hi There

I need some help.I have this structure



But this allocates 819 kilo bytes and also makes my file grow larger by this size.
How do i allocate memory and set a pointer to use MagicArray.Index for example without having my file grow larger?

i do know about posix_memalign() but i do not understand how i will use that for example to point to this array.As soon as i put the code "My MagicArray" my filesize grows,and without this,how would i access my structure like i used to by my.Index for example?

Any help would be appreciated.Thanks

See this recent topic for an explanation:
http://board.flatassembler.net/topic.php?t=17260

Moved to Main

Thanks for the reply.I still do not understand how to apply this to the struc MagicArray.

Where do i place the dq instead of the rq so that it doesn't get added to the file.
I tried several combinations,shifting the struc,etc etc without any luck

You need to place the line "My MagicArray" at the end of a section.

The structure definition can be placed anywhere as long as it is before you instantiate it with "My MagicArray".

Thanks!

it is not really good to instanciate large memory blocks in source code. better to use any malloc function to do the job, don't forget to free the memory at the end...

what do you think about that revolution?

edfed: Like everything else it depends upon what you are doing. In general I would say that is reasonable advice for anything that one intends to use for a serious application. For quick-and-dirty though I guess it makes little difference, just don't tell anyone what you did and it will be fine.

To allocate an array: ... where Array.Scale is the index/element size. Index would be: [S*I+Array.P] (SIB) or [Array.P+I*S] or Array.P[S*I] (all same, * is evaluated first). An easy way to remember is the word "PINS": Pointer, Index, Number, Scale:

* Array.P: Pointer, base address
* Array.I: Index
* Array.N: # indices
* Array.S: Index scale/size

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