[coyotos-dev] IDL compatibility

[Jonathan S. Shapiro]

On Tue, 2007-06-19 at 12:22 -0400, Jonathan S. Shapiro wrote:
> The runtime cost is largely irrelevant. These are low-frequency results,
> and in practice it is rare for the receiver to attempt to recover from
> more than one or two exception types. Unless the receiver actually
> handles a large number of exception cases explicitly, the marginal
> runtime cost of a 64-bit exception code is essentially zero.

There is a catch. This requires that RC_OK also be extended to 64 bits.
In practice this is not a problem, but in rare cases it will cause reply
spill-over in EROS. Not so much so in Coyotos.