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