From: Sami Tolvanen <samitolvanen@google.com>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Andi Kleen <ak@linux.intel.com>,
Kees Cook <keescook@chromium.org>,
linux-kbuild@vger.kernel.org,
Nick Desaulniers <ndesaulniers@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Greg Hackmann <ghackmann@google.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Michal Marek <michal.lkml@markovi.net>,
Yury Norov <ynorov@caviumnetworks.com>,
Alex Matveev <alxmtvv@gmail.com>,
Matthias Kaehlcke <mka@chromium.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>
Subject: Re: [PATCH v2 08/18] arm64: don't disable ADR_PREL_PG_HI21* with ARM64_ERRATUM_843419
Date: Thu, 16 Nov 2017 15:09:39 -0800 [thread overview]
Message-ID: <20171116230939.GA38360@samitolvanen.mtv.corp.google.com> (raw)
In-Reply-To: <CAKv+Gu_3R4SUC2hCUtEX_4ut9admtrBZS-S-mzQnQsoJoHPcBw@mail.gmail.com>
On Thu, Nov 16, 2017 at 10:14:17PM +0000, Ard Biesheuvel wrote:
> OK, so my concern here is that this code probably only operates on
> fully linked binaries, and not partially linked object files like
> kernel modules.
Right. That makes sense.
> What is preventing us from using the large model with clang?
We pass -mcmodel=large to clang, but I just confirmed that the
attribute isn't stored in LLVM IR, which means it's not used during
link time compilation. I'll see if we can solve this problem by
passing the correct code model directly to LLVMgold instead. Thanks
for pointing this out.
Sami
next prev parent reply other threads:[~2017-11-16 23:09 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 21:34 [PATCH v2 00/18] Add support for clang LTO Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 01/18] kbuild: add ld-name macro and support for GNU gold Sami Tolvanen
2017-11-15 21:53 ` Kees Cook
2017-11-15 21:34 ` [PATCH v2 02/18] kbuild: fix LD_DEAD_CODE_DATA_ELIMINATION with " Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 03/18] kbuild: move gcc-version.sh to cc-version.sh and add clang support Sami Tolvanen
2017-11-15 21:48 ` Kees Cook
2017-11-15 22:06 ` Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 04/18] arm64: use -mno-implicit-float instead of -mgeneral-regs-only Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 05/18] arm64: fix -m for GNU gold Sami Tolvanen
2017-11-16 10:55 ` Yury Norov
2017-11-16 16:55 ` Nick Desaulniers
2017-11-15 21:34 ` [PATCH v2 06/18] arm64: kvm: use -fno-jump-tables with clang Sami Tolvanen
2017-11-16 11:46 ` Will Deacon
2017-11-16 16:25 ` Sami Tolvanen
2017-11-20 14:41 ` Mark Rutland
2017-11-20 14:43 ` Mark Rutland
2017-11-20 14:47 ` Ard Biesheuvel
2017-11-15 21:34 ` [PATCH v2 07/18] arm64: keep .altinstructions and .altinstr_replacement Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 08/18] arm64: don't disable ADR_PREL_PG_HI21* with ARM64_ERRATUM_843419 Sami Tolvanen
2017-11-15 22:29 ` Ard Biesheuvel
2017-11-16 11:44 ` Will Deacon
2017-11-16 16:32 ` Sami Tolvanen
2017-11-16 16:34 ` Ard Biesheuvel
2017-11-16 21:37 ` Sami Tolvanen
2017-11-16 22:14 ` Ard Biesheuvel
2017-11-16 22:25 ` Ard Biesheuvel
2017-11-16 23:09 ` Sami Tolvanen [this message]
2017-11-16 23:20 ` Ard Biesheuvel
2017-11-16 23:50 ` Sami Tolvanen
2017-11-17 9:54 ` Ard Biesheuvel
2017-11-17 18:49 ` Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 09/18] arm64: explicitly pass --no-fix-cortex-a53-843419 to GNU gold Sami Tolvanen
2017-11-16 11:47 ` Will Deacon
2017-11-16 16:35 ` Sami Tolvanen
2017-11-20 14:47 ` Mark Rutland
2017-11-20 20:35 ` Sami Tolvanen
2017-11-21 11:15 ` Mark Rutland
2017-11-15 21:34 ` [PATCH v2 10/18] arm64: add a workaround for GNU gold with ARM64_MODULE_PLTS Sami Tolvanen
2017-11-16 11:50 ` Will Deacon
2017-11-16 16:41 ` Sami Tolvanen
2017-11-16 18:47 ` Will Deacon
2017-11-15 21:34 ` [PATCH v2 11/18] arm64: make mrs_s and msr_s macros work with LTO Sami Tolvanen
2017-11-16 11:54 ` Will Deacon
2017-11-16 13:07 ` Yury Norov
2017-11-16 13:55 ` Robin Murphy
2017-11-16 21:29 ` Yury Norov
2017-11-16 22:54 ` Alex Matveev
2017-12-04 17:34 ` Nick Desaulniers
2017-11-16 13:56 ` Segher Boessenkool
2017-11-16 16:46 ` Sami Tolvanen
2017-11-16 17:01 ` Segher Boessenkool
2017-11-16 17:11 ` Sami Tolvanen
2017-11-16 16:43 ` Sami Tolvanen
2017-11-16 16:44 ` Nick Desaulniers
2017-11-16 18:14 ` Alex Matveev
2017-11-15 21:34 ` [PATCH v2 12/18] kbuild: add support for clang LTO Sami Tolvanen
2017-11-15 22:06 ` Kees Cook
2017-11-18 3:21 ` [v2,12/18] " Nicholas Piggin
2017-11-20 20:21 ` Sami Tolvanen
2017-11-21 1:01 ` Nicholas Piggin
2017-11-29 23:30 ` Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 13/18] kbuild: fix dynamic ftrace with " Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 14/18] scripts/mod: disable LTO for empty.c Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 15/18] efi/libstub: disable LTO Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 16/18] arm64: crypto: disable LTO for aes-ce-cipher.c Sami Tolvanen
2017-11-20 15:20 ` Mark Rutland
2017-11-20 15:25 ` Ard Biesheuvel
2017-11-20 21:01 ` Sami Tolvanen
2017-11-21 11:47 ` Mark Rutland
2017-11-20 20:51 ` Sami Tolvanen
2017-11-20 21:29 ` Alex Matveev
2017-11-20 21:31 ` Ard Biesheuvel
2017-11-20 22:03 ` Alex Matveev
2017-11-15 21:34 ` [PATCH v2 17/18] arm64: disable RANDOMIZE_MODULE_REGION_FULL with LTO_CLANG Sami Tolvanen
2017-11-15 21:34 ` [PATCH v2 18/18] arm64: select ARCH_SUPPORTS_LTO_CLANG Sami Tolvanen
2017-11-16 11:58 ` Will Deacon
2017-11-16 16:17 ` Sami Tolvanen
2017-11-16 16:30 ` Peter Zijlstra
2017-11-16 16:50 ` Nick Desaulniers
2017-11-16 16:59 ` Peter Zijlstra
2017-11-16 17:16 ` Nick Desaulniers
2017-11-16 17:34 ` Peter Zijlstra
2017-11-16 17:48 ` Paul E. McKenney
2017-11-16 18:16 ` Nick Desaulniers
2017-11-16 18:39 ` Paul E. McKenney
2017-11-16 18:45 ` Will Deacon
2017-11-16 19:13 ` Paul E. McKenney
2017-11-16 20:17 ` Sami Tolvanen
2017-11-20 18:05 ` Will Deacon
2017-11-20 19:25 ` Peter Zijlstra
2017-11-20 19:28 ` Peter Zijlstra
2017-11-20 20:52 ` Paul E. McKenney
2017-11-20 19:32 ` Peter Zijlstra
2017-11-20 20:53 ` Paul E. McKenney
2017-11-21 17:23 ` David Laight
2017-11-21 18:51 ` Paul E. McKenney
2017-11-23 13:42 ` Alexander Potapenko
2017-11-24 7:52 ` Dmitry Vyukov
2017-11-16 20:53 ` [PATCH v2 00/18] Add support for clang LTO Yury Norov
2017-11-16 21:38 ` Sami Tolvanen
2017-11-20 15:21 ` Mark Rutland
2017-11-20 21:04 ` Sami Tolvanen
2017-11-21 11:53 ` Mark Rutland
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