tools/bpf/bpftool/Makefile

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