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From: "H. Peter Anvin" <hpa@zytor.com>
To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: tglx@linutronix.de, mingo@redhat.com,
	linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH] x86: pad assembly functions with INT3
Date: Wed, 9 May 2018 12:28:56 -0700	[thread overview]
Message-ID: <5682ec5f-5d95-4028-ecc5-99f92bcadd14@zytor.com> (raw)
In-Reply-To: <20180509165517.GD16034@avx2>

On 05/09/18 09:55, Alexey Dobriyan wrote:
> On Mon, May 07, 2018 at 02:41:14PM -0700, hpa@zytor.com wrote:
>>> -#define __ALIGN		.p2align 4, 0x90
>>> +#define __ALIGN		.p2align 4, 0xCC
>>
>> Acked-by: H. Peter Anvin <h.peter.anvin@in tel.com>
> 
> Thanks!
> 
> If someone knows how to control _compiler_ inter-function padding,
> please tell.
> 

I think I have a gcc feature enhancement request for that. It can't be
done without gcc's knowledge of when a fallthrough is happening (I
presume you took that into account in your patch set.)

	-hpa

  reply	other threads:[~2018-05-09 19:29 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-07 21:37 Alexey Dobriyan
2018-05-07 21:41 ` hpa
2018-05-09 16:55   ` Alexey Dobriyan
2018-05-09 19:28     ` H. Peter Anvin [this message]
2018-05-10 16:39 ` David Laight
2018-05-11 18:53   ` H. Peter Anvin
2018-05-14  9:04     ` David Laight
2018-05-14 11:05       ` hpa
2018-05-15  6:54         ` Ingo Molnar
2018-05-15  6:59           ` hpa
2018-05-14 12:53 ` [tip:x86/pti] x86/asm: Pad assembly functions with INT3 instructions tip-bot for Alexey Dobriyan
2018-06-17 11:40   ` Mike Galbraith
2018-06-17 12:00     ` Borislav Petkov
2018-06-17 13:38       ` Mike Galbraith
2018-06-17 14:02         ` Mike Galbraith
2018-06-17 19:47           ` Borislav Petkov
2018-06-18  2:34             ` Mike Galbraith
2018-06-23 10:36               ` [PATCH] x86/crypto: Add missing RETs Borislav Petkov
2018-06-23 17:30                 ` Ondrej Mosnáček
2018-06-24  7:11                 ` Ingo Molnar
2018-06-24  7:12                   ` Thomas Gleixner
2018-06-24 10:15                     ` Borislav Petkov
2018-06-24 10:44                   ` Alexey Dobriyan
2018-06-25  7:24                     ` Ingo Molnar
2018-06-25 13:19                       ` Josh Poimboeuf
2018-06-26  6:49                         ` Ingo Molnar
2018-06-26 12:31                           ` Josh Poimboeuf
2018-07-05  7:58                             ` Ingo Molnar
2018-07-06 14:06                               ` Josh Poimboeuf
2018-07-06 14:57                                 ` Ingo Molnar
2018-07-01 13:19                 ` Herbert Xu
2018-07-01 15:24                   ` Ondrej Mosnáček
2018-07-01 15:45                     ` Herbert Xu
2018-06-19 11:27         ` [tip:x86/pti] x86/asm: Pad assembly functions with INT3 instructions David Laight

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