protected bool LoadElf( BinaryReader reader )
{
NativeElfEhdr ehdr = new NativeElfEhdr( reader );
if( ehdr.Magic != NativeElfEhdr.ElfMagic )
{
Debug.WriteLine( "ElfFile: elf magic number invalid" );
return false;
}
if( ehdr.Machine != ElfMachineMips )
{
Debug.WriteLine( "ElfFile: machine version invalid" );
return false;
}
_programType = ( ElfType )ehdr.Type;
_entryAddress = ehdr.Entry;
// Easy test for relocation:
if( _entryAddress < 0x08000000 )
_needsRelocation = true;
reader.BaseStream.Seek( ehdr.Phoff, SeekOrigin.Begin );
List<NativeElfPhdr> phdrs = new List<NativeElfPhdr>();
for( int n = 0; n < ehdr.Phnum; n++ )
{
NativeElfPhdr phdr = new NativeElfPhdr( reader );
phdrs.Add( phdr );
}
for( int n = 0; n < ehdr.Shnum; n++ )
{
reader.BaseStream.Seek( ehdr.Shoff + ( n * ehdr.Shentsize ), SeekOrigin.Begin );
NativeElfShdr shdr = new NativeElfShdr( reader );
ElfSection section = new ElfSection();
section.NameIndex = shdr.Name;
section.ElfOffset = shdr.Offset;
section.Flags = ( ElfSectionFlags )shdr.Flags;
section.LinkInfo = shdr.Info;
section.SectionType = ( ElfSectionType )shdr.Type;
section.Address = shdr.Address;
section.AddressAlignment = shdr.AddressAlignment;
section.Length = shdr.Size;
_sections.Add( section );
if( ( section.Flags & ElfSectionFlags.Alloc ) == ElfSectionFlags.Alloc )
_allocSections.Add( section );
if( ( ( _programType == ElfType.Executable ) &&
( section.SectionType == ElfSectionType.Relocation ) ) ||
( ( _programType == ElfType.Prx ) &&
( section.SectionType == ElfSectionType.PrxReloc ) ) )
_relocSections.Add( section );
}
uint nameBase = _sections[ ehdr.Shstrndx ].ElfOffset;
foreach( ElfSection section in _sections )
{
reader.BaseStream.Seek( nameBase + section.NameIndex, SeekOrigin.Begin );
section.Name = ReadString( reader );
if( ( ( section.SectionType == ElfSectionType.Relocation ) ||
( section.SectionType == ElfSectionType.PrxReloc ) ) &&
( ( _sections[ ( int )section.LinkInfo ].Flags & ElfSectionFlags.Alloc ) != 0 ) )
{
section.Reference = _sections[ ( int )section.LinkInfo ];
//_needsRelocation = true;
}
if( ( section.Name != null ) &&
( section.Name.Length > 0 ) )
_sectionLookup.Add( section.Name, section );
}
// Not sure if this is important
if( _sectionLookup.ContainsKey( ".init" ) == true )
_initAddress = _sectionLookup[ ".init" ].Address;
else
_initAddress = 0x0;
if( _sectionLookup.ContainsKey( ".symtab" ) == true )
{
ElfSection symtab = _sectionLookup[ ".symtab" ];
ElfSection strtab = _sectionLookup[ ".strtab" ];
for( int n = 0; n < symtab.Length / 16; n++ )
{
reader.BaseStream.Seek( symtab.ElfOffset + ( 16 * n ), SeekOrigin.Begin );
NativeElfSym sym = new NativeElfSym( reader );
ElfSymbol symbol = new ElfSymbol();
symbol.Index = sym.SectionIndex; // May be ElfAbsoluteSymbol
symbol.Size = sym.Size;
symbol.Value = sym.Value;
symbol.Binding = ( ElfSymbolBinding )( sym.Info >> 4 );
symbol.SymbolType = ( ElfSymbolType )( sym.Info & 0xF );
reader.BaseStream.Seek( strtab.ElfOffset + sym.Name, SeekOrigin.Begin );
symbol.Name = ReadString( reader );
_symbols.Add( symbol );
if( symbol.Index != ElfAbsoluteSymbol )
{
ElfSection symbolParent = _sections[ ( int )symbol.Index ];
List<ElfSymbol> syms;
if( _symbolLookup.ContainsKey( symbolParent ) == true )
syms = _symbolLookup[ symbolParent ];
else
{
syms = new List<ElfSymbol>();
_symbolLookup.Add( symbolParent, syms );
}
syms.Add( symbol );
}
}
}
//foreach( ElfSection section in _sections )
//{
// Debugger.Break();
// if( ( _programType == ElfType.Executable ) &&
// ( section.SectionType != ElfSectionType.Relocation ) )
// continue;
// if( ( _programType == ElfType.Prx ) &&
// ( section.SectionType != ElfSectionType.PrxReloc ) )
// continue;
// for( int n = 0; n < section.Length / 8; n++ )
// {
// reader.BaseStream.Seek( section.ElfOffset + ( 8 * n ), SeekOrigin.Begin );
// NativeElfRel rel = new NativeElfRel( reader );
// ElfRelocation relocation = new ElfRelocation();
// relocation.Section = section;
// relocation.Offset = rel.Offset;
// relocation.BaseAddress = ( rel.Info >> 16 ) & 0xFF;
// relocation.Symbol = rel.Info >> 8;
// relocation.RelocationType = ( ElfRelocationType )( byte )( rel.Info & 0xFF );
// _relocations.Add( relocation );
// }
//}
return true;
}
protected bool LoadElf(BinaryReader reader)
{
NativeElfEhdr ehdr = new NativeElfEhdr(reader);
if (ehdr.Magic != NativeElfEhdr.ElfMagic)
{
Debug.WriteLine("ElfFile: elf magic number invalid");
return(false);
}
if (ehdr.Machine != ElfMachineMips)
{
Debug.WriteLine("ElfFile: machine version invalid");
return(false);
}
_programType = ( ElfType )ehdr.Type;
_entryAddress = ehdr.Entry;
// Easy test for relocation:
if (_entryAddress < 0x08000000)
{
_needsRelocation = true;
}
reader.BaseStream.Seek(ehdr.Phoff, SeekOrigin.Begin);
List <NativeElfPhdr> phdrs = new List <NativeElfPhdr>();
for (int n = 0; n < ehdr.Phnum; n++)
{
NativeElfPhdr phdr = new NativeElfPhdr(reader);
phdrs.Add(phdr);
}
for (int n = 0; n < ehdr.Shnum; n++)
{
reader.BaseStream.Seek(ehdr.Shoff + (n * ehdr.Shentsize), SeekOrigin.Begin);
NativeElfShdr shdr = new NativeElfShdr(reader);
ElfSection section = new ElfSection();
section.NameIndex = shdr.Name;
section.ElfOffset = shdr.Offset;
section.Flags = ( ElfSectionFlags )shdr.Flags;
section.LinkInfo = shdr.Info;
section.SectionType = ( ElfSectionType )shdr.Type;
section.Address = shdr.Address;
section.AddressAlignment = shdr.AddressAlignment;
section.Length = shdr.Size;
_sections.Add(section);
if ((section.Flags & ElfSectionFlags.Alloc) == ElfSectionFlags.Alloc)
{
_allocSections.Add(section);
}
if (((_programType == ElfType.Executable) &&
(section.SectionType == ElfSectionType.Relocation)) ||
((_programType == ElfType.Prx) &&
(section.SectionType == ElfSectionType.PrxReloc)))
{
_relocSections.Add(section);
}
}
uint nameBase = _sections[ehdr.Shstrndx].ElfOffset;
foreach (ElfSection section in _sections)
{
reader.BaseStream.Seek(nameBase + section.NameIndex, SeekOrigin.Begin);
section.Name = ReadString(reader);
if (((section.SectionType == ElfSectionType.Relocation) ||
(section.SectionType == ElfSectionType.PrxReloc)) &&
((_sections[( int )section.LinkInfo].Flags & ElfSectionFlags.Alloc) != 0))
{
section.Reference = _sections[( int )section.LinkInfo];
//_needsRelocation = true;
}
if ((section.Name != null) &&
(section.Name.Length > 0))
{
_sectionLookup.Add(section.Name, section);
}
}
// Not sure if this is important
if (_sectionLookup.ContainsKey(".init") == true)
{
_initAddress = _sectionLookup[".init"].Address;
}
else
{
_initAddress = 0x0;
}
if (_sectionLookup.ContainsKey(".symtab") == true)
{
ElfSection symtab = _sectionLookup[".symtab"];
ElfSection strtab = _sectionLookup[".strtab"];
for (int n = 0; n < symtab.Length / 16; n++)
{
reader.BaseStream.Seek(symtab.ElfOffset + (16 * n), SeekOrigin.Begin);
NativeElfSym sym = new NativeElfSym(reader);
ElfSymbol symbol = new ElfSymbol();
symbol.Index = sym.SectionIndex; // May be ElfAbsoluteSymbol
symbol.Size = sym.Size;
symbol.Value = sym.Value;
symbol.Binding = ( ElfSymbolBinding )(sym.Info >> 4);
symbol.SymbolType = ( ElfSymbolType )(sym.Info & 0xF);
reader.BaseStream.Seek(strtab.ElfOffset + sym.Name, SeekOrigin.Begin);
symbol.Name = ReadString(reader);
_symbols.Add(symbol);
if (symbol.Index != ElfAbsoluteSymbol)
{
ElfSection symbolParent = _sections[( int )symbol.Index];
List <ElfSymbol> syms;
if (_symbolLookup.ContainsKey(symbolParent) == true)
{
syms = _symbolLookup[symbolParent];
}
else
{
syms = new List <ElfSymbol>();
_symbolLookup.Add(symbolParent, syms);
}
syms.Add(symbol);
}
}
}
//foreach( ElfSection section in _sections )
//{
// Debugger.Break();
// if( ( _programType == ElfType.Executable ) &&
// ( section.SectionType != ElfSectionType.Relocation ) )
// continue;
// if( ( _programType == ElfType.Prx ) &&
// ( section.SectionType != ElfSectionType.PrxReloc ) )
// continue;
// for( int n = 0; n < section.Length / 8; n++ )
// {
// reader.BaseStream.Seek( section.ElfOffset + ( 8 * n ), SeekOrigin.Begin );
// NativeElfRel rel = new NativeElfRel( reader );
// ElfRelocation relocation = new ElfRelocation();
// relocation.Section = section;
// relocation.Offset = rel.Offset;
// relocation.BaseAddress = ( rel.Info >> 16 ) & 0xFF;
// relocation.Symbol = rel.Info >> 8;
// relocation.RelocationType = ( ElfRelocationType )( byte )( rel.Info & 0xFF );
// _relocations.Add( relocation );
// }
//}
return(true);
}
