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) $@ 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 += $(EXTRA_LDFLAGS)
  90 endif
  91
  92 INSTALL ?= install
  93 RM ?= rm -f
  94
  95 FEATURE_USER = .bpftool
  96 FEATURE_TESTS = libbfd disassembler-four-args zlib libcap \
  97         clang-bpf-co-re
  98 FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
  99         clang-bpf-co-re
 100
 101 check_feat := 1
 102 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
 103 ifdef MAKECMDGOALS
 104 ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
 105   check_feat := 0
 106 endif
 107 endif
 108
 109 ifeq ($(check_feat),1)
 110 ifeq ($(FEATURES_DUMP),)
 111 include $(srctree)/tools/build/Makefile.feature
 112 else
 113 include $(FEATURES_DUMP)
 114 endif
 115 endif
 116
 117 ifeq ($(feature-disassembler-four-args), 1)
 118 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
 119 endif
 120
 121 LIBS = $(LIBBPF) -lelf -lz
 122 LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
 123 ifeq ($(feature-libcap), 1)
 124 CFLAGS += -DUSE_LIBCAP
 125 LIBS += -lcap
 126 endif
 127
 128 include $(wildcard $(OUTPUT)*.d)
 129
 130 all: $(OUTPUT)bpftool
 131
 132 BFD_SRCS = jit_disasm.c
 133
 134 SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
 135
 136 ifeq ($(feature-libbfd),1)
 137   LIBS += -lbfd -ldl -lopcodes
 138 else ifeq ($(feature-libbfd-liberty),1)
 139   LIBS += -lbfd -ldl -lopcodes -liberty
 140 else ifeq ($(feature-libbfd-liberty-z),1)
 141   LIBS += -lbfd -ldl -lopcodes -liberty -lz
 142 endif
 143
 144 ifneq ($(filter -lbfd,$(LIBS)),)
 145 CFLAGS += -DHAVE_LIBBFD_SUPPORT
 146 SRCS += $(BFD_SRCS)
 147 endif
 148
 149 HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
 150                 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
 151
 152 BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
 153
 154 BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
 155 $(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
 156
 157 OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
 158 $(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
 159
 160 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 161                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 162                      ../../../vmlinux                                   \
 163                      /sys/kernel/btf/vmlinux                            \
 164                      /boot/vmlinux-$(shell uname -r)
 165 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 166
 167 bootstrap: $(BPFTOOL_BOOTSTRAP)
 168
 169 ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
 170 ifeq ($(feature-clang-bpf-co-re),1)
 171
 172 BUILD_BPF_SKELS := 1
 173
 174 $(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
 175 ifeq ($(VMLINUX_H),)
 176         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
 177 else
 178         $(Q)cp "$(VMLINUX_H)" $@
 179 endif
 180
 181 $(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
 182         $(QUIET_CLANG)$(CLANG) \
 183                 -I$(or $(OUTPUT),.) \
 184                 -I$(srctree)/tools/include/uapi/ \
 185                 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \
 186                 -g -O2 -Wall -target bpf -c $< -o $@
 187         $(Q)$(LLVM_STRIP) -g $@
 188
 189 $(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
 190         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
 191
 192 $(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
 193
 194 $(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
 195
 196 endif
 197 endif
 198
 199 CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
 200
 201 $(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 202         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 203
 204 $(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 205         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 206
 207 $(OUTPUT)feature.o:
 208 ifneq ($(feature-zlib), 1)
 209         $(error "No zlib found")
 210 endif
 211
 212 $(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
 213         $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
 214
 215 $(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
 216         $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
 217
 218 $(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
 219         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 220
 221 $(OUTPUT)%.o: %.c
 222         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 223
 224 feature-detect-clean:
 225         $(call QUIET_CLEAN, feature-detect)
 226         $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
 227
 228 clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
 229         $(call QUIET_CLEAN, bpftool)
 230         $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
 231         $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
 232         $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
 233         $(call QUIET_CLEAN, core-gen)
 234         $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
 235         $(Q)$(RM) -r -- $(OUTPUT)feature/
 236
 237 install-bin: $(OUTPUT)bpftool
 238         $(call QUIET_INSTALL, bpftool)
 239         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
 240         $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
 241
 242 install: install-bin
 243         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
 244         $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
 245
 246 uninstall:
 247         $(call QUIET_UNINST, bpftool)
 248         $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
 249         $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
 250
 251 doc:
 252         $(call descend,Documentation)
 253
 254 doc-clean:
 255         $(call descend,Documentation,clean)
 256
 257 doc-install:
 258         $(call descend,Documentation,install)
 259
 260 doc-uninstall:
 261         $(call descend,Documentation,uninstall)
 262
 263 FORCE:
 264
 265 .SECONDARY:
 266 .PHONY: all FORCE bootstrap clean install-bin install uninstall
 267 .PHONY: doc doc-clean doc-install doc-uninstall
 268 .DEFAULT_GOAL := all