| /* |
| * Copyright (c) 2013, 2015, 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 org.graalvm.compiler.lir.amd64; |
| |
| import static jdk.vm.ci.code.ValueUtil.asStackSlot; |
| |
| import org.graalvm.compiler.asm.NumUtil; |
| import org.graalvm.compiler.core.common.LIRKind; |
| import org.graalvm.compiler.lir.framemap.FrameMap; |
| |
| import jdk.vm.ci.amd64.AMD64Kind; |
| import jdk.vm.ci.code.CodeCacheProvider; |
| import jdk.vm.ci.code.RegisterConfig; |
| import jdk.vm.ci.code.StackSlot; |
| |
| /** |
| * AMD64 specific frame map. |
| * |
| * This is the format of an AMD64 stack frame: |
| * |
| * <pre> |
| * Base Contents |
| * |
| * : : ----- |
| * caller | incoming overflow argument n | ^ |
| * frame : ... : | positive |
| * | incoming overflow argument 0 | | offsets |
| * ---------+--------------------------------+--------------------- |
| * | return address | | ^ |
| * current +--------------------------------+ | | ----- |
| * frame | | | | ^ |
| * : callee save area : | | | |
| * | | | | | |
| * +--------------------------------+ | | | |
| * | spill slot 0 | | negative | | |
| * : ... : v offsets | | |
| * | spill slot n | ----- total frame |
| * +--------------------------------+ frame size |
| * | alignment padding | size | |
| * +--------------------------------+ ----- | | |
| * | outgoing overflow argument n | ^ | | |
| * : ... : | positive | | |
| * | outgoing overflow argument 0 | | offsets v 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 class AMD64FrameMap extends FrameMap { |
| |
| private StackSlot rbpSpillSlot; |
| |
| public AMD64FrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig, ReferenceMapBuilderFactory referenceMapFactory) { |
| super(codeCache, registerConfig, referenceMapFactory); |
| // (negative) offset relative to sp + total frame size |
| initialSpillSize = returnAddressSize(); |
| spillSize = initialSpillSize; |
| } |
| |
| @Override |
| public int totalFrameSize() { |
| return frameSize() + returnAddressSize(); |
| } |
| |
| @Override |
| public int currentFrameSize() { |
| return alignFrameSize(outgoingSize + spillSize - returnAddressSize()); |
| } |
| |
| @Override |
| protected int alignFrameSize(int size) { |
| return NumUtil.roundUp(size + returnAddressSize(), getTarget().stackAlignment) - returnAddressSize(); |
| } |
| |
| @Override |
| public int offsetForStackSlot(StackSlot slot) { |
| // @formatter:off |
| assert (!slot.getRawAddFrameSize() && slot.getRawOffset() < outgoingSize) || |
| (slot.getRawAddFrameSize() && slot.getRawOffset() < 0 && -slot.getRawOffset() <= spillSize) || |
| (slot.getRawAddFrameSize() && slot.getRawOffset() >= 0) : |
| String.format("RawAddFrameSize: %b RawOffset: 0x%x spillSize: 0x%x outgoingSize: 0x%x", slot.getRawAddFrameSize(), slot.getRawOffset(), spillSize, outgoingSize); |
| // @formatter:on |
| return super.offsetForStackSlot(slot); |
| } |
| |
| /** |
| * For non-leaf methods, RBP is preserved in the special stack slot required by the HotSpot |
| * runtime for walking/inspecting frames of such methods. |
| */ |
| StackSlot allocateRBPSpillSlot() { |
| assert spillSize == initialSpillSize : "RBP spill slot must be the first allocated stack slots"; |
| rbpSpillSlot = allocateSpillSlot(LIRKind.value(AMD64Kind.QWORD)); |
| assert asStackSlot(rbpSpillSlot).getRawOffset() == -16 : asStackSlot(rbpSpillSlot).getRawOffset(); |
| return rbpSpillSlot; |
| } |
| |
| void freeRBPSpillSlot() { |
| int size = spillSlotSize(LIRKind.value(AMD64Kind.QWORD)); |
| assert spillSize == NumUtil.roundUp(initialSpillSize + size, size) : "RBP spill slot can not be freed after allocation other stack slots"; |
| spillSize = initialSpillSize; |
| } |
| |
| public StackSlot allocateDeoptimizationRescueSlot() { |
| assert spillSize == initialSpillSize || spillSize == initialSpillSize + |
| spillSlotSize(LIRKind.value(AMD64Kind.QWORD)) : "Deoptimization rescue slot must be the first or second (if there is an RBP spill slot) stack slot"; |
| return allocateSpillSlot(LIRKind.value(AMD64Kind.QWORD)); |
| } |
| } |
