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 context.

RETURN VALUES

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

SEE ALSO

     copy(9), store(9)

BSD
								  October 5, 2009							       BSD