ld: final link failed

[ywx120702@tuta.io]

Hi all:

After upgrade from Fedora 40 to 41, I tried to rebuild my toy kernel, but failed. All I got was "ld: final link failed". I guess normally, there would be some error message like "File truncated" after that.

I narrowed down the problem a little bit

realmode.c

void _start() { __asm__("ljmpl $0x08, $longmode_start"); }

longmode.c

void longmode_start() { }

linker.ld

SECTIONS {
    .text : {
      *(.text);
    }
    /DISCARD/ : {
      *(.eh_frame);
      *(.note*);
    }
}

command line to reproduce the problem

gcc -m16 -ffreestanding -c -o realmode.o realmode.c
objcopy -I elf32-i386 -O elf64-x86-64 realmode.o
gcc -ffreestanding -c -o longmode.o longmode.c
ld --oformat=binary -Tlinker.ld -o kernel.bin realmode.o longmode.o

however, ld won't complain if output format is elf

ld -Tlinker.ld -o kernel.elf realmode.o longmode.o
objcopy -I elf64-x86-64 -O binary kernel.elf kernel.elf.bin

Then I tried in docker a few different distros that comes with ld 2.43. They are all the same.

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