[PATCH bpf-next v7 8/9] selftests/bpf: move shared build definitions into Makefile.buildvars
Mykola Lysenko <[email protected]>
| Newsgroups | org.kernel.vger.bpf |
|---|---|
| Message-ID | <[email protected]> |
Move the build definitions a test runner needs - tree layout and tool locations, flag assembly, feature probes, signing key paths, the permissive-mode helpers - into Makefile.buildvars, in their current order, as preparation for building each test runner instance in its own sub-make: the definitions become includable by more than one makefile. No rules or recipes are changed. The include sits directly after ../lib.mk, ahead of the ../../../build/Makefile.feature evaluation, so the definitions are in place for everything the top Makefile parses afterwards - in particular the LLVM feature probe captures srctree and PKG_CONFIG from their new location, and the top Makefile's remaining uses of both are all recipe-time expansions. Two evaluation-time changes follow from the new position and a third is made on the way, each commented in place: CFLAGS and LDFLAGS are reassembled around a snapshot taken before lib.mk, keeping the pre-split order; CLANG_SYS_INCLUDES becomes an immediate assignment (its inputs are final by this point, and expanding it forks shells); and the CLANG_HAS_ARENA_ASAN probe now sees CLANG as resolved from LLVM=<suffix-or-path> rather than the bare 'clang' default it saw above the include, while the CLANG_CPUV4 probe, needed before lib.mk, keeps the old behavior. BPF_GCC, TEST_KMODS and the knobs the runner never reads (SKIP_*, submake_extras, TEST_KMOD_TARGETS, the VMLINUX_BTF block) stay in the Makefile - the first two are needed before lib.mk is included, where Makefile.buildvars cannot yet be, and reach the runners from there once a later patch adds them: TEST_KMODS exported in the environment, BPF_GCC as the bpf_gcc flavor's compiler parameter. Definitions that reach no runner, directly or as a sub-make parameter, also stay - except HOST_INCLUDE_DIR, which moves with the conditional block it shares with the host build directories - and the four that derive from Makefile.buildvars values sit in a block right after the include. Suggested-by: Eduard Zingerman <[email protected]> Assisted-by: Claude:claude-fable-5 shellcheck Signed-off-by: Mykola Lysenko <[email protected]> --- tools/testing/selftests/bpf/Makefile | 175 ++--------------- .../testing/selftests/bpf/Makefile.buildvars | 184 ++++++++++++++++++ 2 files changed, 198 insertions(+), 161 deletions(-) create mode 100644 tools/testing/selftests/bpf/Makefile.buildvars diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 8ac6c8844d4a..432897613b90 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -5,109 +5,21 @@ include ../../../scripts/Makefile.include CXX ?= $(CROSS_COMPILE)g++ -TOOLSDIR := $(abspath ../../..) -LIBDIR := $(TOOLSDIR)/lib -BPFDIR := $(LIBDIR)/bpf -TOOLSINCDIR := $(TOOLSDIR)/include -TOOLSARCHINCDIR := $(TOOLSDIR)/arch/$(SRCARCH)/include -BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool -APIDIR := $(TOOLSINCDIR)/uapi -ifneq ($(O),) -GENDIR := $(O)/include/generated -else -GENDIR := $(abspath ../../../../include/generated) -endif -GENHDR := $(GENDIR)/autoconf.h -PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config - -ifneq ($(wildcard $(GENHDR)),) - GENFLAGS := -DHAVE_GENHDR -endif - BPF_GCC ?= $(shell command -v bpf-gcc;) -ifdef ASAN -SAN_CFLAGS ?= -fsanitize=address -fno-omit-frame-pointer -else -SAN_CFLAGS ?= -endif -SAN_LDFLAGS ?= $(SAN_CFLAGS) -RELEASE ?= -OPT_FLAGS ?= $(if $(RELEASE),-O2,-O0) - -LIBELF_CFLAGS := $(shell $(PKG_CONFIG) libelf --cflags 2>/dev/null) -LIBELF_LIBS := $(shell $(PKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf) SKIP_DOCS ?= SKIP_LLVM ?= SKIP_LIBBFD ?= SKIP_CRYPTO ?= -# When BPF_STRICT_BUILD is 1, any BPF object, skeleton, test object, or -# benchmark compilation failure is fatal. Set to 0 to tolerate failures -# and continue building the remaining tests. -BPF_STRICT_BUILD ?= 1 -PERMISSIVE := $(filter 0,$(BPF_STRICT_BUILD)) - -# Permissive-mode recipe suffix: on failure, remove the target, emit a -# SKIP marker and report success so the rest of the build continues. -# $(1) - SKIP tag (BPF, TEST, BENCH, SKEL, LINK, ...) -# $(2) - optional extra files to remove alongside the target -# $(3) - optional note appended to the SKIP message -skip_on_fail = $(if $(PERMISSIVE),|| { $(RM) $@ $(2); \ - printf ' %-12s %s\n' 'SKIP-$(1)' '$(notdir $@)$(if $(3), $(3))' 1>&2; }) - -# Permissive-mode recipe prefix: when a prerequisite object is missing -# (its compile failed and was skipped), remove the target and $(3), -# emit a SKIP marker and report success without running the rest of -# the recipe. -# $(1) - SKIP tag -# $(2) - input files to check -# $(3) - optional extra files to remove alongside the target -skip_if_missing = $(if $(PERMISSIVE),for f in $(2); do [ -f $$f ] || { \ - $(RM) $@ $(3); \ - printf ' %-12s %s\n' 'SKIP-$(1)' '$(notdir $@)' 1>&2; exit 0; }; done;) - -ifeq ($(srctree),) -srctree := $(patsubst %/,%,$(dir $(CURDIR))) -srctree := $(patsubst %/,%,$(dir $(srctree))) -srctree := $(patsubst %/,%,$(dir $(srctree))) -srctree := $(patsubst %/,%,$(dir $(srctree))) -endif - -COMMON_CFLAGS = -g $(OPT_FLAGS) -rdynamic -std=gnu11 \ - -Wall -Werror -fno-omit-frame-pointer \ - -Wno-unused-but-set-variable \ - $(GENFLAGS) $(SAN_CFLAGS) $(LIBELF_CFLAGS) \ - -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \ - -I$(TOOLSINCDIR) -I$(TOOLSARCHINCDIR) -I$(APIDIR) -I$(OUTPUT) \ - -I$(CURDIR)/libarena/include -LDFLAGS += $(SAN_LDFLAGS) -LDLIBS += $(LIBELF_LIBS) -lz -lrt -lpthread - -PCAP_CFLAGS := $(shell $(PKG_CONFIG) --cflags libpcap 2>/dev/null && echo "-DTRAFFIC_MONITOR=1") -PCAP_LIBS := $(shell $(PKG_CONFIG) --libs libpcap 2>/dev/null) -LDLIBS += $(PCAP_LIBS) -CFLAGS += $(COMMON_CFLAGS) $(PCAP_CFLAGS) - # 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 -# Check whether clang supports BPF address sanitizer (requires LLVM 22+) -CLANG_HAS_ARENA_ASAN := $(shell echo 'int x;' | \ - $(CLANG) --target=bpf -fsanitize=kernel-address \ - -mllvm -asan-shadow-addr-space=1 \ - -x c -c - -o /dev/null 2>/dev/null && echo 1) - # Order correspond to 'make run_tests' order TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_progs \ test_sockmap \ @@ -185,7 +97,21 @@ override define CLEAN $(Q)$(MAKE) docs-clean endef +# ../lib.mk appends to the flags inherited from the environment; +# Makefile.buildvars rebuilds CFLAGS and LDFLAGS around these snapshots +# so that its own additions precede lib.mk's, as they did when they +# were defined above the include. +INHERITED_CFLAGS := $(CFLAGS) +INHERITED_LDFLAGS := $(LDFLAGS) include ../lib.mk +include Makefile.buildvars + +# Definitions only this Makefile consumes; placed after the include +# because some of them derive from Makefile.buildvars values. +BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool +HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a +BPF_TARGET_ENDIAN:=$(if $(IS_LITTLE_ENDIAN),--target=bpfel,--target=bpfeb) +CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) NON_CHECK_FEAT_TARGETS := clean docs-clean emit_tests CHECK_FEAT := $(filter-out $(NON_CHECK_FEAT_TARGETS),$(or $(MAKECMDGOALS), "none")) @@ -230,21 +156,6 @@ ifeq ($(feature-llvm),1) endif endif -SCRATCH_DIR := $(OUTPUT)/tools -BUILD_DIR := $(SCRATCH_DIR)/build -INCLUDE_DIR := $(SCRATCH_DIR)/include -BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a -ifneq ($(CROSS_COMPILE),) -HOST_BUILD_DIR := $(BUILD_DIR)/host -HOST_SCRATCH_DIR := $(OUTPUT)/host-tools -HOST_INCLUDE_DIR := $(HOST_SCRATCH_DIR)/include -else -HOST_BUILD_DIR := $(BUILD_DIR) -HOST_SCRATCH_DIR := $(SCRATCH_DIR) -HOST_INCLUDE_DIR := $(INCLUDE_DIR) -endif -HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a -RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ ../../../../vmlinux \ @@ -333,17 +244,6 @@ $(TEST_KMOD_TARGETS): $(addprefix test_kmods/,$(TEST_KMODS)) $(call msg,MOD,,$@) $(Q)$(if $(PERMISSIVE),if [ -f test_kmods/$(@F) ]; then )cp test_kmods/$(@F) $@$(if $(PERMISSIVE),; fi) - -DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool -ifneq ($(CROSS_COMPILE),) -CROSS_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool -TRUNNER_BPFTOOL := $(CROSS_BPFTOOL) -USE_BOOTSTRAP := "" -else -TRUNNER_BPFTOOL := $(DEFAULT_BPFTOOL) -USE_BOOTSTRAP := "bootstrap/" -endif - $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ) TESTING_HELPERS := $(OUTPUT)/testing_helpers.o @@ -364,7 +264,6 @@ $(OUTPUT)/test_maps: $(TESTING_HELPERS) $(OUTPUT)/test_verifier: $(TESTING_HELPERS) $(CAP_HELPERS) $(UNPRIV_HELPERS) $(OUTPUT)/xsk.o: $(BPFOBJ) -BPFTOOL ?= $(DEFAULT_BPFTOOL) $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ @@ -457,46 +356,6 @@ $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \ HOSTPKG_CONFIG='$(PKG_CONFIG)' \ OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ) -# Get Clang's default includes on this system, as opposed to those seen by -# '--target=bpf'. This fixes "missing" files on some architectures/distros, -# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. -# -# Use '-idirafter': Don't interfere with include mechanics except where the -# build would have failed anyways. -define get_sys_includes -$(shell $(1) $(2) -v -E - </dev/null 2>&1 \ - | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ -$(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') \ -$(shell $(1) $(2) -dM -E - </dev/null | grep '__loongarch_grlen ' | awk '{printf("-D__BITS_PER_LONG=%d", $$3)}') \ -$(shell $(1) $(2) -dM -E - </dev/null | grep -E 'MIPS(EL|EB)|_MIPS_SZ(PTR|LONG) |_MIPS_SIM |_ABI(O32|N32|64) ' | awk '{printf("-D%s=%s ", $$2, $$3)}') -endef - -# Determine target endianness. -IS_LITTLE_ENDIAN := $(shell $(CC) -dM -E - </dev/null | \ - grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__') -MENDIAN:=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) -BPF_TARGET_ENDIAN:=$(if $(IS_LITTLE_ENDIAN),--target=bpfel,--target=bpfeb) - -ifneq ($(CROSS_COMPILE),) -CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%)) -endif - -CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH)) -BPF_CFLAGS = -g -Wall -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ - -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR) \ - -I$(TOOLSINCDIR) -I$(CURDIR)/libarena/include \ - -I$(abspath $(OUTPUT)/../usr/include) \ - -std=gnu11 \ - -fno-strict-aliasing \ - -Wno-microsoft-anon-tag \ - -fms-extensions \ - -Wno-compare-distinct-pointer-types \ - -Wno-initializer-overrides \ - # -# TODO: enable me -Wsign-compare - -CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) - # Build BPF object using Clang # $1 - input .c file # $2 - output .o file @@ -763,10 +622,7 @@ $(OUTPUT)/$(TRUNNER_BINARY): $(if $(filter test_progs%,$1),$(if $(PERMISSIVE),$$ endef -VERIFY_SIG_SETUP := $(CURDIR)/verify_sig_setup.sh VERIFY_SIG_HDR := verification_cert.h -VERIFICATION_CERT := $(BUILD_DIR)/signing_key.der -PRIVATE_KEY := $(BUILD_DIR)/signing_key.pem # One genkey run produces both files. A plain two-target rule is not # grouped - if both files are stale make would run genkey twice, under @@ -802,7 +658,6 @@ LIBARENA_COMMON_DEPS := $(wildcard libarena/Makefile \ LIBARENA_BPF_DEPS := $(LIBARENA_COMMON_DEPS) $(wildcard libarena/selftests/*) LIBARENA_BENCH_BPF_DEPS := $(LIBARENA_COMMON_DEPS) $(wildcard libarena/benchs/*) -LIBARENA_SKEL := libarena/libarena.skel.h LIBARENA_BENCH_SKEL := libarena/libarena_bench.skel.h $(LIBARENA_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS) @@ -812,8 +667,6 @@ $(LIBARENA_BENCH_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BENCH_BPF_ +$(MAKE) -C libarena benchmarks $(LIBARENA_MAKE_ARGS) ifneq ($(CLANG_HAS_ARENA_ASAN),) -LIBARENA_ASAN_SKEL := libarena/libarena_asan.skel.h -CFLAGS += -DHAS_BPF_ARENA_ASAN $(LIBARENA_ASAN_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS) +$(MAKE) -C libarena libarena_asan.skel.h $(LIBARENA_MAKE_ARGS) diff --git a/tools/testing/selftests/bpf/Makefile.buildvars b/tools/testing/selftests/bpf/Makefile.buildvars new file mode 100644 index 000000000000..dc0be9ee72bc --- /dev/null +++ b/tools/testing/selftests/bpf/Makefile.buildvars @@ -0,0 +1,184 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Shared toolchain, path and flag definitions for the BPF selftests +# build, included by both Makefile and Makefile.runner. Definitions +# follow the order they had in the Makefile before the split. + +TOOLSDIR := $(abspath ../../..) +LIBDIR := $(TOOLSDIR)/lib +BPFDIR := $(LIBDIR)/bpf +TOOLSINCDIR := $(TOOLSDIR)/include +TOOLSARCHINCDIR := $(TOOLSDIR)/arch/$(SRCARCH)/include +APIDIR := $(TOOLSINCDIR)/uapi +ifneq ($(O),) +GENDIR := $(O)/include/generated +else +GENDIR := $(abspath ../../../../include/generated) +endif +GENHDR := $(GENDIR)/autoconf.h +PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config + +ifneq ($(wildcard $(GENHDR)),) + GENFLAGS := -DHAVE_GENHDR +endif + +ifdef ASAN +SAN_CFLAGS ?= -fsanitize=address -fno-omit-frame-pointer +else +SAN_CFLAGS ?= +endif +SAN_LDFLAGS ?= $(SAN_CFLAGS) +RELEASE ?= +OPT_FLAGS ?= $(if $(RELEASE),-O2,-O0) + +LIBELF_CFLAGS := $(shell $(PKG_CONFIG) libelf --cflags 2>/dev/null) +LIBELF_LIBS := $(shell $(PKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf) + +# When BPF_STRICT_BUILD is 1, any BPF object, skeleton, test object, or +# benchmark compilation failure is fatal. Set to 0 to tolerate failures +# and continue building the remaining tests. +BPF_STRICT_BUILD ?= 1 +PERMISSIVE := $(filter 0,$(BPF_STRICT_BUILD)) + +# Permissive-mode recipe suffix: on failure, remove the target, emit a +# SKIP marker and report success so the rest of the build continues. +# $(1) - SKIP tag (BPF, TEST, BENCH, SKEL, LINK, ...) +# $(2) - optional extra files to remove alongside the target +# $(3) - optional note appended to the SKIP message +skip_on_fail = $(if $(PERMISSIVE),|| { $(RM) $@ $(2); \ + printf ' %-12s %s\n' 'SKIP-$(1)' '$(notdir $@)$(if $(3), $(3))' 1>&2; }) + +# Permissive-mode recipe prefix: when a prerequisite object is missing +# (its compile failed and was skipped), remove the target and $(3), +# emit a SKIP marker and report success without running the rest of +# the recipe. +# $(1) - SKIP tag +# $(2) - input files to check +# $(3) - optional extra files to remove alongside the target +skip_if_missing = $(if $(PERMISSIVE),for f in $(2); do [ -f $$f ] || { \ + $(RM) $@ $(3); \ + printf ' %-12s %s\n' 'SKIP-$(1)' '$(notdir $@)' 1>&2; exit 0; }; done;) + +ifeq ($(srctree),) +srctree := $(patsubst %/,%,$(dir $(CURDIR))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +endif + +COMMON_CFLAGS = -g $(OPT_FLAGS) -rdynamic -std=gnu11 \ + -Wall -Werror -fno-omit-frame-pointer \ + -Wno-unused-but-set-variable \ + $(GENFLAGS) $(SAN_CFLAGS) $(LIBELF_CFLAGS) \ + -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \ + -I$(TOOLSINCDIR) -I$(TOOLSARCHINCDIR) -I$(APIDIR) -I$(OUTPUT) \ + -I$(CURDIR)/libarena/include +LDLIBS += $(LIBELF_LIBS) -lz -lrt -lpthread + +PCAP_CFLAGS := $(shell $(PKG_CONFIG) --cflags libpcap 2>/dev/null && echo "-DTRAFFIC_MONITOR=1") +PCAP_LIBS := $(shell $(PKG_CONFIG) --libs libpcap 2>/dev/null) +LDLIBS += $(PCAP_LIBS) + +ifneq ($(LLVM),) +# Silence some warnings when compiled with clang +CLANG_WARN_CFLAGS := -Wno-unused-command-line-argument +endif + +# Before the split these definitions sat above the ../lib.mk include: +# they appended to the flags inherited from the environment, and +# lib.mk's additions (USERCFLAGS/USERLDFLAGS among them) came last. +# This file is parsed after lib.mk at the top level and in its place +# in the runner sub-makes, so the same order is rebuilt here. The +# includer snapshots the inherited flags in INHERITED_CFLAGS and +# INHERITED_LDFLAGS before lib.mk runs; whatever lib.mk appended since +# is the tail of the current value. +lib_mk_added = $(wordlist $(words x $(INHERITED_$(1))),$(words $($(1))),$($(1))) +LIB_MK_CFLAGS := $(call lib_mk_added,CFLAGS) +LIB_MK_LDFLAGS := $(call lib_mk_added,LDFLAGS) +CFLAGS = $(INHERITED_CFLAGS) $(COMMON_CFLAGS) $(PCAP_CFLAGS) \ + $(CLANG_WARN_CFLAGS) $(LIB_MK_CFLAGS) +LDFLAGS = $(INHERITED_LDFLAGS) $(SAN_LDFLAGS) $(LIB_MK_LDFLAGS) + +# Check whether clang supports BPF address sanitizer (requires LLVM 22+). +# This runs after ../lib.mk has resolved CLANG from LLVM=<suffix or path>, +# so it probes the compiler that builds the BPF objects. +CLANG_HAS_ARENA_ASAN := $(shell echo 'int x;' | \ + $(CLANG) --target=bpf -fsanitize=kernel-address \ + -mllvm -asan-shadow-addr-space=1 \ + -x c -c - -o /dev/null 2>/dev/null && echo 1) + +SCRATCH_DIR := $(OUTPUT)/tools +BUILD_DIR := $(SCRATCH_DIR)/build +INCLUDE_DIR := $(SCRATCH_DIR)/include +BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a +ifneq ($(CROSS_COMPILE),) +HOST_BUILD_DIR := $(BUILD_DIR)/host +HOST_SCRATCH_DIR := $(OUTPUT)/host-tools +HOST_INCLUDE_DIR := $(HOST_SCRATCH_DIR)/include +else +HOST_BUILD_DIR := $(BUILD_DIR) +HOST_SCRATCH_DIR := $(SCRATCH_DIR) +HOST_INCLUDE_DIR := $(INCLUDE_DIR) +endif +RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids + +DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool +ifneq ($(CROSS_COMPILE),) +CROSS_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool +TRUNNER_BPFTOOL := $(CROSS_BPFTOOL) +USE_BOOTSTRAP := "" +else +TRUNNER_BPFTOOL := $(DEFAULT_BPFTOOL) +USE_BOOTSTRAP := "bootstrap/" +endif + +BPFTOOL ?= $(DEFAULT_BPFTOOL) + +# Get Clang's default includes on this system, as opposed to those seen by +# '--target=bpf'. This fixes "missing" files on some architectures/distros, +# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. +# +# Use '-idirafter': Don't interfere with include mechanics except where the +# build would have failed anyways. +define get_sys_includes +$(shell $(1) $(2) -v -E - </dev/null 2>&1 \ + | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ +$(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') \ +$(shell $(1) $(2) -dM -E - </dev/null | grep '__loongarch_grlen ' | awk '{printf("-D__BITS_PER_LONG=%d", $$3)}') \ +$(shell $(1) $(2) -dM -E - </dev/null | grep -E 'MIPS(EL|EB)|_MIPS_SZ(PTR|LONG) |_MIPS_SIM |_ABI(O32|N32|64) ' | awk '{printf("-D%s=%s ", $$2, $$3)}') +endef + +# Determine target endianness. +IS_LITTLE_ENDIAN := $(shell $(CC) -dM -E - </dev/null | \ + grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__') +MENDIAN:=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) + +ifneq ($(CROSS_COMPILE),) +CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%)) +endif + +# Immediate on purpose: expanding get_sys_includes forks several shells. +CLANG_SYS_INCLUDES := $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH)) +BPF_CFLAGS = -g -Wall -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ + -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR) \ + -I$(TOOLSINCDIR) -I$(CURDIR)/libarena/include \ + -I$(abspath $(OUTPUT)/../usr/include) \ + -std=gnu11 \ + -fno-strict-aliasing \ + -Wno-microsoft-anon-tag \ + -fms-extensions \ + -Wno-compare-distinct-pointer-types \ + -Wno-initializer-overrides \ + # +# TODO: enable me -Wsign-compare + +VERIFY_SIG_SETUP := $(CURDIR)/verify_sig_setup.sh +VERIFICATION_CERT := $(BUILD_DIR)/signing_key.der +PRIVATE_KEY := $(BUILD_DIR)/signing_key.pem + +LIBARENA_SKEL := libarena/libarena.skel.h + +ifneq ($(CLANG_HAS_ARENA_ASAN),) +LIBARENA_ASAN_SKEL := libarena/libarena_asan.skel.h +CFLAGS += -DHAS_BPF_ARENA_ASAN +endif -- 2.43.0