linux-kernel - Re: [PATCH v3 7/7] x86, kaslr, 64bit: Set new or extra ident

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Message-ID: <CAE9FiQWTKcOtSni6Mdv94NhAWUfkYSYeB0eFOft6q4QxV8A9mw@mail.gmail.com>
Date:	Mon, 9 Mar 2015 23:54:54 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	Matt Fleming <matt.fleming@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...e.de>, Baoquan He <bhe@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiri Kosina <jkosina@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>
Subject: Re: [PATCH v3 7/7] x86, kaslr, 64bit: Set new or extra ident_mapping

On Mon, Mar 9, 2015 at 6:14 PM, Yinghai Lu <yinghai@...nel.org> wrote:
>>>
>>> +#include "misc_pgt.c"
>>
>> Shouldn't this just be a normal built .o file that is linked together
>> in the Makefile, specifically tracking CONFIG_RANDOMIZE_BASE as aslr.o
>> already is?
>
> Yes, we could go that way.

Please check attached version with link misc_pgt.o.

BTW, here are difference between include misc_pgt.c and link misc_pgt.o:

include misc_pgt.c
   text       data        bss        dec        hex    filename
13934290        304      50064    13984658     d56392
arch/x86/boot/compressed/vmlinux

link misc_pgt.o
   text       data        bss        dec        hex    filename
13934336        304      50064    13984704     d563c0
arch/x86/boot/compressed/vmlinux

Thanks

Yinghai

View attachment "misc_fill_pgt_v4_2.patch" of type "text/x-patch" (9231 bytes)