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