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From: Catalin Marinas <catalin.marinas@arm.com>
To: Amit Kachhap <amit.kachhap@arm.com>
Cc: kbuild-all@lists.01.org, kbuild test robot <lkp@intel.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	daniel.kiss@arm.com,
	Kristina Martsenko <kristina.martsenko@arm.com>,
	Vincenzo Frascino <Vincenzo.Frascino@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Kees Cook <keescook@chromium.org>
Subject: Re: [arm64:for-next/kernel-ptrauth 16/18] aarch64-linux-objdump: warning: fs/squashfs/decompressor_multi.o: unsupported GNU_PROPERTY_TYPE (5) type: 0xc0000000
Date: Tue, 24 Mar 2020 17:00:28 +0000	[thread overview]
Message-ID: <20200324170028.GF3901@mbp> (raw)
In-Reply-To: <bf23b903-28f4-226c-49ce-3f761ae848a7@arm.com>

On Tue, Mar 24, 2020 at 10:02:16PM +0530, Amit Kachhap wrote:
> On 3/24/20 9:45 PM, Catalin Marinas wrote:
> > > On 3/23/20 5:18 PM, Catalin Marinas wrote:
> > > > Just to make sure I understand the cause of this warning: gcc generates
> > > > a .note.gnu.property when PAC is enabled for the kernel but binutils
> > > > doesn't understand it. Is there a way to check for this via the Kconfig
> > > > options?
[...]
> > If there isn't a way to silence the linker or objdump, could we align
> > the compiler version we know that generates this note with a minimum
> > binutils? Something like:
> > 
> > 	depends on (GCC_VERSION < X) || (LD_VERSION >= 233...)
> 
> Yes this is possible.

Note that LD_VERSION does not exist for kconfig. Please put together a
couple of patches here (and include clang versions as well) on top of
the arm64 for-next/kernel-ptrauth branch. They are not critical, we can
merge them after 5.7-rc1.

Thanks.

-- 
Catalin

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: kbuild-all@lists.01.org
Subject: Re: [arm64:for-next/kernel-ptrauth 16/18] aarch64-linux-objdump: warning: fs/squashfs/decompressor_multi.o: unsupported GNU_PROPERTY_TYPE (5) type: 0xc0000000
Date: Tue, 24 Mar 2020 17:00:28 +0000	[thread overview]
Message-ID: <20200324170028.GF3901@mbp> (raw)
In-Reply-To: <bf23b903-28f4-226c-49ce-3f761ae848a7@arm.com>

[-- Attachment #1: Type: text/plain, Size: 970 bytes --]

On Tue, Mar 24, 2020 at 10:02:16PM +0530, Amit Kachhap wrote:
> On 3/24/20 9:45 PM, Catalin Marinas wrote:
> > > On 3/23/20 5:18 PM, Catalin Marinas wrote:
> > > > Just to make sure I understand the cause of this warning: gcc generates
> > > > a .note.gnu.property when PAC is enabled for the kernel but binutils
> > > > doesn't understand it. Is there a way to check for this via the Kconfig
> > > > options?
[...]
> > If there isn't a way to silence the linker or objdump, could we align
> > the compiler version we know that generates this note with a minimum
> > binutils? Something like:
> > 
> > 	depends on (GCC_VERSION < X) || (LD_VERSION >= 233...)
> 
> Yes this is possible.

Note that LD_VERSION does not exist for kconfig. Please put together a
couple of patches here (and include clang versions as well) on top of
the arm64 for-next/kernel-ptrauth branch. They are not critical, we can
merge them after 5.7-rc1.

Thanks.

-- 
Catalin

  reply	other threads:[~2020-03-24 17:00 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-21  4:28 [arm64:for-next/kernel-ptrauth 16/18] aarch64-linux-objdump: warning: fs/squashfs/decompressor_multi.o: unsupported GNU_PROPERTY_TYPE (5) type: 0xc0000000 kbuild test robot
2020-03-21  4:28 ` kbuild test robot
2020-03-23 11:48 ` Catalin Marinas
2020-03-23 11:48   ` Catalin Marinas
2020-03-23 17:04   ` Daniel Kiss
2020-03-23 17:04     ` Daniel Kiss
2020-03-23 17:06   ` Amit Kachhap
2020-03-23 17:06     ` Amit Kachhap
2020-03-24 16:15     ` Catalin Marinas
2020-03-24 16:15       ` Catalin Marinas
2020-03-24 16:32       ` Amit Kachhap
2020-03-24 16:32         ` Amit Kachhap
2020-03-24 17:00         ` Catalin Marinas [this message]
2020-03-24 17:00           ` Catalin Marinas

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