123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450 |
- # SPDX-License-Identifier: GPL-2.0
- BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
- TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
- pound := \#
- # List of programs to build
- tprogs-y := test_lru_dist
- tprogs-y += sock_example
- tprogs-y += fds_example
- tprogs-y += sockex1
- tprogs-y += sockex2
- tprogs-y += sockex3
- tprogs-y += tracex1
- tprogs-y += tracex2
- tprogs-y += tracex3
- tprogs-y += tracex4
- tprogs-y += tracex5
- tprogs-y += tracex6
- tprogs-y += tracex7
- tprogs-y += test_probe_write_user
- tprogs-y += trace_output
- tprogs-y += lathist
- tprogs-y += offwaketime
- tprogs-y += spintest
- tprogs-y += map_perf_test
- tprogs-y += test_overhead
- tprogs-y += test_cgrp2_array_pin
- tprogs-y += test_cgrp2_attach
- tprogs-y += test_cgrp2_sock
- tprogs-y += test_cgrp2_sock2
- tprogs-y += xdp1
- tprogs-y += xdp2
- tprogs-y += xdp_router_ipv4
- tprogs-y += test_current_task_under_cgroup
- tprogs-y += trace_event
- tprogs-y += sampleip
- tprogs-y += tc_l2_redirect
- tprogs-y += lwt_len_hist
- tprogs-y += xdp_tx_iptunnel
- tprogs-y += test_map_in_map
- tprogs-y += per_socket_stats_example
- tprogs-y += xdp_rxq_info
- tprogs-y += syscall_tp
- tprogs-y += cpustat
- tprogs-y += xdp_adjust_tail
- tprogs-y += xdp_fwd
- tprogs-y += task_fd_query
- tprogs-y += xdp_sample_pkts
- tprogs-y += ibumad
- tprogs-y += hbm
- tprogs-y += xdp_redirect_cpu
- tprogs-y += xdp_redirect_map_multi
- tprogs-y += xdp_redirect_map
- tprogs-y += xdp_redirect
- tprogs-y += xdp_monitor
- # Libbpf dependencies
- LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf
- LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf
- LIBBPF_DESTDIR = $(LIBBPF_OUTPUT)
- LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
- LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a
- CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
- TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
- XDP_SAMPLE := xdp_sample_user.o
- fds_example-objs := fds_example.o
- sockex1-objs := sockex1_user.o
- sockex2-objs := sockex2_user.o
- sockex3-objs := sockex3_user.o
- tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
- tracex2-objs := tracex2_user.o
- tracex3-objs := tracex3_user.o
- tracex4-objs := tracex4_user.o
- tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
- tracex6-objs := tracex6_user.o
- tracex7-objs := tracex7_user.o
- test_probe_write_user-objs := test_probe_write_user_user.o
- trace_output-objs := trace_output_user.o
- lathist-objs := lathist_user.o
- offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
- spintest-objs := spintest_user.o $(TRACE_HELPERS)
- map_perf_test-objs := map_perf_test_user.o
- test_overhead-objs := test_overhead_user.o
- test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
- test_cgrp2_attach-objs := test_cgrp2_attach.o
- test_cgrp2_sock-objs := test_cgrp2_sock.o
- test_cgrp2_sock2-objs := test_cgrp2_sock2.o
- xdp1-objs := xdp1_user.o
- # reuse xdp1 source intentionally
- xdp2-objs := xdp1_user.o
- test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
- test_current_task_under_cgroup_user.o
- trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
- sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
- tc_l2_redirect-objs := tc_l2_redirect_user.o
- lwt_len_hist-objs := lwt_len_hist_user.o
- xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
- test_map_in_map-objs := test_map_in_map_user.o
- per_socket_stats_example-objs := cookie_uid_helper_example.o
- xdp_rxq_info-objs := xdp_rxq_info_user.o
- syscall_tp-objs := syscall_tp_user.o
- cpustat-objs := cpustat_user.o
- xdp_adjust_tail-objs := xdp_adjust_tail_user.o
- xdp_fwd-objs := xdp_fwd_user.o
- task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
- xdp_sample_pkts-objs := xdp_sample_pkts_user.o
- ibumad-objs := ibumad_user.o
- hbm-objs := hbm.o $(CGROUP_HELPERS)
- xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o $(XDP_SAMPLE)
- xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o $(XDP_SAMPLE)
- xdp_redirect_map-objs := xdp_redirect_map_user.o $(XDP_SAMPLE)
- xdp_redirect-objs := xdp_redirect_user.o $(XDP_SAMPLE)
- xdp_monitor-objs := xdp_monitor_user.o $(XDP_SAMPLE)
- xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE)
- # Tell kbuild to always build the programs
- always-y := $(tprogs-y)
- always-y += sockex1_kern.o
- always-y += sockex2_kern.o
- always-y += sockex3_kern.o
- always-y += tracex1_kern.o
- always-y += tracex2_kern.o
- always-y += tracex3_kern.o
- always-y += tracex4_kern.o
- always-y += tracex5_kern.o
- always-y += tracex6_kern.o
- always-y += tracex7_kern.o
- always-y += sock_flags_kern.o
- always-y += test_probe_write_user_kern.o
- always-y += trace_output_kern.o
- always-y += tcbpf1_kern.o
- always-y += tc_l2_redirect_kern.o
- always-y += lathist_kern.o
- always-y += offwaketime_kern.o
- always-y += spintest_kern.o
- always-y += map_perf_test_kern.o
- always-y += test_overhead_tp_kern.o
- always-y += test_overhead_raw_tp_kern.o
- always-y += test_overhead_kprobe_kern.o
- always-y += parse_varlen.o parse_simple.o parse_ldabs.o
- always-y += test_cgrp2_tc_kern.o
- always-y += xdp1_kern.o
- always-y += xdp2_kern.o
- always-y += test_current_task_under_cgroup_kern.o
- always-y += trace_event_kern.o
- always-y += sampleip_kern.o
- always-y += lwt_len_hist_kern.o
- always-y += xdp_tx_iptunnel_kern.o
- always-y += test_map_in_map_kern.o
- always-y += tcp_synrto_kern.o
- always-y += tcp_rwnd_kern.o
- always-y += tcp_bufs_kern.o
- always-y += tcp_cong_kern.o
- always-y += tcp_iw_kern.o
- always-y += tcp_clamp_kern.o
- always-y += tcp_basertt_kern.o
- always-y += tcp_tos_reflect_kern.o
- always-y += tcp_dumpstats_kern.o
- always-y += xdp_rxq_info_kern.o
- always-y += xdp2skb_meta_kern.o
- always-y += syscall_tp_kern.o
- always-y += cpustat_kern.o
- always-y += xdp_adjust_tail_kern.o
- always-y += xdp_fwd_kern.o
- always-y += task_fd_query_kern.o
- always-y += xdp_sample_pkts_kern.o
- always-y += ibumad_kern.o
- always-y += hbm_out_kern.o
- always-y += hbm_edt_kern.o
- ifeq ($(ARCH), arm)
- # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
- # headers when arm instruction set identification is requested.
- ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
- BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
- TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
- endif
- ifeq ($(ARCH), mips)
- TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__
- ifdef CONFIG_MACH_LOONGSON64
- BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64
- BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic
- endif
- endif
- TPROGS_CFLAGS += -Wall -O2
- TPROGS_CFLAGS += -Wmissing-prototypes
- TPROGS_CFLAGS += -Wstrict-prototypes
- TPROGS_CFLAGS += -I$(objtree)/usr/include
- TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
- TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE)
- TPROGS_CFLAGS += -I$(srctree)/tools/include
- TPROGS_CFLAGS += -I$(srctree)/tools/perf
- TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
- ifdef SYSROOT
- TPROGS_CFLAGS += --sysroot=$(SYSROOT)
- TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
- endif
- TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
- TPROGLDLIBS_xdp_monitor += -lm
- TPROGLDLIBS_xdp_redirect += -lm
- TPROGLDLIBS_xdp_redirect_cpu += -lm
- TPROGLDLIBS_xdp_redirect_map += -lm
- TPROGLDLIBS_xdp_redirect_map_multi += -lm
- TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread
- TPROGLDLIBS_tracex4 += -lrt
- TPROGLDLIBS_trace_output += -lrt
- TPROGLDLIBS_map_perf_test += -lrt
- TPROGLDLIBS_test_overhead += -lrt
- # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
- # make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
- LLC ?= llc
- CLANG ?= clang
- OPT ?= opt
- LLVM_DIS ?= llvm-dis
- LLVM_OBJCOPY ?= llvm-objcopy
- LLVM_READELF ?= llvm-readelf
- BTF_PAHOLE ?= pahole
- # Detect that we're cross compiling and use the cross compiler
- ifdef CROSS_COMPILE
- CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
- endif
- # Don't evaluate probes and warnings if we need to run make recursively
- ifneq ($(src),)
- HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
- $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
- -o /dev/null 2>/dev/null && echo okay)
- ifeq ($(HDR_PROBE),)
- $(warning WARNING: Detected possible issues with include path.)
- $(warning WARNING: Please install kernel headers locally (make headers_install).)
- endif
- BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
- BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
- BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
- BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
- $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
- $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
- /bin/rm -f ./llvm_btf_verify.o)
- BPF_EXTRA_CFLAGS += -fno-stack-protector
- ifneq ($(BTF_LLVM_PROBE),)
- BPF_EXTRA_CFLAGS += -g
- else
- ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
- BPF_EXTRA_CFLAGS += -g
- LLC_FLAGS += -mattr=dwarfris
- DWARF2BTF = y
- endif
- endif
- endif
- # Trick to allow make to be run from this directory
- all:
- $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
- clean:
- $(MAKE) -C ../../ M=$(CURDIR) clean
- @find $(CURDIR) -type f -name '*~' -delete
- @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool
- $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
- # Fix up variables inherited from Kbuild that tools/ build system won't like
- $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
- LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \
- O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
- $@ install_headers
- BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
- BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
- BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
- $(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
- $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \
- OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
- $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
- $(call msg,MKDIR,$@)
- $(Q)mkdir -p $@
- $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
- $(call filechk,offsets,__SYSCALL_NRS_H__)
- targets += syscall_nrs.s
- clean-files += syscall_nrs.h
- FORCE:
- # Verify LLVM compiler tools are available and bpf target is supported by llc
- .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
- verify_cmds: $(CLANG) $(LLC)
- @for TOOL in $^ ; do \
- if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
- echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
- exit 1; \
- else true; fi; \
- done
- verify_target_bpf: verify_cmds
- @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
- echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
- echo " NOTICE: LLVM version >= 3.7.1 required" ;\
- exit 2; \
- else true; fi
- $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
- $(src)/*.c: verify_target_bpf $(LIBBPF)
- libbpf_hdrs: $(LIBBPF)
- $(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs
- .PHONY: libbpf_hdrs
- $(obj)/xdp_redirect_cpu_user.o: $(obj)/xdp_redirect_cpu.skel.h
- $(obj)/xdp_redirect_map_multi_user.o: $(obj)/xdp_redirect_map_multi.skel.h
- $(obj)/xdp_redirect_map_user.o: $(obj)/xdp_redirect_map.skel.h
- $(obj)/xdp_redirect_user.o: $(obj)/xdp_redirect.skel.h
- $(obj)/xdp_monitor_user.o: $(obj)/xdp_monitor.skel.h
- $(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h
- $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
- $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
- $(obj)/hbm.o: $(src)/hbm.h
- $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
- # Override includes for xdp_sample_user.o because $(srctree)/usr/include in
- # TPROGS_CFLAGS causes conflicts
- XDP_SAMPLE_CFLAGS += -Wall -O2 \
- -I$(src)/../../tools/include \
- -I$(src)/../../tools/include/uapi \
- -I$(LIBBPF_INCLUDE) \
- -I$(src)/../../tools/testing/selftests/bpf
- $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS)
- $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
- -include $(BPF_SAMPLES_PATH)/Makefile.target
- VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \
- $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \
- $(abspath ./vmlinux)
- VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
- $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)
- ifeq ($(VMLINUX_H),)
- ifeq ($(VMLINUX_BTF),)
- $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\
- build the kernel or set VMLINUX_BTF or VMLINUX_H variable)
- endif
- $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
- else
- $(Q)cp "$(VMLINUX_H)" $@
- endif
- clean-files += vmlinux.h
- # 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) -v -E - </dev/null 2>&1 \
- | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
- $(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
- endef
- CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
- $(obj)/xdp_redirect_cpu.bpf.o: $(obj)/xdp_sample.bpf.o
- $(obj)/xdp_redirect_map_multi.bpf.o: $(obj)/xdp_sample.bpf.o
- $(obj)/xdp_redirect_map.bpf.o: $(obj)/xdp_sample.bpf.o
- $(obj)/xdp_redirect.bpf.o: $(obj)/xdp_sample.bpf.o
- $(obj)/xdp_monitor.bpf.o: $(obj)/xdp_sample.bpf.o
- $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o
- $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h
- @echo " CLANG-BPF " $@
- $(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \
- -Wno-compare-distinct-pointer-types -I$(srctree)/include \
- -I$(srctree)/samples/bpf -I$(srctree)/tools/include \
- -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \
- -c $(filter %.bpf.c,$^) -o $@
- LINKED_SKELS := xdp_redirect_cpu.skel.h xdp_redirect_map_multi.skel.h \
- xdp_redirect_map.skel.h xdp_redirect.skel.h xdp_monitor.skel.h \
- xdp_router_ipv4.skel.h
- clean-files += $(LINKED_SKELS)
- xdp_redirect_cpu.skel.h-deps := xdp_redirect_cpu.bpf.o xdp_sample.bpf.o
- xdp_redirect_map_multi.skel.h-deps := xdp_redirect_map_multi.bpf.o xdp_sample.bpf.o
- xdp_redirect_map.skel.h-deps := xdp_redirect_map.bpf.o xdp_sample.bpf.o
- xdp_redirect.skel.h-deps := xdp_redirect.bpf.o xdp_sample.bpf.o
- xdp_monitor.skel.h-deps := xdp_monitor.bpf.o xdp_sample.bpf.o
- xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o
- LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
- BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c))
- BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED))
- BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS))
- $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL)
- @echo " BPF GEN-OBJ " $(@:.skel.h=)
- $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps))
- @echo " BPF GEN-SKEL" $(@:.skel.h=)
- $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@
- # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
- # But, there is no easy way to fix it, so just exclude it since it is
- # useless for BPF samples.
- # below we use long chain of commands, clang | opt | llvm-dis | llc,
- # to generate final object file. 'clang' compiles the source into IR
- # with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
- # processing (llvm12) and IR optimizations. 'llvm-dis' converts
- # 'opt' output to IR, and finally 'llc' generates bpf byte code.
- $(obj)/%.o: $(src)/%.c
- @echo " CLANG-bpf " $@
- $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
- -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
- -I$(LIBBPF_INCLUDE) \
- -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
- -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
- -Wno-gnu-variable-sized-type-not-at-end \
- -Wno-address-of-packed-member -Wno-tautological-compare \
- -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
- -fno-asynchronous-unwind-tables \
- -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
- -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
- $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
- $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
- ifeq ($(DWARF2BTF),y)
- $(BTF_PAHOLE) -J $@
- endif
|