1 /* 2 * Copyright (c) 2012, 2018, 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 24 25 package org.graalvm.compiler.lir.sparc; 26 27 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 28 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK; 29 30 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 31 import org.graalvm.compiler.lir.LIRInstructionClass; 32 import org.graalvm.compiler.lir.Opcode; 33 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 34 35 import jdk.vm.ci.meta.Value; 36 37 /** 38 * Emits a breakpoint. 39 */ 40 @Opcode("BREAKPOINT") 41 public final class SPARCBreakpointOp extends SPARCLIRInstruction { 42 public static final LIRInstructionClass<SPARCBreakpointOp> TYPE = LIRInstructionClass.create(SPARCBreakpointOp.class); 43 public static final SizeEstimate SIZE = SizeEstimate.create(1); 44 45 // historical - from hotspot src/cpu/sparc/vm 46 // <sys/trap.h> promises that the system will not use traps 16-31 47 // We want to use ST_BREAKPOINT here, but the debugger is confused by it. 48 public static final int ST_RESERVED_FOR_USER_0 = 0x10; 49 50 /** 51 * A set of values loaded into the Java ABI parameter locations (for inspection by a debugger). 52 */ 53 @Use({REG, STACK}) protected Value[] parameters; 54 55 public SPARCBreakpointOp(Value[] parameters) { 56 super(TYPE, SIZE); 57 this.parameters = parameters; 58 } 59 60 @Override 61 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 62 masm.ta(ST_RESERVED_FOR_USER_0); 63 } 64 }