Files
manticore/core/mappings.py
T
2017-02-13 12:04:15 -05:00

58 lines
1.6 KiB
Python

import sys
import ctypes
import mmap as MMAP
mmap_function = None
munmap_function = None
#initialize glogal functions depeding on platform
osname = sys.platform.lower()
if osname == "darwin" or osname.startswith("linux"):
if osname == "darwin":
libc = ctypes.cdll.LoadLibrary("libc.dylib")
else:
libc = ctypes.cdll.LoadLibrary("libc.so.6")
# void* mmap(void* addr, size_t len, int prot, int flags, int fd, off_t offset)
mmap_function = libc.mmap
mmap_function.restype = ctypes.c_void_p
mmap_function.argtype = [ctypes.c_void_p, ctypes.c_size_t,
ctypes.c_int, ctypes.c_int, ctypes.c_int, ctypes.c_size_t]
# int munmap(void* addr, size_t len)
munmap_function = libc.munmap
munmap_function.restype = ctypes.c_int
munmap_function.argtype = [ctypes.c_void_p, ctypes.c_size_t]
def _munmap(address,size):
result = munmap_function(address, size)
assert result == 0
def _mmap(fd, offset, size):
prot = MMAP.PROT_READ | MMAP.PROT_WRITE
flags = MMAP.MAP_PRIVATE
if size &0xfff !=0:
size = (size & ~0xfff) + 0x1000
assert size > 0
result = mmap_function(0, size, prot, flags, fd, offset)
return ctypes.cast(result, ctypes.POINTER(ctypes.c_char))
mmap = _mmap
munmap = _munmap
elif osname == "win32":
def _mmap(fd, offset, size):
return MMAP.mmap(fd, size, offset=offset, access=MMAP.ACCESS_COPY)
def _munmap(address, size):
pass
mmap = _mmap
munmap = _munmap
else:
raise ValueError("Unsupported host OS: " + osname)