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 75CFLAGS += -Wall 76CFLAGS += -Wextra 77CFLAGS += -Wformat-signedness 78CFLAGS += -Wno-unused-parameter 79CFLAGS += -Wno-missing-field-initializers 80CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS)) 81CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \ 82 -I$(or $(OUTPUT),.) \ 83 -I$(LIBBPF_INCLUDE) \ 84 -I$(srctree)/kernel/bpf/ \ 85 -I$(srctree)/tools/include \ 86 -I$(srctree)/tools/include/uapi 87ifneq ($(BPFTOOL_VERSION),) 88CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"' 89endif 90ifneq ($(EXTRA_CFLAGS),) 91CFLAGS += $(EXTRA_CFLAGS) 92endif 93ifneq ($(EXTRA_LDFLAGS),) 94LDFLAGS += $(EXTRA_LDFLAGS) 95endif 96 97HOST_CFLAGS := $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\ 98 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS))) 99HOST_LDFLAGS := $(LDFLAGS) 100 101INSTALL ?= install 102RM ?= rm -f 103 104FEATURE_USER = .bpftool 105 106FEATURE_TESTS := clang-bpf-co-re 107FEATURE_TESTS += llvm 108FEATURE_TESTS += libcap 109FEATURE_TESTS += libbfd 110FEATURE_TESTS += libbfd-liberty 111FEATURE_TESTS += libbfd-liberty-z 112FEATURE_TESTS += disassembler-four-args 113FEATURE_TESTS += disassembler-init-styled 114FEATURE_TESTS += libelf-zstd 115 116FEATURE_DISPLAY := clang-bpf-co-re 117FEATURE_DISPLAY += llvm 118FEATURE_DISPLAY += libcap 119FEATURE_DISPLAY += libbfd 120FEATURE_DISPLAY += libbfd-liberty 121FEATURE_DISPLAY += libbfd-liberty-z 122 123check_feat := 1 124NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall 125ifdef MAKECMDGOALS 126ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) 127 check_feat := 0 128endif 129endif 130 131ifeq ($(check_feat),1) 132ifeq ($(FEATURES_DUMP),) 133include $(srctree)/tools/build/Makefile.feature 134else 135include $(FEATURES_DUMP) 136endif 137endif 138 139LIBS = $(LIBBPF) -lelf -lz 140LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz 141 142ifeq ($(feature-libelf-zstd),1) 143LIBS += -lzstd 144LIBS_BOOTSTRAP += -lzstd 145endif 146 147ifeq ($(feature-libcap), 1) 148CFLAGS += -DUSE_LIBCAP 149LIBS += -lcap 150endif 151 152include $(wildcard $(OUTPUT)*.d) 153 154all: $(OUTPUT)bpftool 155 156SRCS := $(wildcard *.c) 157 158ifeq ($(feature-llvm),1) 159 # If LLVM is available, use it for JIT disassembly 160 CFLAGS += -DHAVE_LLVM_SUPPORT 161 LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets 162 # llvm-config always adds -D_GNU_SOURCE, however, it may already be in CFLAGS 163 # (e.g. when bpftool build is called from selftests build as selftests 164 # Makefile includes lib.mk which sets -D_GNU_SOURCE) which would cause 165 # compilation error due to redefinition. Let's filter it out here. 166 CFLAGS += $(filter-out -D_GNU_SOURCE,$(shell $(LLVM_CONFIG) --cflags)) 167 LIBS += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS)) 168 ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static) 169 LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS)) 170 LIBS += -lstdc++ 171 endif 172 LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags) 173else 174 # Fall back on libbfd 175 ifeq ($(feature-libbfd),1) 176 LIBS += -lbfd -ldl -lopcodes 177 else ifeq ($(feature-libbfd-liberty),1) 178 LIBS += -lbfd -ldl -lopcodes -liberty 179 else ifeq ($(feature-libbfd-liberty-z),1) 180 LIBS += -lbfd -ldl -lopcodes -liberty -lz 181 endif 182 183 # If one of the above feature combinations is set, we support libbfd 184 ifneq ($(filter -lbfd,$(LIBS)),) 185 CFLAGS += -DHAVE_LIBBFD_SUPPORT 186 187 # Libbfd interface changed over time, figure out what we need 188 ifeq ($(feature-disassembler-four-args), 1) 189 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE 190 endif 191 ifeq ($(feature-disassembler-init-styled), 1) 192 CFLAGS += -DDISASM_INIT_STYLED 193 endif 194 endif 195endif 196ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),) 197 # No support for JIT disassembly 198 SRCS := $(filter-out jit_disasm.c,$(SRCS)) 199endif 200 201BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool 202 203BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o) 204$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP) 205 206OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o 207$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS) 208 209VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 210 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 211 ../../../vmlinux \ 212 /sys/kernel/btf/vmlinux \ 213 /boot/vmlinux-$(shell uname -r) 214VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 215 216bootstrap: $(BPFTOOL_BOOTSTRAP) 217 218ifneq ($(VMLINUX_BTF)$(VMLINUX_H),) 219ifeq ($(feature-clang-bpf-co-re),1) 220 221BUILD_BPF_SKELS := 1 222 223ifeq ($(VMLINUX_H),) 224$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP) 225 $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@ 226else 227$(OUTPUT)vmlinux.h: $(VMLINUX_H) 228 $(Q)cp "$(VMLINUX_H)" $@ 229endif 230 231$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP) 232 $(QUIET_CLANG)$(CLANG) \ 233 -I$(or $(OUTPUT),.) \ 234 -I$(srctree)/tools/include/uapi/ \ 235 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \ 236 -g -O2 -Wall -fno-stack-protector \ 237 --target=bpf -c $< -o $@ 238 $(Q)$(LLVM_STRIP) -g $@ 239 240$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP) 241 $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@ 242 243$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h 244 245$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h 246 247endif 248endif 249 250CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS) 251 252$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c 253 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 254 255$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP) 256 $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@ 257 258$(OUTPUT)bpftool: $(OBJS) $(LIBBPF) 259 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@ 260 261$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT) 262 $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ 263 264$(OUTPUT)%.o: %.c 265 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 266 267feature-detect-clean: 268 $(call QUIET_CLEAN, feature-detect) 269 $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null 270 271clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean 272 $(call QUIET_CLEAN, bpftool) 273 $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d 274 $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h 275 $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) 276 $(call QUIET_CLEAN, core-gen) 277 $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool 278 $(Q)$(RM) -r -- $(OUTPUT)feature/ 279 280install-bin: $(OUTPUT)bpftool 281 $(call QUIET_INSTALL, bpftool) 282 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin 283 $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool 284 285install: install-bin 286 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir) 287 $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir) 288 289uninstall: 290 $(call QUIET_UNINST, bpftool) 291 $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool 292 $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool 293 294doc: 295 $(call descend,Documentation) 296 297doc-clean: 298 $(call descend,Documentation,clean) 299 300doc-install: 301 $(call descend,Documentation,install) 302 303doc-uninstall: 304 $(call descend,Documentation,uninstall) 305 306FORCE: 307 308.SECONDARY: 309.PHONY: all FORCE bootstrap clean install-bin install uninstall 310.PHONY: doc doc-clean doc-install doc-uninstall 311.DEFAULT_GOAL := all 312 313# Delete partially updated (corrupted) files on error 314.DELETE_ON_ERROR: 315