Mercurial > hg > truffle
diff graal/com.oracle.graal.lir.sparc/src/com/oracle/graal/lir/sparc/SPARCFrameMap.java @ 10956:563c6d1994c0
added architecture specific frame maps
author | twisti |
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date | Wed, 31 Jul 2013 14:04:24 -0700 |
parents | |
children | e2c63a0b799c |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.lir.sparc/src/com/oracle/graal/lir/sparc/SPARCFrameMap.java Wed Jul 31 14:04:24 2013 -0700 @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package com.oracle.graal.lir.sparc; + +import com.oracle.graal.api.code.*; +import com.oracle.graal.api.meta.*; +import com.oracle.graal.lir.*; + +/** + * SPARC specific frame map. + * + * This is the format of a SPARC stack frame: + * + * <pre> + * Base Contents + * + * : : ----- + * caller | incoming overflow argument n | ^ + * frame : ... : | positive + * | incoming overflow argument 0 | | offsets + * ---------+--------------------------------+--------------------- + * | spill slot 0 | | negative ^ | + * : ... : v offsets | | + * | spill slot n | ----- total frame + * +--------------------------------+ frame size + * current | alignment padding | size | + * frame +--------------------------------+ ----- | | + * | outgoing overflow argument n | ^ | | + * : ... : | positive | | + * | outgoing overflow argument 0 | | offsets | v + * +--------------------------------+ | | + * | return address | | | + * +--------------------------------+ | | ----- + * | | | | ^ + * : callee save area : | | | + * | | | v | + * %sp--> +--------------------------------+--------------------------- + * + * </pre> + * + * The spill slot area also includes stack allocated memory blocks (ALLOCA blocks). The size of such + * a block may be greater than the size of a normal spill slot or the word size. + * <p> + * A runtime can reserve space at the beginning of the overflow argument area. The calling + * convention can specify that the first overflow stack argument is not at offset 0, but at a + * specified offset. Use {@link CodeCacheProvider#getMinimumOutgoingSize()} to make sure that + * call-free methods also have this space reserved. Then the VM can use the memory at offset 0 + * relative to the stack pointer. + */ +public final class SPARCFrameMap extends FrameMap { + + public SPARCFrameMap(CodeCacheProvider runtime, TargetDescription target, RegisterConfig registerConfig) { + super(runtime, target, registerConfig); + } + + @Override + public int offsetToCalleeSaveArea() { + return 0; + } + + @Override + protected StackSlot allocateNewSpillSlot(PlatformKind kind, int additionalOffset) { + return StackSlot.get(kind, spillSize + additionalOffset, false); + } +}