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Re: [arm-gnu] Help needed for the ARM Directives 'FIELD' and 'MAP'
- To: Vikash Saraogi <vikas.saraogi@xxxxxxxxxx>
- Subject: Re: [arm-gnu] Help needed for the ARM Directives 'FIELD' and 'MAP'
- From: Carlos O'Donell <carlos@xxxxxxxxxxxxxxxx>
- Date: Mon, 30 Jan 2006 12:18:58 -0500
On Mon, Jan 30, 2006 at 05:01:44PM +0530, Vikash Saraogi wrote:
> I'm using the ADS toolchain for my ARM9E implementation
> and where I've made use of 'FIELD' and 'MAP' directives
> to describe structures.
>
> Can you please let me know the equivalent directives/usage
> if I'm compiling my application using arm-linux-gcc.
>
> Example:
> MAP 0
> pStrtVOLParams: FIELD 2*4
> ubRefBufferIndex: FIELD 2*1
>
Thank you for your interest in our Sourcery G++ Toolchains!
The MAP and FIELD directives are not directly available when using
arm-linux-gcc. The toolchain uses GAS for the assembly phase and
it supports different directives.
Your example would have to use the ".equ" directives in GAS, so it
becomes something like this:
.equiv startstruct1 0
.equiv pStrtVOLParams, startstruct1+0
.equiv ubRefBufferIndex, startstruct1+8
.equiv endstruct1, startstruct1+10
There is no MAP counter, but it could be emulated with a macro.
I recommend you read the definition of the following GAS directives:
= .equ
= .equiv
= .set
= .import / .export
http://www./software/binutils/manual/gas-2.9.1/html_mono/as.html#SEC87
I have not tested the above, but it should work for your purposes.
There is no support for register relative maps, though this should be
possible with macros.
Cheers,
Carlos.
--
Carlos O'Donell
CodeSourcery
carlos@xxxxxxxxxxxxxxxx
(650) 331-3385 x716
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