GDB_REG_SP
case GDB_REG_SP:
case GDB_REG_SP: return (&kdb_frame->tf_sp);
case GDB_REG_SP: return (&kdb_thrctx->pcb_sp);
case GDB_REG_SP: kdb_frame->tf_sp = regval; break;
case GDB_REG_SP: kdb_thrctx->pcb_sp = regval; break;
case GDB_REG_SP: kdb_thrctx->pcb_sp = regval; break;
case GDB_REG_SP: return (&kdb_thrctx->pcb_sp);
case GDB_REG_SP: kdb_frame->tf_sp = regval; break;