mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 01:54:09 +08:00
878625e1c7
When the clang toolchain has stack protection enabled in order to be
consistent with gcc - which just happens to be the case on Gentoo -
the bpftool build fails:
[...]
clang \
-I. \
-I/tmp/portage/dev-util/bpftool-6.0.12/work/linux-6.0/tools/include/uapi/ \
-I/tmp/portage/dev-util/bpftool-6.0.12/work/linux-6.0/tools/bpf/bpftool/bootstrap/libbpf/include \
-g -O2 -Wall -target bpf -c skeleton/pid_iter.bpf.c -o pid_iter.bpf.o
clang \
-I. \
-I/tmp/portage/dev-util/bpftool-6.0.12/work/linux-6.0/tools/include/uapi/ \
-I/tmp/portage/dev-util/bpftool-6.0.12/work/linux-6.0/tools/bpf/bpftool/bootstrap/libbpf/include \
-g -O2 -Wall -target bpf -c skeleton/profiler.bpf.c -o profiler.bpf.o
skeleton/profiler.bpf.c:40:14: error: A call to built-in function '__stack_chk_fail' is not supported.
int BPF_PROG(fentry_XXX)
^
skeleton/profiler.bpf.c:94:14: error: A call to built-in function '__stack_chk_fail' is not supported.
int BPF_PROG(fexit_XXX)
^
2 errors generated.
[...]
Since stack-protector makes no sense for the BPF bits just unconditionally
disable it.
Bug: https://bugs.gentoo.org/890638
Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/74cd9d2e-6052-312a-241e-2b514a75c92c@applied-asynchrony.com
300 lines
9.2 KiB
Makefile
300 lines
9.2 KiB
Makefile
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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include ../../scripts/Makefile.include
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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endif
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ifeq ($(V),1)
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Q =
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else
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Q = @
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endif
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BPF_DIR = $(srctree)/tools/lib/bpf
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ifneq ($(OUTPUT),)
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_OUTPUT := $(OUTPUT)
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else
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_OUTPUT := $(CURDIR)/
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endif
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BOOTSTRAP_OUTPUT := $(_OUTPUT)bootstrap/
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LIBBPF_OUTPUT := $(_OUTPUT)libbpf/
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LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
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LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
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LIBBPF_HDRS_DIR := $(LIBBPF_INCLUDE)/bpf
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LIBBPF := $(LIBBPF_OUTPUT)libbpf.a
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LIBBPF_BOOTSTRAP_OUTPUT := $(BOOTSTRAP_OUTPUT)libbpf/
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LIBBPF_BOOTSTRAP_DESTDIR := $(LIBBPF_BOOTSTRAP_OUTPUT)
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LIBBPF_BOOTSTRAP_INCLUDE := $(LIBBPF_BOOTSTRAP_DESTDIR)include
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LIBBPF_BOOTSTRAP_HDRS_DIR := $(LIBBPF_BOOTSTRAP_INCLUDE)/bpf
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LIBBPF_BOOTSTRAP := $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
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# We need to copy hashmap.h, nlattr.h, relo_core.h and libbpf_internal.h
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# which are not otherwise exported by libbpf, but still required by bpftool.
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LIBBPF_INTERNAL_HDRS := $(addprefix $(LIBBPF_HDRS_DIR)/,hashmap.h nlattr.h relo_core.h libbpf_internal.h)
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LIBBPF_BOOTSTRAP_INTERNAL_HDRS := $(addprefix $(LIBBPF_BOOTSTRAP_HDRS_DIR)/,hashmap.h relo_core.h libbpf_internal.h)
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$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT) $(LIBBPF_HDRS_DIR) $(LIBBPF_BOOTSTRAP_HDRS_DIR):
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$(QUIET_MKDIR)mkdir -p $@
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$(LIBBPF): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_OUTPUT)
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$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) \
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DESTDIR=$(LIBBPF_DESTDIR:/=) prefix= $(LIBBPF) install_headers
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$(LIBBPF_INTERNAL_HDRS): $(LIBBPF_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_HDRS_DIR)
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$(call QUIET_INSTALL, $@)
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$(Q)install -m 644 -t $(LIBBPF_HDRS_DIR) $<
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$(LIBBPF_BOOTSTRAP): $(wildcard $(BPF_DIR)/*.[ch] $(BPF_DIR)/Makefile) | $(LIBBPF_BOOTSTRAP_OUTPUT)
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$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \
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DESTDIR=$(LIBBPF_BOOTSTRAP_DESTDIR:/=) prefix= \
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ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" $@ install_headers
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$(LIBBPF_BOOTSTRAP_INTERNAL_HDRS): $(LIBBPF_BOOTSTRAP_HDRS_DIR)/%.h: $(BPF_DIR)/%.h | $(LIBBPF_BOOTSTRAP_HDRS_DIR)
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$(call QUIET_INSTALL, $@)
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$(Q)install -m 644 -t $(LIBBPF_BOOTSTRAP_HDRS_DIR) $<
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$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
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$(call QUIET_CLEAN, libbpf)
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$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
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$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
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$(call QUIET_CLEAN, libbpf-bootstrap)
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$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
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prefix ?= /usr/local
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bash_compdir ?= /usr/share/bash-completion/completions
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CFLAGS += -O2
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CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
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CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
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CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
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-I$(or $(OUTPUT),.) \
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-I$(LIBBPF_INCLUDE) \
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-I$(srctree)/kernel/bpf/ \
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-I$(srctree)/tools/include \
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-I$(srctree)/tools/include/uapi
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ifneq ($(BPFTOOL_VERSION),)
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CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
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endif
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ifneq ($(EXTRA_CFLAGS),)
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CFLAGS += $(EXTRA_CFLAGS)
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endif
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ifneq ($(EXTRA_LDFLAGS),)
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LDFLAGS += $(EXTRA_LDFLAGS)
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endif
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INSTALL ?= install
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RM ?= rm -f
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FEATURE_USER = .bpftool
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FEATURE_TESTS := clang-bpf-co-re
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FEATURE_TESTS += llvm
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FEATURE_TESTS += libcap
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FEATURE_TESTS += libbfd
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FEATURE_TESTS += libbfd-liberty
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FEATURE_TESTS += libbfd-liberty-z
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FEATURE_TESTS += disassembler-four-args
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FEATURE_TESTS += disassembler-init-styled
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FEATURE_DISPLAY := clang-bpf-co-re
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FEATURE_DISPLAY += llvm
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FEATURE_DISPLAY += libcap
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FEATURE_DISPLAY += libbfd
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FEATURE_DISPLAY += libbfd-liberty
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FEATURE_DISPLAY += libbfd-liberty-z
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check_feat := 1
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NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
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ifdef MAKECMDGOALS
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ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
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check_feat := 0
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endif
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endif
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ifeq ($(check_feat),1)
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ifeq ($(FEATURES_DUMP),)
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include $(srctree)/tools/build/Makefile.feature
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else
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include $(FEATURES_DUMP)
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endif
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endif
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LIBS = $(LIBBPF) -lelf -lz
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LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
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ifeq ($(feature-libcap), 1)
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CFLAGS += -DUSE_LIBCAP
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LIBS += -lcap
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endif
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include $(wildcard $(OUTPUT)*.d)
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all: $(OUTPUT)bpftool
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SRCS := $(wildcard *.c)
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ifeq ($(feature-llvm),1)
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# If LLVM is available, use it for JIT disassembly
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CFLAGS += -DHAVE_LLVM_SUPPORT
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LLVM_CONFIG_LIB_COMPONENTS := mcdisassembler all-targets
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CFLAGS += $(shell $(LLVM_CONFIG) --cflags --libs $(LLVM_CONFIG_LIB_COMPONENTS))
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LIBS += $(shell $(LLVM_CONFIG) --libs $(LLVM_CONFIG_LIB_COMPONENTS))
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ifeq ($(shell $(LLVM_CONFIG) --shared-mode),static)
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LIBS += $(shell $(LLVM_CONFIG) --system-libs $(LLVM_CONFIG_LIB_COMPONENTS))
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LIBS += -lstdc++
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endif
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LDFLAGS += $(shell $(LLVM_CONFIG) --ldflags)
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else
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# Fall back on libbfd
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ifeq ($(feature-libbfd),1)
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LIBS += -lbfd -ldl -lopcodes
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else ifeq ($(feature-libbfd-liberty),1)
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LIBS += -lbfd -ldl -lopcodes -liberty
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else ifeq ($(feature-libbfd-liberty-z),1)
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LIBS += -lbfd -ldl -lopcodes -liberty -lz
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endif
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# If one of the above feature combinations is set, we support libbfd
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ifneq ($(filter -lbfd,$(LIBS)),)
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CFLAGS += -DHAVE_LIBBFD_SUPPORT
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# Libbfd interface changed over time, figure out what we need
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ifeq ($(feature-disassembler-four-args), 1)
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CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
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endif
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ifeq ($(feature-disassembler-init-styled), 1)
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CFLAGS += -DDISASM_INIT_STYLED
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endif
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endif
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endif
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ifeq ($(filter -DHAVE_LLVM_SUPPORT -DHAVE_LIBBFD_SUPPORT,$(CFLAGS)),)
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# No support for JIT disassembly
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SRCS := $(filter-out jit_disasm.c,$(SRCS))
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endif
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HOST_CFLAGS = $(subst -I$(LIBBPF_INCLUDE),-I$(LIBBPF_BOOTSTRAP_INCLUDE),\
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$(subst $(CLANG_CROSS_FLAGS),,$(CFLAGS)))
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BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
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BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
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$(BOOTSTRAP_OBJS): $(LIBBPF_BOOTSTRAP)
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OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
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$(OBJS): $(LIBBPF) $(LIBBPF_INTERNAL_HDRS)
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VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \
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$(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \
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../../../vmlinux \
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/sys/kernel/btf/vmlinux \
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/boot/vmlinux-$(shell uname -r)
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VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
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bootstrap: $(BPFTOOL_BOOTSTRAP)
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ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
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ifeq ($(feature-clang-bpf-co-re),1)
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BUILD_BPF_SKELS := 1
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$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
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ifeq ($(VMLINUX_H),)
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$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
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else
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$(Q)cp "$(VMLINUX_H)" $@
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endif
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$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF_BOOTSTRAP)
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$(QUIET_CLANG)$(CLANG) \
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-I$(or $(OUTPUT),.) \
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-I$(srctree)/tools/include/uapi/ \
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-I$(LIBBPF_BOOTSTRAP_INCLUDE) \
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-g -O2 -Wall -fno-stack-protector \
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-target bpf -c $< -o $@
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$(Q)$(LLVM_STRIP) -g $@
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$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
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$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
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$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
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$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
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endif
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endif
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CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
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$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
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$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
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$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
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$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
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$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
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$(QUIET_LINK)$(HOSTCC) $(HOST_CFLAGS) $(LDFLAGS) $(BOOTSTRAP_OBJS) $(LIBS_BOOTSTRAP) -o $@
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$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
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$(BOOTSTRAP_OUTPUT)%.o: %.c $(LIBBPF_BOOTSTRAP_INTERNAL_HDRS) | $(BOOTSTRAP_OUTPUT)
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$(QUIET_CC)$(HOSTCC) $(HOST_CFLAGS) -c -MMD $< -o $@
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$(OUTPUT)%.o: %.c
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$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD $< -o $@
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feature-detect-clean:
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$(call QUIET_CLEAN, feature-detect)
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$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
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clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
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$(call QUIET_CLEAN, bpftool)
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$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
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$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
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$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
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$(call QUIET_CLEAN, core-gen)
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$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
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$(Q)$(RM) -r -- $(OUTPUT)feature/
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install-bin: $(OUTPUT)bpftool
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$(call QUIET_INSTALL, bpftool)
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$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
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$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
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install: install-bin
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$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
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$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
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uninstall:
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$(call QUIET_UNINST, bpftool)
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$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
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$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
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doc:
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$(call descend,Documentation)
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doc-clean:
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$(call descend,Documentation,clean)
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doc-install:
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$(call descend,Documentation,install)
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doc-uninstall:
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$(call descend,Documentation,uninstall)
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FORCE:
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.SECONDARY:
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.PHONY: all FORCE bootstrap clean install-bin install uninstall
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.PHONY: doc doc-clean doc-install doc-uninstall
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.DEFAULT_GOAL := all
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# Delete partially updated (corrupted) files on error
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.DELETE_ON_ERROR:
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