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