Hello experts, I am faced with a problem on my experiment. (arm64) When the linux kernel boots and after it jumped to /bin/sh in the initramfs (by busybox), it hangs after the program jumps the schedule() function. I can see it comes out of schedule() function using printk, but I don't know where it had gone(or returned). I tried printing the bottom two values in the schedule() function, because the x29(=fp) and x30(=lr) is stored at the stack bottom during any function. But the lr value is somewhere in then init stack(by examining the System.map). So I guessed that lr value, a virtual address is a user virtual address.. Is my guess correct or should the lr value point to a point in kernel text section? Actually I don't know exactly how a user program is interrupted by the schedule function initiated by the timer interrupt so I would be grateful if someone explain it. ( I tried reading part of a book or web posts but didn't get what I want yet). Thank you! Regards, Chan Kim _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
