[patch] Add support for VFP d16 layout for Cortex-M4

[Tom Tromey]

>>>>> "Jifl" == Jonathan Larmour <jifl@eCosCentric.com> writes:

Jifl> Sorry it's taken me a few days to get back to you, but I've been
Jifl> implementing what's required to send the XML target description
Jifl> support in the eCos stub, so that I could have hard
Jifl> data. Unfortunately it has confirmed my suspicions. Adding code
Jifl> and const data to send back the description for a vanilla Cortex-M
Jifl> profile target has added 1252 bytes to our GDB stub's
Jifl> footprint. If the VFP regs description is added to that, that adds
Jifl> another 931 bytes to give 2183 bytes. That's a big penalty.

Can the XML be compressed?
I don't know.  If not, what if it could be?

I'm curious what you use for your stub.
Based on the recent gdb@ threads, it seems like it can't be gdbserver.

Tom