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