NAME
kvm_read,
kvm_write —
read or write kernel virtual memory
LIBRARY
Kernel Data Access Library (libkvm, -lkvm)
SYNOPSIS
#include <kvm.h>
ssize_t
kvm_read(
kvm_t
*kd,
unsigned long
addr,
void *buf,
size_t nbytes);
ssize_t
kvm_write(
kvm_t
*kd,
unsigned long
addr,
const void
*buf,
size_t nbytes);
DESCRIPTION
The
kvm_read() and
kvm_write() functions are
used to read and write kernel virtual memory (or a crash dump file). See
kvm_open(
3) or
kvm_openfiles(
3) for information
regarding opening kernel virtual memory and crash dumps.
The
kvm_read() function transfers
nbytes
bytes of data from the kernel space address
addr to
buf. Conversely,
kvm_write() transfers
data from
buf to
addr. Unlike
their SunOS counterparts, these functions cannot be used to read or write
process address spaces.
RETURN VALUES
Upon success, the number of bytes actually transferred is returned. Otherwise,
-1 is returned.
SEE ALSO
kvm(3),
kvm_close(3),
kvm_getargv(3),
kvm_getenvv(3),
kvm_geterr(3),
kvm_getprocs(3),
kvm_nlist(3),
kvm_open(3),
kvm_openfiles(3)