182 lines
4.2 KiB
Python
182 lines
4.2 KiB
Python
# Disassembler
|
|
|
|
import sys
|
|
import string
|
|
|
|
def dis():
|
|
tb = sys.last_traceback
|
|
while tb.tb_next: tb = tb.tb_next
|
|
distb(tb)
|
|
|
|
def distb(tb):
|
|
disassemble(tb.tb_frame.f_code, tb.tb_lasti)
|
|
|
|
def disco(co):
|
|
disassemble(co, -1)
|
|
|
|
def disassemble(co, lasti):
|
|
code = co.co_code
|
|
labels = findlabels(code)
|
|
n = len(code)
|
|
i = 0
|
|
while i < n:
|
|
c = code[i]
|
|
op = ord(c)
|
|
if op == SET_LINENO and i > 0: print # Extra blank line
|
|
if i == lasti: print '-->',
|
|
else: print ' ',
|
|
if i in labels: print '>>',
|
|
else: print ' ',
|
|
print string.rjust(`i`, 4),
|
|
print string.ljust(opname[op], 15),
|
|
i = i+1
|
|
if op >= HAVE_ARGUMENT:
|
|
oparg = ord(code[i]) + ord(code[i+1])*256
|
|
i = i+2
|
|
print string.rjust(`oparg`, 5),
|
|
if op in hasconst:
|
|
print '(' + `co.co_consts[oparg]` + ')',
|
|
elif op in hasname:
|
|
print '(' + co.co_names[oparg] + ')',
|
|
elif op in hasjrel:
|
|
print '(to ' + `i + oparg` + ')',
|
|
print
|
|
|
|
def findlabels(code):
|
|
labels = []
|
|
n = len(code)
|
|
i = 0
|
|
while i < n:
|
|
c = code[i]
|
|
op = ord(c)
|
|
i = i+1
|
|
if op >= HAVE_ARGUMENT:
|
|
oparg = ord(code[i]) + ord(code[i+1])*256
|
|
i = i+2
|
|
label = -1
|
|
if op in hasjrel:
|
|
label = i+oparg
|
|
elif op in hasjabs:
|
|
label = oparg
|
|
if label >= 0:
|
|
if label not in labels:
|
|
labels.append(label)
|
|
return labels
|
|
|
|
hasconst = []
|
|
hasname = []
|
|
hasjrel = []
|
|
hasjabs = []
|
|
|
|
opname = range(256)
|
|
for op in opname: opname[op] = '<' + `op` + '>'
|
|
|
|
def def_op(name, op):
|
|
opname[op] = name
|
|
|
|
def name_op(name, op):
|
|
opname[op] = name
|
|
hasname.append(op)
|
|
|
|
def jrel_op(name, op):
|
|
opname[op] = name
|
|
hasjrel.append(op)
|
|
|
|
def jabs_op(name, op):
|
|
opname[op] = name
|
|
hasjabs.append(op)
|
|
|
|
# Instruction opcodes for compiled code
|
|
|
|
def_op('STOP_CODE', 0)
|
|
def_op('POP_TOP', 1)
|
|
def_op('ROT_TWO', 2)
|
|
def_op('ROT_THREE', 3)
|
|
def_op('DUP_TOP', 4)
|
|
|
|
def_op('UNARY_POSITIVE', 10)
|
|
def_op('UNARY_NEGATIVE', 11)
|
|
def_op('UNARY_NOT', 12)
|
|
def_op('UNARY_CONVERT', 13)
|
|
def_op('UNARY_CALL', 14)
|
|
|
|
def_op('BINARY_MULTIPLY', 20)
|
|
def_op('BINARY_DIVIDE', 21)
|
|
def_op('BINARY_MODULO', 22)
|
|
def_op('BINARY_ADD', 23)
|
|
def_op('BINARY_SUBTRACT', 24)
|
|
def_op('BINARY_SUBSCR', 25)
|
|
def_op('BINARY_CALL', 26)
|
|
|
|
def_op('SLICE+0', 30)
|
|
def_op('SLICE+1', 31)
|
|
def_op('SLICE+2', 32)
|
|
def_op('SLICE+3', 33)
|
|
|
|
def_op('STORE_SLICE+0', 40)
|
|
def_op('STORE_SLICE+1', 41)
|
|
def_op('STORE_SLICE+2', 42)
|
|
def_op('STORE_SLICE+3', 43)
|
|
|
|
def_op('DELETE_SLICE+0', 50)
|
|
def_op('DELETE_SLICE+1', 51)
|
|
def_op('DELETE_SLICE+2', 52)
|
|
def_op('DELETE_SLICE+3', 53)
|
|
|
|
def_op('STORE_SUBSCR', 60)
|
|
def_op('DELETE_SUBSCR', 61)
|
|
|
|
def_op('PRINT_EXPR', 70)
|
|
def_op('PRINT_ITEM', 71)
|
|
def_op('PRINT_NEWLINE', 72)
|
|
|
|
def_op('BREAK_LOOP', 80)
|
|
def_op('RAISE_EXCEPTION', 81)
|
|
def_op('LOAD_LOCALS', 82)
|
|
def_op('RETURN_VALUE', 83)
|
|
def_op('REQUIRE_ARGS', 84)
|
|
def_op('REFUSE_ARGS', 85)
|
|
def_op('BUILD_FUNCTION', 86)
|
|
def_op('POP_BLOCK', 87)
|
|
def_op('END_FINALLY', 88)
|
|
def_op('BUILD_CLASS', 89)
|
|
|
|
HAVE_ARGUMENT = 90 # Opcodes from here have an argument:
|
|
|
|
name_op('STORE_NAME', 90) # Index in name list
|
|
name_op('DELETE_NAME', 91) # ""
|
|
def_op('UNPACK_TUPLE', 92) # Number of tuple items
|
|
def_op('UNPACK_LIST', 93) # Number of list items
|
|
def_op('UNPACK_ARG', 94) # Number of arguments expected
|
|
name_op('STORE_ATTR', 95) # Index in name list
|
|
name_op('DELETE_ATTR', 96) # ""
|
|
name_op('STORE_GLOBAL', 97) # ""
|
|
name_op('DELETE_GLOBAL', 98) # ""
|
|
|
|
def_op('LOAD_CONST', 100) # Index in const list
|
|
hasconst.append(100)
|
|
name_op('LOAD_NAME', 101) # Index in name list
|
|
def_op('BUILD_TUPLE', 102) # Number of tuple items
|
|
def_op('BUILD_LIST', 103) # Number of list items
|
|
def_op('BUILD_MAP', 104) # Always zero for now
|
|
name_op('LOAD_ATTR', 105) # Index in name list
|
|
def_op('COMPARE_OP', 106) # Comparison operator
|
|
name_op('IMPORT_NAME', 107) # Index in name list
|
|
name_op('IMPORT_FROM', 108) # Index in name list
|
|
|
|
jrel_op('JUMP_FORWARD', 110) # Number of bytes to skip
|
|
jrel_op('JUMP_IF_FALSE', 111) # ""
|
|
jrel_op('JUMP_IF_TRUE', 112) # ""
|
|
jabs_op('JUMP_ABSOLUTE', 113) # Target byte offset from beginning of code
|
|
jrel_op('FOR_LOOP', 114) # Number of bytes to skip
|
|
|
|
name_op('LOAD_LOCAL', 115) # Index in name list
|
|
name_op('LOAD_GLOBAL', 116) # Index in name list
|
|
|
|
jrel_op('SETUP_LOOP', 120) # Distance to target address
|
|
jrel_op('SETUP_EXCEPT', 121) # ""
|
|
jrel_op('SETUP_FINALLY', 122) # ""
|
|
|
|
def_op('SET_LINENO', 127) # Current line number
|
|
SET_LINENO = 127
|