linux-kernel - Re: [PATCH 7/7] DWARF: add the config option

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Message-ID: <8dbbb971-fc41-fba2-f356-931a7eabe6ef@zytor.com>
Date:   Fri, 19 May 2017 13:59:38 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>, linux-kernel@...r.kernel.org
Cc:     Jiri Slaby <jslaby@...e.cz>,
        Andrew Morton <akpm@...ux-foundation.org>,
        live-patching@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        the arch/x86 maintainers <x86@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 7/7] DWARF: add the config option

On 05/19/17 13:53, Josh Poimboeuf wrote:
> 
> Here's the struct in its current state:
> 
> 	#define UNDWARF_REG_UNDEFINED		0
> 	#define UNDWARF_REG_CFA			1
> 	#define UNDWARF_REG_SP			2
> 	#define UNDWARF_REG_FP			3
> 	#define UNDWARF_REG_SP_INDIRECT		4
> 	#define UNDWARF_REG_FP_INDIRECT		5
> 	#define UNDWARF_REG_R10			6
> 	#define UNDWARF_REG_DI			7
> 	#define UNDWARF_REG_DX			8
> 

Why only those registers?  Also, if you have the option I would really
suggest using the actual x86 register numbers (ax, ex, dx, bx, sp, bp,
si, di, r8-r15 in that order.)

	-hpa