mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
56 lines
2.1 KiB
Groff
56 lines
2.1 KiB
Groff
.\"
|
|
.\" Copyright (c) 2020 Leandro Lupori <luporl@FreeBSD.org>
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.Dd February 5, 2020
|
|
.Dt KVM_KERNDISP 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm kvm_kerndisp
|
|
.Nd get kernel displacement
|
|
.Sh LIBRARY
|
|
.Lb libkvm
|
|
.Sh SYNOPSIS
|
|
.In kvm.h
|
|
.Ft kssize_t
|
|
.Fn kvm_kerndisp "kvm_t *kd"
|
|
.Sh DESCRIPTION
|
|
.Fn kvm_kerndisp
|
|
returns the number of bytes by which the kernel referenced by
|
|
.Fa kd
|
|
is displaced.
|
|
This is the difference between the kernel's base virtual address at run time
|
|
and the kernel base virtual address specified in the kernel image file.
|
|
.Pp
|
|
Note that if the kernel is moved to a lower memory address,
|
|
the displacement will be negative.
|
|
.Sh RETURN VALUES
|
|
.Fn kvm_kerndisp
|
|
returns the number of bytes by which the kernel is displaced.
|
|
If the kernel is not displaced or if it is not possible to find the
|
|
displacement then 0 is returned.
|
|
.Sh SEE ALSO
|
|
.Xr kvm 3 ,
|
|
.Xr kvm_close 3 ,
|
|
.Xr kvm_open 3
|