Andrii Nakryiko
e83b9f5544
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>
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>
2019-04-03 00:53:07 +02:00
Fonts: New Terminus large console font
2018-12-19 10:42:08 +01:00
livepatch: Proper error handling in the shadow variables selftest
2019-02-06 11:01:57 +01:00
lib/lz4: update LZ4 decompressor module
2018-10-31 08:54:14 -07:00
lib/lzo: separate lzo-rle from lzo
2019-03-07 18:32:03 -08:00
ARM updates for 5.1-rc1
2019-03-15 14:37:46 -07:00
lib/xz: Put CRC32_POLY_LE in xz_private.h
2018-10-02 08:44:59 +10:00
lib/zlib_inflate/inflate.c: remove fall through warnings
2018-10-31 08:54:13 -07:00
lib: add crc64 calculation routines
2018-08-22 10:52:48 -07:00
lib/assoc_array.c: mark expected switch fall-through
2019-03-07 18:32:00 -08:00
lib/bch: fix possible stack overrun
2018-10-12 09:17:46 +02:00
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
kprobes: Prohibit probing on bsearch()
2019-02-13 08:16:41 +01:00
ila: make lockdep happy again
2018-08-16 12:14:42 -07:00
s390: use common bust_spinlocks()
2018-11-30 07:22:05 +01:00
crypto: chacha - add XChaCha12 support
2018-11-20 14:26:55 +08:00
lib: cordic: Move cordic macros and defines to header file
2018-11-29 17:30:48 +02:00
treewide: add checks for the return value of memblock_alloc*()
2019-03-12 10:04:02 -07:00
crc-t10dif: crc_t10dif_mutex can be static
2018-09-14 14:08:52 +08:00
lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure
2019-02-15 19:50:07 +01:00
lib: add crc64 calculation routines
2018-08-22 10:52:48 -07:00
locking/lockdep: Make global debug_locks* variables read-mostly
2018-10-19 07:53:18 +02:00
debugobjects: call debug_objects_mem_init eariler
2018-12-28 12:11:45 -08:00
devres: always use dev_name() in devm_ioremap_resource()
2019-01-31 19:28:40 +01:00
lib/div64.c: off by one in shift
2019-03-07 18:32:00 -08:00
dynamic_debug: move pr_err from module.c to ddebug_add_module
2019-03-07 18:32:00 -08:00
lib/find_bit_benchmark.c: align test_find_next_and_bit with others
2019-01-04 13:13:46 -08:00
lib/gcd: Remove use of CPU_NO_EFFICIENT_FFS macro
2018-11-12 14:26:21 -08:00
lib: don't depend on linux headers being installed.
2018-12-29 11:36:44 -08:00
lib/genalloc.c: include vmalloc.h
2019-01-05 13:54:53 -08:00
generic radix trees
2019-03-12 10:04:02 -07:00
radix tree: Remove radix_tree_update_node_t
2018-10-21 10:46:44 -04:00
fix int_sqrt64() for very large numbers
2019-01-21 07:20:18 +13:00
iomap: introduce io{read|write}64_{lo_hi|hi_lo}
2019-01-22 13:39:59 +01:00
lib/ioremap: ensure break-before-make is used for huge p4d mappings
2018-12-28 12:11:50 -08:00
iov_iter: optimize page_copy_sane()
2019-02-26 14:05:20 -05:00
lib/irq_poll: Support schedules in non-interrupt contexts
2019-02-19 20:52:19 -07:00
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md into for-linus
2019-01-03 08:21:02 -07:00
kbuild: add ability to generate BTF type info for vmlinux
2019-04-03 00:53:07 +02:00
kasan: remove use after scope bugs detection.
2019-03-05 21:07:13 -08:00
lib/ubsan: default UBSAN_ALIGNMENT to not set
2019-03-07 18:32:02 -08:00
kobject: make kset_get_ownership() 'static'
2019-01-22 14:25:26 +01:00
kobject: drop newline from msg string
2019-01-22 14:25:26 +01:00
lib/kstrtox.c: delete unnecessary casts
2018-10-31 08:54:13 -07:00
locking/lockdep: Make it easy to detect whether or not inside a selftest
2019-02-28 07:55:43 +01:00
libfdt: prefix header search paths with $(srctree)/
2019-03-14 02:36:04 +09:00
lib: Fix ia64 bootloader linkage
2018-10-16 13:45:44 +02:00
netlink: Add strict version of nlmsg_parse and nla_parse
2018-10-08 10:39:04 -07:00
lib: objagg: fix handling of object with 0 users when assembling hints
2019-02-14 12:41:54 -05:00
lib/parser.c: switch match_number() over to use match_strdup()
2018-10-31 08:54:12 -07:00
percpu-refcount: Replace call_rcu_sched() with call_rcu()
2018-11-27 09:21:45 -08:00
notifier: Remove notifier header file wherever not used
2018-08-30 12:56:40 +02:00
radix tree: Don't return retry entries from lookup
2018-12-06 08:26:16 -05:00
refcount_t: Add ACQUIRE ordering on success for dec(sub)_and_test() variants
2019-02-04 09:03:31 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-03-27 17:37:58 -07:00
sbitmap: Protect swap_lock from hardirq
2019-01-15 16:29:57 +12:00
lib/scatterlist: Provide a DMA page iterator
2019-02-11 15:02:33 -07:00
seq_buf: Use size_t for len in seq_buf_puts()
2018-12-22 08:21:03 -05:00
lib/sg_pool.c: remove unnecessary null check when freeing object
2018-10-31 08:54:13 -07:00
lib/show_mem.c: drop pgdat_resize_lock in show_mem()
2018-12-28 12:11:49 -08:00
kprobes: Prohibit probing on preemption checking debug functions
2019-02-13 08:16:40 +01:00
lib: Fix ia64 bootloader linkage
2018-10-16 13:45:44 +02:00
make 'user_access_begin()' do 'access_ok()'
2019-01-04 12:56:09 -08:00
make 'user_access_begin()' do 'access_ok()'
2019-01-04 12:56:09 -08:00
bpf: test_bpf: turn off preemption in function __run_once
2019-02-25 22:18:07 +01:00
lib: fix build failure in CONFIG_DEBUG_VIRTUAL test
2018-12-17 22:12:30 +11:00
lib/test_firmware.c: remove some dead code
2019-03-07 18:32:00 -08:00
test_hexdump: use memcpy instead of strncpy
2018-11-30 12:13:15 -08:00
test_ida: Fix lockdep warning
2018-10-15 16:31:29 -04:00
kasan: remove use after scope bugs detection.
2019-03-05 21:07:13 -08:00
lib/test_kmod.c: potential double free in error handling
2019-02-01 15:46:23 -08:00
lib: Fix ia64 bootloader linkage
2018-10-16 13:45:44 +02:00
test_objagg: Uninitialized variable in error handling
2019-02-13 22:13:29 -08:00
lib/vsprintf: Print time and date in human readable format via %pt
2018-12-10 22:39:34 +01:00
rhashtable: Remove obsolete rhashtable_walk_init function
2019-02-22 13:49:00 +01:00
lib: Introduce test_stackinit module
2019-03-04 09:29:52 -08:00
lib/test_ubsan.c: VLA no longer used in kernel
2019-03-07 18:32:00 -08:00
vmalloc: add test driver to analyse vmalloc allocator
2019-03-05 21:07:15 -08:00
XArray: Fix xa_reserve for 2-byte aligned entries
2019-02-21 17:54:44 -05:00
lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
2018-11-18 10:15:10 -08:00
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
Printk changes for 5.1
2019-03-09 09:22:42 -08:00
XArray: Fix xa_reserve for 2-byte aligned entries
2019-02-21 17:54:44 -05:00
e83b9f5544