Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/debugger/win32/Win32LDTEntry.java @ 1913:3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 30 Oct 2010 13:08:23 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.debugger.win32; | |
| 26 | |
| 27 import java.io.Serializable; | |
| 28 | |
| 29 /** Describes an LDT entry. (Some of the descriptions are taken | |
| 30 directly from Microsoft's documentation and are copyrighted by | |
| 31 Microsoft.) */ | |
| 32 | |
| 33 class Win32LDTEntry implements Serializable { | |
| 34 private short limitLow; | |
| 35 private short baseLow; | |
| 36 private byte baseMid; | |
| 37 private byte flags1; | |
| 38 private byte flags2; | |
| 39 private byte baseHi; | |
| 40 | |
| 41 private Win32LDTEntry() {} | |
| 42 | |
| 43 public Win32LDTEntry(short limitLow, | |
| 44 short baseLow, | |
| 45 byte baseMid, | |
| 46 byte flags1, | |
| 47 byte flags2, | |
| 48 byte baseHi) { | |
| 49 this.limitLow = limitLow; | |
| 50 this.baseLow = baseLow; | |
| 51 this.baseMid = baseMid; | |
| 52 this.flags1 = flags1; | |
| 53 this.flags2 = flags2; | |
| 54 this.baseHi = baseHi; | |
| 55 } | |
| 56 | |
| 57 /** Returns base address of segment */ | |
| 58 public long getBase() { return ( (baseLow & 0xFFFF) | | |
| 59 ((baseMid & 0xFF) << 16) | | |
| 60 ((baseHi & 0xFF) << 24)) & 0xFFFFFFFF; } | |
| 61 | |
| 62 public short getLimitLow() { return limitLow; } | |
| 63 public short getBaseLow() { return baseLow; } | |
| 64 public byte getBaseMid() { return baseMid; } | |
| 65 public byte getBaseHi() { return baseHi; } | |
| 66 | |
| 67 // FIXME: must verify mask and shift are correct | |
| 68 /** Describes type of segment. See TYPE_ portion of {@link | |
| 69 sun.jvm.hotspot.debugger.win32.Win32LDTEntryConstants}. */ | |
| 70 public int getType() { return (flags1 & 0x1F); } | |
| 71 | |
| 72 // FIXME: verify mask and shift are correct | |
| 73 /** Privilege level of descriptor: 0 = most privileged, 3 = least privileged */ | |
| 74 public int getPrivilegeLevel() { return ((flags1 & 0x60) >> 5); } | |
| 75 | |
| 76 // FIXME: verify mask is correct | |
| 77 /** Is segment present in physical memory? */ | |
| 78 public boolean isSegmentPhysical() { return ((flags1 & 0x70) != 0); } | |
| 79 | |
| 80 // FIXME: verify mask and shift are correct | |
| 81 /** High bits (16-19) of the address of the last byte of the segment */ | |
| 82 public int getLimitHi() { return (flags2 & 0x0F); } | |
| 83 | |
| 84 // FIXME: verify mask is correct | |
| 85 /** <P> Size of segment. If the segment is a data segment, this | |
| 86 member contains 1 if the segment is larger than 64 kilobytes (K) | |
| 87 or 0 if the segment is smaller than or equal to 64K. </P> | |
| 88 | |
| 89 <P> If the segment is a code segment, this member contains 1 if | |
| 90 the segment is a code segment and runs with the default (native | |
| 91 mode) instruction set. This member contains 0 if the code | |
| 92 segment is an 80286 code segment and runs with 16-bit offsets | |
| 93 and the 80286-compatible instruction set. </P> */ | |
| 94 public boolean isDefaultBig() { return ((flags2 & 0x40) != 0); } | |
| 95 | |
| 96 // FIXME: verify mask is correct | |
| 97 /** Returns true if segment is page granular, false if byte | |
| 98 granular. */ | |
| 99 public boolean isPageGranular() { return ((flags2 & 0x80) != 0); } | |
| 100 } |