451 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			Makefile
		
	
	
	
	
	
			
		
		
	
	
			451 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			Makefile
		
	
	
	
	
	
| # SPDX-License-Identifier: GPL-2.0
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| 
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| BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
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| TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
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| 
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| pound := \#
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| 
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| # List of programs to build
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| tprogs-y := test_lru_dist
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| tprogs-y += sock_example
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| tprogs-y += fds_example
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| tprogs-y += sockex1
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| tprogs-y += sockex2
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| tprogs-y += sockex3
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| tprogs-y += tracex1
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| tprogs-y += tracex2
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| tprogs-y += tracex3
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| tprogs-y += tracex4
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| tprogs-y += tracex5
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| tprogs-y += tracex6
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| tprogs-y += tracex7
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| tprogs-y += test_probe_write_user
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| tprogs-y += trace_output
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| tprogs-y += lathist
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| tprogs-y += offwaketime
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| tprogs-y += spintest
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| tprogs-y += map_perf_test
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| tprogs-y += test_overhead
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| tprogs-y += test_cgrp2_array_pin
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| tprogs-y += test_cgrp2_attach
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| tprogs-y += test_cgrp2_sock
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| tprogs-y += test_cgrp2_sock2
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| tprogs-y += xdp1
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| tprogs-y += xdp2
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| tprogs-y += xdp_router_ipv4
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| tprogs-y += test_current_task_under_cgroup
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| tprogs-y += trace_event
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| tprogs-y += sampleip
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| tprogs-y += tc_l2_redirect
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| tprogs-y += lwt_len_hist
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| tprogs-y += xdp_tx_iptunnel
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| tprogs-y += test_map_in_map
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| tprogs-y += per_socket_stats_example
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| tprogs-y += xdp_rxq_info
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| tprogs-y += syscall_tp
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| tprogs-y += cpustat
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| tprogs-y += xdp_adjust_tail
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| tprogs-y += xdp_fwd
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| tprogs-y += task_fd_query
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| tprogs-y += xdp_sample_pkts
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| tprogs-y += ibumad
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| tprogs-y += hbm
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| 
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| tprogs-y += xdp_redirect_cpu
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| tprogs-y += xdp_redirect_map_multi
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| tprogs-y += xdp_redirect_map
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| tprogs-y += xdp_redirect
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| tprogs-y += xdp_monitor
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| 
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| # Libbpf dependencies
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| LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf
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| LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf
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| LIBBPF_DESTDIR = $(LIBBPF_OUTPUT)
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| LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
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| LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a
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| 
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| CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
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| TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
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| XDP_SAMPLE := xdp_sample_user.o
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| 
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| fds_example-objs := fds_example.o
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| sockex1-objs := sockex1_user.o
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| sockex2-objs := sockex2_user.o
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| sockex3-objs := sockex3_user.o
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| tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
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| tracex2-objs := tracex2_user.o
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| tracex3-objs := tracex3_user.o
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| tracex4-objs := tracex4_user.o
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| tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
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| tracex6-objs := tracex6_user.o
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| tracex7-objs := tracex7_user.o
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| test_probe_write_user-objs := test_probe_write_user_user.o
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| trace_output-objs := trace_output_user.o
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| lathist-objs := lathist_user.o
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| offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
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| spintest-objs := spintest_user.o $(TRACE_HELPERS)
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| map_perf_test-objs := map_perf_test_user.o
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| test_overhead-objs := test_overhead_user.o
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| test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
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| test_cgrp2_attach-objs := test_cgrp2_attach.o
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| test_cgrp2_sock-objs := test_cgrp2_sock.o
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| test_cgrp2_sock2-objs := test_cgrp2_sock2.o
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| xdp1-objs := xdp1_user.o
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| # reuse xdp1 source intentionally
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| xdp2-objs := xdp1_user.o
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| test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
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| 				       test_current_task_under_cgroup_user.o
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| trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
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| sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
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| tc_l2_redirect-objs := tc_l2_redirect_user.o
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| lwt_len_hist-objs := lwt_len_hist_user.o
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| xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
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| test_map_in_map-objs := test_map_in_map_user.o
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| per_socket_stats_example-objs := cookie_uid_helper_example.o
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| xdp_rxq_info-objs := xdp_rxq_info_user.o
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| syscall_tp-objs := syscall_tp_user.o
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| cpustat-objs := cpustat_user.o
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| xdp_adjust_tail-objs := xdp_adjust_tail_user.o
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| xdp_fwd-objs := xdp_fwd_user.o
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| task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
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| xdp_sample_pkts-objs := xdp_sample_pkts_user.o
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| ibumad-objs := ibumad_user.o
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| hbm-objs := hbm.o $(CGROUP_HELPERS)
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| 
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| xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o $(XDP_SAMPLE)
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| xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o $(XDP_SAMPLE)
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| xdp_redirect_map-objs := xdp_redirect_map_user.o $(XDP_SAMPLE)
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| xdp_redirect-objs := xdp_redirect_user.o $(XDP_SAMPLE)
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| xdp_monitor-objs := xdp_monitor_user.o $(XDP_SAMPLE)
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| xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE)
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| 
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| # Tell kbuild to always build the programs
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| always-y := $(tprogs-y)
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| always-y += sockex1_kern.o
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| always-y += sockex2_kern.o
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| always-y += sockex3_kern.o
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| always-y += tracex1_kern.o
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| always-y += tracex2_kern.o
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| always-y += tracex3_kern.o
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| always-y += tracex4_kern.o
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| always-y += tracex5_kern.o
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| always-y += tracex6_kern.o
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| always-y += tracex7_kern.o
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| always-y += sock_flags_kern.o
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| always-y += test_probe_write_user_kern.o
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| always-y += trace_output_kern.o
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| always-y += tcbpf1_kern.o
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| always-y += tc_l2_redirect_kern.o
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| always-y += lathist_kern.o
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| always-y += offwaketime_kern.o
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| always-y += spintest_kern.o
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| always-y += map_perf_test_kern.o
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| always-y += test_overhead_tp_kern.o
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| always-y += test_overhead_raw_tp_kern.o
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| always-y += test_overhead_kprobe_kern.o
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| always-y += parse_varlen.o parse_simple.o parse_ldabs.o
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| always-y += test_cgrp2_tc_kern.o
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| always-y += xdp1_kern.o
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| always-y += xdp2_kern.o
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| always-y += test_current_task_under_cgroup_kern.o
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| always-y += trace_event_kern.o
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| always-y += sampleip_kern.o
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| always-y += lwt_len_hist_kern.o
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| always-y += xdp_tx_iptunnel_kern.o
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| always-y += test_map_in_map_kern.o
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| always-y += tcp_synrto_kern.o
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| always-y += tcp_rwnd_kern.o
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| always-y += tcp_bufs_kern.o
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| always-y += tcp_cong_kern.o
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| always-y += tcp_iw_kern.o
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| always-y += tcp_clamp_kern.o
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| always-y += tcp_basertt_kern.o
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| always-y += tcp_tos_reflect_kern.o
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| always-y += tcp_dumpstats_kern.o
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| always-y += xdp_rxq_info_kern.o
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| always-y += xdp2skb_meta_kern.o
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| always-y += syscall_tp_kern.o
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| always-y += cpustat_kern.o
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| always-y += xdp_adjust_tail_kern.o
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| always-y += xdp_fwd_kern.o
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| always-y += task_fd_query_kern.o
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| always-y += xdp_sample_pkts_kern.o
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| always-y += ibumad_kern.o
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| always-y += hbm_out_kern.o
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| always-y += hbm_edt_kern.o
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| 
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| ifeq ($(ARCH), arm)
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| # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
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| # headers when arm instruction set identification is requested.
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| ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
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| BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
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| TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
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| endif
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| 
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| ifeq ($(ARCH), mips)
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| TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__
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| ifdef CONFIG_MACH_LOONGSON64
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| BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64
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| BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic
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| endif
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| endif
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| 
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| TPROGS_CFLAGS += -Wall -O2
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| TPROGS_CFLAGS += -Wmissing-prototypes
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| TPROGS_CFLAGS += -Wstrict-prototypes
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| 
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| TPROGS_CFLAGS += -I$(objtree)/usr/include
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| TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
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| TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE)
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| TPROGS_CFLAGS += -I$(srctree)/tools/include
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| TPROGS_CFLAGS += -I$(srctree)/tools/perf
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| TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
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| 
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| ifdef SYSROOT
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| TPROGS_CFLAGS += --sysroot=$(SYSROOT)
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| TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
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| endif
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| 
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| TPROGS_LDLIBS			+= $(LIBBPF) -lelf -lz
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| TPROGLDLIBS_xdp_monitor		+= -lm
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| TPROGLDLIBS_xdp_redirect	+= -lm
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| TPROGLDLIBS_xdp_redirect_cpu	+= -lm
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| TPROGLDLIBS_xdp_redirect_map	+= -lm
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| TPROGLDLIBS_xdp_redirect_map_multi += -lm
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| TPROGLDLIBS_xdp_router_ipv4	+= -lm -pthread
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| TPROGLDLIBS_tracex4		+= -lrt
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| TPROGLDLIBS_trace_output	+= -lrt
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| TPROGLDLIBS_map_perf_test	+= -lrt
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| TPROGLDLIBS_test_overhead	+= -lrt
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| 
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| # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
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| # make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
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| LLC ?= llc
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| CLANG ?= clang
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| OPT ?= opt
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| LLVM_DIS ?= llvm-dis
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| LLVM_OBJCOPY ?= llvm-objcopy
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| LLVM_READELF ?= llvm-readelf
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| BTF_PAHOLE ?= pahole
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| 
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| # Detect that we're cross compiling and use the cross compiler
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| ifdef CROSS_COMPILE
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| CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
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| endif
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| 
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| # Don't evaluate probes and warnings if we need to run make recursively
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| ifneq ($(src),)
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| HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
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| 	$(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
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| 	-o /dev/null 2>/dev/null && echo okay)
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| 
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| ifeq ($(HDR_PROBE),)
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| $(warning WARNING: Detected possible issues with include path.)
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| $(warning WARNING: Please install kernel headers locally (make headers_install).)
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| endif
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| 
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| BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
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| BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
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| BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
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| BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
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| 			  $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
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| 			  $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
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| 			  /bin/rm -f ./llvm_btf_verify.o)
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| 
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| BPF_EXTRA_CFLAGS += -fno-stack-protector
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| ifneq ($(BTF_LLVM_PROBE),)
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| 	BPF_EXTRA_CFLAGS += -g
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| else
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| ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
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| 	BPF_EXTRA_CFLAGS += -g
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| 	LLC_FLAGS += -mattr=dwarfris
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| 	DWARF2BTF = y
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| endif
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| endif
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| endif
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| 
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| # Trick to allow make to be run from this directory
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| all:
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| 	$(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
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| 
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| clean:
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| 	$(MAKE) -C ../../ M=$(CURDIR) clean
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| 	@find $(CURDIR) -type f -name '*~' -delete
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| 	@$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool
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| 
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| $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
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| # Fix up variables inherited from Kbuild that tools/ build system won't like
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| 	$(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
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| 		LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \
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| 		O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
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| 		$@ install_headers
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| 
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| BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
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| BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
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| BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
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| $(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
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| 	$(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ 		\
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| 		OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
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| 
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| $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
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| 	$(call msg,MKDIR,$@)
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| 	$(Q)mkdir -p $@
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| 
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| $(obj)/syscall_nrs.h:	$(obj)/syscall_nrs.s FORCE
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| 	$(call filechk,offsets,__SYSCALL_NRS_H__)
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| 
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| targets += syscall_nrs.s
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| clean-files += syscall_nrs.h
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| 
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| FORCE:
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| 
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| 
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| # Verify LLVM compiler tools are available and bpf target is supported by llc
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| .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
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| 
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| verify_cmds: $(CLANG) $(LLC)
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| 	@for TOOL in $^ ; do \
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| 		if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
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| 			echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
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| 			exit 1; \
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| 		else true; fi; \
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| 	done
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| 
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| verify_target_bpf: verify_cmds
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| 	@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
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| 		echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
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| 		echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
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| 		exit 2; \
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| 	else true; fi
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| 
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| $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
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| $(src)/*.c: verify_target_bpf $(LIBBPF)
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| 
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| libbpf_hdrs: $(LIBBPF)
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| $(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs
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| 
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| .PHONY: libbpf_hdrs
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| 
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| $(obj)/xdp_redirect_cpu_user.o: $(obj)/xdp_redirect_cpu.skel.h
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| $(obj)/xdp_redirect_map_multi_user.o: $(obj)/xdp_redirect_map_multi.skel.h
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| $(obj)/xdp_redirect_map_user.o: $(obj)/xdp_redirect_map.skel.h
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| $(obj)/xdp_redirect_user.o: $(obj)/xdp_redirect.skel.h
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| $(obj)/xdp_monitor_user.o: $(obj)/xdp_monitor.skel.h
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| $(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h
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| 
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| $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
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| $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
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| $(obj)/hbm.o: $(src)/hbm.h
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| $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
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| 
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| # Override includes for xdp_sample_user.o because $(srctree)/usr/include in
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| # TPROGS_CFLAGS causes conflicts
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| XDP_SAMPLE_CFLAGS += -Wall -O2 \
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| 		     -I$(src)/../../tools/include \
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| 		     -I$(src)/../../tools/include/uapi \
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| 		     -I$(LIBBPF_INCLUDE) \
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| 		     -I$(src)/../../tools/testing/selftests/bpf
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| 
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| $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS)
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| $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
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| 
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| -include $(BPF_SAMPLES_PATH)/Makefile.target
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| 
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| VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux))				\
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| 		     $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux))	\
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| 		     $(abspath ./vmlinux)
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| VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
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| 
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| $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)
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| ifeq ($(VMLINUX_H),)
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| ifeq ($(VMLINUX_BTF),)
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| 	$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\
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| 		build the kernel or set VMLINUX_BTF or VMLINUX_H variable)
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| endif
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| 	$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
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| else
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| 	$(Q)cp "$(VMLINUX_H)" $@
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| endif
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| 
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| clean-files += vmlinux.h
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| 
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| # Get Clang's default includes on this system, as opposed to those seen by
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| # '-target bpf'. This fixes "missing" files on some architectures/distros,
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| # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
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| #
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| # Use '-idirafter': Don't interfere with include mechanics except where the
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| # build would have failed anyways.
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| define get_sys_includes
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| $(shell $(1) -v -E - </dev/null 2>&1 \
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|         | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
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| $(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
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| endef
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| 
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| CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
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| 
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| $(obj)/xdp_redirect_cpu.bpf.o: $(obj)/xdp_sample.bpf.o
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| $(obj)/xdp_redirect_map_multi.bpf.o: $(obj)/xdp_sample.bpf.o
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| $(obj)/xdp_redirect_map.bpf.o: $(obj)/xdp_sample.bpf.o
 | |
| $(obj)/xdp_redirect.bpf.o: $(obj)/xdp_sample.bpf.o
 | |
| $(obj)/xdp_monitor.bpf.o: $(obj)/xdp_sample.bpf.o
 | |
| $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o
 | |
| 
 | |
| $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h
 | |
| 	@echo "  CLANG-BPF " $@
 | |
| 	$(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \
 | |
| 		-Wno-compare-distinct-pointer-types -I$(srctree)/include \
 | |
| 		-I$(srctree)/samples/bpf -I$(srctree)/tools/include \
 | |
| 		-I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \
 | |
| 		-c $(filter %.bpf.c,$^) -o $@
 | |
| 
 | |
| LINKED_SKELS := xdp_redirect_cpu.skel.h xdp_redirect_map_multi.skel.h \
 | |
| 		xdp_redirect_map.skel.h xdp_redirect.skel.h xdp_monitor.skel.h \
 | |
| 		xdp_router_ipv4.skel.h
 | |
| clean-files += $(LINKED_SKELS)
 | |
| 
 | |
| xdp_redirect_cpu.skel.h-deps := xdp_redirect_cpu.bpf.o xdp_sample.bpf.o
 | |
| xdp_redirect_map_multi.skel.h-deps := xdp_redirect_map_multi.bpf.o xdp_sample.bpf.o
 | |
| xdp_redirect_map.skel.h-deps := xdp_redirect_map.bpf.o xdp_sample.bpf.o
 | |
| xdp_redirect.skel.h-deps := xdp_redirect.bpf.o xdp_sample.bpf.o
 | |
| xdp_monitor.skel.h-deps := xdp_monitor.bpf.o xdp_sample.bpf.o
 | |
| xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o
 | |
| 
 | |
| LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
 | |
| 
 | |
| BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c))
 | |
| BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED))
 | |
| BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS))
 | |
| 
 | |
| $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL)
 | |
| 	@echo "  BPF GEN-OBJ " $(@:.skel.h=)
 | |
| 	$(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps))
 | |
| 	@echo "  BPF GEN-SKEL" $(@:.skel.h=)
 | |
| 	$(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.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.
 | |
| # below we use long chain of commands, clang | opt | llvm-dis | llc,
 | |
| # to generate final object file. 'clang' compiles the source into IR
 | |
| # with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
 | |
| # processing (llvm12) and IR optimizations. 'llvm-dis' converts
 | |
| # 'opt' output to IR, and finally 'llc' generates bpf byte code.
 | |
| $(obj)/%.o: $(src)/%.c
 | |
| 	@echo "  CLANG-bpf " $@
 | |
| 	$(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
 | |
| 		-I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
 | |
| 		-I$(LIBBPF_INCLUDE) \
 | |
| 		-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
 | |
| 		-D__TARGET_ARCH_$(SRCARCH) -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 $(CLANG_ARCH_ARGS) \
 | |
| 		-fno-asynchronous-unwind-tables \
 | |
| 		-I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
 | |
| 		-O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
 | |
| 		$(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
 | |
| 		$(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
 | |
| ifeq ($(DWARF2BTF),y)
 | |
| 	$(BTF_PAHOLE) -J $@
 | |
| endif
 |