xref: /openbmc/linux/tools/bpf/bpftool/Makefile (revision faf69551) 
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/
25
26LIBBPF_OUTPUT := $(_OUTPUT)/libbpf/
27LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
28LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include
29LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
30LIBBPF := $(LIBBPF_OUTPUT)libbpf.a
31
32LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/
33LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT)
34LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)/include
35LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf
36LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
37
38# We need to copy hashmap.h and nlattr.h which is not otherwise exported by
39# libbpf, but still required by bpftool.
40LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h)
41LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h)
42
43ifeq ($(BPFTOOL_VERSION),)
44BPFTOOL_VERSION := $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
45endif
46
47$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_HDRS_DIR):
48	$(QUIET_MKDIR)mkdir -p $@
49
50$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT)
51	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) \
52		DESTDIR=$(LIBBPF_DESTDIR) prefix= $(LIBBPF) install_headers
53
54$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR)
55	$(call QUIET_INSTALL, $@)
56	$(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<
57
58$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT)
59	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \
60		DESTDIR=$(LIBBPF_BOOTSTRAP_DESTDIR) prefix= \
61		ARCH= CC=$(HOSTCC) LD=$(HOSTLD) $@ install_headers
62
63$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR)
64	$(call QUIET_INSTALL, $@)
65	$(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<
66
67$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
68	$(call QUIET_CLEAN, libbpf)
69	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
70
71$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
72	$(call QUIET_CLEAN, libbpf-bootstrap)
73	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
74
75prefix ?= /usr/local
76bash_compdir ?= /usr/share/bash-completion/completions
77
78CFLAGS += -O2
79CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
80CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
81CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
82	-I$(if $(OUTPUT),$(OUTPUT),.) \
83	-I$(LIBBPF_INCLUDE) \
84	-I$(srctree)/kernel/bpf/ \
85	-I$(srctree)/tools/include \
86	-I$(srctree)/tools/include/uapi
87CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
88ifneq ($(EXTRA_CFLAGS),)
89CFLAGS += $(EXTRA_CFLAGS)
90endif
91ifneq ($(EXTRA_LDFLAGS),)
92LDFLAGS += $(EXTRA_LDFLAGS)
93endif
94
95INSTALL ?= install
96RM ?= rm -f
97
98FEATURE_USER = .bpftool
99FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
100	clang-bpf-co-re
101FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
102	clang-bpf-co-re
103
104check_feat := 1
105NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
106ifdef MAKECMDGOALS
107ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
108  check_feat := 0
109endif
110endif
111
112ifeq ($(check_feat),1)
113ifeq ($(FEATURES_DUMP),)
114include $(srctree)/tools/build/Makefile.feature
115else
116include $(FEATURES_DUMP)
117endif
118endif
119
120ifeq ($(feature-disassembler-four-args), 1)
121CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
122endif
123
124ifeq ($(feature-reallocarray), 0)
125CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
126endif
127
128LIBS = $(LIBBPF) -lelf -lz
129LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
130ifeq ($(feature-libcap), 1)
131CFLAGS += -DUSE_LIBCAP
132LIBS += -lcap
133endif
134
135include $(wildcard $(OUTPUT)*.d)
136
137all: $(OUTPUT)bpftool
138
139BFD_SRCS = jit_disasm.c
140
141SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
142
143ifeq ($(feature-libbfd),1)
144  LIBS += -lbfd -ldl -lopcodes
145else ifeq ($(feature-libbfd-liberty),1)
146  LIBS += -lbfd -ldl -lopcodes -liberty
147else ifeq ($(feature-libbfd-liberty-z),1)
148  LIBS += -lbfd -ldl -lopcodes -liberty -lz
149endif
150
151ifneq ($(filter -lbfd,$(LIBS)),)
152CFLAGS += -DHAVE_LIBBFD_SUPPORT
153SRCS += $(BFD_SRCS)
154endif
155
156BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
157
158BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
159$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
160
161OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
162$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
163
164VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
165		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
166		     ../../../vmlinux					\
167		     /sys/kernel/btf/vmlinux				\
168		     /boot/vmlinux-$(shell uname -r)
169VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
170
171bootstrap: $(BPFTOOL_BOOTSTRAP)
172
173ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
174ifeq ($(feature-clang-bpf-co-re),1)
175
176BUILD_BPF_SKELS := 1
177
178$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
179ifeq ($(VMLINUX_H),)
180	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
181else
182	$(Q)cp "$(VMLINUX_H)" $@
183endif
184
185$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
186	$(QUIET_CLANG)$(CLANG) \
187		-I$(if $(OUTPUT),$(OUTPUT),.) \
188		-I$(srctree)/tools/include/uapi/ \
189		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
190		-g -O2 -Wall -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
191
192$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
193	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
194
195$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
196
197$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
198
199endif
200endif
201
202CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
203
204$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
205	$(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
206
207$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
208	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
209
210$(OUTPUT)feature.o:
211ifneq ($(feature-zlib), 1)
212	$(error "No zlib found")
213endif
214
215$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
216	$(QUIET_LINK)$(HOSTCC) $(CFLAGS) $(LDFLAGS) -o $@ $(BOOTSTRAP_OBJS) \
217		$(LIBS_BOOTSTRAP)
218
219$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
220	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
221
222$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
223	$(QUIET_CC)$(HOSTCC) \
224		$(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),$(CFLAGS)) \
225		-c -MMD -o $@ $<
226
227$(OUTPUT)%.o: %.c
228	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
229
230feature-detect-clean:
231	$(call QUIET_CLEAN, feature-detect)
232	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
233
234clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
235	$(call QUIET_CLEAN, bpftool)
236	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
237	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
238	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
239	$(call QUIET_CLEAN, core-gen)
240	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
241	$(Q)$(RM) -r -- $(OUTPUT)feature/
242
243install-bin: $(OUTPUT)bpftool
244	$(call QUIET_INSTALL, bpftool)
245	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
246	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
247
248install: install-bin
249	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
250	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
251
252uninstall:
253	$(call QUIET_UNINST, bpftool)
254	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
255	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
256
257doc:
258	$(call descend,Documentation)
259
260doc-clean:
261	$(call descend,Documentation,clean)
262
263doc-install:
264	$(call descend,Documentation,install)
265
266doc-uninstall:
267	$(call descend,Documentation,uninstall)
268
269FORCE:
270
271.SECONDARY:
272.PHONY: all FORCE bootstrap clean install-bin install uninstall
273.PHONY: doc doc-clean doc-install doc-uninstall
274.DEFAULT_GOAL := all
275