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Date: Tue, 24 May 2022 07:34:42 +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: Re: [GIT PULL] objtool changes for v5.19
* Ingo Molnar <mingo@...nel.org> wrote:
> 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
Not sure what happened there, a previous x86/urgent got mixed into the
shortlog & diffstat - this is the correct shortlog & diffstat you should
get when pulling objtool-core-2022-05-23:
Josh Poimboeuf (19):
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
Peter Zijlstra (2):
Merge branch 'tip/x86/urgent'
objtool: Fix symbol creation
Tiezhu Yang (2):
objtool: Remove inat-tables.c when make clean
objtool: Remove libsubcmd.a when make clean
================>
Makefile | 2 +-
arch/Kconfig | 18 ++++++-
arch/x86/Kconfig | 21 +++++---
arch/x86/Kconfig.debug | 2 +-
arch/x86/include/asm/jump_label.h | 6 +--
arch/x86/kernel/alternative.c | 6 +--
include/linux/compiler.h | 6 +--
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 +-
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 ++---
tools/objtool/Documentation/{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 | 463 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------------------------------------------------------------------------
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 +---
34 files changed, 959 insertions(+), 684 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
Thanks,
Ingo
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