gnumach4linux-libre/glue/locore.h

extern int copyin (const void *userbuf, void *kernelbuf, size_t cn);
extern int copyinmsg (const void *userbuf, void *kernelbuf, size_t cn);
extern int copyout (const void *kernelbuf, void *userbuf, size_t cn);
extern int copyoutmsg (const void *kernelbuf, void *userbuf, size_t cn);