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_sock2 31tprogs-y += xdp_router_ipv4 32tprogs-y += test_current_task_under_cgroup 33tprogs-y += trace_event 34tprogs-y += sampleip 35tprogs-y += tc_l2_redirect 36tprogs-y += lwt_len_hist 37tprogs-y += xdp_tx_iptunnel 38tprogs-y += test_map_in_map 39tprogs-y += per_socket_stats_example 40tprogs-y += syscall_tp 41tprogs-y += cpustat 42tprogs-y += xdp_adjust_tail 43tprogs-y += xdp_fwd 44tprogs-y += task_fd_query 45tprogs-y += ibumad 46tprogs-y += hbm 47 48# Libbpf dependencies 49LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf 50LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf 51LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) 52LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include 53LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a 54 55CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 56TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o 57XDP_SAMPLE := xdp_sample_user.o 58 59fds_example-objs := fds_example.o 60sockex1-objs := sockex1_user.o 61sockex2-objs := sockex2_user.o 62sockex3-objs := sockex3_user.o 63tracex1-objs := tracex1_user.o $(TRACE_HELPERS) 64tracex3-objs := tracex3_user.o 65tracex4-objs := tracex4_user.o 66tracex5-objs := tracex5_user.o $(TRACE_HELPERS) 67tracex6-objs := tracex6_user.o 68tracex7-objs := tracex7_user.o 69test_probe_write_user-objs := test_probe_write_user_user.o 70trace_output-objs := trace_output_user.o 71lathist-objs := lathist_user.o 72offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS) 73spintest-objs := spintest_user.o $(TRACE_HELPERS) 74map_perf_test-objs := map_perf_test_user.o 75test_overhead-objs := test_overhead_user.o 76test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o 77test_cgrp2_attach-objs := test_cgrp2_attach.o 78test_cgrp2_sock2-objs := test_cgrp2_sock2.o 79test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ 80 test_current_task_under_cgroup_user.o 81trace_event-objs := trace_event_user.o $(TRACE_HELPERS) 82sampleip-objs := sampleip_user.o $(TRACE_HELPERS) 83tc_l2_redirect-objs := tc_l2_redirect_user.o 84lwt_len_hist-objs := lwt_len_hist_user.o 85xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 86test_map_in_map-objs := test_map_in_map_user.o 87per_socket_stats_example-objs := cookie_uid_helper_example.o 88syscall_tp-objs := syscall_tp_user.o 89cpustat-objs := cpustat_user.o 90xdp_adjust_tail-objs := xdp_adjust_tail_user.o 91xdp_fwd-objs := xdp_fwd_user.o 92task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) 93ibumad-objs := ibumad_user.o 94hbm-objs := hbm.o $(CGROUP_HELPERS) 95 96xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE) 97 98# Tell kbuild to always build the programs 99always-y := $(tprogs-y) 100always-y += sockex1_kern.o 101always-y += sockex2_kern.o 102always-y += sockex3_kern.o 103always-y += tracex1.bpf.o 104always-y += tracex3.bpf.o 105always-y += tracex4.bpf.o 106always-y += tracex5.bpf.o 107always-y += tracex6.bpf.o 108always-y += tracex7.bpf.o 109always-y += sock_flags.bpf.o 110always-y += test_probe_write_user.bpf.o 111always-y += trace_output.bpf.o 112always-y += tcbpf1_kern.o 113always-y += tc_l2_redirect_kern.o 114always-y += lathist_kern.o 115always-y += offwaketime.bpf.o 116always-y += spintest.bpf.o 117always-y += map_perf_test.bpf.o 118always-y += test_overhead_tp.bpf.o 119always-y += test_overhead_raw_tp.bpf.o 120always-y += test_overhead_kprobe.bpf.o 121always-y += parse_varlen.o parse_simple.o parse_ldabs.o 122always-y += test_cgrp2_tc.bpf.o 123always-y += test_current_task_under_cgroup.bpf.o 124always-y += trace_event_kern.o 125always-y += sampleip_kern.o 126always-y += lwt_len_hist.bpf.o 127always-y += xdp_tx_iptunnel_kern.o 128always-y += test_map_in_map.bpf.o 129always-y += tcp_synrto_kern.o 130always-y += tcp_rwnd_kern.o 131always-y += tcp_bufs_kern.o 132always-y += tcp_cong_kern.o 133always-y += tcp_iw_kern.o 134always-y += tcp_clamp_kern.o 135always-y += tcp_basertt_kern.o 136always-y += tcp_tos_reflect_kern.o 137always-y += tcp_dumpstats_kern.o 138always-y += xdp2skb_meta_kern.o 139always-y += syscall_tp_kern.o 140always-y += cpustat_kern.o 141always-y += xdp_adjust_tail_kern.o 142always-y += xdp_fwd_kern.o 143always-y += task_fd_query_kern.o 144always-y += ibumad_kern.o 145always-y += hbm_out_kern.o 146always-y += hbm_edt_kern.o 147 148TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS) 149TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS) 150 151ifeq ($(ARCH), arm) 152# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux 153# headers when arm instruction set identification is requested. 154ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS)) 155BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 156TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 157endif 158 159ifeq ($(ARCH), mips) 160TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ 161ifdef CONFIG_MACH_LOONGSON64 162BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64 163BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic 164endif 165endif 166 167ifeq ($(ARCH), x86) 168BPF_EXTRA_CFLAGS += -fcf-protection 169endif 170 171TPROGS_CFLAGS += -Wall -O2 172TPROGS_CFLAGS += -Wmissing-prototypes 173TPROGS_CFLAGS += -Wstrict-prototypes 174TPROGS_CFLAGS += $(call try-run,\ 175 printf "int main() { return 0; }" |\ 176 $(CC) -Werror -fsanitize=bounds -x c - -o "$$TMP",-fsanitize=bounds,) 177 178TPROGS_CFLAGS += -I$(objtree)/usr/include 179TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 180TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) 181TPROGS_CFLAGS += -I$(srctree)/tools/include 182TPROGS_CFLAGS += -I$(srctree)/tools/perf 183TPROGS_CFLAGS += -I$(srctree)/tools/lib 184TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 185 186ifdef SYSROOT 187TPROGS_CFLAGS += --sysroot=$(SYSROOT) 188TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 189endif 190 191TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 192TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread 193TPROGLDLIBS_tracex4 += -lrt 194TPROGLDLIBS_trace_output += -lrt 195TPROGLDLIBS_map_perf_test += -lrt 196TPROGLDLIBS_test_overhead += -lrt 197 198# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 199# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang 200LLC ?= llc 201CLANG ?= clang 202OPT ?= opt 203LLVM_DIS ?= llvm-dis 204LLVM_OBJCOPY ?= llvm-objcopy 205LLVM_READELF ?= llvm-readelf 206BTF_PAHOLE ?= pahole 207 208# Detect that we're cross compiling and use the cross compiler 209ifdef CROSS_COMPILE 210CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 211endif 212 213# Don't evaluate probes and warnings if we need to run make recursively 214ifneq ($(src),) 215HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 216 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 217 -o /dev/null 2>/dev/null && echo okay) 218 219ifeq ($(HDR_PROBE),) 220$(warning WARNING: Detected possible issues with include path.) 221$(warning WARNING: Please install kernel headers locally (make headers_install).) 222endif 223 224BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 225BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 226BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 227BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 228 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 229 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ 230 /bin/rm -f ./llvm_btf_verify.o) 231 232BPF_EXTRA_CFLAGS += -fno-stack-protector 233ifneq ($(BTF_LLVM_PROBE),) 234 BPF_EXTRA_CFLAGS += -g 235else 236ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 237 BPF_EXTRA_CFLAGS += -g 238 LLC_FLAGS += -mattr=dwarfris 239 DWARF2BTF = y 240endif 241endif 242endif 243 244# Trick to allow make to be run from this directory 245all: 246 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 247 248clean: 249 $(MAKE) -C ../../ M=$(CURDIR) clean 250 @find $(CURDIR) -type f -name '*~' -delete 251 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool 252 253$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 254# Fix up variables inherited from Kbuild that tools/ build system won't like 255 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 256 LDFLAGS="$(TPROGS_LDFLAGS)" srctree=$(BPF_SAMPLES_PATH)/../../ \ 257 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \ 258 $@ install_headers 259 260BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 261BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool 262DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool 263BPFTOOL ?= $(DEFAULT_BPFTOOL) 264$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) 265 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ 266 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap 267 268$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 269 $(call msg,MKDIR,$@) 270 $(Q)mkdir -p $@ 271 272$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 273 $(call filechk,offsets,__SYSCALL_NRS_H__) 274 275targets += syscall_nrs.s 276clean-files += syscall_nrs.h 277 278FORCE: 279 280 281# Verify LLVM compiler tools are available and bpf target is supported by llc 282.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 283 284verify_cmds: $(CLANG) $(LLC) 285 @for TOOL in $^ ; do \ 286 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 287 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 288 exit 1; \ 289 else true; fi; \ 290 done 291 292verify_target_bpf: verify_cmds 293 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 294 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 295 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 296 exit 2; \ 297 else true; fi 298 299$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 300$(src)/*.c: verify_target_bpf $(LIBBPF) 301 302libbpf_hdrs: $(LIBBPF) 303$(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs 304 305.PHONY: libbpf_hdrs 306 307$(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h 308 309$(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h 310$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 311$(obj)/hbm.o: $(src)/hbm.h 312$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 313 314# Override includes for xdp_sample_user.o because $(srctree)/usr/include in 315# TPROGS_CFLAGS causes conflicts 316XDP_SAMPLE_CFLAGS += -Wall -O2 \ 317 -I$(src)/../../tools/include \ 318 -I$(src)/../../tools/include/uapi \ 319 -I$(LIBBPF_INCLUDE) \ 320 -I$(src)/../../tools/testing/selftests/bpf 321 322$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) $(TPROGS_USER_CFLAGS) 323$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h 324# Override includes for trace_helpers.o because __must_check won't be defined 325# in our include path. 326$(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TPROGS_CFLAGS) -D__must_check= 327 328-include $(BPF_SAMPLES_PATH)/Makefile.target 329 330VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \ 331 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \ 332 $(abspath ./vmlinux) 333VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 334 335$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) 336ifeq ($(VMLINUX_H),) 337ifeq ($(VMLINUX_BTF),) 338 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\ 339 build the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable) 340endif 341 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 342else 343 $(Q)cp "$(VMLINUX_H)" $@ 344endif 345 346clean-files += vmlinux.h 347 348# Get Clang's default includes on this system, as opposed to those seen by 349# '--target=bpf'. This fixes "missing" files on some architectures/distros, 350# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 351# 352# Use '-idirafter': Don't interfere with include mechanics except where the 353# build would have failed anyways. 354define get_sys_includes 355$(shell $(1) -v -E - </dev/null 2>&1 \ 356 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 357$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/') 358endef 359 360CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 361 362$(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o 363 364$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h 365 @echo " CLANG-BPF " $@ 366 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \ 367 -Wno-compare-distinct-pointer-types -I$(srctree)/include \ 368 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ 369 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ 370 -c $(filter %.bpf.c,$^) -o $@ 371 372LINKED_SKELS := xdp_router_ipv4.skel.h 373clean-files += $(LINKED_SKELS) 374 375xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o 376 377LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps))) 378 379BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) 380BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) 381BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) 382 383$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL) 384 @echo " BPF GEN-OBJ " $(@:.skel.h=) 385 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps)) 386 @echo " BPF GEN-SKEL" $(@:.skel.h=) 387 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@ 388 389# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 390# But, there is no easy way to fix it, so just exclude it since it is 391# useless for BPF samples. 392# below we use long chain of commands, clang | opt | llvm-dis | llc, 393# to generate final object file. 'clang' compiles the source into IR 394# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin 395# processing (llvm12) and IR optimizations. 'llvm-dis' converts 396# 'opt' output to IR, and finally 'llc' generates bpf byte code. 397$(obj)/%.o: $(src)/%.c 398 @echo " CLANG-bpf " $@ 399 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \ 400 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \ 401 -I$(LIBBPF_INCLUDE) \ 402 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 403 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 404 -Wno-gnu-variable-sized-type-not-at-end \ 405 -Wno-address-of-packed-member -Wno-tautological-compare \ 406 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 407 -fno-asynchronous-unwind-tables \ 408 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 409 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ 410 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ 411 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 412ifeq ($(DWARF2BTF),y) 413 $(BTF_PAHOLE) -J $@ 414endif 415