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From: Xianzheng Zhou <joe@lgsolutions.com.au>
Newsgroups: comp.lang.ada
Subject: Re: Help writing ada booting kernel
Date: Mon, 16 Jul 2007 21:01:40 +1000
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Date: 2007-07-16T21:01:40+10:00
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hi Wiktor,
Thanks for your explanation:)
I was actually trying to write a kernel like this(not grub, I used grub 
as an example since I need to figure out how to do standalone booting 
program). This is a good example exactly what I was looking for.

Joe

Wiktor Moskwa wrote:
> On 16.07.2007, Xianzheng Zhou <joe@lgsolutions.com.au> wrote:
>> In the example, int.S and boot.S are in assembly code. Is there a way to 
>> write this part in Ada?
>>
> 
> In boot.S you need a way to pass values of two registers (EAX and EBX)
> to the main procedure through stack - that's where Ada expects parameters.
> The code in int.S can't be put in procedures because interrupt handlers
> don't behave like procedures (stack frame has different format).
> 
> If a compiler supported "bare x86" target it wouldn't probably be
> a problem. For example if you compile something for AVR microcontroler
> using AVR-GCC, interrupt handlers are ordinary blocks of code wrapped
> in special macros - all necessary assembly code is generated by the
> compiler.
>