Thomas Gleixner 4f5416710e vmlinux.lds.h: Create section for protection against instrumentation ... [ Upstream commit 6553896666433e7efec589838b400a2a652b3ffa ] Some code pathes, especially the low level entry code, must be protected against instrumentation for various reasons: - Low level entry code can be a fragile beast, especially on x86. - With NO_HZ_FULL RCU state needs to be established before using it. Having a dedicated section for such code allows to validate with tooling that no unsafe functions are invoked. Add the .noinstr.text section and the noinstr attribute to mark functions. noinstr implies notrace. Kprobes will gain a section check later. Provide also a set of markers: instrumentation_begin()/end() These are used to mark code inside a noinstr function which calls into regular instrumentable text section as safe. The instrumentation markers are only active when CONFIG_DEBUG_ENTRY is enabled as the end marker emits a NOP to prevent the compiler from merging the annotation points. This means the objtool verification requires a kernel compiled with this option. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200505134100.075416272@linutronix.de Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-02-17 10:35:16 +01:00
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atomic	…
basic	kbuild: remove unneeded comments and code from scripts/basic/Makefile	2019-08-29 23:54:29 +09:00
coccinelle	scripts: add dummy report mode to add_namespace.cocci	2020-08-11 15:33:35 +02:00
dtc	scripts/dtc: only append to HOST_EXTRACFLAGS instead of overwriting	2020-10-07 08:01:29 +02:00
gcc-plugins	gcc-common.h: Update for GCC 10	2020-05-27 17:46:24 +02:00
gdb	scripts/gdb: fix lx-symbols 'gdb.error' while loading modules	2020-07-29 10:18:35 +02:00
genksyms	genksyms: convert to SPDX License Identifier for lex.l and parse.y	2019-09-14 11:40:13 +09:00
kconfig	kconfig: fix return value of do_error_if()	2020-12-30 11:51:29 +01:00
ksymoops	…
mod	vmlinux.lds.h: Create section for protection against instrumentation	2021-02-17 10:35:16 +01:00
package	kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables	2020-09-03 11:27:10 +02:00
selinux	…
tracing	…
.gitignore	…
Kbuild.include	kbuild: improve cc-option to clean up all temporary files	2020-06-30 15:37:05 -04:00
Kconfig.include	kconfig: introduce m32-flag and m64-flag	2020-04-08 09:08:37 +02:00
Lindent	…
Makefile	Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity	2019-09-27 19:37:27 -07:00
Makefile.asm-generic	…
Makefile.build	kbuild: avoid split lines in .mod files	2020-12-30 11:50:57 +01:00
Makefile.clean	kbuild: clean up subdir-ymn calculation in Makefile.clean	2019-08-29 23:54:29 +09:00
Makefile.dtbinst	…
Makefile.extrawarn	kbuild: Disable -Wpointer-to-enum-cast	2020-03-25 08:25:54 +01:00
Makefile.gcc-plugins	…
Makefile.headersinst	kbuild: move headers_check rule to usr/include/Makefile	2020-03-05 16:43:47 +01:00
Makefile.host	kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj)	2019-09-04 23:12:50 +09:00
Makefile.kasan	kasan/arm64: fix CONFIG_KASAN_SW_TAGS && KASAN_INLINE	2019-08-15 13:24:04 +01:00
Makefile.kcov	…
Makefile.lib	kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables	2020-09-03 11:27:10 +02:00
Makefile.modbuiltin	kbuild: get rid of kernel/ prefix from in-tree modules.{order,builtin}	2019-07-17 22:39:27 +09:00
Makefile.modfinal	kbuild: move modkern_{c,a}flags to Makefile.lib from Makefile.build	2019-08-22 01:14:11 +09:00
Makefile.modinst	kbuild: modinst: read modules.order instead of $(MODVERDIR)/*.mod	2019-07-17 22:39:27 +09:00
Makefile.modpost	Modules updates for v5.4	2019-09-22 10:34:46 -07:00
Makefile.modsign	kbuild: modsign: read modules.order instead of $(MODVERDIR)/*.mod	2019-07-17 22:39:27 +09:00
Makefile.package	kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables	2020-09-03 11:27:10 +02:00
Makefile.ubsan	…
adjust_autoksyms.sh	kbuild: remove the first line of *.mod files	2019-07-18 02:19:31 +09:00
asn1_compiler.c	…
bin2c.c	…
bloat-o-meter	…
bootgraph.pl	…
bpf_helpers_doc.py	…
cc-can-link.sh	…
check_extable.sh	…
checkincludes.pl	…
checkkconfigsymbols.py	…
checkpatch.pl	checkpatch: fix unescaped left brace	2020-12-30 11:51:27 +01:00
checkstack.pl	…
checksyscalls.sh	…
checkversion.pl	…
clang-version.sh	…
cleanfile	…
cleanpatch	…
coccicheck	…
config	scripts/config: allow colons in option strings for sed	2020-05-10 10:31:27 +02:00
conmakehash.c	…
const_structs.checkpatch	…
decode_stacktrace.sh	scripts/decode_stacktrace: strip basepath from all paths	2020-07-29 10:18:35 +02:00
decodecode	scripts/decodecode: fix trapping instruction formatting	2020-05-14 07:58:29 +02:00
depmod.sh	depmod: handle the case of /sbin/depmod without /sbin in PATH	2021-01-12 20:16:10 +01:00
diffconfig	…
documentation-file-ref-check	…
export_report.pl	modpost: move the namespace field in Module.symvers last	2020-03-25 08:25:55 +01:00
extract-cert.c	…
extract-ikconfig	…
extract-module-sig.pl	…
extract-sys-certs.pl	…
extract-vmlinux	…
extract_xc3028.pl	…
faddr2line	…
file-size.sh	…
find-unused-docs.sh	scripts/find-unused-docs: Fix massive false positives	2020-02-11 04:35:23 -08:00
gcc-goto.sh	…
gcc-ld	…
gcc-plugin.sh	…
gcc-version.sh	…
gcc-x86_32-has-stack-protector.sh	…
gcc-x86_64-has-stack-protector.sh	…
gen_compile_commands.py	gen_compile_commands: lower the entry count threshold	2019-07-27 12:18:19 +09:00
gen_ksymdeps.sh	…
get_abi.pl	…
get_dvb_firmware	…
get_maintainer.pl	get_maintainer: add ability to skip moderated mailing lists	2019-07-16 19:23:22 -07:00
gfp-translate	…
headerdep.pl	…
headers_check.pl	…
headers_install.sh	scripts: headers_install: Exit with error on config leak	2020-06-24 17:50:33 +02:00
insert-sys-cert.c	…
kallsyms.c	scripts/kallsyms: fix definitely-lost memory leak	2020-01-04 19:18:23 +01:00
kernel-doc	kernel-doc: Allow anonymous enum	2019-08-12 15:00:37 -06:00
ld-version.sh	…
leaking_addresses.pl	…
link-vmlinux.sh	bpf: Support llvm-objcopy for vmlinux BTF	2020-06-17 16:40:20 +02:00
makelst	…
markup_oops.pl	…
mkcompile_h	Kbuild: Handle PREEMPT_RT for version string and magic	2019-08-14 01:10:42 +09:00
mkmakefile	kbuild: get rid of $(realpath ...) from scripts/mkmakefile	2019-08-29 23:54:29 +09:00
mksysmap	mksysmap: Fix the mismatch of '.L' symbols in System.map	2020-06-24 17:50:19 +02:00
mkuboot.sh	…
module-common.lds	…
modules-check.sh	kbuild: get rid of kernel/ prefix from in-tree modules.{order,builtin}	2019-07-17 22:39:27 +09:00
namespace.pl	namespace: fix namespace.pl script to support relative paths	2019-10-05 15:29:49 +09:00
nsdeps	scripts: add dummy report mode to add_namespace.cocci	2020-08-11 15:33:35 +02:00
objdiff	…
parse-maintainers.pl	parse-maintainers: Mark as executable	2020-03-25 08:25:49 +01:00
patch-kernel	…
pnmtologo.c	…
profile2linkerlist.pl	…
prune-kernel	…
recordmcount.c	recordmcount: Fix build failure on non arm64	2020-08-21 13:05:36 +02:00
recordmcount.h	recordmcount: support >64k sections	2020-06-30 15:37:05 -04:00
recordmcount.pl	…
setlocalversion	scripts/setlocalversion: make git describe output more reliable	2020-11-01 12:01:01 +01:00
show_delta	…
sign-file.c	…
sortextable.c	…
sortextable.h	…
spdxcheck-test.sh	…
spdxcheck.py	…
spelling.txt	scripts/spelling.txt: add more spellings to spelling.txt	2019-07-12 11:05:41 -07:00
sphinx-pre-install	scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output	2019-07-17 06:57:52 -03:00
split-man.pl	…
stackdelta	…
stackusage	…
subarch.include	…
tags.sh	kbuild: add a flag to force absolute path for srctree	2019-07-11 00:05:09 +09:00
tools-support-relr.sh	scripts/tools-support-relr.sh: un-quote variables	2019-11-13 10:52:05 +00:00
unifdef.c	…
ver_linux	…
xen-hypercalls.sh	…
xz_wrap.sh	kbuild: add variables for compression tools	2020-09-03 11:27:10 +02:00