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 += test_probe_write_user 18hostprogs-y += trace_output 19hostprogs-y += lathist 20hostprogs-y += offwaketime 21hostprogs-y += spintest 22hostprogs-y += map_perf_test 23hostprogs-y += test_overhead 24hostprogs-y += test_cgrp2_array_pin 25hostprogs-y += xdp1 26hostprogs-y += xdp2 27hostprogs-y += test_current_task_under_cgroup 28 29test_verifier-objs := test_verifier.o libbpf.o 30test_maps-objs := test_maps.o libbpf.o 31sock_example-objs := sock_example.o libbpf.o 32fds_example-objs := bpf_load.o libbpf.o fds_example.o 33sockex1-objs := bpf_load.o libbpf.o sockex1_user.o 34sockex2-objs := bpf_load.o libbpf.o sockex2_user.o 35sockex3-objs := bpf_load.o libbpf.o sockex3_user.o 36tracex1-objs := bpf_load.o libbpf.o tracex1_user.o 37tracex2-objs := bpf_load.o libbpf.o tracex2_user.o 38tracex3-objs := bpf_load.o libbpf.o tracex3_user.o 39tracex4-objs := bpf_load.o libbpf.o tracex4_user.o 40tracex5-objs := bpf_load.o libbpf.o tracex5_user.o 41tracex6-objs := bpf_load.o libbpf.o tracex6_user.o 42test_probe_write_user-objs := bpf_load.o libbpf.o test_probe_write_user_user.o 43trace_output-objs := bpf_load.o libbpf.o trace_output_user.o 44lathist-objs := bpf_load.o libbpf.o lathist_user.o 45offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o 46spintest-objs := bpf_load.o libbpf.o spintest_user.o 47map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o 48test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o 49test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o 50xdp1-objs := bpf_load.o libbpf.o xdp1_user.o 51# reuse xdp1 source intentionally 52xdp2-objs := bpf_load.o libbpf.o xdp1_user.o 53test_current_task_under_cgroup-objs := bpf_load.o libbpf.o \ 54 test_current_task_under_cgroup_user.o 55 56# Tell kbuild to always build the programs 57always := $(hostprogs-y) 58always += sockex1_kern.o 59always += sockex2_kern.o 60always += sockex3_kern.o 61always += tracex1_kern.o 62always += tracex2_kern.o 63always += tracex3_kern.o 64always += tracex4_kern.o 65always += tracex5_kern.o 66always += tracex6_kern.o 67always += test_probe_write_user_kern.o 68always += trace_output_kern.o 69always += tcbpf1_kern.o 70always += lathist_kern.o 71always += offwaketime_kern.o 72always += spintest_kern.o 73always += map_perf_test_kern.o 74always += test_overhead_tp_kern.o 75always += test_overhead_kprobe_kern.o 76always += parse_varlen.o parse_simple.o parse_ldabs.o 77always += test_cgrp2_tc_kern.o 78always += xdp1_kern.o 79always += xdp2_kern.o 80always += test_current_task_under_cgroup_kern.o 81 82HOSTCFLAGS += -I$(objtree)/usr/include 83 84HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable 85HOSTLOADLIBES_fds_example += -lelf 86HOSTLOADLIBES_sockex1 += -lelf 87HOSTLOADLIBES_sockex2 += -lelf 88HOSTLOADLIBES_sockex3 += -lelf 89HOSTLOADLIBES_tracex1 += -lelf 90HOSTLOADLIBES_tracex2 += -lelf 91HOSTLOADLIBES_tracex3 += -lelf 92HOSTLOADLIBES_tracex4 += -lelf -lrt 93HOSTLOADLIBES_tracex5 += -lelf 94HOSTLOADLIBES_tracex6 += -lelf 95HOSTLOADLIBES_test_probe_write_user += -lelf 96HOSTLOADLIBES_trace_output += -lelf -lrt 97HOSTLOADLIBES_lathist += -lelf 98HOSTLOADLIBES_offwaketime += -lelf 99HOSTLOADLIBES_spintest += -lelf 100HOSTLOADLIBES_map_perf_test += -lelf -lrt 101HOSTLOADLIBES_test_overhead += -lelf -lrt 102HOSTLOADLIBES_xdp1 += -lelf 103HOSTLOADLIBES_xdp2 += -lelf 104HOSTLOADLIBES_test_current_task_under_cgroup += -lelf 105 106# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 107# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang 108LLC ?= llc 109CLANG ?= clang 110 111# Trick to allow make to be run from this directory 112all: 113 $(MAKE) -C ../../ $$PWD/ 114 115clean: 116 $(MAKE) -C ../../ M=$$PWD clean 117 @rm -f *~ 118 119# Verify LLVM compiler tools are available and bpf target is supported by llc 120.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 121 122verify_cmds: $(CLANG) $(LLC) 123 @for TOOL in $^ ; do \ 124 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 125 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 126 exit 1; \ 127 else true; fi; \ 128 done 129 130verify_target_bpf: verify_cmds 131 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 132 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 133 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 134 exit 2; \ 135 else true; fi 136 137$(src)/*.c: verify_target_bpf 138 139# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 140# But, there is no easy way to fix it, so just exclude it since it is 141# useless for BPF samples. 142$(obj)/%.o: $(src)/%.c 143 $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \ 144 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ 145 -Wno-compare-distinct-pointer-types \ 146 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ 147