protected void EmitRelocation(LinkerSection linkerSection, Section section)
{
int count = 0;
foreach (var symbol in linkerSection.Symbols)
{
foreach (var patch in symbol.LinkRequests)
{
if (patch.ReferenceOffset != 0)
{
continue;
}
if (patch.LinkType == LinkType.Size)
{
continue;
}
var relocationEntry = new RelocationEntry()
{
RelocationType = ConvertType(patch.LinkType, linker.MachineType),
Symbol = symbolTableOffset[symbol],
Offset = (ulong)patch.PatchOffset,
};
relocationEntry.Write(linkerFormatType, writer);
count++;
}
section.Size = (uint)(count * RelocationEntry.GetEntrySize(linkerFormatType));
}
}
private void EmitRelocation(Section section, BinaryWriter writer)
{
int count = 0;
foreach (var symbol in linker.Symbols)
{
if (symbol.IsExternalSymbol)
{
continue;
}
foreach (var patch in symbol.LinkRequests)
{
if (patch.ReferenceOffset != 0)
{
continue;
}
if (patch.ReferenceSymbol.SectionKind != section.SectionKind)
{
continue;
}
if (patch.LinkType == LinkType.Size)
{
continue;
}
if (!patch.ReferenceSymbol.IsExternalSymbol) // FUTURE: include relocations for static symbols, if option selected
{
continue;
}
Debug.Assert(symbolTableOffset.ContainsKey(patch.ReferenceSymbol));
var relocationEntry = new RelocationEntry()
{
RelocationType = ConvertType(linker.MachineType, patch.LinkType, patch.PatchType),
Symbol = symbolTableOffset[patch.ReferenceSymbol],
Offset = (ulong)(symbol.SectionOffset + patch.PatchOffset),
};
relocationEntry.Write(linkerFormatType, writer);
count++;
}
section.Size = (uint)(count * RelocationEntry.GetEntrySize(linkerFormatType));
}
}
private Stream EmitRelocationSection(SectionKind kind)
{
var stream = new MemoryStream();
var writer = new BinaryWriter(stream);
foreach (var symbol in Linker.Symbols)
{
if (symbol.IsExternalSymbol)
{
continue;
}
foreach (var patch in symbol.LinkRequests)
{
if (patch.ReferenceOffset != 0)
{
continue;
}
if (patch.ReferenceSymbol.SectionKind != kind)
{
continue;
}
if (patch.LinkType == LinkType.Size)
{
continue;
}
if (!patch.ReferenceSymbol.IsExternalSymbol) // FUTURE: include relocations for static symbols, if option selected
{
continue;
}
var relocationEntry = new RelocationEntry()
{
RelocationType = ConvertType(MachineType, patch.LinkType, patch.PatchType),
Symbol = symbolTableOffset[patch.ReferenceSymbol],
Offset = (ulong)(symbol.SectionOffset + patch.PatchOffset),
};
relocationEntry.Write(LinkerFormatType, writer);
}
}
return(stream);
}
private void CreateRelocationSection(SectionKind kind, bool addend)
{
var relocationSection = new Section()
{
Name = (addend ? ".rela" : ".rel") + LinkerSectionNames[(int)kind],
Type = addend ? SectionType.RelocationA : SectionType.Relocation,
Link = symbolSection,
Info = GetSection(kind),
AddressAlignment = linker.SectionAlignment,
EntrySize = addend ? RelocationAddendEntry.GetEntrySize(linkerFormatType) : RelocationEntry.GetEntrySize(linkerFormatType),
EmitMethod = WriteRelocationSection
};
AddSection(relocationSection);
relocationSection.AddDependency(symbolSection);
relocationSection.AddDependency(GetSection(kind));
}
private void RegisterRelocationSection(SectionKind kind, bool addend)
{
var relocationSection = new Section()
{
Name = (addend ? ".rela" : ".rel") + SectionNames[(int)kind],
Type = addend ? SectionType.RelocationA : SectionType.Relocation,
Link = symbolSection,
Info = GetSection(kind),
EntrySize = addend ? RelocationAddendEntry.GetEntrySize(LinkerFormatType) : RelocationEntry.GetEntrySize(LinkerFormatType),
Emitter = () => { return(addend ? EmitRelocationAddendSection(kind) : EmitRelocationSection(kind)); }
};
RegisterSection(relocationSection);
relocationSection.AddDependency(symbolSection);
relocationSection.AddDependency(GetSection(kind));
}
