STORE(9)               FreeBSD Kernel Developer's Manual              STORE(9)

NAME
     store, subyte, suword - store data to user-space

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

     int
     subyte(volatile void *base, int byte);

     int
     suword(volatile void *base, long word);

     int
     suword16(volatile void *base, int word);

     int
     suword32(volatile void *base, int32_t word);

     int
     suword64(volatile void *base, int64_t word);

DESCRIPTION
     The store functions are designed to copy small amounts of data to user-
     space.  If the user address is naturally aligned, then the operation will
     be performed atomically.  Otherwise it may fail or be performed non-
     atomically, depending on the platform.

     The store routines provide the following functionality:

     subyte()    Stores a byte of data to the user-space address base.

     suword()    Stores a word of data to the user-space address base.

     suword16()  Stores 16 bits of data to the user-space address base.

     suword32()  Stores 32 bits of data to the user-space address base.

     suword64()  Stores 64 bits of data to the user-space address base.

RETURN VALUES
     The store functions return 0 on success or -1 on failure.

SEE ALSO
     copy(9), fetch(9)

FreeBSD 13.1-RELEASE-p6          July 22, 2021         FreeBSD 13.1-RELEASE-p6