xref: /linux/tools/bpf/bpftool/Makefile (revision 249ebf3f65f8530beb2cbfb91bff1d83ba88d23c) 
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
92HOST_CFLAGS := $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
93		$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
94HOST_LDFLAGS := $(LDFLAGS)
95
96INSTALL ?= install
97RM ?= rm -f
98
99FEATURE_USER = .bpftool
100
101FEATURE_TESTS := clang-bpf-co-re
102FEATURE_TESTS += llvm
103FEATURE_TESTS += libcap
104FEATURE_TESTS += libbfd
105FEATURE_TESTS += libbfd-liberty
106FEATURE_TESTS += libbfd-liberty-z
107FEATURE_TESTS += disassembler-four-args
108FEATURE_TESTS += disassembler-init-styled
109
110FEATURE_DISPLAY := clang-bpf-co-re
111FEATURE_DISPLAY += llvm
112FEATURE_DISPLAY += libcap
113FEATURE_DISPLAY += libbfd
114FEATURE_DISPLAY += libbfd-liberty
115FEATURE_DISPLAY += libbfd-liberty-z
116
117check_feat := 1
118NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
119ifdef MAKECMDGOALS
120ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
121  check_feat := 0
122endif
123endif
124
125ifeq ($(check_feat),1)
126ifeq ($(FEATURES_DUMP),)
127include $(srctree)/tools/build/Makefile.feature
128else
129include $(FEATURES_DUMP)
130endif
131endif
132
133LIBS = $(LIBBPF) -lelf -lz
134LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
135ifeq ($(feature-libcap), 1)
136CFLAGS += -DUSE_LIBCAP
137LIBS += -lcap
138endif
139
140include $(wildcard $(OUTPUT)*.d)
141
142all: $(OUTPUT)bpftool
143
144SRCS := $(wildcard *.c)
145
146ifeq ($(feature-llvm),1)
147  # If LLVM is available, use it for JIT disassembly
148  CFLAGS  += -DHAVE_LLVM_SUPPORT
149  LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets
150  CFLAGS  += $(shell $(LLVM_CONFIG) --cflags)
151  LIBS    += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS))
152  ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static)
153    LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS))
154    LIBS += -lstdc++
155  endif
156  LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags)
157else
158  # Fall back on libbfd
159  ifeq ($(feature-libbfd),1)
160    LIBS += -lbfd -ldl -lopcodes
161  else ifeq ($(feature-libbfd-liberty),1)
162    LIBS += -lbfd -ldl -lopcodes -liberty
163  else ifeq ($(feature-libbfd-liberty-z),1)
164    LIBS += -lbfd -ldl -lopcodes -liberty -lz
165  endif
166
167  # If one of the above feature combinations is set, we support libbfd
168  ifneq ($(filter -lbfd,$(LIBS)),)
169    CFLAGS += -DHAVE_LIBBFD_SUPPORT
170
171    # Libbfd interface changed over time, figure out what we need
172    ifeq ($(feature-disassembler-four-args), 1)
173      CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
174    endif
175    ifeq ($(feature-disassembler-init-styled), 1)
176      CFLAGS += -DDISASM_INIT_STYLED
177    endif
178  endif
179endif
180ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)
181  # No support for JIT disassembly
182  SRCS := $(filter-out jit_disasm.c,$(SRCS))
183endif
184
185BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
186
187BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o)
188$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
189
190OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
191$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
192
193VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
194		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
195		     ../../../vmlinux					\
196		     /sys/kernel/btf/vmlinux				\
197		     /boot/vmlinux-$(shell uname -r)
198VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
199
200bootstrap: $(BPFTOOL_BOOTSTRAP)
201
202ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
203ifeq ($(feature-clang-bpf-co-re),1)
204
205BUILD_BPF_SKELS := 1
206
207$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
208ifeq ($(VMLINUX_H),)
209	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
210else
211	$(Q)cp "$(VMLINUX_H)" $@
212endif
213
214$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
215	$(QUIET_CLANG)$(CLANG) \
216		-I$(or $(OUTPUT),.) \
217		-I$(srctree)/tools/include/uapi/ \
218		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
219		-g -O2 -Wall -fno-stack-protector \
220		--target=bpf -c $< -o $@
221	$(Q)$(LLVM_STRIP) -g $@
222
223$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
224	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
225
226$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
227
228$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
229
230endif
231endif
232
233CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
234
235$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
236	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
237
238$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
239	$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
240
241$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
242	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
243
244$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
245	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
246
247$(OUTPUT)%.o: %.c
248	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
249
250feature-detect-clean:
251	$(call QUIET_CLEAN, feature-detect)
252	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
253
254clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
255	$(call QUIET_CLEAN, bpftool)
256	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
257	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
258	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
259	$(call QUIET_CLEAN, core-gen)
260	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
261	$(Q)$(RM) -r -- $(OUTPUT)feature/
262
263install-bin: $(OUTPUT)bpftool
264	$(call QUIET_INSTALL, bpftool)
265	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
266	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
267
268install: install-bin
269	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
270	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
271
272uninstall:
273	$(call QUIET_UNINST, bpftool)
274	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
275	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
276
277doc:
278	$(call descend,Documentation)
279
280doc-clean:
281	$(call descend,Documentation,clean)
282
283doc-install:
284	$(call descend,Documentation,install)
285
286doc-uninstall:
287	$(call descend,Documentation,uninstall)
288
289FORCE:
290
291.SECONDARY:
292.PHONY: all FORCE bootstrap clean install-bin install uninstall
293.PHONY: doc doc-clean doc-install doc-uninstall
294.DEFAULT_GOAL := all
295
296# Delete partially updated (corrupted) files on error
297.DELETE_ON_ERROR:
298