From: "H. Peter Anvin" <hpa@linux.intel.com>
To: Yinghai Lu <yinghai@kernel.org>, WANG Chao <chaowang@redhat.com>
Cc: Kees Cook <keescook@chromium.org>,
Zhang Yanfei <zhangyanfei@cn.fujitsu.com>,
Vivek Goyal <vgoyal@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: kaslr relocation incompitable with kernel loaded high
Date: Mon, 21 Apr 2014 10:57:56 -0700 [thread overview]
Message-ID: <53555C24.1070100@linux.intel.com> (raw)
In-Reply-To: <CAE9FiQWf+3hMZbt7Ac+vgL+8kqqQS4LKVGmWgrd5fJ4nkSgmPA@mail.gmail.com>
On 04/21/2014 10:56 AM, Yinghai Lu wrote:
>>
>> 32-bit relocation outside of kernel!
>
> Interesting, when kernel get at "early console in decompress_kernel"
> kernel already in 64 bit...
>
> what does it mean "32-bit relocation outside of kernel" ?
>
> why 32-bit is involved ?
>
Most addresses and immediates on 64 bits are 32 bits wide, which is why
we have the high kernel mapping in the first place.
-hpa
next prev parent reply other threads:[~2014-04-21 17:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-21 10:52 kaslr relocation incompitable with kernel loaded high WANG Chao
2014-04-21 17:56 ` Yinghai Lu
2014-04-21 17:57 ` H. Peter Anvin [this message]
2014-04-21 18:01 ` Kees Cook
2014-04-22 3:16 ` WANG Chao
2014-04-22 4:58 ` Yinghai Lu
2014-04-22 5:28 ` WANG Chao
2014-04-22 18:14 ` Kees Cook
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