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Hi Experts, I was reading Bran's Kernel development tool at following link: Bona Fide OS Development Bran's Kernel Development Tutorial I used link.ld start.asm main.c system.h scrn.c file from this ...
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  1. #1
    Just Joined!
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    May 2007
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    Bran's Kernel development tutorial


    Hi Experts,

    I was reading Bran's Kernel development tool at following link: Bona Fide OS Development Bran's Kernel Development Tutorial

    I used link.ld start.asm main.c system.h scrn.c file from this link as it is.

    As per the tutorial, it says add the two function calls(init_video() and puts()) to main function in main.c

    After adding the above two function calls to the main function, I compiled the code with following commands

    nasm -f aout -o start.o start.asm
    gcc -Wall -O -fstrength-reduce -fomit-frame-pointer -finline-functions -nostdinc -fno-builtin -I./include -c -o main.o main.c
    gcc -Wall -O -fstrength-reduce -fomit-frame-pointer -finline-functions -nostdinc -fno-builtin -I./include -c -o scrn.o scrn.c
    ld -T link.ld -o kernel.bin start.o scrn.o

    Compilation and linking went fine, and kernel.bin was generated

    I copied kernel.bin to /boot and edited menu.lst under grub to pick up this kernel as follows.
    title joachim
    root (hd0,6)
    kernel /kernel.bin


    Now, when I rebooted the system and tried to boot with kernel.bin, I got following error:
    Error 13: Invalid or Unsupported executable format

    When I removed the calls to init_video() and puts() from the main() function and used the newly generated kernel.bin, I did not get any error 13 as mentioned above.

    Request you to help in this regard.

    For all the files that are mentioned above are available at :
    Bona Fide OS Development Bran's Kernel Development Tutorial

    Because there is lot of code, I did not paste it here.

    Thanks and Regards,
    Paresh

  2. #2
    Just Joined!
    Join Date
    Jan 2008
    Posts
    1
    Using the ld script from here:
    http://www.jamesmolloy.co.uk/tutoria...7;20setup.html
    ...worked.
    -Ralph

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