Thomas Gleixner 3461326e1a x86/extable: Rework the exception table mechanics ... [ Upstream commit 46d28947d9 ] The exception table entries contain the instruction address, the fixup address and the handler address. All addresses are relative. Storing the handler address has a few downsides: 1) Most handlers need to be exported 2) Handlers can be defined everywhere and there is no overview about the handler types 3) MCE needs to check the handler type to decide whether an in kernel #MC can be recovered. The functionality of the handler itself is not in any way special, but for these checks there need to be separate functions which in the worst case have to be exported. Some of these 'recoverable' exception fixups are pretty obscure and just reuse some other handler to spare code. That obfuscates e.g. the #MC safe copy functions. Cleaning that up would require more handlers and exports Rework the exception fixup mechanics by storing a fixup type number instead of the handler address and invoke the proper handler for each fixup type. Also teach the extable sort to leave the type field alone. This makes most handlers static except for special cases like the MCE MSR fixup and the BPF fixup. This allows to add more types for cleaning up the obscure places without adding more handler code and exports. There is a marginal code size reduction for a production config and it removes _eight_ exported symbols. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Alexei Starovoitov <ast@kernel.org> Link: https://lkml.kernel.org/r/20210908132525.211958725@linutronix.de Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-07-29 17:25:25 +02:00
..
atomic	atomics: Fix atomic64_{read_acquire,set_release} fallbacks	2022-04-08 14:23:57 +02:00
basic	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
clang-tools	gen_compile_commands: fix missing 'sys' package	2021-09-19 10:13:03 +09:00
coccinelle	scripts: coccinelle: allow list_entry_is_head() to use pos	2021-08-08 22:00:49 +02:00
dtc	scripts/dtc: Call pkg-config POSIXly correct	2022-04-08 14:23:29 +02:00
dummy-tools	kbuild: dummy-tools: adjust to stricter stackprotector check	2021-05-17 12:10:03 +09:00
gcc-plugins	gcc-plugins: latent_entropy: use /dev/urandom	2022-04-20 09:34:18 +02:00
gdb	scripts/gdb: change kernel config dumping method	2022-06-14 18:36:24 +02:00
genksyms	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
kconfig	kconfig: fix failing to generate auto.conf	2022-02-23 12:03:20 +01:00
ksymoops	…
mod	modpost: fix section mismatch check for exported init/exit sections	2022-06-29 09:03:31 +02:00
package	kbuild: buildtar: add riscv support	2021-03-29 23:13:30 -07:00
selinux	scripts/selinux,selinux: update mdp to enable policy capabilities	2020-08-17 20:42:00 -04:00
tracing	scripts/tracing: fix the bug that can't parse raw_trace_func	2021-08-04 17:49:26 -04:00
.gitignore	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
Kbuild.include	kbuild: warn if FORCE is missing for if_changed(_dep,_rule) and filechk	2021-09-03 08:17:19 +09:00
Kconfig.include	kbuild: check the minimum assembler version in Kconfig	2021-04-25 05:14:41 +09:00
Lindent	…
Makefile	Fix CVE-2020-26541	2021-04-26 08:38:10 -07:00
Makefile.asm-generic	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.build	x86/retbleed: Add fine grained Kconfig knobs	2022-07-23 12:54:10 +02:00
Makefile.clang	kbuild: Add -Werror=ignored-optimization-argument to CLANG_FLAGS	2021-09-19 10:55:18 +09:00
Makefile.clean	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.compiler	kbuild: remove TMPO from try-run	2021-04-25 05:25:56 +09:00
Makefile.dtbinst	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.extrawarn	Makefile.extrawarn: Move -Wunaligned-access to W=1	2022-02-16 12:56:39 +01:00
Makefile.gcc-plugins	gcc-plugins/structleak: add makefile var for disabling structleak	2021-10-06 17:53:29 -06:00
Makefile.headersinst	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.host	kbuild: sort hostprogs before passing it to ifneq	2020-08-10 01:32:59 +09:00
Makefile.kasan	kasan: always respect CONFIG_KASAN_STACK	2021-09-24 16:13:35 -07:00
Makefile.kcov	kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled	2020-08-10 01:32:59 +09:00
Makefile.kcsan	Kbuild updates for v5.10	2020-10-22 13:13:57 -07:00
Makefile.lib	kbuild: move objtool_args back to scripts/Makefile.build	2022-05-15 20:18:50 +02:00
Makefile.modfinal	kbuild: Fix TRIM_UNUSED_KSYMS with LTO_CLANG	2021-09-03 08:12:39 +09:00
Makefile.modinst	kbuild: add support for zstd compressed modules	2021-04-25 05:25:06 +09:00
Makefile.modpost	kbuild: Fix comment typo in scripts/Makefile.modpost	2021-09-19 10:14:19 +09:00
Makefile.package	kbuild: deb-pkg: change the source package name to linux-upstream	2021-04-25 05:30:45 +09:00
Makefile.ubsan	ubsan: remove CONFIG_UBSAN_OBJECT_SIZE	2022-04-13 20:59:27 +02:00
Makefile.userprogs	kbuild: add infrastructure to build userspace programs	2020-05-17 18:52:01 +09:00
adjust_autoksyms.sh	kbuild: redo fake deps at include/ksym/*.h	2021-09-03 08:17:21 +09:00
as-version.sh	kbuild: Switch to 'f' variants of integrated assembler flag	2021-09-03 08:17:20 +09:00
asn1_compiler.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36	2019-05-24 17:27:11 +02:00
bin2c.c	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
bloat-o-meter	scripts: switch explicitly to Python 3	2021-01-22 06:34:44 +09:00
bootgraph.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 391	2019-06-05 17:37:11 +02:00
bpf_doc.py	bpf: Introduce bpf timers.	2021-07-15 22:31:10 +02:00
cc-can-link.sh	bpfilter: check compiler capability in Kconfig	2018-06-28 13:36:39 +09:00
cc-version.sh	kbuild: collect minimum tool versions into scripts/min-tool-version.sh	2021-04-25 05:14:26 +09:00
check-sysctl-docs	docs: add a script to check sysctl docs	2020-02-25 03:35:16 -07:00
check_extable.sh	scripts: check_extable: fix typo in user error message	2021-09-08 11:50:28 -07:00
checkdeclares.pl	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
checkincludes.pl	…
checkkconfigsymbols.py	checkkconfigsymbols.py: Remove skipping of help lines in parse_kconfig_file	2021-09-19 10:13:03 +09:00
checkpatch.pl	Compiler Attributes: add __alloc_size() for better bounds checking	2022-07-12 16:35:01 +02:00
checkstack.pl	scripts/checkstack.pl: fix arm sp regex	2020-05-26 00:03:16 +09:00
checksyscalls.sh	checksyscalls: Unconditionally ignore fstat{,at}64	2021-10-07 17:16:28 -07:00
checkversion.pl	scripts: checkversion: modernize linux/version.h search strings	2021-08-05 20:55:39 +09:00
cleanfile	…
cleanpatch	…
coccicheck	scripts: coccicheck: fix troubles on non-English builds	2021-05-18 11:09:59 +02:00
config	kconfig: config script: add a little user help	2021-01-04 10:38:11 +09:00
const_structs.checkpatch	const_structs.checkpatch: add pinctrl_ops and pinmux_ops	2020-10-16 11:11:21 -07:00
decode_stacktrace.sh	scripts/decode_stacktrace.sh: indicate 'auto' can be used for base path	2021-07-08 11:48:22 -07:00
decodecode	scripts/decodecode: add the capability to supply the program counter	2020-10-13 18:38:26 -07:00
depmod.sh	depmod: handle the case of /sbin/depmod without /sbin in PATH	2021-01-01 12:26:39 -08:00
dev-needs.sh	scripts/dev-needs: Add script to list device dependencies	2020-09-04 18:19:37 +02:00
diffconfig	scripts: switch explicitly to Python 3	2021-01-22 06:34:44 +09:00
documentation-file-ref-check	documentation-file-ref-check: Make git check work for multiple working directories	2021-06-04 11:20:52 -06:00
export_report.pl	modpost: move the namespace field in Module.symvers last	2020-03-17 08:59:03 +09:00
extract-cert.c	extract-cert: add static to local data	2020-08-18 20:16:46 +09:00
extract-ikconfig	…
extract-module-sig.pl	…
extract-sys-certs.pl	…
extract-vmlinux	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378	2019-06-05 17:37:10 +02:00
extract_xc3028.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 339	2019-06-05 17:37:07 +02:00
faddr2line	faddr2line: Fix overlapping text section failures, the sequel	2022-06-22 14:22:02 +02:00
file-size.sh	…
find-unused-docs.sh	scripts/find-unused-docs: Fix massive false positives	2020-01-27 14:25:06 -07:00
gcc-goto.sh	jump_label: move 'asm goto' support test to Kconfig	2019-01-06 09:46:51 +09:00
gcc-ld	…
gcc-x86_32-has-stack-protector.sh	x86/stackprotector/32: Make the canary into a regular percpu variable	2021-03-08 13:19:05 +01:00
gcc-x86_64-has-stack-protector.sh	stack-protector: Fix test with 32-bit userland and CONFIG_64BIT=y	2018-06-25 23:21:13 +09:00
gen_autoksyms.sh	kbuild: Fix TRIM_UNUSED_KSYMS with LTO_CLANG	2021-09-03 08:12:39 +09:00
gen_ksymdeps.sh	kbuild: redo fake deps at include/ksym/*.h	2021-09-03 08:17:21 +09:00
generate_initcall_order.pl	init: lto: ensure initcall ordering	2021-01-14 08:21:09 -08:00
get_abi.pl	scripts: get_abi: ignore code blocks for cross-references	2021-03-31 13:53:16 -06:00
get_dvb_firmware	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61	2019-05-24 17:36:45 +02:00
get_feat.pl	scripts: get_feat.pl: reduce table width for all features output	2020-12-04 14:34:27 -07:00
get_maintainer.pl	get_maintainer: exclude MAINTAINERS file(s) from --git-fallback	2020-10-16 11:11:19 -07:00
gfp-translate	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
headerdep.pl	…
headers_check.pl	…
headers_install.sh	Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-08-07 13:29:39 -07:00
insert-sys-cert.c	…
jobserver-exec	scripts/jobserver-exec: Fix a typo ("envirnoment")	2021-05-17 12:10:03 +09:00
kallsyms.c	kallsyms: fix nonconverging kallsyms table with lld	2021-02-05 17:53:28 +09:00
kernel-doc	stddef: Introduce DECLARE_FLEX_ARRAY() helper	2022-07-12 16:35:03 +02:00
ld-version.sh	kbuild: collect minimum tool versions into scripts/min-tool-version.sh	2021-04-25 05:14:26 +09:00
leaking_addresses.pl	leaking_addresses: Always print a trailing newline	2021-11-18 19:16:16 +01:00
link-vmlinux.sh	x86/retbleed: Add fine grained Kconfig knobs	2022-07-23 12:54:10 +02:00
makelst	…
markup_oops.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 373	2019-06-05 17:37:10 +02:00
min-tool-version.sh	Documentation: raise minimum supported version of GCC to 5.1	2021-09-13 10:18:28 -07:00
mkcompile_h	kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set	2021-06-17 10:01:12 +09:00
mksysmap	mksysmap: Fix the mismatch of '.L' symbols in System.map	2020-06-06 23:39:20 +09:00
mkuboot.sh	…
module.lds.S	module: combine constructors in module linker script	2021-07-19 14:51:40 +02:00
modules-check.sh	kbuild: check module name conflict for external modules as well	2021-04-25 05:22:42 +09:00
nsdeps	kbuild: replace LANG=C with LC_ALL=C	2021-05-02 00:43:35 +09:00
objdiff	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 199	2019-05-30 11:29:23 -07:00
parse-maintainers.pl	parse-maintainers: Do not sort section content by default	2020-03-26 15:08:27 -07:00
patch-kernel	…
profile2linkerlist.pl	…
prune-kernel	…
recordmcount.c	ftrace: Have recordmcount use w8 to read relp->r_info in arm64_is_fake_mcount	2021-03-02 17:27:18 -05:00
recordmcount.h	recordmcount: Correct st_shndx handling	2021-06-18 09:09:17 -04:00
recordmcount.pl	recordmcount.pl: fix typo in s390 mcount regex	2022-01-05 12:42:33 +01:00
remove-stale-files	kbuild: add a script to remove stale generated files	2021-05-02 00:43:35 +09:00
setlocalversion	scripts/setlocalversion: fix a bug when LOCALVERSION is empty	2021-07-18 23:48:14 +09:00
show_delta	tweewide: Fix most Shebang lines	2020-12-08 23:30:04 +09:00
sign-file.c	…
sorttable.c	x86/extable: Rework the exception table mechanics	2022-07-29 17:25:25 +02:00
sorttable.h	scripts/sorttable: Implement build-time ORC unwind table sorting	2019-12-13 10:47:58 +01:00
spdxcheck-test.sh	scripts/spdxcheck-test.sh: Drop python2	2021-07-21 15:59:32 +02:00
spdxcheck.py	scripts/spdxcheck.py: Strictly read license files in utf-8	2021-07-12 09:56:50 -06:00
spelling.txt	scripts/spelling.txt: add more spellings to spelling.txt	2021-06-29 10:53:45 -07:00
sphinx-pre-install	scripts: sphinx-pre-install: Fix ctex support on Debian	2022-01-27 11:05:44 +01:00
split-man.pl	tweewide: Fix most Shebang lines	2020-12-08 23:30:04 +09:00
stackdelta	…
stackusage	…
subarch.include	parisc: Fix compile failure when building 64-bit kernel natively	2021-09-01 21:52:02 +02:00
syscallhdr.sh	scripts: check duplicated syscall number in syscall table	2021-07-09 04:00:39 +09:00
syscallnr.sh	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
syscalltbl.sh	scripts: check duplicated syscall number in syscall table	2021-07-09 04:00:39 +09:00
tags.sh	kbuild: replace LANG=C with LC_ALL=C	2021-05-02 00:43:35 +09:00
tools-support-relr.sh	Makefile: fix GDB warning with CONFIG_RELR	2021-06-08 13:09:34 +01:00
unifdef.c	unifdef: use memcpy instead of strncpy	2018-11-30 14:45:01 -08:00
ver_linux	Removed the oprofiled version option	2021-05-03 17:23:06 -06:00
xen-hypercalls.sh	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
xz_wrap.sh	kbuild: add variables for compression tools	2020-06-06 23:42:01 +09:00