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From: Josh Poimboeuf <jpoimboe@redhat.com>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	Sami Tolvanen <samitolvanen@google.com>,
	Sedat Dilek <sedat.dilek@gmail.com>,
	Kees Cook <keescook@chromium.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	clang-built-linux@googlegroups.com,
	Miroslav Benes <mbenes@suse.cz>
Subject: [PATCH v2 00/20] objtool: vmlinux.o and CLANG LTO support
Date: Thu, 21 Jan 2021 15:29:16 -0600	[thread overview]
Message-ID: <cover.1611263461.git.jpoimboe@redhat.com> (raw)

v2:
- fix commit description for why xen hypervisor page contents don't
  matter [Juergen]
- annotate indirect jumps as safe instead of converting them to
  retpolines [Andrew, Juergen]
- drop patch 1 - fake jumps no longer exist
- add acks

Based on tip/objtool/core.


Add support for proper vmlinux.o validation, which will be needed for
Sami's upcoming x86 LTO set.  (And vmlinux validation is the future for
objtool anyway, for other reasons.)

This isn't 100% done -- most notably, crypto still needs to be supported
-- but I think this gets us most of the way there.

This can also be found at

  git://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git objtool-vmlinux

And for more testing it can be combined with Sami's x86 LTO patches:

  https://github.com/samitolvanen/linux clang-lto


Josh Poimboeuf (20):
  objtool: Fix error handling for STD/CLD warnings
  objtool: Fix retpoline detection in asm code
  objtool: Fix ".cold" section suffix check for newer versions of GCC
  objtool: Support retpoline jump detection for vmlinux.o
  x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub
  objtool: Assume only ELF functions do sibling calls
  objtool: Add asm version of STACK_FRAME_NON_STANDARD
  objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC
  objtool: Add xen_start_kernel() to noreturn list
  objtool: Move unsuffixed symbol conversion to a helper function
  objtool: Add CONFIG_CFI_CLANG support
  x86/xen: Support objtool validation in xen-asm.S
  x86/xen: Support objtool vmlinux.o validation in xen-head.S
  x86/xen/pvh: Annotate indirect branch as safe
  x86/ftrace: Support objtool vmlinux.o validation in ftrace_64.S
  x86/acpi: Annotate indirect branch as safe
  x86/acpi: Support objtool validation in wakeup_64.S
  x86/power: Annotate indirect branches as safe
  x86/power: Move restore_registers() to top of the file
  x86/power: Support objtool validation in hibernate_asm_64.S

 arch/x86/include/asm/unwind_hints.h   |  13 +---
 arch/x86/kernel/acpi/Makefile         |   1 -
 arch/x86/kernel/acpi/wakeup_64.S      |   4 +
 arch/x86/kernel/ftrace_64.S           |   8 +-
 arch/x86/lib/retpoline.S              |   2 +-
 arch/x86/platform/pvh/head.S          |   2 +
 arch/x86/power/Makefile               |   1 -
 arch/x86/power/hibernate_asm_64.S     | 103 +++++++++++++-------------
 arch/x86/xen/Makefile                 |   1 -
 arch/x86/xen/xen-asm.S                |  29 +++++---
 arch/x86/xen/xen-head.S               |   5 +-
 include/linux/objtool.h               |  13 +++-
 tools/include/linux/objtool.h         |  13 +++-
 tools/objtool/arch/x86/decode.c       |   4 +-
 tools/objtool/arch/x86/special.c      |   2 +-
 tools/objtool/check.c                 |  89 ++++++++++++----------
 tools/objtool/elf.c                   |  88 ++++++++++++++++------
 tools/objtool/include/objtool/check.h |  12 ++-
 tools/objtool/include/objtool/elf.h   |   2 +-
 19 files changed, 240 insertions(+), 152 deletions(-)

-- 
2.29.2


             reply	other threads:[~2021-01-21 21:32 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-21 21:29 Josh Poimboeuf [this message]
2021-01-21 21:29 ` [PATCH v2 01/20] objtool: Fix error handling for STD/CLD warnings Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 02/20] objtool: Fix retpoline detection in asm code Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 03/20] objtool: Fix ".cold" section suffix check for newer versions of GCC Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 04/20] objtool: Support retpoline jump detection for vmlinux.o Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 05/20] x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 06/20] objtool: Assume only ELF functions do sibling calls Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 07/20] objtool: Add asm version of STACK_FRAME_NON_STANDARD Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 08/20] objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 09/20] objtool: Add xen_start_kernel() to noreturn list Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 10/20] objtool: Move unsuffixed symbol conversion to a helper function Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 11/20] objtool: Add CONFIG_CFI_CLANG support Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 12/20] x86/xen: Support objtool validation in xen-asm.S Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 13/20] x86/xen: Support objtool vmlinux.o validation in xen-head.S Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 14/20] x86/xen/pvh: Annotate indirect branch as safe Josh Poimboeuf
2021-01-22  5:17   ` Jürgen Groß
2021-01-21 21:29 ` [PATCH v2 15/20] x86/ftrace: Support objtool vmlinux.o validation in ftrace_64.S Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 16/20] x86/acpi: Annotate indirect branch as safe Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 17/20] x86/acpi: Support objtool validation in wakeup_64.S Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 18/20] x86/power: Annotate indirect branches as safe Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 19/20] x86/power: Move restore_registers() to top of the file Josh Poimboeuf
2021-01-21 21:29 ` [PATCH v2 20/20] x86/power: Support objtool validation in hibernate_asm_64.S Josh Poimboeuf
2021-01-21 22:38 ` [PATCH v2 00/20] objtool: vmlinux.o and CLANG LTO support Sedat Dilek
2021-01-22 15:41   ` Josh Poimboeuf
2021-01-22 21:17     ` Sami Tolvanen
2021-01-23  1:32       ` Nick Desaulniers
2021-01-23  2:26         ` Josh Poimboeuf
2021-01-23  2:31           ` Sedat Dilek
2021-01-23  2:46             ` Josh Poimboeuf
2021-01-23  2:50               ` Sedat Dilek
2021-01-25 22:43           ` Sami Tolvanen

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