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

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Message-ID: <14959.1259948697@redhat.com>
Date:	Fri, 04 Dec 2009 17:44:57 +0000
From:	David Howells <dhowells@...hat.com>
To:	uClinux development list <uclinux-dev@...inux.org>
Cc:	dhowells@...hat.com, linux-kernel@...r.kernel.org,
	Jie Zhang <jie.zhang@...log.com>,
	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

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
debugger.  Do you have a chardev covering the SRAM device?  Perhaps through
MTD?

David
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