xref: /linux/tools/bpf/bpftool/Makefile (revision 9f5270d758d955506dcb114cb863a86b30a4c783)
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
10BPF_DIR = $(srctree)/tools/lib/bpf
11
12ifneq ($(OUTPUT),)
13  _OUTPUT := $(OUTPUT)
14else
15  _OUTPUT := $(CURDIR)/
16endif
17BOOTSTRAP_OUTPUT := $(_OUTPUT)bootstrap/
18
19LIBBPF_OUTPUT := $(_OUTPUT)libbpf/
20LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
21LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
22LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
23LIBBPF := $(LIBBPF_OUTPUT)libbpf.a
24
25LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/
26LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT)
27LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)include
28LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf
29LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
30
31# We need to copy hashmap.h, nlattr.h, relo_core.h and libbpf_internal.h
32# which are not otherwise exported by libbpf, but still required by bpftool.
33LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h relo_core.h libbpf_internal.h)
34LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h relo_core.h libbpf_internal.h)
35
36$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_HDRS_DIR):
37	$(QUIET_MKDIR)mkdir -p $@
38
39$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT)
40	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) \
41		DESTDIR=$(LIBBPF_DESTDIR:/=) prefix= $(LIBBPF) install_headers
42
43$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR)
44	$(call QUIET_INSTALL, $@)
45	$(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<
46
47$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT)
48	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \
49		DESTDIR=$(LIBBPF_BOOTSTRAP_DESTDIR:/=) prefix= \
50		ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" $@ install_headers
51
52$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR)
53	$(call QUIET_INSTALL, $@)
54	$(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<
55
56$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
57	$(call QUIET_CLEAN, libbpf)
58	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
59
60$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
61	$(call QUIET_CLEAN, libbpf-bootstrap)
62	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
63
64prefix ?= /usr/local
65bash_compdir ?= /usr/share/bash-completion/completions
66
67CFLAGS += -O2
68CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
69CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
70CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
71	-I$(or $(OUTPUT),.) \
72	-I$(LIBBPF_INCLUDE) \
73	-I$(srctree)/kernel/bpf/ \
74	-I$(srctree)/tools/include \
75	-I$(srctree)/tools/include/uapi
76ifneq ($(BPFTOOL_VERSION),)
77CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
78endif
79ifneq ($(EXTRA_CFLAGS),)
80CFLAGS += $(EXTRA_CFLAGS)
81endif
82ifneq ($(EXTRA_LDFLAGS),)
83LDFLAGS += $(EXTRA_LDFLAGS)
84endif
85
86HOST_CFLAGS := $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
87		$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
88HOST_LDFLAGS := $(LDFLAGS)
89
90INSTALL ?= install
91RM ?= rm -f
92
93FEATURE_USER = .bpftool
94
95FEATURE_TESTS := clang-bpf-co-re
96FEATURE_TESTS += llvm
97FEATURE_TESTS += libcap
98FEATURE_TESTS += libbfd
99FEATURE_TESTS += libbfd-liberty
100FEATURE_TESTS += libbfd-liberty-z
101FEATURE_TESTS += disassembler-four-args
102FEATURE_TESTS += disassembler-init-styled
103FEATURE_TESTS += libelf-zstd
104
105FEATURE_DISPLAY := clang-bpf-co-re
106FEATURE_DISPLAY += llvm
107FEATURE_DISPLAY += libcap
108FEATURE_DISPLAY += libbfd
109FEATURE_DISPLAY += libbfd-liberty
110FEATURE_DISPLAY += libbfd-liberty-z
111
112check_feat := 1
113NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
114ifdef MAKECMDGOALS
115ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
116  check_feat := 0
117endif
118endif
119
120ifeq ($(check_feat),1)
121ifeq ($(FEATURES_DUMP),)
122include $(srctree)/tools/build/Makefile.feature
123else
124include $(FEATURES_DUMP)
125endif
126endif
127
128LIBS = $(LIBBPF) -lelf -lz
129LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
130
131ifeq ($(feature-libelf-zstd),1)
132LIBS += -lzstd
133LIBS_BOOTSTRAP += -lzstd
134endif
135
136ifeq ($(feature-libcap), 1)
137CFLAGS += -DUSE_LIBCAP
138LIBS += -lcap
139endif
140
141include $(wildcard $(OUTPUT)*.d)
142
143all: $(OUTPUT)bpftool
144
145SRCS := $(wildcard *.c)
146
147ifeq ($(feature-llvm),1)
148  # If LLVM is available, use it for JIT disassembly
149  CFLAGS  += -DHAVE_LLVM_SUPPORT
150  LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets
151  # llvm-config always adds -D_GNU_SOURCE, however, it may already be in CFLAGS
152  # (e.g. when bpftool build is called from selftests build as selftests
153  # Makefile includes lib.mk which sets -D_GNU_SOURCE) which would cause
154  # compilation error due to redefinition. Let's filter it out here.
155  CFLAGS  += $(filter-out -D_GNU_SOURCE,$(shell $(LLVM_CONFIG) --cflags))
156  LIBS    += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS))
157  ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static)
158    LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS))
159    LIBS += -lstdc++
160  endif
161  LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags)
162else
163  # Fall back on libbfd
164  ifeq ($(feature-libbfd),1)
165    LIBS += -lbfd -ldl -lopcodes
166  else ifeq ($(feature-libbfd-liberty),1)
167    LIBS += -lbfd -ldl -lopcodes -liberty
168  else ifeq ($(feature-libbfd-liberty-z),1)
169    LIBS += -lbfd -ldl -lopcodes -liberty -lz
170  endif
171
172  # If one of the above feature combinations is set, we support libbfd
173  ifneq ($(filter -lbfd,$(LIBS)),)
174    CFLAGS += -DHAVE_LIBBFD_SUPPORT
175
176    # Libbfd interface changed over time, figure out what we need
177    ifeq ($(feature-disassembler-four-args), 1)
178      CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
179    endif
180    ifeq ($(feature-disassembler-init-styled), 1)
181      CFLAGS += -DDISASM_INIT_STYLED
182    endif
183  endif
184endif
185ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)
186  # No support for JIT disassembly
187  SRCS := $(filter-out jit_disasm.c,$(SRCS))
188endif
189
190BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
191
192BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o)
193$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
194
195OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
196$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
197
198VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
199		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
200		     ../../../vmlinux					\
201		     /sys/kernel/btf/vmlinux				\
202		     /boot/vmlinux-$(shell uname -r)
203VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
204
205bootstrap: $(BPFTOOL_BOOTSTRAP)
206
207ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
208ifeq ($(feature-clang-bpf-co-re),1)
209
210BUILD_BPF_SKELS := 1
211
212ifeq ($(VMLINUX_H),)
213$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
214	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
215else
216$(OUTPUT)vmlinux.h: $(VMLINUX_H)
217	$(Q)cp "$(VMLINUX_H)" $@
218endif
219
220$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
221	$(QUIET_CLANG)$(CLANG) \
222		-I$(or $(OUTPUT),.) \
223		-I$(srctree)/tools/include/uapi/ \
224		-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
225		-g -O2 -Wall -fno-stack-protector \
226		--target=bpf -c $< -o $@
227	$(Q)$(LLVM_STRIP) -g $@
228
229$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
230	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
231
232$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
233
234$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
235
236endif
237endif
238
239CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
240
241$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
242	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
243
244$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
245	$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
246
247$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
248	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
249
250$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
251	$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
252
253$(OUTPUT)%.o: %.c
254	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
255
256feature-detect-clean:
257	$(call QUIET_CLEAN, feature-detect)
258	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
259
260clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
261	$(call QUIET_CLEAN, bpftool)
262	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
263	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
264	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
265	$(call QUIET_CLEAN, core-gen)
266	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
267	$(Q)$(RM) -r -- $(OUTPUT)feature/
268
269install-bin: $(OUTPUT)bpftool
270	$(call QUIET_INSTALL, bpftool)
271	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
272	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
273
274install: install-bin
275	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
276	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
277
278uninstall:
279	$(call QUIET_UNINST, bpftool)
280	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
281	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
282
283doc:
284	$(call descend,Documentation)
285
286doc-clean:
287	$(call descend,Documentation,clean)
288
289doc-install:
290	$(call descend,Documentation,install)
291
292doc-uninstall:
293	$(call descend,Documentation,uninstall)
294
295FORCE:
296
297.SECONDARY:
298.PHONY: all FORCE bootstrap clean install-bin install uninstall
299.PHONY: doc doc-clean doc-install doc-uninstall
300.DEFAULT_GOAL := all
301
302# Delete partially updated (corrupted) files on error
303.DELETE_ON_ERROR:
304