xref: /linux/tools/bpf/bpftool/Makefile (revision c73a24436698ade1b6a0742e8bcfa04c9ef8fad9) 
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
109FEATURE_TESTS := clang-bpf-co-re
110FEATURE_TESTS += llvm
111FEATURE_TESTS += libcap
112FEATURE_TESTS += libbfd
113FEATURE_TESTS += libbfd-liberty
114FEATURE_TESTS += libbfd-liberty-z
115FEATURE_TESTS += disassembler-four-args
116FEATURE_TESTS += disassembler-init-styled
117FEATURE_TESTS += libelf-zstd
118
119FEATURE_DISPLAY := clang-bpf-co-re
120FEATURE_DISPLAY += llvm
121FEATURE_DISPLAY += libcap
122FEATURE_DISPLAY += libbfd
123FEATURE_DISPLAY += libbfd-liberty
124FEATURE_DISPLAY += libbfd-liberty-z
125
126check_feat := 1
127NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
128ifdef MAKECMDGOALS
129ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
130  check_feat := 0
131endif
132endif
133
134ifeq ($(check_feat),1)
135ifeq ($(FEATURES_DUMP),)
136include $(srctree)/tools/build/Makefile.feature
137else
138include $(FEATURES_DUMP)
139endif
140endif
141
142LIBS = $(LIBBPF) -lelf $(CRYPTO_LIBS) -lz
143LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf $(CRYPTO_LIBS) -lz
144
145ifeq ($(feature-libelf-zstd),1)
146LIBS += -lzstd
147LIBS_BOOTSTRAP += -lzstd
148endif
149
150ifeq ($(feature-libcap), 1)
151CFLAGS += -DUSE_LIBCAP
152LIBS += -lcap
153endif
154
155include $(wildcard $(OUTPUT)*.d)
156
157all: $(OUTPUT)bpftool
158
159SRCS := $(wildcard *.c)
160
161ifeq ($(feature-llvm),1)
162ifneq ($(SKIP_LLVM),1)
163HAS_LLVM := 1
164endif
165endif
166
167ifeq ($(HAS_LLVM),1)
168  CFLAGS  += -DHAVE_LLVM_SUPPORT
169  LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets
170  # llvm-config always adds -D_GNU_SOURCE, however, it may already be in CFLAGS
171  # (e.g. when bpftool build is called from selftests build as selftests
172  # Makefile includes lib.mk which sets -D_GNU_SOURCE) which would cause
173  # compilation error due to redefinition. Let's filter it out here.
174  CFLAGS  += $(filter-out -D_GNU_SOURCE,$(shell $(LLVM_CONFIG) --cflags))
175  LIBS    += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS))
176  ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static)
177    LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS))
178    LIBS += -lstdc++
179  endif
180  LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags)
181else
182  ifneq ($(SKIP_LIBBFD),1)
183  # Fall back on libbfd
184  ifeq ($(feature-libbfd),1)
185    LIBS += -lbfd -ldl -lopcodes
186  else ifeq ($(feature-libbfd-liberty),1)
187    LIBS += -lbfd -ldl -lopcodes -liberty
188  else ifeq ($(feature-libbfd-liberty-z),1)
189    LIBS += -lbfd -ldl -lopcodes -liberty -lz
190  endif
191
192  # If one of the above feature combinations is set, we support libbfd
193  ifneq ($(filter -lbfd,$(LIBS)),)
194    CFLAGS += -DHAVE_LIBBFD_SUPPORT
195
196    # Libbfd interface changed over time, figure out what we need
197    ifeq ($(feature-disassembler-four-args), 1)
198      CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
199    endif
200    ifeq ($(feature-disassembler-init-styled), 1)
201      CFLAGS += -DDISASM_INIT_STYLED
202    endif
203  endif
204  endif # SKIP_LIBBFD
205endif
206ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)
207  # No support for JIT disassembly
208  SRCS := $(filter-out jit_disasm.c,$(SRCS))
209endif
210
211ifeq ($(SKIP_CRYPTO),1)
212  CFLAGS += -DBPFTOOL_WITHOUT_CRYPTO
213  HOST_CFLAGS += -DBPFTOOL_WITHOUT_CRYPTO
214  SRCS := $(filter-out sign.c,$(SRCS))
215endif
216
217BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
218
219BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o $(if $(CRYPTO_LIBS),sign.o))
220$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
221
222OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
223$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
224
225VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
226		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
227		     ../../../vmlinux					\
228		     /sys/kernel/btf/vmlinux				\
229		     /boot/vmlinux-$(shell uname -r)
230VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
231
232bootstrap: $(BPFTOOL_BOOTSTRAP)
233
234ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
235ifeq ($(feature-clang-bpf-co-re),1)
236
237BUILD_BPF_SKELS := 1
238
239ifeq ($(VMLINUX_H),)
240$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
241	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
242else
243$(OUTPUT)vmlinux.h: $(VMLINUX_H)
244	$(Q)cp "$(VMLINUX_H)" $@
245endif
246
247$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
248	$(QUIET_CLANG)$(CLANG) \
249		-Wno-microsoft-anon-tag \
250		-fms-extensions \
251		-I$(or $(OUTPUT),.) \
252		-I$(srctree)/tools/include/uapi/ \
253		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
254		-g -O2 -Wall -fno-stack-protector \
255		--target=bpf -c $< -o $@
256	$(Q)$(LLVM_STRIP) -g $@
257
258$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
259	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
260
261$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
262
263$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
264
265endif
266endif
267
268CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
269
270$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
271	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
272
273$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
274	$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
275
276$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
277	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
278
279$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
280	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
281
282$(OUTPUT)%.o: %.c
283	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
284
285feature-detect-clean:
286	$(call QUIET_CLEAN, feature-detect)
287	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
288
289clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
290	$(call QUIET_CLEAN, bpftool)
291	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
292	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
293	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
294	$(call QUIET_CLEAN, core-gen)
295	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
296	$(Q)$(RM) -r -- $(OUTPUT)feature/
297
298install-bin: $(OUTPUT)bpftool
299	$(call QUIET_INSTALL, bpftool)
300	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
301	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
302
303install: install-bin
304	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
305	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
306
307uninstall:
308	$(call QUIET_UNINST, bpftool)
309	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
310	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
311
312doc:
313	$(call descend,Documentation)
314
315doc-clean:
316	$(call descend,Documentation,clean)
317
318doc-install:
319	$(call descend,Documentation,install)
320
321doc-uninstall:
322	$(call descend,Documentation,uninstall)
323
324FORCE:
325
326.SECONDARY:
327.PHONY: all FORCE bootstrap clean install-bin install uninstall
328.PHONY: doc doc-clean doc-install doc-uninstall
329.DEFAULT_GOAL := all
330
331# Delete partially updated (corrupted) files on error
332.DELETE_ON_ERROR:
333