asm_hooks.py 文件源码

def mprotect_libc(addr, size, flags):
    libc = ctypes.CDLL(ctypes.util.find_library('libc'), use_errno=True)
    libc.mprotect.argtypes = [c_void_p, c_size_t, c_int]
    libc.mprotect.restype = c_int
    addr_align = addr & ~(PAGE_SIZE - 1)
    mem_end = (addr + size) & ~(PAGE_SIZE - 1)
    if (addr + size) > mem_end:
        mem_end += PAGE_SIZE
    memlen = mem_end - addr_align
    ret = libc.mprotect(addr_align, memlen, flags)
    if ret == -1:
        e = ctypes.get_errno()
        raise OSError(e, errno.errorcodes[e], os.strerror(e))