Messages in this thread |  | | Date | Thu, 11 Oct 2001 00:41:43 +0300 | From | Baurjan Ismagulov <> | Subject | window_ret_fault on SPARC |
| |
Hi,
my kernel gets into window_ret_fault while returning from trap to user mode.
In the trap return code, SRMMU sets "Fault Address Valid" during "save; LOAD_WINDOW(sp); restore". After that, SFSR=00000127 and SFAR=efffed18. Loaded %fp value is efffece0, and [efffece0+38] contains efffed50 -- at least, that is what I see in kgdb using "p/x *(struct reg_window *)0xefffece0". I also tried to see that using printk from window_ret_fault, but the kernel hung solidly (L1-A didn't work).
I followed all vm_next links in current->mm->mmap; efffd000-effff000 area seems to be there. However, I was unable to track it via current->pgd.
So:
1. Why do I get multiple (SFSR.OV=1) faults in srmmu_rett_stackchk?
2. How can I see whether page directories of the current process are set up correctly?
I would be very grateful if someone could help me to solve this problem. I'm using 2.2.19 on sun4m.
Thanks in advance, Baurjan. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |