1 # kbuild trick to avoid linker error. Can be omitted if a module is built.
4 # List of programs to build
5 hostprogs-y := test_verifier test_maps
6 hostprogs-y += sock_example
7 hostprogs-y += fds_example
10 hostprogs-y += sockex3
11 hostprogs-y += tracex1
12 hostprogs-y += tracex2
13 hostprogs-y += tracex3
14 hostprogs-y += tracex4
15 hostprogs-y += tracex5
16 hostprogs-y += tracex6
17 hostprogs-y += test_probe_write_user
18 hostprogs-y += trace_output
19 hostprogs-y += lathist
20 hostprogs-y += offwaketime
21 hostprogs-y += spintest
22 hostprogs-y += map_perf_test
23 hostprogs-y += test_overhead
24 hostprogs-y += test_cgrp2_array_pin
27 hostprogs-y += test_current_task_under_cgroup
29 test_verifier-objs := test_verifier.o libbpf.o
30 test_maps-objs := test_maps.o libbpf.o
31 sock_example-objs := sock_example.o libbpf.o
32 fds_example-objs := bpf_load.o libbpf.o fds_example.o
33 sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
34 sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
35 sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
36 tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
37 tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
38 tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
39 tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
40 tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
41 tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
42 test_probe_write_user-objs := bpf_load.o libbpf.o test_probe_write_user_user.o
43 trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
44 lathist-objs := bpf_load.o libbpf.o lathist_user.o
45 offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
46 spintest-objs := bpf_load.o libbpf.o spintest_user.o
47 map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
48 test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
49 test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o
50 xdp1-objs := bpf_load.o libbpf.o xdp1_user.o
51 # reuse xdp1 source intentionally
52 xdp2-objs := bpf_load.o libbpf.o xdp1_user.o
53 test_current_task_under_cgroup-objs := bpf_load.o libbpf.o \
54 test_current_task_under_cgroup_user.o
56 # Tell kbuild to always build the programs
57 always := $(hostprogs-y)
58 always += sockex1_kern.o
59 always += sockex2_kern.o
60 always += sockex3_kern.o
61 always += tracex1_kern.o
62 always += tracex2_kern.o
63 always += tracex3_kern.o
64 always += tracex4_kern.o
65 always += tracex5_kern.o
66 always += tracex6_kern.o
67 always += test_probe_write_user_kern.o
68 always += trace_output_kern.o
69 always += tcbpf1_kern.o
70 always += lathist_kern.o
71 always += offwaketime_kern.o
72 always += spintest_kern.o
73 always += map_perf_test_kern.o
74 always += test_overhead_tp_kern.o
75 always += test_overhead_kprobe_kern.o
76 always += parse_varlen.o parse_simple.o parse_ldabs.o
77 always += test_cgrp2_tc_kern.o
80 always += test_current_task_under_cgroup_kern.o
82 HOSTCFLAGS += -I$(objtree)/usr/include
84 HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
85 HOSTLOADLIBES_fds_example += -lelf
86 HOSTLOADLIBES_sockex1 += -lelf
87 HOSTLOADLIBES_sockex2 += -lelf
88 HOSTLOADLIBES_sockex3 += -lelf
89 HOSTLOADLIBES_tracex1 += -lelf
90 HOSTLOADLIBES_tracex2 += -lelf
91 HOSTLOADLIBES_tracex3 += -lelf
92 HOSTLOADLIBES_tracex4 += -lelf -lrt
93 HOSTLOADLIBES_tracex5 += -lelf
94 HOSTLOADLIBES_tracex6 += -lelf
95 HOSTLOADLIBES_test_probe_write_user += -lelf
96 HOSTLOADLIBES_trace_output += -lelf -lrt
97 HOSTLOADLIBES_lathist += -lelf
98 HOSTLOADLIBES_offwaketime += -lelf
99 HOSTLOADLIBES_spintest += -lelf
100 HOSTLOADLIBES_map_perf_test += -lelf -lrt
101 HOSTLOADLIBES_test_overhead += -lelf -lrt
102 HOSTLOADLIBES_xdp1 += -lelf
103 HOSTLOADLIBES_xdp2 += -lelf
104 HOSTLOADLIBES_test_current_task_under_cgroup += -lelf
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
111 # Trick to allow make to be run from this directory
113 $(MAKE) -C ../../ $$PWD/
116 $(MAKE) -C ../../ M=$$PWD clean
119 # Verify LLVM compiler tools are available and bpf target is supported by llc
120 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
122 verify_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}" ;\
130 verify_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" ;\
137 $(src)/*.c: verify_target_bpf
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 $@