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RUMP(3) NetBSD Library Functions Manual RUMP(3)
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rump -- Runnable Userspace Meta Program kernel
rump Library (librump, -lrump)
rump emulates portions of the kernel in order to be able to run kernel
code from a userspace application. For most parts kernel code is
directly used, but in some cases such as with vm and device drivers a
reimplementation suitable for userspace is provided. All of the routines
in rump have been compiled in the kernel namespace with -D_KERNEL.
Although rump includes many kernel routines directly, userspace applica-
tions should not attempt to include NetBSD system headers and call kernel
functions directly. Instead, rump routines should be called. In case
applications attempt to include <sys> headers from the NetBSD tree, col-
lisions will result on other platforms.
Three classes of routines are provided by rump:
These routines have been handwritten for rump operation. Some
are useful purely for rump, while others are merely interfaces
to existing kernel routines. An example of the former is
rump_fakeblk_register(), while an example of the latter class
The routines available in this class can be found from the
It is possible to execute certain system calls from rump.
However, contrary to real system calls, the kernel is never
entered, but the system call backend code compiled into rump
is merely called as a direct function call.
The autogenerated list of system calls currently available in
rump can be found from the header <rump_syscalls.h>.
To sort out namespace collisions for non-NetBSD platforms, the
whole vnode interface set is provided under a special names-
pace. The operation is the same as in the kernel, but the
interface names begin with the prefix RUMP_VOP.
This class of routines is available from the autogenerated
Before use rump must be initialized by calling rump_init().
p2k(3), rumpuser(3), ukfs(3)
rump first appeared in NetBSD 5.0.
Antti Kantee <firstname.lastname@example.org>
rump is highly experimental and may change in header location, library
name, API and/or ABI without warning.
NetBSD 5.0 July 28, 2008 NetBSD 5.0