94 lines
2.6 KiB
Makefile
94 lines
2.6 KiB
Makefile
|
# SPDX-License-Identifier: GPL-2.0
|
||
|
|
OUTPUT := .output
|
||
|
|
abs_out := $(abspath $(OUTPUT))
|
||
|
|
|
||
|
|
CLANG ?= clang
|
||
|
|
LLC ?= llc
|
||
|
|
LLVM_STRIP ?= llvm-strip
|
||
|
|
|
||
|
|
TOOLS_PATH := $(abspath ../../../../tools)
|
||
|
|
BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool
|
||
|
|
BPFTOOL_OUTPUT := $(abs_out)/bpftool
|
||
|
|
DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
|
||
|
|
BPFTOOL ?= $(DEFAULT_BPFTOOL)
|
||
|
|
|
||
|
|
LIBBPF_SRC := $(TOOLS_PATH)/lib/bpf
|
||
|
|
LIBBPF_OUTPUT := $(abs_out)/libbpf
|
||
|
|
LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
|
||
|
|
LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include
|
||
|
|
BPFOBJ := $(LIBBPF_OUTPUT)/libbpf.a
|
||
|
|
|
||
|
|
INCLUDES := -I$(OUTPUT) -I$(LIBBPF_INCLUDE) -I$(TOOLS_PATH)/include/uapi
|
||
|
|
CFLAGS := -g -Wall
|
||
|
|
|
||
|
|
VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \
|
||
|
|
$(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \
|
||
|
|
../../../../vmlinux \
|
||
|
|
/sys/kernel/btf/vmlinux \
|
||
|
|
/boot/vmlinux-$(shell uname -r)
|
||
|
|
VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
|
||
|
|
ifeq ($(VMLINUX_BTF),)
|
||
|
|
$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
|
||
|
|
endif
|
||
|
|
|
||
|
|
ifeq ($(V),1)
|
||
|
|
Q =
|
||
|
|
msg =
|
||
|
|
else
|
||
|
|
Q = @
|
||
|
|
msg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
|
||
|
|
MAKEFLAGS += --no-print-directory
|
||
|
|
submake_extras := feature_display=0
|
||
|
|
endif
|
||
|
|
|
||
|
|
.DELETE_ON_ERROR:
|
||
|
|
|
||
|
|
.PHONY: all clean
|
||
|
|
|
||
|
|
all: entrypoints.lskel.h
|
||
|
|
|
||
|
|
clean:
|
||
|
|
$(call msg,CLEAN)
|
||
|
|
$(Q)rm -rf $(OUTPUT) entrypoints
|
||
|
|
|
||
|
|
entrypoints.lskel.h: $(OUTPUT)/entrypoints.bpf.o | $(BPFTOOL)
|
||
|
|
$(call msg,GEN-SKEL,$@)
|
||
|
|
$(Q)$(BPFTOOL) gen skeleton -L $< > $@
|
||
|
|
|
||
|
|
|
||
|
|
$(OUTPUT)/entrypoints.bpf.o: entrypoints.bpf.c $(OUTPUT)/vmlinux.h $(BPFOBJ) | $(OUTPUT)
|
||
|
|
$(call msg,BPF,$@)
|
||
|
|
$(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \
|
||
|
|
-c $(filter %.c,$^) -o $@ && \
|
||
|
|
$(LLVM_STRIP) -g $@
|
||
|
|
|
||
|
|
$(OUTPUT)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
|
||
|
|
ifeq ($(VMLINUX_H),)
|
||
|
|
$(call msg,GEN,,$@)
|
||
|
|
$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
|
||
|
|
else
|
||
|
|
$(call msg,CP,,$@)
|
||
|
|
$(Q)cp "$(VMLINUX_H)" $@
|
||
|
|
endif
|
||
|
|
|
||
|
|
$(OUTPUT) $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
|
||
|
|
$(call msg,MKDIR,$@)
|
||
|
|
$(Q)mkdir -p $@
|
||
|
|
|
||
|
|
$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
|
||
|
|
$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) \
|
||
|
|
OUTPUT=$(abspath $(dir $@))/ prefix= \
|
||
|
|
DESTDIR=$(LIBBPF_DESTDIR) $(abspath $@) install_headers
|
||
|
|
|
||
|
|
ifeq ($(CROSS_COMPILE),)
|
||
|
|
$(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BPFTOOL_OUTPUT)
|
||
|
|
$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC) \
|
||
|
|
OUTPUT=$(BPFTOOL_OUTPUT)/ \
|
||
|
|
LIBBPF_BOOTSTRAP_OUTPUT=$(LIBBPF_OUTPUT)/ \
|
||
|
|
LIBBPF_BOOTSTRAP_DESTDIR=$(LIBBPF_DESTDIR)/ bootstrap
|
||
|
|
else
|
||
|
|
$(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
|
||
|
|
$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC) \
|
||
|
|
OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
|
||
|
|
endif
|