Mon, 11 Oct 2010 04:18:58 -0700
6829194: JSR 292 needs to support compressed oops
Reviewed-by: kvn, jrose
duke@435 | 1 | /* |
trims@1907 | 2 | * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // machine-dependent implemention for register maps |
duke@435 | 26 | friend class frame; |
duke@435 | 27 | |
duke@435 | 28 | private: |
duke@435 | 29 | intptr_t* _window; // register window save area (for L and I regs) |
duke@435 | 30 | intptr_t* _younger_window; // previous save area (for O regs, if needed) |
duke@435 | 31 | |
duke@435 | 32 | address pd_location(VMReg reg) const; |
duke@435 | 33 | void pd_clear(); |
duke@435 | 34 | void pd_initialize_from(const RegisterMap* map) { |
duke@435 | 35 | _window = map->_window; |
duke@435 | 36 | _younger_window = map->_younger_window; |
duke@435 | 37 | _location_valid[0] = 0; // avoid the shift_individual_registers game |
duke@435 | 38 | } |
duke@435 | 39 | void pd_initialize() { |
duke@435 | 40 | _window = NULL; |
duke@435 | 41 | _younger_window = NULL; |
duke@435 | 42 | _location_valid[0] = 0; // avoid the shift_individual_registers game |
duke@435 | 43 | } |
duke@435 | 44 | void shift_window(intptr_t* sp, intptr_t* younger_sp) { |
duke@435 | 45 | _window = sp; |
duke@435 | 46 | _younger_window = younger_sp; |
duke@435 | 47 | // Throw away locations for %i, %o, and %l registers: |
duke@435 | 48 | // But do not throw away %g register locs. |
duke@435 | 49 | if (_location_valid[0] != 0) shift_individual_registers(); |
duke@435 | 50 | } |
duke@435 | 51 | void shift_individual_registers(); |
duke@435 | 52 | // When popping out of compiled frames, we make all IRegs disappear. |
duke@435 | 53 | void make_integer_regs_unsaved() { _location_valid[0] = 0; } |