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Date: Mon, 23 May 2022 18:32:36 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
Peter Zijlstra <peterz@...radead.org>,
Josh Poimboeuf <jpoimboe@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] objtool changes for v5.19
Linus,
Please pull the latest objtool/core git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git objtool-core-2022-05-23
# HEAD: 22682a07acc308ef78681572e19502ce8893c4d4 objtool: Fix objtool regression on x32 systems
Objtool changes for this cycle were:
- Comprehensive interface overhaul:
=================================
Objtool's interface has some issues:
- Several features are done unconditionally, without any way to turn
them off. Some of them might be surprising. This makes objtool
tricky to use, and prevents porting individual features to other
arches.
- The config dependencies are too coarse-grained. Objtool enablement is
tied to CONFIG_STACK_VALIDATION, but it has several other features
independent of that.
- The objtool subcmds ("check" and "orc") are clumsy: "check" is really
a subset of "orc", so it has all the same options. The subcmd model
has never really worked for objtool, as it only has a single purpose:
"do some combination of things on an object file".
- The '--lto' and '--vmlinux' options are nonsensical and have
surprising behavior.
Overhaul the interface:
- get rid of subcmds
- make all features individually selectable
- remove and/or clarify confusing/obsolete options
- update the documentation
- fix some bugs found along the way
- Fix x32 regression
- Fix Kbuild cleanup bugs
- Add scripts/objdump-func helper script to disassemble a single function from an object file.
- Rewrite scripts/faddr2line to be section-aware, by basing it on 'readelf',
moving it away from 'nm', which doesn't handle multiple sections well,
which can result in decoding failure.
- Rewrite & fix symbol handling - which had a number of bugs wrt. object files
that don't have global symbols - which is rare but possible. Also fix a
bunch of symbol handling bugs found along the way.
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Thanks,
Ingo
------------------>
Borislav Petkov (1):
x86/cpu: Load microcode during restore_processor_state()
Dmitry Monakhov (1):
x86/unwind/orc: Recheck address range after stack info was updated
Josh Poimboeuf (27):
MAINTAINERS: Add x86 unwinding entry
objtool: Enable unreachable warnings for CLANG LTO
x86/static_call: Add ANNOTATE_NOENDBR to static call trampoline
x86/retpoline: Add ANNOTATE_NOENDBR for retpolines
x86/uaccess: Add ENDBR to __put_user_nocheck*()
x86/xen: Add ANNOTATE_NOENDBR to startup_xen()
objtool: Print data address for "!ENDBR" data warnings
objtool: Use offstr() to print address of missing ENDBR
libsubcmd: Fix OPTION_GROUP sorting
objtool: Reorganize cmdline options
objtool: Ditch subcommands
objtool: Don't print parentheses in function addresses
objtool: Add option to print section addresses
objtool: Make stack validation optional
objtool: Rework ibt and extricate from stack validation
objtool: Extricate sls from stack validation
objtool: Add CONFIG_OBJTOOL
objtool: Make stack validation frame-pointer-specific
objtool: Make static call annotation optional
objtool: Make jump label hack optional
objtool: Make noinstr hacks optional
objtool: Rename "VMLINUX_VALIDATION" -> "NOINSTR_VALIDATION"
objtool: Add HAVE_NOINSTR_VALIDATION
objtool: Remove --lto and --vmlinux in favor of --link
objtool: Update documentation
scripts: Create objdump-func helper script
scripts/faddr2line: Fix overlapping text section failures
Mikulas Patocka (1):
objtool: Fix objtool regression on x32 systems
Nur Hussein (1):
x86/Kconfig: fix the spelling of 'becoming' in X86_KERNEL_IBT config
Peter Zijlstra (5):
lib/strn*,objtool: Enforce user_access_begin() rules
x86,xen,objtool: Add UNWIND hint
x86,objtool: Mark cpu_startup_entry() __noreturn
x86,objtool: Explicitly mark idtentry_body()s tail REACHABLE
objtool: Fix symbol creation
Tiezhu Yang (2):
objtool: Remove inat-tables.c when make clean
objtool: Remove libsubcmd.a when make clean
Tony Luck (1):
x86/cpu: Add new Alderlake and Raptorlake CPU model numbers
MAINTAINERS | 9 +
Makefile | 2 +-
arch/Kconfig | 18 +-
arch/x86/Kconfig | 23 +-
arch/x86/Kconfig.debug | 2 +-
arch/x86/entry/entry_64.S | 3 +
arch/x86/include/asm/intel-family.h | 3 +
arch/x86/include/asm/jump_label.h | 6 +-
arch/x86/include/asm/microcode.h | 2 +
arch/x86/include/asm/static_call.h | 1 +
arch/x86/kernel/alternative.c | 6 +-
arch/x86/kernel/cpu/microcode/core.c | 6 +-
arch/x86/kernel/unwind_orc.c | 8 +-
arch/x86/lib/putuser.S | 4 +
arch/x86/lib/retpoline.S | 2 +-
arch/x86/platform/pvh/head.S | 1 +
arch/x86/power/cpu.c | 10 +-
arch/x86/xen/xen-head.S | 1 +
include/linux/compiler.h | 6 +-
include/linux/cpu.h | 2 +-
include/linux/instrumentation.h | 6 +-
include/linux/objtool.h | 6 +-
kernel/trace/Kconfig | 1 +
lib/Kconfig.debug | 22 +-
lib/Kconfig.kcsan | 4 +-
lib/Kconfig.ubsan | 2 +-
lib/strncpy_from_user.c | 2 +-
lib/strnlen_user.c | 2 +-
scripts/Makefile.build | 23 +-
scripts/faddr2line | 150 ++++---
scripts/link-vmlinux.sh | 66 +--
scripts/objdump-func | 29 ++
scripts/package/builddeb | 2 +-
tools/include/linux/objtool.h | 6 +-
tools/lib/subcmd/parse-options.c | 17 +-
tools/objtool/Build | 12 +-
.../{stack-validation.txt => objtool.txt} | 122 +++++-
tools/objtool/Makefile | 10 +-
tools/objtool/arch/x86/decode.c | 2 +-
tools/objtool/arch/x86/special.c | 2 +-
tools/objtool/builtin-check.c | 156 +++++--
tools/objtool/builtin-orc.c | 73 ----
tools/objtool/check.c | 466 +++++++++++----------
tools/objtool/elf.c | 211 ++++++----
tools/objtool/include/objtool/builtin.h | 34 +-
tools/objtool/include/objtool/elf.h | 16 +-
tools/objtool/include/objtool/warn.h | 35 +-
tools/objtool/objtool.c | 103 +----
tools/objtool/weak.c | 9 +-
49 files changed, 1004 insertions(+), 700 deletions(-)
create mode 100755 scripts/objdump-func
rename tools/objtool/Documentation/{stack-validation.txt => objtool.txt} (80%)
delete mode 100644 tools/objtool/builtin-orc.c
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