xref: /linux/tools/bpf/bpftool/Makefile (revision 8f184732b60b74a8f8ba0d9a5c248bf611b1ebba) 
1# SPDX-License-Identifier: GPL-2.0-only
2include ../../scripts/Makefile.include
3include ../../scripts/utilities.mak
4
5ifeq ($(srctree),)
6srctree := $(patsubst %/,%,$(dir $(CURDIR)))
7srctree := $(patsubst %/,%,$(dir $(srctree)))
8srctree := $(patsubst %/,%,$(dir $(srctree)))
9endif
10
11ifeq ($(V),1)
12  Q =
13else
14  Q = @
15endif
16
17BPF_DIR = $(srctree)/tools/lib/bpf
18
19ifneq ($(OUTPUT),)
20  _OUTPUT := $(OUTPUT)
21else
22  _OUTPUT := $(CURDIR)
23endif
24BOOTSTRAP_OUTPUT := $(_OUTPUT)/bootstrap/
25LIBBPF_OUTPUT := $(_OUTPUT)/libbpf/
26LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
27LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include
28LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
29
30LIBBPF = $(LIBBPF_OUTPUT)libbpf.a
31LIBBPF_BOOTSTRAP_OUTPUT = $(BOOTSTRAP_OUTPUT)libbpf/
32LIBBPF_BOOTSTRAP = $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
33
34# We need to copy hashmap.h and nlattr.h which is not otherwise exported by
35# libbpf, but still required by bpftool.
36LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h)
37
38ifeq ($(BPFTOOL_VERSION),)
39BPFTOOL_VERSION := $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
40endif
41
42$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR):
43	$(QUIET_MKDIR)mkdir -p $@
44
45$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT)
46	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) \
47		DESTDIR=$(LIBBPF_DESTDIR) prefix= $(LIBBPF) install_headers
48
49$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR)
50	$(call QUIET_INSTALL, $@)
51	$(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<
52
53$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT)
54	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \
55		ARCH= CC=$(HOSTCC) LD=$(HOSTLD) $@
56
57$(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 -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
70CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
71CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
72	-I$(if $(OUTPUT),$(OUTPUT),.) \
73	-I$(LIBBPF_INCLUDE) \
74	-I$(srctree)/kernel/bpf/ \
75	-I$(srctree)/tools/include \
76	-I$(srctree)/tools/include/uapi
77CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
78ifneq ($(EXTRA_CFLAGS),)
79CFLAGS += $(EXTRA_CFLAGS)
80endif
81ifneq ($(EXTRA_LDFLAGS),)
82LDFLAGS += $(EXTRA_LDFLAGS)
83endif
84
85INSTALL ?= install
86RM ?= rm -f
87
88FEATURE_USER = .bpftool
89FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
90	clang-bpf-co-re
91FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
92	clang-bpf-co-re
93
94check_feat := 1
95NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
96ifdef MAKECMDGOALS
97ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
98  check_feat := 0
99endif
100endif
101
102ifeq ($(check_feat),1)
103ifeq ($(FEATURES_DUMP),)
104include $(srctree)/tools/build/Makefile.feature
105else
106include $(FEATURES_DUMP)
107endif
108endif
109
110ifeq ($(feature-disassembler-four-args), 1)
111CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
112endif
113
114ifeq ($(feature-reallocarray), 0)
115CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
116endif
117
118LIBS = $(LIBBPF) -lelf -lz
119LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
120ifeq ($(feature-libcap), 1)
121CFLAGS += -DUSE_LIBCAP
122LIBS += -lcap
123endif
124
125include $(wildcard $(OUTPUT)*.d)
126
127all: $(OUTPUT)bpftool
128
129BFD_SRCS = jit_disasm.c
130
131SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
132
133ifeq ($(feature-libbfd),1)
134  LIBS += -lbfd -ldl -lopcodes
135else ifeq ($(feature-libbfd-liberty),1)
136  LIBS += -lbfd -ldl -lopcodes -liberty
137else ifeq ($(feature-libbfd-liberty-z),1)
138  LIBS += -lbfd -ldl -lopcodes -liberty -lz
139endif
140
141ifneq ($(filter -lbfd,$(LIBS)),)
142CFLAGS += -DHAVE_LIBBFD_SUPPORT
143SRCS += $(BFD_SRCS)
144endif
145
146BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
147
148BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
149$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
150
151OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
152$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
153
154VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
155		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
156		     ../../../vmlinux					\
157		     /sys/kernel/btf/vmlinux				\
158		     /boot/vmlinux-$(shell uname -r)
159VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
160
161bootstrap: $(BPFTOOL_BOOTSTRAP)
162
163ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
164ifeq ($(feature-clang-bpf-co-re),1)
165
166BUILD_BPF_SKELS := 1
167
168$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
169ifeq ($(VMLINUX_H),)
170	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
171else
172	$(Q)cp "$(VMLINUX_H)" $@
173endif
174
175$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF)
176	$(QUIET_CLANG)$(CLANG) \
177		-I$(if $(OUTPUT),$(OUTPUT),.) \
178		-I$(srctree)/tools/include/uapi/ \
179		-I$(LIBBPF_INCLUDE) \
180		-g -O2 -Wall -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
181
182$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
183	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
184
185$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
186
187$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
188
189endif
190endif
191
192CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
193
194$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
195	$(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
196
197$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
198	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
199
200$(OUTPUT)feature.o:
201ifneq ($(feature-zlib), 1)
202	$(error "No zlib found")
203endif
204
205$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
206	$(QUIET_LINK)$(HOSTCC) $(CFLAGS) $(LDFLAGS) -o $@ $(BOOTSTRAP_OBJS) \
207		$(LIBS_BOOTSTRAP)
208
209$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
210	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
211
212$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
213	$(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
214
215$(OUTPUT)%.o: %.c
216	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
217
218feature-detect-clean:
219	$(call QUIET_CLEAN, feature-detect)
220	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
221
222clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
223	$(call QUIET_CLEAN, bpftool)
224	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
225	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
226	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
227	$(call QUIET_CLEAN, core-gen)
228	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
229	$(Q)$(RM) -r -- $(OUTPUT)feature/
230
231install-bin: $(OUTPUT)bpftool
232	$(call QUIET_INSTALL, bpftool)
233	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
234	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
235
236install: install-bin
237	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
238	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
239
240uninstall:
241	$(call QUIET_UNINST, bpftool)
242	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
243	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
244
245doc:
246	$(call descend,Documentation)
247
248doc-clean:
249	$(call descend,Documentation,clean)
250
251doc-install:
252	$(call descend,Documentation,install)
253
254doc-uninstall:
255	$(call descend,Documentation,uninstall)
256
257FORCE:
258
259.SECONDARY:
260.PHONY: all FORCE clean install-bin install uninstall
261.PHONY: doc doc-clean doc-install doc-uninstall
262.DEFAULT_GOAL := all
263