1 files changed, 59 insertions, 0 deletions
diff --git a/src/bpfswitch/ksrc/Makefile b/src/bpfswitch/ksrc/Makefile
new file mode 100644
index 00000000..64bec2f8
--- /dev/null
+++ b/src/bpfswitch/ksrc/Makefile
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: GPL-2.0
+
+include ../config.mk
+
+ifneq (,$(BUILDDIR))
+OBJDIR = $(BUILDDIR)/ksrc/obj/
+else
+OBJDIR = obj/
+endif
+
+MODS += $(OBJDIR)xdp_l2fwd.o
+MODS += $(OBJDIR)xdp_dummy.o
+
+VPATH := .
+
+# rule is based on samples/bpf/Makefile
+DEFS = -D__KERNEL__ -D__BPF_TRACING__  -D__TARGET_ARCH_x86 $(EXTRA_DEFS)
+
+CFLAGS += -Wno-unused-value -Wno-pointer-sign
+CFLAGS += -Wno-compare-distinct-pointer-types
+CFLAGS += -Wno-gnu-variable-sized-type-not-at-end
+CFLAGS += -Wno-address-of-packed-member
+CFLAGS += -Wno-tautological-compare
+CFLAGS += -Wno-unknown-warning-option
+CFLAGS += -fno-stack-protector
+
+INCLUDES  = -I../include
+INCLUDES += -I$(KSRC)/arch/x86/include
+INCLUDES += -I$(KBLD)/arch/x86/include/generated
+INCLUDES += -I$(KBLD)/include
+INCLUDES += -I$(KSRC)/include
+INCLUDES += -I$(KSRC)/arch/x86/include/uapi
+INCLUDES += -I$(KBLD)/arch/x86/include/generated/uapi
+INCLUDES += -I$(KSRC)/include/uapi
+INCLUDES += -I$(KBLD)/include/generated/uapi
+
+SINCLUDES  = -include $(KSRC)/include/linux/kconfig.h
+SINCLUDES += -include include/asm_goto_workaround.h
+
+# this is to find stdarg.h. Ubuntu has this under x86_64-linux-gnu
+# and Fedora is under x86_64-redhat-linux. Let's try 'find'.
+GCCVER=$(shell gcc -v 2>&1 | awk '{if ($$0 ~ /gcc version/) {ver=split($$3,n,"."); print n[1]}}')
+GCC_INC=$(shell find /usr/lib/gcc/x86_64-*linux*/$(GCCVER) -name include)
+NOSTDINC_FLAGS = -nostdinc -isystem $(GCC_INC)
+
+all: build $(MODS)
+
+build:
+	@mkdir -p $(OBJDIR)
+
+$(OBJDIR)%.o: %.c
+	$(QUIET_CLANG)$(CLANG) $(NOSTDINC_FLAGS) $(INCLUDES) \
+		$(SINCLUDES) $(DEFS) $(CFLAGS) \
+		-O2 -emit-llvm $(CLANG_FLAGS) -c $< -o $@.cl
+	$(QUIET_LLC)$(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ $@.cl
+	@rm $@.cl
+
+clean:
+	@rm -rf $(OBJDIR)