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