tools/bpf/bpftool/Makefile

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 include ../../scripts/Makefile.include
   3 include ../../scripts/utilities.mak
   4
   5 ifeq ($(srctree),)
   6 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
   7 srctree := $(patsubst %/,%,$(dir $(srctree)))
   8 srctree := $(patsubst %/,%,$(dir $(srctree)))
   9 endif
  10
  11 ifeq ($(V),1)
  12   Q =
  13 else
  14   Q = @
  15 endif
  16
  17 BPF_DIR = $(srctree)/tools/lib/bpf/
  18
  19 ifneq ($(OUTPUT),)
  20   LIBBPF_OUTPUT = $(OUTPUT)/libbpf/
  21   LIBBPF_PATH = $(LIBBPF_OUTPUT)
  22   BOOTSTRAP_OUTPUT = $(OUTPUT)/bootstrap/
  23 else
  24   LIBBPF_OUTPUT =
  25   LIBBPF_PATH = $(BPF_DIR)
  26   BOOTSTRAP_OUTPUT = $(CURDIR)/bootstrap/
  27 endif
  28
  29 LIBBPF = $(LIBBPF_PATH)libbpf.a
  30 LIBBPF_BOOTSTRAP_OUTPUT = $(BOOTSTRAP_OUTPUT)libbpf/
  31 LIBBPF_BOOTSTRAP = $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
  32
  33 ifeq ($(BPFTOOL_VERSION),)
  34 BPFTOOL_VERSION := $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
  35 endif
  36
  37 $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT):
  38         $(QUIET_MKDIR)mkdir -p $@
  39
  40 $(LIBBPF): FORCE | $(LIBBPF_OUTPUT)
  41         $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) $(LIBBPF_OUTPUT)libbpf.a
  42
  43 $(LIBBPF_BOOTSTRAP): FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
  44         $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \
  45                 ARCH= CC=$(HOSTCC) LD=$(HOSTLD) $@
  46
  47 $(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
  48         $(call QUIET_CLEAN, libbpf)
  49         $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
  50
  51 $(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
  52         $(call QUIET_CLEAN, libbpf-bootstrap)
  53         $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
  54
  55 prefix ?= /usr/local
  56 bash_compdir ?= /usr/share/bash-completion/completions
  57
  58 CFLAGS += -O2
  59 CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
  60 CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
  61 CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
  62         -I$(if $(OUTPUT),$(OUTPUT),.) \
  63         -I$(srctree)/kernel/bpf/ \
  64         -I$(srctree)/tools/include \
  65         -I$(srctree)/tools/include/uapi \
  66         -I$(srctree)/tools/lib \
  67         -I$(srctree)/tools/perf
  68 CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
  69 ifneq ($(EXTRA_CFLAGS),)
  70 CFLAGS += $(EXTRA_CFLAGS)
  71 endif
  72 ifneq ($(EXTRA_LDFLAGS),)
  73 LDFLAGS += $(EXTRA_LDFLAGS)
  74 endif
  75
  76 INSTALL ?= install
  77 RM ?= rm -f
  78 CLANG ?= clang
  79 LLVM_STRIP ?= llvm-strip
  80
  81 FEATURE_USER = .bpftool
  82 FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
  83         clang-bpf-co-re
  84 FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
  85         clang-bpf-co-re
  86
  87 check_feat := 1
  88 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
  89 ifdef MAKECMDGOALS
  90 ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
  91   check_feat := 0
  92 endif
  93 endif
  94
  95 ifeq ($(check_feat),1)
  96 ifeq ($(FEATURES_DUMP),)
  97 include $(srctree)/tools/build/Makefile.feature
  98 else
  99 include $(FEATURES_DUMP)
 100 endif
 101 endif
 102
 103 ifeq ($(feature-disassembler-four-args), 1)
 104 CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
 105 endif
 106
 107 ifeq ($(feature-reallocarray), 0)
 108 CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
 109 endif
 110
 111 LIBS = $(LIBBPF) -lelf -lz
 112 LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
 113 ifeq ($(feature-libcap), 1)
 114 CFLAGS += -DUSE_LIBCAP
 115 LIBS += -lcap
 116 endif
 117
 118 include $(wildcard $(OUTPUT)*.d)
 119
 120 all: $(OUTPUT)bpftool
 121
 122 BFD_SRCS = jit_disasm.c
 123
 124 SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
 125
 126 ifeq ($(feature-libbfd),1)
 127   LIBS += -lbfd -ldl -lopcodes
 128 else ifeq ($(feature-libbfd-liberty),1)
 129   LIBS += -lbfd -ldl -lopcodes -liberty
 130 else ifeq ($(feature-libbfd-liberty-z),1)
 131   LIBS += -lbfd -ldl -lopcodes -liberty -lz
 132 endif
 133
 134 ifneq ($(filter -lbfd,$(LIBS)),)
 135 CFLAGS += -DHAVE_LIBBFD_SUPPORT
 136 SRCS += $(BFD_SRCS)
 137 endif
 138
 139 BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
 140
 141 BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o)
 142 OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
 143
 144 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 145                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 146                      ../../../vmlinux                                   \
 147                      /sys/kernel/btf/vmlinux                            \
 148                      /boot/vmlinux-$(shell uname -r)
 149 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 150
 151 ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
 152 ifeq ($(feature-clang-bpf-co-re),1)
 153
 154 BUILD_BPF_SKELS := 1
 155
 156 $(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
 157 ifeq ($(VMLINUX_H),)
 158         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
 159 else
 160         $(Q)cp "$(VMLINUX_H)" $@
 161 endif
 162
 163 $(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF)
 164         $(QUIET_CLANG)$(CLANG) \
 165                 -I$(if $(OUTPUT),$(OUTPUT),.) \
 166                 -I$(srctree)/tools/include/uapi/ \
 167                 -I$(LIBBPF_PATH) \
 168                 -I$(srctree)/tools/lib \
 169                 -g -O2 -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
 170
 171 $(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
 172         $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
 173
 174 $(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
 175
 176 $(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
 177
 178 endif
 179 endif
 180
 181 CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
 182
 183 $(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 184         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
 185
 186 $(OUTPUT)feature.o: | zdep
 187
 188 $(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
 189         $(QUIET_LINK)$(HOSTCC) $(CFLAGS) $(LDFLAGS) -o $@ $(BOOTSTRAP_OBJS) \
 190                 $(LIBS_BOOTSTRAP)
 191
 192 $(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
 193         $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
 194
 195 $(BOOTSTRAP_OUTPUT)%.o: %.c | $(BOOTSTRAP_OUTPUT)
 196         $(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
 197
 198 $(OUTPUT)%.o: %.c
 199         $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
 200
 201 feature-detect-clean:
 202         $(call QUIET_CLEAN, feature-detect)
 203         $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
 204
 205 clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
 206         $(call QUIET_CLEAN, bpftool)
 207         $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
 208         $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
 209         $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
 210         $(call QUIET_CLEAN, core-gen)
 211         $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
 212         $(Q)$(RM) -r -- $(OUTPUT)feature/
 213
 214 install: $(OUTPUT)bpftool
 215         $(call QUIET_INSTALL, bpftool)
 216         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
 217         $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
 218         $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
 219         $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
 220
 221 uninstall:
 222         $(call QUIET_UNINST, bpftool)
 223         $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
 224         $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
 225
 226 doc:
 227         $(call descend,Documentation)
 228
 229 doc-clean:
 230         $(call descend,Documentation,clean)
 231
 232 doc-install:
 233         $(call descend,Documentation,install)
 234
 235 doc-uninstall:
 236         $(call descend,Documentation,uninstall)
 237
 238 FORCE:
 239
 240 zdep:
 241         @if [ "$(feature-zlib)" != "1" ]; then echo "No zlib found"; exit 1 ; fi
 242
 243 .SECONDARY:
 244 .PHONY: all FORCE clean install uninstall zdep
 245 .PHONY: doc doc-clean doc-install doc-uninstall
 246 .DEFAULT_GOAL := all