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Feature: add support for VAX a.out object files
Fix some incorrectly disassembled + rewritten VAX instructions.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
| <Import Project="$(ProjectDir)../../Drivers/CommonBuildProperties.items" /> | ||
| <PropertyGroup> | ||
| <TargetFramework>net6.0</TargetFramework> | ||
| <Nullable>enable</Nullable> | ||
| <GenerateAssemblyInfo>false</GenerateAssemblyInfo> | ||
| <RootNamespace>Reko.ImageLoaders.AOut</RootNamespace> | ||
| <AssemblyName>Reko.ImageLoaders.AOut</AssemblyName> | ||
| </PropertyGroup> | ||
|
|
||
| <ItemGroup> | ||
| <ProjectReference Include="../../Core/Core.csproj" /> | ||
| </ItemGroup> | ||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| using Reko.Core; | ||
| using Reko.Core.Configuration; | ||
| using Reko.Core.IO; | ||
| using Reko.Core.Loading; | ||
| using Reko.Core.Memory; | ||
| using Reko.Core.Services; | ||
| using System; | ||
| using System.Runtime.InteropServices; | ||
|
|
||
| namespace Reko.ImageLoaders.AOut | ||
| { | ||
| public class AOutLoader : ProgramImageLoader | ||
| { | ||
| public AOutLoader( | ||
| IServiceProvider services, | ||
| ImageLocation imageLocation, | ||
| byte[] bytes) | ||
| : base(services, imageLocation, bytes) | ||
| { | ||
| this.PreferredBaseAddress = Address.Ptr32(0x00000000); | ||
| } | ||
|
|
||
| public override Address PreferredBaseAddress { get; set; } | ||
|
|
||
| public override Program LoadProgram(Address? address) | ||
| { | ||
| ushort magic = ByteMemoryArea.ReadLeUInt16(base.RawImage, 0); | ||
| var cfgSvc = Services.RequireService<IConfigurationService>(); | ||
| if (magic == 0x010B) | ||
| { | ||
| var rdr = new ByteImageReader(RawImage); | ||
| var vaxHeader = rdr.ReadStruct<vax_header>(); | ||
| rdr.Offset = 0x400; | ||
| var textBytes = rdr.ReadBytes(vaxHeader.a_text); | ||
| var uAddrData = (uint) rdr.Offset; | ||
| var dataBytes = rdr.ReadBytes(vaxHeader.a_data); | ||
| var uAddrBss = (uint) rdr.Offset; | ||
| var bssBytes = new byte[vaxHeader.a_bss]; | ||
|
|
||
| var segmentMap = new SegmentMap( | ||
| Seg(".text", 0x400, textBytes, AccessMode.ReadExecute), | ||
| Seg(".data", uAddrData, dataBytes, AccessMode.ReadWrite), | ||
| Seg(".bss", uAddrBss, bssBytes, AccessMode.ReadWrite)); | ||
|
|
||
| var arch = cfgSvc.GetArchitecture("vax")!; | ||
|
|
||
| var uAddrEntry = vaxHeader.a_entry != 0 | ||
| ? vaxHeader.a_entry | ||
| : 0x404u; | ||
| var entry = ImageSymbol.Location(arch, Address.Ptr32(uAddrEntry)); // Entry point | ||
|
|
||
| var program = new Program( | ||
| new ProgramMemory(segmentMap), | ||
| arch, | ||
| new DefaultPlatform(Services, arch, "VAX Unix")); //$TODO: VaxVms platform | ||
| program.EntryPoints.Add(entry.Address, entry); | ||
|
|
||
| return program; | ||
| } | ||
|
|
||
| throw new NotSupportedException("This a.out variant is not supported yet."); | ||
| } | ||
|
|
||
| private static ImageSegment Seg(string segmentName, uint uAddr, byte[] bytes, AccessMode access) | ||
| { | ||
| var addr = Address.Ptr32(uAddr); | ||
| var mem = new ByteMemoryArea(addr, bytes); | ||
| var segment = new ImageSegment(segmentName, mem, access); | ||
| return segment; | ||
| } | ||
| } | ||
|
|
||
| [StructLayout(LayoutKind.Sequential, Pack = 1)] | ||
| [Endian(Endianness.LittleEndian)] | ||
|
|
||
| public struct vax_header | ||
| { | ||
| public uint a_magic; // Magic number | ||
| public uint a_text; // Size of text segment | ||
| public uint a_data; // Size of data segment | ||
| public uint a_bss; // Size of bss segment | ||
| public uint a_syms; // Size of symbol table | ||
| public uint a_entry; // Entry point | ||
| public uint a_trsize; // Size of text relocation | ||
| public uint a_drsize; // Size of data relocation | ||
| }; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| #region License | ||
| /* | ||
| * Copyright (C) 1999-2024 John Källén. | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2, or (at your option) | ||
| * any later version. | ||
| * | ||
| * This program 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 for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; see the file COPYING. If not, write to | ||
| * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| */ | ||
| #endregion | ||
|
|
||
| using System.Reflection; | ||
| using System.Runtime.CompilerServices; | ||
| using System.Runtime.InteropServices; | ||
|
|
||
| // General Information about an assembly is controlled through the following | ||
| // set of attributes. Change these attribute values to modify the information | ||
| // associated with an assembly. | ||
| [assembly: AssemblyTitle("a.out")] | ||
| [assembly: AssemblyDescription("Reko Decompiler support for the a.out executable file format.")] | ||
| [assembly: AssemblyConfiguration("")] | ||
| [assembly: AssemblyCompany(Reko.AssemblyMetadata.Company)] | ||
| [assembly: AssemblyProduct(Reko.AssemblyMetadata.Product)] | ||
| [assembly: AssemblyCopyright(Reko.AssemblyMetadata.Copyright)] | ||
| [assembly: AssemblyTrademark("")] | ||
| [assembly: AssemblyCulture("")] | ||
|
|
||
| // Setting ComVisible to false makes the types in this assembly not visible | ||
| // to COM components. If you need to access a type in this assembly from | ||
| // COM, set the ComVisible attribute to true on that type. | ||
| [assembly: ComVisible(false)] | ||
|
|
||
| [assembly: AssemblyVersion(Reko.AssemblyMetadata.AssemblyVersion)] | ||
| [assembly: AssemblyFileVersion(Reko.AssemblyMetadata.AssemblyFileVersion)] |
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