//- reading in ----------------------------------------------------------------
public static CoffSection readSection(BinaryIn source)
{
string name = source.getAsciiString(8);
CoffSection sec = new CoffSection(name);
sec.memSize = source.getFour();
sec.memPos = source.getFour();
sec.fileSize = source.getFour();
sec.filePos = source.getFour();
sec.relocTblPos = source.getFour();
uint skip1 = source.getFour(); //line numbers are deprecated
sec.relocTblCount = source.getTwo();
uint skip2 = source.getTwo();
uint flagval = source.getFour();
sec.settings = SectionSettings.decodeFlags(flagval);
uint mark = source.getPos();
source.seek(sec.filePos);
byte[] secdata = source.getRange(sec.fileSize);
sec.data = new List <byte>(secdata);
source.seek(mark);
return(sec);
}
//new section cons
public CoffSection(String _name)
{
secNum = 0;
name = _name;
memSize = 0;
memPos = 0;
fileSize = 0;
filePos = 0;
settings = new SectionSettings();
relocations = new List <CoffRelocation>();
data = new List <byte>();
relocTblPos = 0;
relocTblCount = 0;
}
internal static SectionSettings decodeFlags(uint flags)
{
SectionSettings settings = new SectionSettings();
settings.hasCode = (flags & 0x20) != 0;
settings.hasInitData = (flags & 0x40) != 0;
settings.hasUninitData = (flags & 0x80) != 0;
settings.hasInfo = (flags & 0x200) != 0;
settings.willRemove = (flags & 0x800) != 0;
settings.hasComdat = (flags & 0x1000) != 0;
settings.hasGPRel = (flags & 0x8000) != 0;
settings.hasExtRelocs = (flags & 0x01000000) != 0;
settings.canDiscard = (flags & 0x02000000) != 0;
settings.dontCache = (flags & 0x04000000) != 0;
settings.notPageable = (flags & 0x08000000) != 0;
settings.canShare = (flags & 0x10000000) != 0;
settings.canExecute = (flags & 0x20000000) != 0;
settings.canRead = (flags & 0x40000000) != 0;
settings.canWrite = (flags & 0x80000000) != 0;
settings.dataAlignment = DATAALIGNMENTS[(flags & 0x00F00000) >> 20];
return(settings);
}
public CoffSection(String _name, SectionSettings _settings)
: this(_name)
{
settings = _settings;
}
public static Win32Obj readFromFile(String filename)
{
Win32Obj objfile = new Win32Obj(filename);
BinaryIn source = new BinaryIn(filename);
//coff header
objfile.machine = (MachineType)source.getTwo();
uint sectionCount = source.getTwo();
objfile.timeStamp = source.getFour();
uint symbolTblAddr = source.getFour();
uint symbolCount = source.getFour();
uint optionalHdrSize = source.getTwo();
objfile.characteristics = (int)source.getTwo();
//string tbl - follows symbol tbl
uint strtblpos = symbolTblAddr + symbolCount * CoffSymbol.SYMTBLENTRYSIZE;
source.seek(strtblpos);
byte[] strtbl = null;
uint len = source.getFour();
if (len > 4)
{
source.seek(strtblpos);
strtbl = source.getRange(len);
}
//section tbl
source.seek(COFFHDRSIZE);
for (int i = 0; i < sectionCount; i++)
{
//if section name is stored in string tbl, we read in index & let caller deref the actual name
String secname = source.getAsciiString(8);
if (secname[0] == '/')
{
int stridx = Int32.Parse(secname.Substring(1));
secname = readString(strtbl, stridx);
}
//read section hdr field
uint memSize = source.getFour(); //don't use - 0 in object files
uint memPos = source.getFour();
uint fileSize = source.getFour();
uint filePos = source.getFour();
uint relocPos = source.getFour();
uint lineNumPos = source.getFour(); //don't use - deprecated
uint relocCount = source.getTwo();
uint lineNumCount = source.getTwo(); //don't use
uint flagval = source.getFour();
SectionSettings settings = SectionSettings.decodeFlags(flagval);
CoffSection section = new CoffSection(secname, settings);
section.owner = objfile;
section.secNum = i + 1;
section.memPos = memPos;
section.fileSize = fileSize;
section.filePos = filePos;
section.relocTblPos = relocPos;
section.relocTblCount = relocCount;
objfile.sections.Add(section);
objfile.secNames[section.name] = section;
}
//load symbols
source.seek(symbolTblAddr);
loadSymbols(source, symbolCount, strtbl, objfile);
foreach (CoffSection section in objfile.sections)
{
//load section data
section.data = new List <Byte>(source.getRange(section.filePos, section.fileSize));
//load sectionrelocs
loadRelocations(source, section, objfile);
}
return(objfile);
}
