tools/testing/selftests/bpf/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../../../build/Build.include
   3 include ../../../scripts/Makefile.arch
   4 include ../../../scripts/Makefile.include
   5
   6 CXX ?= $(CROSS_COMPILE)g++
   7
   8 CURDIR := $(abspath .)
   9 TOOLSDIR := $(abspath ../../..)
  10 LIBDIR := $(TOOLSDIR)/lib
  11 BPFDIR := $(LIBDIR)/bpf
  12 TOOLSINCDIR := $(TOOLSDIR)/include
  13 BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
  14 APIDIR := $(TOOLSINCDIR)/uapi
  15 ifneq ($(O),)
  16 GENDIR := $(O)/include/generated
  17 else
  18 GENDIR := $(abspath ../../../../include/generated)
  19 endif
  20 GENHDR := $(GENDIR)/autoconf.h
  21 HOSTPKG_CONFIG := pkg-config
  22
  23 ifneq ($(wildcard $(GENHDR)),)
  24   GENFLAGS := -DHAVE_GENHDR
  25 endif
  26
  27 BPF_GCC         ?= $(shell command -v bpf-gcc;)
  28 SAN_CFLAGS      ?=
  29 SAN_LDFLAGS     ?= $(SAN_CFLAGS)
  30 CFLAGS += -g -O0 -rdynamic -Wall -Werror $(GENFLAGS) $(SAN_CFLAGS)      \
  31           -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)          \
  32           -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT)
  33 LDFLAGS += $(SAN_LDFLAGS)
  34 LDLIBS += -lelf -lz -lrt -lpthread
  35
  36 ifneq ($(LLVM),)
  37 # Silence some warnings when compiled with clang
  38 CFLAGS += -Wno-unused-command-line-argument
  39 endif
  40
  41 # Check whether bpf cpu=v4 is supported or not by clang
  42 ifneq ($(shell $(CLANG) --target=bpf -mcpu=help 2>&1 | grep 'v4'),)
  43 CLANG_CPUV4 := 1
  44 endif
  45
  46 # Order correspond to 'make run_tests' order
  47 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
  48         test_dev_cgroup \
  49         test_sock test_sockmap get_cgroup_id_user \
  50         test_cgroup_storage \
  51         test_tcpnotify_user test_sysctl \
  52         test_progs-no_alu32
  53
  54 # Also test bpf-gcc, if present
  55 ifneq ($(BPF_GCC),)
  56 TEST_GEN_PROGS += test_progs-bpf_gcc
  57 endif
  58
  59 ifneq ($(CLANG_CPUV4),)
  60 TEST_GEN_PROGS += test_progs-cpuv4
  61 endif
  62
  63 TEST_GEN_FILES = test_lwt_ip_encap.bpf.o test_tc_edt.bpf.o
  64 TEST_FILES = xsk_prereqs.sh $(wildcard progs/btf_dump_test_case_*.c)
  65
  66 # Order correspond to 'make run_tests' order
  67 TEST_PROGS := test_kmod.sh \
  68         test_xdp_redirect.sh \
  69         test_xdp_redirect_multi.sh \
  70         test_xdp_meta.sh \
  71         test_xdp_veth.sh \
  72         test_offload.py \
  73         test_sock_addr.sh \
  74         test_tunnel.sh \
  75         test_lwt_seg6local.sh \
  76         test_lirc_mode2.sh \
  77         test_skb_cgroup_id.sh \
  78         test_flow_dissector.sh \
  79         test_xdp_vlan_mode_generic.sh \
  80         test_xdp_vlan_mode_native.sh \
  81         test_lwt_ip_encap.sh \
  82         test_tcp_check_syncookie.sh \
  83         test_tc_tunnel.sh \
  84         test_tc_edt.sh \
  85         test_xdping.sh \
  86         test_bpftool_build.sh \
  87         test_bpftool.sh \
  88         test_bpftool_metadata.sh \
  89         test_doc_build.sh \
  90         test_xsk.sh \
  91         test_xdp_features.sh
  92
  93 TEST_PROGS_EXTENDED := with_addr.sh \
  94         with_tunnels.sh ima_setup.sh verify_sig_setup.sh \
  95         test_xdp_vlan.sh test_bpftool.py
  96
  97 # Compile but not part of 'make run_tests'
  98 TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
  99         flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
 100         test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
 101         xskxceiver xdp_redirect_multi xdp_synproxy veristat xdp_hw_metadata \
 102         xdp_features
 103
 104 TEST_GEN_FILES += liburandom_read.so urandom_read sign-file
 105
 106 # Emit succinct information message describing current building step
 107 # $1 - generic step name (e.g., CC, LINK, etc);
 108 # $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
 109 # $3 - target (assumed to be file); only file name will be emitted;
 110 # $4 - optional extra arg, emitted as-is, if provided.
 111 ifeq ($(V),1)
 112 Q =
 113 msg =
 114 else
 115 Q = @
 116 msg = @printf '  %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
 117 MAKEFLAGS += --no-print-directory
 118 submake_extras := feature_display=0
 119 endif
 120
 121 # override lib.mk's default rules
 122 OVERRIDE_TARGETS := 1
 123 override define CLEAN
 124         $(call msg,CLEAN)
 125         $(Q)$(RM) -r $(TEST_GEN_PROGS)
 126         $(Q)$(RM) -r $(TEST_GEN_PROGS_EXTENDED)
 127         $(Q)$(RM) -r $(TEST_GEN_FILES)
 128         $(Q)$(RM) -r $(EXTRA_CLEAN)
 129         $(Q)$(MAKE) -C bpf_testmod clean
 130         $(Q)$(MAKE) docs-clean
 131 endef
 132
 133 include ../lib.mk
 134
 135 SCRATCH_DIR := $(OUTPUT)/tools
 136 BUILD_DIR := $(SCRATCH_DIR)/build
 137 INCLUDE_DIR := $(SCRATCH_DIR)/include
 138 BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
 139 ifneq ($(CROSS_COMPILE),)
 140 HOST_BUILD_DIR          := $(BUILD_DIR)/host
 141 HOST_SCRATCH_DIR        := $(OUTPUT)/host-tools
 142 HOST_INCLUDE_DIR        := $(HOST_SCRATCH_DIR)/include
 143 else
 144 HOST_BUILD_DIR          := $(BUILD_DIR)
 145 HOST_SCRATCH_DIR        := $(SCRATCH_DIR)
 146 HOST_INCLUDE_DIR        := $(INCLUDE_DIR)
 147 endif
 148 HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
 149 RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
 150 RUNQSLOWER_OUTPUT := $(BUILD_DIR)/runqslower/
 151
 152 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 153                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 154                      ../../../../vmlinux                                \
 155                      /sys/kernel/btf/vmlinux                            \
 156                      /boot/vmlinux-$(shell uname -r)
 157 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 158 ifeq ($(VMLINUX_BTF),)
 159 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
 160 endif
 161
 162 # Define simple and short `make test_progs`, `make test_sysctl`, etc targets
 163 # to build individual tests.
 164 # NOTE: Semicolon at the end is critical to override lib.mk's default static
 165 # rule for binaries.
 166 $(notdir $(TEST_GEN_PROGS)                                              \
 167          $(TEST_GEN_PROGS_EXTENDED)                                     \
 168          $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ;
 169
 170 # sort removes libbpf duplicates when not cross-building
 171 MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf        \
 172                $(BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/bpftool           \
 173                $(HOST_BUILD_DIR)/resolve_btfids                         \
 174                $(RUNQSLOWER_OUTPUT) $(INCLUDE_DIR))
 175 $(MAKE_DIRS):
 176         $(call msg,MKDIR,,$@)
 177         $(Q)mkdir -p $@
 178
 179 $(OUTPUT)/%.o: %.c
 180         $(call msg,CC,,$@)
 181         $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
 182
 183 $(OUTPUT)/%:%.c
 184         $(call msg,BINARY,,$@)
 185         $(Q)$(LINK.c) $^ $(LDLIBS) -o $@
 186
 187 # LLVM's ld.lld doesn't support all the architectures, so use it only on x86
 188 ifeq ($(SRCARCH),x86)
 189 LLD := lld
 190 else
 191 LLD := ld
 192 endif
 193
 194 # Filter out -static for liburandom_read.so and its dependent targets so that static builds
 195 # do not fail. Static builds leave urandom_read relying on system-wide shared libraries.
 196 $(OUTPUT)/liburandom_read.so: urandom_read_lib1.c urandom_read_lib2.c
 197         $(call msg,LIB,,$@)
 198         $(Q)$(CLANG) $(filter-out -static,$(CFLAGS) $(LDFLAGS))   \
 199                      $^ $(filter-out -static,$(LDLIBS))      \
 200                      -fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
 201                      -fPIC -shared -o $@
 202
 203 $(OUTPUT)/urandom_read: urandom_read.c urandom_read_aux.c $(OUTPUT)/liburandom_read.so
 204         $(call msg,BINARY,,$@)
 205         $(Q)$(CLANG) $(filter-out -static,$(CFLAGS) $(LDFLAGS)) $(filter %.c,$^) \
 206                      -lurandom_read $(filter-out -static,$(LDLIBS)) -L$(OUTPUT)  \
 207                      -fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
 208                      -Wl,-rpath=. -o $@
 209
 210 $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c
 211         $(call msg,SIGN-FILE,,$@)
 212         $(Q)$(CC) $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null) \
 213                   $< -o $@ \
 214                   $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)
 215
 216 $(OUTPUT)/bpf_testmod.ko: $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard bpf_testmod/Makefile bpf_testmod/*.[ch])
 217         $(call msg,MOD,,$@)
 218         $(Q)$(RM) bpf_testmod/bpf_testmod.ko # force re-compilation
 219         $(Q)$(MAKE) $(submake_extras) RESOLVE_BTFIDS=$(RESOLVE_BTFIDS) -C bpf_testmod
 220         $(Q)cp bpf_testmod/bpf_testmod.ko $@
 221
 222 DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
 223 ifneq ($(CROSS_COMPILE),)
 224 CROSS_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool
 225 TRUNNER_BPFTOOL := $(CROSS_BPFTOOL)
 226 USE_BOOTSTRAP := ""
 227 else
 228 TRUNNER_BPFTOOL := $(DEFAULT_BPFTOOL)
 229 USE_BOOTSTRAP := "bootstrap/"
 230 endif
 231
 232 $(OUTPUT)/runqslower: $(BPFOBJ) | $(DEFAULT_BPFTOOL) $(RUNQSLOWER_OUTPUT)
 233         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower            \
 234                     OUTPUT=$(RUNQSLOWER_OUTPUT) VMLINUX_BTF=$(VMLINUX_BTF)     \
 235                     BPFTOOL_OUTPUT=$(HOST_BUILD_DIR)/bpftool/                  \
 236                     BPFOBJ_OUTPUT=$(BUILD_DIR)/libbpf                          \
 237                     BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR)                \
 238                     EXTRA_CFLAGS='-g -O0 $(SAN_CFLAGS)'                        \
 239                     EXTRA_LDFLAGS='$(SAN_LDFLAGS)' &&                          \
 240                     cp $(RUNQSLOWER_OUTPUT)runqslower $@
 241
 242 TEST_GEN_PROGS_EXTENDED += $(TRUNNER_BPFTOOL)
 243
 244 $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ)
 245
 246 TESTING_HELPERS := $(OUTPUT)/testing_helpers.o
 247 CGROUP_HELPERS  := $(OUTPUT)/cgroup_helpers.o
 248 UNPRIV_HELPERS  := $(OUTPUT)/unpriv_helpers.o
 249 TRACE_HELPERS   := $(OUTPUT)/trace_helpers.o
 250 JSON_WRITER             := $(OUTPUT)/json_writer.o
 251 CAP_HELPERS     := $(OUTPUT)/cap_helpers.o
 252
 253 $(OUTPUT)/test_dev_cgroup: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 254 $(OUTPUT)/test_skb_cgroup_id_user: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 255 $(OUTPUT)/test_sock: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 256 $(OUTPUT)/test_sock_addr: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 257 $(OUTPUT)/test_sockmap: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 258 $(OUTPUT)/test_tcpnotify_user: $(CGROUP_HELPERS) $(TESTING_HELPERS) $(TRACE_HELPERS)
 259 $(OUTPUT)/get_cgroup_id_user: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 260 $(OUTPUT)/test_cgroup_storage: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 261 $(OUTPUT)/test_sock_fields: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 262 $(OUTPUT)/test_sysctl: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 263 $(OUTPUT)/test_tag: $(TESTING_HELPERS)
 264 $(OUTPUT)/test_lirc_mode2_user: $(TESTING_HELPERS)
 265 $(OUTPUT)/xdping: $(TESTING_HELPERS)
 266 $(OUTPUT)/flow_dissector_load: $(TESTING_HELPERS)
 267 $(OUTPUT)/test_maps: $(TESTING_HELPERS)
 268 $(OUTPUT)/test_verifier: $(TESTING_HELPERS) $(CAP_HELPERS) $(UNPRIV_HELPERS)
 269 $(OUTPUT)/xsk.o: $(BPFOBJ)
 270
 271 BPFTOOL ?= $(DEFAULT_BPFTOOL)
 272 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
 273                     $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
 274         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                        \
 275                     ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD="$(HOSTLD)"         \
 276                     EXTRA_CFLAGS='-g -O0'                                      \
 277                     OUTPUT=$(HOST_BUILD_DIR)/bpftool/                          \
 278                     LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/                    \
 279                     LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/                        \
 280                     prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin
 281
 282 ifneq ($(CROSS_COMPILE),)
 283 $(CROSS_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)       \
 284                     $(BPFOBJ) | $(BUILD_DIR)/bpftool
 285         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                         \
 286                     ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE)                 \
 287                     EXTRA_CFLAGS='-g -O0'                                       \
 288                     OUTPUT=$(BUILD_DIR)/bpftool/                                \
 289                     LIBBPF_OUTPUT=$(BUILD_DIR)/libbpf/                          \
 290                     LIBBPF_DESTDIR=$(SCRATCH_DIR)/                              \
 291                     prefix= DESTDIR=$(SCRATCH_DIR)/ install-bin
 292 endif
 293
 294 all: docs
 295
 296 docs:
 297         $(Q)RST2MAN_OPTS="--exit-status=1" $(MAKE) $(submake_extras)    \
 298                     -f Makefile.docs                                    \
 299                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 300
 301 docs-clean:
 302         $(Q)$(MAKE) $(submake_extras)                                   \
 303                     -f Makefile.docs                                    \
 304                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 305
 306 $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                     \
 307            $(APIDIR)/linux/bpf.h                                               \
 308            | $(BUILD_DIR)/libbpf
 309         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
 310                     EXTRA_CFLAGS='-g -O0 $(SAN_CFLAGS)'                        \
 311                     EXTRA_LDFLAGS='$(SAN_LDFLAGS)'                             \
 312                     DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
 313
 314 ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
 315 $(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                \
 316                 $(APIDIR)/linux/bpf.h                                          \
 317                 | $(HOST_BUILD_DIR)/libbpf
 318         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR)                             \
 319                     EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE=                 \
 320                     OUTPUT=$(HOST_BUILD_DIR)/libbpf/                           \
 321                     CC="$(HOSTCC)" LD="$(HOSTLD)"                              \
 322                     DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
 323 endif
 324
 325 $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
 326 ifeq ($(VMLINUX_H),)
 327         $(call msg,GEN,,$@)
 328         $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
 329 else
 330         $(call msg,CP,,$@)
 331         $(Q)cp "$(VMLINUX_H)" $@
 332 endif
 333
 334 $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids    \
 335                        $(TOOLSDIR)/bpf/resolve_btfids/main.c    \
 336                        $(TOOLSDIR)/lib/rbtree.c                 \
 337                        $(TOOLSDIR)/lib/zalloc.c                 \
 338                        $(TOOLSDIR)/lib/string.c                 \
 339                        $(TOOLSDIR)/lib/ctype.c                  \
 340                        $(TOOLSDIR)/lib/str_error_r.c
 341         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \
 342                 CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" \
 343                 LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \
 344                 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
 345
 346 # Get Clang's default includes on this system, as opposed to those seen by
 347 # '--target=bpf'. This fixes "missing" files on some architectures/distros,
 348 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
 349 #
 350 # Use '-idirafter': Don't interfere with include mechanics except where the
 351 # build would have failed anyways.
 352 define get_sys_includes
 353 $(shell $(1) $(2) -v -E - </dev/null 2>&1 \
 354         | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
 355 $(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') \
 356 $(shell $(1) $(2) -dM -E - </dev/null | grep '__loongarch_grlen ' | awk '{printf("-D__BITS_PER_LONG=%d", $$3)}')
 357 endef
 358
 359 # Determine target endianness.
 360 IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
 361                         grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
 362 MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
 363
 364 ifneq ($(CROSS_COMPILE),)
 365 CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%))
 366 endif
 367
 368 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
 369 BPF_CFLAGS = -g -Wall -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN)     \
 370              -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR)                   \
 371              -I$(abspath $(OUTPUT)/../usr/include)
 372
 373 CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
 374                -Wno-compare-distinct-pointer-types
 375
 376 $(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline
 377 $(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline
 378
 379 $(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
 380 $(OUTPUT)/cgroup_getset_retval_hooks.o: cgroup_getset_retval_hooks.h
 381
 382 # Build BPF object using Clang
 383 # $1 - input .c file
 384 # $2 - output .o file
 385 # $3 - CFLAGS
 386 define CLANG_BPF_BUILD_RULE
 387         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 388         $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2
 389 endef
 390 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
 391 define CLANG_NOALU32_BPF_BUILD_RULE
 392         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 393         $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2
 394 endef
 395 # Similar to CLANG_BPF_BUILD_RULE, but with cpu-v4
 396 define CLANG_CPUV4_BPF_BUILD_RULE
 397         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 398         $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v4 -o $2
 399 endef
 400 # Build BPF object using GCC
 401 define GCC_BPF_BUILD_RULE
 402         $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
 403         $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
 404 endef
 405
 406 SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
 407
 408 LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h           \
 409                 linked_vars.skel.h linked_maps.skel.h                   \
 410                 test_subskeleton.skel.h test_subskeleton_lib.skel.h     \
 411                 test_usdt.skel.h
 412
 413 LSKELS := fentry_test.c fexit_test.c fexit_sleep.c atomics.c            \
 414         trace_printk.c trace_vprintk.c map_ptr_kern.c                   \
 415         core_kern.c core_kern_overflow.c test_ringbuf.c                 \
 416         test_ringbuf_map_key.c
 417
 418 # Generate both light skeleton and libbpf skeleton for these
 419 LSKELS_EXTRA := test_ksyms_module.c test_ksyms_weak.c kfunc_call_test.c \
 420         kfunc_call_test_subprog.c
 421 SKEL_BLACKLIST += $$(LSKELS)
 422
 423 test_static_linked.skel.h-deps := test_static_linked1.bpf.o test_static_linked2.bpf.o
 424 linked_funcs.skel.h-deps := linked_funcs1.bpf.o linked_funcs2.bpf.o
 425 linked_vars.skel.h-deps := linked_vars1.bpf.o linked_vars2.bpf.o
 426 linked_maps.skel.h-deps := linked_maps1.bpf.o linked_maps2.bpf.o
 427 # In the subskeleton case, we want the test_subskeleton_lib.subskel.h file
 428 # but that's created as a side-effect of the skel.h generation.
 429 test_subskeleton.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o test_subskeleton.bpf.o
 430 test_subskeleton_lib.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o
 431 test_usdt.skel.h-deps := test_usdt.bpf.o test_usdt_multispec.bpf.o
 432 xsk_xdp_progs.skel.h-deps := xsk_xdp_progs.bpf.o
 433 xdp_hw_metadata.skel.h-deps := xdp_hw_metadata.bpf.o
 434 xdp_features.skel.h-deps := xdp_features.bpf.o
 435
 436 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
 437
 438 # Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on
 439 # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
 440 # Parameters:
 441 # $1 - test runner base binary name (e.g., test_progs)
 442 # $2 - test runner extra "flavor" (e.g., no_alu32, cpuv4, gcc-bpf, etc)
 443 define DEFINE_TEST_RUNNER
 444
 445 TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2
 446 TRUNNER_BINARY := $1$(if $2,-)$2
 447 TRUNNER_TEST_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.test.o,       \
 448                                  $$(notdir $$(wildcard $(TRUNNER_TESTS_DIR)/*.c)))
 449 TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,           \
 450                                  $$(filter %.c,$(TRUNNER_EXTRA_SOURCES)))
 451 TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
 452 TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
 453 TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
 454 TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS))
 455 TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,       \
 456                                  $$(filter-out $(SKEL_BLACKLIST) $(LINKED_BPF_SRCS),\
 457                                                $$(TRUNNER_BPF_SRCS)))
 458 TRUNNER_BPF_LSKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.lskel.h, $$(LSKELS) $$(LSKELS_EXTRA))
 459 TRUNNER_BPF_SKELS_LINKED := $$(addprefix $$(TRUNNER_OUTPUT)/,$(LINKED_SKELS))
 460 TEST_GEN_FILES += $$(TRUNNER_BPF_OBJS)
 461
 462 # Evaluate rules now with extra TRUNNER_XXX variables above already defined
 463 $$(eval $$(call DEFINE_TEST_RUNNER_RULES,$1,$2))
 464
 465 endef
 466
 467 # Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and
 468 # set up by DEFINE_TEST_RUNNER itself, create test runner build rules with:
 469 # $1 - test runner base binary name (e.g., test_progs)
 470 # $2 - test runner extra "flavor" (e.g., no_alu32, cpuv4, gcc-bpf, etc)
 471 define DEFINE_TEST_RUNNER_RULES
 472
 473 ifeq ($($(TRUNNER_OUTPUT)-dir),)
 474 $(TRUNNER_OUTPUT)-dir := y
 475 $(TRUNNER_OUTPUT):
 476         $$(call msg,MKDIR,,$$@)
 477         $(Q)mkdir -p $$@
 478 endif
 479
 480 # ensure we set up BPF objects generation rule just once for a given
 481 # input/output directory combination
 482 ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),)
 483 $(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
 484 $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.bpf.o:                         \
 485                      $(TRUNNER_BPF_PROGS_DIR)/%.c                       \
 486                      $(TRUNNER_BPF_PROGS_DIR)/*.h                       \
 487                      $$(INCLUDE_DIR)/vmlinux.h                          \
 488                      $(wildcard $(BPFDIR)/bpf_*.h)                      \
 489                      $(wildcard $(BPFDIR)/*.bpf.h)                      \
 490                      | $(TRUNNER_OUTPUT) $$(BPFOBJ)
 491         $$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,                      \
 492                                           $(TRUNNER_BPF_CFLAGS))
 493
 494 $(TRUNNER_BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 495         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 496         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
 497         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
 498         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
 499         $(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
 500         $(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$@
 501         $(Q)$$(BPFTOOL) gen subskeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$(@:.skel.h=.subskel.h)
 502
 503 $(TRUNNER_BPF_LSKELS): %.lskel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 504         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 505         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked1.o) $$<
 506         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked2.o) $$(<:.o=.llinked1.o)
 507         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked3.o) $$(<:.o=.llinked2.o)
 508         $(Q)diff $$(<:.o=.llinked2.o) $$(<:.o=.llinked3.o)
 509         $(Q)$$(BPFTOOL) gen skeleton -L $$(<:.o=.llinked3.o) name $$(notdir $$(<:.bpf.o=_lskel)) > $$@
 510
 511 $(TRUNNER_BPF_SKELS_LINKED): $(TRUNNER_BPF_OBJS) $(BPFTOOL) | $(TRUNNER_OUTPUT)
 512         $$(call msg,LINK-BPF,$(TRUNNER_BINARY),$$(@:.skel.h=.bpf.o))
 513         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked1.o) $$(addprefix $(TRUNNER_OUTPUT)/,$$($$(@F)-deps))
 514         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked1.o)
 515         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked3.o) $$(@:.skel.h=.linked2.o)
 516         $(Q)diff $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked3.o)
 517         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 518         $(Q)$$(BPFTOOL) gen skeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$@
 519         $(Q)$$(BPFTOOL) gen subskeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$(@:.skel.h=.subskel.h)
 520 endif
 521
 522 # ensure we set up tests.h header generation rule just once
 523 ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)
 524 $(TRUNNER_TESTS_DIR)-tests-hdr := y
 525 $(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c
 526         $$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)
 527         $$(shell (echo '/* Generated header, do not edit */';                                   \
 528                   sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\((void)?\).*/DEFINE_TEST(\2)/p'     \
 529                         $(TRUNNER_TESTS_DIR)/*.c | sort ;       \
 530                  ) > $$@)
 531 endif
 532
 533 # compile individual test files
 534 # Note: we cd into output directory to ensure embedded BPF object is found
 535 $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o:                       \
 536                       $(TRUNNER_TESTS_DIR)/%.c                          \
 537                       $(TRUNNER_EXTRA_HDRS)                             \
 538                       $(TRUNNER_BPF_OBJS)                               \
 539                       $(TRUNNER_BPF_SKELS)                              \
 540                       $(TRUNNER_BPF_LSKELS)                             \
 541                       $(TRUNNER_BPF_SKELS_LINKED)                       \
 542                       $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 543         $$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
 544         $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
 545
 546 $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:                           \
 547                        %.c                                              \
 548                        $(TRUNNER_EXTRA_HDRS)                            \
 549                        $(TRUNNER_TESTS_HDR)                             \
 550                        $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 551         $$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@)
 552         $(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
 553
 554 # non-flavored in-srctree builds receive special treatment, in particular, we
 555 # do not need to copy extra resources (see e.g. test_btf_dump_case())
 556 $(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT)
 557 ifneq ($2:$(OUTPUT),:$(shell pwd))
 558         $$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
 559         $(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/
 560 endif
 561
 562 $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS)                       \
 563                              $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ)           \
 564                              $(RESOLVE_BTFIDS)                          \
 565                              $(TRUNNER_BPFTOOL)                         \
 566                              | $(TRUNNER_BINARY)-extras
 567         $$(call msg,BINARY,,$$@)
 568         $(Q)$$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@
 569         $(Q)$(RESOLVE_BTFIDS) --btf $(TRUNNER_OUTPUT)/btf_data.bpf.o $$@
 570         $(Q)ln -sf $(if $2,..,.)/tools/build/bpftool/$(USE_BOOTSTRAP)bpftool \
 571                    $(OUTPUT)/$(if $2,$2/)bpftool
 572
 573 endef
 574
 575 # Define test_progs test runner.
 576 TRUNNER_TESTS_DIR := prog_tests
 577 TRUNNER_BPF_PROGS_DIR := progs
 578 TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c  \
 579                          network_helpers.c testing_helpers.c            \
 580                          btf_helpers.c flow_dissector_load.h            \
 581                          cap_helpers.c test_loader.c xsk.c disasm.c     \
 582                          json_writer.c unpriv_helpers.c                 \
 583                          ip_check_defrag_frags.h
 584 TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko  \
 585                        $(OUTPUT)/liburandom_read.so                     \
 586                        $(OUTPUT)/xdp_synproxy                           \
 587                        $(OUTPUT)/sign-file                              \
 588                        $(OUTPUT)/uprobe_multi                           \
 589                        ima_setup.sh                                     \
 590                        verify_sig_setup.sh                              \
 591                        $(wildcard progs/btf_dump_test_case_*.c)         \
 592                        $(wildcard progs/*.bpf.o)
 593 TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
 594 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS) -DENABLE_ATOMICS_TESTS
 595 $(eval $(call DEFINE_TEST_RUNNER,test_progs))
 596
 597 # Define test_progs-no_alu32 test runner.
 598 TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE
 599 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 600 $(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32))
 601
 602 # Define test_progs-cpuv4 test runner.
 603 ifneq ($(CLANG_CPUV4),)
 604 TRUNNER_BPF_BUILD_RULE := CLANG_CPUV4_BPF_BUILD_RULE
 605 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 606 $(eval $(call DEFINE_TEST_RUNNER,test_progs,cpuv4))
 607 endif
 608
 609 # Define test_progs BPF-GCC-flavored test runner.
 610 ifneq ($(BPF_GCC),)
 611 TRUNNER_BPF_BUILD_RULE := GCC_BPF_BUILD_RULE
 612 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(call get_sys_includes,gcc,)
 613 $(eval $(call DEFINE_TEST_RUNNER,test_progs,bpf_gcc))
 614 endif
 615
 616 # Define test_maps test runner.
 617 TRUNNER_TESTS_DIR := map_tests
 618 TRUNNER_BPF_PROGS_DIR := progs
 619 TRUNNER_EXTRA_SOURCES := test_maps.c
 620 TRUNNER_EXTRA_FILES :=
 621 TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
 622 TRUNNER_BPF_CFLAGS :=
 623 $(eval $(call DEFINE_TEST_RUNNER,test_maps))
 624
 625 # Define test_verifier test runner.
 626 # It is much simpler than test_maps/test_progs and sufficiently different from
 627 # them (e.g., test.h is using completely pattern), that it's worth just
 628 # explicitly defining all the rules explicitly.
 629 verifier/tests.h: verifier/*.c
 630         $(shell ( cd verifier/; \
 631                   echo '/* Generated header, do not edit */'; \
 632                   echo '#ifdef FILL_ARRAY'; \
 633                   ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \
 634                   echo '#endif' \
 635                 ) > verifier/tests.h)
 636 $(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
 637         $(call msg,BINARY,,$@)
 638         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 639
 640 $(OUTPUT)/xskxceiver: xskxceiver.c xskxceiver.h $(OUTPUT)/xsk.o $(OUTPUT)/xsk_xdp_progs.skel.h $(BPFOBJ) | $(OUTPUT)
 641         $(call msg,BINARY,,$@)
 642         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 643
 644 $(OUTPUT)/xdp_hw_metadata: xdp_hw_metadata.c $(OUTPUT)/network_helpers.o $(OUTPUT)/xsk.o $(OUTPUT)/xdp_hw_metadata.skel.h | $(OUTPUT)
 645         $(call msg,BINARY,,$@)
 646         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 647
 648 $(OUTPUT)/xdp_features: xdp_features.c $(OUTPUT)/network_helpers.o $(OUTPUT)/xdp_features.skel.h | $(OUTPUT)
 649         $(call msg,BINARY,,$@)
 650         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 651
 652 # Make sure we are able to include and link libbpf against c++.
 653 $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
 654         $(call msg,CXX,,$@)
 655         $(Q)$(CXX) $(CFLAGS) $(filter %.a %.o %.cpp,$^) $(LDLIBS) -o $@
 656
 657 # Benchmark runner
 658 $(OUTPUT)/bench_%.o: benchs/bench_%.c bench.h $(BPFOBJ)
 659         $(call msg,CC,,$@)
 660         $(Q)$(CC) $(CFLAGS) -O2 -c $(filter %.c,$^) $(LDLIBS) -o $@
 661 $(OUTPUT)/bench_rename.o: $(OUTPUT)/test_overhead.skel.h
 662 $(OUTPUT)/bench_trigger.o: $(OUTPUT)/trigger_bench.skel.h
 663 $(OUTPUT)/bench_ringbufs.o: $(OUTPUT)/ringbuf_bench.skel.h \
 664                             $(OUTPUT)/perfbuf_bench.skel.h
 665 $(OUTPUT)/bench_bloom_filter_map.o: $(OUTPUT)/bloom_filter_bench.skel.h
 666 $(OUTPUT)/bench_bpf_loop.o: $(OUTPUT)/bpf_loop_bench.skel.h
 667 $(OUTPUT)/bench_strncmp.o: $(OUTPUT)/strncmp_bench.skel.h
 668 $(OUTPUT)/bench_bpf_hashmap_full_update.o: $(OUTPUT)/bpf_hashmap_full_update_bench.skel.h
 669 $(OUTPUT)/bench_local_storage.o: $(OUTPUT)/local_storage_bench.skel.h
 670 $(OUTPUT)/bench_local_storage_rcu_tasks_trace.o: $(OUTPUT)/local_storage_rcu_tasks_trace_bench.skel.h
 671 $(OUTPUT)/bench_local_storage_create.o: $(OUTPUT)/bench_local_storage_create.skel.h
 672 $(OUTPUT)/bench_bpf_hashmap_lookup.o: $(OUTPUT)/bpf_hashmap_lookup.skel.h
 673 $(OUTPUT)/bench_htab_mem.o: $(OUTPUT)/htab_mem_bench.skel.h
 674 $(OUTPUT)/bench.o: bench.h testing_helpers.h $(BPFOBJ)
 675 $(OUTPUT)/bench: LDLIBS += -lm
 676 $(OUTPUT)/bench: $(OUTPUT)/bench.o \
 677                  $(TESTING_HELPERS) \
 678                  $(TRACE_HELPERS) \
 679                  $(CGROUP_HELPERS) \
 680                  $(OUTPUT)/bench_count.o \
 681                  $(OUTPUT)/bench_rename.o \
 682                  $(OUTPUT)/bench_trigger.o \
 683                  $(OUTPUT)/bench_ringbufs.o \
 684                  $(OUTPUT)/bench_bloom_filter_map.o \
 685                  $(OUTPUT)/bench_bpf_loop.o \
 686                  $(OUTPUT)/bench_strncmp.o \
 687                  $(OUTPUT)/bench_bpf_hashmap_full_update.o \
 688                  $(OUTPUT)/bench_local_storage.o \
 689                  $(OUTPUT)/bench_local_storage_rcu_tasks_trace.o \
 690                  $(OUTPUT)/bench_bpf_hashmap_lookup.o \
 691                  $(OUTPUT)/bench_local_storage_create.o \
 692                  $(OUTPUT)/bench_htab_mem.o \
 693                  #
 694         $(call msg,BINARY,,$@)
 695         $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@
 696
 697 $(OUTPUT)/veristat.o: $(BPFOBJ)
 698 $(OUTPUT)/veristat: $(OUTPUT)/veristat.o
 699         $(call msg,BINARY,,$@)
 700         $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@
 701
 702 $(OUTPUT)/uprobe_multi: uprobe_multi.c
 703         $(call msg,BINARY,,$@)
 704         $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
 705
 706 EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR)  \
 707         prog_tests/tests.h map_tests/tests.h verifier/tests.h           \
 708         feature bpftool                                                 \
 709         $(addprefix $(OUTPUT)/,*.o *.skel.h *.lskel.h *.subskel.h       \
 710                                no_alu32 cpuv4 bpf_gcc bpf_testmod.ko    \
 711                                liburandom_read.so)
 712
 713 .PHONY: docs docs-clean
 714
 715 # Delete partially updated (corrupted) files on error
 716 .DELETE_ON_ERROR: