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 += xdp1 34tprogs-y += xdp2 35tprogs-y += xdp_router_ipv4 36tprogs-y += test_current_task_under_cgroup 37tprogs-y += trace_event 38tprogs-y += sampleip 39tprogs-y += tc_l2_redirect 40tprogs-y += lwt_len_hist 41tprogs-y += xdp_tx_iptunnel 42tprogs-y += test_map_in_map 43tprogs-y += per_socket_stats_example 44tprogs-y += syscall_tp 45tprogs-y += cpustat 46tprogs-y += xdp_adjust_tail 47tprogs-y += xdp_fwd 48tprogs-y += task_fd_query 49tprogs-y += xdp_sample_pkts 50tprogs-y += ibumad 51tprogs-y += hbm 52 53# Libbpf dependencies 54LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf 55LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf 56LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) 57LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include 58LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a 59 60CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 61TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o 62XDP_SAMPLE := xdp_sample_user.o 63 64fds_example-objs := fds_example.o 65sockex1-objs := sockex1_user.o 66sockex2-objs := sockex2_user.o 67sockex3-objs := sockex3_user.o 68tracex1-objs := tracex1_user.o $(TRACE_HELPERS) 69tracex2-objs := tracex2_user.o 70tracex3-objs := tracex3_user.o 71tracex4-objs := tracex4_user.o 72tracex5-objs := tracex5_user.o $(TRACE_HELPERS) 73tracex6-objs := tracex6_user.o 74tracex7-objs := tracex7_user.o 75test_probe_write_user-objs := test_probe_write_user_user.o 76trace_output-objs := trace_output_user.o 77lathist-objs := lathist_user.o 78offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS) 79spintest-objs := spintest_user.o $(TRACE_HELPERS) 80map_perf_test-objs := map_perf_test_user.o 81test_overhead-objs := test_overhead_user.o 82test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o 83test_cgrp2_attach-objs := test_cgrp2_attach.o 84test_cgrp2_sock-objs := test_cgrp2_sock.o 85test_cgrp2_sock2-objs := test_cgrp2_sock2.o 86xdp1-objs := xdp1_user.o 87# reuse xdp1 source intentionally 88xdp2-objs := xdp1_user.o 89test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ 90 test_current_task_under_cgroup_user.o 91trace_event-objs := trace_event_user.o $(TRACE_HELPERS) 92sampleip-objs := sampleip_user.o $(TRACE_HELPERS) 93tc_l2_redirect-objs := tc_l2_redirect_user.o 94lwt_len_hist-objs := lwt_len_hist_user.o 95xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 96test_map_in_map-objs := test_map_in_map_user.o 97per_socket_stats_example-objs := cookie_uid_helper_example.o 98syscall_tp-objs := syscall_tp_user.o 99cpustat-objs := cpustat_user.o 100xdp_adjust_tail-objs := xdp_adjust_tail_user.o 101xdp_fwd-objs := xdp_fwd_user.o 102task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) 103xdp_sample_pkts-objs := xdp_sample_pkts_user.o 104ibumad-objs := ibumad_user.o 105hbm-objs := hbm.o $(CGROUP_HELPERS) 106 107xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE) 108 109# Tell kbuild to always build the programs 110always-y := $(tprogs-y) 111always-y += sockex1_kern.o 112always-y += sockex2_kern.o 113always-y += sockex3_kern.o 114always-y += tracex1.bpf.o 115always-y += tracex2.bpf.o 116always-y += tracex3.bpf.o 117always-y += tracex4.bpf.o 118always-y += tracex5.bpf.o 119always-y += tracex6.bpf.o 120always-y += tracex7.bpf.o 121always-y += sock_flags.bpf.o 122always-y += test_probe_write_user.bpf.o 123always-y += trace_output.bpf.o 124always-y += tcbpf1_kern.o 125always-y += tc_l2_redirect_kern.o 126always-y += lathist_kern.o 127always-y += offwaketime.bpf.o 128always-y += spintest.bpf.o 129always-y += map_perf_test.bpf.o 130always-y += test_overhead_tp.bpf.o 131always-y += test_overhead_raw_tp.bpf.o 132always-y += test_overhead_kprobe.bpf.o 133always-y += parse_varlen.o parse_simple.o parse_ldabs.o 134always-y += test_cgrp2_tc.bpf.o 135always-y += xdp1_kern.o 136always-y += xdp2_kern.o 137always-y += test_current_task_under_cgroup.bpf.o 138always-y += trace_event_kern.o 139always-y += sampleip_kern.o 140always-y += lwt_len_hist.bpf.o 141always-y += xdp_tx_iptunnel_kern.o 142always-y += test_map_in_map.bpf.o 143always-y += tcp_synrto_kern.o 144always-y += tcp_rwnd_kern.o 145always-y += tcp_bufs_kern.o 146always-y += tcp_cong_kern.o 147always-y += tcp_iw_kern.o 148always-y += tcp_clamp_kern.o 149always-y += tcp_basertt_kern.o 150always-y += tcp_tos_reflect_kern.o 151always-y += tcp_dumpstats_kern.o 152always-y += xdp2skb_meta_kern.o 153always-y += syscall_tp_kern.o 154always-y += cpustat_kern.o 155always-y += xdp_adjust_tail_kern.o 156always-y += xdp_fwd_kern.o 157always-y += task_fd_query_kern.o 158always-y += xdp_sample_pkts_kern.o 159always-y += ibumad_kern.o 160always-y += hbm_out_kern.o 161always-y += hbm_edt_kern.o 162 163ifeq ($(ARCH), arm) 164# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux 165# headers when arm instruction set identification is requested. 166ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS)) 167BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 168TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 169endif 170 171ifeq ($(ARCH), mips) 172TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ 173ifdef CONFIG_MACH_LOONGSON64 174BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64 175BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic 176endif 177endif 178 179TPROGS_CFLAGS += -Wall -O2 180TPROGS_CFLAGS += -Wmissing-prototypes 181TPROGS_CFLAGS += -Wstrict-prototypes 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$(srctree)/tools/perf 188TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 189 190ifdef SYSROOT 191TPROGS_CFLAGS += --sysroot=$(SYSROOT) 192TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 193endif 194 195TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 196TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread 197TPROGLDLIBS_tracex4 += -lrt 198TPROGLDLIBS_trace_output += -lrt 199TPROGLDLIBS_map_perf_test += -lrt 200TPROGLDLIBS_test_overhead += -lrt 201 202# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 203# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang 204LLC ?= llc 205CLANG ?= clang 206OPT ?= opt 207LLVM_DIS ?= llvm-dis 208LLVM_OBJCOPY ?= llvm-objcopy 209LLVM_READELF ?= llvm-readelf 210BTF_PAHOLE ?= pahole 211 212# Detect that we're cross compiling and use the cross compiler 213ifdef CROSS_COMPILE 214CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 215endif 216 217# Don't evaluate probes and warnings if we need to run make recursively 218ifneq ($(src),) 219HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 220 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 221 -o /dev/null 2>/dev/null && echo okay) 222 223ifeq ($(HDR_PROBE),) 224$(warning WARNING: Detected possible issues with include path.) 225$(warning WARNING: Please install kernel headers locally (make headers_install).) 226endif 227 228BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 229BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 230BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 231BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 232 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 233 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ 234 /bin/rm -f ./llvm_btf_verify.o) 235 236BPF_EXTRA_CFLAGS += -fno-stack-protector 237ifneq ($(BTF_LLVM_PROBE),) 238 BPF_EXTRA_CFLAGS += -g 239else 240ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 241 BPF_EXTRA_CFLAGS += -g 242 LLC_FLAGS += -mattr=dwarfris 243 DWARF2BTF = y 244endif 245endif 246endif 247 248# Trick to allow make to be run from this directory 249all: 250 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 251 252clean: 253 $(MAKE) -C ../../ M=$(CURDIR) clean 254 @find $(CURDIR) -type f -name '*~' -delete 255 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool 256 257$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 258# Fix up variables inherited from Kbuild that tools/ build system won't like 259 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 260 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \ 261 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \ 262 $@ install_headers 263 264BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 265BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool 266BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool 267$(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) 268 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ 269 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap 270 271$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 272 $(call msg,MKDIR,$@) 273 $(Q)mkdir -p $@ 274 275$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 276 $(call filechk,offsets,__SYSCALL_NRS_H__) 277 278targets += syscall_nrs.s 279clean-files += syscall_nrs.h 280 281FORCE: 282 283 284# Verify LLVM compiler tools are available and bpf target is supported by llc 285.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 286 287verify_cmds: $(CLANG) $(LLC) 288 @for TOOL in $^ ; do \ 289 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 290 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 291 exit 1; \ 292 else true; fi; \ 293 done 294 295verify_target_bpf: verify_cmds 296 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 297 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 298 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 299 exit 2; \ 300 else true; fi 301 302$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 303$(src)/*.c: verify_target_bpf $(LIBBPF) 304 305libbpf_hdrs: $(LIBBPF) 306$(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs 307 308.PHONY: libbpf_hdrs 309 310$(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h 311 312$(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h 313$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 314$(obj)/hbm.o: $(src)/hbm.h 315$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 316 317# Override includes for xdp_sample_user.o because $(srctree)/usr/include in 318# TPROGS_CFLAGS causes conflicts 319XDP_SAMPLE_CFLAGS += -Wall -O2 \ 320 -I$(src)/../../tools/include \ 321 -I$(src)/../../tools/include/uapi \ 322 -I$(LIBBPF_INCLUDE) \ 323 -I$(src)/../../tools/testing/selftests/bpf 324 325$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) 326$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h 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 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 $(CLANG_ARCH_ARGS) \ 407 -fno-asynchronous-unwind-tables -fcf-protection \ 408 -I$(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