1 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2- 1 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2 include ../../scripts/Makefile.include !! 2 OUTPUT := .output
3 !! 3 CLANG ?= clang
4 OUTPUT ?= $(abspath .output)/ !! 4 LLC ?= llc
5 !! 5 LLVM_STRIP ?= llvm-strip
6 BPFTOOL_OUTPUT := $(OUTPUT)bpftool/ !! 6 DEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool
7 DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)bootstrap/ <<
8 BPFTOOL ?= $(DEFAULT_BPFTOOL) 7 BPFTOOL ?= $(DEFAULT_BPFTOOL)
9 LIBBPF_SRC := $(abspath ../../lib/bpf) 8 LIBBPF_SRC := $(abspath ../../lib/bpf)
10 BPFOBJ_OUTPUT := $(OUTPUT)libbpf/ !! 9 BPFOBJ := $(OUTPUT)/libbpf.a
11 BPFOBJ := $(BPFOBJ_OUTPUT)libbpf.a !! 10 BPF_INCLUDE := $(OUTPUT)
12 BPF_DESTDIR := $(BPFOBJ_OUTPUT) !! 11 INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../lib)
13 BPF_INCLUDE := $(BPF_DESTDIR)/include !! 12 CFLAGS := -g -Wall
14 INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(a <<
15 CFLAGS := -g -Wall $(CLANG_CROSS_FLAGS) <<
16 CFLAGS += $(EXTRA_CFLAGS) <<
17 LDFLAGS += $(EXTRA_LDFLAGS) <<
18 LDLIBS += -lelf -lz <<
19 13
20 # Try to detect best kernel BTF source 14 # Try to detect best kernel BTF source
21 KERNEL_REL := $(shell uname -r) 15 KERNEL_REL := $(shell uname -r)
22 VMLINUX_BTF_PATHS := $(if $(O),$(O)/vmlinux) !! 16 VMLINUX_BTF_PATHS := /sys/kernel/btf/vmlinux /boot/vmlinux-$(KERNEL_REL)
23 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT) <<
24 ../../../vmlinux /sys/kernel/btf/vmlin <<
25 /boot/vmlinux-$(KERNEL_REL) <<
26 VMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firs 17 VMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firstword \
27 $(wi 18 $(wildcard $(VMLINUX_BTF_PATHS))))
28 19
>> 20 abs_out := $(abspath $(OUTPUT))
29 ifeq ($(V),1) 21 ifeq ($(V),1)
30 Q = 22 Q =
>> 23 msg =
31 else 24 else
32 Q = @ 25 Q = @
>> 26 msg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
33 MAKEFLAGS += --no-print-directory 27 MAKEFLAGS += --no-print-directory
34 submake_extras := feature_display=0 28 submake_extras := feature_display=0
35 endif 29 endif
36 30
37 .DELETE_ON_ERROR: 31 .DELETE_ON_ERROR:
38 32
39 .PHONY: all clean runqslower libbpf_hdrs !! 33 .PHONY: all clean runqslower
40 all: runqslower 34 all: runqslower
41 35
42 runqslower: $(OUTPUT)/runqslower 36 runqslower: $(OUTPUT)/runqslower
43 37
44 clean: 38 clean:
45 $(call QUIET_CLEAN, runqslower) !! 39 $(call msg,CLEAN)
46 $(Q)$(RM) -r $(BPFOBJ_OUTPUT) $(BPFTOO !! 40 $(Q)rm -rf $(OUTPUT) runqslower
47 $(Q)$(RM) $(OUTPUT)*.o $(OUTPUT)*.d <<
48 $(Q)$(RM) $(OUTPUT)*.skel.h $(OUTPUT)v <<
49 $(Q)$(RM) $(OUTPUT)runqslower <<
50 $(Q)$(RM) -r .output <<
51 <<
52 libbpf_hdrs: $(BPFOBJ) <<
53 41
54 $(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $ 42 $(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ)
55 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS !! 43 $(call msg,BINARY,$@)
>> 44 $(Q)$(CC) $(CFLAGS) $^ -lelf -lz -o $@
56 45
57 $(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT) 46 $(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT)/runqslower.skel.h \
58 $(OUTPUT)/runqslower.b !! 47 $(OUTPUT)/runqslower.bpf.o
59 48
60 $(OUTPUT)/runqslower.bpf.o: $(OUTPUT)/vmlinux. !! 49 $(OUTPUT)/runqslower.bpf.o: $(OUTPUT)/vmlinux.h runqslower.h
61 50
62 $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFT 51 $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL)
63 $(QUIET_GEN)$(BPFTOOL) gen skeleton $< !! 52 $(call msg,GEN-SKEL,$@)
>> 53 $(Q)$(BPFTOOL) gen skeleton $< > $@
64 54
65 $(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPU 55 $(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT)
66 $(QUIET_GEN)$(CLANG) -g -O2 --target=b !! 56 $(call msg,BPF,$@)
>> 57 $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \
67 -c $(filter %.c,$^) -o $@ && 58 -c $(filter %.c,$^) -o $@ && \
68 $(LLVM_STRIP) -g $@ 59 $(LLVM_STRIP) -g $@
69 60
70 $(OUTPUT)/%.o: %.c | $(OUTPUT) 61 $(OUTPUT)/%.o: %.c | $(OUTPUT)
71 $(QUIET_CC)$(CC) $(CFLAGS) $(INCLUDES) !! 62 $(call msg,CC,$@)
>> 63 $(Q)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@
72 64
73 $(OUTPUT) $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT): !! 65 $(OUTPUT):
74 $(QUIET_MKDIR)mkdir -p $@ !! 66 $(call msg,MKDIR,$@)
>> 67 $(Q)mkdir -p $(OUTPUT)
75 68
76 $(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(O 69 $(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL)
77 ifeq ($(VMLINUX_H),) !! 70 $(call msg,GEN,$@)
78 $(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] 71 $(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] ; then \
79 echo "Couldn't find kernel BTF 72 echo "Couldn't find kernel BTF; set VMLINUX_BTF to" \
80 "specify its location. 73 "specify its location." >&2; \
81 exit 1;\ 74 exit 1;\
82 fi 75 fi
83 $(QUIET_GEN)$(BPFTOOL) btf dump file $ !! 76 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@
84 else <<
85 $(Q)cp "$(VMLINUX_H)" $@ <<
86 endif <<
87 <<
88 $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(L <<
89 $(Q)$(MAKE) $(submake_extras) -C $(LIB <<
90 DESTDIR=$(BPFOBJ_OUTPUT) p <<
91 77
92 $(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT) !! 78 $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)
93 $(Q)$(MAKE) $(submake_extras) -C ../bp !! 79 $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) \
>> 80 OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
>> 81
>> 82 $(DEFAULT_BPFTOOL):
>> 83 $(Q)$(MAKE) $(submake_extras) -C ../bpftool \
>> 84 prefix= OUTPUT=$(abs_out)/ DESTDIR=$(abs_out) install
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