ld with -Ttext=0x1000 makes the file very big-CodePudding

I have kernel.c file looks like this

void main() {
    char *video_memory = (char *)0xb8000;
    *video_memory = 'X';
}

I compiled and linked with these 2 commands:

gcc -ffreestanding -c ./src/kernel/kernel.c -o kernel.o -m32 -mtune=i386 -fno-pie
ld -o kernel.bin -Ttext=0x1000 kernel.o --oformat binary -m elf_i386 --strip-all -nmagic

It produced a 128MB kernel.bin
However, when I remove -Ttext=0x1000 in ld command, it produced a 120B kernel.bin.

If I understand correctly, -Ttext=0x1000 will add offset 0x1000 to all memory reference. Why did it make such a big difference?

CodePudding user response：

The answer is in the comment of @Peter Cordes and @old_timer.

Building it to elf first and using readelf -a, I found that there is a segment at 0x080480d4 (about 128MB from 0x1000) holding .note.gnu.property.

So I add this linker script to discard .note.gnu.property

/DISCARD/ : {
    *(.note.gnu.property) 
}