Re: [Crash-utility] [PATCH] Fix x86 initialization for {hard, soft}irq_ctx

> [BTW, current x86_get_pc() uses inactive_task_frame_ret_addr to get > pc. However, inactive_task_frame is only valid if task is sleeping > state. (running task may overwrite inactive_task_frame already.) I'm > not sure whether we should check is_task_active() or not. Even if > checking is_task_active(), we can't get pc correctly anyway.] Well, x86_get_pc() should only be called in the case of sleeping tasks because each dumpfile type has its own function to try to find the active task registers. For example, on a kdump: cmd_bt() back_trace() get_kdump_regs() get_netdump_regs() get_netdump_regs_x86() get_netdump_regs_x86() *should* find the starting point hooks. If it fails to do so, it will default to machdep->get_stack_frame() and ultimately x86_get_pc(). So if it gets there, the backtrace is pretty much guaranteed to be invalid.