vdev_ref_status

Return status from the vdev_factory vread and vwrite functions, and with guest_instr_callback_func_t

Synopsis:

#include <qvm/vdev-core.h>

enum vdev_ref_status {
    VRS_NORMAL,
    VRS_NO_ADVANCE,
    VRS_ABORT,
    VRS_BUS_ERROR,
    VRS_CONTINUE,
    VRS_TERMINATE,
    VRS_ERRNO = 0x100
};

Data:

VRS_NORMAL: Normal completion, advance to next instruction.
VRS_NO_ADVANCE: Normal completion, don't advance to next instruction.
VRS_ABORT: Abort the instruction emulation and restart the guest execution. Reserved for internal use.
VRS_BUS_ERROR: The hosting qvm process instance should generate a bus error to the guest.
VRS_CONTINUE: Keep looking for more instruction exit callbacks; you only use this with guest_instr_callback_func_t.
VRS_TERMINATE: Shut down the hosting qvm process instance.
VRS_ERRNO: Attempting to emulate the action requested by the guest generated an error (the errno value is added to this constant).

Library:

Provided by qvm; no external library is required.