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From: Tolunay Orkun <listmember@orkun.us>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Why are some global vars part of the image, and some not?
Date: Mon, 06 Nov 2006 14:35:44 -0600	[thread overview]
Message-ID: <454F9CA0.80407@orkun.us> (raw)
In-Reply-To: <454F9123.4050706@freescale.com>

Scott Wood wrote:

> The BSS is purely an optimization; besides increasing flash footprint 
> somewhat, removing it should not change anything except for code that 
> was already broken.

But that increase in size can be important. Besides after relocation 
from ROM to RAM the area will not be used. I personally would rather not 
increase the size of image to handle a limited number of special cases 
where this initialization is needed prior to relocation to RAM. You can 
handle such special cases by instructing the variable to be placed on 
"data" section (like Timur did). Perhaps a macro could be defined to 
make it more readable and documentation/faq would take care of education.

Tolunay

  parent reply	other threads:[~2006-11-06 20:35 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-03 21:58 [U-Boot-Users] Why are some global vars part of the image, and some not? Timur Tabi
2006-11-03 22:19 ` Timur Tabi
2006-11-03 23:47   ` Wolfgang Denk
2006-11-04  0:09     ` Timur Tabi
2006-11-04  0:33       ` Wolfgang Denk
2006-11-03 23:44 ` Wolfgang Denk
2006-11-04  0:07   ` Timur Tabi
2006-11-04  0:31     ` Wolfgang Denk
2006-11-04  1:38       ` Timur Tabi
2006-11-04  2:04         ` Wolfgang Denk
2006-11-06 17:43           ` Scott Wood
2006-11-06 18:03             ` Jerry Van Baren
2006-11-06 18:08               ` Timur Tabi
2006-11-06 18:48                 ` Jerry Van Baren
2006-11-06 18:56                   ` Scott Wood
2006-11-06 19:06                     ` Jerry Van Baren
2006-11-06 19:46                       ` Scott Wood
2006-11-06 19:54                         ` Timur Tabi
2006-11-06 20:13                         ` Jerry Van Baren
2006-11-06 20:21                           ` Timur Tabi
2006-11-06 20:44                             ` Wolfgang Denk
2006-11-06 20:35                         ` Tolunay Orkun [this message]
2006-11-06 20:29                 ` Wolfgang Denk
2006-11-06 20:26             ` Wolfgang Denk
2006-11-06 20:48               ` Scott Wood
2006-11-06 21:15                 ` Wolfgang Denk

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