1 /*
2 * Copyright (c) 2013, 2015, 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 package org.graalvm.compiler.lir.sparc;
24
25 import org.graalvm.compiler.core.common.LIRKind;
26 import org.graalvm.compiler.lir.framemap.FrameMap;
27
28 import jdk.vm.ci.code.CodeCacheProvider;
29 import jdk.vm.ci.code.RegisterConfig;
30 import jdk.vm.ci.code.StackSlot;
31 import jdk.vm.ci.meta.ValueKind;
32 import jdk.vm.ci.sparc.SPARC;
33 import jdk.vm.ci.sparc.SPARCKind;
34
35 /**
36 * SPARC specific frame map.
37 *
38 * This is the format of a SPARC stack frame:
39 *
40 * <pre>
41 * Base Contents
42 * : : -----
43 * caller | incoming overflow argument n | ^
44 * frame : ... : | positive
45 * | incoming overflow argument 0 | | offsets
46 * +--------------------------------+ |
47 * | | |
48 * : register save area : |
49 * | | |
50 * ---------+--------------------------------+---------------------------
51 * | spill slot 0 | | negative ^ ^
52 * : ... : v offsets | |
53 * | spill slot n | ----- total |
54 * +--------------------------------+ frame |
55 * current | alignment padding | size |
56 * frame +--------------------------------+ ----- | |
57 * | outgoing overflow argument n | ^ | frame
58 * : ... : | positive | size
59 * | outgoing overflow argument 0 | | offsets | |
60 * +--------------------------------+ | | |
61 * | return address | | | |
62 * +--------------------------------+ | | |
63 * | | | | |
64 * : callee save area : | | |
65 * | | | v v
66 * %sp--> +--------------------------------+---------------------------
67 *
68 * </pre>
69 *
70 * The spill slot area also includes stack allocated memory blocks (ALLOCA blocks). The size of such
71 * a block may be greater than the size of a normal spill slot or the word size.
72 * <p>
73 * A runtime can reserve space at the beginning of the overflow argument area. The calling
74 * convention can specify that the first overflow stack argument is not at offset 0, but at a
75 * specified offset. Use {@link CodeCacheProvider#getMinimumOutgoingSize()} to make sure that
76 * call-free methods also have this space reserved. Then the VM can use the memory at offset 0
77 * relative to the stack pointer.
78 */
79 public final class SPARCFrameMap extends FrameMap {
80
81 public SPARCFrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig, ReferenceMapBuilderFactory referenceMapFactory) {
82 super(codeCache, registerConfig, referenceMapFactory);
83 // Initial spill size is set to register save area size (SPARC register window)
84 initialSpillSize = 0;
85 spillSize = initialSpillSize;
86 }
87
88 @Override
89 public int totalFrameSize() {
90 return frameSize();
91 }
92
93 @Override
94 public int currentFrameSize() {
95 return alignFrameSize(SPARC.REGISTER_SAFE_AREA_SIZE + outgoingSize + spillSize);
96 }
97
98 /**
99 * In SPARC we have spill slots word aligned.
100 */
101 @Override
102 public int spillSlotSize(ValueKind<?> kind) {
103 return kind.getPlatformKind().getSizeInBytes();
104 }
105
106 @Override
107 public int offsetForStackSlot(StackSlot slot) {
108 // @formatter:off
109 assert (!slot.getRawAddFrameSize() && slot.getRawOffset() < outgoingSize + SPARC.REGISTER_SAFE_AREA_SIZE) ||
110 (slot.getRawAddFrameSize() && slot.getRawOffset() < 0 && -slot.getRawOffset() <= spillSize) ||
111 (slot.getRawAddFrameSize() && slot.getRawOffset() >= 0) :
112 String.format("RawAddFrameSize: %b RawOffset: 0x%x spillSize: 0x%x outgoingSize: 0x%x", slot.getRawAddFrameSize(), slot.getRawOffset(), spillSize, outgoingSize);
113 // @formatter:on
114 return super.offsetForStackSlot(slot);
115 }
116
117 @Override
118 public boolean frameNeedsAllocating() {
119 return super.frameNeedsAllocating() || spillSize > 0;
120 }
121
122 public StackSlot allocateDeoptimizationRescueSlot() {
123 assert spillSize == initialSpillSize : "Deoptimization rescue slot must be the first stack slot";
124 return allocateSpillSlot(LIRKind.value(SPARCKind.XWORD));
125 }
126 }