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Code Issues Releases Activity

fix float

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bird_egop 2025-04-13 00:21:01 +03:00
parent 016e1ee54f
commit 7063a4a5a8
4 changed files with 77 additions and 67 deletions
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4
X86Disassembler/PE/PEFormat.cs → X86Disassembler/PE/PeFile.cs
View File

@ -5,7 +5,7 @@ namespace X86Disassembler.PE;
/// <summary>
/// Represents a Portable Executable (PE) file format parser
/// </summary>
public class PEFormat
public class PeFile
{
// DOS Header constants
private const ushort DOS_SIGNATURE = 0x5A4D; // 'MZ'
@ -66,7 +66,7 @@ public class PEFormat
/// Initializes a new instance of the PEFormat class
/// </summary>
/// <param name="fileData">The raw file data</param>
public PEFormat(byte[] fileData)
public PeFile(byte[] fileData)
{
_fileData = fileData;
SectionHeaders = new List<SectionHeader>();

131
X86Disassembler/Program.cs
View File

@ -32,75 +32,28 @@ public class Program
// Parse the PE format
Console.WriteLine("Parsing PE format...\n");
PEFormat peFormat = new PEFormat(fileBytes);
peFormat.Parse();
PeFile peFile = new PeFile(fileBytes);
peFile.Parse();
// Print PE file information
Console.WriteLine("PE File Information:");
Console.WriteLine($"Architecture: {(peFormat.OptionalHeader.Is64Bit() ? "64-bit" : "32-bit")}");
Console.WriteLine($"Entry Point: 0x{peFormat.OptionalHeader.AddressOfEntryPoint:X8}");
Console.WriteLine($"Image Base: 0x{peFormat.OptionalHeader.ImageBase:X8}");
Console.WriteLine($"Number of Sections: {peFormat.FileHeader.NumberOfSections}");
Console.WriteLine($"Architecture: {(peFile.OptionalHeader.Is64Bit() ? "64-bit" : "32-bit")}");
Console.WriteLine($"Entry Point: 0x{peFile.OptionalHeader.AddressOfEntryPoint:X8}");
Console.WriteLine($"Image Base: 0x{peFile.OptionalHeader.ImageBase:X8}");
Console.WriteLine($"Number of Sections: {peFile.FileHeader.NumberOfSections}");
Console.WriteLine();
// Print section information
Console.WriteLine("Sections:");
foreach (var section in peFormat.SectionHeaders)
{
string flags = "";
if (section.ContainsCode()) flags += "Code ";
if (section.IsExecutable()) flags += "Exec ";
if (section.IsReadable()) flags += "Read ";
if (section.IsWritable()) flags += "Write";
Console.WriteLine($" {peFormat.SectionHeaders.IndexOf(section)}: {section.Name,-8} VA=0x{section.VirtualAddress:X8} Size={section.VirtualSize,-8} [{flags}]");
}
Console.WriteLine();
PrintPeSections(peFile);
// Print export information
if (peFormat.ExportDirectory != null)
{
Console.WriteLine("Exported Functions:");
Console.WriteLine($"DLL Name: {peFormat.ExportDirectory.DllName}");
Console.WriteLine($"Number of Functions: {peFormat.ExportDirectory.NumberOfFunctions}");
Console.WriteLine($"Number of Names: {peFormat.ExportDirectory.NumberOfNames}");
for (int i = 0; i < peFormat.ExportedFunctions.Count; i++)
{
var export = peFormat.ExportedFunctions[i];
Console.WriteLine($" {i}: {export.Name} (Ordinal={export.Ordinal}, RVA=0x{export.AddressRva:X8})");
}
Console.WriteLine();
}
PrintPeExports(peFile);
// Print import information
if (peFormat.ImportDescriptors.Count > 0)
{
Console.WriteLine("Imported Functions:");
Console.WriteLine($"Number of Imported DLLs: {peFormat.ImportDescriptors.Count}");
foreach (var import in peFormat.ImportDescriptors)
{
Console.WriteLine($" DLL: {import.DllName}");
for (int i = 0; i < import.Functions.Count; i++)
{
var function = import.Functions[i];
if (function.IsOrdinal)
{
Console.WriteLine($" {i}: Ordinal {function.Ordinal}");
}
else
{
Console.WriteLine($" {i}: {function.Name} (Hint={function.Hint})");
}
}
}
Console.WriteLine();
}
PrintPeImports(peFile);
// Find code sections
var codeSections = peFormat.SectionHeaders.FindAll(s => s.ContainsCode());
var codeSections = peFile.SectionHeaders.FindAll(s => s.ContainsCode());
Console.WriteLine($"Found {codeSections.Count} code section(s):");
foreach (var section in codeSections)
{
@ -112,7 +65,7 @@ public class Program
if (codeSections.Count > 0)
{
var section = codeSections[0];
byte[] codeBytes = peFormat.GetSectionData(peFormat.SectionHeaders.IndexOf(section));
byte[] codeBytes = peFile.GetSectionData(peFile.SectionHeaders.IndexOf(section));
Console.WriteLine($"Disassembling section {section.Name} at RVA 0x{section.VirtualAddress:X8}:");
@ -132,11 +85,67 @@ public class Program
// Print a summary of how many more instructions there are
if (instructions.Count > count)
{
Console.WriteLine($"... ({instructions.Count - count} more bytes not shown)");
Console.WriteLine($"... ({instructions.Count - count} more instructions not shown)");
}
}
Console.WriteLine("\nPress Enter to exit...");
Console.ReadLine();
// Console.WriteLine("\nPress Enter to exit...");
// Console.ReadLine();
}
private static void PrintPeImports(PeFile peFile)
{
Console.WriteLine("Imported Functions:");
Console.WriteLine($"Number of Imported DLLs: {peFile.ImportDescriptors.Count}");
foreach (var import in peFile.ImportDescriptors)
{
Console.WriteLine($" DLL: {import.DllName}");
for (int i = 0; i < import.Functions.Count; i++)
{
var function = import.Functions[i];
if (function.IsOrdinal)
{
Console.WriteLine($" {i}: Ordinal {function.Ordinal}");
}
else
{
Console.WriteLine($" {i}: {function.Name} (Hint={function.Hint})");
}
}
}
Console.WriteLine();
}
private static void PrintPeExports(PeFile peFile)
{
Console.WriteLine("Exported Functions:");
Console.WriteLine($"DLL Name: {peFile.ExportDirectory.DllName}");
Console.WriteLine($"Number of Functions: {peFile.ExportDirectory.NumberOfFunctions}");
Console.WriteLine($"Number of Names: {peFile.ExportDirectory.NumberOfNames}");
for (int i = 0; i < peFile.ExportedFunctions.Count; i++)
{
var export = peFile.ExportedFunctions[i];
Console.WriteLine($" {i}: {export.Name} (Ordinal={export.Ordinal}, RVA=0x{export.AddressRva:X8})");
}
Console.WriteLine();
}
private static void PrintPeSections(PeFile peFile)
{
Console.WriteLine("Sections:");
foreach (var section in peFile.SectionHeaders)
{
string flags = "";
if (section.ContainsCode()) flags += "Code ";
if (section.IsExecutable()) flags += "Exec ";
if (section.IsReadable()) flags += "Read ";
if (section.IsWritable()) flags += "Write";
Console.WriteLine($" {peFile.SectionHeaders.IndexOf(section)}: {section.Name,-8} VA=0x{section.VirtualAddress:X8} Size={section.VirtualSize,-8} [{flags}]");
}
Console.WriteLine();
}
}

3
X86Disassembler/X86/Handlers/FloatingPoint/LoadStoreFloat64Handler.cs
View File

@ -13,8 +13,9 @@ public class LoadStoreFloat64Handler : FloatingPointBaseHandler
"fst",
"fstp",
"frstor",
"??",
"fnsave",
"fnstsw"
"fnstsw",
];
/// <summary>

2
X86Disassembler/X86/OpcodeMap.cs
View File

@ -126,6 +126,6 @@ public static class OpcodeMap
/// <returns>The mnemonic</returns>
public static string GetMnemonic(byte opcode)
{
return OneByteOpcodes[opcode];
return "TODO UNKNOWN: " + OneByteOpcodes[opcode];
}
}