xref: /linux/tools/bpf/bpftool/Makefile (revision 34e3ab1447db13daad066bb9fcf76cb88a827da6) 
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 nlattr.h which is not otherwise exported by libbpf, but still
35# required by bpftool.
36LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,nlattr.h)
37
38ifeq ($(BPFTOOL_VERSION),)
39BPFTOOL_VERSION := $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
40endif
41
42$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT):
43	$(QUIET_MKDIR)mkdir -p $@
44
45$(LIBBPF): FORCE | $(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)
50	$(call QUIET_INSTALL, $@)
51	$(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<
52
53$(LIBBPF_BOOTSTRAP): FORCE | $(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 \
77	-I$(srctree)/tools/perf
78CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
79ifneq ($(EXTRA_CFLAGS),)
80CFLAGS += $(EXTRA_CFLAGS)
81endif
82ifneq ($(EXTRA_LDFLAGS),)
83LDFLAGS += $(EXTRA_LDFLAGS)
84endif
85
86INSTALL ?= install
87RM ?= rm -f
88
89FEATURE_USER = .bpftool
90FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
91	clang-bpf-co-re
92FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
93	clang-bpf-co-re
94
95check_feat := 1
96NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
97ifdef MAKECMDGOALS
98ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
99  check_feat := 0
100endif
101endif
102
103ifeq ($(check_feat),1)
104ifeq ($(FEATURES_DUMP),)
105include $(srctree)/tools/build/Makefile.feature
106else
107include $(FEATURES_DUMP)
108endif
109endif
110
111ifeq ($(feature-disassembler-four-args), 1)
112CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
113endif
114
115ifeq ($(feature-reallocarray), 0)
116CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
117endif
118
119LIBS = $(LIBBPF) -lelf -lz
120LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
121ifeq ($(feature-libcap), 1)
122CFLAGS += -DUSE_LIBCAP
123LIBS += -lcap
124endif
125
126include $(wildcard $(OUTPUT)*.d)
127
128all: $(OUTPUT)bpftool
129
130BFD_SRCS = jit_disasm.c
131
132SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
133
134ifeq ($(feature-libbfd),1)
135  LIBS += -lbfd -ldl -lopcodes
136else ifeq ($(feature-libbfd-liberty),1)
137  LIBS += -lbfd -ldl -lopcodes -liberty
138else ifeq ($(feature-libbfd-liberty-z),1)
139  LIBS += -lbfd -ldl -lopcodes -liberty -lz
140endif
141
142ifneq ($(filter -lbfd,$(LIBS)),)
143CFLAGS += -DHAVE_LIBBFD_SUPPORT
144SRCS += $(BFD_SRCS)
145endif
146
147BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
148
149BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
150$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
151
152OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
153$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
154
155VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
156		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
157		     ../../../vmlinux					\
158		     /sys/kernel/btf/vmlinux				\
159		     /boot/vmlinux-$(shell uname -r)
160VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
161
162bootstrap: $(BPFTOOL_BOOTSTRAP)
163
164ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
165ifeq ($(feature-clang-bpf-co-re),1)
166
167BUILD_BPF_SKELS := 1
168
169$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
170ifeq ($(VMLINUX_H),)
171	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
172else
173	$(Q)cp "$(VMLINUX_H)" $@
174endif
175
176$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF)
177	$(QUIET_CLANG)$(CLANG) \
178		-I$(if $(OUTPUT),$(OUTPUT),.) \
179		-I$(srctree)/tools/include/uapi/ \
180		-I$(LIBBPF_INCLUDE) \
181		-g -O2 -Wall -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
182
183$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
184	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
185
186$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
187
188$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
189
190endif
191endif
192
193CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
194
195$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
196	$(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
197
198$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
199	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
200
201$(OUTPUT)feature.o: | zdep
202
203$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
204	$(QUIET_LINK)$(HOSTCC) $(CFLAGS) $(LDFLAGS) -o $@ $(BOOTSTRAP_OBJS) \
205		$(LIBS_BOOTSTRAP)
206
207$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
208	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
209
210$(BOOTSTRAP_OUTPUT)%.o: %.c | $(BOOTSTRAP_OUTPUT)
211	$(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
212
213$(OUTPUT)%.o: %.c
214	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
215
216feature-detect-clean:
217	$(call QUIET_CLEAN, feature-detect)
218	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
219
220clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
221	$(call QUIET_CLEAN, bpftool)
222	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
223	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
224	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
225	$(call QUIET_CLEAN, core-gen)
226	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
227	$(Q)$(RM) -r -- $(OUTPUT)feature/
228
229install-bin: $(OUTPUT)bpftool
230	$(call QUIET_INSTALL, bpftool)
231	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
232	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
233
234install: install-bin
235	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
236	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
237
238uninstall:
239	$(call QUIET_UNINST, bpftool)
240	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
241	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
242
243doc:
244	$(call descend,Documentation)
245
246doc-clean:
247	$(call descend,Documentation,clean)
248
249doc-install:
250	$(call descend,Documentation,install)
251
252doc-uninstall:
253	$(call descend,Documentation,uninstall)
254
255FORCE:
256
257zdep:
258	@if [ "$(feature-zlib)" != "1" ]; then echo "No zlib found"; exit 1 ; fi
259
260.SECONDARY:
261.PHONY: all FORCE clean install-bin install uninstall zdep
262.PHONY: doc doc-clean doc-install doc-uninstall
263.DEFAULT_GOAL := all
264