linux-kernel - Re: [uClinux-dev] [PATCH/RFC] FDPIC: add hook for arches to customize program header parsing

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Date:	Mon, 7 Dec 2009 18:17:17 +0800
From:	Jie Zhang <jie.zhang@...log.com>
To:	Mike Frysinger <vapier.adi@...il.com>
CC:	David Howells <dhowells@...hat.com>,
	uClinux development list <uclinux-dev@...inux.org>,
	linux-kernel@...r.kernel.org, Greg Ungerer <gerg@...inux.org>,
	uclinux-dist-devel@...ckfin.uclinux.org,
	David McCullough <davidm@...pgear.com>
Subject: Re: [uClinux-dev] [PATCH/RFC] FDPIC: add hook for arches to customize
 	program header parsing

On 12/07/2009 06:10 PM, Mike Frysinger wrote:
> On Fri, Dec 4, 2009 at 19:28, Jie Zhang<wrote:
>> On 12/05/2009 01:44 AM, David Howells wrote:
>>> Mike Frysinger<vapier@...too.org>    wrote:
>>>> The Blackfin port has custom program header flags/addresses for
>>>> automatically loading regions into the dedicated on-chip SRAM.  So add a
>>>> hook for ports to leverage.
>>>
>>> Now that I've ACK'd this, I feel I'm going to have to NAK it.  I'm not
>>> against
>>> the general concept, but:
>>>
>>>> +               do_munmap(mm, *maddr, phdr->p_memsz + *disp);
>>>
>>> There needs to be a mapping covering the SRAM region for the purposes of
>>> the
>>
>> Our GDB is still lack of the feature to debug applications using SRAM.
>
> semi true.  L1 text appears to work fine:

This is by lucky. We need some feature in GDB 7.0 to cope with code or 
data in L1 SRAM.


Jie
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