def add_offset(self, intval):
newoffset = self.offset.add(SV.SimDoubleWordValue(intval))
return SimBaseAddress(self.base, newoffset, buffersize=self.buffersize)
def set_image_base(self, value):
self.imagebase = SSV.SimGlobalAddress(
SV.SimDoubleWordValue(int(value, 16)))
def add_offset(self, intval):
newoffset = self.offset.add(SV.SimDoubleWordValue(intval))
return SimStackAddress(newoffset)
def __init__(
self,
app,
basename, # name of executable
imagebase, # base address of the image (hex)
startaddr, # address to start simulation (hex)
bigendian=False,
simsupport=BMS.BaseMIPSimSupport(
'0x0'), # support class with custom initialization and stubs
baseaddress=0, # load address, to be added to imagebase
libapp=None, # library to statically include functions from
xapp=None): # target executable for dynamic loading
self.app = app
self.basename = basename
self.baseaddress = baseaddress
self.bigendian = bigendian
self.simsupport = simsupport
# context
self.imagebase = SSV.mk_global_address(int(imagebase, 16))
self.context = FunctionContext(self, app)
self.programcounter = SSV.mk_global_address(int(startaddr,
16)) # SimAddress
self.delayed_programcounter = None # SimAddress
# registers and memory
self.registers = {} # register name -> SimValue
self.registers['zero'] = SV.SimDoubleWordValue(0)
self.stackmem = MM.MIPSimStackMemory(self)
self.globalmem = MM.MIPSimGlobalMemory(self, self.app)
self.basemem = {} # base -> MM.MIPSimBaseMemory
# static library (optional)
self.libapp = libapp
if self.libapp:
self.libstubs = {} # int (int-address) -> (name,stub)
self.libglobalmem = MM.MIPSimGlobalMemory(self, libapp)
self.static_lib = {
} # function-name -> function address in static lib
libimgbase = self.libapp.get_elf_header().get_image_base()
self.libimagebase = SSV.SimGlobalAddress(
SV.SimDoubleWordValue(int(libimgbase, 16)))
self.instaticlib = False
# target executable for dynamic loading (optional)
self.xapp = xapp
if self.xapp:
self.xglobalmem = MM.MIPSimGlobalMemory(self, xapp)
# log
self.fnlog = {} # iaddr -> msg list2
# environment
self.environment = {} # string -> string
self.nvram = {} # string -> string ; non-volatile ram default values
self.network_input = {} # string -> f() -> string
# library/application function stubs
self.stubs = {} # int (int-address) -> (name,stub)
self.appstubs = {} # int (int-address) -> (name,stub)
self.dlstubs = {} # name -> stub ; dynamically linked symbols
# libc functions implemented by tables
self.ctype_toupper = None
self.ctype_b = None
self._initialize()
self.function_start_initialization()
self.push_context(startaddr)