fetch9
Fetch data from user-space
Usage
#include <sys/types.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
int
fubyte(const user_addr_t addr);
int
fuibyte(const user_addr_t addr);
int
fuiword(user_addr_t addr);
int64_t
fulong(user_addr_t addr);
uint64_t
fuulong(user_addr_t addr);
int
fuword(user_addr_t addr);
Overview
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 addr.
fuibyte()-
Fetches a byte of data from the user-space address addr. This function is safe to call during an interrupt context.
fuiword()-
Fetches a word of data from the user-space address addr. This function is safe to call during an interrupt context.
fulong()-
Fetches a long word of data from the user-space address addr.
fuulong()-
Fetches a unsigned long word of data from the user-space address addr.
fuword()-
Fetches a word of data from the user-space address addr.
Return values
The fetch functions return the data fetched or -1 on failure.
Releases
147 releases since Mac OS X 10.2; the text changed 2 times.