DragonFly On-Line Manual Pages
FETCH(9) DragonFly Kernel Developer's Manual FETCH(9)
NAME
fetch, fubyte, fuword32, fuword64 -- fetch data from user-space
SYNOPSIS
#include <sys/types.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
int
fubyte(const uint8_t *base);
int32_t
fuword32(const uint32_t *base);
int64_t
fuword64(const uint64_t *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.
fuword32() Fetches 32 bits of data from the user-space address base.
fuword64() Fetches 64 bits of data from the user-space address base.
RETURN VALUES
The fetch functions return the data fetched or -1 on failure.
SEE ALSO
copy(9), store(9)
DragonFly 5.3 January 26, 2017 DragonFly 5.3