1 /* 2 * Copyright (c) 2012, 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 static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 26 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK; 27 28 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 29 import org.graalvm.compiler.lir.LIRInstructionClass; 30 import org.graalvm.compiler.lir.Opcode; 31 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 32 33 import jdk.vm.ci.meta.Value; 34 35 /** 36 * Emits a breakpoint. 37 */ 38 @Opcode("BREAKPOINT") 39 public final class SPARCBreakpointOp extends SPARCLIRInstruction { 40 public static final LIRInstructionClass<SPARCBreakpointOp> TYPE = LIRInstructionClass.create(SPARCBreakpointOp.class); 41 public static final SizeEstimate SIZE = SizeEstimate.create(1); 42 43 // historical - from hotspot src/cpu/sparc/vm 44 // <sys/trap.h> promises that the system will not use traps 16-31 45 // We want to use ST_BREAKPOINT here, but the debugger is confused by it. 46 public static final int ST_RESERVED_FOR_USER_0 = 0x10; 47 48 /** 49 * A set of values loaded into the Java ABI parameter locations (for inspection by a debugger). 50 */ 51 @Use({REG, STACK}) protected Value[] parameters; 52 53 public SPARCBreakpointOp(Value[] parameters) { 54 super(TYPE, SIZE); 55 this.parameters = parameters; 56 } 57 58 @Override 59 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 60 masm.ta(ST_RESERVED_FOR_USER_0); 61 } 62 }