tools/bpf/bpftool/Makefile

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 include ../../scripts/Makefile.include
   3
   4 ifeq ($(srctree),)
   5 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
   6 srctree := $(patsubst %/,%,$(dir $(srctree)))
   7 srctree := $(patsubst %/,%,$(dir $(srctree)))
   8 endif
   9
  10 ifeq ($(V),1)
  11   Q =
  12 else
  13   Q = @
  14 endif
  15
  16 BPF_DIR = $(srctree)/tools/lib/bpf
  17
  18 ifneq ($(OUTPUT),)
  19   _OUTPUT := $(OUTPUT)
  20 else
  21   _OUTPUT := $(CURDIR)/
  22 endif
  23 BOOTSTRAP_OUTPUT := $(_OUTPUT)bootstrap/
  24
  25 LIBBPF_OUTPUT := $(_OUTPUT)libbpf/
  26 LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
  27 LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
  28 LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
  29 LIBBPF := $(LIBBPF_OUTPUT)libbpf.a
  30
  31 LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/
  32 LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT)
  33 LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)include
  34 LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf
  35 LIBBPF_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.
  39 LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h relo_core.h libbpf_internal.h)
  40 LIBBPF_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
  70 prefix ?= /usr/local
  71 bash_compdir ?= /usr/share/bash-completion/completions
  72
  73 CFLAGS += -O2
  74 CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
  75 CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
  76 CFLAGS += -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$(srctree)/tools/include/uapi
  82 ifneq ($(BPFTOOL_VERSION),)
  83 CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
  84 endif
  85 ifneq ($(EXTRA_CFLAGS),)
  86 CFLAGS += $(EXTRA_CFLAGS)
  87 endif
  88 ifneq ($(EXTRA_LDFLAGS),)
  89 LDFLAGS += $(EXTRA_LDFLAGS)
  90 endif
  91
  92 INSTALL ?= install
  93 RM ?= rm -f
  94
  95 FEATURE_USER = .bpftool
  96 FEATURE_TESTS = libbfd disassembler-four-args libcap clang-bpf-co-re
  97 FEATURE_DISPLAY = libbfd disassembler-four-args libcap clang-bpf-co-re
  98
  99 check_feat := 1
 100 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
 101 ifdef MAKECMDGOALS
 102 ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
 103   check_feat := 0
 104 endif
 105 endif
 106
 107 ifeq ($(check_feat),1)
 108 ifeq ($(FEATURES_DUMP),)
 109 include $(srctree)/tools/build/Makefile.feature
 110 else
 111 include $(FEATURES_DUMP)
 112 endif
 113 endif
 114
 115 ifeq ($(feature-disassembler-four-args), 1)
 116 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
 117 endif
 118
 119 LIBS = $(LIBBPF) -lelf -lz
 120 LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
 121 ifeq ($(feature-libcap), 1)
 122 CFLAGS += -DUSE_LIBCAP
 123 LIBS += -lcap
 124 endif
 125
 126 include $(wildcard $(OUTPUT)*.d)
 127
 128 all: $(OUTPUT)bpftool
 129
 130 BFD_SRCS = jit_disasm.c
 131
 132 SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
 133
 134 ifeq ($(feature-libbfd),1)
 135   LIBS += -lbfd -ldl -lopcodes
 136 else ifeq ($(feature-libbfd-liberty),1)
 137   LIBS += -lbfd -ldl -lopcodes -liberty
 138 else ifeq ($(feature-libbfd-liberty-z),1)
 139   LIBS += -lbfd -ldl -lopcodes -liberty -lz
 140 endif
 141
 142 ifneq ($(filter -lbfd,$(LIBS)),)
 143 CFLAGS += -DHAVE_LIBBFD_SUPPORT
 144 SRCS += $(BFD_SRCS)
 145 endif
 146
 147 HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
 148                 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
 149
 150 BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
 151
 152 BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
 153 $(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
 154
 155 OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
 156 $(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
 157
 158 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 159                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 160                      ../../../vmlinux                                   \
 161                      /sys/kernel/btf/vmlinux                            \
 162                      /boot/vmlinux-$(shell uname -r)
 163 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 164
 165 bootstrap: $(BPFTOOL_BOOTSTRAP)
 166
 167 ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
 168 ifeq ($(feature-clang-bpf-co-re),1)
 169
 170 BUILD_BPF_SKELS := 1
 171
 172 $(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
 173 ifeq ($(VMLINUX_H),)
 174         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
 175 else
 176         $(Q)cp "$(VMLINUX_H)" $@
 177 endif
 178
 179 $(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
 180         $(QUIET_CLANG)$(CLANG) \
 181                 -I$(or $(OUTPUT),.) \
 182                 -I$(srctree)/tools/include/uapi/ \
 183                 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \
 184                 -g -O2 -Wall -target bpf -c $< -o $@
 185         $(Q)$(LLVM_STRIP) -g $@
 186
 187 $(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
 188         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
 189
 190 $(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
 191
 192 $(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
 193
 194 endif
 195 endif
 196
 197 CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
 198
 199 $(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 200         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 201
 202 $(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 203         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 204
 205 $(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
 206         $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
 207
 208 $(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
 209         $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
 210
 211 $(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
 212         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 213
 214 $(OUTPUT)%.o: %.c
 215         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 216
 217 feature-detect-clean:
 218         $(call QUIET_CLEAN, feature-detect)
 219         $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
 220
 221 clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
 222         $(call QUIET_CLEAN, bpftool)
 223         $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
 224         $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
 225         $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
 226         $(call QUIET_CLEAN, core-gen)
 227         $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
 228         $(Q)$(RM) -r -- $(OUTPUT)feature/
 229
 230 install-bin: $(OUTPUT)bpftool
 231         $(call QUIET_INSTALL, bpftool)
 232         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
 233         $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
 234
 235 install: install-bin
 236         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
 237         $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
 238
 239 uninstall:
 240         $(call QUIET_UNINST, bpftool)
 241         $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
 242         $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
 243
 244 doc:
 245         $(call descend,Documentation)
 246
 247 doc-clean:
 248         $(call descend,Documentation,clean)
 249
 250 doc-install:
 251         $(call descend,Documentation,install)
 252
 253 doc-uninstall:
 254         $(call descend,Documentation,uninstall)
 255
 256 FORCE:
 257
 258 .SECONDARY:
 259 .PHONY: all FORCE bootstrap clean install-bin install uninstall
 260 .PHONY: doc doc-clean doc-install doc-uninstall
 261 .DEFAULT_GOAL := all