1 /* 2 * Copyright (c) 1998, 2019, 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_REGISTERMAP_SPARC_HPP 26 #define CPU_SPARC_REGISTERMAP_SPARC_HPP 27 28 // machine-dependent implemention for register maps 29 friend class frame; 30 friend class MethodHandles; 31 32 private: 33 intptr_t* _window; // register window save area (for L and I regs) 34 intptr_t* _younger_window; // previous save area (for O regs, if needed) 35 36 address pd_location(VMReg reg) const; 37 void pd_clear(); 38 void pd_initialize_from(const RegisterMap* map) { 39 _window = map->_window; 40 _younger_window = map->_younger_window; 41 _location_valid[0] = 0; // avoid the shift_individual_registers game 42 } 43 void pd_initialize() { 44 _window = NULL; 45 _younger_window = NULL; 46 _location_valid[0] = 0; // avoid the shift_individual_registers game 47 } 48 void shift_window(intptr_t* sp, intptr_t* younger_sp) { 49 _window = sp; 50 _younger_window = younger_sp; 51 // Throw away locations for %i, %o, and %l registers: 52 // But do not throw away %g register locs. 53 if (_location_valid[0] != 0) shift_individual_registers(); 54 } 55 void shift_individual_registers(); 56 // When popping out of compiled frames, we make all IRegs disappear. 57 void make_integer_regs_unsaved() { _location_valid[0] = 0; } 58 59 #endif // CPU_SPARC_REGISTERMAP_SPARC_HPP