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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2include Makefile.include
3
4ifeq ($(srctree),)
5srctree := $(patsubst %/,%,$(dir $(CURDIR)))
6endif
7
8ifeq ($(V),1)
9  Q =
10else
11  Q = @
12endif
13
14BPF_DIR = $(srctree)/libbpf/src
15
16ifneq ($(OUTPUT),)
17  _OUTPUT := $(OUTPUT)
18else
19  _OUTPUT := $(CURDIR)
20endif
21BOOTSTRAP_OUTPUT := $(_OUTPUT)/bootstrap/
22
23LIBBPF_OUTPUT := $(_OUTPUT)/libbpf/
24LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
25LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include
26LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
27LIBBPF := $(LIBBPF_OUTPUT)libbpf.a
28
29LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/
30LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT)
31LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)/include
32LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf
33LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
34
35# We need to copy hashmap.h and nlattr.h which is not otherwise exported by
36# libbpf, but still required by bpftool.
37LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h)
38LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h)
39
40ifeq ($(BPFTOOL_VERSION),)
41BPFTOOL_VERSION := 5.16.0+dc37dc617fab
42endif
43
44$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_HDRS_DIR):
45	$(QUIET_MKDIR)mkdir -p $@
46
47$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT)
48	$(Q)$(MAKE) -C $(BPF_DIR) OBJDIR=$(patsubst %/,%,$(LIBBPF_OUTPUT)) \
49		PREFIX=$(LIBBPF_DESTDIR) $(LIBBPF) install_headers
50
51$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR)
52	$(call QUIET_INSTALL, $@)
53	$(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<
54
55$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT)
56	$(Q)$(MAKE) -C $(BPF_DIR) OBJDIR=$(patsubst %/,%,$(LIBBPF_BOOTSTRAP_OUTPUT)) \
57		PREFIX=$(LIBBPF_BOOTSTRAP_DESTDIR) \
58		ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) $@ install_headers
59
60$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR)
61	$(call QUIET_INSTALL, $@)
62	$(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<
63
64$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
65	$(call QUIET_CLEAN, libbpf)
66	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
67
68$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
69	$(call QUIET_CLEAN, libbpf-bootstrap)
70	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
71
72prefix ?= /usr/local
73bash_compdir ?= /usr/share/bash-completion/completions
74
75CFLAGS += -O2
76CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
77CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
78CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
79	-I$(if $(OUTPUT),$(OUTPUT),.) \
80	-I$(LIBBPF_INCLUDE) \
81	-I$(srctree)/src/kernel/bpf/ \
82	-I$(srctree)/include \
83	-I$(srctree)/include/uapi
84CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
85ifneq ($(EXTRA_CFLAGS),)
86CFLAGS += $(EXTRA_CFLAGS)
87endif
88ifneq ($(EXTRA_LDFLAGS),)
89LDFLAGS += $(EXTRA_LDFLAGS)
90endif
91
92INSTALL ?= install
93RM ?= rm -f
94
95FEATURE_USER = .bpftool
96FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
97	clang-bpf-co-re
98FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
99	clang-bpf-co-re
100
101check_feat := 1
102NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
103ifdef MAKECMDGOALS
104ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
105  check_feat := 0
106endif
107endif
108
109ifeq ($(check_feat),1)
110include Makefile.feature
111endif
112
113ifeq ($(feature-disassembler-four-args), 1)
114CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
115endif
116
117ifeq ($(feature-reallocarray), 0)
118CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
119endif
120
121LIBS = $(LIBBPF) -lelf -lz
122LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
123ifeq ($(feature-libcap), 1)
124CFLAGS += -DUSE_LIBCAP
125LIBS += -lcap
126endif
127
128include $(wildcard $(OUTPUT)*.d)
129
130all: $(OUTPUT)bpftool
131
132BFD_SRCS = jit_disasm.c
133
134SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
135
136ifeq ($(feature-libbfd),1)
137  LIBS += -lbfd -ldl -lopcodes
138else ifeq ($(feature-libbfd-liberty),1)
139  LIBS += -lbfd -ldl -lopcodes -liberty
140else ifeq ($(feature-libbfd-liberty-z),1)
141  LIBS += -lbfd -ldl -lopcodes -liberty -lz
142endif
143
144ifneq ($(filter -lbfd,$(LIBS)),)
145CFLAGS += -DHAVE_LIBBFD_SUPPORT
146SRCS += $(BFD_SRCS)
147endif
148
149HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
150		$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
151
152BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
153
154BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
155$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
156
157OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
158$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
159
160VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
161		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
162		     ../../../vmlinux					\
163		     /sys/kernel/btf/vmlinux				\
164		     /boot/vmlinux-$(shell uname -r)
165VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
166
167bootstrap: $(BPFTOOL_BOOTSTRAP)
168
169ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
170ifeq ($(feature-clang-bpf-co-re),1)
171
172BUILD_BPF_SKELS := 1
173
174$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
175ifeq ($(VMLINUX_H),)
176	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
177else
178	$(Q)cp "$(VMLINUX_H)" $@
179endif
180
181$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
182	$(QUIET_CLANG)$(CLANG) \
183		-I$(if $(OUTPUT),$(OUTPUT),.) \
184		-I$(srctree)/include/uapi/ \
185		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
186		-g -O2 -Wall -target bpf -c $< -o $@
187	$(Q)$(LLVM_STRIP) -g $@
188
189$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
190	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
191
192$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
193
194$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
195
196endif
197endif
198
199CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
200
201$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/src/kernel/bpf/disasm.c
202	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
203
204$(OUTPUT)disasm.o: $(srctree)/src/kernel/bpf/disasm.c
205	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
206
207$(OUTPUT)feature.o:
208ifneq ($(feature-zlib), 1)
209	$(error "No zlib found")
210endif
211
212$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
213	$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
214
215$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
216	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
217
218$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
219	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
220
221$(OUTPUT)%.o: %.c
222	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
223
224feature-detect-clean:
225	$(call QUIET_CLEAN, feature-detect)
226	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
227
228clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean
229	$(call QUIET_CLEAN, bpftool)
230	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
231	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
232	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
233	$(call QUIET_CLEAN, core-gen)
234	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
235	$(Q)$(RM) -r -- $(OUTPUT)feature/
236
237install-bin: $(OUTPUT)bpftool
238	$(call QUIET_INSTALL, bpftool)
239	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
240	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
241
242install: install-bin
243	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
244	$(Q)$(INSTALL) -m 0644 $(srctree)/bash-completion/bpftool $(DESTDIR)$(bash_compdir)
245
246uninstall:
247	$(call QUIET_UNINST, bpftool)
248	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
249	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
250
251doc:
252	$(call descend,$(srctree)/docs)
253
254doc-clean:
255	$(call descend,$(srctree)/docs,clean)
256
257doc-install:
258	$(call descend,$(srctree)/docs,install)
259
260doc-uninstall:
261	$(call descend,$(srctree)/docs,uninstall)
262
263FORCE:
264
265.SECONDARY:
266.PHONY: all FORCE bootstrap clean install-bin install uninstall
267.PHONY: doc doc-clean doc-install doc-uninstall
268.DEFAULT_GOAL := all
269