public void relocate32(int hunk_no, byte[] data, uint offset, uint hunk_addr)
{
var delta = MemoryArea.ReadBeUInt32(data, offset);
var addr = hunk_addr + delta;
MemoryArea.WriteBeUInt32(data, offset, addr);
Debug.WriteIf(Trace.TraceVerbose, string.Format("#{0,2} + {1:X8}: {2:X6} (delta) + {3:X6} (hunk_addr) -> {4:X6}", hunk_no, offset, delta, hunk_addr, addr));
}
public ResourceFork(byte[] bytes, IProcessorArchitecture arch)
{
this.image = bytes;
this.arch = arch;
rsrcDataOff = MemoryArea.ReadBeUInt32(bytes, 0);
rsrcMapOff = MemoryArea.ReadBeUInt32(bytes, 4);
dataSize = MemoryArea.ReadBeUInt32(bytes, 8);
mapSize = MemoryArea.ReadBeUInt32(bytes, 0x0C);
rsrcTypes = new ResourceTypeCollection(image, rsrcMapOff, mapSize);
}
public override RelocationResults Relocate(Program program, Address addrLoad)
{
// Get the Reset address from offset $0004 of the interrupt vector.
var addrReset = Address.Ptr32(MemoryArea.ReadBeUInt32(RawImage, 4));
var eps = new List <EntryPoint>();
if (program.ImageMap.IsValidAddress(addrReset))
{
eps.Add(new EntryPoint(addrReset, "Reset", program.Architecture.CreateProcessorState()));
}
return(new RelocationResults(eps, new List <Address>()));
}
public ResourceFork(MacOSClassic platform, byte[] bytes)
{
this.image = bytes;
this.platform = platform;
this.arch = platform.Architecture;
rsrcDataOff = MemoryArea.ReadBeUInt32(bytes, 0);
rsrcMapOff = MemoryArea.ReadBeUInt32(bytes, 4);
dataSize = MemoryArea.ReadBeUInt32(bytes, 8);
mapSize = MemoryArea.ReadBeUInt32(bytes, 0x0C);
rsrcTypes = new ResourceTypeCollection(image, rsrcMapOff, mapSize);
}
public virtual void ParseOverlay(Action <Hunk> h)
{
OverlayHunk hunk = new OverlayHunk();
h(hunk);
// read size of overlay hunk
var ov_size = this.read_long();
if (ov_size < 0)
{
throw new BadImageFormatException(string.Format("{0} has invalid size.", hunk.HunkType));
}
// read data of overlay
var byte_size = (ov_size + 1) * 4;
var ov_data = f.ReadBytes(byte_size);
hunk.ov_data = ov_data;
// check: first get header hunk
var hdr_hunk = this.hunks[0];
if (hdr_hunk.HunkType != HunkType.HUNK_HEADER)
{
throw new BadImageFormatException(string.Format("{0} has no header hunk.", hunk.HunkType));
}
// first find the code segment of the overlay manager
var overlayManagerHunk = this.FindFirstCodeHunk();
if (overlayManagerHunk == null)
{
throw new BadImageFormatException(string.Format("{0} has no overlay manager hunk.", hunk.HunkType));
}
// check overlay manager
var overlay_mgr_data = overlayManagerHunk.Data;
uint magic = MemoryArea.ReadBeUInt32(overlay_mgr_data, 4);
if (magic != 0xABCD)
{
throw new BadImageFormatException("No valid overlay manager found.");
}
// check for standard overlay manager
var magic2 = MemoryArea.ReadBeUInt32(overlay_mgr_data, 24);
var magic3 = MemoryArea.ReadBeUInt32(overlay_mgr_data, 20);
var magic4 = MemoryArea.ReadBeUInt32(overlay_mgr_data, 32);
var std_overlay = magic2 == 23456 && magic3 == 122648165 && magic4 == 1919705465;
hunk.ov_std = std_overlay;
}
public IEnumerator <ResourceReference> GetEnumerator()
{
var offset = this.offset;
for (int i = 0; i < count; ++i)
{
ushort rsrcID = MemoryArea.ReadBeUInt16(bytes, offset);
string name = ReadName(MemoryArea.ReadBeUInt16(bytes, offset + 2));
uint dataOff = MemoryArea.ReadBeUInt32(bytes, offset + 4) & 0x00FFFFFFU;
yield return(new ResourceReference(rsrcID, name, dataOff));
offset += 0x0C;
}
}
public override RelocationResults Relocate(Program program, Address addrLoad)
{
// Get the Reset address from offset $0004 of the interrupt vector.
var addrReset = Address.Ptr32(MemoryArea.ReadBeUInt32(RawImage, 4));
var syms = new SortedList <Address, ImageSymbol>();
var eps = new List <ImageSymbol>();
if (program.SegmentMap.IsValidAddress(addrReset))
{
var sym = ImageSymbol.Procedure(program.Architecture, addrReset, "Reset", state: program.Architecture.CreateProcessorState());
syms.Add(sym.Address, sym);
eps.Add(sym);
}
return(new RelocationResults(eps, syms));
}
bool PerformRelocations(MemoryArea mem, ImageReader rdr)
{
uint fixup;
if (!rdr.TryReadBeUInt32(out fixup))
{
return(false);
}
if (fixup == 0)
{
return(true); // no relocations to do.
}
uint offset = fixup;
for (;;)
{
var dst = mem.BaseAddress + offset;
uint l = mem.ReadBeUInt32(offset);
l += mem.BaseAddress.ToUInt32();
mem.WriteBeUInt32(offset, l);
mem.Relocations.AddPointerReference(mem.BaseAddress.ToLinear() + offset, l);
byte b;
for (;;)
{
if (!rdr.TryReadByte(out b))
{
return(false);
}
if (b == 0)
{
return(true);
}
else if (b == 1)
{
offset += 254;
}
else
{
offset += b;
break;
}
}
}
}
