linux-kernel - Re: [PATCH 1/5] x86/jump-label: Use best default nops for inital jump label calls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 27 Jan 2012 12:27:05 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jason Baron <jbaron@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: [PATCH 1/5] x86/jump-label: Use best default nops for inital
 jump label calls

On 01/27/2012 12:14 PM, Steven Rostedt wrote:
> 
> #define JUMP_LABEL_NOP_SIZE 5
> 
> -#define JUMP_LABEL_INITIAL_NOP ".byte 0xe9 \n\t .long 0\n\t" 
> +#ifdef CONFIG_X86_64 +# define JUMP_LABEL_INIT_NOP P6_NOP5 +#else 
> +# define JUMP_LABEL_INIT_NOP 0x3e, 0x8d, 0x74, 0x26, 0x00 +#endif
> 

Why not just use ASM_NOP5_ATOMIC since you have configuration
available here?

	-hpa

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/