Resolves #88.
reg_t s = STATE.mstatus;
reg_t prev_prv = get_field(s, MSTATUS_MPP);
s = set_field(s, MSTATUS_UIE << prev_prv, get_field(s, MSTATUS_MPIE));
-s = set_field(s, MSTATUS_MPIE, 0);
+s = set_field(s, MSTATUS_MPIE, 1);
s = set_field(s, MSTATUS_MPP, PRV_U);
p->set_privilege(prev_prv);
p->set_csr(CSR_MSTATUS, s);
reg_t s = STATE.mstatus;
reg_t prev_prv = get_field(s, MSTATUS_SPP);
s = set_field(s, MSTATUS_UIE << prev_prv, get_field(s, MSTATUS_SPIE));
-s = set_field(s, MSTATUS_SPIE, 0);
+s = set_field(s, MSTATUS_SPIE, 1);
s = set_field(s, MSTATUS_SPP, PRV_U);
p->set_privilege(prev_prv);
p->set_csr(CSR_MSTATUS, s);