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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-atom-
     ically, 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	13.0			 July 22, 2021			  FreeBSD 13.0
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO

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