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# SPDX-License-Identifier: GPL-2.0
# BPF object and skeleton rules for one flavor.
# Included by the main Makefile for default outputs and by runners
# for their flavor. Unflavored runners require the default outputs first.
#
# Parameters (variables defined by the includer):
# RDIR output directory of this flavor
# FLAVOR flavor name, empty for the default
# BINARY runner binary name, for build-log messages
# BPF_CC BPF compiler
# BPF_CC_MSG build-log tag (CLNG-BPF/GCC-BPF)
# BPF_CC_FLAGS per-flavor compiler flags
# BPF_SYS_INCLUDES system include flags for $(BPF_CC)
# BPF_DEFINES extra defines (-DENABLE_ATOMICS_TESTS)
# BPF objects and skeletons
ifneq ($(BPF_CC),)
BPF_SRCS := $(notdir $(wildcard progs/*.c))
BPF_OBJS := $(patsubst %.c,$(RDIR)/%.bpf.o,$(BPF_SRCS))
SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c \
data_in_arena_extern.c data_in_arena_nomap.c
LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h \
linked_vars.skel.h linked_maps.skel.h linked_arena.skel.h \
test_subskeleton.skel.h test_subskeleton_lib.skel.h \
test_usdt.skel.h tracing_multi.skel.h \
tracing_multi_module.skel.h \
tracing_multi_intersect.skel.h \
tracing_multi_session.skel.h
LSKELS := fexit_sleep.c trace_printk.c trace_vprintk.c map_ptr_kern.c \
core_kern.c core_kern_overflow.c test_ringbuf.c \
test_ringbuf_n.c test_ringbuf_map_key.c test_ringbuf_write.c \
test_ringbuf_overwrite.c callx_rodata.c
LSKELS_SIGNED := fentry_test.c fexit_test.c atomics.c
# 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 test_global_percpu_data.c
SKEL_BLACKLIST += $(LSKELS) $(LSKELS_SIGNED)
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
linked_arena.skel.h-deps := linked_arena1.bpf.o linked_arena2.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
tracing_multi.skel.h-deps := tracing_multi_attach.bpf.o tracing_multi_check.bpf.o
tracing_multi_module.skel.h-deps := tracing_multi_attach_module.bpf.o tracing_multi_check.bpf.o
tracing_multi_intersect.skel.h-deps := tracing_multi_intersect_attach.bpf.o tracing_multi_check.bpf.o
tracing_multi_session.skel.h-deps := tracing_multi_session_attach.bpf.o tracing_multi_check.bpf.o
LINKED_BPF_OBJS := $(foreach skel,$(LINKED_SKELS),$($(skel)-deps))
LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(LINKED_BPF_OBJS))
SKELS := $(patsubst %.c,$(RDIR)/%.skel.h, \
$(filter-out $(SKEL_BLACKLIST) $(LINKED_BPF_SRCS),$(BPF_SRCS)))
LSKELS_H := $(patsubst %.c,$(RDIR)/%.lskel.h,$(LSKELS) $(LSKELS_EXTRA))
LSKELS_SIGNED_H := $(patsubst %.c,$(RDIR)/%.lskel.h,$(LSKELS_SIGNED))
LINKED_SKELS_H := $(addprefix $(RDIR)/,$(LINKED_SKELS))
ALL_SKELS := $(SKELS) $(LSKELS_H) $(LSKELS_SIGNED_H) $(LINKED_SKELS_H)
HEADERS_FOR_BPF_OBJS := $(wildcard $(BPFDIR)/*.bpf.h) \
$(wildcard $(CURDIR)/libarena/include/*.[ch]) \
$(addprefix $(BPFDIR)/, bpf_core_read.h \
bpf_endian.h \
bpf_helpers.h \
bpf_tracing.h)
# 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
cmd_bpf_compile = $(BPF_CC) $(BPF_CFLAGS) $(BPF_SYS_INCLUDES) $(BPF_DEFINES) \
$($<-CFLAGS) $($<-$(FLAVOR)-CFLAGS) $(BPF_CC_FLAGS) -c $< -o $@ $(call skip_on_fail,BPF)
$(BPF_OBJS): $(RDIR)/%.bpf.o: progs/%.c progs/*.h \
$(INCLUDE_DIR)/vmlinux.h $(HEADERS_FOR_BPF_OBJS) \
| $(RDIR) $(BPFOBJ)
$(call msg,$(BPF_CC_MSG),$(BINARY),$@)
$(Q)$(cmd_bpf_compile)
GEN_SKEL := ./gen_bpf_skel.sh
cmd_bpf_gen_skel = $(call skip_if_missing,SKEL,$<,$(@:.skel.h=.subskel.h))printf \
' %-8s%s %s\n' 'GEN-SKEL' ' [$(BINARY)]' '$(notdir $@)'; \
BPFTOOL=$(BPFTOOL) $(GEN_SKEL) --name $* \
--skel $@ --subskel $(@:.skel.h=.subskel.h) $< $(call \
skip_on_fail,SKEL,$(@:.skel.h=.subskel.h))
$(SKELS): $(RDIR)/%.skel.h: $(RDIR)/%.bpf.o $(BPFTOOL) $(GEN_SKEL) | $(RDIR)
$(Q)$(cmd_bpf_gen_skel)
cmd_bpf_gen_lskel = $(call skip_if_missing,SKEL,$<)printf \
' %-8s%s %s\n' 'GEN-SKEL' ' [$(BINARY)]' '$(notdir $@)'; \
BPFTOOL=$(BPFTOOL) $(GEN_SKEL) --name $*_lskel --lskel \
--skel $@ $< $(call skip_on_fail,SKEL)
$(LSKELS_H): $(RDIR)/%.lskel.h: $(RDIR)/%.bpf.o $(BPFTOOL) $(GEN_SKEL) | $(RDIR)
$(Q)$(cmd_bpf_gen_lskel)
cmd_bpf_gen_signed_lskel = $(call skip_if_missing,SKEL,$<)printf \
' %-8s%s %s\n' 'GEN-SKEL' ' [$(BINARY) (signed)]' '$(notdir $@)'; \
BPFTOOL=$(BPFTOOL) PRIVATE_KEY=$(PRIVATE_KEY) \
VERIFICATION_CERT=$(VERIFICATION_CERT) \
$(GEN_SKEL) --sign --name $*_lskel \
--skel $@ $< $(call skip_on_fail,SKEL)
$(LSKELS_SIGNED_H): $(RDIR)/%.lskel.h: $(RDIR)/%.bpf.o $(BPFTOOL) \
$(GEN_SKEL) $(PRIVATE_KEY) $(VERIFICATION_CERT) | $(RDIR)
$(Q)$(cmd_bpf_gen_signed_lskel)
cmd_bpf_link_skel = $(call skip_if_missing,SKEL,$(addprefix $(RDIR)/,\
$($*.skel.h-deps)),$(@:.skel.h=.subskel.h))printf \
' %-8s%s %s\n' 'LINK-BPF' ' [$(BINARY)]' '$(notdir $(@:.skel.h=.bpf.o))'; \
printf ' %-8s%s %s\n' 'GEN-SKEL' ' [$(BINARY)]' '$(notdir $@)'; \
BPFTOOL=$(BPFTOOL) $(GEN_SKEL) --name $* \
--skel $@ --subskel $(@:.skel.h=.subskel.h) \
$(addprefix $(RDIR)/,$($*.skel.h-deps)) $(call \
skip_on_fail,SKEL,$(@:.skel.h=.subskel.h))
# .SECONDEXPANSION here allows to correctly expand %-deps variables as prerequisites
.SECONDEXPANSION:
$(LINKED_SKELS_H): $(RDIR)/%.skel.h: $$(addprefix $(RDIR)/,$$($$*.skel.h-deps)) \
$(BPFTOOL) $(GEN_SKEL) | $(RDIR)
$(Q)$(cmd_bpf_link_skel)
# Programs in Rust, see Makefile.buildvars. No skeletons: the objects may be absent.
ifneq ($(RUST_CORE),)
ifeq ($(BPF_CC),$(CLANG))
RUST_OBJS := $(patsubst progs/%.rs,$(RDIR)/%.bpf.o,$(wildcard progs/*.rs))
BPF_OBJS += $(RUST_OBJS)
$(RUST_OBJS): $(RDIR)/%.bpf.o: progs/%.rs $(RUST_CORE) | $(RDIR)
$(call msg,RUSTC,$(BINARY),$@)
+$(Q)$(RUSTC_BPF) --edition 2021 -C debuginfo=2 --emit=llvm-bc \
$(patsubst -mcpu=%,-C target-cpu=%,$(filter -mcpu=%,$(BPF_CC_FLAGS))) \
-o $(dir $(RUST_CORE))$(BINARY)-$*.bc $< && \
$(BPF_CC) $(BPF_CC_FLAGS) -c $(dir $(RUST_CORE))$(BINARY)-$*.bc -o $@ $(call skip_on_fail,BPF)
endif
endif
endif # BPF_CC
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