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 69CFLAGS += -Wall 70CFLAGS += -Wextra 71CFLAGS += -Wformat-signedness 72CFLAGS += -Wno-unused-parameter 73CFLAGS += -Wno-missing-field-initializers 74CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS)) 75CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \ 76 -I$(or $(OUTPUT),.) \ 77 -I$(LIBBPF_INCLUDE) \ 78 -I$(srctree)/kernel/bpf/ \ 79 -I$(srctree)/tools/include \ 80 -I$(srctree)/tools/include/uapi 81ifneq ($(BPFTOOL_VERSION),) 82CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"' 83endif 84ifneq ($(EXTRA_CFLAGS),) 85CFLAGS += $(EXTRA_CFLAGS) 86endif 87ifneq ($(EXTRA_LDFLAGS),) 88LDFLAGS += $(EXTRA_LDFLAGS) 89endif 90 91HOST_CFLAGS := $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\ 92 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS))) 93HOST_LDFLAGS := $(LDFLAGS) 94 95INSTALL ?= install 96RM ?= rm -f 97 98FEATURE_USER = .bpftool 99 100FEATURE_TESTS := clang-bpf-co-re 101FEATURE_TESTS += llvm 102FEATURE_TESTS += libcap 103FEATURE_TESTS += libbfd 104FEATURE_TESTS += libbfd-liberty 105FEATURE_TESTS += libbfd-liberty-z 106FEATURE_TESTS += disassembler-four-args 107FEATURE_TESTS += disassembler-init-styled 108FEATURE_TESTS += libelf-zstd 109 110FEATURE_DISPLAY := clang-bpf-co-re 111FEATURE_DISPLAY += llvm 112FEATURE_DISPLAY += libcap 113FEATURE_DISPLAY += libbfd 114FEATURE_DISPLAY += libbfd-liberty 115FEATURE_DISPLAY += libbfd-liberty-z 116 117check_feat := 1 118NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall 119ifdef MAKECMDGOALS 120ifeq ($(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 -lcrypto 134LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz -lcrypto 135 136ifeq ($(feature-libelf-zstd),1) 137LIBS += -lzstd 138LIBS_BOOTSTRAP += -lzstd 139endif 140 141ifeq ($(feature-libcap), 1) 142CFLAGS += -DUSE_LIBCAP 143LIBS += -lcap 144endif 145 146include $(wildcard $(OUTPUT)*.d) 147 148all: $(OUTPUT)bpftool 149 150SRCS := $(wildcard *.c) 151 152ifeq ($(feature-llvm),1) 153 # If LLVM is available, use it for JIT disassembly 154 CFLAGS += -DHAVE_LLVM_SUPPORT 155 LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets 156 # llvm-config always adds -D_GNU_SOURCE, however, it may already be in CFLAGS 157 # (e.g. when bpftool build is called from selftests build as selftests 158 # Makefile includes lib.mk which sets -D_GNU_SOURCE) which would cause 159 # compilation error due to redefinition. Let's filter it out here. 160 CFLAGS += $(filter-out -D_GNU_SOURCE,$(shell $(LLVM_CONFIG) --cflags)) 161 LIBS += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS)) 162 ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static) 163 LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS)) 164 LIBS += -lstdc++ 165 endif 166 LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags) 167else 168 # Fall back on libbfd 169 ifeq ($(feature-libbfd),1) 170 LIBS += -lbfd -ldl -lopcodes 171 else ifeq ($(feature-libbfd-liberty),1) 172 LIBS += -lbfd -ldl -lopcodes -liberty 173 else ifeq ($(feature-libbfd-liberty-z),1) 174 LIBS += -lbfd -ldl -lopcodes -liberty -lz 175 endif 176 177 # If one of the above feature combinations is set, we support libbfd 178 ifneq ($(filter -lbfd,$(LIBS)),) 179 CFLAGS += -DHAVE_LIBBFD_SUPPORT 180 181 # Libbfd interface changed over time, figure out what we need 182 ifeq ($(feature-disassembler-four-args), 1) 183 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE 184 endif 185 ifeq ($(feature-disassembler-init-styled), 1) 186 CFLAGS += -DDISASM_INIT_STYLED 187 endif 188 endif 189endif 190ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),) 191 # No support for JIT disassembly 192 SRCS := $(filter-out jit_disasm.c,$(SRCS)) 193endif 194 195BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool 196 197BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o sign.o) 198$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP) 199 200OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o 201$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS) 202 203VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 204 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 205 ../../../vmlinux \ 206 /sys/kernel/btf/vmlinux \ 207 /boot/vmlinux-$(shell uname -r) 208VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 209 210bootstrap: $(BPFTOOL_BOOTSTRAP) 211 212ifneq ($(VMLINUX_BTF)$(VMLINUX_H),) 213ifeq ($(feature-clang-bpf-co-re),1) 214 215BUILD_BPF_SKELS := 1 216 217ifeq ($(VMLINUX_H),) 218$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP) 219 $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@ 220else 221$(OUTPUT)vmlinux.h: $(VMLINUX_H) 222 $(Q)cp "$(VMLINUX_H)" $@ 223endif 224 225$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP) 226 $(QUIET_CLANG)$(CLANG) \ 227 -Wno-microsoft-anon-tag \ 228 -fms-extensions \ 229 -I$(or $(OUTPUT),.) \ 230 -I$(srctree)/tools/include/uapi/ \ 231 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \ 232 -g -O2 -Wall -fno-stack-protector \ 233 --target=bpf -c $< -o $@ 234 $(Q)$(LLVM_STRIP) -g $@ 235 236$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP) 237 $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@ 238 239$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h 240 241$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h 242 243endif 244endif 245 246CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS) 247 248$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c 249 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 250 251$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP) 252 $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@ 253 254$(OUTPUT)bpftool: $(OBJS) $(LIBBPF) 255 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@ 256 257$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT) 258 $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ 259 260$(OUTPUT)%.o: %.c 261 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 262 263feature-detect-clean: 264 $(call QUIET_CLEAN, feature-detect) 265 $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null 266 267clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean 268 $(call QUIET_CLEAN, bpftool) 269 $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d 270 $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h 271 $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) 272 $(call QUIET_CLEAN, core-gen) 273 $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool 274 $(Q)$(RM) -r -- $(OUTPUT)feature/ 275 276install-bin: $(OUTPUT)bpftool 277 $(call QUIET_INSTALL, bpftool) 278 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin 279 $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool 280 281install: install-bin 282 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir) 283 $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir) 284 285uninstall: 286 $(call QUIET_UNINST, bpftool) 287 $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool 288 $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool 289 290doc: 291 $(call descend,Documentation) 292 293doc-clean: 294 $(call descend,Documentation,clean) 295 296doc-install: 297 $(call descend,Documentation,install) 298 299doc-uninstall: 300 $(call descend,Documentation,uninstall) 301 302FORCE: 303 304.SECONDARY: 305.PHONY: all FORCE bootstrap clean install-bin install uninstall 306.PHONY: doc doc-clean doc-install doc-uninstall 307.DEFAULT_GOAL := all 308 309# Delete partially updated (corrupted) files on error 310.DELETE_ON_ERROR: 311