private void PatchRELEntries(byte[] File_Buffer)
{
List <Relocation_Entry> Relocation_Entries_List = new List <Relocation_Entry>();
List <string> Relocated_Output = new List <string>();
for (int i = 0; i < Import_Entries.Length; i++)
{
Import_Entry Current_Import_Entry = Import_Entries[i];
uint Current_Section = 0;
uint Current_Offset = 0;
uint Value = 0;
uint Where = 0;
uint Orig = 0;
int Index = 0;
if (Current_Import_Entry.Module_Id == Header.Id) // These relocations are inside our own file
{
while (true)
{
int Rel_Offset = (int)(Current_Import_Entry.Offset + Index * 8);
Relocation_Entry Entry = new Relocation_Entry(BitConverter.ToUInt16(File_Buffer, Rel_Offset).Reverse(),
File_Buffer[Rel_Offset + 2], File_Buffer[Rel_Offset + 3], BitConverter.ToUInt32(File_Buffer, Rel_Offset + 4).Reverse());
Relocation_Entries_List.Add(Entry);
//Debug.WriteLine(Entry.Offset.ToString("X4") + " | " + Entry.Type_Value.ToString());
if (Entry.IsEnd())
{
break;
}
Current_Offset += Entry.Offset;
uint OverwriteAddress = 0;
uint OverwriteValue = 0;
switch (Entry.Type)
{
case RelocationType.R_DOLPHIN_SECTION:
Current_Section = Entry.Section;
Current_Offset = 0;
//Debug.WriteLine("DOLPHIN_SECTION Set Section to " + Current_Section);
//Relocated_Output.Add("DOLPHIN_SECTION Set Section to " + Current_Section);
break;
case RelocationType.R_DOLPHIN_NOP:
break;
case RelocationType.R_PPC_ADDR32:
OverwriteAddress = GetSectionAddress(Current_Section, Current_Offset);
OverwriteValue = GetSectionAddress(Entry.Section, Entry.Addend);
//Debug.WriteLine(string.Format("ADDR32 Offset 0x{0} had its value patched to address 0x{1}", OverwriteAddress.ToString("X"), OverwriteValue.ToString("X")));
//Relocated_Output.Add(string.Format("ADDR32 Offset 0x{0} had its value patched to address 0x{1}", OverwriteAddress.ToString("X"), OverwriteValue.ToString("X")));
break;
case RelocationType.R_PPC_ADDR16_LO:
OverwriteAddress = GetSectionAddress(Current_Section, Current_Offset);
OverwriteValue = GetSectionAddress(Entry.Section, Entry.Addend) & 0xFFFF;
//Debug.WriteLine(string.Format("ADDR16_LO Offset 0x{0} had its value patched to address 0x{1}", OverwriteAddress.ToString("X"), OverwriteValue.ToString("X")));
//Relocated_Output.Add(string.Format("ADDR16_LO Offset 0x{0} had its value patched to address 0x{1}", OverwriteAddress.ToString("X"), OverwriteValue.ToString("X")));
break;
case RelocationType.R_PPC_ADDR16_HA:
OverwriteAddress = GetSectionAddress(Current_Section, Current_Offset);
OverwriteValue = GetSectionAddress(Entry.Section, Entry.Addend);
if ((OverwriteValue & 0x8000) == 0x8000)
{
OverwriteValue += 0x00010000;
}
//OverwriteValue += 0x80000000;
OverwriteValue = (OverwriteValue >> 16) & 0xFFFF;
//Debug.WriteLine(string.Format("ADDR16_HA Offset 0x{0} had its value patched to address 0x{1}", OverwriteAddress.ToString("X"), OverwriteValue.ToString("X")));
//Relocated_Output.Add(string.Format("ADDR16_HA Offset 0x{0} had its value patched to address 0x{1}", OverwriteAddress.ToString("X"), OverwriteValue.ToString("X")));
break;
case RelocationType.R_PPC_REL24:
Where = GetSectionAddress(Current_Section, Current_Offset);
Value = GetSectionAddress(Entry.Section, Entry.Addend);
Value -= Where;
Orig = BitConverter.ToUInt32(File_Buffer, (int)Where).Reverse();
Orig &= 0xFC000003;
Orig |= Value & 0x03FFFFFC;
//Debug.WriteLine("REL24 Offset 0x{0} is now 0x{1}", Where.ToString("X"), Orig.ToString("X"));
//Relocated_Output.Add(string.Format("REL24 Offset 0x{0} is now 0x{1}", Where.ToString("X"), Orig.ToString("X")));
break;
default:
Debug.WriteLine(string.Format("Unsupported Relocation Type: {0}", Entry.Type));
break;
}
Index++;
}
}
else // Move on to external relocations
{
/*while (true)
* {
* int Rel_Offset = (int)(Current_Import_Entry.Offset + Index * 8);
* Relocation_Entry Entry = new Relocation_Entry(BitConverter.ToUInt16(File_Buffer.Skip(Rel_Offset).Take(2).Reverse().ToArray(), 0),
* File_Buffer[Rel_Offset + 2], File_Buffer[Rel_Offset + 3], BitConverter.ToUInt32(File_Buffer.Skip(Rel_Offset + 4).Take(4).Reverse().ToArray(), 0));
* Relocation_Entries_List.Add(Entry);
*
* if (Entry.IsEnd())
* break;
*
* //if (Entry.Type == RelocationType.R_DOLPHIN_SECTION || Entry.Type == RelocationType.R_DOLPHIN_NOP)
* //Debug.WriteLine("Extenral Entry called an unneeded opcode: " + Entry.Type.ToString());
*
* Index++;
* }*/
}
}
using (TextWriter Writer = File.CreateText(Path.GetDirectoryName(Location) + "\\Relocation_Output.txt"))
{
foreach (string s in Relocated_Output)
{
Writer.WriteLine(s);
}
Writer.Flush();
}
}
public REL(byte[] Rel_Buffer, string Rel_Location, bool Load_Externals = true)
{
Debug.WriteLine(string.Format("============= Loading REL {0} =============", Path.GetFileNameWithoutExtension(Rel_Location)));
Header = new REL_Header(Rel_Buffer);
Location = Rel_Location;
// Load Section Entries
Section_Entries = new Section_Entry[Header.Section_Count];
for (int i = 0; i < Header.Section_Count; i++)
{
int Section_Offset = (int)(Header.Section_Table_Offset + i * 8);
if (Section_Offset >= Rel_Buffer.Length)
{
Debug.WriteLine(string.Format("Section {0} could not be loaded as the file ended while parsing it!", i));
continue;
}
Section_Entry Entry = new Section_Entry(BitConverter.ToUInt32(Rel_Buffer, Section_Offset).Reverse(),
BitConverter.ToUInt32(Rel_Buffer, Section_Offset + 4).Reverse());
// Sanity Checks
if (Entry.Offset == 0 && Entry.Size != 0) // .bss Section
{
// Set .bss offset
if (i > 0)
{
Entry.Offset = Section_Entries[i - 1].Offset + Section_Entries[i - 1].Size;
}
if (Entry.Size != Header.BSS_Size)
{
Debug.WriteLine(string.Format("Section {0} seems to be the .bss section, but its size does not match the header's size. This size: 0x{1} | Header size: 0x{2}",
i, Entry.Size.ToString("X"), Header.BSS_Size.ToString("X")));
}
else if (Entry.Offset == Header.Import_Offset || Entry.Offset == Header.Relocation_Offset)
{
Debug.WriteLine(string.Format("Section {0} seemst o be the .bss section, but it overlaps with the import or relocation section. It's likely not in the file.",
i));
}
else
{
Debug.WriteLine(string.Format("Successfully loaded the .bss Section: {0} | Offset: {1} | Size: {2}", i, Entry.Offset.ToString("X"), Entry.Size.ToString("X")));
}
}
else if (Entry.Offset != 0 && Entry.Size != 0)
{
if (Entry.Offset < Header.GetHeaderSize())
{
Debug.WriteLine("Section {0} seems to be inside the REL header! Offset: 0x{1} | Expected Minimum Offset: 0x{2}", i, Entry.Offset.ToString("X"),
Header.GetHeaderSize().ToString("X"));
}
else if (Entry.Offset + Entry.Size >= Rel_Buffer.Length)
{
Debug.WriteLine("Section {0} seems to go past the end of the file! End Offset: 0x{1} | Maximum End Offset: 0x{2}", i,
(Entry.Offset + Entry.Size).ToString("X"), Rel_Buffer.Length.ToString("X"));
}
else
{
Debug.WriteLine(string.Format("Successfully loaded Section {0}! Offset: 0x{1} | Size: 0x{2} | End Offset: 0x{3}",
i, Entry.Offset.ToString("X"), Entry.Size.ToString("X"), (Entry.Offset + Entry.Size).ToString("X")));
}
}
else
{
Debug.WriteLine(string.Format("Section {0} has a zeroed Offset and Size! It's probably an unused section.", i));
}
//Debug.WriteLine(string.Format("Added section #{0} with a start address of 0x{1}", i, Entry.Offset.ToString("X8")));
Section_Entries[i] = Entry;
}
// Load Import Table Entries
LoadModuleNames(Rel_Location, Load_Externals);
int Import_Table_Count = (int)(Header.Import_Size / 8); //(int)(Header.Relocation_Offset - Header.Import_Offset) / 8;
Import_Entries = new Import_Entry[Import_Table_Count];
for (int i = 0; i < Import_Table_Count; i++)
{
int Current_Offset = (int)(Header.Import_Offset + i * 8);
uint Id = BitConverter.ToUInt32(Rel_Buffer, Current_Offset).Reverse();
Import_Entries[i] = new Import_Entry(Id,
BitConverter.ToUInt32(Rel_Buffer, Current_Offset + 4).Reverse(), Module_Names.ContainsKey(Id) ? Module_Names[Id] : null);
}
// Load and Patch Relocation Table Entries
//PatchRELEntries(Rel_Buffer);
}
