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 += $(EXTRA_LDFLAGS)
  90 endif
  91
  92 INSTALL ?= install
  93 RM ?= rm -f
  94
  95 FEATURE_USER = .bpftool
  96 FEATURE_TESTS = libbfd libbfd-liberty libbfd-liberty-z \
  97         disassembler-four-args disassembler-init-styled libcap \
  98         clang-bpf-co-re
  99 FEATURE_DISPLAY = libbfd libbfd-liberty libbfd-liberty-z \
 100         libcap clang-bpf-co-re
 101
 102 check_feat := 1
 103 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
 104 ifdef MAKECMDGOALS
 105 ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
 106   check_feat := 0
 107 endif
 108 endif
 109
 110 ifeq ($(check_feat),1)
 111 ifeq ($(FEATURES_DUMP),)
 112 include $(srctree)/tools/build/Makefile.feature
 113 else
 114 include $(FEATURES_DUMP)
 115 endif
 116 endif
 117
 118 ifeq ($(feature-disassembler-four-args), 1)
 119 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
 120 endif
 121 ifeq ($(feature-disassembler-init-styled), 1)
 122     CFLAGS += -DDISASM_INIT_STYLED
 123 endif
 124
 125 LIBS = $(LIBBPF) -lelf -lz
 126 LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
 127 ifeq ($(feature-libcap), 1)
 128 CFLAGS += -DUSE_LIBCAP
 129 LIBS += -lcap
 130 endif
 131
 132 include $(wildcard $(OUTPUT)*.d)
 133
 134 all: $(OUTPUT)bpftool
 135
 136 BFD_SRCS = jit_disasm.c
 137
 138 SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
 139
 140 ifeq ($(feature-libbfd),1)
 141   LIBS += -lbfd -ldl -lopcodes
 142 else ifeq ($(feature-libbfd-liberty),1)
 143   LIBS += -lbfd -ldl -lopcodes -liberty
 144 else ifeq ($(feature-libbfd-liberty-z),1)
 145   LIBS += -lbfd -ldl -lopcodes -liberty -lz
 146 endif
 147
 148 ifneq ($(filter -lbfd,$(LIBS)),)
 149 CFLAGS += -DHAVE_LIBBFD_SUPPORT
 150 SRCS += $(BFD_SRCS)
 151 endif
 152
 153 HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
 154                 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
 155
 156 BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
 157
 158 BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
 159 $(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
 160
 161 OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
 162 $(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
 163
 164 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 165                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 166                      ../../../vmlinux                                   \
 167                      /sys/kernel/btf/vmlinux                            \
 168                      /boot/vmlinux-$(shell uname -r)
 169 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 170
 171 bootstrap: $(BPFTOOL_BOOTSTRAP)
 172
 173 ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
 174 ifeq ($(feature-clang-bpf-co-re),1)
 175
 176 BUILD_BPF_SKELS := 1
 177
 178 $(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
 179 ifeq ($(VMLINUX_H),)
 180         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
 181 else
 182         $(Q)cp "$(VMLINUX_H)" $@
 183 endif
 184
 185 $(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
 186         $(QUIET_CLANG)$(CLANG) \
 187                 -I$(or $(OUTPUT),.) \
 188                 -I$(srctree)/tools/include/uapi/ \
 189                 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \
 190                 -g -O2 -Wall -target bpf -c $< -o $@
 191         $(Q)$(LLVM_STRIP) -g $@
 192
 193 $(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
 194         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
 195
 196 $(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
 197
 198 $(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
 199
 200 endif
 201 endif
 202
 203 CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
 204
 205 $(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 206         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 207
 208 $(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 209         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 210
 211 $(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
 212         $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
 213
 214 $(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
 215         $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
 216
 217 $(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
 218         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 219
 220 $(OUTPUT)%.o: %.c
 221         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 222
 223 feature-detect-clean:
 224         $(call QUIET_CLEAN, feature-detect)
 225         $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
 226
 227 clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
 228         $(call QUIET_CLEAN, bpftool)
 229         $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
 230         $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
 231         $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
 232         $(call QUIET_CLEAN, core-gen)
 233         $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
 234         $(Q)$(RM) -r -- $(OUTPUT)feature/
 235
 236 install-bin: $(OUTPUT)bpftool
 237         $(call QUIET_INSTALL, bpftool)
 238         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
 239         $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
 240
 241 install: install-bin
 242         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
 243         $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
 244
 245 uninstall:
 246         $(call QUIET_UNINST, bpftool)
 247         $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
 248         $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
 249
 250 doc:
 251         $(call descend,Documentation)
 252
 253 doc-clean:
 254         $(call descend,Documentation,clean)
 255
 256 doc-install:
 257         $(call descend,Documentation,install)
 258
 259 doc-uninstall:
 260         $(call descend,Documentation,uninstall)
 261
 262 FORCE:
 263
 264 .SECONDARY:
 265 .PHONY: all FORCE bootstrap clean install-bin install uninstall
 266 .PHONY: doc doc-clean doc-install doc-uninstall
 267 .DEFAULT_GOAL := all