# SPDX-License-Identifier: GPL-2.0 include ../../../build/Build.include include ../../../scripts/Makefile.arch include ../../../scripts/Makefile.include
# Some utility functions use LLVM libraries
jit_disasm_helpers.c-CFLAGS = $(LLVM_CFLAGS)
ifneq ($(LLVM),) # Silence some warnings when compiled with clang
CFLAGS += -Wno-unused-command-line-argument endif
# Check whether bpf cpu=v4 is supported or not by clang ifneq ($(shell $(CLANG) --target=bpf -mcpu=help 2>&1 | grep 'v4'),)
CLANG_CPUV4 := 1 endif
# Order correspond to 'make run_tests' order
TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_progs \
test_sockmap \
test_tcpnotify_user \
test_progs-no_alu32
TEST_INST_SUBDIRS := no_alu32
# Also test bpf-gcc, if present ifneq ($(BPF_GCC),)
TEST_GEN_PROGS += test_progs-bpf_gcc
TEST_INST_SUBDIRS += bpf_gcc
# The following tests contain C code that, although technically legal, # triggers GCC warnings that cannot be disabled: declaration of # anonymous struct types in function parameter lists.
progs/btf_dump_test_case_bitfields.c-bpf_gcc-CFLAGS := -Wno-error
progs/btf_dump_test_case_namespacing.c-bpf_gcc-CFLAGS := -Wno-error
progs/btf_dump_test_case_packing.c-bpf_gcc-CFLAGS := -Wno-error
progs/btf_dump_test_case_padding.c-bpf_gcc-CFLAGS := -Wno-error
progs/btf_dump_test_case_syntax.c-bpf_gcc-CFLAGS := -Wno-error
VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \
$(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \
../../../../vmlinux \
/sys/kernel/btf/vmlinux \
/boot/vmlinux-$(shell uname -r)
VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) ifeq ($(VMLINUX_BTF),)
$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)") endif
# Define simple and short `make test_progs`, `make test_maps`, etc targets # to build individual tests. # NOTE: Semicolon at the end is critical to override lib.mk's default static # rule for binaries.
$(notdir $(TEST_GEN_PROGS) $(TEST_KMODS) \
$(TEST_GEN_PROGS_EXTENDED)): %: $(OUTPUT)/% ;
# LLVM's ld.lld doesn't support all the architectures, so use it only on x86 ifeq ($(SRCARCH),$(filter $(SRCARCH),x86 riscv))
LLD := lld else
LLD := $(shell command -v $(LD)) endif
# Filter out -static for liburandom_read.so and its dependent targets so that static builds # do not fail. Static builds leave urandom_read relying on system-wide shared libraries.
$(OUTPUT)/liburandom_read.so: urandom_read_lib1.c urandom_read_lib2.c liburandom_read.map
$(call msg,LIB,,$@)
$(Q)$(CLANG) $(CLANG_TARGET_ARCH) \
$(filter-out -static,$(CFLAGS) $(LDFLAGS)) \
$(filter %.c,$^) $(filter-out -static,$(LDLIBS)) \
-Wno-unused-command-line-argument \
-fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
-Wl,--version-script=liburandom_read.map \
-fPIC -shared -o $@
# This should really be a grouped target, but make versions before 4.3 don't # support that for regular rules. However, pattern matching rules are implicitly # treated as grouped even with older versions of make, so as a workaround, the # subst() turns the rule into a pattern matching rule
$(addprefix test_kmods/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/*.[ch])
$(Q)$(RM) test_kmods/*.ko test_kmods/*.mod.o # force re-compilation
$(Q)$(MAKE) $(submake_extras) -C test_kmods \
RESOLVE_BTFIDS=$(RESOLVE_BTFIDS) \
EXTRA_CFLAGS='' EXTRA_LDFLAGS=''
# vmlinux.h is first dumped to a temporary file and then compared to # the previous version. This helps to avoid unnecessary re-builds of # $(TRUNNER_BPF_OBJS)
$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) ifeq ($(VMLINUX_H),)
$(call msg,GEN,,$@)
$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $(INCLUDE_DIR)/.vmlinux.h.tmp
$(Q)cmp -s $(INCLUDE_DIR)/.vmlinux.h.tmp $@ || mv $(INCLUDE_DIR)/.vmlinux.h.tmp $@ else
$(call msg,CP,,$@)
$(Q)cp"$(VMLINUX_H)" $@ endif
# Generate both light skeleton and libbpf skeleton for these
LSKELS_EXTRA := test_ksyms_module.c test_ksyms_weak.c kfunc_call_test.c \
kfunc_call_test_subprog.c
SKEL_BLACKLIST += $$(LSKELS)
test_static_linked.skel.h-deps := test_static_linked1.bpf.o test_static_linked2.bpf.o
linked_funcs.skel.h-deps := linked_funcs1.bpf.o linked_funcs2.bpf.o
linked_vars.skel.h-deps := linked_vars1.bpf.o linked_vars2.bpf.o
linked_maps.skel.h-deps := linked_maps1.bpf.o linked_maps2.bpf.o # In the subskeleton case, we want the test_subskeleton_lib.subskel.h file # but that's created as a side-effect of the skel.h generation.
test_subskeleton.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o test_subskeleton.bpf.o
test_subskeleton_lib.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o
test_usdt.skel.h-deps := test_usdt.bpf.o test_usdt_multispec.bpf.o
xsk_xdp_progs.skel.h-deps := xsk_xdp_progs.bpf.o
xdp_hw_metadata.skel.h-deps := xdp_hw_metadata.bpf.o
xdp_features.skel.h-deps := xdp_features.bpf.o
# Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES. # Parameters: # $1 - test runner base binary name (e.g., test_progs) # $2 - test runner extra "flavor" (e.g., no_alu32, cpuv4, bpf_gcc, etc) define DEFINE_TEST_RUNNER
# Evaluate rules now with extra TRUNNER_XXX variables above already defined
$$(eval $$(call DEFINE_TEST_RUNNER_RULES,$1,$2))
endef
# Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and # set up by DEFINE_TEST_RUNNER itself, create test runner build rules with: # $1 - test runner base binary name (e.g., test_progs) # $2 - test runner extra "flavor" (e.g., no_alu32, cpuv4, bpf_gcc, etc) define DEFINE_TEST_RUNNER_RULES
# ensure we set up BPF objects generation rule just once for a given # input/output directory combination ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),)
$(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
$(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.bpf.o: \
$(TRUNNER_BPF_PROGS_DIR)/%.c \
$(TRUNNER_BPF_PROGS_DIR)/*.h \
$$(INCLUDE_DIR)/vmlinux.h \
$(HEADERS_FOR_BPF_OBJS) \
| $(TRUNNER_OUTPUT) $$(BPFOBJ)
$$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@, \
$(TRUNNER_BPF_CFLAGS) \
$$($$<-CFLAGS) \
$$($$<-$2-CFLAGS),$(TRUNNER_BINARY))
$(TRUNNER_BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
$$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
$(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
$(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
$(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
$(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
$(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$@
$(Q)$$(BPFTOOL) gen subskeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$(@:.skel.h=.subskel.h)
$(Q)rm -f $$(<:.o=.linked1.o) $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
$(TRUNNER_BPF_LSKELS): %.lskel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
$$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
$(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked1.o) $$<
$(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked2.o) $$(<:.o=.llinked1.o)
$(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked3.o) $$(<:.o=.llinked2.o)
$(Q)diff $$(<:.o=.llinked2.o) $$(<:.o=.llinked3.o)
$(Q)$$(BPFTOOL) gen skeleton -L $$(<:.o=.llinked3.o) name $$(notdir $$(<:.bpf.o=_lskel)) > $$@
$(Q)rm -f $$(<:.o=.llinked1.o) $$(<:.o=.llinked2.o) $$(<:.o=.llinked3.o)
$(LINKED_BPF_OBJS): %: $(TRUNNER_OUTPUT)/%
# .SECONDEXPANSION here allows to correctly expand %-deps variables as prerequisites
.SECONDEXPANSION:
$(TRUNNER_BPF_SKELS_LINKED): $(TRUNNER_OUTPUT)/%: $$$$(%-deps) $(BPFTOOL) | $(TRUNNER_OUTPUT)
$$(call msg,LINK-BPF,$(TRUNNER_BINARY),$$(@:.skel.h=.bpf.o))
$(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked1.o) $$(addprefix $(TRUNNER_OUTPUT)/,$$($$(@F)-deps))
$(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked1.o)
$(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked3.o) $$(@:.skel.h=.linked2.o)
$(Q)diff $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked3.o)
$$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
$(Q)$$(BPFTOOL) gen skeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$@
$(Q)$$(BPFTOOL) gen subskeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$(@:.skel.h=.subskel.h)
$(Q)rm -f $$(@:.skel.h=.linked1.o) $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked3.o)
# When the compiler generates a %.d file, only skel basenames (not # full paths) are specified as prerequisites for corresponding %.o # file. vpath directives below instruct make to search for skel files # in TRUNNER_OUTPUT, if they are not present in the working directory.
vpath %.skel.h $(TRUNNER_OUTPUT)
vpath %.lskel.h $(TRUNNER_OUTPUT)
vpath %.subskel.h $(TRUNNER_OUTPUT)
endif
# ensure we set up tests.h header generation rule just once ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)
$(TRUNNER_TESTS_DIR)-tests-hdr := y
$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c
$$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)
$$(shell (echo'/* Generated header, do not edit */'; \
sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\((void)?\).*/DEFINE_TEST(\2)/p' \
$(TRUNNER_TESTS_DIR)/*.c | sort ; \
) > $$@) endif
# compile individual test files # Note: we cd into output directory to ensure embedded BPF object is found
$(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o: \
$(TRUNNER_TESTS_DIR)/%.c \
| $(TRUNNER_OUTPUT)/%.test.d
$$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
$(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -MMD -MT $$@ -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
# non-flavored in-srctree builds receive special treatment, in particular, we # do not need to copy extra resources (see e.g. test_btf_dump_case())
$(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT) ifneq ($2:$(OUTPUT),:$(shell pwd))
$$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
$(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/ endif
# some X.test.o files have runtime dependencies on Y.bpf.o files
$(OUTPUT)/$(TRUNNER_BINARY): | $(TRUNNER_BPF_OBJS)
# Define test_maps test runner.
TRUNNER_TESTS_DIR := map_tests
TRUNNER_BPF_PROGS_DIR := progs
TRUNNER_EXTRA_SOURCES := test_maps.c
TRUNNER_EXTRA_FILES :=
TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
TRUNNER_BPF_CFLAGS :=
$(eval $(call DEFINE_TEST_RUNNER,test_maps))
# Define test_verifier test runner. # It is much simpler than test_maps/test_progs and sufficiently different from # them (e.g., test.h is using completely pattern), that it's worth just # explicitly defining all the rules explicitly.
verifier/tests.h: verifier/*.c
$(shell ( cd verifier/; \ echo'/* Generated header, do not edit */'; \ echo'#ifdef FILL_ARRAY'; \
ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \ echo'#endif' \
) > verifier/tests.h)
$(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
$(call msg,BINARY,,$@)
$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
# Make sure we are able to include and link libbpf against c++.
CXXFLAGS += $(CFLAGS)
CXXFLAGS := $(subst -D_GNU_SOURCE=,,$(CXXFLAGS))
CXXFLAGS := $(subst -std=gnu11,-std=gnu++11,$(CXXFLAGS))
$(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
$(call msg,CXX,,$@)
$(Q)$(CXX) $(CXXFLAGS) $(filter %.a %.o %.cpp,$^) $(LDLIBS) -o $@
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