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FETCH(9) | Kernel Developer's Manual | FETCH(9) |
NAME¶
fetch, fubyte, fuswintr, fuword, fuword16, fuword32, fuword64 — fetch data from user-spaceSYNOPSIS¶
#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)October 5, 2009 | Debian |