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 += tracex2 17tprogs-y += tracex3 18tprogs-y += tracex4 19tprogs-y += tracex5 20tprogs-y += tracex6 21tprogs-y += tracex7 22tprogs-y += test_probe_write_user 23tprogs-y += trace_output 24tprogs-y += lathist 25tprogs-y += offwaketime 26tprogs-y += spintest 27tprogs-y += map_perf_test 28tprogs-y += test_overhead 29tprogs-y += test_cgrp2_array_pin 30tprogs-y += test_cgrp2_attach 31tprogs-y += test_cgrp2_sock 32tprogs-y += test_cgrp2_sock2 33tprogs-y += xdp_router_ipv4 34tprogs-y += test_current_task_under_cgroup 35tprogs-y += trace_event 36tprogs-y += sampleip 37tprogs-y += tc_l2_redirect 38tprogs-y += lwt_len_hist 39tprogs-y += xdp_tx_iptunnel 40tprogs-y += test_map_in_map 41tprogs-y += per_socket_stats_example 42tprogs-y += syscall_tp 43tprogs-y += cpustat 44tprogs-y += xdp_adjust_tail 45tprogs-y += xdp_fwd 46tprogs-y += task_fd_query 47tprogs-y += ibumad 48tprogs-y += hbm 49 50# Libbpf dependencies 51LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf 52LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf 53LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) 54LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include 55LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a 56 57CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 58TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o 59XDP_SAMPLE := xdp_sample_user.o 60 61fds_example-objs := fds_example.o 62sockex1-objs := sockex1_user.o 63sockex2-objs := sockex2_user.o 64sockex3-objs := sockex3_user.o 65tracex1-objs := tracex1_user.o $(TRACE_HELPERS) 66tracex2-objs := tracex2_user.o 67tracex3-objs := tracex3_user.o 68tracex4-objs := tracex4_user.o 69tracex5-objs := tracex5_user.o $(TRACE_HELPERS) 70tracex6-objs := tracex6_user.o 71tracex7-objs := tracex7_user.o 72test_probe_write_user-objs := test_probe_write_user_user.o 73trace_output-objs := trace_output_user.o 74lathist-objs := lathist_user.o 75offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS) 76spintest-objs := spintest_user.o $(TRACE_HELPERS) 77map_perf_test-objs := map_perf_test_user.o 78test_overhead-objs := test_overhead_user.o 79test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o 80test_cgrp2_attach-objs := test_cgrp2_attach.o 81test_cgrp2_sock-objs := test_cgrp2_sock.o 82test_cgrp2_sock2-objs := test_cgrp2_sock2.o 83test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ 84 test_current_task_under_cgroup_user.o 85trace_event-objs := trace_event_user.o $(TRACE_HELPERS) 86sampleip-objs := sampleip_user.o $(TRACE_HELPERS) 87tc_l2_redirect-objs := tc_l2_redirect_user.o 88lwt_len_hist-objs := lwt_len_hist_user.o 89xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 90test_map_in_map-objs := test_map_in_map_user.o 91per_socket_stats_example-objs := cookie_uid_helper_example.o 92syscall_tp-objs := syscall_tp_user.o 93cpustat-objs := cpustat_user.o 94xdp_adjust_tail-objs := xdp_adjust_tail_user.o 95xdp_fwd-objs := xdp_fwd_user.o 96task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) 97ibumad-objs := ibumad_user.o 98hbm-objs := hbm.o $(CGROUP_HELPERS) 99 100xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE) 101 102# Tell kbuild to always build the programs 103always-y := $(tprogs-y) 104always-y += sockex1_kern.o 105always-y += sockex2_kern.o 106always-y += sockex3_kern.o 107always-y += tracex1.bpf.o 108always-y += tracex2.bpf.o 109always-y += tracex3.bpf.o 110always-y += tracex4.bpf.o 111always-y += tracex5.bpf.o 112always-y += tracex6.bpf.o 113always-y += tracex7.bpf.o 114always-y += sock_flags.bpf.o 115always-y += test_probe_write_user.bpf.o 116always-y += trace_output.bpf.o 117always-y += tcbpf1_kern.o 118always-y += tc_l2_redirect_kern.o 119always-y += lathist_kern.o 120always-y += offwaketime.bpf.o 121always-y += spintest.bpf.o 122always-y += map_perf_test.bpf.o 123always-y += test_overhead_tp.bpf.o 124always-y += test_overhead_raw_tp.bpf.o 125always-y += test_overhead_kprobe.bpf.o 126always-y += parse_varlen.o parse_simple.o parse_ldabs.o 127always-y += test_cgrp2_tc.bpf.o 128always-y += test_current_task_under_cgroup.bpf.o 129always-y += trace_event_kern.o 130always-y += sampleip_kern.o 131always-y += lwt_len_hist.bpf.o 132always-y += xdp_tx_iptunnel_kern.o 133always-y += test_map_in_map.bpf.o 134always-y += tcp_synrto_kern.o 135always-y += tcp_rwnd_kern.o 136always-y += tcp_bufs_kern.o 137always-y += tcp_cong_kern.o 138always-y += tcp_iw_kern.o 139always-y += tcp_clamp_kern.o 140always-y += tcp_basertt_kern.o 141always-y += tcp_tos_reflect_kern.o 142always-y += tcp_dumpstats_kern.o 143always-y += xdp2skb_meta_kern.o 144always-y += syscall_tp_kern.o 145always-y += cpustat_kern.o 146always-y += xdp_adjust_tail_kern.o 147always-y += xdp_fwd_kern.o 148always-y += task_fd_query_kern.o 149always-y += ibumad_kern.o 150always-y += hbm_out_kern.o 151always-y += hbm_edt_kern.o 152 153TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS) 154TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS) 155 156ifeq ($(ARCH), arm) 157# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux 158# headers when arm instruction set identification is requested. 159ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS)) 160BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 161TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 162endif 163 164ifeq ($(ARCH), mips) 165TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ 166ifdef CONFIG_MACH_LOONGSON64 167BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64 168BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic 169endif 170endif 171 172ifeq ($(ARCH), x86) 173BPF_EXTRA_CFLAGS += -fcf-protection 174endif 175 176TPROGS_CFLAGS += -Wall -O2 177TPROGS_CFLAGS += -Wmissing-prototypes 178TPROGS_CFLAGS += -Wstrict-prototypes 179TPROGS_CFLAGS += $(call try-run,\ 180 printf "int main() { return 0; }" |\ 181 $(CC) -Werror -fsanitize=bounds -x c - -o "$$TMP",-fsanitize=bounds,) 182 183TPROGS_CFLAGS += -I$(objtree)/usr/include 184TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 185TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) 186TPROGS_CFLAGS += -I$(srctree)/tools/include 187TPROGS_CFLAGS += -I$(srctree)/tools/perf 188TPROGS_CFLAGS += -I$(srctree)/tools/lib 189TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 190 191ifdef SYSROOT 192TPROGS_CFLAGS += --sysroot=$(SYSROOT) 193TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 194endif 195 196TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 197TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread 198TPROGLDLIBS_tracex4 += -lrt 199TPROGLDLIBS_trace_output += -lrt 200TPROGLDLIBS_map_perf_test += -lrt 201TPROGLDLIBS_test_overhead += -lrt 202 203# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 204# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang 205LLC ?= llc 206CLANG ?= clang 207OPT ?= opt 208LLVM_DIS ?= llvm-dis 209LLVM_OBJCOPY ?= llvm-objcopy 210LLVM_READELF ?= llvm-readelf 211BTF_PAHOLE ?= pahole 212 213# Detect that we're cross compiling and use the cross compiler 214ifdef CROSS_COMPILE 215CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 216endif 217 218# Don't evaluate probes and warnings if we need to run make recursively 219ifneq ($(src),) 220HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 221 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 222 -o /dev/null 2>/dev/null && echo okay) 223 224ifeq ($(HDR_PROBE),) 225$(warning WARNING: Detected possible issues with include path.) 226$(warning WARNING: Please install kernel headers locally (make headers_install).) 227endif 228 229BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 230BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 231BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 232BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 233 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 234 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ 235 /bin/rm -f ./llvm_btf_verify.o) 236 237BPF_EXTRA_CFLAGS += -fno-stack-protector 238ifneq ($(BTF_LLVM_PROBE),) 239 BPF_EXTRA_CFLAGS += -g 240else 241ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 242 BPF_EXTRA_CFLAGS += -g 243 LLC_FLAGS += -mattr=dwarfris 244 DWARF2BTF = y 245endif 246endif 247endif 248 249# Trick to allow make to be run from this directory 250all: 251 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 252 253clean: 254 $(MAKE) -C ../../ M=$(CURDIR) clean 255 @find $(CURDIR) -type f -name '*~' -delete 256 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool 257 258$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 259# Fix up variables inherited from Kbuild that tools/ build system won't like 260 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 261 LDFLAGS="$(TPROGS_LDFLAGS)" srctree=$(BPF_SAMPLES_PATH)/../../ \ 262 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \ 263 $@ install_headers 264 265BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 266BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool 267DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool 268BPFTOOL ?= $(DEFAULT_BPFTOOL) 269$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) 270 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ 271 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap 272 273$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 274 $(call msg,MKDIR,$@) 275 $(Q)mkdir -p $@ 276 277$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 278 $(call filechk,offsets,__SYSCALL_NRS_H__) 279 280targets += syscall_nrs.s 281clean-files += syscall_nrs.h 282 283FORCE: 284 285 286# Verify LLVM compiler tools are available and bpf target is supported by llc 287.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 288 289verify_cmds: $(CLANG) $(LLC) 290 @for TOOL in $^ ; do \ 291 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 292 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 293 exit 1; \ 294 else true; fi; \ 295 done 296 297verify_target_bpf: verify_cmds 298 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 299 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 300 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 301 exit 2; \ 302 else true; fi 303 304$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 305$(src)/*.c: verify_target_bpf $(LIBBPF) 306 307libbpf_hdrs: $(LIBBPF) 308$(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs 309 310.PHONY: libbpf_hdrs 311 312$(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h 313 314$(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h 315$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 316$(obj)/hbm.o: $(src)/hbm.h 317$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 318 319# Override includes for xdp_sample_user.o because $(srctree)/usr/include in 320# TPROGS_CFLAGS causes conflicts 321XDP_SAMPLE_CFLAGS += -Wall -O2 \ 322 -I$(src)/../../tools/include \ 323 -I$(src)/../../tools/include/uapi \ 324 -I$(LIBBPF_INCLUDE) \ 325 -I$(src)/../../tools/testing/selftests/bpf 326 327$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) $(TPROGS_USER_CFLAGS) 328$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h 329# Override includes for trace_helpers.o because __must_check won't be defined 330# in our include path. 331$(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TPROGS_CFLAGS) -D__must_check= 332 333-include $(BPF_SAMPLES_PATH)/Makefile.target 334 335VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \ 336 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \ 337 $(abspath ./vmlinux) 338VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 339 340$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) 341ifeq ($(VMLINUX_H),) 342ifeq ($(VMLINUX_BTF),) 343 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\ 344 build the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable) 345endif 346 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 347else 348 $(Q)cp "$(VMLINUX_H)" $@ 349endif 350 351clean-files += vmlinux.h 352 353# Get Clang's default includes on this system, as opposed to those seen by 354# '--target=bpf'. This fixes "missing" files on some architectures/distros, 355# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 356# 357# Use '-idirafter': Don't interfere with include mechanics except where the 358# build would have failed anyways. 359define get_sys_includes 360$(shell $(1) -v -E - </dev/null 2>&1 \ 361 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 362$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/') 363endef 364 365CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 366 367$(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o 368 369$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h 370 @echo " CLANG-BPF " $@ 371 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \ 372 -Wno-compare-distinct-pointer-types -I$(srctree)/include \ 373 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ 374 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ 375 -c $(filter %.bpf.c,$^) -o $@ 376 377LINKED_SKELS := xdp_router_ipv4.skel.h 378clean-files += $(LINKED_SKELS) 379 380xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o 381 382LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps))) 383 384BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) 385BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) 386BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) 387 388$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL) 389 @echo " BPF GEN-OBJ " $(@:.skel.h=) 390 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps)) 391 @echo " BPF GEN-SKEL" $(@:.skel.h=) 392 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@ 393 394# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 395# But, there is no easy way to fix it, so just exclude it since it is 396# useless for BPF samples. 397# below we use long chain of commands, clang | opt | llvm-dis | llc, 398# to generate final object file. 'clang' compiles the source into IR 399# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin 400# processing (llvm12) and IR optimizations. 'llvm-dis' converts 401# 'opt' output to IR, and finally 'llc' generates bpf byte code. 402$(obj)/%.o: $(src)/%.c 403 @echo " CLANG-bpf " $@ 404 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \ 405 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \ 406 -I$(LIBBPF_INCLUDE) \ 407 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 408 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 409 -Wno-gnu-variable-sized-type-not-at-end \ 410 -Wno-address-of-packed-member -Wno-tautological-compare \ 411 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 412 -fno-asynchronous-unwind-tables \ 413 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 414 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ 415 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ 416 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 417ifeq ($(DWARF2BTF),y) 418 $(BTF_PAHOLE) -J $@ 419endif 420