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 += test_cgrp2_sock 31tprogs-y += test_cgrp2_sock2 32tprogs-y += xdp_router_ipv4 33tprogs-y += test_current_task_under_cgroup 34tprogs-y += trace_event 35tprogs-y += sampleip 36tprogs-y += tc_l2_redirect 37tprogs-y += lwt_len_hist 38tprogs-y += xdp_tx_iptunnel 39tprogs-y += test_map_in_map 40tprogs-y += per_socket_stats_example 41tprogs-y += syscall_tp 42tprogs-y += cpustat 43tprogs-y += xdp_adjust_tail 44tprogs-y += xdp_fwd 45tprogs-y += task_fd_query 46tprogs-y += ibumad 47tprogs-y += hbm 48 49# Libbpf dependencies 50LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf 51LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf 52LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) 53LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include 54LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a 55 56CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 57TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o 58XDP_SAMPLE := xdp_sample_user.o 59 60fds_example-objs := fds_example.o 61sockex1-objs := sockex1_user.o 62sockex2-objs := sockex2_user.o 63sockex3-objs := sockex3_user.o 64tracex1-objs := tracex1_user.o $(TRACE_HELPERS) 65tracex3-objs := tracex3_user.o 66tracex4-objs := tracex4_user.o 67tracex5-objs := tracex5_user.o $(TRACE_HELPERS) 68tracex6-objs := tracex6_user.o 69tracex7-objs := tracex7_user.o 70test_probe_write_user-objs := test_probe_write_user_user.o 71trace_output-objs := trace_output_user.o 72lathist-objs := lathist_user.o 73offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS) 74spintest-objs := spintest_user.o $(TRACE_HELPERS) 75map_perf_test-objs := map_perf_test_user.o 76test_overhead-objs := test_overhead_user.o 77test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o 78test_cgrp2_attach-objs := test_cgrp2_attach.o 79test_cgrp2_sock-objs := test_cgrp2_sock.o 80test_cgrp2_sock2-objs := test_cgrp2_sock2.o 81test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ 82 test_current_task_under_cgroup_user.o 83trace_event-objs := trace_event_user.o $(TRACE_HELPERS) 84sampleip-objs := sampleip_user.o $(TRACE_HELPERS) 85tc_l2_redirect-objs := tc_l2_redirect_user.o 86lwt_len_hist-objs := lwt_len_hist_user.o 87xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 88test_map_in_map-objs := test_map_in_map_user.o 89per_socket_stats_example-objs := cookie_uid_helper_example.o 90syscall_tp-objs := syscall_tp_user.o 91cpustat-objs := cpustat_user.o 92xdp_adjust_tail-objs := xdp_adjust_tail_user.o 93xdp_fwd-objs := xdp_fwd_user.o 94task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) 95ibumad-objs := ibumad_user.o 96hbm-objs := hbm.o $(CGROUP_HELPERS) 97 98xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE) 99 100# Tell kbuild to always build the programs 101always-y := $(tprogs-y) 102always-y += sockex1_kern.o 103always-y += sockex2_kern.o 104always-y += sockex3_kern.o 105always-y += tracex1.bpf.o 106always-y += tracex3.bpf.o 107always-y += tracex4.bpf.o 108always-y += tracex5.bpf.o 109always-y += tracex6.bpf.o 110always-y += tracex7.bpf.o 111always-y += sock_flags.bpf.o 112always-y += test_probe_write_user.bpf.o 113always-y += trace_output.bpf.o 114always-y += tcbpf1_kern.o 115always-y += tc_l2_redirect_kern.o 116always-y += lathist_kern.o 117always-y += offwaketime.bpf.o 118always-y += spintest.bpf.o 119always-y += map_perf_test.bpf.o 120always-y += test_overhead_tp.bpf.o 121always-y += test_overhead_raw_tp.bpf.o 122always-y += test_overhead_kprobe.bpf.o 123always-y += parse_varlen.o parse_simple.o parse_ldabs.o 124always-y += test_cgrp2_tc.bpf.o 125always-y += test_current_task_under_cgroup.bpf.o 126always-y += trace_event_kern.o 127always-y += sampleip_kern.o 128always-y += lwt_len_hist.bpf.o 129always-y += xdp_tx_iptunnel_kern.o 130always-y += test_map_in_map.bpf.o 131always-y += tcp_synrto_kern.o 132always-y += tcp_rwnd_kern.o 133always-y += tcp_bufs_kern.o 134always-y += tcp_cong_kern.o 135always-y += tcp_iw_kern.o 136always-y += tcp_clamp_kern.o 137always-y += tcp_basertt_kern.o 138always-y += tcp_tos_reflect_kern.o 139always-y += tcp_dumpstats_kern.o 140always-y += xdp2skb_meta_kern.o 141always-y += syscall_tp_kern.o 142always-y += cpustat_kern.o 143always-y += xdp_adjust_tail_kern.o 144always-y += xdp_fwd_kern.o 145always-y += task_fd_query_kern.o 146always-y += ibumad_kern.o 147always-y += hbm_out_kern.o 148always-y += hbm_edt_kern.o 149 150TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS) 151TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS) 152 153ifeq ($(ARCH), arm) 154# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux 155# headers when arm instruction set identification is requested. 156ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS)) 157BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 158TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 159endif 160 161ifeq ($(ARCH), mips) 162TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ 163ifdef CONFIG_MACH_LOONGSON64 164BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64 165BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic 166endif 167endif 168 169ifeq ($(ARCH), x86) 170BPF_EXTRA_CFLAGS += -fcf-protection 171endif 172 173TPROGS_CFLAGS += -Wall -O2 174TPROGS_CFLAGS += -Wmissing-prototypes 175TPROGS_CFLAGS += -Wstrict-prototypes 176TPROGS_CFLAGS += $(call try-run,\ 177 printf "int main() { return 0; }" |\ 178 $(CC) -Werror -fsanitize=bounds -x c - -o "$$TMP",-fsanitize=bounds,) 179 180TPROGS_CFLAGS += -I$(objtree)/usr/include 181TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 182TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) 183TPROGS_CFLAGS += -I$(srctree)/tools/include 184TPROGS_CFLAGS += -I$(srctree)/tools/perf 185TPROGS_CFLAGS += -I$(srctree)/tools/lib 186TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 187 188ifdef SYSROOT 189TPROGS_CFLAGS += --sysroot=$(SYSROOT) 190TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 191endif 192 193TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 194TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread 195TPROGLDLIBS_tracex4 += -lrt 196TPROGLDLIBS_trace_output += -lrt 197TPROGLDLIBS_map_perf_test += -lrt 198TPROGLDLIBS_test_overhead += -lrt 199 200# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 201# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang 202LLC ?= llc 203CLANG ?= clang 204OPT ?= opt 205LLVM_DIS ?= llvm-dis 206LLVM_OBJCOPY ?= llvm-objcopy 207LLVM_READELF ?= llvm-readelf 208BTF_PAHOLE ?= pahole 209 210# Detect that we're cross compiling and use the cross compiler 211ifdef CROSS_COMPILE 212CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 213endif 214 215# Don't evaluate probes and warnings if we need to run make recursively 216ifneq ($(src),) 217HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 218 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 219 -o /dev/null 2>/dev/null && echo okay) 220 221ifeq ($(HDR_PROBE),) 222$(warning WARNING: Detected possible issues with include path.) 223$(warning WARNING: Please install kernel headers locally (make headers_install).) 224endif 225 226BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 227BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 228BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 229BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 230 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 231 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ 232 /bin/rm -f ./llvm_btf_verify.o) 233 234BPF_EXTRA_CFLAGS += -fno-stack-protector 235ifneq ($(BTF_LLVM_PROBE),) 236 BPF_EXTRA_CFLAGS += -g 237else 238ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 239 BPF_EXTRA_CFLAGS += -g 240 LLC_FLAGS += -mattr=dwarfris 241 DWARF2BTF = y 242endif 243endif 244endif 245 246# Trick to allow make to be run from this directory 247all: 248 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 249 250clean: 251 $(MAKE) -C ../../ M=$(CURDIR) clean 252 @find $(CURDIR) -type f -name '*~' -delete 253 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool 254 255$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 256# Fix up variables inherited from Kbuild that tools/ build system won't like 257 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 258 LDFLAGS="$(TPROGS_LDFLAGS)" srctree=$(BPF_SAMPLES_PATH)/../../ \ 259 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \ 260 $@ install_headers 261 262BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 263BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool 264DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool 265BPFTOOL ?= $(DEFAULT_BPFTOOL) 266$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) 267 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ 268 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap 269 270$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 271 $(call msg,MKDIR,$@) 272 $(Q)mkdir -p $@ 273 274$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 275 $(call filechk,offsets,__SYSCALL_NRS_H__) 276 277targets += syscall_nrs.s 278clean-files += syscall_nrs.h 279 280FORCE: 281 282 283# Verify LLVM compiler tools are available and bpf target is supported by llc 284.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 285 286verify_cmds: $(CLANG) $(LLC) 287 @for TOOL in $^ ; do \ 288 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 289 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 290 exit 1; \ 291 else true; fi; \ 292 done 293 294verify_target_bpf: verify_cmds 295 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 296 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 297 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 298 exit 2; \ 299 else true; fi 300 301$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 302$(src)/*.c: verify_target_bpf $(LIBBPF) 303 304libbpf_hdrs: $(LIBBPF) 305$(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs 306 307.PHONY: libbpf_hdrs 308 309$(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h 310 311$(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h 312$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 313$(obj)/hbm.o: $(src)/hbm.h 314$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 315 316# Override includes for xdp_sample_user.o because $(srctree)/usr/include in 317# TPROGS_CFLAGS causes conflicts 318XDP_SAMPLE_CFLAGS += -Wall -O2 \ 319 -I$(src)/../../tools/include \ 320 -I$(src)/../../tools/include/uapi \ 321 -I$(LIBBPF_INCLUDE) \ 322 -I$(src)/../../tools/testing/selftests/bpf 323 324$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) $(TPROGS_USER_CFLAGS) 325$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h 326# Override includes for trace_helpers.o because __must_check won't be defined 327# in our include path. 328$(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TPROGS_CFLAGS) -D__must_check= 329 330-include $(BPF_SAMPLES_PATH)/Makefile.target 331 332VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \ 333 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \ 334 $(abspath ./vmlinux) 335VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 336 337$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) 338ifeq ($(VMLINUX_H),) 339ifeq ($(VMLINUX_BTF),) 340 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\ 341 build the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable) 342endif 343 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 344else 345 $(Q)cp "$(VMLINUX_H)" $@ 346endif 347 348clean-files += vmlinux.h 349 350# Get Clang's default includes on this system, as opposed to those seen by 351# '--target=bpf'. This fixes "missing" files on some architectures/distros, 352# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 353# 354# Use '-idirafter': Don't interfere with include mechanics except where the 355# build would have failed anyways. 356define get_sys_includes 357$(shell $(1) -v -E - </dev/null 2>&1 \ 358 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 359$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/') 360endef 361 362CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 363 364$(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o 365 366$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h 367 @echo " CLANG-BPF " $@ 368 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \ 369 -Wno-compare-distinct-pointer-types -I$(srctree)/include \ 370 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ 371 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ 372 -c $(filter %.bpf.c,$^) -o $@ 373 374LINKED_SKELS := xdp_router_ipv4.skel.h 375clean-files += $(LINKED_SKELS) 376 377xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o 378 379LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps))) 380 381BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) 382BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) 383BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) 384 385$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL) 386 @echo " BPF GEN-OBJ " $(@:.skel.h=) 387 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps)) 388 @echo " BPF GEN-SKEL" $(@:.skel.h=) 389 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@ 390 391# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 392# But, there is no easy way to fix it, so just exclude it since it is 393# useless for BPF samples. 394# below we use long chain of commands, clang | opt | llvm-dis | llc, 395# to generate final object file. 'clang' compiles the source into IR 396# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin 397# processing (llvm12) and IR optimizations. 'llvm-dis' converts 398# 'opt' output to IR, and finally 'llc' generates bpf byte code. 399$(obj)/%.o: $(src)/%.c 400 @echo " CLANG-bpf " $@ 401 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \ 402 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \ 403 -I$(LIBBPF_INCLUDE) \ 404 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 405 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 406 -Wno-gnu-variable-sized-type-not-at-end \ 407 -Wno-address-of-packed-member -Wno-tautological-compare \ 408 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 409 -fno-asynchronous-unwind-tables \ 410 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 411 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ 412 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ 413 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 414ifeq ($(DWARF2BTF),y) 415 $(BTF_PAHOLE) -J $@ 416endif 417