[Xen-devel] Hypercalls: ignored output registers?

2015-12-26 Thread Carl Patenaude Poulin
Hi all, I'm looking at how hypercalls are implemented in Mini-OS and Andrew Cooper's xen-test-framework. In both cases, several registers are defined as outputs, they're bound by input registers, and their outputs are ignored. Is there any reason for doing this instead of just declaring directly t

Re: [Xen-devel] Hypercalls: ignored output registers?

2015-12-27 Thread Andrew Cooper
On 27/12/2015 03:42, Carl Patenaude Poulin wrote: Hi all, I'm looking at how hypercalls are implemented in Mini-OS and Andrew Cooper's xen-test-framework. In both cases, several registers are defined as outputs, they're bound by input registers, and their outputs are ignored. Is there any reason