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 28hostprogs-y += trace_event 29hostprogs-y += sampleip 30hostprogs-y += tc_l2_redirect 31 32test_verifier-objs := test_verifier.o libbpf.o 33test_maps-objs := test_maps.o libbpf.o 34sock_example-objs := sock_example.o libbpf.o 35fds_example-objs := bpf_load.o libbpf.o fds_example.o 36sockex1-objs := bpf_load.o libbpf.o sockex1_user.o 37sockex2-objs := bpf_load.o libbpf.o sockex2_user.o 38sockex3-objs := bpf_load.o libbpf.o sockex3_user.o 39tracex1-objs := bpf_load.o libbpf.o tracex1_user.o 40tracex2-objs := bpf_load.o libbpf.o tracex2_user.o 41tracex3-objs := bpf_load.o libbpf.o tracex3_user.o 42tracex4-objs := bpf_load.o libbpf.o tracex4_user.o 43tracex5-objs := bpf_load.o libbpf.o tracex5_user.o 44tracex6-objs := bpf_load.o libbpf.o tracex6_user.o 45test_probe_write_user-objs := bpf_load.o libbpf.o test_probe_write_user_user.o 46trace_output-objs := bpf_load.o libbpf.o trace_output_user.o 47lathist-objs := bpf_load.o libbpf.o lathist_user.o 48offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o 49spintest-objs := bpf_load.o libbpf.o spintest_user.o 50map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o 51test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o 52test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o 53xdp1-objs := bpf_load.o libbpf.o xdp1_user.o 54# reuse xdp1 source intentionally 55xdp2-objs := bpf_load.o libbpf.o xdp1_user.o 56test_current_task_under_cgroup-objs := bpf_load.o libbpf.o \ 57 test_current_task_under_cgroup_user.o 58trace_event-objs := bpf_load.o libbpf.o trace_event_user.o 59sampleip-objs := bpf_load.o libbpf.o sampleip_user.o 60tc_l2_redirect-objs := bpf_load.o libbpf.o tc_l2_redirect_user.o 61 62# Tell kbuild to always build the programs 63always := $(hostprogs-y) 64always += sockex1_kern.o 65always += sockex2_kern.o 66always += sockex3_kern.o 67always += tracex1_kern.o 68always += tracex2_kern.o 69always += tracex3_kern.o 70always += tracex4_kern.o 71always += tracex5_kern.o 72always += tracex6_kern.o 73always += test_probe_write_user_kern.o 74always += trace_output_kern.o 75always += tcbpf1_kern.o 76always += tcbpf2_kern.o 77always += tc_l2_redirect_kern.o 78always += lathist_kern.o 79always += offwaketime_kern.o 80always += spintest_kern.o 81always += map_perf_test_kern.o 82always += test_overhead_tp_kern.o 83always += test_overhead_kprobe_kern.o 84always += parse_varlen.o parse_simple.o parse_ldabs.o 85always += test_cgrp2_tc_kern.o 86always += xdp1_kern.o 87always += xdp2_kern.o 88always += test_current_task_under_cgroup_kern.o 89always += trace_event_kern.o 90always += sampleip_kern.o 91 92HOSTCFLAGS += -I$(objtree)/usr/include 93 94HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable 95HOSTLOADLIBES_fds_example += -lelf 96HOSTLOADLIBES_sockex1 += -lelf 97HOSTLOADLIBES_sockex2 += -lelf 98HOSTLOADLIBES_sockex3 += -lelf 99HOSTLOADLIBES_tracex1 += -lelf 100HOSTLOADLIBES_tracex2 += -lelf 101HOSTLOADLIBES_tracex3 += -lelf 102HOSTLOADLIBES_tracex4 += -lelf -lrt 103HOSTLOADLIBES_tracex5 += -lelf 104HOSTLOADLIBES_tracex6 += -lelf 105HOSTLOADLIBES_test_probe_write_user += -lelf 106HOSTLOADLIBES_trace_output += -lelf -lrt 107HOSTLOADLIBES_lathist += -lelf 108HOSTLOADLIBES_offwaketime += -lelf 109HOSTLOADLIBES_spintest += -lelf 110HOSTLOADLIBES_map_perf_test += -lelf -lrt 111HOSTLOADLIBES_test_overhead += -lelf -lrt 112HOSTLOADLIBES_xdp1 += -lelf 113HOSTLOADLIBES_xdp2 += -lelf 114HOSTLOADLIBES_test_current_task_under_cgroup += -lelf 115HOSTLOADLIBES_trace_event += -lelf 116HOSTLOADLIBES_sampleip += -lelf 117HOSTLOADLIBES_tc_l2_redirect += -l elf 118 119# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 120# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang 121LLC ?= llc 122CLANG ?= clang 123 124# Trick to allow make to be run from this directory 125all: 126 $(MAKE) -C ../../ $$PWD/ 127 128clean: 129 $(MAKE) -C ../../ M=$$PWD clean 130 @rm -f *~ 131 132# Verify LLVM compiler tools are available and bpf target is supported by llc 133.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 134 135verify_cmds: $(CLANG) $(LLC) 136 @for TOOL in $^ ; do \ 137 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 138 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 139 exit 1; \ 140 else true; fi; \ 141 done 142 143verify_target_bpf: verify_cmds 144 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 145 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 146 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 147 exit 2; \ 148 else true; fi 149 150$(src)/*.c: verify_target_bpf 151 152# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 153# But, there is no easy way to fix it, so just exclude it since it is 154# useless for BPF samples. 155$(obj)/%.o: $(src)/%.c 156 $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \ 157 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ 158 -Wno-compare-distinct-pointer-types \ 159 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ 160