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487 lines
11 KiB
Python
487 lines
11 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Talks to an XMLRPC server running inside of an active IDA Pro instance,
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in order to query it about the database. Allows symbol resolution and
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interactive debugging.
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"""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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import errno
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import functools
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import socket
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import sys
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import time
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import traceback
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import gdb
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import six
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import pwndbg.arch
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import pwndbg.config
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import pwndbg.decorators
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import pwndbg.elf
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import pwndbg.events
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import pwndbg.memoize
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import pwndbg.memory
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import pwndbg.regs
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from pwndbg.color import message
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try:
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import xmlrpc.client as xmlrpclib
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except:
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import xmlrpclib
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ida_rpc_host = pwndbg.config.Parameter('ida-rpc-host', '127.0.0.1', 'ida xmlrpc server address')
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ida_rpc_port = pwndbg.config.Parameter('ida-rpc-port', 8888, 'ida xmlrpc server port')
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ida_enabled = pwndbg.config.Parameter('ida-enabled', True, 'whether to enable ida integration')
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ida_timeout = pwndbg.config.Parameter('ida-timeout', 2, 'time to wait for ida xmlrpc in seconds')
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xmlrpclib.Marshaller.dispatch[int] = lambda _, v, w: w("<value><i8>%d</i8></value>" % v)
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if six.PY2:
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xmlrpclib.Marshaller.dispatch[long] = lambda _, v, w: w("<value><i8>%d</i8></value>" % v)
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xmlrpclib.Marshaller.dispatch[type(0)] = lambda _, v, w: w("<value><i8>%d</i8></value>" % v)
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_ida = None
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# to avoid printing the same exception multiple times, we store the last exception here
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_ida_last_exception = None
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# to avoid checking the connection multiple times with no delay, we store the last time we checked it
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_ida_last_connection_check = 0
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@pwndbg.decorators.only_after_first_prompt()
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@pwndbg.config.Trigger([ida_rpc_host, ida_rpc_port, ida_timeout])
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def init_ida_rpc_client():
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global _ida, _ida_last_exception, _ida_last_connection_check
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if not ida_enabled:
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return
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now = time.time()
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if _ida is None and (now - _ida_last_connection_check) < int(ida_timeout) + 5:
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return
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addr = 'http://{host}:{port}'.format(host=ida_rpc_host, port=ida_rpc_port)
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_ida = xmlrpclib.ServerProxy(addr)
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socket.setdefaulttimeout(int(ida_timeout))
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exception = None # (type, value, traceback)
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try:
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_ida.here()
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print(message.success("Pwndbg successfully connected to Ida Pro xmlrpc: %s" % addr))
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except socket.error as e:
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if e.errno != errno.ECONNREFUSED:
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exception = sys.exc_info()
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_ida = None
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except socket.timeout:
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exception = sys.exc_info()
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_ida = None
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except xmlrpclib.ProtocolError:
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exception = sys.exc_info()
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_ida = None
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if exception:
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if not isinstance(_ida_last_exception, exception[0]) or _ida_last_exception.args != exception[1].args:
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if hasattr(pwndbg.config, "exception_verbose") and pwndbg.config.exception_verbose:
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print(message.error("[!] Ida Pro xmlrpc error"))
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traceback.print_exception(*exception)
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else:
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exc_type, exc_value, _ = exception
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print(message.error('Failed to connect to IDA Pro ({}: {})'.format(exc_type.__qualname__, exc_value)))
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if exc_type is socket.timeout:
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print(message.notice('To increase the time to wait for IDA Pro use `') + message.hint('set ida-timeout <new-timeout-in-seconds>') + message.notice('`'))
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else:
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print(message.notice('For more info invoke `') + message.hint('set exception-verbose on') + message.notice('`'))
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print(message.notice('To disable IDA Pro integration invoke `') + message.hint('set ida-enabled off') + message.notice('`'))
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_ida_last_exception = exception and exception[1]
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_ida_last_connection_check = now
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class withIDA(object):
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def __init__(self, fn):
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self.fn = fn
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functools.update_wrapper(self, fn)
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def __call__(self, *args, **kwargs):
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if _ida is None:
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init_ida_rpc_client()
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if _ida is not None:
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return self.fn(*args, **kwargs)
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return None
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def withHexrays(f):
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@withIDA
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@functools.wraps(f)
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def wrapper(*a, **kw):
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if _ida.init_hexrays_plugin():
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return f(*a, **kw)
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return wrapper
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def takes_address(function):
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@functools.wraps(function)
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def wrapper(address, *args, **kwargs):
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return function(l2r(address), *args, **kwargs)
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return wrapper
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def returns_address(function):
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@functools.wraps(function)
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def wrapper(*args, **kwargs):
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return r2l(function(*args, **kwargs))
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return wrapper
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@pwndbg.memoize.reset_on_stop
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def available():
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if not ida_enabled:
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return False
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return can_connect()
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@withIDA
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def can_connect():
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return True
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def l2r(addr):
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exe = pwndbg.elf.exe()
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if not exe:
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raise Exception("Can't find EXE base")
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result = (addr - int(exe.address) + base()) & pwndbg.arch.ptrmask
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return result
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def r2l(addr):
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exe = pwndbg.elf.exe()
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if not exe:
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raise Exception("Can't find EXE base")
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result = (addr - base() + int(exe.address)) & pwndbg.arch.ptrmask
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return result
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def remote(function):
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"""Runs the provided function in IDA's interpreter.
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The function must be self-contained and not reference any
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global variables."""
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@pwndbg.memoize.reset_on_objfile
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def base():
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segaddr = _ida.NextSeg(0)
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base = _ida.get_fileregion_offset(segaddr)
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return segaddr - base
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@withIDA
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@takes_address
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def Comment(addr):
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return _ida.GetCommentEx(addr, 0) or _ida.GetCommentEx(addr)
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@withIDA
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@takes_address
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@pwndbg.memoize.reset_on_objfile
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def Name(addr):
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return _ida.Name(addr)
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@withIDA
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@takes_address
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@pwndbg.memoize.reset_on_objfile
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def GetFuncOffset(addr):
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rv = _ida.GetFuncOffset(addr)
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return rv
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@withIDA
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@takes_address
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@pwndbg.memoize.reset_on_objfile
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def GetType(addr):
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rv = _ida.GetType(addr)
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return rv
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@withIDA
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@returns_address
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def here():
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return _ida.here()
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@withIDA
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@takes_address
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def Jump(addr):
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return _ida.Jump(addr)
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@withIDA
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@takes_address
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@pwndbg.memoize.reset_on_objfile
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def Anterior(addr):
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hexrays_prefix = '\x01\x04; '
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lines = []
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for i in range(10):
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r = _ida.LineA(addr, i)
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if not r: break
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if r.startswith(hexrays_prefix):
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r = r[len(hexrays_prefix):]
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lines.append(r)
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return '\n'.join(lines)
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@withIDA
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def GetBreakpoints():
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for i in range(GetBptQty()):
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yield GetBptEA(i)
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@withIDA
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def GetBptQty():
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return _ida.GetBptQty()
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@withIDA
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@returns_address
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def GetBptEA(i):
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return _ida.GetBptEA(i)
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_breakpoints = []
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@pwndbg.events.cont
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@pwndbg.events.stop
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@withIDA
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def UpdateBreakpoints():
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# XXX: Remove breakpoints from IDA when the user removes them.
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current = set(eval(b.location.lstrip('*')) for b in _breakpoints)
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want = set(GetBreakpoints())
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# print(want)
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for addr in current - want:
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for bp in _breakpoints:
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if int(bp.location.lstrip('*'), 0) == addr:
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# print("delete", addr)
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bp.delete()
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break
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_breakpoints.remove(bp)
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for bp in want - current:
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if not pwndbg.memory.peek(bp):
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continue
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bp = gdb.Breakpoint('*' + hex(int(bp)))
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_breakpoints.append(bp)
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# print(_breakpoints)
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@withIDA
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@takes_address
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def SetColor(pc, color):
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return _ida.SetColor(pc, 1, color)
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colored_pc = None
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@pwndbg.events.stop
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@withIDA
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def Auto_Color_PC():
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global colored_pc
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colored_pc = pwndbg.regs.pc
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SetColor(colored_pc, 0x7f7fff)
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@pwndbg.events.cont
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@withIDA
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def Auto_UnColor_PC():
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global colored_pc
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if colored_pc:
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SetColor(colored_pc, 0xffffff)
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colored_pc = None
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@withIDA
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@returns_address
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@pwndbg.memoize.reset_on_objfile
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def LocByName(name):
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return _ida.LocByName(str(name))
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@withIDA
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@takes_address
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@returns_address
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@pwndbg.memoize.reset_on_objfile
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def PrevHead(addr):
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return _ida.PrevHead(addr)
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@withIDA
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@takes_address
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@returns_address
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@pwndbg.memoize.reset_on_objfile
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def NextHead(addr):
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return _ida.NextHead(addr)
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@withIDA
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@takes_address
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@pwndbg.memoize.reset_on_objfile
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def GetFunctionName(addr):
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return _ida.GetFunctionName(addr)
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@withIDA
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@takes_address
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@pwndbg.memoize.reset_on_objfile
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def GetFlags(addr):
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return _ida.GetFlags(addr)
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@withIDA
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@pwndbg.memoize.reset_on_objfile
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def isASCII(flags):
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return _ida.isASCII(flags)
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@withIDA
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@takes_address
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@pwndbg.memoize.reset_on_objfile
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def ArgCount(address):
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pass
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@withIDA
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def SaveBase(path):
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return _ida.SaveBase(path)
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@withIDA
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def GetIdbPath():
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return _ida.GetIdbPath()
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@takes_address
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@pwndbg.memoize.reset_on_stop
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def has_cached_cfunc(addr):
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return _ida.has_cached_cfunc(addr)
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@withHexrays
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@takes_address
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@pwndbg.memoize.reset_on_stop
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def decompile(addr):
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return _ida.decompile(addr)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetStrucQty():
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return _ida.GetStrucQty()
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetStrucId(idx):
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return _ida.GetStrucId(idx)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetStrucName(sid):
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return _ida.GetStrucName(sid)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetStrucSize(sid):
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return _ida.GetStrucSize(sid)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetMemberQty(sid):
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return _ida.GetMemberQty(sid)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetMemberSize(sid, offset):
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return _ida.GetMemberSize(sid, offset)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetMemberId(sid, offset):
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return _ida.GetMemberId(sid, offset)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetMemberName(sid, offset):
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return _ida.GetMemberName(sid, offset)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetMemberFlag(sid, offset):
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return _ida.GetMemberFlag(sid, offset)
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@withIDA
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@pwndbg.memoize.reset_on_stop
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def GetStrucNextOff(sid, offset):
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return _ida.GetStrucNextOff(sid, offset)
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class IDC(object):
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query = "{k:v for k,v in globals()['idc'].__dict__.items() if type(v) in (int,long)}"
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def __init__(self):
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if available():
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data = _ida.eval(self.query)
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self.__dict__.update(data)
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idc = IDC()
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def print_member(sid, offset):
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mid = GetMemberId(sid, offset)
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mname = GetMemberName(sid, offset) or '(no name)'
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msize = GetMemberSize(sid, offset) or 0
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mflag = GetMemberFlag(sid, offset) or 0
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print(" +%#x - %s [%#x bytes]" % (offset, mname, msize))
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def print_structs():
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for i in range(GetStrucQty() or 0):
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sid = GetStrucId(i)
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name = GetStrucName(sid)
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size = GetStrucSize(sid)
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print("%s - %#x bytes" % (name, size))
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offset = 0
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while offset < size:
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print_member(sid, offset)
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offset = GetStrucNextOff(sid, offset)
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