Andrii Nakryiko
df7bdcc9f7
BACKPORT: kbuild: add ability to generate BTF type info for vmlinux ...
This patch adds new config option to trigger generation of BTF type
information from DWARF debuginfo for vmlinux and kernel modules through
pahole, which in turn relies on libbpf for btf_dedup() algorithm.
The intent is to record compact type information of all types used
inside kernel, including all the structs/unions/typedefs/etc. This
enables BPF's compile-once-run-everywhere ([0]) approach, in which
tracing programs that are inspecting kernel's internal data (e.g.,
struct task_struct) can be compiled on a system running some kernel
version, but would be possible to run on other kernel versions (and
configurations) without recompilation, even if the layout of structs
changed and/or some of the fields were added, removed, or renamed.
This is only possible if BPF loader can get kernel type info to adjust
all the offsets correctly. This patch is a first time in this direction,
making sure that BTF type info is part of Linux kernel image in
non-loadable ELF section.
BTF deduplication ([1]) algorithm typically provides 100x savings
compared to DWARF data, so resulting .BTF section is not big as is
typically about 2MB in size.
[0] http://vger.kernel.org/lpc-bpf2018.html#session-2
[1] https://facebookmicrosites.github.io/bpf/blog/2018/11/14/btf-enhancement.html
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Change-Id: Id935f6e3ac658d9a92d55acd39e8287c644c941d
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sorayukii <sorayukii69@gmail.com>
2026-05-15 17:58:04 +07:00
fixdep: faster CONFIG_ search
2016-08-24 22:34:19 +02:00
fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock
2019-06-11 12:22:49 +02:00
Merge remote-tracking branch 'common/android-4.9-q' into android12-4.9-sdm845
2022-03-31 22:52:51 +03:00
gcc-plugins: latent_entropy: use /dev/urandom
2022-04-20 09:06:46 +02:00
scripts/gdb: fix lx-version string output
2021-01-12 19:49:03 +01:00
kbuild: Regenerate genksyms lexer
2016-08-25 20:03:51 +02:00
kconfig/lxdialog: Make main() return 0
2024-10-09 17:15:11 +03:00
This is the 4.9.321 stable release
2022-07-03 10:09:05 +02:00
builddeb: Fix header package regarding dtc source links
2018-05-30 07:50:39 +02:00
selinux: use "grep -E" instead of "egrep"
2022-10-26 13:15:38 +02:00
scripts/tracing: fix the bug that can't parse raw_trace_func
2021-08-15 13:01:03 +02:00
kbuild: make scripts/adjust_autoksyms.sh robust against timestamp races
2018-05-30 07:50:37 +02:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
ASN.1: fix open failure check on headername
2016-04-06 14:06:48 +01:00
scripts: switch explicitly to Python 3
2021-06-03 08:23:27 +02:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
BACKPORT: bpf: add script and prepare bpf.h for new helpers documentation
2026-05-15 17:56:21 +07:00
scripts: build-all.py: set clang as REAL_CC for arm
2020-02-27 21:25:17 -08:00
scripts: snapshot of kernel build utility scripts
2016-08-08 15:22:37 -07:00
scripts: snapshot of kernel build utility scripts
2016-08-08 15:22:37 -07:00
scripts: snapshot of kernel build utility scripts
2016-08-08 15:22:37 -07:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
checkkconfigsymbols: use arglist instead of cmd string
2016-08-28 11:08:34 +02:00
Merge tag 'LA.UM.10.3.r1-01000-sdm845.0' of https://source.codeaurora.org/quic/la/kernel/msm-4.9 into android12-4.9-sdm845
2022-03-31 20:16:10 +03:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
ANDROID: Kbuild, LLVMLinux: allow overriding clang target triple
2018-11-28 17:35:40 -08:00
FROMLIST: kbuild: add clang-version.sh
2018-02-28 15:09:57 -08:00
coccinelle: fix parallel build with CHECK=scripts/coccicheck
2017-12-14 09:28:22 +01:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
const_structs.checkpatch: remove drm_connector from the list
2018-02-04 21:39:49 -08:00
scripts/decode_stacktrace: strip basepath from all paths
2020-07-31 16:44:03 +02:00
scripts/decodecode: fix trapping instruction formatting
2020-05-20 08:15:29 +02:00
depmod: handle the case of /sbin/depmod without /sbin in PATH
2021-01-12 19:49:01 +01:00
scripts: switch explicitly to Python 3
2021-06-03 08:23:27 +02:00
docproc: print a comment about autogeneration for rst output
2016-05-14 09:56:56 -06:00
cert host tools: Stop complaining about deprecated OpenSSL functions
2022-11-25 17:35:37 +01:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
scripts/faddr2line: improve on base path filtering a bit
2016-09-19 14:49:08 -07:00
gcc-plugins: abort builds cleanly when not supported
2016-08-08 17:49:05 -07:00
scripts/has-stack-protector: add -fno-PIE
2016-11-09 22:28:05 +01:00
initramfs: Escape colons in depfile
2016-09-23 10:35:32 +02:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
get_maintainer: quiet noisy implicit -f vcs_file_exists checking
2016-08-26 17:39:34 -07:00
headers_check: don't warn about c++ guards
2016-05-24 14:12:48 +10:00
scripts/kallsyms: remove redundant is_arm_mapping_symbol()
2026-05-15 17:48:21 +07:00
arm64: build with baremetal linker target instead of Linux when available
2022-10-13 01:53:43 +03:00
scripts/kernel-doc: Don't fail with status != 0 if error encountered with -none
2018-02-25 11:05:47 +01:00
ld-version: Drop the 4th and 5th version components
2016-05-13 14:02:05 +02:00
BACKPORT: kbuild: add ability to generate BTF type info for vmlinux
2026-05-15 17:58:04 +07:00
scripts: set proper OpenSSL include dir also for sign-file
2021-03-07 11:25:55 +01:00
kbuild: replace genhdr-y with generated-y
2020-04-09 15:53:27 +05:30
Merge branch 'android-4.9-q' of https://android.googlesource.com/kernel/common into lineage-18.1-caf-sdm845
2021-04-26 01:27:02 +03:00
ANDROID: kbuild: Makefile.clean: make Kbuild and Makefile optional
2017-01-27 13:52:26 -08:00
scripts: Makefile: Add multi overlay dtbo-base apply verify
2017-11-24 16:56:41 +08:00
Makefile.extrawarn: Move -Wcast-function-type-strict to W=1
2022-10-26 13:15:33 +02:00
gcc-plugins: Add latent_entropy plugin
2016-10-10 14:51:44 -07:00
kbuild: skip install/check of headers right under uapi directories
2020-04-09 16:19:34 +05:30
kbuild: use HOSTLDFLAGS for single .c executables
2022-10-13 01:53:40 +03:00
This is the 4.9.121 stable release
2018-08-17 21:31:08 +02:00
dtc: Silence warnings
2022-10-13 01:53:45 +03:00
ANDROID: kbuild: make it possible to specify the module output dir
2017-01-27 13:52:26 -08:00
This is the 4.9.327 stable release
2022-09-05 14:02:59 +02:00
Kbuild: enable -Wmaybe-uninitialized warning for "make W=1"
2016-11-11 08:45:08 -08:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
scripts: Support a custom compiler name
2026-05-15 17:48:21 +07:00
mksysmap: Fix the mismatch of '.L' symbols in System.map
2020-06-30 15:38:23 -04:00
objtool, modules: Discard objtool annotation sections for modules
2018-01-17 09:38:58 +01:00
namespace: fix namespace.pl script to support relative paths
2019-10-29 09:15:06 +01:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
This is the 4.9.262 stable release
2021-03-17 17:12:54 +01:00
recordmcount: Fix spurious mcount entries on powerpc
2019-08-04 09:33:38 +02:00
recordmcount.pl: fix typo in s390 mcount regex
2022-01-05 12:31:24 +01:00
script: Do not append a plus behind the localversion
2026-05-15 17:48:21 +07:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
cert host tools: Stop complaining about deprecated OpenSSL functions
2022-11-25 17:35:37 +01:00
parisc: Use generic extable search and sort routines
2016-03-23 16:00:46 +01:00
spelling.txt: "modeled" is spelt correctly
2016-10-07 18:46:30 -07:00
tweewide: Fix most Shebang lines
2021-06-03 08:23:27 +02:00
BACKPORT: mm: split page_type out from _mapcount
2026-05-15 17:57:58 +07:00
unifdef: use memcpy instead of strncpy
2018-12-08 13:05:05 +01:00
ver_linux: rename ver_linux.awk to ver_linux
2016-08-31 13:59:31 +02:00
df7bdcc9f7