Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/debugger/win32/Win32LDTEntry.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/debugger/win32/Win32LDTEntry.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,100 @@ +/* + * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +package sun.jvm.hotspot.debugger.win32; + +import java.io.Serializable; + +/** Describes an LDT entry. (Some of the descriptions are taken + directly from Microsoft's documentation and are copyrighted by + Microsoft.) */ + +class Win32LDTEntry implements Serializable { + private short limitLow; + private short baseLow; + private byte baseMid; + private byte flags1; + private byte flags2; + private byte baseHi; + + private Win32LDTEntry() {} + + public Win32LDTEntry(short limitLow, + short baseLow, + byte baseMid, + byte flags1, + byte flags2, + byte baseHi) { + this.limitLow = limitLow; + this.baseLow = baseLow; + this.baseMid = baseMid; + this.flags1 = flags1; + this.flags2 = flags2; + this.baseHi = baseHi; + } + + /** Returns base address of segment */ + public long getBase() { return ( (baseLow & 0xFFFF) | + ((baseMid & 0xFF) << 16) | + ((baseHi & 0xFF) << 24)) & 0xFFFFFFFF; } + + public short getLimitLow() { return limitLow; } + public short getBaseLow() { return baseLow; } + public byte getBaseMid() { return baseMid; } + public byte getBaseHi() { return baseHi; } + + // FIXME: must verify mask and shift are correct + /** Describes type of segment. See TYPE_ portion of {@link + sun.jvm.hotspot.debugger.win32.Win32LDTEntryConstants}. */ + public int getType() { return (flags1 & 0x1F); } + + // FIXME: verify mask and shift are correct + /** Privilege level of descriptor: 0 = most privileged, 3 = least privileged */ + public int getPrivilegeLevel() { return ((flags1 & 0x60) >> 5); } + + // FIXME: verify mask is correct + /** Is segment present in physical memory? */ + public boolean isSegmentPhysical() { return ((flags1 & 0x70) != 0); } + + // FIXME: verify mask and shift are correct + /** High bits (16-19) of the address of the last byte of the segment */ + public int getLimitHi() { return (flags2 & 0x0F); } + + // FIXME: verify mask is correct + /** <P> Size of segment. If the segment is a data segment, this + member contains 1 if the segment is larger than 64 kilobytes (K) + or 0 if the segment is smaller than or equal to 64K. </P> + + <P> If the segment is a code segment, this member contains 1 if + the segment is a code segment and runs with the default (native + mode) instruction set. This member contains 0 if the code + segment is an 80286 code segment and runs with 16-bit offsets + and the 80286-compatible instruction set. </P> */ + public boolean isDefaultBig() { return ((flags2 & 0x40) != 0); } + + // FIXME: verify mask is correct + /** Returns true if segment is page granular, false if byte + granular. */ + public boolean isPageGranular() { return ((flags2 & 0x80) != 0); } +}