/// <summary>
/// Read the CodeView subsection directory
/// </summary>
/// https://github.com/JWasm/JWasm/blob/master/dbgcv.c
public static List <Subsection> ReadSubsectionDirectory(LeImageReader fp, int dlfaBase)
{
// get number of subsections
var cdnt = fp.ReadLeUInt16();
var subsecs = new List <Subsection>();
foreach (var i in Enumerable.Range(0, cdnt))
{
// read subsection headers
var usst = fp.ReadLeUInt16();
var module = fp.ReadLeUInt16();
var lfoStart = fp.ReadLeInt32();
var cb = fp.ReadLeUInt16();
// read subsection data
var rdr = new LeImageReader(fp.Bytes, (uint)(lfoStart + dlfaBase));
var data = rdr.ReadBytes(cb);
var sst = (SST)usst;
// mash the subsection into one
var FACTORY = new Dictionary <SST, Func <SST, ushort, byte[], Subsection> >
{
{ SST.SST_MODULES, (s, m, d) => new sstModules(s, m, d) },
{ SST.SST_PUBLICS, (s, m, d) => new sstPublics(s, m, d) },
{ SST.SST_TYPE, (s, m, d) => new CodeViewTypes(s, m, d) }
};
if (FACTORY.ContainsKey(sst))
{
subsecs.Add(FACTORY[sst](sst, module, data));
}
else
{
subsecs.Add(new Subsection(sst, module, data));
}
}
return(subsecs);
}
public void ApplyRelocations(uint rvaReloc, uint size, uint baseOfImage, RelocationDictionary relocations)
{
ImageReader rdr = new LeImageReader(RawImage, rvaReloc);
uint rvaStop = rvaReloc + size;
while (rdr.Offset < rvaStop)
{
// Read fixup block header.
uint page = rdr.ReadLeUInt32();
int cbBlock = rdr.ReadLeInt32();
if (page == 0 || cbBlock == 0)
{
break;
}
uint offBlockEnd = (uint)((int)rdr.Offset + cbBlock - 8);
while (rdr.Offset < offBlockEnd)
{
ApplyRelocation(baseOfImage, page, rdr, relocations);
}
}
}
