1 # SPDX-License-Identifier: GPL-2.0 !! 1 # kbuild trick to avoid linker error. Can be omitted if a module is built.
2 !! 2 obj- := dummy.o
3 BPF_SAMPLES_PATH ?= $(abspath $(src)) <<
4 TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools <<
5 <<
6 pound := \# <<
7 3
8 # List of programs to build 4 # List of programs to build
9 tprogs-y := test_lru_dist !! 5 hostprogs-y := test_lru_dist
10 tprogs-y += sock_example !! 6 hostprogs-y += sock_example
11 tprogs-y += fds_example !! 7 hostprogs-y += fds_example
12 tprogs-y += sockex1 !! 8 hostprogs-y += sockex1
13 tprogs-y += sockex2 !! 9 hostprogs-y += sockex2
14 tprogs-y += sockex3 !! 10 hostprogs-y += sockex3
15 tprogs-y += tracex1 !! 11 hostprogs-y += tracex1
16 tprogs-y += tracex3 !! 12 hostprogs-y += tracex2
17 tprogs-y += tracex4 !! 13 hostprogs-y += tracex3
18 tprogs-y += tracex5 !! 14 hostprogs-y += tracex4
19 tprogs-y += tracex6 !! 15 hostprogs-y += tracex5
20 tprogs-y += tracex7 !! 16 hostprogs-y += tracex6
21 tprogs-y += test_probe_write_user !! 17 hostprogs-y += test_probe_write_user
22 tprogs-y += trace_output !! 18 hostprogs-y += trace_output
23 tprogs-y += lathist !! 19 hostprogs-y += lathist
24 tprogs-y += offwaketime !! 20 hostprogs-y += offwaketime
25 tprogs-y += spintest !! 21 hostprogs-y += spintest
26 tprogs-y += map_perf_test !! 22 hostprogs-y += map_perf_test
27 tprogs-y += test_overhead !! 23 hostprogs-y += test_overhead
28 tprogs-y += test_cgrp2_array_pin !! 24 hostprogs-y += test_cgrp2_array_pin
29 tprogs-y += test_cgrp2_attach !! 25 hostprogs-y += test_cgrp2_attach
30 tprogs-y += test_cgrp2_sock !! 26 hostprogs-y += test_cgrp2_attach2
31 tprogs-y += test_cgrp2_sock2 !! 27 hostprogs-y += test_cgrp2_sock
32 tprogs-y += xdp_router_ipv4 !! 28 hostprogs-y += test_cgrp2_sock2
33 tprogs-y += test_current_task_under_cgroup !! 29 hostprogs-y += xdp1
34 tprogs-y += trace_event !! 30 hostprogs-y += xdp2
35 tprogs-y += sampleip !! 31 hostprogs-y += test_current_task_under_cgroup
36 tprogs-y += tc_l2_redirect !! 32 hostprogs-y += trace_event
37 tprogs-y += lwt_len_hist !! 33 hostprogs-y += sampleip
38 tprogs-y += xdp_tx_iptunnel !! 34 hostprogs-y += tc_l2_redirect
39 tprogs-y += test_map_in_map !! 35 hostprogs-y += lwt_len_hist
40 tprogs-y += per_socket_stats_example !! 36 hostprogs-y += xdp_tx_iptunnel
41 tprogs-y += syscall_tp !! 37 hostprogs-y += test_map_in_map
42 tprogs-y += cpustat !! 38 hostprogs-y += per_socket_stats_example
43 tprogs-y += xdp_adjust_tail <<
44 tprogs-y += xdp_fwd <<
45 tprogs-y += task_fd_query <<
46 tprogs-y += ibumad <<
47 tprogs-y += hbm <<
48 39
49 # Libbpf dependencies 40 # Libbpf dependencies
50 LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf !! 41 LIBBPF := ../../tools/lib/bpf/bpf.o
51 LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH)) <<
52 LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) <<
53 LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include <<
54 LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a <<
55 <<
56 CGROUP_HELPERS := ../../tools/testing/selftest <<
57 TRACE_HELPERS := ../../tools/testing/selftests <<
58 XDP_SAMPLE := xdp_sample_user.o <<
59 <<
60 fds_example-objs := fds_example.o <<
61 sockex1-objs := sockex1_user.o <<
62 sockex2-objs := sockex2_user.o <<
63 sockex3-objs := sockex3_user.o <<
64 tracex1-objs := tracex1_user.o $(TRACE_HELPERS <<
65 tracex3-objs := tracex3_user.o <<
66 tracex4-objs := tracex4_user.o <<
67 tracex5-objs := tracex5_user.o $(TRACE_HELPERS <<
68 tracex6-objs := tracex6_user.o <<
69 tracex7-objs := tracex7_user.o <<
70 test_probe_write_user-objs := test_probe_write <<
71 trace_output-objs := trace_output_user.o <<
72 lathist-objs := lathist_user.o <<
73 offwaketime-objs := offwaketime_user.o $(TRACE <<
74 spintest-objs := spintest_user.o $(TRACE_HELPE <<
75 map_perf_test-objs := map_perf_test_user.o <<
76 test_overhead-objs := test_overhead_user.o <<
77 test_cgrp2_array_pin-objs := test_cgrp2_array_ <<
78 test_cgrp2_attach-objs := test_cgrp2_attach.o <<
79 test_cgrp2_sock-objs := test_cgrp2_sock.o <<
80 test_cgrp2_sock2-objs := test_cgrp2_sock2.o <<
81 test_current_task_under_cgroup-objs := $(CGROU <<
82 test_cu <<
83 trace_event-objs := trace_event_user.o $(TRACE <<
84 sampleip-objs := sampleip_user.o $(TRACE_HELPE <<
85 tc_l2_redirect-objs := tc_l2_redirect_user.o <<
86 lwt_len_hist-objs := lwt_len_hist_user.o <<
87 xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o <<
88 test_map_in_map-objs := test_map_in_map_user.o <<
89 per_socket_stats_example-objs := cookie_uid_he <<
90 syscall_tp-objs := syscall_tp_user.o <<
91 cpustat-objs := cpustat_user.o <<
92 xdp_adjust_tail-objs := xdp_adjust_tail_user.o <<
93 xdp_fwd-objs := xdp_fwd_user.o <<
94 task_fd_query-objs := task_fd_query_user.o $(T <<
95 ibumad-objs := ibumad_user.o <<
96 hbm-objs := hbm.o $(CGROUP_HELPERS) <<
97 42
98 xdp_router_ipv4-objs := xdp_router_ipv4_user.o !! 43 test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
>> 44 sock_example-objs := sock_example.o $(LIBBPF)
>> 45 fds_example-objs := bpf_load.o $(LIBBPF) fds_example.o
>> 46 sockex1-objs := bpf_load.o $(LIBBPF) sockex1_user.o
>> 47 sockex2-objs := bpf_load.o $(LIBBPF) sockex2_user.o
>> 48 sockex3-objs := bpf_load.o $(LIBBPF) sockex3_user.o
>> 49 tracex1-objs := bpf_load.o $(LIBBPF) tracex1_user.o
>> 50 tracex2-objs := bpf_load.o $(LIBBPF) tracex2_user.o
>> 51 tracex3-objs := bpf_load.o $(LIBBPF) tracex3_user.o
>> 52 tracex4-objs := bpf_load.o $(LIBBPF) tracex4_user.o
>> 53 tracex5-objs := bpf_load.o $(LIBBPF) tracex5_user.o
>> 54 tracex6-objs := bpf_load.o $(LIBBPF) tracex6_user.o
>> 55 test_probe_write_user-objs := bpf_load.o $(LIBBPF) test_probe_write_user_user.o
>> 56 trace_output-objs := bpf_load.o $(LIBBPF) trace_output_user.o
>> 57 lathist-objs := bpf_load.o $(LIBBPF) lathist_user.o
>> 58 offwaketime-objs := bpf_load.o $(LIBBPF) offwaketime_user.o
>> 59 spintest-objs := bpf_load.o $(LIBBPF) spintest_user.o
>> 60 map_perf_test-objs := bpf_load.o $(LIBBPF) map_perf_test_user.o
>> 61 test_overhead-objs := bpf_load.o $(LIBBPF) test_overhead_user.o
>> 62 test_cgrp2_array_pin-objs := $(LIBBPF) test_cgrp2_array_pin.o
>> 63 test_cgrp2_attach-objs := $(LIBBPF) test_cgrp2_attach.o
>> 64 test_cgrp2_attach2-objs := $(LIBBPF) test_cgrp2_attach2.o cgroup_helpers.o
>> 65 test_cgrp2_sock-objs := $(LIBBPF) test_cgrp2_sock.o
>> 66 test_cgrp2_sock2-objs := bpf_load.o $(LIBBPF) test_cgrp2_sock2.o
>> 67 xdp1-objs := bpf_load.o $(LIBBPF) xdp1_user.o
>> 68 # reuse xdp1 source intentionally
>> 69 xdp2-objs := bpf_load.o $(LIBBPF) xdp1_user.o
>> 70 test_current_task_under_cgroup-objs := bpf_load.o $(LIBBPF) cgroup_helpers.o \
>> 71 test_current_task_under_cgroup_user.o
>> 72 trace_event-objs := bpf_load.o $(LIBBPF) trace_event_user.o
>> 73 sampleip-objs := bpf_load.o $(LIBBPF) sampleip_user.o
>> 74 tc_l2_redirect-objs := bpf_load.o $(LIBBPF) tc_l2_redirect_user.o
>> 75 lwt_len_hist-objs := bpf_load.o $(LIBBPF) lwt_len_hist_user.o
>> 76 xdp_tx_iptunnel-objs := bpf_load.o $(LIBBPF) xdp_tx_iptunnel_user.o
>> 77 test_map_in_map-objs := bpf_load.o $(LIBBPF) test_map_in_map_user.o
>> 78 per_socket_stats_example-objs := $(LIBBPF) cookie_uid_helper_example.o
99 79
100 # Tell kbuild to always build the programs 80 # Tell kbuild to always build the programs
101 always-y := $(tprogs-y) !! 81 always := $(hostprogs-y)
102 always-y += sockex1_kern.o !! 82 always += sockex1_kern.o
103 always-y += sockex2_kern.o !! 83 always += sockex2_kern.o
104 always-y += sockex3_kern.o !! 84 always += sockex3_kern.o
105 always-y += tracex1.bpf.o !! 85 always += tracex1_kern.o
106 always-y += tracex3.bpf.o !! 86 always += tracex2_kern.o
107 always-y += tracex4.bpf.o !! 87 always += tracex3_kern.o
108 always-y += tracex5.bpf.o !! 88 always += tracex4_kern.o
109 always-y += tracex6.bpf.o !! 89 always += tracex5_kern.o
110 always-y += tracex7.bpf.o !! 90 always += tracex6_kern.o
111 always-y += sock_flags.bpf.o !! 91 always += sock_flags_kern.o
112 always-y += test_probe_write_user.bpf.o !! 92 always += test_probe_write_user_kern.o
113 always-y += trace_output.bpf.o !! 93 always += trace_output_kern.o
114 always-y += tcbpf1_kern.o !! 94 always += tcbpf1_kern.o
115 always-y += tc_l2_redirect_kern.o !! 95 always += tcbpf2_kern.o
116 always-y += lathist_kern.o !! 96 always += tc_l2_redirect_kern.o
117 always-y += offwaketime.bpf.o !! 97 always += lathist_kern.o
118 always-y += spintest.bpf.o !! 98 always += offwaketime_kern.o
119 always-y += map_perf_test.bpf.o !! 99 always += spintest_kern.o
120 always-y += test_overhead_tp.bpf.o !! 100 always += map_perf_test_kern.o
121 always-y += test_overhead_raw_tp.bpf.o !! 101 always += test_overhead_tp_kern.o
122 always-y += test_overhead_kprobe.bpf.o !! 102 always += test_overhead_kprobe_kern.o
123 always-y += parse_varlen.o parse_simple.o pars !! 103 always += parse_varlen.o parse_simple.o parse_ldabs.o
124 always-y += test_cgrp2_tc.bpf.o !! 104 always += test_cgrp2_tc_kern.o
125 always-y += test_current_task_under_cgroup.bpf !! 105 always += xdp1_kern.o
126 always-y += trace_event_kern.o !! 106 always += xdp2_kern.o
127 always-y += sampleip_kern.o !! 107 always += test_current_task_under_cgroup_kern.o
128 always-y += lwt_len_hist.bpf.o !! 108 always += trace_event_kern.o
129 always-y += xdp_tx_iptunnel_kern.o !! 109 always += sampleip_kern.o
130 always-y += test_map_in_map.bpf.o !! 110 always += lwt_len_hist_kern.o
131 always-y += tcp_synrto_kern.o !! 111 always += xdp_tx_iptunnel_kern.o
132 always-y += tcp_rwnd_kern.o !! 112 always += test_map_in_map_kern.o
133 always-y += tcp_bufs_kern.o !! 113 always += cookie_uid_helper_example.o
134 always-y += tcp_cong_kern.o !! 114
135 always-y += tcp_iw_kern.o !! 115 HOSTCFLAGS += -I$(objtree)/usr/include
136 always-y += tcp_clamp_kern.o !! 116 HOSTCFLAGS += -I$(srctree)/tools/lib/
137 always-y += tcp_basertt_kern.o !! 117 HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
138 always-y += tcp_tos_reflect_kern.o !! 118 HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
139 always-y += tcp_dumpstats_kern.o !! 119 HOSTCFLAGS += -I$(srctree)/tools/perf
140 always-y += xdp2skb_meta_kern.o !! 120
141 always-y += syscall_tp_kern.o !! 121 HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
142 always-y += cpustat_kern.o !! 122 HOSTLOADLIBES_fds_example += -lelf
143 always-y += xdp_adjust_tail_kern.o !! 123 HOSTLOADLIBES_sockex1 += -lelf
144 always-y += xdp_fwd_kern.o !! 124 HOSTLOADLIBES_sockex2 += -lelf
145 always-y += task_fd_query_kern.o !! 125 HOSTLOADLIBES_sockex3 += -lelf
146 always-y += ibumad_kern.o !! 126 HOSTLOADLIBES_tracex1 += -lelf
147 always-y += hbm_out_kern.o !! 127 HOSTLOADLIBES_tracex2 += -lelf
148 always-y += hbm_edt_kern.o !! 128 HOSTLOADLIBES_tracex3 += -lelf
149 !! 129 HOSTLOADLIBES_tracex4 += -lelf -lrt
150 TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS) !! 130 HOSTLOADLIBES_tracex5 += -lelf
151 TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS) !! 131 HOSTLOADLIBES_tracex6 += -lelf
152 !! 132 HOSTLOADLIBES_test_cgrp2_sock2 += -lelf
153 ifeq ($(ARCH), arm) !! 133 HOSTLOADLIBES_test_probe_write_user += -lelf
154 # Strip all except -D__LINUX_ARM_ARCH__ option !! 134 HOSTLOADLIBES_trace_output += -lelf -lrt
155 # headers when arm instruction set identificat !! 135 HOSTLOADLIBES_lathist += -lelf
156 ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_AR !! 136 HOSTLOADLIBES_offwaketime += -lelf
157 BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) !! 137 HOSTLOADLIBES_spintest += -lelf
158 TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) !! 138 HOSTLOADLIBES_map_perf_test += -lelf -lrt
159 endif !! 139 HOSTLOADLIBES_test_overhead += -lelf -lrt
160 !! 140 HOSTLOADLIBES_xdp1 += -lelf
161 ifeq ($(ARCH), mips) !! 141 HOSTLOADLIBES_xdp2 += -lelf
162 TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ !! 142 HOSTLOADLIBES_test_current_task_under_cgroup += -lelf
163 ifdef CONFIG_MACH_LOONGSON64 !! 143 HOSTLOADLIBES_trace_event += -lelf
164 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/inc !! 144 HOSTLOADLIBES_sampleip += -lelf
165 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/inc !! 145 HOSTLOADLIBES_tc_l2_redirect += -l elf
166 endif !! 146 HOSTLOADLIBES_lwt_len_hist += -l elf
167 endif !! 147 HOSTLOADLIBES_xdp_tx_iptunnel += -lelf
168 !! 148 HOSTLOADLIBES_test_map_in_map += -lelf
169 ifeq ($(ARCH), x86) <<
170 BPF_EXTRA_CFLAGS += -fcf-protection <<
171 endif <<
172 <<
173 TPROGS_CFLAGS += -Wall -O2 <<
174 TPROGS_CFLAGS += -Wmissing-prototypes <<
175 TPROGS_CFLAGS += -Wstrict-prototypes <<
176 TPROGS_CFLAGS += $(call try-run,\ <<
177 printf "int main() { return 0; }" |\ <<
178 $(CC) -Werror -fsanitize=bounds -x c - <<
179 <<
180 TPROGS_CFLAGS += -I$(objtree)/usr/include <<
181 TPROGS_CFLAGS += -I$(srctree)/tools/testing/se <<
182 TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) <<
183 TPROGS_CFLAGS += -I$(srctree)/tools/include <<
184 TPROGS_CFLAGS += -I$(srctree)/tools/perf <<
185 TPROGS_CFLAGS += -I$(srctree)/tools/lib <<
186 TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 <<
187 <<
188 ifdef SYSROOT <<
189 TPROGS_CFLAGS += --sysroot=$(SYSROOT) <<
190 TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib <<
191 endif <<
192 <<
193 TPROGS_LDLIBS += $(LIBBPF) - <<
194 TPROGLDLIBS_xdp_router_ipv4 += -lm -pthrea <<
195 TPROGLDLIBS_tracex4 += -lrt <<
196 TPROGLDLIBS_trace_output += -lrt <<
197 TPROGLDLIBS_map_perf_test += -lrt <<
198 TPROGLDLIBS_test_overhead += -lrt <<
199 149
200 # Allows pointing LLC/CLANG to a LLVM backend 150 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
201 # make M=samples/bpf LLC=~/git/llvm-project/ll !! 151 # make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
202 LLC ?= llc 152 LLC ?= llc
203 CLANG ?= clang 153 CLANG ?= clang
204 OPT ?= opt <<
205 LLVM_DIS ?= llvm-dis <<
206 LLVM_OBJCOPY ?= llvm-objcopy <<
207 LLVM_READELF ?= llvm-readelf <<
208 BTF_PAHOLE ?= pahole <<
209 <<
210 # Detect that we're cross compiling and use th <<
211 ifdef CROSS_COMPILE <<
212 CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_CO <<
213 endif <<
214 <<
215 # Don't evaluate probes and warnings if we nee <<
216 ifneq ($(src),) <<
217 HDR_PROBE := $(shell printf "$(pound)include < <<
218 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAG <<
219 -o /dev/null 2>/dev/null && echo okay) <<
220 <<
221 ifeq ($(HDR_PROBE),) <<
222 $(warning WARNING: Detected possible issues wi <<
223 $(warning WARNING: Please install kernel heade <<
224 endif <<
225 <<
226 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -ma <<
227 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --he <<
228 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) - <<
229 BTF_LLVM_PROBE := $(shell echo "int main() { r <<
230 $(CLANG) --target=bp <<
231 $(LLVM_READELF) -S . <<
232 /bin/rm -f ./llvm_bt <<
233 <<
234 BPF_EXTRA_CFLAGS += -fno-stack-protector <<
235 ifneq ($(BTF_LLVM_PROBE),) <<
236 BPF_EXTRA_CFLAGS += -g <<
237 else <<
238 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PRO <<
239 BPF_EXTRA_CFLAGS += -g <<
240 LLC_FLAGS += -mattr=dwarfris <<
241 DWARF2BTF = y <<
242 endif <<
243 endif <<
244 endif <<
245 154
246 # Trick to allow make to be run from this dire 155 # Trick to allow make to be run from this directory
247 all: 156 all:
248 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMP !! 157 $(MAKE) -C ../../ $(CURDIR)/
249 158
250 clean: 159 clean:
251 $(MAKE) -C ../../ M=$(CURDIR) clean 160 $(MAKE) -C ../../ M=$(CURDIR) clean
252 @find $(CURDIR) -type f -name '*~' -de !! 161 @rm -f *~
253 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/b <<
254 <<
255 $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(L <<
256 # Fix up variables inherited from Kbuild that <<
257 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' E <<
258 LDFLAGS="$(TPROGS_LDFLAGS)" sr <<
259 O= OUTPUT=$(LIBBPF_OUTPUT)/ DE <<
260 $@ install_headers <<
261 <<
262 BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool <<
263 BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH <<
264 DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap <<
265 BPFTOOL ?= $(DEFAULT_BPFTOOL) <<
266 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/* <<
267 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF <<
268 OUTPUT=$(BPFTOOL_OUTPUT)/ boot <<
269 <<
270 $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): <<
271 $(call msg,MKDIR,$@) <<
272 $(Q)mkdir -p $@ <<
273 <<
274 $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s F <<
275 $(call filechk,offsets,__SYSCALL_NRS_H <<
276 <<
277 targets += syscall_nrs.s <<
278 clean-files += syscall_nrs.h <<
279 <<
280 FORCE: <<
281 <<
282 162
283 # Verify LLVM compiler tools are available and 163 # Verify LLVM compiler tools are available and bpf target is supported by llc
284 .PHONY: verify_cmds verify_target_bpf $(CLANG) 164 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
285 165
286 verify_cmds: $(CLANG) $(LLC) 166 verify_cmds: $(CLANG) $(LLC)
287 @for TOOL in $^ ; do \ 167 @for TOOL in $^ ; do \
288 if ! (which -- "$${TOOL}" > /d 168 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
289 echo "*** ERROR: Canno 169 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
290 exit 1; \ 170 exit 1; \
291 else true; fi; \ 171 else true; fi; \
292 done 172 done
293 173
294 verify_target_bpf: verify_cmds 174 verify_target_bpf: verify_cmds
295 @if ! (${LLC} -march=bpf -mattr=help > 175 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
296 echo "*** ERROR: LLVM (${LLC}) 176 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
297 echo " NOTICE: LLVM version 177 echo " NOTICE: LLVM version >= 3.7.1 required" ;\
298 exit 2; \ 178 exit 2; \
299 else true; fi 179 else true; fi
300 180
301 $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(L !! 181 $(src)/*.c: verify_target_bpf
302 $(src)/*.c: verify_target_bpf $(LIBBPF) <<
303 <<
304 libbpf_hdrs: $(LIBBPF) <<
305 $(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPER <<
306 <<
307 .PHONY: libbpf_hdrs <<
308 <<
309 $(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_rout <<
310 <<
311 $(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h <<
312 $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm <<
313 $(obj)/hbm.o: $(src)/hbm.h <<
314 $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm <<
315 <<
316 # Override includes for xdp_sample_user.o beca <<
317 # TPROGS_CFLAGS causes conflicts <<
318 XDP_SAMPLE_CFLAGS += -Wall -O2 \ <<
319 -I$(src)/../../tools/incl <<
320 -I$(src)/../../tools/incl <<
321 -I$(LIBBPF_INCLUDE) \ <<
322 -I$(src)/../../tools/test <<
323 <<
324 $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SA <<
325 $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h <<
326 # Override includes for trace_helpers.o becaus <<
327 # in our include path. <<
328 $(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TP <<
329 <<
330 -include $(BPF_SAMPLES_PATH)/Makefile.target <<
331 <<
332 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/ <<
333 $(abspath $(if $(KBUILD_O <<
334 $(abspath ./vmlinux) <<
335 VMLINUX_BTF ?= $(abspath $(firstword $(wildcar <<
336 <<
337 $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) <<
338 ifeq ($(VMLINUX_H),) <<
339 ifeq ($(VMLINUX_BTF),) <<
340 $(error Cannot find a vmlinux for VMLI <<
341 build the kernel or set VMLINU <<
342 endif <<
343 $(Q)$(BPFTOOL) btf dump file $(VMLINUX <<
344 else <<
345 $(Q)cp "$(VMLINUX_H)" $@ <<
346 endif <<
347 <<
348 clean-files += vmlinux.h <<
349 <<
350 # Get Clang's default includes on this system, <<
351 # '--target=bpf'. This fixes "missing" files o <<
352 # such as asm/byteorder.h, asm/socket.h, asm/s <<
353 # <<
354 # Use '-idirafter': Don't interfere with inclu <<
355 # build would have failed anyways. <<
356 define get_sys_includes <<
357 $(shell $(1) -v -E - </dev/null 2>&1 \ <<
358 | sed -n '/<...> search starts here:/, <<
359 $(shell $(1) -dM -E - </dev/null | grep '#defi <<
360 endef <<
361 <<
362 CLANG_SYS_INCLUDES = $(call get_sys_includes,$ <<
363 <<
364 $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sampl <<
365 <<
366 $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux. <<
367 @echo " CLANG-BPF " $@ <<
368 $(Q)$(CLANG) -g -O2 --target=bpf -D__T <<
369 -Wno-compare-distinct-pointer- <<
370 -I$(srctree)/samples/bpf -I$(s <<
371 -I$(LIBBPF_INCLUDE) $(CLANG_SY <<
372 -c $(filter %.bpf.c,$^) -o $@ <<
373 <<
374 LINKED_SKELS := xdp_router_ipv4.skel.h <<
375 clean-files += $(LINKED_SKELS) <<
376 <<
377 xdp_router_ipv4.skel.h-deps := xdp_router_ipv4 <<
378 <<
379 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c, <<
380 <<
381 BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/ <<
382 BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/% <<
383 BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINK <<
384 <<
385 $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFT <<
386 @echo " BPF GEN-OBJ " $(@:.skel.h=) <<
387 $(Q)$(BPFTOOL) gen object $(@:.skel.h= <<
388 @echo " BPF GEN-SKEL" $(@:.skel.h=) <<
389 $(Q)$(BPFTOOL) gen skeleton $(@:.skel. <<
390 182
391 # asm/sysreg.h - inline assembly used by it is 183 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
392 # But, there is no easy way to fix it, so just 184 # But, there is no easy way to fix it, so just exclude it since it is
393 # useless for BPF samples. 185 # useless for BPF samples.
394 # below we use long chain of commands, clang | <<
395 # to generate final object file. 'clang' compi <<
396 # with native target, e.g., x64, arm64, etc. ' <<
397 # processing (llvm12) and IR optimizations. 'l <<
398 # 'opt' output to IR, and finally 'llc' genera <<
399 $(obj)/%.o: $(src)/%.c 186 $(obj)/%.o: $(src)/%.c
400 @echo " CLANG-bpf " $@ !! 187 $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
401 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUX !! 188 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
402 -I$(obj) -I$(srctree)/tools/te !! 189 -Wno-compare-distinct-pointer-types \
403 -I$(LIBBPF_INCLUDE) \ <<
404 -D__KERNEL__ -D__BPF_TRACING__ <<
405 -D__TARGET_ARCH_$(SRCARCH) -Wn <<
406 -Wno-gnu-variable-sized-type-n 190 -Wno-gnu-variable-sized-type-not-at-end \
407 -Wno-address-of-packed-member 191 -Wno-address-of-packed-member -Wno-tautological-compare \
408 -Wno-unknown-warning-option $( !! 192 -Wno-unknown-warning-option \
409 -fno-asynchronous-unwind-table !! 193 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
410 -I$(srctree)/samples/bpf/ -inc <<
411 -O2 -emit-llvm -Xclang -disabl <<
412 $(OPT) -O2 -mtriple=bpf-pc-lin <<
413 $(LLC) -march=bpf $(LLC_FLAGS) <<
414 ifeq ($(DWARF2BTF),y) <<
415 $(BTF_PAHOLE) -J $@ <<
416 endif <<
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