1# kbuild trick to avoid linker error. Can be omitted if a module is built. 2obj- := dummy.o 3 4# List of programs to build 5hostprogs-y := test_verifier test_maps 6hostprogs-y += sock_example 7hostprogs-y += fds_example 8hostprogs-y += sockex1 9hostprogs-y += sockex2 10hostprogs-y += sockex3 11hostprogs-y += tracex1 12hostprogs-y += tracex2 13hostprogs-y += tracex3 14hostprogs-y += tracex4 15hostprogs-y += tracex5 16hostprogs-y += tracex6 17hostprogs-y += trace_output 18hostprogs-y += lathist 19hostprogs-y += offwaketime 20hostprogs-y += spintest 21hostprogs-y += map_perf_test 22hostprogs-y += test_overhead 23hostprogs-y += test_cgrp2_array_pin 24hostprogs-y += xdp1 25 26test_verifier-objs := test_verifier.o libbpf.o 27test_maps-objs := test_maps.o libbpf.o 28sock_example-objs := sock_example.o libbpf.o 29fds_example-objs := bpf_load.o libbpf.o fds_example.o 30sockex1-objs := bpf_load.o libbpf.o sockex1_user.o 31sockex2-objs := bpf_load.o libbpf.o sockex2_user.o 32sockex3-objs := bpf_load.o libbpf.o sockex3_user.o 33tracex1-objs := bpf_load.o libbpf.o tracex1_user.o 34tracex2-objs := bpf_load.o libbpf.o tracex2_user.o 35tracex3-objs := bpf_load.o libbpf.o tracex3_user.o 36tracex4-objs := bpf_load.o libbpf.o tracex4_user.o 37tracex5-objs := bpf_load.o libbpf.o tracex5_user.o 38tracex6-objs := bpf_load.o libbpf.o tracex6_user.o 39trace_output-objs := bpf_load.o libbpf.o trace_output_user.o 40lathist-objs := bpf_load.o libbpf.o lathist_user.o 41offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o 42spintest-objs := bpf_load.o libbpf.o spintest_user.o 43map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o 44test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o 45test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o 46xdp1-objs := bpf_load.o libbpf.o xdp1_user.o 47 48# Tell kbuild to always build the programs 49always := $(hostprogs-y) 50always += sockex1_kern.o 51always += sockex2_kern.o 52always += sockex3_kern.o 53always += tracex1_kern.o 54always += tracex2_kern.o 55always += tracex3_kern.o 56always += tracex4_kern.o 57always += tracex5_kern.o 58always += tracex6_kern.o 59always += trace_output_kern.o 60always += tcbpf1_kern.o 61always += lathist_kern.o 62always += offwaketime_kern.o 63always += spintest_kern.o 64always += map_perf_test_kern.o 65always += test_overhead_tp_kern.o 66always += test_overhead_kprobe_kern.o 67always += parse_varlen.o parse_simple.o parse_ldabs.o 68always += test_cgrp2_tc_kern.o 69always += xdp1_kern.o 70 71HOSTCFLAGS += -I$(objtree)/usr/include 72 73HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable 74HOSTLOADLIBES_fds_example += -lelf 75HOSTLOADLIBES_sockex1 += -lelf 76HOSTLOADLIBES_sockex2 += -lelf 77HOSTLOADLIBES_sockex3 += -lelf 78HOSTLOADLIBES_tracex1 += -lelf 79HOSTLOADLIBES_tracex2 += -lelf 80HOSTLOADLIBES_tracex3 += -lelf 81HOSTLOADLIBES_tracex4 += -lelf -lrt 82HOSTLOADLIBES_tracex5 += -lelf 83HOSTLOADLIBES_tracex6 += -lelf 84HOSTLOADLIBES_trace_output += -lelf -lrt 85HOSTLOADLIBES_lathist += -lelf 86HOSTLOADLIBES_offwaketime += -lelf 87HOSTLOADLIBES_spintest += -lelf 88HOSTLOADLIBES_map_perf_test += -lelf -lrt 89HOSTLOADLIBES_test_overhead += -lelf -lrt 90HOSTLOADLIBES_xdp1 += -lelf 91 92# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 93# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang 94LLC ?= llc 95CLANG ?= clang 96 97# Trick to allow make to be run from this directory 98all: 99 $(MAKE) -C ../../ $$PWD/ 100 101clean: 102 $(MAKE) -C ../../ M=$$PWD clean 103 @rm -f *~ 104 105# Verify LLVM compiler tools are available and bpf target is supported by llc 106.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 107 108verify_cmds: $(CLANG) $(LLC) 109 @for TOOL in $^ ; do \ 110 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 111 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 112 exit 1; \ 113 else true; fi; \ 114 done 115 116verify_target_bpf: verify_cmds 117 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 118 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 119 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 120 exit 2; \ 121 else true; fi 122 123$(src)/*.c: verify_target_bpf 124 125# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 126# But, there is no easy way to fix it, so just exclude it since it is 127# useless for BPF samples. 128$(obj)/%.o: $(src)/%.c 129 $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \ 130 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ 131 -Wno-compare-distinct-pointer-types \ 132 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ 133