104 lines
3.0 KiB
Makefile
104 lines
3.0 KiB
Makefile
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
|
|
OUTPUT := .output
|
|
CLANG ?= clang
|
|
LLVM_STRIP ?= llvm-strip
|
|
SHELL := /bin/bash
|
|
LIBLOG_OBJ := $(abspath $(OUTPUT)/liblog.o)
|
|
LIBLOG_SRC := $(abspath ./includes/liblog/src/log.c)
|
|
LIBLOG_HDR := $(abspath ./includes/liblog/src/)
|
|
INC := $(abspath ./includes/)
|
|
BPFTOOL := sudo bpftool
|
|
ARCH := $(shell uname -m | sed 's/x86_64/x86/' | sed 's/aarch64/arm64/' | sed 's/ppc64le/powerpc/' | sed 's/mips.*/mips/')
|
|
INCLUDES := -I$(OUTPUT) -I$(LIBLOG_HDR) -I$(INC)
|
|
CFLAGS := -g -Wall -DLOG_USE_COLOR
|
|
ALL_LDFLAGS := $(LDFLAGS) $(EXTRA_LDFLAGS)
|
|
|
|
APPS = netcat_ebpf_demo
|
|
SOURCES := $(filter-out src/$(APPS).c,$(wildcard src/*.c))
|
|
|
|
ALL_LDFLAGS += -lrt -ldl -lpthread -lm -lbpf -lelf -lz
|
|
|
|
# Get Clang's default includes on this system. We'll explicitly add these dirs
|
|
# to the includes list when compiling with `-target bpf` because otherwise some
|
|
# architecture-specific dirs will be "missing" on some architectures/distros -
|
|
# headers such as asm/types.h, asm/byteorder.h, asm/socket.h, asm/sockios.h,
|
|
# sys/cdefs.h etc. might be missing.
|
|
#
|
|
# Use '-idirafter': Don't interfere with include mechanics except where the
|
|
# build would have failed anyways.
|
|
CLANG_BPF_SYS_INCLUDES = $(shell $(CLANG) -v -E - </dev/null 2>&1 \
|
|
| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
|
|
|
|
ifeq ($(V),1)
|
|
Q =
|
|
msg =
|
|
else
|
|
Q = @
|
|
msg = @printf ' %-8s %s%s\n' \
|
|
"$(1)" \
|
|
"$(patsubst $(abspath $(OUTPUT))/%,%,$(2))" \
|
|
"$(if $(3), $(3))";
|
|
MAKEFLAGS += --no-print-directory
|
|
endif
|
|
|
|
define allow-override
|
|
$(if $(or $(findstring environment,$(origin $(1))),\
|
|
$(findstring command line,$(origin $(1)))),,\
|
|
$(eval $(1) = $(2)))
|
|
endef
|
|
|
|
$(call allow-override,CC,$(CROSS_COMPILE)cc)
|
|
$(call allow-override,LD,$(CROSS_COMPILE)ld)
|
|
|
|
.PHONY: all
|
|
all: $(APPS)
|
|
|
|
.PHONY: clean
|
|
clean:
|
|
$(call msg,CLEAN)
|
|
$(Q)rm -rf $(OUTPUT) $(APPS)
|
|
|
|
clean-app:
|
|
$(call msg,CLEAN-APP)
|
|
$(Q)rm -rf $(APPS)
|
|
$(Q)rm -rf $(OUTPUT)/*.skel.h
|
|
$(Q)rm -rf $(OUTPUT)/*.o
|
|
|
|
$(OUTPUT):
|
|
$(call msg,MKDIR,$@)
|
|
$(Q)mkdir -p $@
|
|
|
|
# Build liblog
|
|
$(LIBLOG_OBJ):
|
|
$(call msg,LIBLOG,$@)
|
|
$(Q)$(CC) $(CFLAGS) $(INCLUDES) -c $(LIBLOG_SRC) -o $@
|
|
|
|
# Build BPF code
|
|
$(OUTPUT)/%.bpf.o: src/ebpf/%.bpf.c $(wildcard src/ebpf/%.h) $(VMLINUX) | $(OUTPUT)
|
|
$(call msg,BPF,$@)
|
|
$(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(ARCH) $(INCLUDES) $(CLANG_BPF_SYS_INCLUDES) -c $(filter %.c,$^) -o $@
|
|
$(Q)$(LLVM_STRIP) -g $@ # strip useless DWARF info
|
|
|
|
# Generate BPF skeletons
|
|
$(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(OUTPUT)
|
|
$(call msg,GEN-SKEL,$@)
|
|
$(Q)$(BPFTOOL) gen skeleton $< > $@
|
|
|
|
# Build user-space code
|
|
$(patsubst %,$(OUTPUT)/%.o,$(APPS)): %.o: %.skel.h
|
|
|
|
$(OUTPUT)/%.o: src/%.c $(wildcard %.h) | $(OUTPUT)
|
|
$(call msg,CC,$@)
|
|
$(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(INCLUDES) -o $@
|
|
|
|
# Build application binary
|
|
$(APPS): %: $(OUTPUT)/%.o $(LIBLOG_OBJ) | $(OUTPUT)
|
|
$(call msg,BINARY,$@)
|
|
$(Q)$(CC) $(CFLAGS) $(SOURCES) $^ $(ALL_LDFLAGS) -o $@
|
|
|
|
# delete failed targets
|
|
.DELETE_ON_ERROR:
|
|
|
|
# keep intermediate (.skel.h, .bpf.o, etc) targets
|
|
.SECONDARY:
|