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proveren



Joined: 24 Jul 2004
Posts: 68
Location: Bulgaria
proveren
Howcan i statically reserve memory for my program, without this memory be part of the size of my executable?
For example, if i have 5kbytes of code and want to have 10kbytes of data uninitialized, i would not want to have a statement of rb 10*1024 in my data segment, and end up with a 15kb executable. I would like a 5KB executable. In MenuetOS this is possible, when you say the amount of memory you need in the header .
Is such thing possible under Windows?
Post 13 Dec 2004, 19:35
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JohnFound



Joined: 16 Jun 2003
Posts: 3500
Location: Bulgaria
JohnFound
proveren wrote:
Is such thing possible under Windows?


Yes, of course.
1. You have to define those 10kbytes as undefined data, i.e. using rb, rw, rd, etc. or as undefined db, dw, dd directives.
2. All undefined data must be defined at the end of the section, where you want to reside. Every defined data byte after it will add those 10k to the size of the exe.

For easy definition of such data and automatically grouping it in right place and in right order you can use the macro library "globals.inc" from Fresh package.

Regards
Post 13 Dec 2004, 20:25
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proveren



Joined: 24 Jul 2004
Posts: 68
Location: Bulgaria
proveren
OMG, thanks John.
I was wondering about why to use rb, and not db 0, and what the point was of reserve directive at all.
I feel a little bit ashamed now, but many thanks to you.
Keep updating with the Fresh project Wink
Post 13 Dec 2004, 20:42
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