1# SPDX-License-Identifier: GPL-2.0 2 3BPF_SAMPLES_PATH ?= $(abspath $(src)) 4TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools 5 6pound := \# 7 8# List of programs to build 9tprogs-y := test_lru_dist 10tprogs-y += sock_example 11tprogs-y += fds_example 12tprogs-y += sockex1 13tprogs-y += sockex2 14tprogs-y += sockex3 15tprogs-y += tracex1 16tprogs-y += tracex3 17tprogs-y += tracex4 18tprogs-y += tracex5 19tprogs-y += tracex6 20tprogs-y += tracex7 21tprogs-y += test_probe_write_user 22tprogs-y += trace_output 23tprogs-y += lathist 24tprogs-y += offwaketime 25tprogs-y += spintest 26tprogs-y += map_perf_test 27tprogs-y += test_overhead 28tprogs-y += test_cgrp2_array_pin 29tprogs-y += test_cgrp2_attach 30tprogs-y += xdp_router_ipv4 31tprogs-y += test_current_task_under_cgroup 32tprogs-y += trace_event 33tprogs-y += sampleip 34tprogs-y += tc_l2_redirect 35tprogs-y += lwt_len_hist 36tprogs-y += xdp_tx_iptunnel 37tprogs-y += test_map_in_map 38tprogs-y += per_socket_stats_example 39tprogs-y += syscall_tp 40tprogs-y += cpustat 41tprogs-y += xdp_adjust_tail 42tprogs-y += xdp_fwd 43tprogs-y += task_fd_query 44tprogs-y += ibumad 45tprogs-y += hbm 46 47# Libbpf dependencies 48LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf 49LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf 50LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) 51LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include 52LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a 53 54CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 55TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o 56XDP_SAMPLE := xdp_sample_user.o 57 58fds_example-objs := fds_example.o 59sockex1-objs := sockex1_user.o 60sockex2-objs := sockex2_user.o 61sockex3-objs := sockex3_user.o 62tracex1-objs := tracex1_user.o $(TRACE_HELPERS) 63tracex3-objs := tracex3_user.o 64tracex4-objs := tracex4_user.o 65tracex5-objs := tracex5_user.o $(TRACE_HELPERS) 66tracex6-objs := tracex6_user.o 67tracex7-objs := tracex7_user.o 68test_probe_write_user-objs := test_probe_write_user_user.o 69trace_output-objs := trace_output_user.o 70lathist-objs := lathist_user.o 71offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS) 72spintest-objs := spintest_user.o $(TRACE_HELPERS) 73map_perf_test-objs := map_perf_test_user.o 74test_overhead-objs := test_overhead_user.o 75test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o 76test_cgrp2_attach-objs := test_cgrp2_attach.o 77test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ 78 test_current_task_under_cgroup_user.o 79trace_event-objs := trace_event_user.o $(TRACE_HELPERS) 80sampleip-objs := sampleip_user.o $(TRACE_HELPERS) 81tc_l2_redirect-objs := tc_l2_redirect_user.o 82lwt_len_hist-objs := lwt_len_hist_user.o 83xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 84test_map_in_map-objs := test_map_in_map_user.o 85per_socket_stats_example-objs := cookie_uid_helper_example.o 86syscall_tp-objs := syscall_tp_user.o 87cpustat-objs := cpustat_user.o 88xdp_adjust_tail-objs := xdp_adjust_tail_user.o 89xdp_fwd-objs := xdp_fwd_user.o 90task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) 91ibumad-objs := ibumad_user.o 92hbm-objs := hbm.o $(CGROUP_HELPERS) 93 94xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE) 95 96# Tell kbuild to always build the programs 97always-y := $(tprogs-y) 98always-y += sockex1_kern.o 99always-y += sockex2_kern.o 100always-y += sockex3_kern.o 101always-y += tracex1.bpf.o 102always-y += tracex3.bpf.o 103always-y += tracex4.bpf.o 104always-y += tracex5.bpf.o 105always-y += tracex6.bpf.o 106always-y += tracex7.bpf.o 107always-y += test_probe_write_user.bpf.o 108always-y += trace_output.bpf.o 109always-y += tcbpf1_kern.o 110always-y += tc_l2_redirect_kern.o 111always-y += lathist_kern.o 112always-y += offwaketime.bpf.o 113always-y += spintest.bpf.o 114always-y += map_perf_test.bpf.o 115always-y += test_overhead_tp.bpf.o 116always-y += test_overhead_raw_tp.bpf.o 117always-y += test_overhead_kprobe.bpf.o 118always-y += parse_varlen.o parse_simple.o parse_ldabs.o 119always-y += test_cgrp2_tc.bpf.o 120always-y += test_current_task_under_cgroup.bpf.o 121always-y += trace_event_kern.o 122always-y += sampleip_kern.o 123always-y += lwt_len_hist.bpf.o 124always-y += xdp_tx_iptunnel_kern.o 125always-y += test_map_in_map.bpf.o 126always-y += tcp_synrto_kern.o 127always-y += tcp_rwnd_kern.o 128always-y += tcp_bufs_kern.o 129always-y += tcp_cong_kern.o 130always-y += tcp_iw_kern.o 131always-y += tcp_clamp_kern.o 132always-y += tcp_basertt_kern.o 133always-y += tcp_tos_reflect_kern.o 134always-y += tcp_dumpstats_kern.o 135always-y += xdp2skb_meta_kern.o 136always-y += syscall_tp_kern.o 137always-y += cpustat_kern.o 138always-y += xdp_adjust_tail_kern.o 139always-y += xdp_fwd_kern.o 140always-y += task_fd_query_kern.o 141always-y += ibumad_kern.o 142always-y += hbm_out_kern.o 143always-y += hbm_edt_kern.o 144 145TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS) 146TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS) 147 148ifeq ($(ARCH), arm) 149# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux 150# headers when arm instruction set identification is requested. 151ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS)) 152BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 153TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 154endif 155 156ifeq ($(ARCH), mips) 157TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ 158ifdef CONFIG_MACH_LOONGSON64 159BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64 160BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic 161endif 162endif 163 164ifeq ($(ARCH), x86) 165BPF_EXTRA_CFLAGS += -fcf-protection 166endif 167 168TPROGS_CFLAGS += -Wall -O2 169TPROGS_CFLAGS += -Wmissing-prototypes 170TPROGS_CFLAGS += -Wstrict-prototypes 171TPROGS_CFLAGS += $(call try-run,\ 172 printf "int main() { return 0; }" |\ 173 $(CC) -Werror -fsanitize=bounds -x c - -o "$$TMP",-fsanitize=bounds,) 174 175TPROGS_CFLAGS += -I$(objtree)/usr/include 176TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 177TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) 178TPROGS_CFLAGS += -I$(srctree)/tools/include 179TPROGS_CFLAGS += -I$(srctree)/tools/perf 180TPROGS_CFLAGS += -I$(srctree)/tools/lib 181TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 182 183ifdef SYSROOT 184TPROGS_CFLAGS += --sysroot=$(SYSROOT) 185TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 186endif 187 188TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 189TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread 190TPROGLDLIBS_tracex4 += -lrt 191TPROGLDLIBS_trace_output += -lrt 192TPROGLDLIBS_map_perf_test += -lrt 193TPROGLDLIBS_test_overhead += -lrt 194 195# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 196# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang 197LLC ?= llc 198CLANG ?= clang 199OPT ?= opt 200LLVM_DIS ?= llvm-dis 201LLVM_OBJCOPY ?= llvm-objcopy 202LLVM_READELF ?= llvm-readelf 203BTF_PAHOLE ?= pahole 204 205# Detect that we're cross compiling and use the cross compiler 206ifdef CROSS_COMPILE 207CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 208endif 209 210# Don't evaluate probes and warnings if we need to run make recursively 211ifneq ($(src),) 212HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 213 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 214 -o /dev/null 2>/dev/null && echo okay) 215 216ifeq ($(HDR_PROBE),) 217$(warning WARNING: Detected possible issues with include path.) 218$(warning WARNING: Please install kernel headers locally (make headers_install).) 219endif 220 221BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 222BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 223BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 224BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 225 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 226 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ 227 /bin/rm -f ./llvm_btf_verify.o) 228 229BPF_EXTRA_CFLAGS += -fno-stack-protector 230ifneq ($(BTF_LLVM_PROBE),) 231 BPF_EXTRA_CFLAGS += -g 232else 233ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 234 BPF_EXTRA_CFLAGS += -g 235 LLC_FLAGS += -mattr=dwarfris 236 DWARF2BTF = y 237endif 238endif 239endif 240 241# Trick to allow make to be run from this directory 242all: 243 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 244 245clean: 246 $(MAKE) -C ../../ M=$(CURDIR) clean 247 @find $(CURDIR) -type f -name '*~' -delete 248 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool 249 250$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 251# Fix up variables inherited from Kbuild that tools/ build system won't like 252 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 253 LDFLAGS="$(TPROGS_LDFLAGS)" srctree=$(BPF_SAMPLES_PATH)/../../ \ 254 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \ 255 $@ install_headers 256 257BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 258BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool 259DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool 260BPFTOOL ?= $(DEFAULT_BPFTOOL) 261$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) 262 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ 263 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap 264 265$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 266 $(call msg,MKDIR,$@) 267 $(Q)mkdir -p $@ 268 269$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 270 $(call filechk,offsets,__SYSCALL_NRS_H__) 271 272targets += syscall_nrs.s 273clean-files += syscall_nrs.h 274 275FORCE: 276 277 278# Verify LLVM compiler tools are available and bpf target is supported by llc 279.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 280 281verify_cmds: $(CLANG) $(LLC) 282 @for TOOL in $^ ; do \ 283 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 284 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 285 exit 1; \ 286 else true; fi; \ 287 done 288 289verify_target_bpf: verify_cmds 290 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 291 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 292 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 293 exit 2; \ 294 else true; fi 295 296$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 297$(src)/*.c: verify_target_bpf $(LIBBPF) 298 299libbpf_hdrs: $(LIBBPF) 300$(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs 301 302.PHONY: libbpf_hdrs 303 304$(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h 305 306$(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h 307$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 308$(obj)/hbm.o: $(src)/hbm.h 309$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 310 311# Override includes for xdp_sample_user.o because $(srctree)/usr/include in 312# TPROGS_CFLAGS causes conflicts 313XDP_SAMPLE_CFLAGS += -Wall -O2 \ 314 -I$(src)/../../tools/include \ 315 -I$(src)/../../tools/include/uapi \ 316 -I$(LIBBPF_INCLUDE) \ 317 -I$(src)/../../tools/testing/selftests/bpf 318 319$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) $(TPROGS_USER_CFLAGS) 320$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h 321# Override includes for trace_helpers.o because __must_check won't be defined 322# in our include path. 323$(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TPROGS_CFLAGS) -D__must_check= 324 325-include $(BPF_SAMPLES_PATH)/Makefile.target 326 327VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \ 328 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \ 329 $(abspath ./vmlinux) 330VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 331 332$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) 333ifeq ($(VMLINUX_H),) 334ifeq ($(VMLINUX_BTF),) 335 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\ 336 build the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable) 337endif 338 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 339else 340 $(Q)cp "$(VMLINUX_H)" $@ 341endif 342 343clean-files += vmlinux.h 344 345# Get Clang's default includes on this system, as opposed to those seen by 346# '--target=bpf'. This fixes "missing" files on some architectures/distros, 347# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 348# 349# Use '-idirafter': Don't interfere with include mechanics except where the 350# build would have failed anyways. 351define get_sys_includes 352$(shell $(1) -v -E - </dev/null 2>&1 \ 353 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 354$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/') 355endef 356 357CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 358 359$(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o 360 361$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h 362 @echo " CLANG-BPF " $@ 363 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \ 364 -Wno-compare-distinct-pointer-types -I$(srctree)/include \ 365 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ 366 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ 367 -c $(filter %.bpf.c,$^) -o $@ 368 369LINKED_SKELS := xdp_router_ipv4.skel.h 370clean-files += $(LINKED_SKELS) 371 372xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o 373 374LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps))) 375 376BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) 377BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) 378BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) 379 380$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL) 381 @echo " BPF GEN-OBJ " $(@:.skel.h=) 382 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps)) 383 @echo " BPF GEN-SKEL" $(@:.skel.h=) 384 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@ 385 386# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 387# But, there is no easy way to fix it, so just exclude it since it is 388# useless for BPF samples. 389# below we use long chain of commands, clang | opt | llvm-dis | llc, 390# to generate final object file. 'clang' compiles the source into IR 391# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin 392# processing (llvm12) and IR optimizations. 'llvm-dis' converts 393# 'opt' output to IR, and finally 'llc' generates bpf byte code. 394$(obj)/%.o: $(src)/%.c 395 @echo " CLANG-bpf " $@ 396 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \ 397 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \ 398 -I$(LIBBPF_INCLUDE) \ 399 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 400 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 401 -Wno-gnu-variable-sized-type-not-at-end \ 402 -Wno-address-of-packed-member -Wno-tautological-compare \ 403 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 404 -fno-asynchronous-unwind-tables \ 405 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 406 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ 407 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ 408 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 409ifeq ($(DWARF2BTF),y) 410 $(BTF_PAHOLE) -J $@ 411endif 412