lkml.org 
[lkml]   [2000]   [Dec]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectWhy is double_fault serviced by a trap gate?


Why is double_fault serviced by a trap gate? The problem with this is that
any double-fault caused by a stack-fault, which is the usual reason,
becomes a triple-fault. And a triple-fault results in a processor reset or
shutdown making the fault damn near impossible to get any information on.

Oughtn't the double-fault exception handler be serviced by a task gate? And
similarly the NMI handler in case the NMI is on the current stack page
frame?




Richard Moore - RAS Project Lead - Linux Technology Centre (PISC).

http://oss.software.ibm.com/developerworks/opensource/linux
Office: (+44) (0)1962-817072, Mobile: (+44) (0)7768-298183
IBM UK Ltd, MP135 Galileo Centre, Hursley Park, Winchester, SO21 2JN, UK


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:51    [W:0.050 / U:14.880 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site