| # 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 += xdpsock |
| tprogs-y += xdpsock_ctrl_proc |
| tprogs-y += xsk_fwd |
| 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 |
| xdpsock-objs := xdpsock_user.o |
| xdpsock_ctrl_proc-objs := xdpsock_ctrl_proc.o |
| xsk_fwd-objs := xsk_fwd.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 := $(tprogs-y) |
| always-y += sockex1_kern.o |
| always-y += sockex2_kern.o |
| always-y += sockex3_kern.o |
| always-y += tracex1_kern.o |
| always-y += tracex2_kern.o |
| always-y += tracex3_kern.o |
| always-y += tracex4_kern.o |
| always-y += tracex5_kern.o |
| always-y += tracex6_kern.o |
| always-y += tracex7_kern.o |
| always-y += sock_flags_kern.o |
| always-y += test_probe_write_user_kern.o |
| always-y += trace_output_kern.o |
| always-y += tcbpf1_kern.o |
| always-y += tc_l2_redirect_kern.o |
| always-y += lathist_kern.o |
| always-y += offwaketime_kern.o |
| always-y += spintest_kern.o |
| always-y += map_perf_test_kern.o |
| always-y += test_overhead_tp_kern.o |
| always-y += test_overhead_raw_tp_kern.o |
| always-y += test_overhead_kprobe_kern.o |
| always-y += parse_varlen.o parse_simple.o parse_ldabs.o |
| always-y += test_cgrp2_tc_kern.o |
| always-y += xdp1_kern.o |
| always-y += xdp2_kern.o |
| always-y += test_current_task_under_cgroup_kern.o |
| always-y += trace_event_kern.o |
| always-y += sampleip_kern.o |
| always-y += lwt_len_hist_kern.o |
| always-y += xdp_tx_iptunnel_kern.o |
| always-y += test_map_in_map_kern.o |
| always-y += tcp_synrto_kern.o |
| always-y += tcp_rwnd_kern.o |
| always-y += tcp_bufs_kern.o |
| always-y += tcp_cong_kern.o |
| always-y += tcp_iw_kern.o |
| always-y += tcp_clamp_kern.o |
| always-y += tcp_basertt_kern.o |
| always-y += tcp_tos_reflect_kern.o |
| always-y += tcp_dumpstats_kern.o |
| always-y += xdp_rxq_info_kern.o |
| always-y += xdp2skb_meta_kern.o |
| always-y += syscall_tp_kern.o |
| always-y += cpustat_kern.o |
| always-y += xdp_adjust_tail_kern.o |
| always-y += xdp_fwd_kern.o |
| always-y += task_fd_query_kern.o |
| always-y += xdp_sample_pkts_kern.o |
| always-y += ibumad_kern.o |
| always-y += hbm_out_kern.o |
| always-y += hbm_edt_kern.o |
| always-y += xdpsock_kern.o |
| |
| ifeq ($(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 += $(LIBBPF) -lelf -lz |
| TPROGLDLIBS_xdp_monitor += -lm |
| TPROGLDLIBS_xdp_redirect += -lm |
| TPROGLDLIBS_xdp_redirect_cpu += -lm |
| TPROGLDLIBS_xdp_redirect_map += -lm |
| TPROGLDLIBS_xdp_redirect_map_multi += -lm |
| TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread |
| TPROGLDLIBS_tracex4 += -lrt |
| TPROGLDLIBS_trace_output += -lrt |
| TPROGLDLIBS_map_perf_test += -lrt |
| TPROGLDLIBS_test_overhead += -lrt |
| TPROGLDLIBS_xdpsock += -pthread -lcap |
| TPROGLDLIBS_xsk_fwd += -pthread |
| |
| # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: |
| # make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang |
| LLC ?= llc |
| CLANG ?= clang |
| OPT ?= opt |
| LLVM_DIS ?= llvm-dis |
| LLVM_OBJCOPY ?= llvm-objcopy |
| LLVM_READELF ?= llvm-readelf |
| BTF_PAHOLE ?= pahole |
| |
| # Detect that we're cross compiling and use the cross compiler |
| ifdef CROSS_COMPILE |
| CLANG_ARCH_ARGS = --target=$(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)/bpftool |
| $(BPFTOOL): $(LIBBPF) $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) |
| $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ |
| OUTPUT=$(BPFTOOL_OUTPUT)/ \ |
| LIBBPF_OUTPUT=$(LIBBPF_OUTPUT)/ \ |
| LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/ |
| |
| $(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 |