protected void DumpRela64(ElfLoader64 loader)
{
foreach (var section in loader.Sections.Where(s =>
s.Type == SectionHeaderType.SHT_RELA &&
s.LinkedSection != null &&
s.LinkedSection.FileOffset != 0))
{
Debug.Print("RELA: offset {0:X} symbol section {1}, relocating in section {2}",
section.FileOffset,
section.LinkedSection.Name,
section.RelocatedSection.Name);
var symbols = loader.Symbols[section.LinkedSection.FileOffset];
var rdr = loader.CreateReader(section.FileOffset);
for (uint i = 0; i < section.EntryCount(); ++i)
{
var rela = Elf64_Rela.Read(rdr);
Debug.Print(" off:{0:X16} type:{1,-16} add:{3,-20} {4,3} {2}",
rela.r_offset,
RelocationTypeToString((uint)rela.r_info),
symbols[(int)(rela.r_info >> 32)].Name,
rela.r_addend,
(int)(rela.r_info >> 32));
}
}
}
private void LoadImportReferencesFromRelaPlt()
{
var rela_plt = loader.GetSectionInfoByName(".rela.plt");
var plt = loader.GetSectionInfoByName(".plt");
var relaRdr = loader.CreateReader(rela_plt.FileOffset);
for (ulong i = 0; i < rela_plt.EntryCount(); ++i)
{
// Read the .rela.plt entry
ulong offset;
if (!relaRdr.TryReadUInt64(out offset))
{
return;
}
ulong info;
if (!relaRdr.TryReadUInt64(out info))
{
return;
}
long addend;
if (!relaRdr.TryReadInt64(out addend))
{
return;
}
ulong sym = info >> 32;
string symStr = loader.GetSymbol64(rela_plt.LinkedSection, sym);
var addr = plt.Address + (uint)(i + 1) * plt.EntrySize;
importReferences.Add(
addr,
new NamedImportReference(addr, null, symStr));
}
}
public override void Relocate(Program program)
{
DumpRela64(loader);
foreach (var relSection in loader.Sections.Where(s => s.Type == SectionHeaderType.SHT_RELA))
{
var symbols = loader.Symbols[relSection.LinkedSection];
var referringSection = relSection.RelocatedSection;
var rdr = loader.CreateReader(relSection.FileOffset);
for (uint i = 0; i < relSection.EntryCount(); ++i)
{
var rela = Elf64_Rela.Read(rdr);
var sym = symbols[(int)(rela.r_info >> 32)];
RelocateEntry(program, sym, referringSection, rela);
}
}
}
public override void Relocate(Program program)
{
DumpRela64(loader);
var syms = RelocateDynamicSymbols(program);
if (syms != null)
{
return;
}
foreach (var relSection in loader.Sections.Where(s => s.Type == SectionHeaderType.SHT_RELA))
{
var symbols = loader.Symbols[relSection.LinkedSection.FileOffset];
var referringSection = relSection.RelocatedSection;
var rdr = loader.CreateReader(relSection.FileOffset);
for (uint i = 0; i < relSection.EntryCount(); ++i)
{
var rela = loader.LoadRelaEntry(rdr);
var sym = symbols[rela.SymbolIndex];
RelocateEntry(program, sym, referringSection, rela);
}
}
}
protected void DumpRela64(ElfLoader64 loader)
{
foreach (var section in loader.Sections.Where(s => s.Type == SectionHeaderType.SHT_RELA))
{
Debug.Print("RELA: offset {0:X} symbol section {1}, relocating in section {2}",
section.FileOffset,
section.LinkedSection.Name,
section.RelocatedSection.Name);
var symbols = loader.Symbols[section.LinkedSection];
var rdr = loader.CreateReader(section.FileOffset);
for (uint i = 0; i < section.EntryCount(); ++i)
{
var rela = Elf64_Rela.Read(rdr);
Debug.Print(" off:{0:X16} type:{1,-16} add:{3,-20} {4,3} {2}",
rela.r_offset,
RelocationTypeToString((uint)rela.r_info),
symbols[(int)(rela.r_info >> 32)].Name,
rela.r_addend,
(int)(rela.r_info >> 32));
}
}
}
