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#
# Copyright (C) 2021 The Falco Authors.
#
# This file is dual licensed under either the MIT or GPL 2. See
# MIT.txt or GPL.txt for full copies of the license.
#
always-y += probe.o
# kept for compatibility with kernels < 5.11
always = $(always-y)
LLC ?= llc
CLANG ?= clang
KERNELDIR ?= /lib/modules/$(shell uname -r)/build
# DEBUG = -DBPF_DEBUG
all:
$(MAKE) -C $(KERNELDIR) M=$$PWD
clean:
$(MAKE) -C $(KERNELDIR) M=$$PWD clean
@rm -f *~
$(obj)/probe.o: $(src)/probe.c \
$(src)/bpf_helpers.h \
$(src)/filler_helpers.h \
$(src)/fillers.h \
$(src)/maps.h \
$(src)/plumbing_helpers.h \
$(src)/quirks.h \
$(src)/ring_helpers.h \
$(src)/types.h
$(CLANG) $(LINUXINCLUDE) \
$(KBUILD_CPPFLAGS) \
$(KBUILD_EXTRA_CPPFLAGS) \
$(DEBUG) \
-D__KERNEL__ \
-D__BPF_TRACING__ \
-Wno-gnu-variable-sized-type-not-at-end \
-Wno-address-of-packed-member \
-fno-jump-tables \
-fno-stack-protector \
-Wno-tautological-compare \
-O2 -g -emit-llvm -c $< -o $(patsubst %.o,%.ll,$@)
$(LLC) -march=bpf -filetype=obj -o $@ $(patsubst %.o,%.ll,$@)
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