registerMap_sparc.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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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.
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23 */
24
25// machine-dependent implemention for register maps
26  friend class frame;
27
28 private:
29  intptr_t* _window;         // register window save area (for L and I regs)
30  intptr_t* _younger_window; // previous save area (for O regs, if needed)
31
32  address pd_location(VMReg reg) const;
33  void pd_clear();
34  void pd_initialize_from(const RegisterMap* map) {
35    _window         = map->_window;
36    _younger_window = map->_younger_window;
37    _location_valid[0] = 0;  // avoid the shift_individual_registers game
38  }
39  void pd_initialize() {
40    _window = NULL;
41    _younger_window = NULL;
42    _location_valid[0] = 0;  // avoid the shift_individual_registers game
43  }
44  void shift_window(intptr_t* sp, intptr_t* younger_sp) {
45    _window         = sp;
46    _younger_window = younger_sp;
47    // Throw away locations for %i, %o, and %l registers:
48    // But do not throw away %g register locs.
49    if (_location_valid[0] != 0)  shift_individual_registers();
50  }
51  void shift_individual_registers();
52  // When popping out of compiled frames, we make all IRegs disappear.
53  void make_integer_regs_unsaved() { _location_valid[0] = 0; }
54