NAME
ufetch, ufetch_8,
ufetch_16, ufetch_32,
ufetch_64, ufetch_char,
ufetch_short, ufetch_int,
ufetch_long, ufetch_ptr
— fetch data from
user-space
SYNOPSIS
#include
<sys/systm.h>
int
ufetch_8(const
uint8_t *uaddr, uint8_t
*valp);
int
ufetch_16(const
uint16_t *uaddr, uint16_t
*valp);
int
ufetch_32(const
uint32_t *uaddr, uint32_t
*valp);
int
ufetch_64(const
uint64_t *uaddr, uint64_t
*valp);
int
ufetch_char(const
unsigned char *uaddr,
unsigned char *valp);
int
ufetch_short(const
unsigned short *uaddr,
unsigned short
*valp);
int
ufetch_int(const
unsigned int *uaddr,
unsigned int *valp);
int
ufetch_long(const
unsigned long *uaddr,
unsigned long *valp);
int
ufetch_ptr(const
void **uaddr, void
**valp);
DESCRIPTION
Theufetch functions provide a way to fetch the values
of single memory cells from user-space. In each case, the value referenced by
the user-space address uaddr is retrieved and stored at
the kernel memory location referenced by valp.
The ufetch_64 function is only available
on systems employing the ‘LP64’ memory model, which can be
determined by testing for the presence of the _LP64
C preprocessor macro.
RETURN VALUES
The ufetch functions return 0 on success
and an error number on failure.