# SPDX-License-Identifier: GPL-2.0 BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools # List of programs to buildhostprogs-y := test_lru_disthostprogs-y += sock_examplehostprogs-y += fds_examplehostprogs-y += sockex1hostprogs-y += sockex2hostprogs-y += sockex3hostprogs-y += tracex1hostprogs-y += tracex2hostprogs-y += tracex3hostprogs-y += tracex4hostprogs-y += tracex5hostprogs-y += tracex6hostprogs-y += tracex7hostprogs-y += test_probe_write_userhostprogs-y += trace_outputhostprogs-y += lathisthostprogs-y += offwaketimehostprogs-y += spintesthostprogs-y += map_perf_testhostprogs-y += test_overheadhostprogs-y += test_cgrp2_array_pinhostprogs-y += test_cgrp2_attachhostprogs-y += test_cgrp2_attach2hostprogs-y += test_cgrp2_sockhostprogs-y += test_cgrp2_sock2hostprogs-y += xdp1hostprogs-y += xdp2hostprogs-y += xdp_router_ipv4hostprogs-y += test_current_task_under_cgrouphostprogs-y += trace_eventhostprogs-y += sampleiphostprogs-y += tc_l2_redirecthostprogs-y += lwt_len_histhostprogs-y += xdp_tx_iptunnelhostprogs-y += test_map_in_maphostprogs-y += per_socket_stats_examplehostprogs-y += xdp_redirecthostprogs-y += xdp_redirect_maphostprogs-y += xdp_redirect_cpuhostprogs-y += xdp_monitorhostprogs-y += xdp_rxq_infohostprogs-y += syscall_tphostprogs-y += cpustathostprogs-y += xdp_adjust_tailhostprogs-y += xdpsockhostprogs-y += xdp_fwdhostprogs-y += task_fd_queryhostprogs-y += xdp_sample_pktshostprogs-y += ibumadhostprogs-y += hbm # Libbpf dependenciesLIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.oTRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o fds_example-objs := fds_example.osockex1-objs := sockex1_user.osockex2-objs := sockex2_user.osockex3-objs := bpf_load.o sockex3_user.otracex1-objs := bpf_load.o tracex1_user.otracex2-objs := bpf_load.o tracex2_user.otracex3-objs := bpf_load.o tracex3_user.otracex4-objs := bpf_load.o tracex4_user.otracex5-objs := bpf_load.o tracex5_user.otracex6-objs := bpf_load.o tracex6_user.otracex7-objs := bpf_load.o tracex7_user.otest_probe_write_user-objs := bpf_load.o test_probe_write_user_user.otrace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS)lathist-objs := bpf_load.o lathist_user.ooffwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS)spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS)map_perf_test-objs := bpf_load.o map_perf_test_user.otest_overhead-objs := bpf_load.o test_overhead_user.otest_cgrp2_array_pin-objs := test_cgrp2_array_pin.otest_cgrp2_attach-objs := test_cgrp2_attach.otest_cgrp2_attach2-objs := test_cgrp2_attach2.o $(CGROUP_HELPERS)test_cgrp2_sock-objs := test_cgrp2_sock.otest_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.oxdp1-objs := xdp1_user.o# reuse xdp1 source intentionallyxdp2-objs := xdp1_user.oxdp_router_ipv4-objs := xdp_router_ipv4_user.otest_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \ test_current_task_under_cgroup_user.otrace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS)sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS)tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.olwt_len_hist-objs := bpf_load.o lwt_len_hist_user.oxdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.otest_map_in_map-objs := bpf_load.o test_map_in_map_user.oper_socket_stats_example-objs := cookie_uid_helper_example.oxdp_redirect-objs := xdp_redirect_user.oxdp_redirect_map-objs := xdp_redirect_map_user.oxdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.oxdp_monitor-objs := bpf_load.o xdp_monitor_user.oxdp_rxq_info-objs := xdp_rxq_info_user.osyscall_tp-objs := bpf_load.o syscall_tp_user.ocpustat-objs := bpf_load.o cpustat_user.oxdp_adjust_tail-objs := xdp_adjust_tail_user.oxdpsock-objs := xdpsock_user.oxdp_fwd-objs := xdp_fwd_user.otask_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS) # Tell kbuild to always build the programsalways := $(hostprogs-y)always += sockex1_kern.oalways += sockex2_kern.oalways += sockex3_kern.oalways += tracex1_kern.oalways += tracex2_kern.oalways += tracex3_kern.oalways += tracex4_kern.oalways += tracex5_kern.oalways += tracex6_kern.oalways += tracex7_kern.oalways += sock_flags_kern.oalways += test_probe_write_user_kern.oalways += trace_output_kern.oalways += tcbpf1_kern.oalways += tc_l2_redirect_kern.oalways += lathist_kern.oalways += offwaketime_kern.oalways += spintest_kern.oalways += map_perf_test_kern.oalways += test_overhead_tp_kern.oalways += test_overhead_raw_tp_kern.oalways += test_overhead_kprobe_kern.oalways += parse_varlen.o parse_simple.o parse_ldabs.oalways += test_cgrp2_tc_kern.oalways += xdp1_kern.oalways += xdp2_kern.oalways += xdp_router_ipv4_kern.oalways += test_current_task_under_cgroup_kern.oalways += trace_event_kern.oalways += sampleip_kern.oalways += lwt_len_hist_kern.oalways += xdp_tx_iptunnel_kern.oalways += test_map_in_map_kern.oalways += cookie_uid_helper_example.oalways += tcp_synrto_kern.oalways += tcp_rwnd_kern.oalways += tcp_bufs_kern.oalways += tcp_cong_kern.oalways += tcp_iw_kern.oalways += tcp_clamp_kern.oalways += tcp_basertt_kern.oalways += tcp_tos_reflect_kern.oalways += xdp_redirect_kern.oalways += xdp_redirect_map_kern.oalways += xdp_redirect_cpu_kern.oalways += xdp_monitor_kern.oalways += xdp_rxq_info_kern.oalways += xdp2skb_meta_kern.oalways += syscall_tp_kern.oalways += cpustat_kern.oalways += xdp_adjust_tail_kern.oalways += xdp_fwd_kern.oalways += task_fd_query_kern.oalways += xdp_sample_pkts_kern.oalways += ibumad_kern.oalways += hbm_out_kern.o KBUILD_HOSTCFLAGS += -I$(objtree)/usr/includeKBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/includeKBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variableHOSTCFLAGS_trace_helpers.o += -I$(srctree)/tools/lib/bpf/ HOSTCFLAGS_trace_output_user.o += -I$(srctree)/tools/lib/bpf/HOSTCFLAGS_offwaketime_user.o += -I$(srctree)/tools/lib/bpf/HOSTCFLAGS_spintest_user.o += -I$(srctree)/tools/lib/bpf/HOSTCFLAGS_trace_event_user.o += -I$(srctree)/tools/lib/bpf/HOSTCFLAGS_sampleip_user.o += -I$(srctree)/tools/lib/bpf/HOSTCFLAGS_task_fd_query_user.o += -I$(srctree)/tools/lib/bpf/HOSTCFLAGS_xdp_sample_pkts_user.o += -I$(srctree)/tools/lib/bpf/ KBUILD_HOSTLDLIBS += $(LIBBPF) -lelfHOSTLDLIBS_tracex4 += -lrtHOSTLDLIBS_trace_output += -lrtHOSTLDLIBS_map_perf_test += -lrtHOSTLDLIBS_test_overhead += -lrtHOSTLDLIBS_xdpsock += -pthread # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clangLLC ?= llcCLANG ?= clangLLVM_OBJCOPY ?= llvm-objcopyBTF_PAHOLE ?= pahole # Detect that we're cross compiling and use the cross compilerifdef CROSS_COMPILEHOSTCC = $(CROSS_COMPILE)gccCLANG_ARCH_ARGS = -target $(ARCH)endif BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ readelf -S ./llvm_btf_verify.o | grep BTF; \ /bin/rm -f ./llvm_btf_verify.o) ifneq ($(BTF_LLVM_PROBE),) EXTRA_CFLAGS += -gelseifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) EXTRA_CFLAGS += -g LLC_FLAGS += -mattr=dwarfris DWARF2BTF = yendifendif # Trick to allow make to be run from this directoryall: $(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR) clean: $(MAKE) -C ../../ M=$(CURDIR) clean @rm -f *~ $(LIBBPF): FORCE# Fix up variables inherited from Kbuild that tools/ build system won't like $(MAKE) -C $(dir $@) RM='rm -rf' LDFLAGS= srctree=$(BPF_SAMPLES_PATH)/../../ O= $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE $(call filechk,offsets,__SYSCALL_NRS_H__) targets += syscall_nrs.sclean-files += syscall_nrs.h FORCE: # Verify LLVM compiler tools are available and bpf target is supported by llc.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC) verify_cmds: $(CLANG) $(LLC) @for TOOL in $^ ; do \ if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \ echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\ exit 1; \ else true; fi; \ done verify_target_bpf: verify_cmds @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ echo " NOTICE: LLVM version >= 3.7.1 required" ;\ exit 2; \ else true; fi $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)$(src)/*.c: verify_target_bpf $(LIBBPF) $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h$(obj)/hbm.o: $(src)/hbm.h # asm/sysreg.h - inline assembly used by it is incompatible with llvm.# But, there is no easy way to fix it, so just exclude it since it is# useless for BPF samples.$(obj)/%.o: $(src)/%.c @echo " CLANG-bpf " $@ $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \ -I$(srctree)/tools/testing/selftests/bpf/ \ -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \ -D__TARGET_ARCH_$(ARCH) -Wno-compare-distinct-pointer-types \ -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ifeq ($(DWARF2BTF),y) $(BTF_PAHOLE) -J $@endif
# SPDX-License-Identifier: GPL-2.0
BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
# List of programs to build
hostprogs-y := test_lru_dist
hostprogs-y += sock_example
hostprogs-y += fds_example
hostprogs-y += sockex1
hostprogs-y += sockex2
hostprogs-y += sockex3
hostprogs-y += tracex1
hostprogs-y += tracex2
hostprogs-y += tracex3
hostprogs-y += tracex4
hostprogs-y += tracex5
hostprogs-y += tracex6
hostprogs-y += tracex7
hostprogs-y += test_probe_write_user
hostprogs-y += trace_output
hostprogs-y += lathist
hostprogs-y += offwaketime
hostprogs-y += spintest
hostprogs-y += map_perf_test
hostprogs-y += test_overhead
hostprogs-y += test_cgrp2_array_pin
hostprogs-y += test_cgrp2_attach
hostprogs-y += test_cgrp2_attach2
hostprogs-y += test_cgrp2_sock
hostprogs-y += test_cgrp2_sock2
hostprogs-y += xdp1
hostprogs-y += xdp2
hostprogs-y += xdp_router_ipv4
hostprogs-y += test_current_task_under_cgroup
hostprogs-y += trace_event
hostprogs-y += sampleip
hostprogs-y += tc_l2_redirect
hostprogs-y += lwt_len_hist
hostprogs-y += xdp_tx_iptunnel
hostprogs-y += test_map_in_map
hostprogs-y += per_socket_stats_example
hostprogs-y += xdp_redirect
hostprogs-y += xdp_redirect_map
hostprogs-y += xdp_redirect_cpu
hostprogs-y += xdp_monitor
hostprogs-y += xdp_rxq_info
hostprogs-y += syscall_tp
hostprogs-y += cpustat
hostprogs-y += xdp_adjust_tail
hostprogs-y += xdpsock
hostprogs-y += xdp_fwd
hostprogs-y += task_fd_query
hostprogs-y += xdp_sample_pkts
hostprogs-y += ibumad
hostprogs-y += hbm
# Libbpf dependencies
LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
fds_example-objs := fds_example.o
sockex1-objs := sockex1_user.o
sockex2-objs := sockex2_user.o
sockex3-objs := bpf_load.o sockex3_user.o
tracex1-objs := bpf_load.o tracex1_user.o
tracex2-objs := bpf_load.o tracex2_user.o
tracex3-objs := bpf_load.o tracex3_user.o
tracex4-objs := bpf_load.o tracex4_user.o
tracex5-objs := bpf_load.o tracex5_user.o
tracex6-objs := bpf_load.o tracex6_user.o
tracex7-objs := bpf_load.o tracex7_user.o
test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o
trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS)
lathist-objs := bpf_load.o lathist_user.o
offwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS)
spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS)
map_perf_test-objs := bpf_load.o map_perf_test_user.o
test_overhead-objs := bpf_load.o test_overhead_user.o
test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
test_cgrp2_attach-objs := test_cgrp2_attach.o
test_cgrp2_attach2-objs := test_cgrp2_attach2.o $(CGROUP_HELPERS)
test_cgrp2_sock-objs := test_cgrp2_sock.o
test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o
xdp1-objs := xdp1_user.o
# reuse xdp1 source intentionally
xdp2-objs := xdp1_user.o
xdp_router_ipv4-objs := xdp_router_ipv4_user.o
test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \
test_current_task_under_cgroup_user.o
trace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS)
sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS)
tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o
lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o
xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
test_map_in_map-objs := bpf_load.o test_map_in_map_user.o
per_socket_stats_example-objs := cookie_uid_helper_example.o
xdp_redirect-objs := xdp_redirect_user.o
xdp_redirect_map-objs := xdp_redirect_map_user.o
xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o
xdp_monitor-objs := bpf_load.o xdp_monitor_user.o
xdp_rxq_info-objs := xdp_rxq_info_user.o
syscall_tp-objs := bpf_load.o syscall_tp_user.o
cpustat-objs := bpf_load.o cpustat_user.o
xdp_adjust_tail-objs := xdp_adjust_tail_user.o
xdpsock-objs := xdpsock_user.o
xdp_fwd-objs := xdp_fwd_user.o
task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)
hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
# Tell kbuild to always build the programs
always := $(hostprogs-y)
always += sockex1_kern.o
always += sockex2_kern.o
always += sockex3_kern.o
always += tracex1_kern.o
always += tracex2_kern.o
always += tracex3_kern.o
always += tracex4_kern.o
always += tracex5_kern.o
always += tracex6_kern.o
always += tracex7_kern.o
always += sock_flags_kern.o
always += test_probe_write_user_kern.o
always += trace_output_kern.o
always += tcbpf1_kern.o
always += tc_l2_redirect_kern.o
always += lathist_kern.o
always += offwaketime_kern.o
always += spintest_kern.o
always += map_perf_test_kern.o
always += test_overhead_tp_kern.o
always += test_overhead_raw_tp_kern.o
always += test_overhead_kprobe_kern.o
always += parse_varlen.o parse_simple.o parse_ldabs.o
always += test_cgrp2_tc_kern.o
always += xdp1_kern.o
always += xdp2_kern.o
always += xdp_router_ipv4_kern.o
always += test_current_task_under_cgroup_kern.o
always += trace_event_kern.o
always += sampleip_kern.o
always += lwt_len_hist_kern.o
always += xdp_tx_iptunnel_kern.o
always += test_map_in_map_kern.o
always += cookie_uid_helper_example.o
always += tcp_synrto_kern.o
always += tcp_rwnd_kern.o
always += tcp_bufs_kern.o
always += tcp_cong_kern.o
always += tcp_iw_kern.o
always += tcp_clamp_kern.o
always += tcp_basertt_kern.o
always += tcp_tos_reflect_kern.o
always += xdp_redirect_kern.o
always += xdp_redirect_map_kern.o
always += xdp_redirect_cpu_kern.o
always += xdp_monitor_kern.o
always += xdp_rxq_info_kern.o
always += xdp2skb_meta_kern.o
always += syscall_tp_kern.o
always += cpustat_kern.o
always += xdp_adjust_tail_kern.o
always += xdp_fwd_kern.o
always += task_fd_query_kern.o
always += xdp_sample_pkts_kern.o
always += ibumad_kern.o
always += hbm_out_kern.o
KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf
HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
HOSTCFLAGS_trace_helpers.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_trace_output_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_offwaketime_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_spintest_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_trace_event_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_sampleip_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_task_fd_query_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_xdp_sample_pkts_user.o += -I$(srctree)/tools/lib/bpf/
KBUILD_HOSTLDLIBS += $(LIBBPF) -lelf
HOSTLDLIBS_tracex4 += -lrt
HOSTLDLIBS_trace_output += -lrt
HOSTLDLIBS_map_perf_test += -lrt
HOSTLDLIBS_test_overhead += -lrt
HOSTLDLIBS_xdpsock += -pthread
# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
LLC ?= llc
CLANG ?= clang
LLVM_OBJCOPY ?= llvm-objcopy
BTF_PAHOLE ?= pahole
# Detect that we're cross compiling and use the cross compiler
ifdef CROSS_COMPILE
HOSTCC = $(CROSS_COMPILE)gcc
CLANG_ARCH_ARGS = -target $(ARCH)
endif
BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
$(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
readelf -S ./llvm_btf_verify.o | grep BTF; \
/bin/rm -f ./llvm_btf_verify.o)
ifneq ($(BTF_LLVM_PROBE),)
EXTRA_CFLAGS += -g
else
ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
EXTRA_CFLAGS += -g
LLC_FLAGS += -mattr=dwarfris
DWARF2BTF = y
endif
endif
# Trick to allow make to be run from this directory
all:
$(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR)
clean:
$(MAKE) -C ../../ M=$(CURDIR) clean
@rm -f *~
$(LIBBPF): FORCE
# Fix up variables inherited from Kbuild that tools/ build system won't like
$(MAKE) -C $(dir $@) RM='rm -rf' LDFLAGS= srctree=$(BPF_SAMPLES_PATH)/../../ O=
$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
$(call filechk,offsets,__SYSCALL_NRS_H__)
targets += syscall_nrs.s
clean-files += syscall_nrs.h
FORCE:
# Verify LLVM compiler tools are available and bpf target is supported by llc
.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
verify_cmds: $(CLANG) $(LLC)
@for TOOL in $^ ; do \
if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
exit 1; \
else true; fi; \
done
verify_target_bpf: verify_cmds
@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
echo " NOTICE: LLVM version >= 3.7.1 required" ;\
exit 2; \
else true; fi
$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
$(src)/*.c: verify_target_bpf $(LIBBPF)
$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
$(obj)/hbm.o: $(src)/hbm.h
# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
# But, there is no easy way to fix it, so just exclude it since it is
# useless for BPF samples.
$(obj)/%.o: $(src)/%.c
@echo " CLANG-bpf " $@
$(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
-I$(srctree)/tools/testing/selftests/bpf/ \
-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
-D__TARGET_ARCH_$(ARCH) -Wno-compare-distinct-pointer-types \
-Wno-gnu-variable-sized-type-not-at-end \
-Wno-address-of-packed-member -Wno-tautological-compare \
-Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
-I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
ifeq ($(DWARF2BTF),y)
$(BTF_PAHOLE) -J $@
endif