K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2019-11-11T19:06:04.558074Z
K 7
svn:log
V 863
db_nextframe/i386: reduce the number of special frame types

This change removes TRAP_INTERRUPT and TRAP_TIMERINT frame types.

Their names are a bit confusing: trap + interrupt, what is that?
The TRAP_TIMERINT name is too specific -- can it only be used for timer
"trap-interrupts"?  What is so special about them?

My understanding of the code is that INTERRUPT, TRAP_INTERRUPT and
TRAP_TIMERINT differ only in how an offset from callee's frame pointer to a
trap frame on the stack is calculated.  And that depends on a number of
arguments that a special handler passes to a callee (a function with a
normal C calling convention).

So, this change makes that logic explicit and collapses all interrupt frame
types into the INTERRUPT type.

Reviewed by:	markj
Discussed with:	kib, jhb
MFC after:	3 weeks
Differential Revision: https://reviews.freebsd.org/D22303

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