On 01.10.2020 16:53, Bruce Ashfield wrote:
On Thu, Oct 1, 2020 at 10:47 AM Vyacheslav Yurkov <[email protected]> wrote:
On 01.10.2020 16:36, Bruce Ashfield wrote:
We already ran into this with the main kernel flags, and we don't want
to duplicate them here.
Why aren't what we have in kernel.bbclass working in your scenario ?
Bruce
Because kernel.bbclass is not pulled in into the environment of
out-of-tree module recipe. Should it be?
This can easily be checked when you do 'bitbake hello-mod -c devshell'
and examine $EXTRA_OEMAKE variable.
Yes, it should be.
We build out of tree modules in each autobuilder test run, so it is
functional for the most part. I'd be interested to see the reproducing
kernel module and build steps, so they can be built into the tests to
catch this.
But we absolutely do not want to duplicate those flags into this class.
So with a reproducer, we can perhaps shuffle things around and make
sure that both this new case and the old ones continue to work.
Bruce
That's interesting to know. It has been easy to reproduce in 4.x kernel,
but with 5.x in master it fails silently. So here's what you do with 5.x
and meta-skeleton/recipes-kernel/hello-mod/hello-mod_0.1.bb module
1. Set machine to any x86, e.g. qemux86-64
2. Enable CONFIG_UNWINDER_ORC in the kernel configuration
3. Modify kernel Makefile as follows:
Vyacheslav, [01.10.20 17:01]
index 8b1d5b9017a5..e35da9f9bb75 100644
--- a/Makefile
+++ b/Makefile
@@ -1058,7 +1058,9 @@ ifdef CONFIG_STACK_VALIDATION
echo "int main() {}" | $(HOSTCC) -xc -o /dev/null
$(HOST_LIBELF_LIBS) -,1,0)
ifeq ($(has_libelf),1)
objtool_target := tools/objtool FORCE
+ $(info "Validation enabled")
else
+ $(info "Check failed, disabling stack validation")
SKIP_STACK_VALIDATION := 1
export SKIP_STACK_VALIDATION
endif
4. If HOSTCC is set properly, then you should see "Validation enabled"
in log.do_compile of hello-mod recipe.
Any hints where autobuilder tests are? Perhaps I could take a look and
find a way to cover this...
Vyacheslav
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