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