1# SPDX-License-Identifier: GPL-2.0
2
3LIBDIR := ../../../lib
4BPFDIR := $(LIBDIR)/bpf
5APIDIR := ../../../include/uapi
6GENDIR := ../../../../include/generated
7GENHDR := $(GENDIR)/autoconf.h
8
9ifneq ($(wildcard $(GENHDR)),)
10  GENFLAGS := -DHAVE_GENHDR
11endif
12
13CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include
14LDLIBS += -lcap -lelf -lrt -lpthread
15
16TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
17all: $(TEST_CUSTOM_PROGS)
18
19$(TEST_CUSTOM_PROGS): urandom_read
20
21urandom_read: urandom_read.c
22	$(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
23
24# Order correspond to 'make run_tests' order
25TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
26	test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
27	test_sock test_btf test_sockmap
28
29TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \
30	test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o     \
31	sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o test_tracepoint.o \
32	test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \
33	sample_map_ret0.o test_tcpbpf_kern.o test_stacktrace_build_id.o \
34	sockmap_tcp_msg_prog.o connect4_prog.o connect6_prog.o test_adjust_tail.o \
35	test_btf_haskv.o test_btf_nokv.o test_sockmap_kern.o test_tunnel_kern.o \
36	test_get_stack_rawtp.o test_sockmap_kern.o test_sockhash_kern.o \
37	test_lwt_seg6local.o
38
39# Order correspond to 'make run_tests' order
40TEST_PROGS := test_kmod.sh \
41	test_libbpf.sh \
42	test_xdp_redirect.sh \
43	test_xdp_meta.sh \
44	test_offload.py \
45	test_sock_addr.sh \
46	test_tunnel.sh \
47	test_lwt_seg6local.sh
48
49# Compile but not part of 'make run_tests'
50TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr
51
52include ../lib.mk
53
54BPFOBJ := $(OUTPUT)/libbpf.a
55
56$(TEST_GEN_PROGS): $(BPFOBJ)
57
58$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/libbpf.a
59
60$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
61$(OUTPUT)/test_sock: cgroup_helpers.c
62$(OUTPUT)/test_sock_addr: cgroup_helpers.c
63$(OUTPUT)/test_sockmap: cgroup_helpers.c
64$(OUTPUT)/test_progs: trace_helpers.c
65
66.PHONY: force
67
68# force a rebuild of BPFOBJ when its dependencies are updated
69force:
70
71$(BPFOBJ): force
72	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
73
74CLANG ?= clang
75LLC   ?= llc
76LLVM_OBJCOPY ?= llvm-objcopy
77BTF_PAHOLE ?= pahole
78
79PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
80
81# Let newer LLVM versions transparently probe the kernel for availability
82# of full BPF instruction set.
83ifeq ($(PROBE),)
84  CPU ?= probe
85else
86  CPU ?= generic
87endif
88
89# Get Clang's default includes on this system, as opposed to those seen by
90# '-target bpf'. This fixes "missing" files on some architectures/distros,
91# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
92#
93# Use '-idirafter': Don't interfere with include mechanics except where the
94# build would have failed anyways.
95CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
96	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
97
98CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
99	      $(CLANG_SYS_INCLUDES) \
100	      -Wno-compare-distinct-pointer-types
101
102$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
103$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline
104
105BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
106BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
107BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --version 2>&1 | grep LLVM)
108
109ifneq ($(BTF_LLC_PROBE),)
110ifneq ($(BTF_PAHOLE_PROBE),)
111ifneq ($(BTF_OBJCOPY_PROBE),)
112	CLANG_FLAGS += -g
113	LLC_FLAGS += -mattr=dwarfris
114	DWARF2BTF = y
115endif
116endif
117endif
118
119$(OUTPUT)/%.o: %.c
120	$(CLANG) $(CLANG_FLAGS) \
121		 -O2 -target bpf -emit-llvm -c $< -o - |      \
122	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
123ifeq ($(DWARF2BTF),y)
124	$(BTF_PAHOLE) -J $@
125endif
126
127EXTRA_CLEAN := $(TEST_CUSTOM_PROGS)
128