Hi,

I've committed the attached patch which adds 64 bit capability to the 
gprof component.

Internally this was simply done by changing host_int_4 to host_int_8 
where appropriate and writing the correct data size to the output as 
necessary.

In the component interface, the following were added:

cg-caller-hi pin: Driven with the high order 32 bits of the pc, if necessary
cg-callee-hi pin: Driven with the high order 32 bits of the pc, if necessary
pc-size attribute: Specifies the size, in bytes of the pc. Valid values 
are 4 and 8

Normally, an attribute of the target component named by value-attribute 
is polled to obtain the current pc.
If pc-size is 8, then in addition to this attribute, an additional 
attribute suffixed by "-hi" is polled. For example, if the value of 
value-attribute is "current-pc", then the target attribute named 
current-pc-hi will also be polled. If there is no such attribute then a 
value of zero will be assumed.

cg-caller-hi and cg-callee-hi are primed with a value of zero and 
pc-size is primed with a value of 4, so behavior for ports which don't 
use these remains unchanged.

This has been tested on an internal port which required this support.

Dave