Add logic to aid in the in-kernel build

In the in-kernel build, Kbuild replaces autotools
for the user space part. Add some makefile snippets
and a script used to aid in that setup.
Not used by the github version at the moment.

Change-Id: Id2d9508cdabf0da2b9efcec0a0fca99ada90922b
Signed-off-by: Knut Omang <knut.omang@oracle.com>
Reviewed-on: https://review.no.oracle.com:8443/c/ktf/+/16363
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>

.gitignore

@@ -12,5 +12,4 @@ libtool
 *.cmd
 *.o
 *.ko
-*.mk
 *.xml

scripts/ktf_syms.mk

@@ -0,0 +1,16 @@
+ktf_symfile=$(shell (cd $(srctree)/$(src) && ls ktf_syms.txt 2> /dev/null || true))
+ktf_syms = $(ktf_symfile:%.txt=%.h)
+
+ifneq ($(ktf_symfile),)
+
+$(obj)/self.o: $(obj)/$(ktf_syms)
+
+ktf_scripts = $(srctree)/$(src)/../scripts
+
+$(obj)/$(ktf_syms): $(srctree)/$(src)/ktf_syms.txt $(ktf_scripts)/resolve
+	@echo "  KTFSYMS $@"
+	$(Q)$(ktf_scripts)/resolve $(ccflags-y) $< $@
+
+clean-files += $(ktf_syms)
+
+endif

scripts/runtests.mk

@@ -0,0 +1,3 @@
+TEST_PROGS := scripts/runtests.sh
+
+include ../lib.mk

scripts/runtests.sh

@@ -0,0 +1,100 @@
+#!/bin/bash -e
+
+verbose=1
+
+# Convenience function to return a string that
+# is a reverse list of the incoming arguments:
+#
+reverse()
+{
+    args=($*)
+    for (( i=((${#args[*]} - 1)); i >= 0; i-- )); do
+	echo ${args[$i]}
+    done
+}
+
+# Set paths to a particular module - if no path is set to a module, use modprobe:
+#
+declare -A a_mpath
+mpath()
+{
+    local module="$1"
+    local mpath="$2"
+    [[ $mpath != "" ]] || fail "Usage: mpath module path"
+
+    a_mpath[$module]="$BUILD/$mpath"
+}
+
+# Set parameters to load a given module with for test purposes:
+declare -A a_params
+params()
+{
+    local module="$1"
+    shift
+    a_params[$module]="$*"
+}
+
+log()
+{
+    (( $verbose )) && echo $*
+}
+
+mod_probe()
+{
+    local fm=""
+    local name="$1"
+    shift
+
+    mp=${a_mpath[$name]}
+    if [[ $mp != "" ]]; then
+	fm="$mp"
+    fi
+
+    is_loaded=$(lsmod | egrep "^$name" || true)
+    if [[ $is_loaded != "" ]]; then
+	echo "Module \"$name\" is already loaded!" 1>&2
+	return 0
+    fi
+
+    if [[ $fm == "" ]]; then
+	log "Modprobing $name"
+	$sudo modprobe $name ${a_params[$name]}
+    else
+	fm=${a_mpath[$name]}
+        log "Insmod'ing module \"$name\"" 1>&2
+	$sudo insmod $fm ${a_params[$name]}
+    fi
+}
+
+# If/when more modules are to be loaded, this could go in a config file
+# but for the purpose of this example, just do it inline:
+#
+mpath ktf 	ktf/kernel/ktf.ko
+mpath selftest	ktf/selftest/selftest.ko
+
+load_modules="ktf selftest"
+
+unload_modules=$(reverse $load_modules)
+
+sudo=""
+if [[ $USER != "root" ]]; then
+    sudo="sudo"
+fi
+
+for m in $load_modules; do
+    mod_probe $m
+done
+
+if [[ $GTEST_PATH == "" ]];then
+    echo "Set environment variable GTEST_PATH to point to your googletest build!"
+    exit 1
+fi
+
+export LD_LIBRARY_PATH="$BUILD/ktf/lib:$GTEST_PATH/lib64:$GTEST_PATH/lib"
+$BUILD/ktf/user/ktftest || stat=$?
+
+for m in $unload_modules; do
+    $sudo rmmod $m
+done
+
+exit $stat

scripts/top_make.mk

@@ -0,0 +1,14 @@
+ifneq ($(TARGETS),)
+# We end up here if called from selftests/Makefile
+# Invoke our "module target" to get everything built
+all:
+	$(Q)$(MAKE) -C $(abs_objtree) M=tools/testing/selftests/ktf
+
+clean:
+	$(Q)$(MAKE) -C $(abs_objtree) M=tools/testing/selftests/ktf clean
+
+run_tests:
+	@echo "running tests"
+	$(MAKE) BUILD=$(abs_objtree)/tools/testing/selftests -f scripts/runtests.mk $@
+
+endif