Re: [ECOS] .pool directives and UNMAPPED in ARM

[=?ks_c_5601-1987?B?sejIq7y6?= <hoskim at lanbird dot co dot kr>]

> ??? wrote:
> > 
> > Hi!
> > I have some question about some code in file "vectors.S" used in ARM architecture.
> > 
> > 1. What is the meaning of ".pool" directive?
> 
> Hi ???!
> 
> >From the GNU assembler info file:
> 
> `.ltorg'
>      This directive causes the current contents of the literal pool to
>      be dumped into the current section (which is assumed to be the
>      .text section) at the current location (aligned to a word
>      boundary).
> 
> `.pool'
>      This is a synonym for .ltorg.


Thanks your help!!
But still now I don't understand the meaning exactly.
Can you explain more deeply using examples if possible?

 
> 
> > 2. What is the usage of "UNMAPPED" reset_vector?
> 
> I don't understand the question. If you mean why is it UNMAPPED_PTR rather
> than PTR, then this applies for targets with MMUs in which case the
> unmapped (i.e. unrelocated physical) address of the reset vector is what
> needs to go into the reset vector slot, not the mapped (post relocation
> virtual) address.

Yes, That's my question.
But I am sorry too that I can't understand completely why shoud use UNMAPPED_PTR for reset.
Can you explain using any examples?


> 
> Jifl
> -- 
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