1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 2
3 BPF_SAMPLES_PATH ?= $(abspath $(src)) !! 3 BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
4 TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools 4 TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
5 5
6 pound := \# 6 pound := \#
7 7
8 # List of programs to build 8 # List of programs to build
9 tprogs-y := test_lru_dist 9 tprogs-y := test_lru_dist
10 tprogs-y += sock_example 10 tprogs-y += sock_example
11 tprogs-y += fds_example 11 tprogs-y += fds_example
12 tprogs-y += sockex1 12 tprogs-y += sockex1
13 tprogs-y += sockex2 13 tprogs-y += sockex2
14 tprogs-y += sockex3 14 tprogs-y += sockex3
15 tprogs-y += tracex1 15 tprogs-y += tracex1
>> 16 tprogs-y += tracex2
16 tprogs-y += tracex3 17 tprogs-y += tracex3
17 tprogs-y += tracex4 18 tprogs-y += tracex4
18 tprogs-y += tracex5 19 tprogs-y += tracex5
19 tprogs-y += tracex6 20 tprogs-y += tracex6
20 tprogs-y += tracex7 21 tprogs-y += tracex7
21 tprogs-y += test_probe_write_user 22 tprogs-y += test_probe_write_user
22 tprogs-y += trace_output 23 tprogs-y += trace_output
23 tprogs-y += lathist 24 tprogs-y += lathist
24 tprogs-y += offwaketime 25 tprogs-y += offwaketime
25 tprogs-y += spintest 26 tprogs-y += spintest
26 tprogs-y += map_perf_test 27 tprogs-y += map_perf_test
27 tprogs-y += test_overhead 28 tprogs-y += test_overhead
28 tprogs-y += test_cgrp2_array_pin 29 tprogs-y += test_cgrp2_array_pin
29 tprogs-y += test_cgrp2_attach 30 tprogs-y += test_cgrp2_attach
30 tprogs-y += test_cgrp2_sock 31 tprogs-y += test_cgrp2_sock
31 tprogs-y += test_cgrp2_sock2 32 tprogs-y += test_cgrp2_sock2
32 tprogs-y += xdp_router_ipv4 33 tprogs-y += xdp_router_ipv4
33 tprogs-y += test_current_task_under_cgroup 34 tprogs-y += test_current_task_under_cgroup
34 tprogs-y += trace_event 35 tprogs-y += trace_event
35 tprogs-y += sampleip 36 tprogs-y += sampleip
36 tprogs-y += tc_l2_redirect 37 tprogs-y += tc_l2_redirect
37 tprogs-y += lwt_len_hist 38 tprogs-y += lwt_len_hist
38 tprogs-y += xdp_tx_iptunnel 39 tprogs-y += xdp_tx_iptunnel
39 tprogs-y += test_map_in_map 40 tprogs-y += test_map_in_map
40 tprogs-y += per_socket_stats_example 41 tprogs-y += per_socket_stats_example
41 tprogs-y += syscall_tp 42 tprogs-y += syscall_tp
42 tprogs-y += cpustat 43 tprogs-y += cpustat
43 tprogs-y += xdp_adjust_tail 44 tprogs-y += xdp_adjust_tail
44 tprogs-y += xdp_fwd 45 tprogs-y += xdp_fwd
45 tprogs-y += task_fd_query 46 tprogs-y += task_fd_query
46 tprogs-y += ibumad 47 tprogs-y += ibumad
47 tprogs-y += hbm 48 tprogs-y += hbm
48 49
49 # Libbpf dependencies 50 # Libbpf dependencies
50 LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf 51 LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf
51 LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH)) 52 LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf
52 LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) 53 LIBBPF_DESTDIR = $(LIBBPF_OUTPUT)
53 LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include 54 LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
54 LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a 55 LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a
55 56
56 CGROUP_HELPERS := ../../tools/testing/selftest 57 CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
57 TRACE_HELPERS := ../../tools/testing/selftests 58 TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
58 XDP_SAMPLE := xdp_sample_user.o 59 XDP_SAMPLE := xdp_sample_user.o
59 60
60 fds_example-objs := fds_example.o 61 fds_example-objs := fds_example.o
61 sockex1-objs := sockex1_user.o 62 sockex1-objs := sockex1_user.o
62 sockex2-objs := sockex2_user.o 63 sockex2-objs := sockex2_user.o
63 sockex3-objs := sockex3_user.o 64 sockex3-objs := sockex3_user.o
64 tracex1-objs := tracex1_user.o $(TRACE_HELPERS 65 tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
>> 66 tracex2-objs := tracex2_user.o
65 tracex3-objs := tracex3_user.o 67 tracex3-objs := tracex3_user.o
66 tracex4-objs := tracex4_user.o 68 tracex4-objs := tracex4_user.o
67 tracex5-objs := tracex5_user.o $(TRACE_HELPERS 69 tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
68 tracex6-objs := tracex6_user.o 70 tracex6-objs := tracex6_user.o
69 tracex7-objs := tracex7_user.o 71 tracex7-objs := tracex7_user.o
70 test_probe_write_user-objs := test_probe_write 72 test_probe_write_user-objs := test_probe_write_user_user.o
71 trace_output-objs := trace_output_user.o 73 trace_output-objs := trace_output_user.o
72 lathist-objs := lathist_user.o 74 lathist-objs := lathist_user.o
73 offwaketime-objs := offwaketime_user.o $(TRACE 75 offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
74 spintest-objs := spintest_user.o $(TRACE_HELPE 76 spintest-objs := spintest_user.o $(TRACE_HELPERS)
75 map_perf_test-objs := map_perf_test_user.o 77 map_perf_test-objs := map_perf_test_user.o
76 test_overhead-objs := test_overhead_user.o 78 test_overhead-objs := test_overhead_user.o
77 test_cgrp2_array_pin-objs := test_cgrp2_array_ 79 test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
78 test_cgrp2_attach-objs := test_cgrp2_attach.o 80 test_cgrp2_attach-objs := test_cgrp2_attach.o
79 test_cgrp2_sock-objs := test_cgrp2_sock.o 81 test_cgrp2_sock-objs := test_cgrp2_sock.o
80 test_cgrp2_sock2-objs := test_cgrp2_sock2.o 82 test_cgrp2_sock2-objs := test_cgrp2_sock2.o
81 test_current_task_under_cgroup-objs := $(CGROU 83 test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
82 test_cu 84 test_current_task_under_cgroup_user.o
83 trace_event-objs := trace_event_user.o $(TRACE 85 trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
84 sampleip-objs := sampleip_user.o $(TRACE_HELPE 86 sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
85 tc_l2_redirect-objs := tc_l2_redirect_user.o 87 tc_l2_redirect-objs := tc_l2_redirect_user.o
86 lwt_len_hist-objs := lwt_len_hist_user.o 88 lwt_len_hist-objs := lwt_len_hist_user.o
87 xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 89 xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
88 test_map_in_map-objs := test_map_in_map_user.o 90 test_map_in_map-objs := test_map_in_map_user.o
89 per_socket_stats_example-objs := cookie_uid_he 91 per_socket_stats_example-objs := cookie_uid_helper_example.o
90 syscall_tp-objs := syscall_tp_user.o 92 syscall_tp-objs := syscall_tp_user.o
91 cpustat-objs := cpustat_user.o 93 cpustat-objs := cpustat_user.o
92 xdp_adjust_tail-objs := xdp_adjust_tail_user.o 94 xdp_adjust_tail-objs := xdp_adjust_tail_user.o
93 xdp_fwd-objs := xdp_fwd_user.o 95 xdp_fwd-objs := xdp_fwd_user.o
94 task_fd_query-objs := task_fd_query_user.o $(T 96 task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
95 ibumad-objs := ibumad_user.o 97 ibumad-objs := ibumad_user.o
96 hbm-objs := hbm.o $(CGROUP_HELPERS) 98 hbm-objs := hbm.o $(CGROUP_HELPERS)
97 99
98 xdp_router_ipv4-objs := xdp_router_ipv4_user.o 100 xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE)
99 101
100 # Tell kbuild to always build the programs 102 # Tell kbuild to always build the programs
101 always-y := $(tprogs-y) 103 always-y := $(tprogs-y)
102 always-y += sockex1_kern.o 104 always-y += sockex1_kern.o
103 always-y += sockex2_kern.o 105 always-y += sockex2_kern.o
104 always-y += sockex3_kern.o 106 always-y += sockex3_kern.o
105 always-y += tracex1.bpf.o 107 always-y += tracex1.bpf.o
>> 108 always-y += tracex2.bpf.o
106 always-y += tracex3.bpf.o 109 always-y += tracex3.bpf.o
107 always-y += tracex4.bpf.o 110 always-y += tracex4.bpf.o
108 always-y += tracex5.bpf.o 111 always-y += tracex5.bpf.o
109 always-y += tracex6.bpf.o 112 always-y += tracex6.bpf.o
110 always-y += tracex7.bpf.o 113 always-y += tracex7.bpf.o
111 always-y += sock_flags.bpf.o 114 always-y += sock_flags.bpf.o
112 always-y += test_probe_write_user.bpf.o 115 always-y += test_probe_write_user.bpf.o
113 always-y += trace_output.bpf.o 116 always-y += trace_output.bpf.o
114 always-y += tcbpf1_kern.o 117 always-y += tcbpf1_kern.o
115 always-y += tc_l2_redirect_kern.o 118 always-y += tc_l2_redirect_kern.o
116 always-y += lathist_kern.o 119 always-y += lathist_kern.o
117 always-y += offwaketime.bpf.o 120 always-y += offwaketime.bpf.o
118 always-y += spintest.bpf.o 121 always-y += spintest.bpf.o
119 always-y += map_perf_test.bpf.o 122 always-y += map_perf_test.bpf.o
120 always-y += test_overhead_tp.bpf.o 123 always-y += test_overhead_tp.bpf.o
121 always-y += test_overhead_raw_tp.bpf.o 124 always-y += test_overhead_raw_tp.bpf.o
122 always-y += test_overhead_kprobe.bpf.o 125 always-y += test_overhead_kprobe.bpf.o
123 always-y += parse_varlen.o parse_simple.o pars 126 always-y += parse_varlen.o parse_simple.o parse_ldabs.o
124 always-y += test_cgrp2_tc.bpf.o 127 always-y += test_cgrp2_tc.bpf.o
125 always-y += test_current_task_under_cgroup.bpf 128 always-y += test_current_task_under_cgroup.bpf.o
126 always-y += trace_event_kern.o 129 always-y += trace_event_kern.o
127 always-y += sampleip_kern.o 130 always-y += sampleip_kern.o
128 always-y += lwt_len_hist.bpf.o 131 always-y += lwt_len_hist.bpf.o
129 always-y += xdp_tx_iptunnel_kern.o 132 always-y += xdp_tx_iptunnel_kern.o
130 always-y += test_map_in_map.bpf.o 133 always-y += test_map_in_map.bpf.o
131 always-y += tcp_synrto_kern.o 134 always-y += tcp_synrto_kern.o
132 always-y += tcp_rwnd_kern.o 135 always-y += tcp_rwnd_kern.o
133 always-y += tcp_bufs_kern.o 136 always-y += tcp_bufs_kern.o
134 always-y += tcp_cong_kern.o 137 always-y += tcp_cong_kern.o
135 always-y += tcp_iw_kern.o 138 always-y += tcp_iw_kern.o
136 always-y += tcp_clamp_kern.o 139 always-y += tcp_clamp_kern.o
137 always-y += tcp_basertt_kern.o 140 always-y += tcp_basertt_kern.o
138 always-y += tcp_tos_reflect_kern.o 141 always-y += tcp_tos_reflect_kern.o
139 always-y += tcp_dumpstats_kern.o 142 always-y += tcp_dumpstats_kern.o
140 always-y += xdp2skb_meta_kern.o 143 always-y += xdp2skb_meta_kern.o
141 always-y += syscall_tp_kern.o 144 always-y += syscall_tp_kern.o
142 always-y += cpustat_kern.o 145 always-y += cpustat_kern.o
143 always-y += xdp_adjust_tail_kern.o 146 always-y += xdp_adjust_tail_kern.o
144 always-y += xdp_fwd_kern.o 147 always-y += xdp_fwd_kern.o
145 always-y += task_fd_query_kern.o 148 always-y += task_fd_query_kern.o
146 always-y += ibumad_kern.o 149 always-y += ibumad_kern.o
147 always-y += hbm_out_kern.o 150 always-y += hbm_out_kern.o
148 always-y += hbm_edt_kern.o 151 always-y += hbm_edt_kern.o
149 152
150 TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS) <<
151 TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS) <<
152 <<
153 ifeq ($(ARCH), arm) 153 ifeq ($(ARCH), arm)
154 # Strip all except -D__LINUX_ARM_ARCH__ option 154 # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
155 # headers when arm instruction set identificat 155 # headers when arm instruction set identification is requested.
156 ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_AR 156 ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
157 BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 157 BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
158 TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 158 TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
159 endif 159 endif
160 160
161 ifeq ($(ARCH), mips) 161 ifeq ($(ARCH), mips)
162 TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ 162 TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__
163 ifdef CONFIG_MACH_LOONGSON64 163 ifdef CONFIG_MACH_LOONGSON64
164 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/inc 164 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64
165 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/inc 165 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic
166 endif 166 endif
167 endif 167 endif
168 168
169 ifeq ($(ARCH), x86) 169 ifeq ($(ARCH), x86)
170 BPF_EXTRA_CFLAGS += -fcf-protection 170 BPF_EXTRA_CFLAGS += -fcf-protection
171 endif 171 endif
172 172
173 TPROGS_CFLAGS += -Wall -O2 173 TPROGS_CFLAGS += -Wall -O2
174 TPROGS_CFLAGS += -Wmissing-prototypes 174 TPROGS_CFLAGS += -Wmissing-prototypes
175 TPROGS_CFLAGS += -Wstrict-prototypes 175 TPROGS_CFLAGS += -Wstrict-prototypes
176 TPROGS_CFLAGS += $(call try-run,\ <<
177 printf "int main() { return 0; }" |\ <<
178 $(CC) -Werror -fsanitize=bounds -x c - <<
179 176
180 TPROGS_CFLAGS += -I$(objtree)/usr/include 177 TPROGS_CFLAGS += -I$(objtree)/usr/include
181 TPROGS_CFLAGS += -I$(srctree)/tools/testing/se 178 TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
182 TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) 179 TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE)
183 TPROGS_CFLAGS += -I$(srctree)/tools/include 180 TPROGS_CFLAGS += -I$(srctree)/tools/include
184 TPROGS_CFLAGS += -I$(srctree)/tools/perf 181 TPROGS_CFLAGS += -I$(srctree)/tools/perf
185 TPROGS_CFLAGS += -I$(srctree)/tools/lib <<
186 TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 182 TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
187 183
188 ifdef SYSROOT 184 ifdef SYSROOT
189 TPROGS_CFLAGS += --sysroot=$(SYSROOT) 185 TPROGS_CFLAGS += --sysroot=$(SYSROOT)
190 TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 186 TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
191 endif 187 endif
192 188
193 TPROGS_LDLIBS += $(LIBBPF) - 189 TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
194 TPROGLDLIBS_xdp_router_ipv4 += -lm -pthrea 190 TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread
195 TPROGLDLIBS_tracex4 += -lrt 191 TPROGLDLIBS_tracex4 += -lrt
196 TPROGLDLIBS_trace_output += -lrt 192 TPROGLDLIBS_trace_output += -lrt
197 TPROGLDLIBS_map_perf_test += -lrt 193 TPROGLDLIBS_map_perf_test += -lrt
198 TPROGLDLIBS_test_overhead += -lrt 194 TPROGLDLIBS_test_overhead += -lrt
199 195
200 # Allows pointing LLC/CLANG to a LLVM backend 196 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
201 # make M=samples/bpf LLC=~/git/llvm-project/ll 197 # make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
202 LLC ?= llc 198 LLC ?= llc
203 CLANG ?= clang 199 CLANG ?= clang
204 OPT ?= opt 200 OPT ?= opt
205 LLVM_DIS ?= llvm-dis 201 LLVM_DIS ?= llvm-dis
206 LLVM_OBJCOPY ?= llvm-objcopy 202 LLVM_OBJCOPY ?= llvm-objcopy
207 LLVM_READELF ?= llvm-readelf 203 LLVM_READELF ?= llvm-readelf
208 BTF_PAHOLE ?= pahole 204 BTF_PAHOLE ?= pahole
209 205
210 # Detect that we're cross compiling and use th 206 # Detect that we're cross compiling and use the cross compiler
211 ifdef CROSS_COMPILE 207 ifdef CROSS_COMPILE
212 CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_CO 208 CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
213 endif 209 endif
214 210
215 # Don't evaluate probes and warnings if we nee 211 # Don't evaluate probes and warnings if we need to run make recursively
216 ifneq ($(src),) 212 ifneq ($(src),)
217 HDR_PROBE := $(shell printf "$(pound)include < 213 HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
218 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAG 214 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
219 -o /dev/null 2>/dev/null && echo okay) 215 -o /dev/null 2>/dev/null && echo okay)
220 216
221 ifeq ($(HDR_PROBE),) 217 ifeq ($(HDR_PROBE),)
222 $(warning WARNING: Detected possible issues wi 218 $(warning WARNING: Detected possible issues with include path.)
223 $(warning WARNING: Please install kernel heade 219 $(warning WARNING: Please install kernel headers locally (make headers_install).)
224 endif 220 endif
225 221
226 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -ma 222 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
227 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --he 223 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
228 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) - 224 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
229 BTF_LLVM_PROBE := $(shell echo "int main() { r 225 BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
230 $(CLANG) --target=bp 226 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
231 $(LLVM_READELF) -S . 227 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
232 /bin/rm -f ./llvm_bt 228 /bin/rm -f ./llvm_btf_verify.o)
233 229
234 BPF_EXTRA_CFLAGS += -fno-stack-protector 230 BPF_EXTRA_CFLAGS += -fno-stack-protector
235 ifneq ($(BTF_LLVM_PROBE),) 231 ifneq ($(BTF_LLVM_PROBE),)
236 BPF_EXTRA_CFLAGS += -g 232 BPF_EXTRA_CFLAGS += -g
237 else 233 else
238 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PRO 234 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
239 BPF_EXTRA_CFLAGS += -g 235 BPF_EXTRA_CFLAGS += -g
240 LLC_FLAGS += -mattr=dwarfris 236 LLC_FLAGS += -mattr=dwarfris
241 DWARF2BTF = y 237 DWARF2BTF = y
242 endif 238 endif
243 endif 239 endif
244 endif 240 endif
245 241
246 # Trick to allow make to be run from this dire 242 # Trick to allow make to be run from this directory
247 all: 243 all:
248 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMP 244 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
249 245
250 clean: 246 clean:
251 $(MAKE) -C ../../ M=$(CURDIR) clean 247 $(MAKE) -C ../../ M=$(CURDIR) clean
252 @find $(CURDIR) -type f -name '*~' -de 248 @find $(CURDIR) -type f -name '*~' -delete
253 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/b 249 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool
254 250
255 $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(L 251 $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
256 # Fix up variables inherited from Kbuild that 252 # Fix up variables inherited from Kbuild that tools/ build system won't like
257 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' E 253 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
258 LDFLAGS="$(TPROGS_LDFLAGS)" sr !! 254 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \
259 O= OUTPUT=$(LIBBPF_OUTPUT)/ DE 255 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
260 $@ install_headers 256 $@ install_headers
261 257
262 BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 258 BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
263 BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH 259 BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
264 DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap !! 260 BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
265 BPFTOOL ?= $(DEFAULT_BPFTOOL) !! 261 $(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
266 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/* <<
267 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF 262 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \
268 OUTPUT=$(BPFTOOL_OUTPUT)/ boot 263 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
269 264
270 $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 265 $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
271 $(call msg,MKDIR,$@) 266 $(call msg,MKDIR,$@)
272 $(Q)mkdir -p $@ 267 $(Q)mkdir -p $@
273 268
274 $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s F 269 $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
275 $(call filechk,offsets,__SYSCALL_NRS_H 270 $(call filechk,offsets,__SYSCALL_NRS_H__)
276 271
277 targets += syscall_nrs.s 272 targets += syscall_nrs.s
278 clean-files += syscall_nrs.h 273 clean-files += syscall_nrs.h
279 274
280 FORCE: 275 FORCE:
281 276
282 277
283 # Verify LLVM compiler tools are available and 278 # Verify LLVM compiler tools are available and bpf target is supported by llc
284 .PHONY: verify_cmds verify_target_bpf $(CLANG) 279 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
285 280
286 verify_cmds: $(CLANG) $(LLC) 281 verify_cmds: $(CLANG) $(LLC)
287 @for TOOL in $^ ; do \ 282 @for TOOL in $^ ; do \
288 if ! (which -- "$${TOOL}" > /d 283 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
289 echo "*** ERROR: Canno 284 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
290 exit 1; \ 285 exit 1; \
291 else true; fi; \ 286 else true; fi; \
292 done 287 done
293 288
294 verify_target_bpf: verify_cmds 289 verify_target_bpf: verify_cmds
295 @if ! (${LLC} -march=bpf -mattr=help > 290 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
296 echo "*** ERROR: LLVM (${LLC}) 291 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
297 echo " NOTICE: LLVM version 292 echo " NOTICE: LLVM version >= 3.7.1 required" ;\
298 exit 2; \ 293 exit 2; \
299 else true; fi 294 else true; fi
300 295
301 $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(L 296 $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
302 $(src)/*.c: verify_target_bpf $(LIBBPF) 297 $(src)/*.c: verify_target_bpf $(LIBBPF)
303 298
304 libbpf_hdrs: $(LIBBPF) 299 libbpf_hdrs: $(LIBBPF)
305 $(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPER 300 $(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs
306 301
307 .PHONY: libbpf_hdrs 302 .PHONY: libbpf_hdrs
308 303
309 $(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_rout 304 $(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h
310 305
311 $(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h 306 $(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h
312 $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm 307 $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
313 $(obj)/hbm.o: $(src)/hbm.h 308 $(obj)/hbm.o: $(src)/hbm.h
314 $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm 309 $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
315 310
316 # Override includes for xdp_sample_user.o beca 311 # Override includes for xdp_sample_user.o because $(srctree)/usr/include in
317 # TPROGS_CFLAGS causes conflicts 312 # TPROGS_CFLAGS causes conflicts
318 XDP_SAMPLE_CFLAGS += -Wall -O2 \ 313 XDP_SAMPLE_CFLAGS += -Wall -O2 \
319 -I$(src)/../../tools/incl 314 -I$(src)/../../tools/include \
320 -I$(src)/../../tools/incl 315 -I$(src)/../../tools/include/uapi \
321 -I$(LIBBPF_INCLUDE) \ 316 -I$(LIBBPF_INCLUDE) \
322 -I$(src)/../../tools/test 317 -I$(src)/../../tools/testing/selftests/bpf
323 318
324 $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SA !! 319 $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS)
325 $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h 320 $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
326 # Override includes for trace_helpers.o becaus <<
327 # in our include path. <<
328 $(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TP <<
329 321
330 -include $(BPF_SAMPLES_PATH)/Makefile.target 322 -include $(BPF_SAMPLES_PATH)/Makefile.target
331 323
332 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/ 324 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \
333 $(abspath $(if $(KBUILD_O 325 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \
334 $(abspath ./vmlinux) 326 $(abspath ./vmlinux)
335 VMLINUX_BTF ?= $(abspath $(firstword $(wildcar 327 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
336 328
337 $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) 329 $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)
338 ifeq ($(VMLINUX_H),) 330 ifeq ($(VMLINUX_H),)
339 ifeq ($(VMLINUX_BTF),) 331 ifeq ($(VMLINUX_BTF),)
340 $(error Cannot find a vmlinux for VMLI 332 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\
341 build the kernel or set VMLINU !! 333 build the kernel or set VMLINUX_BTF or VMLINUX_H variable)
342 endif 334 endif
343 $(Q)$(BPFTOOL) btf dump file $(VMLINUX 335 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
344 else 336 else
345 $(Q)cp "$(VMLINUX_H)" $@ 337 $(Q)cp "$(VMLINUX_H)" $@
346 endif 338 endif
347 339
348 clean-files += vmlinux.h 340 clean-files += vmlinux.h
349 341
350 # Get Clang's default includes on this system, 342 # Get Clang's default includes on this system, as opposed to those seen by
351 # '--target=bpf'. This fixes "missing" files o 343 # '--target=bpf'. This fixes "missing" files on some architectures/distros,
352 # such as asm/byteorder.h, asm/socket.h, asm/s 344 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
353 # 345 #
354 # Use '-idirafter': Don't interfere with inclu 346 # Use '-idirafter': Don't interfere with include mechanics except where the
355 # build would have failed anyways. 347 # build would have failed anyways.
356 define get_sys_includes 348 define get_sys_includes
357 $(shell $(1) -v -E - </dev/null 2>&1 \ 349 $(shell $(1) -v -E - </dev/null 2>&1 \
358 | sed -n '/<...> search starts here:/, 350 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
359 $(shell $(1) -dM -E - </dev/null | grep '#defi 351 $(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
360 endef 352 endef
361 353
362 CLANG_SYS_INCLUDES = $(call get_sys_includes,$ 354 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
363 355
364 $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sampl 356 $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o
365 357
366 $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux. 358 $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h
367 @echo " CLANG-BPF " $@ 359 @echo " CLANG-BPF " $@
368 $(Q)$(CLANG) -g -O2 --target=bpf -D__T 360 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \
369 -Wno-compare-distinct-pointer- 361 -Wno-compare-distinct-pointer-types -I$(srctree)/include \
370 -I$(srctree)/samples/bpf -I$(s 362 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \
371 -I$(LIBBPF_INCLUDE) $(CLANG_SY 363 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \
372 -c $(filter %.bpf.c,$^) -o $@ 364 -c $(filter %.bpf.c,$^) -o $@
373 365
374 LINKED_SKELS := xdp_router_ipv4.skel.h 366 LINKED_SKELS := xdp_router_ipv4.skel.h
375 clean-files += $(LINKED_SKELS) 367 clean-files += $(LINKED_SKELS)
376 368
377 xdp_router_ipv4.skel.h-deps := xdp_router_ipv4 369 xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o
378 370
379 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c, 371 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
380 372
381 BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/ 373 BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c))
382 BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/% 374 BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED))
383 BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINK 375 BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS))
384 376
385 $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFT 377 $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL)
386 @echo " BPF GEN-OBJ " $(@:.skel.h=) 378 @echo " BPF GEN-OBJ " $(@:.skel.h=)
387 $(Q)$(BPFTOOL) gen object $(@:.skel.h= 379 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps))
388 @echo " BPF GEN-SKEL" $(@:.skel.h=) 380 @echo " BPF GEN-SKEL" $(@:.skel.h=)
389 $(Q)$(BPFTOOL) gen skeleton $(@:.skel. 381 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@
390 382
391 # asm/sysreg.h - inline assembly used by it is 383 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
392 # But, there is no easy way to fix it, so just 384 # But, there is no easy way to fix it, so just exclude it since it is
393 # useless for BPF samples. 385 # useless for BPF samples.
394 # below we use long chain of commands, clang | 386 # below we use long chain of commands, clang | opt | llvm-dis | llc,
395 # to generate final object file. 'clang' compi 387 # to generate final object file. 'clang' compiles the source into IR
396 # with native target, e.g., x64, arm64, etc. ' 388 # with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
397 # processing (llvm12) and IR optimizations. 'l 389 # processing (llvm12) and IR optimizations. 'llvm-dis' converts
398 # 'opt' output to IR, and finally 'llc' genera 390 # 'opt' output to IR, and finally 'llc' generates bpf byte code.
399 $(obj)/%.o: $(src)/%.c 391 $(obj)/%.o: $(src)/%.c
400 @echo " CLANG-bpf " $@ 392 @echo " CLANG-bpf " $@
401 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUX 393 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
402 -I$(obj) -I$(srctree)/tools/te 394 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
403 -I$(LIBBPF_INCLUDE) \ 395 -I$(LIBBPF_INCLUDE) \
404 -D__KERNEL__ -D__BPF_TRACING__ 396 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
405 -D__TARGET_ARCH_$(SRCARCH) -Wn 397 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
406 -Wno-gnu-variable-sized-type-n 398 -Wno-gnu-variable-sized-type-not-at-end \
407 -Wno-address-of-packed-member 399 -Wno-address-of-packed-member -Wno-tautological-compare \
408 -Wno-unknown-warning-option $( 400 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
409 -fno-asynchronous-unwind-table 401 -fno-asynchronous-unwind-tables \
410 -I$(srctree)/samples/bpf/ -inc 402 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
411 -O2 -emit-llvm -Xclang -disabl 403 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
412 $(OPT) -O2 -mtriple=bpf-pc-lin 404 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
413 $(LLC) -march=bpf $(LLC_FLAGS) 405 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
414 ifeq ($(DWARF2BTF),y) 406 ifeq ($(DWARF2BTF),y)
415 $(BTF_PAHOLE) -J $@ 407 $(BTF_PAHOLE) -J $@
416 endif 408 endif
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