linux-kernel - Re: [PATCH 06/13] arc: define syscall_get

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Message-ID: <f5858051-57fa-dc3f-158a-6afe7fc04ca4@synopsys.com>
Date:   Fri, 9 Nov 2018 11:13:33 -0800
From:   Vineet Gupta <vineet.gupta1@...opsys.com>
To:     Andy Lutomirski <luto@...capital.net>
CC:     "Dmitry V. Levin" <ldv@...linux.org>,
        Andy Lutomirski <luto@...nel.org>,
        Paul Moore <paul@...l-moore.com>,
        Eric Paris <eparis@...hat.com>,
        "Elvira Khabirova" <lineprinter@...linux.org>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>,
        "linux-audit@...hat.com" <linux-audit@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/13] arc: define syscall_get_arch()

On 11/9/18 11:03 AM, Andy Lutomirski wrote:
>> Does ptrace (or user of this API) need a unique value per arch. Otherwise instead
>> of adding the boilerplate code to all arches, they could simply define AUDIT_ARCH
>> and common code could return it. Also the EM_xxx are not there in
>> include/uapi/linux/elf.h to begin with since libc elf.h already defines them.
>>
> A lot of architectures allow multiple audit_arches at runtime due to compat support and similar features, so it really does want to be a function.  The goal of this patch set is to get it supported everywhere.
> 

I was wondering if we could have a common syscall_get_arch() simply returning an
per-arch AUDIT_ARCH. But seems like the function itself needs to be per arch
anyways due to the nuances above.