The interface between eCos applications and the "ROM monitor" they are
cooperating with needs to be made cleaner.  Currently, different platforms
and architectures use different CDL to describe this (see PPC and SH for
examples - look for CYGSEM_HAL_USE_ROM_MONITOR).

This CDL needs to be made consistent and more importantly, it needs to
more completely describe the relationship between the monitor environment
and the eCos application.  Appropriate support also needs to be in place
in the generic eCos layers.  An example of where/how this matters can be
found at .../hal/common/hal_misc.c - cyg_hal_user_break().  Currently this
code will only build/work when the debug environment is GDB stubs built
using virtual vector support, but that is not clear at all from either
the code conditialization (#if) or the CDL which is used to enable it.