lkml.org 
[lkml]   [2019]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v6 07/13] arm64: add basic pointer authentication support
From
Date
On 03/01/2019 20:29, Pavel Machek wrote:
> On Fri 2018-12-07 18:39:25, Kristina Martsenko wrote:
>> From: Mark Rutland <mark.rutland@arm.com>
>>
>> This patch adds basic support for pointer authentication,
>> allowing userspace to make use of APIAKey, APIBKey, APDAKey,
>> APDBKey, and APGAKey. The kernel maintains key values for each
>> process (shared by all threads within), which are initialised to
>> random values at exec()
> time.
>
> ...
>
>> +/* + * We give each process its own keys, which are shared by
>> all threads. The keys + * are inherited upon fork(), and
>> reinitialised upon exec*(). + */ +struct ptrauth_keys { + struct
>> ptrauth_key apia; + struct ptrauth_key apib; + struct ptrauth_key
>> apda; + struct ptrauth_key apdb; + struct ptrauth_key apga; +};
>
> intstruction_a, data_a, generic_a? Should be easier to understand
> than "apdb" ...

... until you realize that these names do match the documentation,
which makes it even easier to understand how the code uses the
architecture.

M.
--
Jazz is not dead. It just smells funny...

\
 
 \ /
  Last update: 2019-01-04 10:22    [W:0.117 / U:2.892 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site