mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-23 06:18:54 +00:00
61 lines
No EOL
2.3 KiB
C#
61 lines
No EOL
2.3 KiB
C#
using System;
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using System.Linq;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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using CPU = Indy.IL2CPU.Assembler;
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using CPUx86 = Indy.IL2CPU.Assembler.X86;
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namespace Indy.IL2CPU.IL.X86 {
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[OpCode(Code.Callvirt, true)]
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public class Callvirt: Op {
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private int mMethodIdentifier;
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private bool mHasReturn;
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private string mNormalAddress;
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private string mMethodDescription;
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private string[] mThisAddresses;
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public Callvirt(Instruction aInstruction, MethodInformation aMethodInfo)
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: base(aInstruction, aMethodInfo) {
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int xThisOffSet = (from item in aMethodInfo.Locals
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select item.Offset + item.Size).LastOrDefault();
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MethodReference xMethod = aInstruction.Operand as MethodReference;
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if (xMethod == null) {
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throw new Exception("Unable to determine Method!");
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}
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MethodDefinition xMethodDef = Engine.GetDefinitionFromMethodReference(xMethod);
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mMethodDescription = new CPU.Label(xMethodDef).Name;
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if (xMethodDef.IsStatic || !xMethodDef.IsVirtual) {
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mNormalAddress = new CPU.Label(xMethod).Name;
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mHasReturn = !xMethod.ReturnType.ReturnType.FullName.StartsWith("System.Void");
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return;
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}
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mMethodIdentifier = Engine.GetMethodIdentifier(xMethodDef);
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Engine.QueueMethodRef(VTablesImplRefs.GetMethodAddressForTypeRef);
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MethodInformation xTheMethodInfo = Engine.GetMethodInfo(xMethodDef, xMethodDef, mMethodDescription, null);
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mHasReturn = xTheMethodInfo.ReturnSize != 0;
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Console.WriteLine("Debug: " + xTheMethodInfo.ToString());
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mThisAddresses = xTheMethodInfo.Arguments[0].VirtualAddresses;
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if (mThisAddresses.Length > 1) {
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throw new Exception("In x86, object addresses are 4 bytes. Found different size!");
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}
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}
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public override void DoAssemble() {
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if (!String.IsNullOrEmpty(mNormalAddress)) {
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Call(mNormalAddress);
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} else {
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if (Assembler.InMetalMode) {
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throw new Exception("Virtual methods not supported in Metal mode! (Called method = '" + mMethodDescription + "')");
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}
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Assembler.Add(new CPUx86.Pop("eax"));
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Assembler.Add(new CPUx86.Pushd("eax"));
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Assembler.Add(new CPUx86.Pushd("[eax]"));
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Assembler.Add(new CPUx86.Pushd("0" + mMethodIdentifier.ToString("X") + "h"));
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Call(new CPU.Label(VTablesImplRefs.GetMethodAddressForTypeRef).Name);
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Call("eax");
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}
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if (mHasReturn) {
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Pushd(4, "eax");
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}
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}
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}
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} |