[llvm-dev] Linking Linux kernel with LLD

[George Rimar via llvm-dev]

>>>  - D28094 (Implemented support for R_386_PC8/R_386_8 relocations)
>> Do you remember where it was used ?
>
>setup.elf:
>      ld.lld -m elf_i386 -T arch/x86/boot/setup.ld arch/x86/boot/a20.o arch/x86/boot/bioscall.o arch/x86/boot/cmdline.o arch/x86/boot/copy.o arch/x86/boot/cpu.o >arch/x86/boot/cpuflags.o arch/x86/boot/cpucheck.o arch/x86/boot/early_serial_console.o arch/x86/boot/edd.o arch/x86/boot/header.o arch/x86/boot/main.o >arch/x86/boot/mca.o arch/x86/boot/memory.o arch/x86/boot/pm.o arch/x86/boot/pmjump.o arch/x86/boot/printf.o arch/x86/boot/regs.o arch/x86/boot/string.o >arch/x86/boot/tty.o arch/x86/boot/video.o arch/x86/boot/video-mode.o arch/x86/boot/version.o arch/x86/boot/video-vga.o arch/x86/boot/video-vesa.o arch/x86/boot/video->bios.o -o arch/x86/boot/setup.elf
>    ld.lld: error: do not know how to handle relocation 'R_386_PC8' (23)

Thanks, I'll take a look and probably resurrect that abandoned patch then.

>I still didn't do anything with "Setup too big!" problem, just commented out the assert. 

I did not get to that step yet, but just as a guess: you probably can try to add -N option for that place.

>Tried booting the resulting bzImage and vmlinux with qemu. The bzImage only did reboot over and over, but the vmlinux did show an adorable picture (attached).
>

That is interesting information, thanks. 
I am not familar with linux kernel, but testing with qemu helped a lot when we worked on booting freebsd loaders.
I hope to get to that step soon, after finishing with other already known issues.

George.