1# SPDX-License-Identifier: GPL-2.0 2 3BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(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 := $(tprogs-y) 104always-y += sockex1_kern.o 105always-y += sockex2_kern.o 106always-y += sockex3_kern.o 107always-y += tracex1.bpf.o 108always-y += tracex2.bpf.o 109always-y += tracex3.bpf.o 110always-y += tracex4.bpf.o 111always-y += tracex5.bpf.o 112always-y += tracex6.bpf.o 113always-y += tracex7.bpf.o 114always-y += sock_flags.bpf.o 115always-y += test_probe_write_user.bpf.o 116always-y += trace_output.bpf.o 117always-y += tcbpf1_kern.o 118always-y += tc_l2_redirect_kern.o 119always-y += lathist_kern.o 120always-y += offwaketime.bpf.o 121always-y += spintest.bpf.o 122always-y += map_perf_test.bpf.o 123always-y += test_overhead_tp.bpf.o 124always-y += test_overhead_raw_tp.bpf.o 125always-y += test_overhead_kprobe.bpf.o 126always-y += parse_varlen.o parse_simple.o parse_ldabs.o 127always-y += test_cgrp2_tc.bpf.o 128always-y += test_current_task_under_cgroup.bpf.o 129always-y += trace_event_kern.o 130always-y += sampleip_kern.o 131always-y += lwt_len_hist.bpf.o 132always-y += xdp_tx_iptunnel_kern.o 133always-y += test_map_in_map.bpf.o 134always-y += tcp_synrto_kern.o 135always-y += tcp_rwnd_kern.o 136always-y += tcp_bufs_kern.o 137always-y += tcp_cong_kern.o 138always-y += tcp_iw_kern.o 139always-y += tcp_clamp_kern.o 140always-y += tcp_basertt_kern.o 141always-y += tcp_tos_reflect_kern.o 142always-y += tcp_dumpstats_kern.o 143always-y += xdp2skb_meta_kern.o 144always-y += syscall_tp_kern.o 145always-y += cpustat_kern.o 146always-y += xdp_adjust_tail_kern.o 147always-y += xdp_fwd_kern.o 148always-y += task_fd_query_kern.o 149always-y += ibumad_kern.o 150always-y += hbm_out_kern.o 151always-y += hbm_edt_kern.o 152 153ifeq ($(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 ($(ARCH), x86) 170BPF_EXTRA_CFLAGS += -fcf-protection 171endif 172 173TPROGS_CFLAGS += -Wall -O2 174TPROGS_CFLAGS += -Wmissing-prototypes 175TPROGS_CFLAGS += -Wstrict-prototypes 176 177TPROGS_CFLAGS += -I$(objtree)/usr/include 178TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 179TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) 180TPROGS_CFLAGS += -I$(srctree)/tools/include 181TPROGS_CFLAGS += -I$(srctree)/tools/perf 182TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 183 184ifdef SYSROOT 185TPROGS_CFLAGS += --sysroot=$(SYSROOT) 186TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 187endif 188 189TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 190TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread 191TPROGLDLIBS_tracex4 += -lrt 192TPROGLDLIBS_trace_output += -lrt 193TPROGLDLIBS_map_perf_test += -lrt 194TPROGLDLIBS_test_overhead += -lrt 195 196# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 197# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang 198LLC ?= llc 199CLANG ?= clang 200OPT ?= opt 201LLVM_DIS ?= llvm-dis 202LLVM_OBJCOPY ?= llvm-objcopy 203LLVM_READELF ?= llvm-readelf 204BTF_PAHOLE ?= pahole 205 206# Detect that we're cross compiling and use the cross compiler 207ifdef CROSS_COMPILE 208CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 209endif 210 211# Don't evaluate probes and warnings if we need to run make recursively 212ifneq ($(src),) 213HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 214 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 215 -o /dev/null 2>/dev/null && echo okay) 216 217ifeq ($(HDR_PROBE),) 218$(warning WARNING: Detected possible issues with include path.) 219$(warning WARNING: Please install kernel headers locally (make headers_install).) 220endif 221 222BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 223BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 224BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 225BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 226 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 227 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ 228 /bin/rm -f ./llvm_btf_verify.o) 229 230BPF_EXTRA_CFLAGS += -fno-stack-protector 231ifneq ($(BTF_LLVM_PROBE),) 232 BPF_EXTRA_CFLAGS += -g 233else 234ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 235 BPF_EXTRA_CFLAGS += -g 236 LLC_FLAGS += -mattr=dwarfris 237 DWARF2BTF = y 238endif 239endif 240endif 241 242# Trick to allow make to be run from this directory 243all: 244 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 245 246clean: 247 $(MAKE) -C ../../ M=$(CURDIR) clean 248 @find $(CURDIR) -type f -name '*~' -delete 249 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool 250 251$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 252# Fix up variables inherited from Kbuild that tools/ build system won't like 253 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 254 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \ 255 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \ 256 $@ install_headers 257 258BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 259BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool 260BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool 261$(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 = $(XDP_SAMPLE_CFLAGS) 320$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h 321 322-include $(BPF_SAMPLES_PATH)/Makefile.target 323 324VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \ 325 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \ 326 $(abspath ./vmlinux) 327VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 328 329$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) 330ifeq ($(VMLINUX_H),) 331ifeq ($(VMLINUX_BTF),) 332 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\ 333 build the kernel or set VMLINUX_BTF or VMLINUX_H variable) 334endif 335 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 336else 337 $(Q)cp "$(VMLINUX_H)" $@ 338endif 339 340clean-files += vmlinux.h 341 342# Get Clang's default includes on this system, as opposed to those seen by 343# '--target=bpf'. This fixes "missing" files on some architectures/distros, 344# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 345# 346# Use '-idirafter': Don't interfere with include mechanics except where the 347# build would have failed anyways. 348define get_sys_includes 349$(shell $(1) -v -E - </dev/null 2>&1 \ 350 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 351$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/') 352endef 353 354CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 355 356$(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o 357 358$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h 359 @echo " CLANG-BPF " $@ 360 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \ 361 -Wno-compare-distinct-pointer-types -I$(srctree)/include \ 362 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ 363 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ 364 -c $(filter %.bpf.c,$^) -o $@ 365 366LINKED_SKELS := xdp_router_ipv4.skel.h 367clean-files += $(LINKED_SKELS) 368 369xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o 370 371LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps))) 372 373BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) 374BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) 375BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) 376 377$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL) 378 @echo " BPF GEN-OBJ " $(@:.skel.h=) 379 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps)) 380 @echo " BPF GEN-SKEL" $(@:.skel.h=) 381 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@ 382 383# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 384# But, there is no easy way to fix it, so just exclude it since it is 385# useless for BPF samples. 386# below we use long chain of commands, clang | opt | llvm-dis | llc, 387# to generate final object file. 'clang' compiles the source into IR 388# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin 389# processing (llvm12) and IR optimizations. 'llvm-dis' converts 390# 'opt' output to IR, and finally 'llc' generates bpf byte code. 391$(obj)/%.o: $(src)/%.c 392 @echo " CLANG-bpf " $@ 393 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \ 394 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \ 395 -I$(LIBBPF_INCLUDE) \ 396 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 397 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 398 -Wno-gnu-variable-sized-type-not-at-end \ 399 -Wno-address-of-packed-member -Wno-tautological-compare \ 400 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 401 -fno-asynchronous-unwind-tables \ 402 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 403 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ 404 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ 405 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 406ifeq ($(DWARF2BTF),y) 407 $(BTF_PAHOLE) -J $@ 408endif 409