mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![]() - fix randconfig to generate a sane .config - rename hostprogs-y / always to hostprogs / always-y, which are more natual syntax. - optimize scripts/kallsyms - fix yes2modconfig and mod2yesconfig - make multiple directory targets ('make foo/ bar/') work -----BEGIN PGP SIGNATURE----- iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAl47NfMVHG1hc2FoaXJv eUBrZXJuZWwub3JnAAoJED2LAQed4NsGRGwP/3AHO8P0wGEeFKs3ziSMjs2W7/Pj lN08Kuxm0u3LnyEEcHVUveoi+xBYqvrw0RsGgYf5S8q0Mpep7MPqbfkDUxV/0Zkj QP2CsvOTbjdBjH7q3ojkwLcDl0Pxu9mg3eZMRXZ2WQeNXuMRw6Bicoh7ElvB1Bv/ HC+j30i2Me3cf/riQGSAsstvlXyIR8RaerR8PfRGESTysiiN76+JcHTatJHhOJL9 O6XKkzo8/CXMYKKVF4Ae4NP+WFg6E96/pAPx0Rf47RbPX9UG35L9rkzTDnk70Ms6 OhKiu3hXsRX7mkqApuoTqjge4+iiQcKZxYmMXU1vGlIRzjwg19/4YFP6pDSCcnIu kKb8KN4o4N41N7MFS3OLZWwISA8Vw6RbtwDZ3AghDWb7EHb9oNW42mGfcAPr1+wZ /KH6RHTzaz+5q2MgyMY1NhADFrhIT9CvDM+UJECgbokblnw7PHAnPmbsuVak9ZOH u9ojO1HpTTuIYO6N6v4K5zQBZF1N+RvkmBnhHd8j6SksppsCoC/G62QxgXhF2YK3 FQMpATCpuyengLxWAmPEjsyyPOlrrdu9UxqNsXVy5ol40+7zpxuHwKcQKCa9urJR rcpbIwLaBcLhHU4BmvBxUk5aZxxGV2F0O0gXTOAbT2xhd6BipZSMhUmN49SErhQm NC/coUmQX7McxMXh =sv4U -----END PGP SIGNATURE----- Merge tag 'kbuild-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - fix randconfig to generate a sane .config - rename hostprogs-y / always to hostprogs / always-y, which are more natual syntax. - optimize scripts/kallsyms - fix yes2modconfig and mod2yesconfig - make multiple directory targets ('make foo/ bar/') work * tag 'kbuild-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: make multiple directory targets work kconfig: Invalidate all symbols after changing to y or m. kallsyms: fix type of kallsyms_token_table[] scripts/kallsyms: change table to store (strcut sym_entry *) scripts/kallsyms: rename local variables in read_symbol() kbuild: rename hostprogs-y/always to hostprogs/always-y kbuild: fix the document to use extra-y for vmlinux.lds kconfig: fix broken dependency in randconfig-generated .config |
||
---|---|---|
.. | ||
.gitignore | ||
asm_goto_workaround.h | ||
bpf_insn.h | ||
bpf_load.c | ||
bpf_load.h | ||
cookie_uid_helper_example.c | ||
cpustat_kern.c | ||
cpustat_user.c | ||
do_hbm_test.sh | ||
fds_example.c | ||
hash_func01.h | ||
hbm.c | ||
hbm.h | ||
hbm_edt_kern.c | ||
hbm_kern.h | ||
hbm_out_kern.c | ||
ibumad_kern.c | ||
ibumad_user.c | ||
lathist_kern.c | ||
lathist_user.c | ||
lwt_len_hist.sh | ||
lwt_len_hist_kern.c | ||
lwt_len_hist_user.c | ||
Makefile | ||
Makefile.target | ||
map_perf_test_kern.c | ||
map_perf_test_user.c | ||
offwaketime_kern.c | ||
offwaketime_user.c | ||
parse_ldabs.c | ||
parse_simple.c | ||
parse_varlen.c | ||
README.rst | ||
run_cookie_uid_helper_example.sh | ||
sampleip_kern.c | ||
sampleip_user.c | ||
sock_example.c | ||
sock_example.h | ||
sock_flags_kern.c | ||
sockex1_kern.c | ||
sockex1_user.c | ||
sockex2_kern.c | ||
sockex2_user.c | ||
sockex3_kern.c | ||
sockex3_user.c | ||
spintest_kern.c | ||
spintest_user.c | ||
syscall_nrs.c | ||
syscall_tp_kern.c | ||
syscall_tp_user.c | ||
task_fd_query_kern.c | ||
task_fd_query_user.c | ||
tc_l2_redirect.sh | ||
tc_l2_redirect_kern.c | ||
tc_l2_redirect_user.c | ||
tcbpf1_kern.c | ||
tcp_basertt_kern.c | ||
tcp_bpf.readme | ||
tcp_bufs_kern.c | ||
tcp_clamp_kern.c | ||
tcp_cong_kern.c | ||
tcp_dumpstats_kern.c | ||
tcp_iw_kern.c | ||
tcp_rwnd_kern.c | ||
tcp_synrto_kern.c | ||
tcp_tos_reflect_kern.c | ||
test_cgrp2_array_pin.c | ||
test_cgrp2_attach.c | ||
test_cgrp2_sock.c | ||
test_cgrp2_sock.sh | ||
test_cgrp2_sock2.c | ||
test_cgrp2_sock2.sh | ||
test_cgrp2_tc.sh | ||
test_cgrp2_tc_kern.c | ||
test_cls_bpf.sh | ||
test_current_task_under_cgroup_kern.c | ||
test_current_task_under_cgroup_user.c | ||
test_ipip.sh | ||
test_lru_dist.c | ||
test_lwt_bpf.c | ||
test_lwt_bpf.sh | ||
test_map_in_map_kern.c | ||
test_map_in_map_user.c | ||
test_overhead_kprobe_kern.c | ||
test_overhead_raw_tp_kern.c | ||
test_overhead_tp_kern.c | ||
test_overhead_user.c | ||
test_override_return.sh | ||
test_probe_write_user_kern.c | ||
test_probe_write_user_user.c | ||
trace_event_kern.c | ||
trace_event_user.c | ||
trace_output_kern.c | ||
trace_output_user.c | ||
tracex1_kern.c | ||
tracex1_user.c | ||
tracex2_kern.c | ||
tracex2_user.c | ||
tracex3_kern.c | ||
tracex3_user.c | ||
tracex4_kern.c | ||
tracex4_user.c | ||
tracex5_kern.c | ||
tracex5_user.c | ||
tracex6_kern.c | ||
tracex6_user.c | ||
tracex7_kern.c | ||
tracex7_user.c | ||
xdp1_kern.c | ||
xdp1_user.c | ||
xdp2_kern.c | ||
xdp2skb_meta.sh | ||
xdp2skb_meta_kern.c | ||
xdp_adjust_tail_kern.c | ||
xdp_adjust_tail_user.c | ||
xdp_fwd_kern.c | ||
xdp_fwd_user.c | ||
xdp_monitor_kern.c | ||
xdp_monitor_user.c | ||
xdp_redirect_cpu_kern.c | ||
xdp_redirect_cpu_user.c | ||
xdp_redirect_kern.c | ||
xdp_redirect_map_kern.c | ||
xdp_redirect_map_user.c | ||
xdp_redirect_user.c | ||
xdp_router_ipv4_kern.c | ||
xdp_router_ipv4_user.c | ||
xdp_rxq_info_kern.c | ||
xdp_rxq_info_user.c | ||
xdp_sample_pkts_kern.c | ||
xdp_sample_pkts_user.c | ||
xdp_tx_iptunnel_common.h | ||
xdp_tx_iptunnel_kern.c | ||
xdp_tx_iptunnel_user.c | ||
xdpsock.h | ||
xdpsock_kern.c | ||
xdpsock_user.c |
eBPF sample programs ==================== This directory contains a test stubs, verifier test-suite and examples for using eBPF. The examples use libbpf from tools/lib/bpf. Build dependencies ================== Compiling requires having installed: * clang >= version 3.4.0 * llvm >= version 3.7.1 Note that LLVM's tool 'llc' must support target 'bpf', list version and supported targets with command: ``llc --version`` Clean and configuration ----------------------- It can be needed to clean tools, samples or kernel before trying new arch or after some changes (on demand):: make -C tools clean make -C samples/bpf clean make clean Configure kernel, defconfig for instance:: make defconfig Kernel headers -------------- There are usually dependencies to header files of the current kernel. To avoid installing devel kernel headers system wide, as a normal user, simply call:: make headers_install This will creates a local "usr/include" directory in the git/build top level directory, that the make system automatically pickup first. Compiling ========= For building the BPF samples, issue the below command from the kernel top level directory:: make M=samples/bpf It is also possible to call make from this directory. This will just hide the invocation of make as above. Manually compiling LLVM with 'bpf' support ------------------------------------------ Since version 3.7.0, LLVM adds a proper LLVM backend target for the BPF bytecode architecture. By default llvm will build all non-experimental backends including bpf. To generate a smaller llc binary one can use:: -DLLVM_TARGETS_TO_BUILD="BPF" Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):: $ git clone http://llvm.org/git/llvm.git $ cd llvm/tools $ git clone --depth 1 http://llvm.org/git/clang.git $ cd ..; mkdir build; cd build $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" $ make -j $(getconf _NPROCESSORS_ONLN) It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:: make M=samples/bpf LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang Cross compiling samples ----------------------- In order to cross-compile, say for arm64 targets, export CROSS_COMPILE and ARCH environment variables before calling make. But do this before clean, cofiguration and header install steps described above. This will direct make to build samples for the cross target:: export ARCH=arm64 export CROSS_COMPILE="aarch64-linux-gnu-" Headers can be also installed on RFS of target board if need to keep them in sync (not necessarily and it creates a local "usr/include" directory also):: make INSTALL_HDR_PATH=~/some_sysroot/usr headers_install Pointing LLC and CLANG is not necessarily if it's installed on HOST and have in its targets appropriate arm64 arch (usually it has several arches). Build samples:: make M=samples/bpf Or build samples with SYSROOT if some header or library is absent in toolchain, say libelf, providing address to file system containing headers and libs, can be RFS of target board:: make M=samples/bpf SYSROOT=~/some_sysroot