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Command: suword64 | Section: 9 | Source: FreeBSD | File: suword64.9.gz
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 14.1-RELEASE-p8 July 22, 2021 FreeBSD 14.1-RELEASE-p8