private void Given_Variable_Length_Symbol(string str)
{
var ab = Encoding.ASCII.GetBytes(str);
if (ab.Length < 0x20)
{
w.WriteByte((byte)(0x80 + ab.Length));
}
else
{
w.WriteByte(0x80);
w.WriteByte((byte)ab.Length);
}
w.WriteBytes(ab);
if ((w.Position & 1) == 1)
{
w.WriteByte(0x00);
}
}
private static void WriteString(string s, BeImageWriter w)
{
if (s.Length <= 0)
{
w.WriteBeUInt32(0);
return;
}
byte[] ab = enc.GetBytes(s);
int padLength = (ab.Length + 3) & ~3;
w.WriteBeUInt32((uint)padLength / 4);
w.WriteBytes(ab);
int cPad = padLength - ab.Length;
while (--cPad >= 0)
{
w.WriteByte(0);
}
}
protected void BuildObjectFile32()
{
// Add symbol table
if (symbols.Count > 0)
{
Given_Section(".symtab", SectionHeaderType.SHT_SYMTAB, ElfLoader.SHF_ALLOC, FlattenSymbolTable());
var os = objectSections[objectSections.Count - 1];
os.ElementSize = Elf32_Sym.Size;
os.Link = (ushort)objectSections.Count;
Given_Section(".strtab", SectionHeaderType.SHT_STRTAB, ElfLoader.SHF_ALLOC, symbolStringtab.ToArray());
}
var bin = new BeImageWriter();
bin.WriteByte(0x7F);
bin.WriteBytes(new byte[] { 0x45, 0x4C, 0x46 });
bin.WriteByte(1); // 32-bit
bin.WriteByte(2); // big-endian
bin.WriteByte(1); // ELF version
bin.WriteByte(0); // OS ABI
bin.WriteByte(0); // OS version
bin.WriteBytes(0, 7); // pad
// ELF header
bin.WriteBeUInt16(1); // relocatable
bin.WriteBeUInt16((ushort)ElfMachine.EM_SPARC);
bin.WriteBeUInt32(1); // version
bin.WriteBeUInt32(0); // entry point (none in reloc file)
bin.WriteBeUInt32(0); // program segment table offset (none in reloc file)
bin.WriteBeUInt32((uint)bin.Position + 20); // point to section table.
bin.WriteBeUInt32(0); // e_flags;
bin.WriteBeUInt16(0); // e_ehsize;
bin.WriteBeUInt16((ushort)Elf32_PHdr.Size); // e_phentsize;
bin.WriteBeUInt16((ushort)progHeaders.Count); // e_phnum;
bin.WriteBeUInt16(0); // e_shentsize;
bin.WriteBeUInt16((ushort)objectSections.Count); // e_shnum;
bin.WriteBeUInt16(1); // e_shstrndx;
// Build string table.
var strtab = new MemoryStream();
var mpOsToiName = new Dictionary <ObjectSection, int>();
foreach (var os in this.objectSections)
{
mpOsToiName[os] = (int)strtab.Position;
var bytes = Encoding.ASCII.GetBytes(os.Name);
strtab.Write(bytes, 0, bytes.Length);
strtab.WriteByte(0);
}
// Reserve space for program header table and
// section table.
var iProgHdrTable = (uint)bin.Position;
var iShTable = (uint)bin.Position + (uint)(progHeaders.Count * Elf32_PHdr.Size);
var iStrTable = iShTable + (uint)(40 * objectSections.Count);
// Write string table
var aStrtable = strtab.ToArray();
objectSections[1].Content = aStrtable;
var iContent = iStrTable;
// Place remaining sections.
foreach (var section in objectSections.Skip(1))
{
section.Offset = iContent;
iContent = Align((uint)(iContent + section.Content.Length));
}
// Write the program header table
foreach (var ph in this.progHeaders)
{
bin.WriteBeUInt32((uint)ph.Type);
bin.WriteBeUInt32(ph.Offset);
bin.WriteBeUInt32(ph.VirtualAddress);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32((uint)ph.Content.Length);
bin.WriteBeUInt32(ph.AllocateSize);
bin.WriteBeUInt32(ph.Flags);
bin.WriteBeUInt32(ph.Alignment);
}
// Write the section table.
foreach (var os in this.objectSections)
{
bin.WriteBeUInt32((uint)mpOsToiName[os]);
bin.WriteBeUInt32((uint)os.Type);
bin.WriteBeUInt32(os.Flags);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32(os.Offset);
bin.WriteBeUInt32(os.Content != null ? (uint)os.Content.Length : 0u);
bin.WriteBeUInt32(os.Link);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32(os.ElementSize);
}
// write the non-null sections.
foreach (var section in objectSections.Skip(1))
{
bin.WriteBytes(section.Content);
Align(bin);
}
this.rawBytes = bin.ToArray();
}
