File name convention ARCH-OSABI-tdep.c

[Yao Qi <qiyaoltc@gmail.com>]

Hi,
I want to extend the *-tdep.c file name convention.  The current
convention is ARCH-OSABI-tdep.c, and I want to extend it to
ARCH-OSABI-tdep-FUNC.c, in which FUNC is about a certain functionality
or feature about this target.

The sparc64 adi patch
(https://sourceware.org/ml/gdb-patches/2017-06/msg00472.html) adds a new
file sparc64-adi-tdep.c which should be merged to sparc64-tdep.c
according to the current naming convention.  However, I think it is good
to put different things in different files.  So with the new convention
proposed here, the new file can be sparc64-tdep-adi.c.

Secondly, some *-tdep.c files are already quite large, arm-tdep.c is of
399434 bytes, 13318 lines.  It is the 5th largest file.  arm-tdep.c
includes many things which are not related to each, like displaced
stepping and process record.  I am thinking that we should allow people
moving them out of *-tdep.c to *-tdep-displaced.c and *-tdep-precord.c.

-- 
Yao (齐尧)