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 23 24test_verifier-objs := test_verifier.o libbpf.o 25test_maps-objs := test_maps.o libbpf.o 26sock_example-objs := sock_example.o libbpf.o 27fds_example-objs := bpf_load.o libbpf.o fds_example.o 28sockex1-objs := bpf_load.o libbpf.o sockex1_user.o 29sockex2-objs := bpf_load.o libbpf.o sockex2_user.o 30sockex3-objs := bpf_load.o libbpf.o sockex3_user.o 31tracex1-objs := bpf_load.o libbpf.o tracex1_user.o 32tracex2-objs := bpf_load.o libbpf.o tracex2_user.o 33tracex3-objs := bpf_load.o libbpf.o tracex3_user.o 34tracex4-objs := bpf_load.o libbpf.o tracex4_user.o 35tracex5-objs := bpf_load.o libbpf.o tracex5_user.o 36tracex6-objs := bpf_load.o libbpf.o tracex6_user.o 37trace_output-objs := bpf_load.o libbpf.o trace_output_user.o 38lathist-objs := bpf_load.o libbpf.o lathist_user.o 39offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o 40spintest-objs := bpf_load.o libbpf.o spintest_user.o 41map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o 42test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o 43 44# Tell kbuild to always build the programs 45always := $(hostprogs-y) 46always += sockex1_kern.o 47always += sockex2_kern.o 48always += sockex3_kern.o 49always += tracex1_kern.o 50always += tracex2_kern.o 51always += tracex3_kern.o 52always += tracex4_kern.o 53always += tracex5_kern.o 54always += tracex6_kern.o 55always += trace_output_kern.o 56always += tcbpf1_kern.o 57always += lathist_kern.o 58always += offwaketime_kern.o 59always += spintest_kern.o 60always += map_perf_test_kern.o 61always += test_overhead_tp_kern.o 62always += test_overhead_kprobe_kern.o 63 64HOSTCFLAGS += -I$(objtree)/usr/include 65 66HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable 67HOSTLOADLIBES_fds_example += -lelf 68HOSTLOADLIBES_sockex1 += -lelf 69HOSTLOADLIBES_sockex2 += -lelf 70HOSTLOADLIBES_sockex3 += -lelf 71HOSTLOADLIBES_tracex1 += -lelf 72HOSTLOADLIBES_tracex2 += -lelf 73HOSTLOADLIBES_tracex3 += -lelf 74HOSTLOADLIBES_tracex4 += -lelf -lrt 75HOSTLOADLIBES_tracex5 += -lelf 76HOSTLOADLIBES_tracex6 += -lelf 77HOSTLOADLIBES_trace_output += -lelf -lrt 78HOSTLOADLIBES_lathist += -lelf 79HOSTLOADLIBES_offwaketime += -lelf 80HOSTLOADLIBES_spintest += -lelf 81HOSTLOADLIBES_map_perf_test += -lelf -lrt 82HOSTLOADLIBES_test_overhead += -lelf -lrt 83 84# Allows pointing LLC to a LLVM backend with bpf support, redefine on cmdline: 85# make samples/bpf/ LLC=~/git/llvm/build/bin/llc 86LLC ?= llc 87 88# Verify LLVM compiler is available and bpf target is supported 89.PHONY: verify_cmd_llc verify_target_bpf 90 91verify_cmd_llc: 92 @if ! (which "${LLC}" > /dev/null 2>&1); then \ 93 echo "*** ERROR: Cannot find LLVM tool 'llc' (${LLC})" ;\ 94 exit 1; \ 95 else true; fi 96 97verify_target_bpf: verify_cmd_llc 98 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 99 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 100 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 101 exit 2; \ 102 else true; fi 103 104$(src)/*.c: verify_target_bpf 105 106# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 107# But, there is no easy way to fix it, so just exclude it since it is 108# useless for BPF samples. 109$(obj)/%.o: $(src)/%.c 110 clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \ 111 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ 112 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ 113