On Sat, 2005-02-26 at 20:28 -0600, Curran, Dominic wrote:
> Hi
>
> Trying to do something very simple and failing miserably...
>
> I want to dump out the amount of stack size I have left at different
> points in my LKM driver.
as a debugging aid I assume
> In order to do this I believe I need to know the value of 'current' and
> 'esp'.
Just copy the following code into yours (your module is gpl so that you
can copy such things I assume):
58 #ifdef CONFIG_DEBUG_STACKOVERFLOW
59 /* Debugging check for stack overflow: is there less than 1KB free? */
60 {
61 long esp;
62
63 __asm__ __volatile__("andl %%esp,%0" :
64 "=r" (esp) : "" (THREAD_SIZE - 1));
65 if (unlikely(esp < (sizeof(struct thread_info) + STACK_WARN))) {
66 printk("do_IRQ: stack overflow: %ld\n",
67 esp - sizeof(struct thread_info));
68 dump_stack();
69 }
70 }
71 #endif
--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive: http://mail.nl.linux.org/kernelnewbies/
FAQ: http://kernelnewbies.org/faq/
