = np.uint32(val)
while power < 32:
if val & 2**power == 0:
cnt += 1
else:
break
power += 1
elif _type == 'uint64':
bits = bin(np.uint64(val))
while power < 64:
if val & 2**power == 0:
cnt += 1
else:
break
power += 1
else:
raise Exception(Colors.red + "unsupported type passed to ctz." + Colors.ENDC)
return cnt
# @DEVI-FIXME
def pop_cnt(val, _type):
cnt = int()
power = int()
if _type == 'uint32':
bits = np.uint32(val)
while power < 32:
if val & 2**power != 0:
cnt += 1
power += 1
elif _type == 'uint64':
bits = bin(np.uint64(val))
while power < 64:
if val & 2**power != 0:
cnt += 1
power += 1
else:
raise Exception(Colors.red + "unsupported type passed to pop_cnt." + Colors.ENDC)
return cnt
def gen_label(label_stack):
counter += 1
label_stack.append(counter)
def dumpprettysections(sections_list, width, section_name):
line_counter = 0
str_list = []
module_counter = 0
section_offset = 0
for sections in sections_list:
print (Colors.cyan + Colors.BOLD + "module " + repr(module_counter) + Colors.ENDC)
for section in sections.section_list:
if section_name == "": pass
else:
if section_name != SectionID[section[0]]:
continue
print(Colors.green + Colors.BOLD + SectionID[section[0]] + " section" + Colors.ENDC)
#print(Colors.green + "length: " + Colors.blue + section[1] + Colors.ENDC)
print(Colors.green + "length: " + Colors.blue + repr(section[2]) + Colors.ENDC)
print(Colors.green + "is custom section: " + Colors.blue + repr(section[3]) + Colors.ENDC)
print(Colors.green + "name length: " + Colors.blue + repr(section[4]) + Colors.ENDC)
print(Colors.green + "name: " + Colors.blue + section[5] + Colors.ENDC)
print("\t", end="")
for offset in range(0, width):
if offset <= 15:
print(Colors.yellow + hex(offset) + " " + Colors.ENDC, end="")
else:
print(Colors.yellow + hex(offset) + " " + Colors.ENDC, end="")
print()
print(Colors.yellow + Colors.BOLD + hex(section_offset) + "\t" + Colors.ENDC, end="")
for byte in section[6]:
if line_counter == width:
section_offset += width
#print("\t\t", end="")
line_counter = 0
for char in str_list:
print(Colors.green + "|" + Colors.ENDC, end="")
if ord(char) < 32: print(" ", end="")
else: print(char, end="")
str_list = []
print()
print(Colors.yellow + Colors.BOLD + hex(section_offset) + "\t" + Colors.ENDC, end="")
print(format(byte, '02x') + " ", end="")
str_list.append(chr(byte))
line_counter += 1
#print(" ", end="")
for i in range(0, width - line_counter): print(" ", end="")
for char in str_list:
if ord(char) < 32: print(" ", end="")
else: print(char, end="")
print(Colors.green + "|" + Colors.ENDC, end="")
str_list = []
line_counter = 0
section_offset = 0
print()
str_list = []
line_counter = 0
module_counter += 1
section_offset = 0
def popcnt32(r1):
temp = r1
temp = (temp & 0x55555555) + ((temp >> 1) & 0x55555555)
temp = (temp & 0x33333333) + ((temp >> 2) & 0x33333333)
temp = (temp & 0x0f0f0f0f) + ((temp >> 4) & 0x0f0f0f0f)
temp = (temp & 0x00ff00ff) + ((temp >> 8) & 0x00ff00ff)
temp = (temp & 0x0000ffff) + ((temp >> 16) & 0x0000ffff)
return temp
def popcnt64(r1):
temp = r1
temp = (temp & 0x5555555555555555) + ((temp >> 1) & 0x5555555555555555)
temp = (temp & 0x3333333333333333) + ((temp >> 2) & 0x3333333333333333)
temp = (temp & 0x0f0f0f0f0f0f0f0f) + ((temp >> 4) & 0x0f0f0f0f0f0f0f0f)
temp = (temp & 0x00ff00ff00ff00ff) + ((temp >> 8) & 0x00ff00ff00ff00ff)
temp = (temp & 0x0000ffff0000ffff) + ((temp >> 16) & 0x0000ffff0000ffff)
temp = (temp & 0x00000000ffffffff) + ((temp >> 32) & 0x00000000ffffffff)
return temp
def clz32(r1):
if r1 == 0: return 32
temp_r1 = r1
n = 0
if temp_r1 & 0xffff0000 == 0:
n += 16
temp_r1 = temp_r1 << 16
if temp_r1 & 0xff000000 == 0:
n += 8
temp_r1 = temp_r1 << 8
if temp_r1 & 0xf0000000 == 0:
n += 4
temp_r1 = temp_r1 << 4
if temp_r1 & 0xc0000000 == 0:
n += 2
temp_r1 = temp_r1 << 2
if temp_r1 & 0x8000000 == 0:
n += 1
return n
def clz64(r1):
if r1 == 0: return 64
temp_r1 = r1
n = 0
if temp_r1 & 0xffffffff00000000 == 0:
n += 32
temp_r1 = temp_r1 << 32
if temp_r1 & 0xffff000000000000 == 0:
n += 16
temp_r1 == temp_r1 << 16
if temp_r1 & 0xff00000000000000 == 0:
n+= 8
temp_r1 = temp_r1 << 8
if temp_r1 & 0xf000000000000000 == 0:
n += 4
temp_r1 = temp_r1 << 4
if temp_r1 & 0xc000000000000000 == 0:
n += 2
temp_r1 = temp_r1 << 2
if temp_r1 & 0x8000000000000000 == 0:
n += 1
return n
def ctz32(r1):
if r1 == 0: return 32
temp_r1 = r1
n = 0
if temp_r1 & 0x0000ffff == 0:
n += 16
temp_r1 = temp_r1 >> 16
if temp_r1 & 0x000000ff == 0:
n += 8
temp_r1 = temp_r1 >> 8
if temp_r1 & 0x0000000f == 0:
n += 4
temp_r1 = temp_r1 >> 4
if temp_r1 & 0x00000003 == 0:
n += 2
temp_r1 = temp_r1 >> 2
if temp_r1 & 0x00000001 == 0:
n += 1
return n
def ctz64(r1):
if r1 == 0: return 64
temp_r1 = r1
n = 0
if temp_r1 & 0x00000000ffffffff == 0:
n += 32
temp_r1 = temp_r1 >> 32
if temp_r1 & 0x000000000000ffff == 0:
n += 16
temp_r1 = temp_r1 >> 16
if temp_r1 & 0x00000000000000ff == 0:
n += 8
temp_r1 = temp_r1 >> 8
if temp_r1 & 0x000000000000000f == 0:
n += 4
temp_r1 = temp_r1 >> 4
if temp_r1 & 0x0000000000000003 == 0:
n += 2
temp_r1 = temp_r1 >> 2
if temp_r1 & 0x0000000000000001 == 0:
n += 1
return n
