linux-kernel - Re: [PATCH 3/3] MIPS: KASLR: Make relocation

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Message-ID: <4c56a146-211d-e2ba-4a77-96680a6d39bc@loongson.cn>
Date:   Thu, 19 Nov 2020 17:31:34 +0800
From:   Jinyang He <hejinyang@...ngson.cn>
To:     Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Huacai Chen <chenhc@...ote.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] MIPS: KASLR: Make relocation_address can be
 configured

Hi,

On 11/19/2020 04:06 PM, Sergei Shtylyov wrote:
> Hello!
>
> On 19.11.2020 5:29, Jinyang He wrote:
>
>> When CONFIG_RANDOMIZE_BASE is not set, determine_relocation_address()
>> always returns a constant. It is not friendly to users if the address
>> cannot be used. Make it can be configured at Kconfig.
>
>    Make it configurable?
Oh, yes. Sorry for the expression.
0xffffffff81000000 cannot be used on Loongson64 if CONFIG_RANDOMIZE_BASE 
is disabled.
It's lower than address of _end. It makes relocation_addr_valid() return 
0 always.

Thanks!
Jinyang

>> Signed-off-by: Jinyang He <hejinyang@...ngson.cn>
> [...]
>
> MBR, Sergei