1 /*
2 * Copyright (c) 1997, 2016, 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.
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24 */
25
26 #ifndef CPU_AARCH64_VM_FRAME_AARCH64_HPP
27 #define CPU_AARCH64_VM_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 // [methodData ] = mdp() mdx_offset
50 // [methodOop ] = method() method_offset
51
52 // [last esp ] = last_sp() last_sp_offset
53 // [old stack pointer ] (sender_sp) sender_sp_offset
54
55 // [old frame pointer ] <- fp = link()
56 // [return pc ]
57
58 // [last sp ]
59 // [oop temp ] (only for native calls)
60
61 // [locals and parameters ]
62 // <- sender sp
63 // ------------------------------ Asm interpreter ----------------------------------------
64
65 public:
66 enum {
67 pc_return_offset = 0,
68 // All frames
69 link_offset = 0,
70 return_addr_offset = 1,
71 sender_sp_offset = 2,
72
73 // Interpreter frames
74 interpreter_frame_oop_temp_offset = 3, // for native calls only
75
76 interpreter_frame_sender_sp_offset = -1,
77 // outgoing sp before a call to an invoked method
78 interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1,
79 interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1,
80 interpreter_frame_mdp_offset = interpreter_frame_method_offset - 1,
81 interpreter_frame_padding_offset = interpreter_frame_mdp_offset - 1,
82 interpreter_frame_mirror_offset = interpreter_frame_padding_offset - 1,
83 interpreter_frame_cache_offset = interpreter_frame_mirror_offset - 1,
84 interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1,
85 interpreter_frame_bcp_offset = interpreter_frame_locals_offset - 1,
86 interpreter_frame_initial_sp_offset = interpreter_frame_bcp_offset - 1,
87
88 interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset,
89 interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset,
90
91 // Entry frames
92 // n.b. these values are determined by the layout defined in
93 // stubGenerator for the Java call stub
94 entry_frame_after_call_words = 27,
95 entry_frame_call_wrapper_offset = -8,
96
97 // we don't need a save area
98 arg_reg_save_area_bytes = 0
99
100 };
101
102 intptr_t ptr_at(int offset) const {
103 return *ptr_at_addr(offset);
104 }
105
106 void ptr_at_put(int offset, intptr_t value) {
107 *ptr_at_addr(offset) = value;
108 }
109
110 private:
111 // an additional field beyond _sp and _pc:
112 intptr_t* _fp; // frame pointer
113 // The interpreter and adapters will extend the frame of the caller.
114 // Since oopMaps are based on the sp of the caller before extension
115 // we need to know that value. However in order to compute the address
116 // of the return address we need the real "raw" sp. Since sparc already
117 // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's
118 // original sp we use that convention.
119
120 intptr_t* _unextended_sp;
121 void adjust_unextended_sp();
122
123 intptr_t* ptr_at_addr(int offset) const {
124 return (intptr_t*) addr_at(offset);
125 }
126
127 #ifdef ASSERT
128 // Used in frame::sender_for_{interpreter,compiled}_frame
129 static void verify_deopt_original_pc( CompiledMethod* nm, intptr_t* unextended_sp);
130 #endif
131
132 public:
133 // Constructors
134
135 frame(intptr_t* sp, intptr_t* fp, address pc);
136
137 frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc);
138
139 frame(intptr_t* sp, intptr_t* fp);
140
141 void init(intptr_t* sp, intptr_t* fp, address pc);
142
143 // accessors for the instance variables
144 // Note: not necessarily the real 'frame pointer' (see real_fp)
145 intptr_t* fp() const { return _fp; }
146
147 inline address* sender_pc_addr() const;
148
149 // expression stack tos if we are nested in a java call
150 intptr_t* interpreter_frame_last_sp() const;
151
152 // helper to update a map with callee-saved RBP
153 static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr);
154
155 // deoptimization support
156 void interpreter_frame_set_last_sp(intptr_t* sp);
157
158 #endif // CPU_AARCH64_VM_FRAME_AARCH64_HPP