[Bug 1001524] New: Cortex-M: Remote 'g' packet reply is too long

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           Summary: Cortex-M: Remote 'g' packet reply is too long
           Product: eCos
           Version: CVS
          Platform: All
        OS/Version: Cortex-M
            Status: NEW
          Severity: enhancement
          Priority: normal
         Component: GDB stubs
        AssignedTo: unassigned@bugs.ecos.sourceware.org
        ReportedBy: john@dallaway.org.uk
                CC: ecos-bugs@ecos.sourceware.org
             Class: Advice Request


When connecting to the Cortex-M GDB stub from recent versions of GDB, an error
is observed:

> (gdb) tar rem /dev/ttyS0
> Remote debugging using /dev/ttyS0
> Remote 'g' packet reply is too long: e14e000810000000000000001000000000000000000000000000000000000000000000000000000000000000fccf0d6800000000e8cf0d6895680008e24e00080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000021
> (gdb)

This occurs because the default register set for ARM M-profile targets has been
reduced (FPA registers have been removed) in recent GDB.

We should add a CDL option to the Cortex-M architectural HAL which allows the
stub to return the register set with or without the FPA registers.

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