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