mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 08:14:15 +08:00
b7b98f8689
Alexei Starovoitov says: ==================== pull-request: bpf-next 2021-11-01 We've added 181 non-merge commits during the last 28 day(s) which contain a total of 280 files changed, 11791 insertions(+), 5879 deletions(-). The main changes are: 1) Fix bpf verifier propagation of 64-bit bounds, from Alexei. 2) Parallelize bpf test_progs, from Yucong and Andrii. 3) Deprecate various libbpf apis including af_xdp, from Andrii, Hengqi, Magnus. 4) Improve bpf selftests on s390, from Ilya. 5) bloomfilter bpf map type, from Joanne. 6) Big improvements to JIT tests especially on Mips, from Johan. 7) Support kernel module function calls from bpf, from Kumar. 8) Support typeless and weak ksym in light skeleton, from Kumar. 9) Disallow unprivileged bpf by default, from Pawan. 10) BTF_KIND_DECL_TAG support, from Yonghong. 11) Various bpftool cleanups, from Quentin. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (181 commits) libbpf: Deprecate AF_XDP support kbuild: Unify options for BTF generation for vmlinux and modules selftests/bpf: Add a testcase for 64-bit bounds propagation issue. bpf: Fix propagation of signed bounds from 64-bit min/max into 32-bit. bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off. selftests/bpf: Fix also no-alu32 strobemeta selftest bpf: Add missing map_delete_elem method to bloom filter map selftests/bpf: Add bloom map success test for userspace calls bpf: Add alignment padding for "map_extra" + consolidate holes bpf: Bloom filter map naming fixups selftests/bpf: Add test cases for struct_ops prog bpf: Add dummy BPF STRUCT_OPS for test purpose bpf: Factor out helpers for ctx access checking bpf: Factor out a helper to prepare trampoline for struct_ops prog selftests, bpf: Fix broken riscv build riscv, libbpf: Add RISC-V (RV64) support to bpf_tracing.h tools, build: Add RISC-V to HOSTARCH parsing riscv, bpf: Increase the maximum number of iterations selftests, bpf: Add one test for sockmap with strparser selftests, bpf: Fix test_txmsg_ingress_parser error ... ==================== Link: https://lore.kernel.org/r/20211102013123.9005-1-alexei.starovoitov@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
443 lines
15 KiB
Makefile
443 lines
15 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
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TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
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pound := \#
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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 += xdpsock
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tprogs-y += xdpsock_ctrl_proc
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tprogs-y += xsk_fwd
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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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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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# 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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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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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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xdp_router_ipv4-objs := xdp_router_ipv4_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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xdpsock-objs := xdpsock_user.o
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xdpsock_ctrl_proc-objs := xdpsock_ctrl_proc.o
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xsk_fwd-objs := xsk_fwd.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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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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# 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 += xdp_router_ipv4_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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always-y += xdpsock_kern.o
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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 += $(ARM_ARCH_SELECTOR)
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endif
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ifeq ($(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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TPROGS_CFLAGS += -Wall -O2
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TPROGS_CFLAGS += -Wmissing-prototypes
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TPROGS_CFLAGS += -Wstrict-prototypes
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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$(srctree)/tools/perf
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TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
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ifdef SYSROOT
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TPROGS_CFLAGS += --sysroot=$(SYSROOT)
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TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
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endif
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TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
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TPROGLDLIBS_tracex4 += -lrt
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TPROGLDLIBS_trace_output += -lrt
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TPROGLDLIBS_map_perf_test += -lrt
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TPROGLDLIBS_test_overhead += -lrt
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TPROGLDLIBS_xdpsock += -pthread -lcap
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TPROGLDLIBS_xsk_fwd += -pthread
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# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
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# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
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LLC ?= llc
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CLANG ?= clang
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OPT ?= opt
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LLVM_DIS ?= llvm-dis
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LLVM_OBJCOPY ?= llvm-objcopy
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LLVM_READELF ?= llvm-readelf
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BTF_PAHOLE ?= pahole
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# Detect that we're cross compiling and use the cross compiler
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ifdef CROSS_COMPILE
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CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
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endif
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# Don't evaluate probes and warnings if we need to run make recursively
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ifneq ($(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) $(TPROGS_LDFLAGS) -x c - \
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-o /dev/null 2>/dev/null && echo okay)
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ifeq ($(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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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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$(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
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/bin/rm -f ./llvm_btf_verify.o)
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BPF_EXTRA_CFLAGS += -fno-stack-protector
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ifneq ($(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),$(BTF_OBJCOPY_PROBE)),)
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BPF_EXTRA_CFLAGS += -g
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LLC_FLAGS += -mattr=dwarfris
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DWARF2BTF = y
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endif
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endif
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endif
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# Trick to allow make to be run from this directory
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all:
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$(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
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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 $(CURDIR)/bpftool
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$(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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BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
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BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
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BPFTOOL := $(BPFTOOL_OUTPUT)/bpftool
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$(BPFTOOL): $(LIBBPF) $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
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$(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \
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OUTPUT=$(BPFTOOL_OUTPUT)/ \
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LIBBPF_OUTPUT=$(LIBBPF_OUTPUT)/ \
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LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/
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$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
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$(call msg,MKDIR,$@)
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$(Q)mkdir -p $@
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$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
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$(call filechk,offsets,__SYSCALL_NRS_H__)
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targets += syscall_nrs.s
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clean-files += syscall_nrs.h
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FORCE:
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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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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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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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$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
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$(src)/*.c: verify_target_bpf $(LIBBPF)
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libbpf_hdrs: $(LIBBPF)
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$(obj)/$(TRACE_HELPERS): | libbpf_hdrs
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.PHONY: libbpf_hdrs
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$(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)/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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-include $(BPF_SAMPLES_PATH)/Makefile.target
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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 $(VMLINUX_BTF_PATHS))))
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$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)
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ifeq ($(VMLINUX_H),)
|
|
$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
|
|
else
|
|
$(Q)cp "$(VMLINUX_H)" $@
|
|
endif
|
|
|
|
ifeq ($(VMLINUX_BTF),)
|
|
$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\
|
|
build the kernel or set VMLINUX_BTF variable)
|
|
endif
|
|
|
|
clean-files += vmlinux.h
|
|
|
|
# Get Clang's default includes on this system, as opposed to those seen by
|
|
# '-target bpf'. This fixes "missing" files on some architectures/distros,
|
|
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
|
|
#
|
|
# Use '-idirafter': Don't interfere with include mechanics except where the
|
|
# build would have failed anyways.
|
|
define get_sys_includes
|
|
$(shell $(1) -v -E - </dev/null 2>&1 \
|
|
| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
|
|
$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
|
|
endef
|
|
|
|
CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
|
|
|
|
$(obj)/xdp_redirect_cpu.bpf.o: $(obj)/xdp_sample.bpf.o
|
|
$(obj)/xdp_redirect_map_multi.bpf.o: $(obj)/xdp_sample.bpf.o
|
|
$(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)/%.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
|
|
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
|
|
|
|
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
|