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 LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags) 149else 150 # Fall back on libbfd 151 ifeq ($(feature-libbfd),1) 152 LIBS += -lbfd -ldl -lopcodes 153 else ifeq ($(feature-libbfd-liberty),1) 154 LIBS += -lbfd -ldl -lopcodes -liberty 155 else ifeq ($(feature-libbfd-liberty-z),1) 156 LIBS += -lbfd -ldl -lopcodes -liberty -lz 157 endif 158 159 # If one of the above feature combinations is set, we support libbfd 160 ifneq ($(filter -lbfd,$(LIBS)),) 161 CFLAGS += -DHAVE_LIBBFD_SUPPORT 162 163 # Libbfd interface changed over time, figure out what we need 164 ifeq ($(feature-disassembler-four-args), 1) 165 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE 166 endif 167 ifeq ($(feature-disassembler-init-styled), 1) 168 CFLAGS += -DDISASM_INIT_STYLED 169 endif 170 endif 171endif 172ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),) 173 # No support for JIT disassembly 174 SRCS := $(filter-out jit_disasm.c,$(SRCS)) 175endif 176 177HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\ 178 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS))) 179 180BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool 181 182BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o) 183$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP) 184 185OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o 186$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS) 187 188VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 189 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 190 ../../../vmlinux \ 191 /sys/kernel/btf/vmlinux \ 192 /boot/vmlinux-$(shell uname -r) 193VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 194 195bootstrap: $(BPFTOOL_BOOTSTRAP) 196 197ifneq ($(VMLINUX_BTF)$(VMLINUX_H),) 198ifeq ($(feature-clang-bpf-co-re),1) 199 200BUILD_BPF_SKELS := 1 201 202$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP) 203ifeq ($(VMLINUX_H),) 204 $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@ 205else 206 $(Q)cp "$(VMLINUX_H)" $@ 207endif 208 209$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP) 210 $(QUIET_CLANG)$(CLANG) \ 211 -I$(or $(OUTPUT),.) \ 212 -I$(srctree)/tools/include/uapi/ \ 213 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \ 214 -g -O2 -Wall -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 $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS) 228 229$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c 230 $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ 231 232$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c 233 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 234 235$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP) 236 $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@ 237 238$(OUTPUT)bpftool: $(OBJS) $(LIBBPF) 239 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@ 240 241$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT) 242 $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@ 243 244$(OUTPUT)%.o: %.c 245 $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@ 246 247feature-detect-clean: 248 $(call QUIET_CLEAN, feature-detect) 249 $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null 250 251clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean 252 $(call QUIET_CLEAN, bpftool) 253 $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d 254 $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h 255 $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) 256 $(call QUIET_CLEAN, core-gen) 257 $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool 258 $(Q)$(RM) -r -- $(OUTPUT)feature/ 259 260install-bin: $(OUTPUT)bpftool 261 $(call QUIET_INSTALL, bpftool) 262 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin 263 $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool 264 265install: install-bin 266 $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir) 267 $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir) 268 269uninstall: 270 $(call QUIET_UNINST, bpftool) 271 $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool 272 $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool 273 274doc: 275 $(call descend,Documentation) 276 277doc-clean: 278 $(call descend,Documentation,clean) 279 280doc-install: 281 $(call descend,Documentation,install) 282 283doc-uninstall: 284 $(call descend,Documentation,uninstall) 285 286FORCE: 287 288.SECONDARY: 289.PHONY: all FORCE bootstrap clean install-bin install uninstall 290.PHONY: doc doc-clean doc-install doc-uninstall 291.DEFAULT_GOAL := all 292