linux-kernel - Re: [PATCH 23/27] [AARCH64] delouse input arguments in system functions

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Date:	Tue, 21 Jun 2016 10:08:05 +0200
From:	Andreas Schwab <schwab@...e.de>
To:	Yury Norov <ynorov@...iumnetworks.com>
Cc:	<libc-alpha@...rceware.org>, <linux-kernel@...r.kernel.org>,
	<arnd@...db.de>, <catalin.marinas@....com>,
	<marcus.shawcroft@....com>, <philb@....org>, <davem@...emloft.net>,
	<szabolcs.nagy@....com>, <maxim.kuvyrkov@...aro.org>,
	<joseph@...esourcery.com>, <pinskia@...il.com>
Subject: Re: [PATCH 23/27] [AARCH64] delouse input arguments in system functions

Yury Norov <ynorov@...iumnetworks.com> writes:

> diff --git a/sysdeps/aarch64/dl-tlsdesc.S b/sysdeps/aarch64/dl-tlsdesc.S
> index fe8a17d..718dddf 100644
> --- a/sysdeps/aarch64/dl-tlsdesc.S
> +++ b/sysdeps/aarch64/dl-tlsdesc.S
> @@ -74,6 +74,7 @@
>  	cfi_startproc
>  	.align 2
>  _dl_tlsdesc_return:
> +	DELOUSE(0)
>  	ldr	PTR_REG (0), [x0, #PTR_SIZE]
>  	RET
>  	cfi_endproc
> @@ -126,6 +127,7 @@ _dl_tlsdesc_undefweak:
>  	   td->entry in _dl_tlsdesc_resolve_rela_fixup ensuring that the load
>  	   from [x0,#8] here happens after the initialization of td->arg.  */
>  	ldar	xzr, [x0]
> +	DELOUSE(0)

That needs to be moved before the previous insn, doesn't it?  Also,
again _dl_tlsdesc_return_lazy is missing.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
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