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Alignment in Scatter File

Note: This was originally posted on 1st July 2010 at http://forums.arm.com

Hi,

I am currently working in an ARM RVCT 2.2 compatible environment.
I want to align some execution region to section aligned addresses i.e., 0x100000 aligned boundary.
For Example:
Consider the below:
Section1 0x62450000 0x400
{
abc.o (+RO)
}

Section2 +0
{

}
Suppose abc.o occupies only 0x100, then Section2 will start from 0x62450100.
But i want to Section2 to start only from 0x62500000.
I had tried using .align as follows:
Section2 +0
{
.ALIGN(0x100000)
}
and
Section2 +0
{
. = ALIGN(0x100000)
}
But both these options were compilable but there was no end result.
Can someone give me some suggestions on this?

Thanks!

Nandhini Manoharan over 12 years ago

Note: This was originally posted on 30th July 2010 at http://forums.arm.com

If i add this option, i am getting the below error:

Error: C0000U: Unrecognized option '--no_legacy_align'.

How can i resolve this error?
I am using RVCT 2.2 build 349.
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Nandhini Manoharan over 12 years ago

Note: This was originally posted on 2nd August 2010 at http://forums.arm.com

I am getting similar error for this option too..
[Error: C0000U: Unrecognized option '--no_legacyalign'.
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Peter Harris over 12 years ago

Note: This was originally posted on 31st July 2010 at http://forums.arm.com

Error: C0000U: Unrecognized option '--no_legacy_align'.

Try --no_legacyalign

Searching the manuals is your friend (See [url="http://infocenter.arm.com"]http://infocenter.arm.com[/url] for electronic copies)/

Iso
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Peter Harris over 12 years ago

Note: This was originally posted on 1st July 2010 at http://forums.arm.com

You have to distinguish between load alignment when executing and store alignment in the binary - by default the system assumes that there is a scatter-loader run before the program runs, so the linker will output sections in a packed form.

This isn't always true - so specify the --no_legacy_align option to force binary alignment - at the expense of larger rom size because you get padding between sections. Do you have a scatter loader?
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Abhinav Varma over 12 years ago

Note: This was originally posted on 8th September 2010 at http://forums.arm.com

hey iso,

I have a linker (LD) script and need to convert that to a scatter file. I need to enforce align 2 for a section. How can I do that in a scatter file. The current alignment shows 4 bytes alignment.

I am using RVDS 4.0 for Cortex M3 on a Win XP system with cygwin environment.

Thanks and Regards
Abhinav Varma
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