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 += $(EXTRA_LDFLAGS)
  90 endif
  91
  92 INSTALL ?= install
  93 RM ?= rm -f
  94
  95 FEATURE_USER = .bpftool
  96
  97 FEATURE_TESTS := clang-bpf-co-re
  98 FEATURE_TESTS += llvm
  99 FEATURE_TESTS += libcap
 100 FEATURE_TESTS += libbfd
 101 FEATURE_TESTS += libbfd-liberty
 102 FEATURE_TESTS += libbfd-liberty-z
 103 FEATURE_TESTS += disassembler-four-args
 104 FEATURE_TESTS += disassembler-init-styled
 105
 106 FEATURE_DISPLAY := clang-bpf-co-re
 107 FEATURE_DISPLAY += llvm
 108 FEATURE_DISPLAY += libcap
 109 FEATURE_DISPLAY += libbfd
 110 FEATURE_DISPLAY += libbfd-liberty
 111 FEATURE_DISPLAY += libbfd-liberty-z
 112
 113 check_feat := 1
 114 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
 115 ifdef MAKECMDGOALS
 116 ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
 117   check_feat := 0
 118 endif
 119 endif
 120
 121 ifeq ($(check_feat),1)
 122 ifeq ($(FEATURES_DUMP),)
 123 include $(srctree)/tools/build/Makefile.feature
 124 else
 125 include $(FEATURES_DUMP)
 126 endif
 127 endif
 128
 129 LIBS = $(LIBBPF) -lelf -lz
 130 LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
 131 ifeq ($(feature-libcap), 1)
 132 CFLAGS += -DUSE_LIBCAP
 133 LIBS += -lcap
 134 endif
 135
 136 include $(wildcard $(OUTPUT)*.d)
 137
 138 all: $(OUTPUT)bpftool
 139
 140 SRCS := $(wildcard *.c)
 141
 142 ifeq ($(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 $(LLVM_CONFIG_LIB_COMPONENTS))
 148   ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static)
 149     LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS))
 150     LIBS += -lstdc++
 151   endif
 152   LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags)
 153 else
 154   # Fall back on libbfd
 155   ifeq ($(feature-libbfd),1)
 156     LIBS += -lbfd -ldl -lopcodes
 157   else ifeq ($(feature-libbfd-liberty),1)
 158     LIBS += -lbfd -ldl -lopcodes -liberty
 159   else ifeq ($(feature-libbfd-liberty-z),1)
 160     LIBS += -lbfd -ldl -lopcodes -liberty -lz
 161   endif
 162
 163   # If one of the above feature combinations is set, we support libbfd
 164   ifneq ($(filter -lbfd,$(LIBS)),)
 165     CFLAGS += -DHAVE_LIBBFD_SUPPORT
 166
 167     # Libbfd interface changed over time, figure out what we need
 168     ifeq ($(feature-disassembler-four-args), 1)
 169       CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
 170     endif
 171     ifeq ($(feature-disassembler-init-styled), 1)
 172       CFLAGS += -DDISASM_INIT_STYLED
 173     endif
 174   endif
 175 endif
 176 ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)
 177   # No support for JIT disassembly
 178   SRCS := $(filter-out jit_disasm.c,$(SRCS))
 179 endif
 180
 181 HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
 182                 $(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
 183
 184 BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
 185
 186 BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
 187 $(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
 188
 189 OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
 190 $(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
 191
 192 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 193                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 194                      ../../../vmlinux                                   \
 195                      /sys/kernel/btf/vmlinux                            \
 196                      /boot/vmlinux-$(shell uname -r)
 197 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 198
 199 bootstrap: $(BPFTOOL_BOOTSTRAP)
 200
 201 ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
 202 ifeq ($(feature-clang-bpf-co-re),1)
 203
 204 BUILD_BPF_SKELS := 1
 205
 206 $(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
 207 ifeq ($(VMLINUX_H),)
 208         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
 209 else
 210         $(Q)cp "$(VMLINUX_H)" $@
 211 endif
 212
 213 $(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
 214         $(QUIET_CLANG)$(CLANG) \
 215                 -I$(or $(OUTPUT),.) \
 216                 -I$(srctree)/tools/include/uapi/ \
 217                 -I$(LIBBPF_BOOTSTRAP_INCLUDE) \
 218                 -g -O2 -Wall -fno-stack-protector \
 219                 --target=bpf -c $< -o $@
 220         $(Q)$(LLVM_STRIP) -g $@
 221
 222 $(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
 223         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
 224
 225 $(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
 226
 227 $(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
 228
 229 endif
 230 endif
 231
 232 CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
 233
 234 $(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 235         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 236
 237 $(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 238         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 239
 240 $(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
 241         $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
 242
 243 $(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
 244         $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
 245
 246 $(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
 247         $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
 248
 249 $(OUTPUT)%.o: %.c
 250         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
 251
 252 feature-detect-clean:
 253         $(call QUIET_CLEAN, feature-detect)
 254         $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
 255
 256 clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
 257         $(call QUIET_CLEAN, bpftool)
 258         $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
 259         $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
 260         $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
 261         $(call QUIET_CLEAN, core-gen)
 262         $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
 263         $(Q)$(RM) -r -- $(OUTPUT)feature/
 264
 265 install-bin: $(OUTPUT)bpftool
 266         $(call QUIET_INSTALL, bpftool)
 267         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
 268         $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
 269
 270 install: install-bin
 271         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
 272         $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
 273
 274 uninstall:
 275         $(call QUIET_UNINST, bpftool)
 276         $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
 277         $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
 278
 279 doc:
 280         $(call descend,Documentation)
 281
 282 doc-clean:
 283         $(call descend,Documentation,clean)
 284
 285 doc-install:
 286         $(call descend,Documentation,install)
 287
 288 doc-uninstall:
 289         $(call descend,Documentation,uninstall)
 290
 291 FORCE:
 292
 293 .SECONDARY:
 294 .PHONY: all FORCE bootstrap clean install-bin install uninstall
 295 .PHONY: doc doc-clean doc-install doc-uninstall
 296 .DEFAULT_GOAL := all
 297
 298 # Delete partially updated (corrupted) files on error
 299 .DELETE_ON_ERROR: