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 += xdp_rxq_info 45tprogs-y += syscall_tp 46tprogs-y += cpustat 47tprogs-y += xdp_adjust_tail 48tprogs-y += xdpsock 49tprogs-y += xdpsock_ctrl_proc 50tprogs-y += xsk_fwd 51tprogs-y += xdp_fwd 52tprogs-y += task_fd_query 53tprogs-y += xdp_sample_pkts 54tprogs-y += ibumad 55tprogs-y += hbm 56 57tprogs-y += xdp_redirect_cpu 58tprogs-y += xdp_redirect_map_multi 59tprogs-y += xdp_redirect_map 60tprogs-y += xdp_redirect 61tprogs-y += xdp_monitor 62 63# Libbpf dependencies 64LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf 65LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf 66LIBBPF_DESTDIR = $(LIBBPF_OUTPUT) 67LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include 68LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a 69 70CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o 71TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o 72XDP_SAMPLE := xdp_sample_user.o 73 74fds_example-objs := fds_example.o 75sockex1-objs := sockex1_user.o 76sockex2-objs := sockex2_user.o 77sockex3-objs := sockex3_user.o 78tracex1-objs := tracex1_user.o $(TRACE_HELPERS) 79tracex2-objs := tracex2_user.o 80tracex3-objs := tracex3_user.o 81tracex4-objs := tracex4_user.o 82tracex5-objs := tracex5_user.o $(TRACE_HELPERS) 83tracex6-objs := tracex6_user.o 84tracex7-objs := tracex7_user.o 85test_probe_write_user-objs := test_probe_write_user_user.o 86trace_output-objs := trace_output_user.o 87lathist-objs := lathist_user.o 88offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS) 89spintest-objs := spintest_user.o $(TRACE_HELPERS) 90map_perf_test-objs := map_perf_test_user.o 91test_overhead-objs := test_overhead_user.o 92test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o 93test_cgrp2_attach-objs := test_cgrp2_attach.o 94test_cgrp2_sock-objs := test_cgrp2_sock.o 95test_cgrp2_sock2-objs := test_cgrp2_sock2.o 96xdp1-objs := xdp1_user.o 97# reuse xdp1 source intentionally 98xdp2-objs := xdp1_user.o 99xdp_router_ipv4-objs := xdp_router_ipv4_user.o 100test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ 101 test_current_task_under_cgroup_user.o 102trace_event-objs := trace_event_user.o $(TRACE_HELPERS) 103sampleip-objs := sampleip_user.o $(TRACE_HELPERS) 104tc_l2_redirect-objs := tc_l2_redirect_user.o 105lwt_len_hist-objs := lwt_len_hist_user.o 106xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o 107test_map_in_map-objs := test_map_in_map_user.o 108per_socket_stats_example-objs := cookie_uid_helper_example.o 109xdp_rxq_info-objs := xdp_rxq_info_user.o 110syscall_tp-objs := syscall_tp_user.o 111cpustat-objs := cpustat_user.o 112xdp_adjust_tail-objs := xdp_adjust_tail_user.o 113xdpsock-objs := xdpsock_user.o 114xdpsock_ctrl_proc-objs := xdpsock_ctrl_proc.o 115xsk_fwd-objs := xsk_fwd.o 116xdp_fwd-objs := xdp_fwd_user.o 117task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) 118xdp_sample_pkts-objs := xdp_sample_pkts_user.o 119ibumad-objs := ibumad_user.o 120hbm-objs := hbm.o $(CGROUP_HELPERS) 121 122xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o $(XDP_SAMPLE) 123xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o $(XDP_SAMPLE) 124xdp_redirect_map-objs := xdp_redirect_map_user.o $(XDP_SAMPLE) 125xdp_redirect-objs := xdp_redirect_user.o $(XDP_SAMPLE) 126xdp_monitor-objs := xdp_monitor_user.o $(XDP_SAMPLE) 127 128# Tell kbuild to always build the programs 129always-y := $(tprogs-y) 130always-y += sockex1_kern.o 131always-y += sockex2_kern.o 132always-y += sockex3_kern.o 133always-y += tracex1_kern.o 134always-y += tracex2_kern.o 135always-y += tracex3_kern.o 136always-y += tracex4_kern.o 137always-y += tracex5_kern.o 138always-y += tracex6_kern.o 139always-y += tracex7_kern.o 140always-y += sock_flags_kern.o 141always-y += test_probe_write_user_kern.o 142always-y += trace_output_kern.o 143always-y += tcbpf1_kern.o 144always-y += tc_l2_redirect_kern.o 145always-y += lathist_kern.o 146always-y += offwaketime_kern.o 147always-y += spintest_kern.o 148always-y += map_perf_test_kern.o 149always-y += test_overhead_tp_kern.o 150always-y += test_overhead_raw_tp_kern.o 151always-y += test_overhead_kprobe_kern.o 152always-y += parse_varlen.o parse_simple.o parse_ldabs.o 153always-y += test_cgrp2_tc_kern.o 154always-y += xdp1_kern.o 155always-y += xdp2_kern.o 156always-y += xdp_router_ipv4_kern.o 157always-y += test_current_task_under_cgroup_kern.o 158always-y += trace_event_kern.o 159always-y += sampleip_kern.o 160always-y += lwt_len_hist_kern.o 161always-y += xdp_tx_iptunnel_kern.o 162always-y += test_map_in_map_kern.o 163always-y += tcp_synrto_kern.o 164always-y += tcp_rwnd_kern.o 165always-y += tcp_bufs_kern.o 166always-y += tcp_cong_kern.o 167always-y += tcp_iw_kern.o 168always-y += tcp_clamp_kern.o 169always-y += tcp_basertt_kern.o 170always-y += tcp_tos_reflect_kern.o 171always-y += tcp_dumpstats_kern.o 172always-y += xdp_rxq_info_kern.o 173always-y += xdp2skb_meta_kern.o 174always-y += syscall_tp_kern.o 175always-y += cpustat_kern.o 176always-y += xdp_adjust_tail_kern.o 177always-y += xdp_fwd_kern.o 178always-y += task_fd_query_kern.o 179always-y += xdp_sample_pkts_kern.o 180always-y += ibumad_kern.o 181always-y += hbm_out_kern.o 182always-y += hbm_edt_kern.o 183always-y += xdpsock_kern.o 184 185ifeq ($(ARCH), arm) 186# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux 187# headers when arm instruction set identification is requested. 188ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS)) 189BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR) 190TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR) 191endif 192 193ifeq ($(ARCH), mips) 194TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__ 195ifdef CONFIG_MACH_LOONGSON64 196BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64 197BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic 198endif 199endif 200 201TPROGS_CFLAGS += -Wall -O2 202TPROGS_CFLAGS += -Wmissing-prototypes 203TPROGS_CFLAGS += -Wstrict-prototypes 204 205TPROGS_CFLAGS += -I$(objtree)/usr/include 206TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ 207TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE) 208TPROGS_CFLAGS += -I$(srctree)/tools/include 209TPROGS_CFLAGS += -I$(srctree)/tools/perf 210TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0 211 212ifdef SYSROOT 213TPROGS_CFLAGS += --sysroot=$(SYSROOT) 214TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib 215endif 216 217TPROGS_LDLIBS += $(LIBBPF) -lelf -lz 218TPROGLDLIBS_tracex4 += -lrt 219TPROGLDLIBS_trace_output += -lrt 220TPROGLDLIBS_map_perf_test += -lrt 221TPROGLDLIBS_test_overhead += -lrt 222TPROGLDLIBS_xdpsock += -pthread -lcap 223TPROGLDLIBS_xsk_fwd += -pthread 224 225# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: 226# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang 227LLC ?= llc 228CLANG ?= clang 229OPT ?= opt 230LLVM_DIS ?= llvm-dis 231LLVM_OBJCOPY ?= llvm-objcopy 232LLVM_READELF ?= llvm-readelf 233BTF_PAHOLE ?= pahole 234 235# Detect that we're cross compiling and use the cross compiler 236ifdef CROSS_COMPILE 237CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%)) 238endif 239 240# Don't evaluate probes and warnings if we need to run make recursively 241ifneq ($(src),) 242HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \ 243 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \ 244 -o /dev/null 2>/dev/null && echo okay) 245 246ifeq ($(HDR_PROBE),) 247$(warning WARNING: Detected possible issues with include path.) 248$(warning WARNING: Please install kernel headers locally (make headers_install).) 249endif 250 251BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) 252BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) 253BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') 254BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ 255 $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ 256 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ 257 /bin/rm -f ./llvm_btf_verify.o) 258 259BPF_EXTRA_CFLAGS += -fno-stack-protector 260ifneq ($(BTF_LLVM_PROBE),) 261 BPF_EXTRA_CFLAGS += -g 262else 263ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) 264 BPF_EXTRA_CFLAGS += -g 265 LLC_FLAGS += -mattr=dwarfris 266 DWARF2BTF = y 267endif 268endif 269endif 270 271# Trick to allow make to be run from this directory 272all: 273 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR) 274 275clean: 276 $(MAKE) -C ../../ M=$(CURDIR) clean 277 @find $(CURDIR) -type f -name '*~' -delete 278 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool 279 280$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 281# Fix up variables inherited from Kbuild that tools/ build system won't like 282 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ 283 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \ 284 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \ 285 $@ install_headers 286 287BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool 288BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool 289BPFTOOL := $(BPFTOOL_OUTPUT)/bpftool 290$(BPFTOOL): $(LIBBPF) $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) 291 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ 292 OUTPUT=$(BPFTOOL_OUTPUT)/ \ 293 LIBBPF_OUTPUT=$(LIBBPF_OUTPUT)/ \ 294 LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/ 295 296$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 297 $(call msg,MKDIR,$@) 298 $(Q)mkdir -p $@ 299 300$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE 301 $(call filechk,offsets,__SYSCALL_NRS_H__) 302 303targets += syscall_nrs.s 304clean-files += syscall_nrs.h 305 306FORCE: 307 308 309# Verify LLVM compiler tools are available and bpf target is supported by llc 310.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) 311 312verify_cmds: $(CLANG) $(LLC) 313 @for TOOL in $^ ; do \ 314 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ 315 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ 316 exit 1; \ 317 else true; fi; \ 318 done 319 320verify_target_bpf: verify_cmds 321 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ 322 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ 323 echo " NOTICE: LLVM version >= 3.7.1 required" ;\ 324 exit 2; \ 325 else true; fi 326 327$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) 328$(src)/*.c: verify_target_bpf $(LIBBPF) 329 330libbpf_hdrs: $(LIBBPF) 331$(obj)/$(TRACE_HELPERS): | libbpf_hdrs 332 333.PHONY: libbpf_hdrs 334 335$(obj)/xdp_redirect_cpu_user.o: $(obj)/xdp_redirect_cpu.skel.h 336$(obj)/xdp_redirect_map_multi_user.o: $(obj)/xdp_redirect_map_multi.skel.h 337$(obj)/xdp_redirect_map_user.o: $(obj)/xdp_redirect_map.skel.h 338$(obj)/xdp_redirect_user.o: $(obj)/xdp_redirect.skel.h 339$(obj)/xdp_monitor_user.o: $(obj)/xdp_monitor.skel.h 340 341$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h 342$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 343$(obj)/hbm.o: $(src)/hbm.h 344$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h 345 346-include $(BPF_SAMPLES_PATH)/Makefile.target 347 348VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \ 349 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \ 350 $(abspath ./vmlinux) 351VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 352 353$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) 354ifeq ($(VMLINUX_H),) 355 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 356else 357 $(Q)cp "$(VMLINUX_H)" $@ 358endif 359 360ifeq ($(VMLINUX_BTF),) 361 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\ 362 build the kernel or set VMLINUX_BTF variable) 363endif 364 365clean-files += vmlinux.h 366 367# Get Clang's default includes on this system, as opposed to those seen by 368# '-target bpf'. This fixes "missing" files on some architectures/distros, 369# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 370# 371# Use '-idirafter': Don't interfere with include mechanics except where the 372# build would have failed anyways. 373define get_sys_includes 374$(shell $(1) -v -E - </dev/null 2>&1 \ 375 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 376$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/') 377endef 378 379CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 380 381$(obj)/xdp_redirect_cpu.bpf.o: $(obj)/xdp_sample.bpf.o 382$(obj)/xdp_redirect_map_multi.bpf.o: $(obj)/xdp_sample.bpf.o 383$(obj)/xdp_redirect_map.bpf.o: $(obj)/xdp_sample.bpf.o 384$(obj)/xdp_redirect.bpf.o: $(obj)/xdp_sample.bpf.o 385$(obj)/xdp_monitor.bpf.o: $(obj)/xdp_sample.bpf.o 386 387$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h 388 @echo " CLANG-BPF " $@ 389 $(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \ 390 -Wno-compare-distinct-pointer-types -I$(srctree)/include \ 391 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ 392 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ 393 -c $(filter %.bpf.c,$^) -o $@ 394 395LINKED_SKELS := xdp_redirect_cpu.skel.h xdp_redirect_map_multi.skel.h \ 396 xdp_redirect_map.skel.h xdp_redirect.skel.h xdp_monitor.skel.h 397clean-files += $(LINKED_SKELS) 398 399xdp_redirect_cpu.skel.h-deps := xdp_redirect_cpu.bpf.o xdp_sample.bpf.o 400xdp_redirect_map_multi.skel.h-deps := xdp_redirect_map_multi.bpf.o xdp_sample.bpf.o 401xdp_redirect_map.skel.h-deps := xdp_redirect_map.bpf.o xdp_sample.bpf.o 402xdp_redirect.skel.h-deps := xdp_redirect.bpf.o xdp_sample.bpf.o 403xdp_monitor.skel.h-deps := xdp_monitor.bpf.o xdp_sample.bpf.o 404 405LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps))) 406 407BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) 408BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) 409BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) 410 411$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL) 412 @echo " BPF GEN-OBJ " $(@:.skel.h=) 413 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps)) 414 @echo " BPF GEN-SKEL" $(@:.skel.h=) 415 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@ 416 417# asm/sysreg.h - inline assembly used by it is incompatible with llvm. 418# But, there is no easy way to fix it, so just exclude it since it is 419# useless for BPF samples. 420# below we use long chain of commands, clang | opt | llvm-dis | llc, 421# to generate final object file. 'clang' compiles the source into IR 422# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin 423# processing (llvm12) and IR optimizations. 'llvm-dis' converts 424# 'opt' output to IR, and finally 'llc' generates bpf byte code. 425$(obj)/%.o: $(src)/%.c 426 @echo " CLANG-bpf " $@ 427 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \ 428 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \ 429 -I$(LIBBPF_INCLUDE) \ 430 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ 431 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \ 432 -Wno-gnu-variable-sized-type-not-at-end \ 433 -Wno-address-of-packed-member -Wno-tautological-compare \ 434 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ 435 -fno-asynchronous-unwind-tables \ 436 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ 437 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ 438 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ 439 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ 440ifeq ($(DWARF2BTF),y) 441 $(BTF_PAHOLE) -J $@ 442endif 443