232 lines
7.9 KiB
Makefile
232 lines
7.9 KiB
Makefile
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# SPDX-License-Identifier: GPL-2.0
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# based on tools/testing/selftest/bpf/Makefile
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include ../../../build/Build.include
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include ../../../scripts/Makefile.arch
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include ../../../scripts/Makefile.include
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CXX ?= $(CROSS_COMPILE)g++
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HOSTPKG_CONFIG := pkg-config
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CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(KHDR_INCLUDES) -I$(OUTPUT)
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LDLIBS += -lelf -lz -lrt -lpthread
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# Silence some warnings when compiled with clang
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ifneq ($(LLVM),)
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CFLAGS += -Wno-unused-command-line-argument
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endif
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# Order correspond to 'make run_tests' order
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TEST_GEN_PROGS = hid_bpf
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# Emit succinct information message describing current building step
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# $1 - generic step name (e.g., CC, LINK, etc);
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# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
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# $3 - target (assumed to be file); only file name will be emitted;
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# $4 - optional extra arg, emitted as-is, if provided.
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ifeq ($(V),1)
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Q =
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msg =
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else
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Q = @
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msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
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MAKEFLAGS += --no-print-directory
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submake_extras := feature_display=0
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endif
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# override lib.mk's default rules
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OVERRIDE_TARGETS := 1
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override define CLEAN
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$(call msg,CLEAN)
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$(Q)$(RM) -r $(TEST_GEN_PROGS)
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$(Q)$(RM) -r $(EXTRA_CLEAN)
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endef
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include ../lib.mk
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TOOLSDIR := $(top_srcdir)/tools
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LIBDIR := $(TOOLSDIR)/lib
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BPFDIR := $(LIBDIR)/bpf
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TOOLSINCDIR := $(TOOLSDIR)/include
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BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
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SCRATCH_DIR := $(OUTPUT)/tools
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BUILD_DIR := $(SCRATCH_DIR)/build
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INCLUDE_DIR := $(SCRATCH_DIR)/include
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KHDR_INCLUDES := $(SCRATCH_DIR)/uapi/include
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BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
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ifneq ($(CROSS_COMPILE),)
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HOST_BUILD_DIR := $(BUILD_DIR)/host
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HOST_SCRATCH_DIR := $(OUTPUT)/host-tools
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HOST_INCLUDE_DIR := $(HOST_SCRATCH_DIR)/include
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else
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HOST_BUILD_DIR := $(BUILD_DIR)
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HOST_SCRATCH_DIR := $(SCRATCH_DIR)
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HOST_INCLUDE_DIR := $(INCLUDE_DIR)
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endif
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HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
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RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
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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 $(VMLINUX_BTF_PATHS))))
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ifeq ($(VMLINUX_BTF),)
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$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
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endif
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# Define simple and short `make test_progs`, `make test_sysctl`, etc targets
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# to build individual tests.
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# NOTE: Semicolon at the end is critical to override lib.mk's default static
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# rule for binaries.
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$(notdir $(TEST_GEN_PROGS)): %: $(OUTPUT)/% ;
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# sort removes libbpf duplicates when not cross-building
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MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf \
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$(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids \
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$(INCLUDE_DIR))
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$(MAKE_DIRS):
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$(call msg,MKDIR,,$@)
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$(Q)mkdir -p $@
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# LLVM's ld.lld doesn't support all the architectures, so use it only on x86
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ifeq ($(SRCARCH),x86)
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LLD := lld
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else
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LLD := ld
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endif
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DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
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TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL)
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$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ)
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BPFTOOL ?= $(DEFAULT_BPFTOOL)
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$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \
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$(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
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$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
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ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \
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EXTRA_CFLAGS='-g -O0' \
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OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \
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LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \
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LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/ \
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prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin
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$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
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| $(BUILD_DIR)/libbpf
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$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
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EXTRA_CFLAGS='-g -O0' \
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DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
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ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
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$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
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| $(HOST_BUILD_DIR)/libbpf
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$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \
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EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE= \
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OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \
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DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
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endif
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$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
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ifeq ($(VMLINUX_H),)
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$(call msg,GEN,,$@)
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$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
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else
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$(call msg,CP,,$@)
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$(Q)cp "$(VMLINUX_H)" $@
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endif
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$(KHDR_INCLUDES)/linux/hid.h: $(top_srcdir)/include/uapi/linux/hid.h
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$(MAKE) -C $(top_srcdir) INSTALL_HDR_PATH=$(SCRATCH_DIR)/uapi headers_install
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$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \
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$(TOOLSDIR)/bpf/resolve_btfids/main.c \
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$(TOOLSDIR)/lib/rbtree.c \
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$(TOOLSDIR)/lib/zalloc.c \
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$(TOOLSDIR)/lib/string.c \
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$(TOOLSDIR)/lib/ctype.c \
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$(TOOLSDIR)/lib/str_error_r.c
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$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \
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CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \
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LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \
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OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
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# Get Clang's default includes on this system, as opposed to those seen by
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# '-target bpf'. This fixes "missing" files on some architectures/distros,
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# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
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#
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# Use '-idirafter': Don't interfere with include mechanics except where the
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# build would have failed anyways.
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define get_sys_includes
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$(shell $(1) -v -E - </dev/null 2>&1 \
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| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
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$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
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endef
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# Determine target endianness.
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IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
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grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
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MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
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CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
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BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \
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-I$(INCLUDE_DIR)
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CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
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-Wno-compare-distinct-pointer-types
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# Build BPF object using Clang
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# $1 - input .c file
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# $2 - output .o file
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# $3 - CFLAGS
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define CLANG_BPF_BUILD_RULE
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$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
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$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v3 -o $2
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endef
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# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
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define CLANG_NOALU32_BPF_BUILD_RULE
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$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
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$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v2 -o $2
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endef
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# Build BPF object using GCC
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define GCC_BPF_BUILD_RULE
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$(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
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$(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
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endef
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BPF_PROGS_DIR := progs
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BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
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BPF_SRCS := $(notdir $(wildcard $(BPF_PROGS_DIR)/*.c))
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BPF_OBJS := $(patsubst %.c,$(OUTPUT)/%.bpf.o, $(BPF_SRCS))
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BPF_SKELS := $(patsubst %.c,$(OUTPUT)/%.skel.h, $(BPF_SRCS))
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TEST_GEN_FILES += $(BPF_OBJS)
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$(BPF_PROGS_DIR)-bpfobjs := y
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$(BPF_OBJS): $(OUTPUT)/%.bpf.o: \
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$(BPF_PROGS_DIR)/%.c \
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$(wildcard $(BPF_PROGS_DIR)/*.h) \
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$(INCLUDE_DIR)/vmlinux.h \
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$(wildcard $(BPFDIR)/hid_bpf_*.h) \
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$(wildcard $(BPFDIR)/*.bpf.h) \
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| $(OUTPUT) $(BPFOBJ)
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$(call $(BPF_BUILD_RULE),$<,$@, $(BPF_CFLAGS))
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$(BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(OUTPUT)
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$(call msg,GEN-SKEL,$(BINARY),$@)
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$(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $<
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$(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked1.o) name $(notdir $(<:.bpf.o=)) > $@
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$(OUTPUT)/%.o: %.c $(BPF_SKELS) $(KHDR_INCLUDES)/linux/hid.h
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$(call msg,CC,,$@)
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$(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
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$(OUTPUT)/%: $(OUTPUT)/%.o
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$(call msg,BINARY,,$@)
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$(Q)$(LINK.c) $^ $(LDLIBS) -o $@
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EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) feature bpftool \
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$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32)
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