1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2include Makefile.include 3 4ifeq ($(srctree),) 5srctree := $(patsubst %/,%,$(dir $(CURDIR))) 6endif 7 8ifeq ($(V),1) 9 Q = 10else 11 Q = @ 12endif 13 14BPF_DIR = $(srctree)/libbpf/src 15 16ifneq ($(OUTPUT),) 17 _OUTPUT := $(OUTPUT) 18else 19 _OUTPUT := $(CURDIR)/ 20endif 21BOOTSTRAP_OUTPUT := $(_OUTPUT)bootstrap/ 22 23LIBBPF_OUTPUT := $(_OUTPUT)libbpf/ 24LIBBPF_DESTDIR := $(LIBBPF_OUTPUT) 25LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include 26LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf 27LIBBPF := $(LIBBPF_OUTPUT)libbpf.a 28 29LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/ 30LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT) 31LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)include 32LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf 33LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a 34 35# We need to copy hashmap.h, nlattr.h, relo_core.h and libbpf_internal.h 36# which are not otherwise exported by libbpf, but still required by bpftool. 37LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h relo_core.h libbpf_internal.h) 38LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h relo_core.h libbpf_internal.h) 39 40$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_HDRS_DIR): 41 $(QUIET_MKDIR)mkdir -p $@ 42 43$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT) 44 $(Q)$(MAKE) -C $(BPF_DIR) OBJDIR=$(patsubst %/,%,$(LIBBPF_OUTPUT)) \ 45 PREFIX=$(LIBBPF_DESTDIR:/=) $(LIBBPF) install_headers 46 47$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR) 48 $(call QUIET_INSTALL, $@) 49 $(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $< 50 51$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT) 52 $(Q)$(MAKE) -C $(BPF_DIR) OBJDIR=$(patsubst %/,%,$(LIBBPF_BOOTSTRAP_OUTPUT)) \ 53 PREFIX=$(LIBBPF_BOOTSTRAP_DESTDIR:/=) \ 54 ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" $@ install_headers 55 56$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR) 57 $(call QUIET_INSTALL, $@) 58 $(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $< 59 60$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT) 61 $(call QUIET_CLEAN, libbpf) 62 $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null 63 64$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT) 65 $(call QUIET_CLEAN, libbpf-bootstrap) 66 $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null 67 68prefix ?= /usr/local 69bash_compdir ?= /usr/share/bash-completion/completions 70 71CFLAGS += -O2 72CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers 73CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS)) 74CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \ 75 -I$(or $(OUTPUT),.) \ 76 -I$(LIBBPF_INCLUDE) \ 77 -I$(srctree)/src/kernel/bpf/ \ 78 -I$(srctree)/include \ 79 -I$(srctree)/include/uapi 80ifneq ($(BPFTOOL_VERSION),) 81CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"' 82endif 83ifneq ($(EXTRA_CFLAGS),) 84CFLAGS += $(EXTRA_CFLAGS) 85endif 86ifneq ($(EXTRA_LDFLAGS),) 87LDFLAGS += $(EXTRA_LDFLAGS) 88endif 89 90INSTALL ?= install 91RM ?= rm -f 92 93FEATURE_USER = .bpftool 94 95FEATURE_TESTS := clang-bpf-co-re 96FEATURE_TESTS += llvm 97FEATURE_TESTS += libcap 98FEATURE_TESTS += libbfd 99FEATURE_TESTS += libbfd-liberty 100FEATURE_TESTS += libbfd-liberty-z 101FEATURE_TESTS += disassembler-four-args 102FEATURE_TESTS += disassembler-init-styled 103 104FEATURE_DISPLAY := clang-bpf-co-re 105FEATURE_DISPLAY += llvm 106FEATURE_DISPLAY += libcap 107FEATURE_DISPLAY += libbfd 108FEATURE_DISPLAY += libbfd-liberty 109FEATURE_DISPLAY += libbfd-liberty-z 110 111check_feat := 1 112NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall 113ifdef MAKECMDGOALS 114ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) 115 check_feat := 0 116endif 117endif 118 119ifeq ($(check_feat),1) 120include Makefile.feature 121endif 122 123LIBS = $(LIBBPF) -lelf -lz 124LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz 125ifeq ($(feature-libcap), 1) 126CFLAGS += -DUSE_LIBCAP 127LIBS += -lcap 128endif 129 130include $(wildcard $(OUTPUT)*.d) 131 132all: $(OUTPUT)bpftool 133 134SRCS := $(wildcard *.c) 135 136ifeq ($(feature-llvm),1) 137 # If LLVM is available, use it for JIT disassembly 138 CFLAGS += -DHAVE_LLVM_SUPPORT 139 LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets 140 CFLAGS += $(shell $(LLVM_CONFIG) --cflags --libs $(LLVM_CONFIG_LIB_COMPONENTS)) 141 LIBS += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS)) 142 ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static) 143 LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS)) 144 LIBS += -lstdc++ 145 endif 146 LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags) 147else 148 # Fall back on libbfd 149 ifeq ($(feature-libbfd),1) 150 LIBS += -lbfd -ldl -lopcodes 151 else ifeq ($(feature-libbfd-liberty),1) 152 LIBS += -lbfd -ldl -lopcodes -liberty 153 else ifeq ($(feature-libbfd-liberty-z),1) 154 LIBS += -lbfd -ldl -lopcodes -liberty -lz 155 endif 156 157 # If one of the above feature combinations is set, we support libbfd 158 ifneq ($(filter -lbfd,$(LIBS)),) 159 CFLAGS += -DHAVE_LIBBFD_SUPPORT 160 161 # Libbfd interface changed over time, figure out what we need 162 ifeq ($(feature-disassembler-four-args), 1) 163 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE 164 endif 165 ifeq ($(feature-disassembler-init-styled), 1) 166 CFLAGS += -DDISASM_INIT_STYLED 167 endif 168 endif 169endif 170ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),) 171 # No support for JIT disassembly 172 SRCS := $(filter-out jit_disasm.c,$(SRCS)) 173endif 174 175HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\ 176 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS))) 177 178BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool 179 180BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o) 181$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP) 182 183OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o 184$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS) 185 186VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 187 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 188 ../../../vmlinux \ 189 /sys/kernel/btf/vmlinux \ 190 /boot/vmlinux-$(shell uname -r) 191VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 192 193bootstrap: $(BPFTOOL_BOOTSTRAP) 194 195ifneq ($(VMLINUX_BTF)$(VMLINUX_H),) 196ifeq ($(feature-clang-bpf-co-re),1) 197 198BUILD_BPF_SKELS := 1 199 200$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP) 201ifeq ($(VMLINUX_H),) 202 $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@ 203else 204 $(Q)cp "$(VMLINUX_H)" $@ 205endif 206 207$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP) 208 $(QUIET_CLANG)$(CLANG) \ 209 -I$(or $(OUTPUT),.) \ 210 -I$(srctree)/include/uapi/ \ 211 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \ 212 -g -O2 -Wall -fno-stack-protector \ 213 --target=bpf -c $< -o $@ 214 $(Q)$(LLVM_STRIP) -g $@ 215 216$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP) 217 $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@ 218 219$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h 220 221$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h 222 223endif 224endif 225 226CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS) 227 228$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/src/kernel/bpf/disasm.c 229 $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ 230 231$(OUTPUT)disasm.o: $(srctree)/src/kernel/bpf/disasm.c 232 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 233 234$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP) 235 $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@ 236 237$(OUTPUT)bpftool: $(OBJS) $(LIBBPF) 238 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@ 239 240$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT) 241 $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ 242 243$(OUTPUT)%.o: %.c 244 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 245 246feature-detect-clean: 247 $(call QUIET_CLEAN, feature-detect) 248 $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null 249 250clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean 251 $(call QUIET_CLEAN, bpftool) 252 $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d 253 $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h 254 $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) 255 $(call QUIET_CLEAN, core-gen) 256 $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool 257 $(Q)$(RM) -r -- $(OUTPUT)feature/ 258 259install-bin: $(OUTPUT)bpftool 260 $(call QUIET_INSTALL, bpftool) 261 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin 262 $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool 263 264install: install-bin 265 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir) 266 $(Q)$(INSTALL) -m 0644 $(srctree)/bash-completion/bpftool $(DESTDIR)$(bash_compdir) 267 268uninstall: 269 $(call QUIET_UNINST, bpftool) 270 $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool 271 $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool 272 273doc: 274 $(call descend,$(srctree)/docs) 275 276doc-clean: 277 $(call descend,$(srctree)/docs,clean) 278 279doc-install: 280 $(call descend,$(srctree)/docs,install) 281 282doc-uninstall: 283 $(call descend,$(srctree)/docs,uninstall) 284 285FORCE: 286 287.SECONDARY: 288.PHONY: all FORCE bootstrap clean install-bin install uninstall 289.PHONY: doc doc-clean doc-install doc-uninstall 290.DEFAULT_GOAL := all 291 292# Delete partially updated (corrupted) files on error 293.DELETE_ON_ERROR: 294