xref: /linux/tools/testing/selftests/bpf/Makefile (revision be709d48329a500621d2a05835283150ae137b45) 
1# SPDX-License-Identifier: GPL-2.0
2
3LIBDIR := ../../../lib
4BPFDIR := $(LIBDIR)/bpf
5APIDIR := ../../../include/uapi
6GENDIR := ../../../../include/generated
7GENHDR := $(GENDIR)/autoconf.h
8
9ifneq ($(wildcard $(GENHDR)),)
10  GENFLAGS := -DHAVE_GENHDR
11endif
12
13CLANG		?= clang
14LLC		?= llc
15LLVM_OBJCOPY	?= llvm-objcopy
16LLVM_READELF	?= llvm-readelf
17BTF_PAHOLE	?= pahole
18CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include
19LDLIBS += -lcap -lelf -lrt -lpthread
20
21# Order correspond to 'make run_tests' order
22TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
23	test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
24	test_sock test_btf test_sockmap test_lirc_mode2_user get_cgroup_id_user \
25	test_socket_cookie test_cgroup_storage test_select_reuseport test_section_names \
26	test_netcnt test_tcpnotify_user test_sock_fields
27
28BPF_OBJ_FILES = $(patsubst %.c,%.o, $(notdir $(wildcard progs/*.c)))
29TEST_GEN_FILES = $(BPF_OBJ_FILES)
30
31# Also test sub-register code-gen if LLVM has eBPF v3 processor support which
32# contains both ALU32 and JMP32 instructions.
33SUBREG_CODEGEN := $(shell echo "int cal(int a) { return a > 0; }" | \
34			$(CLANG) -target bpf -O2 -emit-llvm -S -x c - -o - | \
35			$(LLC) -mattr=+alu32 -mcpu=v3 2>&1 | \
36			grep 'if w')
37ifneq ($(SUBREG_CODEGEN),)
38TEST_GEN_FILES += $(patsubst %.o,alu32/%.o, $(BPF_OBJ_FILES))
39endif
40
41# Order correspond to 'make run_tests' order
42TEST_PROGS := test_kmod.sh \
43	test_libbpf.sh \
44	test_xdp_redirect.sh \
45	test_xdp_meta.sh \
46	test_offload.py \
47	test_sock_addr.sh \
48	test_tunnel.sh \
49	test_lwt_seg6local.sh \
50	test_lirc_mode2.sh \
51	test_skb_cgroup_id.sh \
52	test_flow_dissector.sh \
53	test_xdp_vlan.sh \
54	test_lwt_ip_encap.sh
55
56TEST_PROGS_EXTENDED := with_addr.sh \
57	with_tunnels.sh \
58	tcp_client.py \
59	tcp_server.py
60
61# Compile but not part of 'make run_tests'
62TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr test_skb_cgroup_id_user \
63	flow_dissector_load test_flow_dissector
64
65include ../lib.mk
66
67# NOTE: $(OUTPUT) won't get default value if used before lib.mk
68TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
69all: $(TEST_CUSTOM_PROGS)
70
71$(OUTPUT)/urandom_read: $(OUTPUT)/%: %.c
72	$(CC) -o $@ -static $< -Wl,--build-id
73
74BPFOBJ := $(OUTPUT)/libbpf.a
75
76$(TEST_GEN_PROGS): $(BPFOBJ)
77
78$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/libbpf.a
79
80$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
81$(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
82$(OUTPUT)/test_sock: cgroup_helpers.c
83$(OUTPUT)/test_sock_addr: cgroup_helpers.c
84$(OUTPUT)/test_socket_cookie: cgroup_helpers.c
85$(OUTPUT)/test_sockmap: cgroup_helpers.c
86$(OUTPUT)/test_tcpbpf_user: cgroup_helpers.c
87$(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c
88$(OUTPUT)/test_progs: trace_helpers.c
89$(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
90$(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
91$(OUTPUT)/test_netcnt: cgroup_helpers.c
92$(OUTPUT)/test_sock_fields: cgroup_helpers.c
93
94.PHONY: force
95
96# force a rebuild of BPFOBJ when its dependencies are updated
97force:
98
99$(BPFOBJ): force
100	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
101
102PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
103
104# Let newer LLVM versions transparently probe the kernel for availability
105# of full BPF instruction set.
106ifeq ($(PROBE),)
107  CPU ?= probe
108else
109  CPU ?= generic
110endif
111
112# Get Clang's default includes on this system, as opposed to those seen by
113# '-target bpf'. This fixes "missing" files on some architectures/distros,
114# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
115#
116# Use '-idirafter': Don't interfere with include mechanics except where the
117# build would have failed anyways.
118CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
119	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
120
121CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
122	      $(CLANG_SYS_INCLUDES) \
123	      -Wno-compare-distinct-pointer-types
124
125$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
126$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline
127
128$(OUTPUT)/test_queue_map.o: test_queue_stack_map.h
129$(OUTPUT)/test_stack_map.o: test_queue_stack_map.h
130
131$(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
132$(OUTPUT)/test_progs.o: flow_dissector_load.h
133
134BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
135BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
136BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
137BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
138			  $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
139			  $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
140			  /bin/rm -f ./llvm_btf_verify.o)
141
142ifneq ($(BTF_LLVM_PROBE),)
143	CLANG_FLAGS += -g
144else
145ifneq ($(BTF_LLC_PROBE),)
146ifneq ($(BTF_PAHOLE_PROBE),)
147ifneq ($(BTF_OBJCOPY_PROBE),)
148	CLANG_FLAGS += -g
149	LLC_FLAGS += -mattr=dwarfris
150	DWARF2BTF = y
151endif
152endif
153endif
154endif
155
156TEST_PROGS_CFLAGS := -I. -I$(OUTPUT)
157TEST_VERIFIER_CFLAGS := -I. -I$(OUTPUT) -Iverifier
158
159ifneq ($(SUBREG_CODEGEN),)
160ALU32_BUILD_DIR = $(OUTPUT)/alu32
161TEST_CUSTOM_PROGS += $(ALU32_BUILD_DIR)/test_progs_32
162$(ALU32_BUILD_DIR):
163	mkdir -p $@
164
165$(ALU32_BUILD_DIR)/urandom_read: $(OUTPUT)/urandom_read
166	cp $< $@
167
168$(ALU32_BUILD_DIR)/test_progs_32: test_progs.c $(OUTPUT)/libbpf.a\
169						$(ALU32_BUILD_DIR) \
170						$(ALU32_BUILD_DIR)/urandom_read
171	$(CC) $(TEST_PROGS_CFLAGS) $(CFLAGS) \
172		-o $(ALU32_BUILD_DIR)/test_progs_32 \
173		test_progs.c trace_helpers.c prog_tests/*.c \
174		$(OUTPUT)/libbpf.a $(LDLIBS)
175
176$(ALU32_BUILD_DIR)/test_progs_32: $(PROG_TESTS_H)
177$(ALU32_BUILD_DIR)/test_progs_32: prog_tests/*.c
178
179$(ALU32_BUILD_DIR)/%.o: progs/%.c $(ALU32_BUILD_DIR) \
180					$(ALU32_BUILD_DIR)/test_progs_32
181	$(CLANG) $(CLANG_FLAGS) \
182		 -O2 -target bpf -emit-llvm -c $< -o - |      \
183	$(LLC) -march=bpf -mattr=+alu32 -mcpu=$(CPU) $(LLC_FLAGS) \
184		-filetype=obj -o $@
185ifeq ($(DWARF2BTF),y)
186	$(BTF_PAHOLE) -J $@
187endif
188endif
189
190# Have one program compiled without "-target bpf" to test whether libbpf loads
191# it successfully
192$(OUTPUT)/test_xdp.o: progs/test_xdp.c
193	$(CLANG) $(CLANG_FLAGS) \
194		-O2 -emit-llvm -c $< -o - | \
195	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
196ifeq ($(DWARF2BTF),y)
197	$(BTF_PAHOLE) -J $@
198endif
199
200$(OUTPUT)/%.o: progs/%.c
201	$(CLANG) $(CLANG_FLAGS) \
202		 -O2 -target bpf -emit-llvm -c $< -o - |      \
203	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
204ifeq ($(DWARF2BTF),y)
205	$(BTF_PAHOLE) -J $@
206endif
207
208PROG_TESTS_H := $(OUTPUT)/prog_tests/tests.h
209$(OUTPUT)/test_progs: $(PROG_TESTS_H)
210$(OUTPUT)/test_progs: CFLAGS += $(TEST_PROGS_CFLAGS)
211$(OUTPUT)/test_progs: prog_tests/*.c
212
213PROG_TESTS_DIR = $(OUTPUT)/prog_tests
214$(PROG_TESTS_DIR):
215	mkdir -p $@
216
217PROG_TESTS_FILES := $(wildcard prog_tests/*.c)
218$(PROG_TESTS_H): $(PROG_TESTS_DIR) $(PROG_TESTS_FILES)
219	$(shell ( cd prog_tests/; \
220		  echo '/* Generated header, do not edit */'; \
221		  echo '#ifdef DECLARE'; \
222		  ls *.c 2> /dev/null | \
223			sed -e 's@\([^\.]*\)\.c@extern void test_\1(void);@'; \
224		  echo '#endif'; \
225		  echo '#ifdef CALL'; \
226		  ls *.c 2> /dev/null | \
227			sed -e 's@\([^\.]*\)\.c@test_\1();@'; \
228		  echo '#endif' \
229		 ) > $(PROG_TESTS_H))
230
231VERIFIER_TESTS_H := $(OUTPUT)/verifier/tests.h
232$(OUTPUT)/test_verifier: $(VERIFIER_TESTS_H)
233$(OUTPUT)/test_verifier: CFLAGS += $(TEST_VERIFIER_CFLAGS)
234
235VERIFIER_TESTS_DIR = $(OUTPUT)/verifier
236$(VERIFIER_TESTS_DIR):
237	mkdir -p $@
238
239VERIFIER_TEST_FILES := $(wildcard verifier/*.c)
240$(OUTPUT)/verifier/tests.h: $(VERIFIER_TESTS_DIR) $(VERIFIER_TEST_FILES)
241	$(shell ( cd verifier/; \
242		  echo '/* Generated header, do not edit */'; \
243		  echo '#ifdef FILL_ARRAY'; \
244		  ls *.c 2> /dev/null | \
245			sed -e 's@\(.*\)@#include \"\1\"@'; \
246		  echo '#endif' \
247		 ) > $(VERIFIER_TESTS_H))
248
249EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) \
250	$(VERIFIER_TESTS_H) $(PROG_TESTS_H)
251