Add tests on the x86 PTEs. We scan the MMU page tables directly and verify
certain properties.

Centralize the base rump libraries into a variable used by all the other
Makefiles so that we can make changes to it centrally as needed and have
less mess. Fixes the sun2 build that needs rumpvfs after librump after
the latest changes.

Re-arrange the ufetchstore tests to look like the other ones.

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

Add KCOV - kernel code coverage tracing device

The KCOV driver implements collection of code coverage inside the kernel.
It can be enabled on a per process basis from userland, allowing the kernel
program counter to be collected during syscalls triggered by the same
process.

The device is oriented towards kernel fuzzers, in particular syzkaller.

Currently the only supported coverage type is -fsanitize-coverage=trace-pc.

The KCOV driver was initially developed in Linux. A driver based on the
same concept was then implemented in FreeBSD and OpenBSD.

Documentation is borrowed from OpenBSD and ATF tests from FreeBSD.

This patch has been prepared by Siddharth Muralee, improved by <maxv>
and polished by myself before importing into the mainline tree.

All ATF tests pass.

PR/53908: Alex Raschi: Test that require modules belong in modules; move the
threadpool test from kernel to modules.

branches: 1.13.2; 1.13.4;
PR 52864: add a test for this bug, from sevan@

Define _KERNTYPES for things that need it.

Fix static linking for the tests: -lrump is also used by -lrumpuser,
so we also need -lrump after -lrumpuser. Fixes build for sun2.

branches: 1.10.2; 1.10.8;
Add a helper program that loads a module and returns the errno from modctl(8).

XXX: As noted on tech-kern@, the syscall should be modified to fail
consistently with a given predefined errno on non-MODULAR kernels.

Add a test to ensure that PAGE_SIZE is available in kernel modules.
This test reproduces the error condition in PR port-macppc/46041 and
therefore it is an xfail in this particular platform.

branches: 1.8.6; 1.8.8;
tests for builtin modules

Fix botched update.

Add a new atf test-case to check that recursive module calls actually work.

Get rid of static Atffiles and let bsd.test.mk generate them on the fly.

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

Convert NetBSD-specific tests that were previously written in C++ to C now
that ATF provides a C-only binding (comes with 0.5).

branches: 1.2.2; 1.2.4;
Add tests for load-time parameter passing to modules, both at the syscall
level through modctl(2) and at the user level through the modload(8)
utility.

branches: 1.1.2;
Add preliminary tests (basically a placeholder for now) for the new modules
framework. At the moment, this just tests for plain load (i.e. no arguments
passed to load) and later unload of the module through the modctl(2) system
call. The tools are not tested yet.