From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Thu, 25 Apr 2019 05:26:23 +0000 (+0000)
Subject: sdk: fix building external modules when CONFIG_STACK_VALIDATION=y
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a9f6fceb4255ba847415cf82035f5fde3dc0ce2a;p=openwrt%2Fstaging%2Fluka.git

sdk: fix building external modules when CONFIG_STACK_VALIDATION=y

The option is at the moment enabled for x86/64.  The selection chain
should be

	config RETPOLINE
	  select STACK_VALIDATION if HAVE_STACK_VALIDATION
	config x86
	  select HAVE_STACK_VALIDATION            if X86_64

cryptdev-linux:

	make[4]: Entering directory '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/cryptodev-linux-cryptodev-linux-1.10'
	make -C /store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/linux-4.14.113 M=/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/cryptodev-linux-cryptodev-linux-1.10 ARCH=x86 CROSS_COMPILE=x86_64-openwrt-linux-musl- modules
	make[5]: Entering directory '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/linux-4.14.113'
	make[6]: *** No rule to make target '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/cryptodev-linux-cryptodev-linux-1.10/ioctl.o', needed by '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/cryptodev-linux-cryptodev-linux-1.10/cryptodev.o'.  Stop.
	Makefile:1533: recipe for target '_module_/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/cryptodev-linux-cryptodev-linux-1.10' failed

Open vSwitch intree kmods

	make[7]: Entering directory '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/openvswitch-2.11.0/datapath/linux'
	make -C /store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/linux-4.14.111 ARCH=x86 M=/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/openvswitch-2.11.0/datapath/linux modules
	make[8]: Entering directory '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/linux-4.14.111'
	make[9]: *** No rule to make target 'tools/objtool/objtool', needed by '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/openvswitch-2.11.0/datapath/linux/actions.o'.  Stop.
	Makefile:1533: recipe for target '_module_/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/openvswitch-2.11.0/datapath/linux' failed
	make[8]: *** [_module_/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/openvswitch-2.11.0/datapath/linux] Error 2
	make[8]: Leaving directory '/store/buildbot/slave/x86_64/build/sdk/build_dir/target-x86_64_musl/linux-x86_64/linux-4.14.111'

Reference: builddeb: include objtool binary in headers package, https://patchwork.kernel.org/patch/9014071/
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
---

diff --git a/target/sdk/Makefile b/target/sdk/Makefile
index 95ac3be197..3b860db93a 100644
--- a/target/sdk/Makefile
+++ b/target/sdk/Makefile
@@ -94,6 +94,14 @@ $(BIN_DIR)/$(SDK_NAME).tar.xz: clean
 	$(TAR) -cf - -C $(TOPDIR) $(KDIR_BASE)/tools/usb/usbip/ | \
 		$(TAR) -xf - -C $(SDK_BUILD_DIR)
 
+	# Copy objtool executables.  They are required for building external
+	# modules if "Compile-time stack metadata validation" is enabled.
+	if grep -q '^CONFIG_STACK_VALIDATION=y' $(LINUX_DIR)/.config; then \
+		$(TAR) -cf - -C $(TOPDIR) \
+				`cd $(TOPDIR); find $(KDIR_BASE)/tools/objtool -type f -executable` | \
+			$(TAR) -xf - -C $(SDK_BUILD_DIR); \
+	fi
+
 	(cd $(SDK_BUILD_DIR); find $(STAGING_SUBDIR_HOST)/bin $(STAGING_SUBDIR_HOST)/usr/bin \
 		$(STAGING_SUBDIR_TOOLCHAIN)/bin $(STAGING_SUBDIR_TOOLCHAIN)/*/bin $(STAGING_SUBDIR_TOOLCHAIN)/libexec \
 		-type f | $(XARGS) $(SCRIPT_DIR)/bundle-libraries.sh $(SDK_BUILD_DIR)/$(STAGING_SUBDIR_HOST))