linux-yocto/tools/bpf/bpftool/Makefile

SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

include ../../scripts/Makefile.include

ifeq ($(srctree),) srctree := $(patsubst %/,%,$(dir $(CURDIR))) srctree := $(patsubst %/,%,$(dir $(srctree))) srctree := $(patsubst %/,%,$(dir $(srctree))) endif

ifeq ($(V),1) Q = else Q = @ endif

BPF_DIR = $(srctree)/tools/lib/bpf

ifneq ($(OUTPUT),) _OUTPUT := $(OUTPUT) else _OUTPUT := $(CURDIR)/ endif BOOTSTRAP_OUTPUT := $(_OUTPUT)bootstrap/

LIBBPF_OUTPUT := $(_OUTPUT)libbpf/ LIBBPF_DESTDIR := $(LIBBPF_OUTPUT) LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf LIBBPF := $(LIBBPF_OUTPUT)libbpf.a

LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/ LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT) LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)include LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a

We need to copy hashmap.h, nlattr.h, relo_core.h and libbpf_internal.h

which are not otherwise exported by libbpf, but still required by bpftool.

LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h relo_core.h libbpf_internal.h) LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h relo_core.h libbpf_internal.h)

$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_HDRS_DIR): $(QUIET_MKDIR)mkdir -p $@

$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT) $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT)
DESTDIR=$(LIBBPF_DESTDIR:/=) prefix= $(LIBBPF) install_headers

$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR) $(call QUIET_INSTALL, $@) $(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<

$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT) $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT)
DESTDIR=$(LIBBPF_BOOTSTRAP_DESTDIR:/=) prefix=
ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" $@ install_headers

$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR) $(call QUIET_INSTALL, $@) $(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<

$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT) $(call QUIET_CLEAN, libbpf) $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null

$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT) $(call QUIET_CLEAN, libbpf-bootstrap) $(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null

prefix ?= /usr/local bash_compdir ?= /usr/share/bash-completion/completions

CFLAGS += -O2 CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS)) CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__
-I$(or $(OUTPUT),.)
-I$(LIBBPF_INCLUDE)
-I$(srctree)/kernel/bpf/
-I$(srctree)/tools/include
-I$(srctree)/tools/include/uapi ifneq ($(BPFTOOL_VERSION),) CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"' endif ifneq ($(EXTRA_CFLAGS),) CFLAGS += $(EXTRA_CFLAGS) endif ifneq ($(EXTRA_LDFLAGS),) LDFLAGS += $(EXTRA_LDFLAGS) endif

HOST_CFLAGS := $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),
$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS))) HOST_LDFLAGS := $(LDFLAGS)

INSTALL ?= install RM ?= rm -f

FEATURE_USER = .bpftool

FEATURE_TESTS := clang-bpf-co-re FEATURE_TESTS += llvm FEATURE_TESTS += libcap FEATURE_TESTS += libbfd FEATURE_TESTS += libbfd-liberty FEATURE_TESTS += libbfd-liberty-z FEATURE_TESTS += disassembler-four-args FEATURE_TESTS += disassembler-init-styled

FEATURE_DISPLAY := clang-bpf-co-re FEATURE_DISPLAY += llvm FEATURE_DISPLAY += libcap FEATURE_DISPLAY += libbfd FEATURE_DISPLAY += libbfd-liberty FEATURE_DISPLAY += libbfd-liberty-z

check_feat := 1 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall ifdef MAKECMDGOALS ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) check_feat := 0 endif endif

ifeq ($(check_feat),1) ifeq ($(FEATURES_DUMP),) include $(srctree)/tools/build/Makefile.feature else include $(FEATURES_DUMP) endif endif

LIBS = $(LIBBPF) -lelf -lz LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz ifeq ($(feature-libcap), 1) CFLAGS += -DUSE_LIBCAP LIBS += -lcap endif

include $(wildcard $(OUTPUT)*.d)

all: $(OUTPUT)bpftool

SRCS := $(wildcard *.c)

ifeq ($(feature-llvm),1)

If LLVM is available, use it for JIT disassembly

CFLAGS += -DHAVE_LLVM_SUPPORT LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets CFLAGS += $(shell $(LLVM_CONFIG) --cflags) LIBS += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS)) ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static) LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS)) LIBS += -lstdc++ endif LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags) else

Fall back on libbfd

ifeq ($(feature-libbfd),1) LIBS += -lbfd -ldl -lopcodes else ifeq ($(feature-libbfd-liberty),1) LIBS += -lbfd -ldl -lopcodes -liberty else ifeq ($(feature-libbfd-liberty-z),1) LIBS += -lbfd -ldl -lopcodes -liberty -lz endif

If one of the above feature combinations is set, we support libbfd

ifneq ($(filter -lbfd,$(LIBS)),) CFLAGS += -DHAVE_LIBBFD_SUPPORT

# Libbfd interface changed over time, figure out what we need
ifeq ($(feature-disassembler-four-args), 1)
  CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
endif
ifeq ($(feature-disassembler-init-styled), 1)
  CFLAGS += -DDISASM_INIT_STYLED
endif

endif endif ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)

No support for JIT disassembly

SRCS := $(filter-out jit_disasm.c,$(SRCS)) endif

BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool

BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o) $(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)

OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o $(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)

VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)
$(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)
../../../vmlinux
/sys/kernel/btf/vmlinux
/boot/vmlinux-$(shell uname -r) VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))

bootstrap: $(BPFTOOL_BOOTSTRAP)

ifneq ($(VMLINUX_BTF)$(VMLINUX_H),) ifeq ($(feature-clang-bpf-co-re),1)

BUILD_BPF_SKELS := 1

ifeq ($(VMLINUX_H),) $(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP) $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@ else $(OUTPUT)vmlinux.h: $(VMLINUX_H) $(Q)cp "$(VMLINUX_H)" $@ endif

$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP) $(QUIET_CLANG)$(CLANG)
-I$(or $(OUTPUT),.)
-I$(srctree)/tools/include/uapi/
-I$(LIBBPF_BOOTSTRAP_INCLUDE)
-g -O2 -Wall -fno-stack-protector
--target=bpf -c $< -o $@ $(Q)$(LLVM_STRIP) -g $@

$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP) $(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@

$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h

$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h

endif endif

CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)

$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@

$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP) $(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@

$(OUTPUT)bpftool: $(OBJS) $(LIBBPF) $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@

$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT) $(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@

$(OUTPUT)%.o: %.c $(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@

feature-detect-clean: $(call QUIET_CLEAN, feature-detect) $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null

clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean $(call QUIET_CLEAN, bpftool) $(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT).o $(OUTPUT).d $(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h $(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(call QUIET_CLEAN, core-gen) $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool $(Q)$(RM) -r -- $(OUTPUT)feature/

install-bin: $(OUTPUT)bpftool $(call QUIET_INSTALL, bpftool) $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin $(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool

install: install-bin $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir) $(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)

uninstall: $(call QUIET_UNINST, bpftool) $(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool $(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool

doc: $(call descend,Documentation)

doc-clean: $(call descend,Documentation,clean)

doc-install: $(call descend,Documentation,install)

doc-uninstall: $(call descend,Documentation,uninstall)

FORCE:

.SECONDARY: .PHONY: all FORCE bootstrap clean install-bin install uninstall .PHONY: doc doc-clean doc-install doc-uninstall .DEFAULT_GOAL := all

Delete partially updated (corrupted) files on error

.DELETE_ON_ERROR: