1 /* 2 * Copyright (c) 2022, 2023, 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_PPC_CONTINUATIONHELPER_PPC_INLINE_HPP 26 #define CPU_PPC_CONTINUATIONHELPER_PPC_INLINE_HPP 27 28 #include "runtime/continuationHelper.hpp" 29 30 template<typename FKind> 31 static inline intptr_t** link_address(const frame& f) { 32 Unimplemented(); 33 return nullptr; 34 } 35 36 static inline void patch_return_pc_with_preempt_stub(frame& f) { 37 Unimplemented(); 38 } 39 40 inline int ContinuationHelper::frame_align_words(int size) { 41 return size & 1; 42 } 43 44 inline intptr_t* ContinuationHelper::frame_align_pointer(intptr_t* p) { 45 return align_down(p, frame::frame_alignment); 46 } 47 48 template<typename FKind> 49 inline void ContinuationHelper::update_register_map(const frame& f, RegisterMap* map) { 50 // Currently all registers are considered to be volatile and saved in the caller (java) frame if needed 51 } 52 53 inline void ContinuationHelper::update_register_map_with_callee(const frame& f, RegisterMap* map) { 54 // Currently all registers are considered to be volatile and saved in the caller (java) frame if needed 55 } 56 57 inline void ContinuationHelper::push_pd(const frame& f) { 58 f.own_abi()->callers_sp = (uint64_t)f.fp(); 59 } 60 61 62 inline void ContinuationHelper::set_anchor_to_entry_pd(JavaFrameAnchor* anchor, ContinuationEntry* cont) { 63 // nothing to do 64 } 65 66 inline void ContinuationHelper::set_anchor_pd(JavaFrameAnchor* anchor, intptr_t* sp) { 67 // nothing to do 68 } 69 70 #ifdef ASSERT 71 inline bool ContinuationHelper::Frame::assert_frame_laid_out(frame f) { 72 intptr_t* sp = f.sp(); 73 address pc = *(address*)(sp - frame::sender_sp_ret_address_offset()); 74 intptr_t* fp = (intptr_t*)f.own_abi()->callers_sp; 75 assert(f.raw_pc() == pc, "f.ra_pc: " INTPTR_FORMAT " actual: " INTPTR_FORMAT, p2i(f.raw_pc()), p2i(pc)); 76 assert(f.fp() == fp, "f.fp: " INTPTR_FORMAT " actual: " INTPTR_FORMAT, p2i(f.fp()), p2i(fp)); 77 return f.raw_pc() == pc && f.fp() == fp; 78 } 79 #endif 80 81 inline intptr_t** ContinuationHelper::Frame::callee_link_address(const frame& f) { 82 return (intptr_t**)&f.own_abi()->callers_sp; 83 } 84 85 inline address* ContinuationHelper::InterpretedFrame::return_pc_address(const frame& f) { 86 return (address*)&f.callers_abi()->lr; 87 } 88 89 inline void ContinuationHelper::InterpretedFrame::patch_sender_sp(frame& f, const frame& caller) { 90 intptr_t* sp = caller.unextended_sp(); 91 if (!f.is_heap_frame() && caller.is_interpreted_frame()) { 92 // See diagram "Interpreter Calling Procedure on PPC" at the end of continuationFreezeThaw_ppc.inline.hpp 93 sp = (intptr_t*)caller.at_relative(ijava_idx(top_frame_sp)); 94 } 95 assert(f.is_interpreted_frame(), ""); 96 assert(f.is_heap_frame() || is_aligned(sp, frame::alignment_in_bytes), ""); 97 intptr_t* la = f.addr_at(ijava_idx(sender_sp)); 98 *la = f.is_heap_frame() ? (intptr_t)(sp - f.fp()) : (intptr_t)sp; 99 } 100 101 inline address* ContinuationHelper::Frame::return_pc_address(const frame& f) { 102 return (address*)&f.callers_abi()->lr; 103 } 104 105 inline address ContinuationHelper::Frame::real_pc(const frame& f) { 106 return (address)f.own_abi()->lr; 107 } 108 109 inline void ContinuationHelper::Frame::patch_pc(const frame& f, address pc) { 110 f.own_abi()->lr = (uint64_t)pc; 111 } 112 113 // | Minimal ABI | 114 // | (frame::java_abi) | 115 // | 4 words | 116 // | Caller's SP |<- FP of f's caller 117 // |======================| 118 // | | Frame of f's caller 119 // | | 120 // frame_bottom of f ->| | 121 // |----------------------| 122 // | L0 aka P0 | 123 // | : | 124 // | : Pn | 125 // | : | 126 // | Lm | 127 // |----------------------| 128 // | SP alignment (opt.) | 129 // |----------------------| 130 // | Minimal ABI | 131 // | (frame::java_abi) | 132 // | 4 words | 133 // | Caller's SP |<- SP of f's caller / FP of f 134 // |======================| 135 // |ijava_state (metadata)| Frame of f 136 // | | 137 // | | 138 // |----------------------| 139 // | Expression stack | 140 // | | 141 // frame_top of f ->| | 142 // if callee interp. |......................| 143 // | L0 aka P0 |<- ijava_state.esp + callee_argsize 144 // | : | 145 // frame_top of f ->| : Pn | 146 // + metadata_words | : |<- ijava_state.esp (1 slot below Pn) 147 // if callee comp. | Lm | 148 // |----------------------| 149 // | SP alignment (opt.) | 150 // |----------------------| 151 // | Minimal ABI | 152 // | (frame::java_abi) | 153 // | 4 words | 154 // | Caller's SP |<- SP of f / FP of f's callee 155 // |======================| 156 // |ijava_state (metadata)| Frame of f's callee 157 // | | 158 // 159 // | Growth | 160 // v v 161 // 162 // See also diagram at the end of continuation_ppc.inline.hpp 163 // 164 inline intptr_t* ContinuationHelper::InterpretedFrame::frame_top(const frame& f, InterpreterOopMap* mask) { // inclusive; this will be copied with the frame 165 int expression_stack_sz = expression_stack_size(f, mask); 166 intptr_t* res = (intptr_t*)f.interpreter_frame_monitor_end() - expression_stack_sz; 167 assert(res <= (intptr_t*)f.get_ijava_state() - expression_stack_sz, 168 "res=" PTR_FORMAT " f.get_ijava_state()=" PTR_FORMAT " expression_stack_sz=%d", 169 p2i(res), p2i(f.get_ijava_state()), expression_stack_sz); 170 assert(res >= f.unextended_sp(), 171 "res: " INTPTR_FORMAT " ijava_state: " INTPTR_FORMAT " esp: " INTPTR_FORMAT " unextended_sp: " INTPTR_FORMAT " expression_stack_size: %d", 172 p2i(res), p2i(f.get_ijava_state()), f.get_ijava_state()->esp, p2i(f.unextended_sp()), expression_stack_sz); 173 return res; 174 } 175 176 inline intptr_t* ContinuationHelper::InterpretedFrame::frame_bottom(const frame& f) { 177 return (intptr_t*)f.at_relative(ijava_idx(locals)) + 1; // exclusive (will not be copied), so we add 1 word 178 } 179 180 inline intptr_t* ContinuationHelper::InterpretedFrame::frame_top(const frame& f, int callee_argsize_incl_metadata, bool callee_interpreted) { 181 intptr_t* pseudo_unextended_sp = f.interpreter_frame_esp() + 1 - frame::metadata_words_at_top; 182 return pseudo_unextended_sp + (callee_interpreted ? callee_argsize_incl_metadata : 0); 183 } 184 185 inline intptr_t* ContinuationHelper::InterpretedFrame::callers_sp(const frame& f) { 186 return f.fp(); 187 } 188 189 #endif // CPU_PPC_CONTINUATIONFRAMEHELPERS_PPC_INLINE_HPP