FETCH(9) BSD Kernel Developer's Manual FETCH(9)NAME
fetch, fubyte, fuswintr, fuword, fuword16, fuword32, fuword64 — fetch
data from user-space
SYNOPSIS
#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);
DESCRIPTION
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 con‐
text.
RETURN VALUES
The fetch functions return the data fetched or -1 on failure.
SEE ALSOcopy(9), store(9)BSD October 5, 2009 BSD