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