Hello @chuanlin,
ipc_os_get_remote_shm is from ipc-os.h, depends on the os you use it can be ipc-os-baremetal.c/ipc-os-free.c/...
In those .c file, the function ipc_os_get_remote_shm will return remote address which is stored in a global struct in os files.
The global struct is initialized when ipc_shm_init() finished to initialize that instance
Best regards,
Dan