Germsoft.com

[Xarnze]

For those of you that are having problems with your kernel suddenly increasing in size and then not being loaded by grub and getting this:

Grub output

Code: Select all

Error 13: Invalid or unsupported executable format

You should first change your nasm arguments to

Code: Select all

nasm -f elf -o

and then replace your linker script with this one as it includes a rodata section that will help to prevent problems like this in the future

Code: Select all

ENTRY(start)
SECTIONS
{
  .text 0x100000 :
  {
    code = .; _code = .; __code = .;
    *(.text)
    . = ALIGN(4096);
  }

  .data :
  {
     data = .; _data = .; __data = .;
     *(.data)
     *(.rodata*)
     . = ALIGN(4096);
  }

  .bss :
  {
    bss = .; _bss = .; __bss = .;
    *(.bss)
    . = ALIGN(4096);
  }

  end = .; _end = .; __end = .;
  . = ALIGN(4096);
}

[crystal]

I got stuck doing "Bran's Kernel Development tutorial" at that point it was just as i had started to add more functionality but i've heard that some people are getting stuck much earlier, anyway the linker script and those arguments work very well I had already changed you kernel to output to elf format using the nasm -f elf -o arguments but I hadn't changed my linker script, so the one above works very well for me.

Thank you