registerMap_sparc.hpp revision 1879:f95d63e2154a 
1/*
2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef CPU_SPARC_VM_REGISTERMAP_SPARC_HPP
26#define CPU_SPARC_VM_REGISTERMAP_SPARC_HPP
27
28// machine-dependent implemention for register maps
29  friend class frame;
30
31 private:
32  intptr_t* _window;         // register window save area (for L and I regs)
33  intptr_t* _younger_window; // previous save area (for O regs, if needed)
34
35  address pd_location(VMReg reg) const;
36  void pd_clear();
37  void pd_initialize_from(const RegisterMap* map) {
38    _window         = map->_window;
39    _younger_window = map->_younger_window;
40    _location_valid[0] = 0;  // avoid the shift_individual_registers game
41  }
42  void pd_initialize() {
43    _window = NULL;
44    _younger_window = NULL;
45    _location_valid[0] = 0;  // avoid the shift_individual_registers game
46  }
47  void shift_window(intptr_t* sp, intptr_t* younger_sp) {
48    _window         = sp;
49    _younger_window = younger_sp;
50    // Throw away locations for %i, %o, and %l registers:
51    // But do not throw away %g register locs.
52    if (_location_valid[0] != 0)  shift_individual_registers();
53  }
54  void shift_individual_registers();
55  // When popping out of compiled frames, we make all IRegs disappear.
56  void make_integer_regs_unsaved() { _location_valid[0] = 0; }
57
58#endif // CPU_SPARC_VM_REGISTERMAP_SPARC_HPP
59