NAME
kvm_read,
kvm_write —
read or write kernel virtual
memory
SYNOPSIS
#include
<kvm.h>
ssize_t
kvm_read(kvm_t
*kd, u_long addr,
void *buf,
size_t nbytes);
ssize_t
kvm_write(kvm_t
*kd, u_long addr,
const void *buf,
size_t nbytes);
DESCRIPTION
Thekvm_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)