在Python中调用Linux系统调用PROCESS_VM_READV可以使用ctypes库来实现。ctypes是Python的标准库,用于调用动态链接库中的函数。
首先,需要导入ctypes库,并加载libc动态链接库:
import ctypes
libc = ctypes.CDLL("libc.so.6")
接下来,定义PROCESS_VM_READV的参数类型和返回值类型:
pid_t = ctypes.c_int
struct_iovec = ctypes.Structure # 根据实际情况定义struct_iovec的结构体
ssize_t = ctypes.c_ssize_t
libc.process_vm_readv.argtypes = [pid_t, ctypes.POINTER(struct_iovec), ctypes.c_ulong, ctypes.POINTER(struct_iovec), ctypes.c_ulong, ssize_t]
libc.process_vm_readv.restype = ssize_t
然后,可以调用process_vm_readv函数来实现在Python中调用Linux系统调用PROCESS_VM_READV:
def process_vm_readv(pid, local_iov, remote_iov, flags=0):
return libc.process_vm_readv(pid, local_iov, 1, remote_iov, 1, flags)
其中,pid为目标进程的进程ID,local_iov和remote_iov为struct_iovec结构体数组,用于指定读取和写入的内存地址和长度。
调用示例:
local_iov = struct_iovec()
local_iov.iov_base = ctypes.create_string_buffer(100) # 本地内存地址
local_iov.iov_len = 100 # 读取的长度
remote_iov = struct_iovec()
remote_iov.iov_base = ctypes.c_void_p(0x12345678) # 目标进程内存地址
remote_iov.iov_len = 100 # 读取的长度
pid = 1234 # 目标进程的进程ID
result = process_vm_readv(pid, ctypes.pointer(local_iov), ctypes.pointer(remote_iov))
if result > 0:
data = local_iov.iov_base.raw[:result]
print("Read data:", data)
else:
print("Failed to read memory.")
需要注意的是,调用PROCESS_VM_READV需要具有足够的权限,通常需要以root用户或具有相应权限的用户身份运行。
此外,需要根据实际情况定义struct_iovec的结构体,以适配读取和写入的数据类型和长度。
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