Only if after scanning the text segment this structure can be found by a multiboot bootloader, the bootloader will recognize the binary as a kernel and list it in the list of bootable operating systems for example.ĭo not confuse the Multiboot header structure with the Multiboot Information Data structure.
![how to configure boot.elf file how to configure boot.elf file](https://community.element14.com/resized-image/__size/925x545/__key/communityserver-blogs-components-weblogfiles/00-00-00-02-09/5228.contentimage_5F00_107516.png)
The structure must be contained in the text segment. What does it mean for an operating system to be multiboot compliant? The specification in section “3.1 OS image format” states that the operating system kernel binary must contain a Multiboot header structure in its first 8192 bytes. Any bootloader implementing the Multiboot specification can load any operating system that also adheres to the Multiboot specification. The multiboot specification describes how a bootloader and a kernel can interact with each other. The GRUB bootloader implements the Multiboot specification. Then in the graphical user interface create a virtual machine and configure it to have your iso loaded in the cdrom drive and start it. Then start qemu using the iso file: qemu-system-i386 -m 2G -cdrom image.isoįor VirtualBox, you can install VirtualBox via the Ubuntu activities search box.
![how to configure boot.elf file how to configure boot.elf file](https://i.stack.imgur.com/RLLgE.png)
You can then run that iso image on Ubuntu with either VirtualBox, bochs or qemu.įor qemu, first install qemu: sudo apt-get install qemu You should create a cross compiler for 32 bit x86 code using the System V ABI for the kernel binary to be created correctly.
![how to configure boot.elf file how to configure boot.elf file](https://www.minitool.com/images/uploads/articles/2018/08/boot-configuration-data-missing/boot-configuration-data-missing-2.jpg)
It will run the makefile that creates an iso image.
#How to configure boot.elf file how to
The following article contains a very good explanation about how to create an iso image that contains the GRUB bootloader to load your own kernel which has the elf file format.