1# SPDX-License-Identifier: GPL-2.0 2 3BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src)) 4TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools 5 6# List of programs to build 7tprogs-y := test_lru_dist 8tprogs-y += sock_example 9tprogs-y += fds_example 10tprogs-y += sockex1 11tprogs-y += sockex2 12tprogs-y += sockex3 13tprogs-y += tracex1 14tprogs-y += tracex2 15tprogs-y += tracex3 16tprogs-y += tracex4 17tprogs-y += tracex5 18tprogs-y += tracex6 19tprogs-y += tracex7 20tprogs-y += test_probe_write_user 21tprogs-y += trace_output 22tprogs-y += lathist 23tprogs-y += offwaketime 24tprogs-y += spintest 25tprogs-y += map_perf_test 26tprogs-y += test_overhead 27tprogs-y += test_cgrp2_array_pin 28tprogs-y += test_cgrp2_attach 29tprogs-y += test_cgrp2_sock 30tprogs-y += test_cgrp2_sock2 31tprogs-y += xdp1 32tprogs-y += xdp2 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 += xdp_redirect 43tprogs-y += xdp_redirect_map 44tprogs-y += xdp_redirect_cpu 45tprogs-y += xdp_monitor 46tprogs-y += xdp_rxq_info 47tprogs-y += syscall_tp 48tprogs-y += cpustat 49tprogs-y += xdp_adjust_tail 50tprogs-y += xdpsock 51tprogs-y += xsk_fwd 52tprogs-y += xdp_fwd 53tprogs-y += task_fd_query 54tprogs-y += xdp_sample_pkts 55tprogs-y += ibumad 56tprogs-y += hbm 57 58# Libbpf dependencies 59LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a 60 61CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 62TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.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 $(TRACE_HELPERS) 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 := bpf_load.o 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 := bpf_load.o test_cgrp2_sock2.o 86xdp1-objs := xdp1_user.o 87# reuse xdp1 source intentionally 88xdp2-objs := xdp1_user.o 89xdp_router_ipv4-objs := xdp_router_ipv4_user.o 90test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ 91 test_current_task_under_cgroup_user.o 92trace_event-objs := trace_event_user.o $(TRACE_HELPERS) 93sampleip-objs := sampleip_user.o $(TRACE_HELPERS) 94tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o 95lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o 96xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 97test_map_in_map-objs := test_map_in_map_user.o 98per_socket_stats_example-objs := cookie_uid_helper_example.o 99xdp_redirect-objs := xdp_redirect_user.o 100xdp_redirect_map-objs := xdp_redirect_map_user.o 101xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o 102xdp_monitor-objs := xdp_monitor_user.o 103xdp_rxq_info-objs := xdp_rxq_info_user.o 104syscall_tp-objs := syscall_tp_user.o 105cpustat-objs := cpustat_user.o 106xdp_adjust_tail-objs := xdp_adjust_tail_user.o 107xdpsock-objs := xdpsock_user.o 108xsk_fwd-objs := xsk_fwd.o 109xdp_fwd-objs := xdp_fwd_user.o 110task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS) 111xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS) 112ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS) 113hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS) 114 115# Tell kbuild to always build the programs 116always-y := $(tprogs-y) 117always-y += sockex1_kern.o 118always-y += sockex2_kern.o 119always-y += sockex3_kern.o 120always-y += tracex1_kern.o 121always-y += tracex2_kern.o 122always-y += tracex3_kern.o 123always-y += tracex4_kern.o 124always-y += tracex5_kern.o 125always-y += tracex6_kern.o 126always-y += tracex7_kern.o 127always-y += sock_flags_kern.o 128always-y += test_probe_write_user_kern.o 129always-y += trace_output_kern.o 130always-y += tcbpf1_kern.o 131always-y += tc_l2_redirect_kern.o 132always-y += lathist_kern.o 133always-y += offwaketime_kern.o 134always-y += spintest_kern.o 135always-y += map_perf_test_kern.o 136always-y += test_overhead_tp_kern.o 137always-y += test_overhead_raw_tp_kern.o 138always-y += test_overhead_kprobe_kern.o 139always-y += parse_varlen.o parse_simple.o parse_ldabs.o 140always-y += test_cgrp2_tc_kern.o 141always-y += xdp1_kern.o 142always-y += xdp2_kern.o 143always-y += xdp_router_ipv4_kern.o 144always-y += test_current_task_under_cgroup_kern.o 145always-y += trace_event_kern.o 146always-y += sampleip_kern.o 147always-y += lwt_len_hist_kern.o 148always-y += xdp_tx_iptunnel_kern.o 149always-y += test_map_in_map_kern.o 150always-y += tcp_synrto_kern.o 151always-y += tcp_rwnd_kern.o 152always-y += tcp_bufs_kern.o 153always-y += tcp_cong_kern.o 154always-y += tcp_iw_kern.o 155always-y += tcp_clamp_kern.o 156always-y += tcp_basertt_kern.o 157always-y += tcp_tos_reflect_kern.o 158always-y += tcp_dumpstats_kern.o 159always-y += xdp_redirect_kern.o 160always-y += xdp_redirect_map_kern.o 161always-y += xdp_redirect_cpu_kern.o 162always-y += xdp_monitor_kern.o 163always-y += xdp_rxq_info_kern.o 164always-y += xdp2skb_meta_kern.o 165always-y += syscall_tp_kern.o 166always-y += cpustat_kern.o 167always-y += xdp_adjust_tail_kern.o 168always-y += xdp_fwd_kern.o 169always-y += task_fd_query_kern.o 170always-y += xdp_sample_pkts_kern.o 171always-y += ibumad_kern.o 172always-y += hbm_out_kern.o 173always-y += hbm_edt_kern.o 174always-y += xdpsock_kern.o 175 176ifeq ($(ARCH), arm) 177# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux 178# headers when arm instruction set identification is requested. 179ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS)) 180BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 181TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 182endif 183 184TPROGS_CFLAGS += -Wall -O2 185TPROGS_CFLAGS += -Wmissing-prototypes 186TPROGS_CFLAGS += -Wstrict-prototypes 187 188TPROGS_CFLAGS += -I$(objtree)/usr/include 189TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 190TPROGS_CFLAGS += -I$(srctree)/tools/lib/ 191TPROGS_CFLAGS += -I$(srctree)/tools/include 192TPROGS_CFLAGS += -I$(srctree)/tools/perf 193TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 194 195ifdef SYSROOT 196TPROGS_CFLAGS += --sysroot=$(SYSROOT) 197TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 198endif 199 200TPROGCFLAGS_bpf_load.o += -Wno-unused-variable 201 202TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 203TPROGLDLIBS_tracex4 += -lrt 204TPROGLDLIBS_trace_output += -lrt 205TPROGLDLIBS_map_perf_test += -lrt 206TPROGLDLIBS_test_overhead += -lrt 207TPROGLDLIBS_xdpsock += -pthread 208TPROGLDLIBS_xsk_fwd += -pthread 209 210# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 211# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang 212LLC ?= llc 213CLANG ?= clang 214OPT ?= opt 215LLVM_DIS ?= llvm-dis 216LLVM_OBJCOPY ?= llvm-objcopy 217BTF_PAHOLE ?= pahole 218 219# Detect that we're cross compiling and use the cross compiler 220ifdef CROSS_COMPILE 221CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 222endif 223 224# Don't evaluate probes and warnings if we need to run make recursively 225ifneq ($(src),) 226HDR_PROBE := $(shell printf "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 227 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 228 -o /dev/null 2>/dev/null && echo okay) 229 230ifeq ($(HDR_PROBE),) 231$(warning WARNING: Detected possible issues with include path.) 232$(warning WARNING: Please install kernel headers locally (make headers_install).) 233endif 234 235BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 236BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 237BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 238BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 239 $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 240 readelf -S ./llvm_btf_verify.o | grep BTF; \ 241 /bin/rm -f ./llvm_btf_verify.o) 242 243BPF_EXTRA_CFLAGS += -fno-stack-protector 244ifneq ($(BTF_LLVM_PROBE),) 245 BPF_EXTRA_CFLAGS += -g 246else 247ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 248 BPF_EXTRA_CFLAGS += -g 249 LLC_FLAGS += -mattr=dwarfris 250 DWARF2BTF = y 251endif 252endif 253endif 254 255# Trick to allow make to be run from this directory 256all: 257 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 258 259clean: 260 $(MAKE) -C ../../ M=$(CURDIR) clean 261 @find $(CURDIR) -type f -name '*~' -delete 262 263$(LIBBPF): FORCE 264# Fix up variables inherited from Kbuild that tools/ build system won't like 265 $(MAKE) -C $(dir $@) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 266 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ O= 267 268$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 269 $(call filechk,offsets,__SYSCALL_NRS_H__) 270 271targets += syscall_nrs.s 272clean-files += syscall_nrs.h 273 274FORCE: 275 276 277# Verify LLVM compiler tools are available and bpf target is supported by llc 278.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 279 280verify_cmds: $(CLANG) $(LLC) 281 @for TOOL in $^ ; do \ 282 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 283 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 284 exit 1; \ 285 else true; fi; \ 286 done 287 288verify_target_bpf: verify_cmds 289 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 290 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 291 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 292 exit 2; \ 293 else true; fi 294 295$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 296$(src)/*.c: verify_target_bpf $(LIBBPF) 297 298$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h 299$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 300$(obj)/hbm.o: $(src)/hbm.h 301$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 302 303-include $(BPF_SAMPLES_PATH)/Makefile.target 304 305# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 306# But, there is no easy way to fix it, so just exclude it since it is 307# useless for BPF samples. 308# below we use long chain of commands, clang | opt | llvm-dis | llc, 309# to generate final object file. 'clang' compiles the source into IR 310# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin 311# processing (llvm12) and IR optimizations. 'llvm-dis' converts 312# 'opt' output to IR, and finally 'llc' generates bpf byte code. 313$(obj)/%.o: $(src)/%.c 314 @echo " CLANG-bpf " $@ 315 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \ 316 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \ 317 -I$(srctree)/tools/lib/ \ 318 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 319 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 320 -Wno-gnu-variable-sized-type-not-at-end \ 321 -Wno-address-of-packed-member -Wno-tautological-compare \ 322 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 323 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 324 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ 325 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ 326 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 327ifeq ($(DWARF2BTF),y) 328 $(BTF_PAHOLE) -J $@ 329endif 330