Stop instrumenting KCOV files with kASan and the other way around.
This fixes booting of the setup of using them together.
In theory the checks could be more fine grained, however there is no good
reason (except extra DIAGNISTIC) for running a kernel sanitizer without
kernel coverage.
Patch by <R3x>
for x86 and evbarm:
- install headers and libEGL
- install xorg-server glamoregl component
- link xorg drivers against gbm/egl
bonus fix:
- fix some wrongly marked compatx11file files
build tested on shark, sgimips, evbarm64-el, amd64 and i386.
run tested on radeon, intel and nvidia on amd64, including
'modesetting' driver on amd64. however, my systems disable
it due to llvmpipe so i'm not sure what is happening.
note vax atf fails same as GCC 6. hppa mostly works but has an
atf issue also unrelated to the compiler version
note ia64 mostly builds, but the kernel fails earlier than GCC 6.
- only build clang or clang-tblgen if MKLLVMCMDS != "no"
- move HAVE_MESA_VER earlier so we can detect mesa 18 and enable
MKLLVM on platforms that need it
- move the clang commands and headers into llvmcmds group
- only build the clang specific LLVM libraries if MKLLVMCMDS != "no"
much of this work came from maya@'s github commit
f90685c11d4460d3098fa35f48b58d1893e974e0, reworked for HAVE_MESA_VER
and llvmcmds vs MKCLANG.
build tested on several platforms and on amd64 and i386 with several
different build options (clang build, gcc build, gcc build with llvm
libs).
- add ${X11SRCDIR.MesaLib.old} and introduce ${X11SRCDIR.Mesa} as an
alias for either the former or the non old. this allows many of
the makefiles to simply use ${X11SRCDIR.Mesa} (but does not really
enable much sharing of makefiles, but reduces their diffs.)
- use mesa-which.mk to define ${OLD_PREFIX} to either "" or ".old",
and to know if to build 'dri7' (.old only.) ${OLD_PREFIX} is used
by other code (eg, LIBDPLIBS) to pick the right subdir.
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.
