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#
# Copyright (C) 2011 EADS France, Fabrice Desclaux <fabrice.desclaux@eads.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
import os
import sys
from hashlib import md5
from ctypes import *
from miasm.tools.to_c_helper import *
from miasm.tools.emul_lib import libcodenat_interface
# interrupt with eip update after instr
EXCEPT_CODE_AUTOMOD = (1<<0)
EXCEPT_SOFT_BP = (1<<1)
# interrupt with eip at instr
EXCEPT_UNK_MEM_AD = (1<<2)
EXCEPT_THROW_SEH = (1<<3)
EXCEPT_UNK_EIP = (1<<4)
EXCEPT_ACCESS_VIOL = (1<<5)
EXCEPT_INT_DIV_BY_ZERO = (1<<6)
EXCEPT_PRIV_INSN = (1<<7)
EXCEPT_ILLEGAL_INSN = (1<<8)
EXCEPTION_BREAKPOINT = 0x80000003
EXCEPTION_ACCESS_VIOLATION = 0xc0000005
EXCEPTION_INT_DIVIDE_BY_ZERO = 0xc0000094
EXCEPTION_PRIV_INSTRUCTION = 0xc0000096
EXCEPTION_ILLEGAL_INSTRUCTION = 0xc000001d
PAGE_READ = 1
PAGE_WRITE = 2
PAGE_EXEC = 4
class bloc_nat:
def __init__(self, offset = 0, b = None, module_c = None, c_source = None, log_mn = False, log_regs = False):
self.b = b
self.module_c = module_c
self.c_source = c_source
blocs_nat = {}
def gen_C_module(c_source):
lib_name = 'emul_cache/out_'+md5(c_source).hexdigest()
lib_dir = os.path.dirname(os.path.realpath(__file__))
lib_dir = os.path.join(lib_dir, 'emul_lib')
a = None
try:
aa = os.stat(lib_name+'.so')
a = cdll.LoadLibrary('./%s.so'%lib_name)
except:
a = None
if a == None:
open(lib_name+'.c', 'w').write(c_source)
gcc_opts = " -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes "
gcc_opts += " -fPIC -I/usr/include/python2.6 "
os.system('gcc -c '+gcc_opts + ' -L%s -lcodenat -lpython2.6 %s.c -o %s.o'%(lib_dir, lib_name, lib_name))
gcc_opts = ' -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions '
gcc_opts += ' -L%s -lcodenat '%lib_dir
gcc_opts_end = ' -Wl,-rpath,%s '%lib_dir
os.system('gcc ' + gcc_opts + '%s.o -o %s.so '%(lib_name, lib_name) + gcc_opts_end)
a = cdll.LoadLibrary('%s.so'%lib_name)
return a
def del_bloc_in_range(known_blocs, ad1, ad2):
bloc_out = {}
for ad in known_blocs:
bn = known_blocs[ad]
# XXX no lines in bloc?
if not bn.b.lines:
continue
if bn.b.lines[0].offset>=ad2 or bn.b.lines[-1].offset + bn.b.lines[-1].l <= ad1:
#bloc_out.append(b)
bloc_out[ad] = bn
else:
#print 'inv bloc', bn.b.label
pass
return bloc_out
def vm_save_state(fname):
vmem = vm_get_all_memory()
return vmem
#XXX
libcntcc = None
def codenat_tcc_load():
global libcntcc
from distutils.sysconfig import get_python_inc
import emul_lib.libcodenat_tcc as libcntcc
lib_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)), "emul_lib")
lib_path = os.path.join(lib_dir, 'libcodenat_tcc.so')
libcodenat_path = libcodenat_interface.__file__
libdir = os.path.dirname(libcodenat_path)
# XXX HACK
# As debian, ubuntu, ... have moved some include files using arch directory,
# TCC doesn't know them, so we get the info from GCC
# For example /usr/include/x86_64-linux-gnu which contains limits.h
from subprocess import Popen, PIPE
p = Popen(["cc", "-Wp,-v", "-E", "-"], stdout = PIPE, stderr = PIPE, stdin = PIPE)
p.stdin.close()
include_path = p.stderr.read().split('\n')
include_path = [x[1:] for x in include_path if x.startswith(' /usr/include')]
include_path += [libdir, get_python_inc()]
include_path = ";".join(include_path)
libcntcc.tcc_set_emul_lib_path(include_path, libcodenat_path)
def codenat_tcc_init():
global libcntcc
if libcntcc == None:
codenat_tcc_load()
def codenat_tcc_compil(func_name, func_code):
global libcntcc
c = libcntcc.tcc_compil(func_name, func_code)
return c
def codenat_tcc_exec(a):
global libcntcc
oo = libcntcc.tcc_exec_bloc(a)
return oo
def rr():
pass
class tcc_code():
def __init__(self, c):
self.c = c
self.func = lambda :libcntcc.tcc_exec_bloc(self.c)
def gen_C_module_tcc(f_name, c_source):
mcode = codenat_tcc_compil(f_name, c_source)
return tcc_code(mcode)
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