1 /* 2 * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_AARCH64_FRAME_AARCH64_HPP 27 #define CPU_AARCH64_FRAME_AARCH64_HPP 28 29 #include "runtime/synchronizer.hpp" 30 31 // A frame represents a physical stack frame (an activation). Frames can be 32 // C or Java frames, and the Java frames can be interpreted or compiled. 33 // In contrast, vframes represent source-level activations, so that one physical frame 34 // can correspond to multiple source level frames because of inlining. 35 // A frame is comprised of {pc, fp, sp} 36 // ------------------------------ Asm interpreter ---------------------------------------- 37 // Layout of asm interpreter frame: 38 // [expression stack ] * <- sp 39 40 // [monitors[0] ] \ 41 // ... | monitor block size = k 42 // [monitors[k-1] ] / 43 // [frame initial esp ] ( == &monitors[0], initially here) initial_sp_offset 44 // [byte code index/pointr] = bcx() bcx_offset 45 46 // [pointer to locals ] = locals() locals_offset 47 // [constant pool cache ] = cache() cache_offset 48 49 // [klass of method ] = mirror() mirror_offset 50 // [padding ] 51 52 // [methodData ] = mdp() mdx_offset 53 // [Method ] = method() method_offset 54 55 // [last esp ] = last_sp() last_sp_offset 56 // [old stack pointer ] (sender_sp) sender_sp_offset 57 58 // [old frame pointer ] <- fp = link() 59 // [return pc ] 60 61 // [last sp ] 62 // [oop temp ] (only for native calls) 63 64 // [padding ] (to preserve machine SP alignment) 65 // [locals and parameters ] 66 // <- sender sp 67 // ------------------------------ Asm interpreter ---------------------------------------- 68 69 public: 70 enum { 71 pc_return_offset = 0, 72 // All frames 73 link_offset = 0, 74 return_addr_offset = 1, 75 sender_sp_offset = 2, 76 77 // Interpreter frames 78 interpreter_frame_oop_temp_offset = 3, // for native calls only 79 80 interpreter_frame_sender_sp_offset = -1, 81 // outgoing sp before a call to an invoked method 82 interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1, 83 interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1, 84 interpreter_frame_mdp_offset = interpreter_frame_method_offset - 1, 85 interpreter_frame_padding_offset = interpreter_frame_mdp_offset - 1, 86 interpreter_frame_mirror_offset = interpreter_frame_padding_offset - 1, 87 interpreter_frame_cache_offset = interpreter_frame_mirror_offset - 1, 88 interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, 89 interpreter_frame_bcp_offset = interpreter_frame_locals_offset - 1, 90 interpreter_frame_initial_sp_offset = interpreter_frame_bcp_offset - 1, 91 92 interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, 93 interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, 94 95 // Entry frames 96 // n.b. these values are determined by the layout defined in 97 // stubGenerator for the Java call stub 98 entry_frame_after_call_words = 27, 99 entry_frame_call_wrapper_offset = -8, 100 101 // we don't need a save area 102 arg_reg_save_area_bytes = 0 103 104 }; 105 ptr_at(int offset) const106 intptr_t ptr_at(int offset) const { 107 return *ptr_at_addr(offset); 108 } 109 ptr_at_put(int offset,intptr_t value)110 void ptr_at_put(int offset, intptr_t value) { 111 *ptr_at_addr(offset) = value; 112 } 113 114 private: 115 // an additional field beyond _sp and _pc: 116 intptr_t* _fp; // frame pointer 117 // The interpreter and adapters will extend the frame of the caller. 118 // Since oopMaps are based on the sp of the caller before extension 119 // we need to know that value. However in order to compute the address 120 // of the return address we need the real "raw" sp. Since sparc already 121 // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's 122 // original sp we use that convention. 123 124 intptr_t* _unextended_sp; 125 void adjust_unextended_sp(); 126 ptr_at_addr(int offset) const127 intptr_t* ptr_at_addr(int offset) const { 128 return (intptr_t*) addr_at(offset); 129 } 130 131 #ifdef ASSERT 132 // Used in frame::sender_for_{interpreter,compiled}_frame 133 static void verify_deopt_original_pc( CompiledMethod* nm, intptr_t* unextended_sp); 134 #endif 135 136 public: 137 // Constructors 138 139 frame(intptr_t* sp, intptr_t* fp, address pc); 140 141 frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); 142 143 frame(intptr_t* sp, intptr_t* fp); 144 145 void init(intptr_t* sp, intptr_t* fp, address pc); 146 147 // accessors for the instance variables 148 // Note: not necessarily the real 'frame pointer' (see real_fp) fp() const149 intptr_t* fp() const { return _fp; } 150 151 inline address* sender_pc_addr() const; 152 inline address sender_pc_maybe_signed() const; 153 154 // expression stack tos if we are nested in a java call 155 intptr_t* interpreter_frame_last_sp() const; 156 157 // helper to update a map with callee-saved RBP 158 static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr); 159 160 // deoptimization support 161 void interpreter_frame_set_last_sp(intptr_t* sp); 162 interpreter_frame_expression_stack_direction()163 static jint interpreter_frame_expression_stack_direction() { return -1; } 164 165 // returns the sending frame, without applying any barriers 166 frame sender_raw(RegisterMap* map) const; 167 168 #endif // CPU_AARCH64_FRAME_AARCH64_HPP 169