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| Can't boot .bin https://forum.osdev.org/viewtopic.php?f=1&t=32596 |
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| Author: | exoticscarf [ Sat Nov 25, 2017 2:34 pm ] |
| Post subject: | Can't boot .bin |
I am attempting to run the file os-image.bin in bochs and im getting the error "FATAL: No bootable device." my bochsrc.bxrc is this: floppya: 1_44=os-image.bin, status=inserted boot: a and the .bin is in bochs' directory, i think the issue may be to do with the way i created the binary the command i used was: "ar cru ps-image.bin kernel.bin boot_sect.bin" but i have no idea how else i could create the .bin. "kernel.bin" was created by "ar cru kernel.bin kernel.o kernel_entry.o" and boot_sect.bin was created by "nasm boot_sect.asm -f -bin -o boot_sect.bin" or is there a way i could convert this non-bootable .bin into a bootable .bin without it affecting the source code? |
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| Author: | Octocontrabass [ Sat Nov 25, 2017 4:18 pm ] |
| Post subject: | Re: Can't boot .bin |
If all you have is ar, everything looks like a static library. Why are you using ar? |
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| Author: | MichaelPetch [ Sat Nov 25, 2017 6:35 pm ] |
| Post subject: | Re: Can't boot .bin |
Poor man's way would be to do something like this: Code: ld -nostdlib -melf_i386 -Ttext=0x######## kernel_entry.o kernel.o -o kernel.elf -Ttext=0x######## needs to changed to the virtual memory address (origin point) where the kernel will be loaded in memory. Don't use ar.objcopy -O binary kernel.elf kernel.bin cat boot_sect.bin kernel.bin >os-image.bin This assumes you aren't on Windows using Cygwin or MinGW linkers and compilers. As per usual I recommend using cross compilers. |
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