K 10
svn:author
V 6
jkoshy
K 8
svn:date
V 27
2008-09-15T06:47:52.071616Z
K 7
svn:log
V 542
Correct a callchain capture bug on the i386.

On the i386 architecture, the processor only saves the current value
of `%esp' on stack if a privilege switch is necessary when entering
the interrupt handler.   Thus, `frame->tf_esp' is only valid for
an entry from user mode.  For interrupts taken in kernel mode, we
need to determine the top-of-stack for the interrupted kernel
procedure by adding the appropriate offset to the current frame
pointer.

Reported by:	kris, Fabien Thomas
Tested by:	Fabien Thomas <fabien.thomas at netasq dot com>

END