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 7hostprogs-y := test_lru_dist 8hostprogs-y += sock_example 9hostprogs-y += fds_example 10hostprogs-y += sockex1 11hostprogs-y += sockex2 12hostprogs-y += sockex3 13hostprogs-y += tracex1 14hostprogs-y += tracex2 15hostprogs-y += tracex3 16hostprogs-y += tracex4 17hostprogs-y += tracex5 18hostprogs-y += tracex6 19hostprogs-y += tracex7 20hostprogs-y += test_probe_write_user 21hostprogs-y += trace_output 22hostprogs-y += lathist 23hostprogs-y += offwaketime 24hostprogs-y += spintest 25hostprogs-y += map_perf_test 26hostprogs-y += test_overhead 27hostprogs-y += test_cgrp2_array_pin 28hostprogs-y += test_cgrp2_attach 29hostprogs-y += test_cgrp2_sock 30hostprogs-y += test_cgrp2_sock2 31hostprogs-y += xdp1 32hostprogs-y += xdp2 33hostprogs-y += xdp_router_ipv4 34hostprogs-y += test_current_task_under_cgroup 35hostprogs-y += trace_event 36hostprogs-y += sampleip 37hostprogs-y += tc_l2_redirect 38hostprogs-y += lwt_len_hist 39hostprogs-y += xdp_tx_iptunnel 40hostprogs-y += test_map_in_map 41hostprogs-y += per_socket_stats_example 42hostprogs-y += xdp_redirect 43hostprogs-y += xdp_redirect_map 44hostprogs-y += xdp_redirect_cpu 45hostprogs-y += xdp_monitor 46hostprogs-y += xdp_rxq_info 47hostprogs-y += syscall_tp 48hostprogs-y += cpustat 49hostprogs-y += xdp_adjust_tail 50hostprogs-y += xdpsock 51hostprogs-y += xdp_fwd 52hostprogs-y += task_fd_query 53hostprogs-y += xdp_sample_pkts 54hostprogs-y += ibumad 55hostprogs-y += hbm 56 57# Libbpf dependencies 58LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a 59 60CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 61TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o 62 63fds_example-objs := fds_example.o 64sockex1-objs := sockex1_user.o 65sockex2-objs := sockex2_user.o 66sockex3-objs := bpf_load.o sockex3_user.o 67tracex1-objs := bpf_load.o tracex1_user.o 68tracex2-objs := bpf_load.o tracex2_user.o 69tracex3-objs := bpf_load.o tracex3_user.o 70tracex4-objs := bpf_load.o tracex4_user.o 71tracex5-objs := bpf_load.o tracex5_user.o 72tracex6-objs := bpf_load.o tracex6_user.o 73tracex7-objs := bpf_load.o tracex7_user.o 74test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o 75trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS) 76lathist-objs := bpf_load.o lathist_user.o 77offwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS) 78spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS) 79map_perf_test-objs := bpf_load.o map_perf_test_user.o 80test_overhead-objs := bpf_load.o test_overhead_user.o 81test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o 82test_cgrp2_attach-objs := test_cgrp2_attach.o 83test_cgrp2_sock-objs := test_cgrp2_sock.o 84test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o 85xdp1-objs := xdp1_user.o 86# reuse xdp1 source intentionally 87xdp2-objs := xdp1_user.o 88xdp_router_ipv4-objs := xdp_router_ipv4_user.o 89test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \ 90 test_current_task_under_cgroup_user.o 91trace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS) 92sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS) 93tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o 94lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o 95xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 96test_map_in_map-objs := bpf_load.o test_map_in_map_user.o 97per_socket_stats_example-objs := cookie_uid_helper_example.o 98xdp_redirect-objs := xdp_redirect_user.o 99xdp_redirect_map-objs := xdp_redirect_map_user.o 100xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o 101xdp_monitor-objs := bpf_load.o xdp_monitor_user.o 102xdp_rxq_info-objs := xdp_rxq_info_user.o 103syscall_tp-objs := bpf_load.o syscall_tp_user.o 104cpustat-objs := bpf_load.o cpustat_user.o 105xdp_adjust_tail-objs := xdp_adjust_tail_user.o 106xdpsock-objs := xdpsock_user.o 107xdp_fwd-objs := xdp_fwd_user.o 108task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS) 109xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS) 110ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS) 111hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS) 112 113# Tell kbuild to always build the programs 114always := $(hostprogs-y) 115always += sockex1_kern.o 116always += sockex2_kern.o 117always += sockex3_kern.o 118always += tracex1_kern.o 119always += tracex2_kern.o 120always += tracex3_kern.o 121always += tracex4_kern.o 122always += tracex5_kern.o 123always += tracex6_kern.o 124always += tracex7_kern.o 125always += sock_flags_kern.o 126always += test_probe_write_user_kern.o 127always += trace_output_kern.o 128always += tcbpf1_kern.o 129always += tc_l2_redirect_kern.o 130always += lathist_kern.o 131always += offwaketime_kern.o 132always += spintest_kern.o 133always += map_perf_test_kern.o 134always += test_overhead_tp_kern.o 135always += test_overhead_raw_tp_kern.o 136always += test_overhead_kprobe_kern.o 137always += parse_varlen.o parse_simple.o parse_ldabs.o 138always += test_cgrp2_tc_kern.o 139always += xdp1_kern.o 140always += xdp2_kern.o 141always += xdp_router_ipv4_kern.o 142always += test_current_task_under_cgroup_kern.o 143always += trace_event_kern.o 144always += sampleip_kern.o 145always += lwt_len_hist_kern.o 146always += xdp_tx_iptunnel_kern.o 147always += test_map_in_map_kern.o 148always += cookie_uid_helper_example.o 149always += tcp_synrto_kern.o 150always += tcp_rwnd_kern.o 151always += tcp_bufs_kern.o 152always += tcp_cong_kern.o 153always += tcp_iw_kern.o 154always += tcp_clamp_kern.o 155always += tcp_basertt_kern.o 156always += tcp_tos_reflect_kern.o 157always += tcp_dumpstats_kern.o 158always += xdp_redirect_kern.o 159always += xdp_redirect_map_kern.o 160always += xdp_redirect_cpu_kern.o 161always += xdp_monitor_kern.o 162always += xdp_rxq_info_kern.o 163always += xdp2skb_meta_kern.o 164always += syscall_tp_kern.o 165always += cpustat_kern.o 166always += xdp_adjust_tail_kern.o 167always += xdp_fwd_kern.o 168always += task_fd_query_kern.o 169always += xdp_sample_pkts_kern.o 170always += ibumad_kern.o 171always += hbm_out_kern.o 172always += hbm_edt_kern.o 173 174KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include 175KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/bpf/ 176KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 177KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include 178KBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf 179 180HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable 181 182KBUILD_HOSTLDLIBS += $(LIBBPF) -lelf 183HOSTLDLIBS_tracex4 += -lrt 184HOSTLDLIBS_trace_output += -lrt 185HOSTLDLIBS_map_perf_test += -lrt 186HOSTLDLIBS_test_overhead += -lrt 187HOSTLDLIBS_xdpsock += -pthread 188 189# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 190# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang 191LLC ?= llc 192CLANG ?= clang 193LLVM_OBJCOPY ?= llvm-objcopy 194BTF_PAHOLE ?= pahole 195 196# Detect that we're cross compiling and use the cross compiler 197ifdef CROSS_COMPILE 198HOSTCC = $(CROSS_COMPILE)gcc 199CLANG_ARCH_ARGS = -target $(ARCH) 200endif 201 202# Don't evaluate probes and warnings if we need to run make recursively 203ifneq ($(src),) 204HDR_PROBE := $(shell echo "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 205 $(HOSTCC) $(KBUILD_HOSTCFLAGS) -x c - -o /dev/null 2>/dev/null && \ 206 echo okay) 207 208ifeq ($(HDR_PROBE),) 209$(warning WARNING: Detected possible issues with include path.) 210$(warning WARNING: Please install kernel headers locally (make headers_install).) 211endif 212 213BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 214BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 215BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 216BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 217 $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 218 readelf -S ./llvm_btf_verify.o | grep BTF; \ 219 /bin/rm -f ./llvm_btf_verify.o) 220 221ifneq ($(BTF_LLVM_PROBE),) 222 EXTRA_CFLAGS += -g 223else 224ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 225 EXTRA_CFLAGS += -g 226 LLC_FLAGS += -mattr=dwarfris 227 DWARF2BTF = y 228endif 229endif 230endif 231 232# Trick to allow make to be run from this directory 233all: 234 $(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR) 235 236clean: 237 $(MAKE) -C ../../ M=$(CURDIR) clean 238 @rm -f *~ 239 240$(LIBBPF): FORCE 241# Fix up variables inherited from Kbuild that tools/ build system won't like 242 $(MAKE) -C $(dir $@) RM='rm -rf' LDFLAGS= srctree=$(BPF_SAMPLES_PATH)/../../ O= 243 244$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 245 $(call filechk,offsets,__SYSCALL_NRS_H__) 246 247targets += syscall_nrs.s 248clean-files += syscall_nrs.h 249 250FORCE: 251 252 253# Verify LLVM compiler tools are available and bpf target is supported by llc 254.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 255 256verify_cmds: $(CLANG) $(LLC) 257 @for TOOL in $^ ; do \ 258 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 259 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 260 exit 1; \ 261 else true; fi; \ 262 done 263 264verify_target_bpf: verify_cmds 265 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 266 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 267 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 268 exit 2; \ 269 else true; fi 270 271$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 272$(src)/*.c: verify_target_bpf $(LIBBPF) 273 274$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h 275$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 276$(obj)/hbm.o: $(src)/hbm.h 277$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 278 279# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 280# But, there is no easy way to fix it, so just exclude it since it is 281# useless for BPF samples. 282$(obj)/%.o: $(src)/%.c 283 @echo " CLANG-bpf " $@ 284 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \ 285 -I$(srctree)/tools/testing/selftests/bpf/ \ 286 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 287 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 288 -Wno-gnu-variable-sized-type-not-at-end \ 289 -Wno-address-of-packed-member -Wno-tautological-compare \ 290 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 291 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 292 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 293ifeq ($(DWARF2BTF),y) 294 $(BTF_PAHOLE) -J $@ 295endif 296