xref: /linux/tools/bpf/bpftool/Makefile (revision 9080b97689dbf8d2c338a9af97cd2b4a714f25bf) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2include ../../scripts/Makefile.include
3
4ifeq ($(srctree),)
5srctree := $(patsubst %/,%,$(dir $(CURDIR)))
6srctree := $(patsubst %/,%,$(dir $(srctree)))
7srctree := $(patsubst %/,%,$(dir $(srctree)))
8endif
9
10BPF_DIR = $(srctree)/tools/lib/bpf
11
12ifneq ($(OUTPUT),)
13  _OUTPUT := $(OUTPUT)
14else
15  _OUTPUT := $(CURDIR)/
16endif
17BOOTSTRAP_OUTPUT := $(_OUTPUT)bootstrap/
18
19LIBBPF_OUTPUT := $(_OUTPUT)libbpf/
20LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
21LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
22LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
23LIBBPF := $(LIBBPF_OUTPUT)libbpf.a
24
25LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/
26LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT)
27LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)include
28LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf
29LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
30
31# We need to copy hashmap.h, nlattr.h, relo_core.h and libbpf_internal.h
32# which are not otherwise exported by libbpf, but still required by bpftool.
33LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h relo_core.h libbpf_internal.h)
34LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h relo_core.h libbpf_internal.h)
35
36$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_HDRS_DIR):
37	$(QUIET_MKDIR)mkdir -p $@
38
39$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT)
40	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) \
41		DESTDIR=$(LIBBPF_DESTDIR:/=) prefix= $(LIBBPF) install_headers
42
43$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR)
44	$(call QUIET_INSTALL, $@)
45	$(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<
46
47$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT)
48	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \
49		DESTDIR=$(LIBBPF_BOOTSTRAP_DESTDIR:/=) prefix= \
50		ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" \
51		CFLAGS="$(LIBBPF_BOOTSTRAP_CFLAGS)" EXTRA_CFLAGS= $@ install_headers
52
53$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR)
54	$(call QUIET_INSTALL, $@)
55	$(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<
56
57$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
58	$(call QUIET_CLEAN, libbpf)
59	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
60
61$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
62	$(call QUIET_CLEAN, libbpf-bootstrap)
63	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
64
65prefix ?= /usr/local
66bash_compdir ?= /usr/share/bash-completion/completions
67
68CFLAGS += -O2
69CFLAGS += -W
70CFLAGS += -Wall
71CFLAGS += -Wextra
72CFLAGS += -Wformat-signedness
73CFLAGS += -Wno-unused-parameter
74CFLAGS += -Wno-missing-field-initializers
75CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
76CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
77	-I$(or $(OUTPUT),.) \
78	-I$(LIBBPF_INCLUDE) \
79	-I$(srctree)/kernel/bpf/ \
80	-I$(srctree)/tools/include \
81	-I$(srctree)/tools/include/uapi
82ifneq ($(BPFTOOL_VERSION),)
83CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
84endif
85ifneq ($(EXTRA_CFLAGS),)
86CFLAGS += $(EXTRA_CFLAGS)
87endif
88ifneq ($(EXTRA_LDFLAGS),)
89LDFLAGS += $(EXTRA_LDFLAGS)
90endif
91
92HOST_CFLAGS := $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
93		$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
94HOST_LDFLAGS := $(LDFLAGS)
95
96# Remove warnings for libbpf bootstrap build
97LIBBPF_BOOTSTRAP_CFLAGS := $(filter-out -W -Wall -Wextra -Wformat -Wformat-signedness,$(HOST_CFLAGS))
98
99INSTALL ?= install
100RM ?= rm -f
101
102FEATURE_USER = .bpftool
103
104# Skip optional dependencies: LLVM (JIT disasm), libbfd (fallback
105# disasm), libcrypto (program signing).
106SKIP_LLVM ?=
107SKIP_LIBBFD ?=
108SKIP_CRYPTO ?=
109ifneq ($(SKIP_CRYPTO),1)
110  CRYPTO_LIBS := -lcrypto
111endif
112
113ifeq ($(MAKECMDGOALS),bootstrap)
114FEATURE_TESTS := libelf-zstd
115FEATURE_DISPLAY :=
116else
117FEATURE_TESTS := clang-bpf-co-re
118FEATURE_TESTS += llvm
119FEATURE_TESTS += libcap
120FEATURE_TESTS += libbfd
121FEATURE_TESTS += libbfd-liberty
122FEATURE_TESTS += libbfd-liberty-z
123FEATURE_TESTS += disassembler-four-args
124FEATURE_TESTS += disassembler-init-styled
125FEATURE_TESTS += libelf-zstd
126
127FEATURE_DISPLAY := clang-bpf-co-re
128FEATURE_DISPLAY += llvm
129FEATURE_DISPLAY += libcap
130FEATURE_DISPLAY += libbfd
131FEATURE_DISPLAY += libbfd-liberty
132FEATURE_DISPLAY += libbfd-liberty-z
133endif
134
135check_feat := 1
136NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
137ifdef MAKECMDGOALS
138ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
139  check_feat := 0
140endif
141endif
142
143ifeq ($(check_feat),1)
144ifeq ($(FEATURES_DUMP),)
145include $(srctree)/tools/build/Makefile.feature
146else
147include $(FEATURES_DUMP)
148endif
149endif
150
151LIBS = $(LIBBPF) -lelf $(CRYPTO_LIBS) -lz
152LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf $(CRYPTO_LIBS) -lz
153
154ifeq ($(feature-libelf-zstd),1)
155LIBS += -lzstd
156LIBS_BOOTSTRAP += -lzstd
157endif
158
159ifeq ($(feature-libcap), 1)
160CFLAGS += -DUSE_LIBCAP
161LIBS += -lcap
162endif
163
164include $(wildcard $(OUTPUT)*.d)
165
166all: $(OUTPUT)bpftool
167
168SRCS := $(wildcard *.c)
169
170ifeq ($(feature-llvm),1)
171ifneq ($(SKIP_LLVM),1)
172HAS_LLVM := 1
173endif
174endif
175
176ifeq ($(HAS_LLVM),1)
177  CFLAGS  += -DHAVE_LLVM_SUPPORT
178  LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets
179  # llvm-config always adds -D_GNU_SOURCE, however, it may already be in CFLAGS
180  # (e.g. when bpftool build is called from selftests build as selftests
181  # Makefile includes lib.mk which sets -D_GNU_SOURCE) which would cause
182  # compilation error due to redefinition. Let's filter it out here.
183  CFLAGS  += $(filter-out -D_GNU_SOURCE,$(shell $(LLVM_CONFIG) --cflags))
184  LIBS    += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS))
185  ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static)
186    LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS))
187    LIBS += -lstdc++
188  endif
189  LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags)
190else
191  ifneq ($(SKIP_LIBBFD),1)
192  # Fall back on libbfd
193  ifeq ($(feature-libbfd),1)
194    LIBS += -lbfd -ldl -lopcodes
195  else ifeq ($(feature-libbfd-liberty),1)
196    LIBS += -lbfd -ldl -lopcodes -liberty
197  else ifeq ($(feature-libbfd-liberty-z),1)
198    LIBS += -lbfd -ldl -lopcodes -liberty -lz
199  endif
200
201  # If one of the above feature combinations is set, we support libbfd
202  ifneq ($(filter -lbfd,$(LIBS)),)
203    CFLAGS += -DHAVE_LIBBFD_SUPPORT
204
205    # Libbfd interface changed over time, figure out what we need
206    ifeq ($(feature-disassembler-four-args), 1)
207      CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
208    endif
209    ifeq ($(feature-disassembler-init-styled), 1)
210      CFLAGS += -DDISASM_INIT_STYLED
211    endif
212  endif
213  endif # SKIP_LIBBFD
214endif
215ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)
216  # No support for JIT disassembly
217  SRCS := $(filter-out jit_disasm.c,$(SRCS))
218endif
219
220ifeq ($(SKIP_CRYPTO),1)
221  CFLAGS += -DBPFTOOL_WITHOUT_CRYPTO
222  HOST_CFLAGS += -DBPFTOOL_WITHOUT_CRYPTO
223  SRCS := $(filter-out sign.c,$(SRCS))
224endif
225
226BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
227
228BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o $(if $(CRYPTO_LIBS),sign.o))
229$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
230
231OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
232$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
233
234VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
235		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
236		     ../../../vmlinux					\
237		     /sys/kernel/btf/vmlinux				\
238		     /boot/vmlinux-$(shell uname -r)
239VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
240
241bootstrap: $(BPFTOOL_BOOTSTRAP)
242
243ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
244ifeq ($(feature-clang-bpf-co-re),1)
245
246BUILD_BPF_SKELS := 1
247
248ifeq ($(VMLINUX_H),)
249$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
250	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
251else
252$(OUTPUT)vmlinux.h: $(VMLINUX_H)
253	$(Q)cp "$(VMLINUX_H)" $@
254endif
255
256$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
257	$(QUIET_CLANG)$(CLANG) \
258		-Wno-microsoft-anon-tag \
259		-fms-extensions \
260		-I$(or $(OUTPUT),.) \
261		-I$(srctree)/tools/include/uapi/ \
262		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
263		-g -O2 -Wall -fno-stack-protector \
264		--target=bpf -c $< -o $@
265	$(Q)$(LLVM_STRIP) -g $@
266
267$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
268	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
269
270$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
271
272$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
273
274endif
275endif
276
277CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
278
279$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
280	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
281
282$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
283	$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
284
285$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
286	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
287
288$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
289	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
290
291$(OUTPUT)%.o: %.c
292	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
293
294feature-detect-clean:
295	$(call QUIET_CLEAN, feature-detect)
296	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
297
298clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
299	$(call QUIET_CLEAN, bpftool)
300	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
301	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
302	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
303	$(call QUIET_CLEAN, core-gen)
304	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
305	$(Q)$(RM) -r -- $(OUTPUT)feature/
306
307install-bin: $(OUTPUT)bpftool
308	$(call QUIET_INSTALL, bpftool)
309	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
310	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
311
312install: install-bin
313	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
314	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
315
316uninstall:
317	$(call QUIET_UNINST, bpftool)
318	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
319	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
320
321doc:
322	$(call descend,Documentation)
323
324doc-clean:
325	$(call descend,Documentation,clean)
326
327doc-install:
328	$(call descend,Documentation,install)
329
330doc-uninstall:
331	$(call descend,Documentation,uninstall)
332
333FORCE:
334
335.SECONDARY:
336.PHONY: all FORCE bootstrap clean install-bin install uninstall
337.PHONY: doc doc-clean doc-install doc-uninstall
338.DEFAULT_GOAL := all
339
340# Delete partially updated (corrupted) files on error
341.DELETE_ON_ERROR:
342