Cannot boot xv6 after adding some codes to the kernel

Question

I only made a little bit changes to the xv6 kernel to support shared memory. After compiling, I cannot boot it under qemu. It just halts at "booting from the disk...". But I didn't do anything to the bootloader. Can somebody tell me what's wrong,please? xv6 cannot boot

Answer 1

You should be more specific with what changes were made exactly. Please include them here.