1*4882a593Smuzhiyun# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) 2*4882a593SmuzhiyunOUTPUT := .output 3*4882a593SmuzhiyunCLANG ?= clang 4*4882a593SmuzhiyunLLC ?= llc 5*4882a593SmuzhiyunLLVM_STRIP ?= llvm-strip 6*4882a593SmuzhiyunDEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool 7*4882a593SmuzhiyunBPFTOOL ?= $(DEFAULT_BPFTOOL) 8*4882a593SmuzhiyunLIBBPF_SRC := $(abspath ../../lib/bpf) 9*4882a593SmuzhiyunBPFOBJ := $(OUTPUT)/libbpf.a 10*4882a593SmuzhiyunBPF_INCLUDE := $(OUTPUT) 11*4882a593SmuzhiyunINCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../lib) \ 12*4882a593Smuzhiyun -I$(abspath ../../include/uapi) 13*4882a593SmuzhiyunCFLAGS := -g -Wall 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun# Try to detect best kernel BTF source 16*4882a593SmuzhiyunKERNEL_REL := $(shell uname -r) 17*4882a593SmuzhiyunVMLINUX_BTF_PATHS := /sys/kernel/btf/vmlinux /boot/vmlinux-$(KERNEL_REL) 18*4882a593SmuzhiyunVMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firstword \ 19*4882a593Smuzhiyun $(wildcard $(VMLINUX_BTF_PATHS)))) 20*4882a593Smuzhiyun 21*4882a593Smuzhiyunabs_out := $(abspath $(OUTPUT)) 22*4882a593Smuzhiyunifeq ($(V),1) 23*4882a593SmuzhiyunQ = 24*4882a593Smuzhiyunmsg = 25*4882a593Smuzhiyunelse 26*4882a593SmuzhiyunQ = @ 27*4882a593Smuzhiyunmsg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))"; 28*4882a593SmuzhiyunMAKEFLAGS += --no-print-directory 29*4882a593Smuzhiyunsubmake_extras := feature_display=0 30*4882a593Smuzhiyunendif 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun.DELETE_ON_ERROR: 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun.PHONY: all clean runqslower 35*4882a593Smuzhiyunall: runqslower 36*4882a593Smuzhiyun 37*4882a593Smuzhiyunrunqslower: $(OUTPUT)/runqslower 38*4882a593Smuzhiyun 39*4882a593Smuzhiyunclean: 40*4882a593Smuzhiyun $(call msg,CLEAN) 41*4882a593Smuzhiyun $(Q)rm -rf $(OUTPUT) runqslower 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun$(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ) 44*4882a593Smuzhiyun $(call msg,BINARY,$@) 45*4882a593Smuzhiyun $(Q)$(CC) $(CFLAGS) $^ -lelf -lz -o $@ 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun$(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT)/runqslower.skel.h \ 48*4882a593Smuzhiyun $(OUTPUT)/runqslower.bpf.o 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun$(OUTPUT)/runqslower.bpf.o: $(OUTPUT)/vmlinux.h runqslower.h 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun$(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL) 53*4882a593Smuzhiyun $(call msg,GEN-SKEL,$@) 54*4882a593Smuzhiyun $(Q)$(BPFTOOL) gen skeleton $< > $@ 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun$(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT) 57*4882a593Smuzhiyun $(call msg,BPF,$@) 58*4882a593Smuzhiyun $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \ 59*4882a593Smuzhiyun -c $(filter %.c,$^) -o $@ && \ 60*4882a593Smuzhiyun $(LLVM_STRIP) -g $@ 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun$(OUTPUT)/%.o: %.c | $(OUTPUT) 63*4882a593Smuzhiyun $(call msg,CC,$@) 64*4882a593Smuzhiyun $(Q)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@ 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun$(OUTPUT): 67*4882a593Smuzhiyun $(call msg,MKDIR,$@) 68*4882a593Smuzhiyun $(Q)mkdir -p $(OUTPUT) 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun$(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL) 71*4882a593Smuzhiyun $(call msg,GEN,$@) 72*4882a593Smuzhiyun $(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] ; then \ 73*4882a593Smuzhiyun echo "Couldn't find kernel BTF; set VMLINUX_BTF to" \ 74*4882a593Smuzhiyun "specify its location." >&2; \ 75*4882a593Smuzhiyun exit 1;\ 76*4882a593Smuzhiyun fi 77*4882a593Smuzhiyun $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@ 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT) 80*4882a593Smuzhiyun $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) \ 81*4882a593Smuzhiyun OUTPUT=$(abspath $(dir $@))/ $(abspath $@) 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun$(DEFAULT_BPFTOOL): 84*4882a593Smuzhiyun $(Q)$(MAKE) $(submake_extras) -C ../bpftool \ 85*4882a593Smuzhiyun prefix= OUTPUT=$(abs_out)/ DESTDIR=$(abs_out) install 86