xref: /linux/tools/bpf/bpftool/Makefile (revision 231fc9bc27fd03db171cab4e75116923250af7a7) 
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)" $@ install_headers
51
52$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR)
53	$(call QUIET_INSTALL, $@)
54	$(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<
55
56$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
57	$(call QUIET_CLEAN, libbpf)
58	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
59
60$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
61	$(call QUIET_CLEAN, libbpf-bootstrap)
62	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
63
64prefix ?= /usr/local
65bash_compdir ?= /usr/share/bash-completion/completions
66
67CFLAGS += -O2
68CFLAGS += -W
69CFLAGS += -Wall
70CFLAGS += -Wextra
71CFLAGS += -Wformat-signedness
72CFLAGS += -Wno-unused-parameter
73CFLAGS += -Wno-missing-field-initializers
74CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
75CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
76	-I$(or $(OUTPUT),.) \
77	-I$(LIBBPF_INCLUDE) \
78	-I$(srctree)/kernel/bpf/ \
79	-I$(srctree)/tools/include \
80	-I$(srctree)/tools/include/uapi
81ifneq ($(BPFTOOL_VERSION),)
82CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
83endif
84ifneq ($(EXTRA_CFLAGS),)
85CFLAGS += $(EXTRA_CFLAGS)
86endif
87ifneq ($(EXTRA_LDFLAGS),)
88LDFLAGS += $(EXTRA_LDFLAGS)
89endif
90
91HOST_CFLAGS := $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
92		$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
93HOST_LDFLAGS := $(LDFLAGS)
94
95INSTALL ?= install
96RM ?= rm -f
97
98FEATURE_USER = .bpftool
99
100# Skip optional dependencies: LLVM (JIT disasm), libbfd (fallback
101# disasm), libcrypto (program signing).
102SKIP_LLVM ?=
103SKIP_LIBBFD ?=
104SKIP_CRYPTO ?=
105ifneq ($(SKIP_CRYPTO),1)
106  CRYPTO_LIBS := -lcrypto
107endif
108
109ifeq ($(MAKECMDGOALS),bootstrap)
110FEATURE_TESTS := libelf-zstd
111FEATURE_DISPLAY :=
112else
113FEATURE_TESTS := clang-bpf-co-re
114FEATURE_TESTS += llvm
115FEATURE_TESTS += libcap
116FEATURE_TESTS += libbfd
117FEATURE_TESTS += libbfd-liberty
118FEATURE_TESTS += libbfd-liberty-z
119FEATURE_TESTS += disassembler-four-args
120FEATURE_TESTS += disassembler-init-styled
121FEATURE_TESTS += libelf-zstd
122
123FEATURE_DISPLAY := clang-bpf-co-re
124FEATURE_DISPLAY += llvm
125FEATURE_DISPLAY += libcap
126FEATURE_DISPLAY += libbfd
127FEATURE_DISPLAY += libbfd-liberty
128FEATURE_DISPLAY += libbfd-liberty-z
129endif
130
131check_feat := 1
132NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
133ifdef MAKECMDGOALS
134ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
135  check_feat := 0
136endif
137endif
138
139ifeq ($(check_feat),1)
140ifeq ($(FEATURES_DUMP),)
141include $(srctree)/tools/build/Makefile.feature
142else
143include $(FEATURES_DUMP)
144endif
145endif
146
147LIBS = $(LIBBPF) -lelf $(CRYPTO_LIBS) -lz
148LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf $(CRYPTO_LIBS) -lz
149
150ifeq ($(feature-libelf-zstd),1)
151LIBS += -lzstd
152LIBS_BOOTSTRAP += -lzstd
153endif
154
155ifeq ($(feature-libcap), 1)
156CFLAGS += -DUSE_LIBCAP
157LIBS += -lcap
158endif
159
160include $(wildcard $(OUTPUT)*.d)
161
162all: $(OUTPUT)bpftool
163
164SRCS := $(wildcard *.c)
165
166ifeq ($(feature-llvm),1)
167ifneq ($(SKIP_LLVM),1)
168HAS_LLVM := 1
169endif
170endif
171
172ifeq ($(HAS_LLVM),1)
173  CFLAGS  += -DHAVE_LLVM_SUPPORT
174  LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets
175  # llvm-config always adds -D_GNU_SOURCE, however, it may already be in CFLAGS
176  # (e.g. when bpftool build is called from selftests build as selftests
177  # Makefile includes lib.mk which sets -D_GNU_SOURCE) which would cause
178  # compilation error due to redefinition. Let's filter it out here.
179  CFLAGS  += $(filter-out -D_GNU_SOURCE,$(shell $(LLVM_CONFIG) --cflags))
180  LIBS    += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS))
181  ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static)
182    LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS))
183    LIBS += -lstdc++
184  endif
185  LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags)
186else
187  ifneq ($(SKIP_LIBBFD),1)
188  # Fall back on libbfd
189  ifeq ($(feature-libbfd),1)
190    LIBS += -lbfd -ldl -lopcodes
191  else ifeq ($(feature-libbfd-liberty),1)
192    LIBS += -lbfd -ldl -lopcodes -liberty
193  else ifeq ($(feature-libbfd-liberty-z),1)
194    LIBS += -lbfd -ldl -lopcodes -liberty -lz
195  endif
196
197  # If one of the above feature combinations is set, we support libbfd
198  ifneq ($(filter -lbfd,$(LIBS)),)
199    CFLAGS += -DHAVE_LIBBFD_SUPPORT
200
201    # Libbfd interface changed over time, figure out what we need
202    ifeq ($(feature-disassembler-four-args), 1)
203      CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
204    endif
205    ifeq ($(feature-disassembler-init-styled), 1)
206      CFLAGS += -DDISASM_INIT_STYLED
207    endif
208  endif
209  endif # SKIP_LIBBFD
210endif
211ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)
212  # No support for JIT disassembly
213  SRCS := $(filter-out jit_disasm.c,$(SRCS))
214endif
215
216ifeq ($(SKIP_CRYPTO),1)
217  CFLAGS += -DBPFTOOL_WITHOUT_CRYPTO
218  HOST_CFLAGS += -DBPFTOOL_WITHOUT_CRYPTO
219  SRCS := $(filter-out sign.c,$(SRCS))
220endif
221
222BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
223
224BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o $(if $(CRYPTO_LIBS),sign.o))
225$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
226
227OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
228$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
229
230VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
231		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
232		     ../../../vmlinux					\
233		     /sys/kernel/btf/vmlinux				\
234		     /boot/vmlinux-$(shell uname -r)
235VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
236
237bootstrap: $(BPFTOOL_BOOTSTRAP)
238
239ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
240ifeq ($(feature-clang-bpf-co-re),1)
241
242BUILD_BPF_SKELS := 1
243
244ifeq ($(VMLINUX_H),)
245$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
246	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
247else
248$(OUTPUT)vmlinux.h: $(VMLINUX_H)
249	$(Q)cp "$(VMLINUX_H)" $@
250endif
251
252$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
253	$(QUIET_CLANG)$(CLANG) \
254		-Wno-microsoft-anon-tag \
255		-fms-extensions \
256		-I$(or $(OUTPUT),.) \
257		-I$(srctree)/tools/include/uapi/ \
258		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
259		-g -O2 -Wall -fno-stack-protector \
260		--target=bpf -c $< -o $@
261	$(Q)$(LLVM_STRIP) -g $@
262
263$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
264	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
265
266$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
267
268$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
269
270endif
271endif
272
273CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
274
275$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
276	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
277
278$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
279	$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
280
281$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
282	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
283
284$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
285	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
286
287$(OUTPUT)%.o: %.c
288	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
289
290feature-detect-clean:
291	$(call QUIET_CLEAN, feature-detect)
292	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
293
294clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
295	$(call QUIET_CLEAN, bpftool)
296	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
297	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
298	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
299	$(call QUIET_CLEAN, core-gen)
300	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
301	$(Q)$(RM) -r -- $(OUTPUT)feature/
302
303install-bin: $(OUTPUT)bpftool
304	$(call QUIET_INSTALL, bpftool)
305	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
306	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
307
308install: install-bin
309	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
310	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
311
312uninstall:
313	$(call QUIET_UNINST, bpftool)
314	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
315	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
316
317doc:
318	$(call descend,Documentation)
319
320doc-clean:
321	$(call descend,Documentation,clean)
322
323doc-install:
324	$(call descend,Documentation,install)
325
326doc-uninstall:
327	$(call descend,Documentation,uninstall)
328
329FORCE:
330
331.SECONDARY:
332.PHONY: all FORCE bootstrap clean install-bin install uninstall
333.PHONY: doc doc-clean doc-install doc-uninstall
334.DEFAULT_GOAL := all
335
336# Delete partially updated (corrupted) files on error
337.DELETE_ON_ERROR:
338