xref: /openbmc/linux/tools/bpf/bpftool/Makefile (revision 465d0eb0) 
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 $(srctree)))
8endif
9
10ifeq ($(V),1)
11  Q =
12else
13  Q = @
14endif
15
16BPF_DIR = $(srctree)/tools/lib/bpf
17
18ifneq ($(OUTPUT),)
19  _OUTPUT := $(OUTPUT)
20else
21  _OUTPUT := $(CURDIR)/
22endif
23BOOTSTRAP_OUTPUT := $(_OUTPUT)bootstrap/
24
25LIBBPF_OUTPUT := $(_OUTPUT)libbpf/
26LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
27LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
28LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
29LIBBPF := $(LIBBPF_OUTPUT)libbpf.a
30
31LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/
32LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT)
33LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)include
34LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf
35LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
36
37# We need to copy hashmap.h, nlattr.h, relo_core.h and libbpf_internal.h
38# which are not otherwise exported by libbpf, but still required by bpftool.
39LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h relo_core.h libbpf_internal.h)
40LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h relo_core.h libbpf_internal.h)
41
42$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_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		DESTDIR=$(LIBBPF_BOOTSTRAP_DESTDIR:/=) prefix= \
56		ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) $@ install_headers
57
58$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR)
59	$(call QUIET_INSTALL, $@)
60	$(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<
61
62$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
63	$(call QUIET_CLEAN, libbpf)
64	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
65
66$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
67	$(call QUIET_CLEAN, libbpf-bootstrap)
68	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
69
70prefix ?= /usr/local
71bash_compdir ?= /usr/share/bash-completion/completions
72
73CFLAGS += -O2
74CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
75CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
76CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
77	-I$(or $(OUTPUT),.) \
78	-I$(LIBBPF_INCLUDE) \
79	-I$(srctree)/kernel/bpf/ \
80	-I$(srctree)/tools/include \
81	-I$(srctree)/tools/include/uapi
82ifneq ($(BPFTOOL_VERSION),)
83CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
84endif
85ifneq ($(EXTRA_CFLAGS),)
86CFLAGS += $(EXTRA_CFLAGS)
87endif
88ifneq ($(EXTRA_LDFLAGS),)
89LDFLAGS += $(EXTRA_LDFLAGS)
90endif
91
92INSTALL ?= install
93RM ?= rm -f
94
95FEATURE_USER = .bpftool
96FEATURE_TESTS = libbfd libbfd-liberty libbfd-liberty-z \
97	disassembler-four-args disassembler-init-styled libcap \
98	clang-bpf-co-re
99FEATURE_DISPLAY = libbfd libbfd-liberty libbfd-liberty-z \
100	libcap clang-bpf-co-re
101
102check_feat := 1
103NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
104ifdef MAKECMDGOALS
105ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
106  check_feat := 0
107endif
108endif
109
110ifeq ($(check_feat),1)
111ifeq ($(FEATURES_DUMP),)
112include $(srctree)/tools/build/Makefile.feature
113else
114include $(FEATURES_DUMP)
115endif
116endif
117
118ifeq ($(feature-disassembler-four-args), 1)
119CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
120endif
121ifeq ($(feature-disassembler-init-styled), 1)
122    CFLAGS += -DDISASM_INIT_STYLED
123endif
124
125LIBS = $(LIBBPF) -lelf -lz
126LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
127ifeq ($(feature-libcap), 1)
128CFLAGS += -DUSE_LIBCAP
129LIBS += -lcap
130endif
131
132include $(wildcard $(OUTPUT)*.d)
133
134all: $(OUTPUT)bpftool
135
136BFD_SRCS = jit_disasm.c
137
138SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
139
140ifeq ($(feature-libbfd),1)
141  LIBS += -lbfd -ldl -lopcodes
142else ifeq ($(feature-libbfd-liberty),1)
143  LIBS += -lbfd -ldl -lopcodes -liberty
144else ifeq ($(feature-libbfd-liberty-z),1)
145  LIBS += -lbfd -ldl -lopcodes -liberty -lz
146endif
147
148ifneq ($(filter -lbfd,$(LIBS)),)
149CFLAGS += -DHAVE_LIBBFD_SUPPORT
150SRCS += $(BFD_SRCS)
151endif
152
153HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
154		$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
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$(or $(OUTPUT),.) \
188		-I$(srctree)/tools/include/uapi/ \
189		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
190		-g -O2 -Wall -target bpf -c $< -o $@
191	$(Q)$(LLVM_STRIP) -g $@
192
193$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
194	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
195
196$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
197
198$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
199
200endif
201endif
202
203CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
204
205$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
206	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
207
208$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
209	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
210
211$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
212	$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
213
214$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
215	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
216
217$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
218	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
219
220$(OUTPUT)%.o: %.c
221	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
222
223feature-detect-clean:
224	$(call QUIET_CLEAN, feature-detect)
225	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
226
227clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
228	$(call QUIET_CLEAN, bpftool)
229	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
230	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
231	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
232	$(call QUIET_CLEAN, core-gen)
233	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
234	$(Q)$(RM) -r -- $(OUTPUT)feature/
235
236install-bin: $(OUTPUT)bpftool
237	$(call QUIET_INSTALL, bpftool)
238	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
239	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
240
241install: install-bin
242	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
243	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
244
245uninstall:
246	$(call QUIET_UNINST, bpftool)
247	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
248	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
249
250doc:
251	$(call descend,Documentation)
252
253doc-clean:
254	$(call descend,Documentation,clean)
255
256doc-install:
257	$(call descend,Documentation,install)
258
259doc-uninstall:
260	$(call descend,Documentation,uninstall)
261
262FORCE:
263
264.SECONDARY:
265.PHONY: all FORCE bootstrap clean install-bin install uninstall
266.PHONY: doc doc-clean doc-install doc-uninstall
267.DEFAULT_GOAL := all
268