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From: wolfram@ikki.informatik.rwth-aachen.de (Wolfram Roesler)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: How store extra data at the end of an executable?
Message-ID: <wolfram.671202115@ikki>
Date: 9 Apr 91 13:01:55 GMT
References: <5796@mcrware.UUCP>
Sender: news@rwthinf.UUCP
Lines: 22

erik@mcrware.UUCP (Erik Johnson) writes:

>Here is what I would like to do.  I would like to append a picture file to the
>end of my executable file.  In this case, the extra data is a picture file that
>is the menu for my program.  Once a program is loaded into memory, is it closed
>and all file offset information lost, or is there a way I can start reading
>data from the file where the program data left off.

Although I havent tried, it should be possible to simply append the picure
data to the end of the file without disturbing the program. The location of
the picture can be located by looking at the program header, or by simply
loading the last 32K or whatever.
After program load, the entire program file should be in memory and should
remain there during program execution (I dont know what will happen to
relocation info, though, but I cant imagine it will be freed). Look at the program's
basepage, and you will find some pointers to the text, data and bss segments of
the program plus the lengths of these segments. The picture data should be
just behind.
for more info, consult the documentation of the basepage structure.

Good luck
Okami-san