samples/bpf/Makefile

   1 # kbuild trick to avoid linker error. Can be omitted if a module is built.
   2 obj- := dummy.o
   3
   4 # List of programs to build
   5 hostprogs-y += sock_example
   6 hostprogs-y += fds_example
   7 hostprogs-y += sockex1
   8 hostprogs-y += sockex2
   9 hostprogs-y += sockex3
  10 hostprogs-y += tracex1
  11 hostprogs-y += tracex2
  12 hostprogs-y += tracex3
  13 hostprogs-y += tracex4
  14 hostprogs-y += tracex5
  15 hostprogs-y += tracex6
  16 hostprogs-y += test_probe_write_user
  17 hostprogs-y += trace_output
  18 hostprogs-y += lathist
  19 hostprogs-y += offwaketime
  20 hostprogs-y += spintest
  21 hostprogs-y += map_perf_test
  22 hostprogs-y += test_overhead
  23 hostprogs-y += test_cgrp2_array_pin
  24 hostprogs-y += xdp1
  25 hostprogs-y += xdp2
  26 hostprogs-y += test_current_task_under_cgroup
  27 hostprogs-y += trace_event
  28 hostprogs-y += sampleip
  29
  30 sock_example-objs := sock_example.o libbpf.o
  31 fds_example-objs := bpf_load.o libbpf.o fds_example.o
  32 sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
  33 sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
  34 sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
  35 tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
  36 tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
  37 tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
  38 tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
  39 tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
  40 tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
  41 test_probe_write_user-objs := bpf_load.o libbpf.o test_probe_write_user_user.o
  42 trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
  43 lathist-objs := bpf_load.o libbpf.o lathist_user.o
  44 offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
  45 spintest-objs := bpf_load.o libbpf.o spintest_user.o
  46 map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
  47 test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
  48 test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o
  49 xdp1-objs := bpf_load.o libbpf.o xdp1_user.o
  50 # reuse xdp1 source intentionally
  51 xdp2-objs := bpf_load.o libbpf.o xdp1_user.o
  52 test_current_task_under_cgroup-objs := bpf_load.o libbpf.o \
  53                                        test_current_task_under_cgroup_user.o
  54 trace_event-objs := bpf_load.o libbpf.o trace_event_user.o
  55 sampleip-objs := bpf_load.o libbpf.o sampleip_user.o
  56
  57 # Tell kbuild to always build the programs
  58 always := $(hostprogs-y)
  59 always += sockex1_kern.o
  60 always += sockex2_kern.o
  61 always += sockex3_kern.o
  62 always += tracex1_kern.o
  63 always += tracex2_kern.o
  64 always += tracex3_kern.o
  65 always += tracex4_kern.o
  66 always += tracex5_kern.o
  67 always += tracex6_kern.o
  68 always += test_probe_write_user_kern.o
  69 always += trace_output_kern.o
  70 always += tcbpf1_kern.o
  71 always += tcbpf2_kern.o
  72 always += lathist_kern.o
  73 always += offwaketime_kern.o
  74 always += spintest_kern.o
  75 always += map_perf_test_kern.o
  76 always += test_overhead_tp_kern.o
  77 always += test_overhead_kprobe_kern.o
  78 always += parse_varlen.o parse_simple.o parse_ldabs.o
  79 always += test_cgrp2_tc_kern.o
  80 always += xdp1_kern.o
  81 always += xdp2_kern.o
  82 always += test_current_task_under_cgroup_kern.o
  83 always += trace_event_kern.o
  84 always += sampleip_kern.o
  85
  86 HOSTCFLAGS += -I$(objtree)/usr/include
  87
  88 HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
  89 HOSTLOADLIBES_fds_example += -lelf
  90 HOSTLOADLIBES_sockex1 += -lelf
  91 HOSTLOADLIBES_sockex2 += -lelf
  92 HOSTLOADLIBES_sockex3 += -lelf
  93 HOSTLOADLIBES_tracex1 += -lelf
  94 HOSTLOADLIBES_tracex2 += -lelf
  95 HOSTLOADLIBES_tracex3 += -lelf
  96 HOSTLOADLIBES_tracex4 += -lelf -lrt
  97 HOSTLOADLIBES_tracex5 += -lelf
  98 HOSTLOADLIBES_tracex6 += -lelf
  99 HOSTLOADLIBES_test_probe_write_user += -lelf
 100 HOSTLOADLIBES_trace_output += -lelf -lrt
 101 HOSTLOADLIBES_lathist += -lelf
 102 HOSTLOADLIBES_offwaketime += -lelf
 103 HOSTLOADLIBES_spintest += -lelf
 104 HOSTLOADLIBES_map_perf_test += -lelf -lrt
 105 HOSTLOADLIBES_test_overhead += -lelf -lrt
 106 HOSTLOADLIBES_xdp1 += -lelf
 107 HOSTLOADLIBES_xdp2 += -lelf
 108 HOSTLOADLIBES_test_current_task_under_cgroup += -lelf
 109 HOSTLOADLIBES_trace_event += -lelf
 110 HOSTLOADLIBES_sampleip += -lelf
 111
 112 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
 113 #  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
 114 LLC ?= llc
 115 CLANG ?= clang
 116
 117 # Trick to allow make to be run from this directory
 118 all:
 119         $(MAKE) -C ../../ $$PWD/
 120
 121 clean:
 122         $(MAKE) -C ../../ M=$$PWD clean
 123         @rm -f *~
 124
 125 # Verify LLVM compiler tools are available and bpf target is supported by llc
 126 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
 127
 128 verify_cmds: $(CLANG) $(LLC)
 129         @for TOOL in $^ ; do \
 130                 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
 131                         echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
 132                         exit 1; \
 133                 else true; fi; \
 134         done
 135
 136 verify_target_bpf: verify_cmds
 137         @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
 138                 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
 139                 echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
 140                 exit 2; \
 141         else true; fi
 142
 143 $(src)/*.c: verify_target_bpf
 144
 145 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
 146 # But, there is no easy way to fix it, so just exclude it since it is
 147 # useless for BPF samples.
 148 $(obj)/%.o: $(src)/%.c
 149         $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
 150                 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
 151                 -Wno-compare-distinct-pointer-types \
 152                 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@