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 GENDIR := $(abspath ../../../../include/generated)
  16 GENHDR := $(GENDIR)/autoconf.h
  17
  18 ifneq ($(wildcard $(GENHDR)),)
  19   GENFLAGS := -DHAVE_GENHDR
  20 endif
  21
  22 BPF_GCC         ?= $(shell command -v bpf-gcc;)
  23 SAN_CFLAGS      ?=
  24 CFLAGS += -g -O0 -rdynamic -Wall $(GENFLAGS) $(SAN_CFLAGS)              \
  25           -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)          \
  26           -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT)                      \
  27           -Dbpf_prog_load=bpf_prog_test_load                            \
  28           -Dbpf_load_program=bpf_test_load_program
  29 LDLIBS += -lcap -lelf -lz -lrt -lpthread
  30
  31 # Silence some warnings when compiled with clang
  32 ifneq ($(LLVM),)
  33 CFLAGS += -Wno-unused-command-line-argument
  34 endif
  35
  36 # Order correspond to 'make run_tests' order
  37 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
  38         test_verifier_log test_dev_cgroup \
  39         test_sock test_sockmap get_cgroup_id_user \
  40         test_cgroup_storage \
  41         test_tcpnotify_user test_sysctl \
  42         test_progs-no_alu32
  43
  44 # Also test bpf-gcc, if present
  45 ifneq ($(BPF_GCC),)
  46 TEST_GEN_PROGS += test_progs-bpf_gcc
  47 endif
  48
  49 TEST_GEN_FILES = test_lwt_ip_encap.o \
  50         test_tc_edt.o
  51 TEST_FILES = xsk_prereqs.sh \
  52         $(wildcard progs/btf_dump_test_case_*.c)
  53
  54 # Order correspond to 'make run_tests' order
  55 TEST_PROGS := test_kmod.sh \
  56         test_xdp_redirect.sh \
  57         test_xdp_redirect_multi.sh \
  58         test_xdp_meta.sh \
  59         test_xdp_veth.sh \
  60         test_offload.py \
  61         test_sock_addr.sh \
  62         test_tunnel.sh \
  63         test_lwt_seg6local.sh \
  64         test_lirc_mode2.sh \
  65         test_skb_cgroup_id.sh \
  66         test_flow_dissector.sh \
  67         test_xdp_vlan_mode_generic.sh \
  68         test_xdp_vlan_mode_native.sh \
  69         test_lwt_ip_encap.sh \
  70         test_tcp_check_syncookie.sh \
  71         test_tc_tunnel.sh \
  72         test_tc_edt.sh \
  73         test_xdping.sh \
  74         test_bpftool_build.sh \
  75         test_bpftool.sh \
  76         test_bpftool_metadata.sh \
  77         test_doc_build.sh \
  78         test_xsk.sh
  79
  80 TEST_PROGS_EXTENDED := with_addr.sh \
  81         with_tunnels.sh \
  82         test_xdp_vlan.sh test_bpftool.py
  83
  84 # Compile but not part of 'make run_tests'
  85 TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
  86         flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
  87         test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
  88         xdpxceiver xdp_redirect_multi
  89
  90 TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
  91
  92 # Emit succinct information message describing current building step
  93 # $1 - generic step name (e.g., CC, LINK, etc);
  94 # $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
  95 # $3 - target (assumed to be file); only file name will be emitted;
  96 # $4 - optional extra arg, emitted as-is, if provided.
  97 ifeq ($(V),1)
  98 Q =
  99 msg =
 100 else
 101 Q = @
 102 msg = @printf '  %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
 103 MAKEFLAGS += --no-print-directory
 104 submake_extras := feature_display=0
 105 endif
 106
 107 # override lib.mk's default rules
 108 OVERRIDE_TARGETS := 1
 109 override define CLEAN
 110         $(call msg,CLEAN)
 111         $(Q)$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
 112         $(Q)$(MAKE) -C bpf_testmod clean
 113         $(Q)$(MAKE) docs-clean
 114 endef
 115
 116 include ../lib.mk
 117
 118 SCRATCH_DIR := $(OUTPUT)/tools
 119 BUILD_DIR := $(SCRATCH_DIR)/build
 120 INCLUDE_DIR := $(SCRATCH_DIR)/include
 121 BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
 122 ifneq ($(CROSS_COMPILE),)
 123 HOST_BUILD_DIR          := $(BUILD_DIR)/host
 124 HOST_SCRATCH_DIR        := $(OUTPUT)/host-tools
 125 else
 126 HOST_BUILD_DIR          := $(BUILD_DIR)
 127 HOST_SCRATCH_DIR        := $(SCRATCH_DIR)
 128 endif
 129 HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
 130 RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
 131
 132 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 133                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 134                      ../../../../vmlinux                                \
 135                      /sys/kernel/btf/vmlinux                            \
 136                      /boot/vmlinux-$(shell uname -r)
 137 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 138 ifeq ($(VMLINUX_BTF),)
 139 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
 140 endif
 141
 142 # Define simple and short `make test_progs`, `make test_sysctl`, etc targets
 143 # to build individual tests.
 144 # NOTE: Semicolon at the end is critical to override lib.mk's default static
 145 # rule for binaries.
 146 $(notdir $(TEST_GEN_PROGS)                                              \
 147          $(TEST_PROGS)                                                  \
 148          $(TEST_PROGS_EXTENDED)                                         \
 149          $(TEST_GEN_PROGS_EXTENDED)                                     \
 150          $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ;
 151
 152 # sort removes libbpf duplicates when not cross-building
 153 MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf               \
 154                $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids      \
 155                $(INCLUDE_DIR))
 156 $(MAKE_DIRS):
 157         $(call msg,MKDIR,,$@)
 158         $(Q)mkdir -p $@
 159
 160 $(OUTPUT)/%.o: %.c
 161         $(call msg,CC,,$@)
 162         $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
 163
 164 $(OUTPUT)/%:%.c
 165         $(call msg,BINARY,,$@)
 166         $(Q)$(LINK.c) $^ $(LDLIBS) -o $@
 167
 168 $(OUTPUT)/urandom_read: urandom_read.c
 169         $(call msg,BINARY,,$@)
 170         $(Q)$(CC) $(LDFLAGS) -o $@ $< $(LDLIBS) -Wl,--build-id=sha1
 171
 172 $(OUTPUT)/bpf_testmod.ko: $(VMLINUX_BTF) $(wildcard bpf_testmod/Makefile bpf_testmod/*.[ch])
 173         $(call msg,MOD,,$@)
 174         $(Q)$(RM) bpf_testmod/bpf_testmod.ko # force re-compilation
 175         $(Q)$(MAKE) $(submake_extras) -C bpf_testmod
 176         $(Q)cp bpf_testmod/bpf_testmod.ko $@
 177
 178 $(OUTPUT)/test_stub.o: test_stub.c $(BPFOBJ)
 179         $(call msg,CC,,$@)
 180         $(Q)$(CC) -c $(CFLAGS) -o $@ $<
 181
 182 DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
 183
 184 $(OUTPUT)/runqslower: $(BPFOBJ) | $(DEFAULT_BPFTOOL)
 185         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower     \
 186                     OUTPUT=$(SCRATCH_DIR)/ VMLINUX_BTF=$(VMLINUX_BTF)   \
 187                     BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR) &&      \
 188                     cp $(SCRATCH_DIR)/runqslower $@
 189
 190 TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL)
 191
 192 $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(BPFOBJ)
 193
 194 $(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
 195 $(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
 196 $(OUTPUT)/test_sock: cgroup_helpers.c
 197 $(OUTPUT)/test_sock_addr: cgroup_helpers.c
 198 $(OUTPUT)/test_sockmap: cgroup_helpers.c
 199 $(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c
 200 $(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
 201 $(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
 202 $(OUTPUT)/test_sock_fields: cgroup_helpers.c
 203 $(OUTPUT)/test_sysctl: cgroup_helpers.c
 204
 205 BPFTOOL ?= $(DEFAULT_BPFTOOL)
 206 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
 207                     $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
 208         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                        \
 209                     CC=$(HOSTCC) LD=$(HOSTLD)                                  \
 210                     EXTRA_CFLAGS='-g -O0'                                      \
 211                     OUTPUT=$(HOST_BUILD_DIR)/bpftool/                          \
 212                     prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install
 213
 214 all: docs
 215
 216 docs:
 217         $(Q)RST2MAN_OPTS="--exit-status=1" $(MAKE) $(submake_extras)    \
 218                     -f Makefile.docs                                    \
 219                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 220
 221 docs-clean:
 222         $(Q)$(MAKE) $(submake_extras)                                   \
 223                     -f Makefile.docs                                    \
 224                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 225
 226 $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                     \
 227            ../../../include/uapi/linux/bpf.h                                   \
 228            | $(INCLUDE_DIR) $(BUILD_DIR)/libbpf
 229         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
 230                     EXTRA_CFLAGS='-g -O0'                                      \
 231                     DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
 232
 233 ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
 234 $(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                \
 235            ../../../include/uapi/linux/bpf.h                                   \
 236            | $(INCLUDE_DIR) $(HOST_BUILD_DIR)/libbpf
 237         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR)                             \
 238                     EXTRA_CFLAGS='-g -O0'                                      \
 239                     OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \
 240                     DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
 241 endif
 242
 243 $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
 244 ifeq ($(VMLINUX_H),)
 245         $(call msg,GEN,,$@)
 246         $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
 247 else
 248         $(call msg,CP,,$@)
 249         $(Q)cp "$(VMLINUX_H)" $@
 250 endif
 251
 252 $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids    \
 253                        $(TOOLSDIR)/bpf/resolve_btfids/main.c    \
 254                        $(TOOLSDIR)/lib/rbtree.c                 \
 255                        $(TOOLSDIR)/lib/zalloc.c                 \
 256                        $(TOOLSDIR)/lib/string.c                 \
 257                        $(TOOLSDIR)/lib/ctype.c                  \
 258                        $(TOOLSDIR)/lib/str_error_r.c
 259         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \
 260                 CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \
 261                 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
 262
 263 # Get Clang's default includes on this system, as opposed to those seen by
 264 # '-target bpf'. This fixes "missing" files on some architectures/distros,
 265 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
 266 #
 267 # Use '-idirafter': Don't interfere with include mechanics except where the
 268 # build would have failed anyways.
 269 define get_sys_includes
 270 $(shell $(1) -v -E - </dev/null 2>&1 \
 271         | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
 272 $(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
 273 endef
 274
 275 # Determine target endianness.
 276 IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
 277                         grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
 278 MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
 279
 280 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
 281 BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN)                   \
 282              -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR)                   \
 283              -I$(abspath $(OUTPUT)/../usr/include)
 284
 285 CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
 286                -Wno-compare-distinct-pointer-types
 287
 288 $(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline
 289 $(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline
 290
 291 $(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
 292
 293 # Build BPF object using Clang
 294 # $1 - input .c file
 295 # $2 - output .o file
 296 # $3 - CFLAGS
 297 define CLANG_BPF_BUILD_RULE
 298         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 299         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -o $2 -mcpu=v3
 300 endef
 301 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
 302 define CLANG_NOALU32_BPF_BUILD_RULE
 303         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 304         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -o $2 -mcpu=v2
 305 endef
 306 # Build BPF object using GCC
 307 define GCC_BPF_BUILD_RULE
 308         $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
 309         $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
 310 endef
 311
 312 SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
 313
 314 LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h           \
 315                 linked_vars.skel.h linked_maps.skel.h
 316
 317 LSKELS := kfunc_call_test.c fentry_test.c fexit_test.c fexit_sleep.c \
 318         test_ksyms_module.c test_ringbuf.c atomics.c trace_printk.c
 319 SKEL_BLACKLIST += $$(LSKELS)
 320
 321 test_static_linked.skel.h-deps := test_static_linked1.o test_static_linked2.o
 322 linked_funcs.skel.h-deps := linked_funcs1.o linked_funcs2.o
 323 linked_vars.skel.h-deps := linked_vars1.o linked_vars2.o
 324 linked_maps.skel.h-deps := linked_maps1.o linked_maps2.o
 325
 326 LINKED_BPF_SRCS := $(patsubst %.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
 327
 328 # Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on
 329 # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
 330 # Parameters:
 331 # $1 - test runner base binary name (e.g., test_progs)
 332 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 333 define DEFINE_TEST_RUNNER
 334
 335 TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2
 336 TRUNNER_BINARY := $1$(if $2,-)$2
 337 TRUNNER_TEST_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.test.o,       \
 338                                  $$(notdir $$(wildcard $(TRUNNER_TESTS_DIR)/*.c)))
 339 TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,           \
 340                                  $$(filter %.c,$(TRUNNER_EXTRA_SOURCES)))
 341 TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
 342 TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
 343 TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
 344 TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, $$(TRUNNER_BPF_SRCS))
 345 TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,       \
 346                                  $$(filter-out $(SKEL_BLACKLIST) $(LINKED_BPF_SRCS),\
 347                                                $$(TRUNNER_BPF_SRCS)))
 348 TRUNNER_BPF_LSKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.lskel.h, $$(LSKELS))
 349 TRUNNER_BPF_SKELS_LINKED := $$(addprefix $$(TRUNNER_OUTPUT)/,$(LINKED_SKELS))
 350 TEST_GEN_FILES += $$(TRUNNER_BPF_OBJS)
 351
 352 # Evaluate rules now with extra TRUNNER_XXX variables above already defined
 353 $$(eval $$(call DEFINE_TEST_RUNNER_RULES,$1,$2))
 354
 355 endef
 356
 357 # Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and
 358 # set up by DEFINE_TEST_RUNNER itself, create test runner build rules with:
 359 # $1 - test runner base binary name (e.g., test_progs)
 360 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 361 define DEFINE_TEST_RUNNER_RULES
 362
 363 ifeq ($($(TRUNNER_OUTPUT)-dir),)
 364 $(TRUNNER_OUTPUT)-dir := y
 365 $(TRUNNER_OUTPUT):
 366         $$(call msg,MKDIR,,$$@)
 367         $(Q)mkdir -p $$@
 368 endif
 369
 370 # ensure we set up BPF objects generation rule just once for a given
 371 # input/output directory combination
 372 ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),)
 373 $(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
 374 $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o:                             \
 375                      $(TRUNNER_BPF_PROGS_DIR)/%.c                       \
 376                      $(TRUNNER_BPF_PROGS_DIR)/*.h                       \
 377                      $$(INCLUDE_DIR)/vmlinux.h                          \
 378                      $(wildcard $(BPFDIR)/bpf_*.h) | $(TRUNNER_OUTPUT)
 379         $$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,                      \
 380                                           $(TRUNNER_BPF_CFLAGS))
 381
 382 $(TRUNNER_BPF_SKELS): %.skel.h: %.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 383         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 384         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
 385         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
 386         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
 387         $(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
 388         $(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.o=)) > $$@
 389
 390 $(TRUNNER_BPF_LSKELS): %.lskel.h: %.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 391         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 392         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
 393         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
 394         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
 395         $(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
 396         $(Q)$$(BPFTOOL) gen skeleton -L $$(<:.o=.linked3.o) name $$(notdir $$(<:.o=)) > $$@
 397
 398 $(TRUNNER_BPF_SKELS_LINKED): $(TRUNNER_BPF_OBJS) $(BPFTOOL) | $(TRUNNER_OUTPUT)
 399         $$(call msg,LINK-BPF,$(TRUNNER_BINARY),$$(@:.skel.h=.o))
 400         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked1.o) $$(addprefix $(TRUNNER_OUTPUT)/,$$($$(@F)-deps))
 401         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked1.o)
 402         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked3.o) $$(@:.skel.h=.linked2.o)
 403         $(Q)diff $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked3.o)
 404         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 405         $(Q)$$(BPFTOOL) gen skeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$@
 406 endif
 407
 408 # ensure we set up tests.h header generation rule just once
 409 ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)
 410 $(TRUNNER_TESTS_DIR)-tests-hdr := y
 411 $(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c
 412         $$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)
 413         $$(shell ( cd $(TRUNNER_TESTS_DIR);                             \
 414                   echo '/* Generated header, do not edit */';           \
 415                   ls *.c 2> /dev/null |                                 \
 416                         sed -e 's@\([^\.]*\)\.c@DEFINE_TEST(\1)@';      \
 417                  ) > $$@)
 418 endif
 419
 420 # compile individual test files
 421 # Note: we cd into output directory to ensure embedded BPF object is found
 422 $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o:                       \
 423                       $(TRUNNER_TESTS_DIR)/%.c                          \
 424                       $(TRUNNER_EXTRA_HDRS)                             \
 425                       $(TRUNNER_BPF_OBJS)                               \
 426                       $(TRUNNER_BPF_SKELS)                              \
 427                       $(TRUNNER_BPF_LSKELS)                             \
 428                       $(TRUNNER_BPF_SKELS_LINKED)                       \
 429                       $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 430         $$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
 431         $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
 432
 433 $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:                           \
 434                        %.c                                              \
 435                        $(TRUNNER_EXTRA_HDRS)                            \
 436                        $(TRUNNER_TESTS_HDR)                             \
 437                        $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 438         $$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@)
 439         $(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
 440
 441 # non-flavored in-srctree builds receive special treatment, in particular, we
 442 # do not need to copy extra resources (see e.g. test_btf_dump_case())
 443 $(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT)
 444 ifneq ($2:$(OUTPUT),:$(shell pwd))
 445         $$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
 446         $(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/
 447 endif
 448
 449 $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS)                       \
 450                              $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ)           \
 451                              $(RESOLVE_BTFIDS)                          \
 452                              | $(TRUNNER_BINARY)-extras
 453         $$(call msg,BINARY,,$$@)
 454         $(Q)$$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@
 455         $(Q)$(RESOLVE_BTFIDS) --no-fail --btf $(TRUNNER_OUTPUT)/btf_data.o $$@
 456
 457 endef
 458
 459 # Define test_progs test runner.
 460 TRUNNER_TESTS_DIR := prog_tests
 461 TRUNNER_BPF_PROGS_DIR := progs
 462 TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c  \
 463                          network_helpers.c testing_helpers.c            \
 464                          btf_helpers.c  flow_dissector_load.h
 465 TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko  \
 466                        ima_setup.sh                                     \
 467                        $(wildcard progs/btf_dump_test_case_*.c)
 468 TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
 469 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 470 TRUNNER_BPF_CFLAGS += -DENABLE_ATOMICS_TESTS
 471 $(eval $(call DEFINE_TEST_RUNNER,test_progs))
 472
 473 # Define test_progs-no_alu32 test runner.
 474 TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE
 475 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 476 $(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32))
 477
 478 # Define test_progs BPF-GCC-flavored test runner.
 479 ifneq ($(BPF_GCC),)
 480 TRUNNER_BPF_BUILD_RULE := GCC_BPF_BUILD_RULE
 481 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(call get_sys_includes,gcc)
 482 $(eval $(call DEFINE_TEST_RUNNER,test_progs,bpf_gcc))
 483 endif
 484
 485 # Define test_maps test runner.
 486 TRUNNER_TESTS_DIR := map_tests
 487 TRUNNER_BPF_PROGS_DIR := progs
 488 TRUNNER_EXTRA_SOURCES := test_maps.c
 489 TRUNNER_EXTRA_FILES :=
 490 TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
 491 TRUNNER_BPF_CFLAGS :=
 492 $(eval $(call DEFINE_TEST_RUNNER,test_maps))
 493
 494 # Define test_verifier test runner.
 495 # It is much simpler than test_maps/test_progs and sufficiently different from
 496 # them (e.g., test.h is using completely pattern), that it's worth just
 497 # explicitly defining all the rules explicitly.
 498 verifier/tests.h: verifier/*.c
 499         $(shell ( cd verifier/; \
 500                   echo '/* Generated header, do not edit */'; \
 501                   echo '#ifdef FILL_ARRAY'; \
 502                   ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \
 503                   echo '#endif' \
 504                 ) > verifier/tests.h)
 505 $(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
 506         $(call msg,BINARY,,$@)
 507         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 508
 509 # Make sure we are able to include and link libbpf against c++.
 510 $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
 511         $(call msg,CXX,,$@)
 512         $(Q)$(CXX) $(CFLAGS) $(filter %.a %.o %.cpp,$^) $(LDLIBS) -o $@
 513
 514 # Benchmark runner
 515 $(OUTPUT)/bench_%.o: benchs/bench_%.c bench.h
 516         $(call msg,CC,,$@)
 517         $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
 518 $(OUTPUT)/bench_rename.o: $(OUTPUT)/test_overhead.skel.h
 519 $(OUTPUT)/bench_trigger.o: $(OUTPUT)/trigger_bench.skel.h
 520 $(OUTPUT)/bench_ringbufs.o: $(OUTPUT)/ringbuf_bench.skel.h \
 521                             $(OUTPUT)/perfbuf_bench.skel.h
 522 $(OUTPUT)/bench.o: bench.h testing_helpers.h
 523 $(OUTPUT)/bench: LDLIBS += -lm
 524 $(OUTPUT)/bench: $(OUTPUT)/bench.o $(OUTPUT)/testing_helpers.o \
 525                  $(OUTPUT)/bench_count.o \
 526                  $(OUTPUT)/bench_rename.o \
 527                  $(OUTPUT)/bench_trigger.o \
 528                  $(OUTPUT)/bench_ringbufs.o
 529         $(call msg,BINARY,,$@)
 530         $(Q)$(CC) $(LDFLAGS) -o $@ $(filter %.a %.o,$^) $(LDLIBS)
 531
 532 EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR)  \
 533         prog_tests/tests.h map_tests/tests.h verifier/tests.h           \
 534         feature                                                         \
 535         $(addprefix $(OUTPUT)/,*.o *.skel.h *.lskel.h no_alu32 bpf_gcc bpf_testmod.ko)
 536
 537 .PHONY: docs docs-clean