fetch, fubyte,

#include <sys/types.h>
#include <sys/time.h>
#include <sys/systm.h>

int
fubyte(const void *base);

long
fuword(const void *base);

int
fuword16(void *base);

int32_t
fuword32(const void *base);

int64_t
fuword64(const void *base);

#include <sys/resourcevar.h>

int
fuswintr(void *base);

The fetch functions are designed to copy small amounts of data from user-space.

The fetch routines provide the following functionality:

fubyte()

Fetches a byte of data from the user-space address base.

fuword()

Fetches a word of data from the user-space address base.

fuword16()

Fetches 16 bits of data from the user-space address base.

fuword32()

Fetches 32 bits of data from the user-space address base.

fuword64()

Fetches 64 bits of data from the user-space address base.

fuswintr()

Fetches a short word of data from the user-space address base. This function is safe to call during an interrupt context.

The fetch functions return the data fetched or -1 on failure.

copy(9), store(9)