/* Vtable:
*
* TIPtr (just to a glorified TypeSpec)
* IFacePtr (to list of implemented interfaces)
* Extends (to base classes for quick castclassex)
* TypeSize (to allow MemberwiseClone to work without full Reflection)
* Any target-specific data
* Method 0
* ...
*
* IFaceList TODO
*
*
*/
public static void OutputVTable(TypeSpec ts,
target.Target t, binary_library.IBinaryFile of,
TysilaState s,
MetadataStream base_m = null,
ISection os = null,
ISection data_sect = null)
{
// Don't compile if not for this architecture
if (!t.IsTypeValid(ts))
{
return;
}
/* New signature table */
s.sigt = new SignatureTable(ts.MangleType());
// If its a delegate type we also need to output its methods
if (ts.IsDelegate && !ts.IsGenericTemplate)
{
s.r.DelegateRequestor.Request(ts);
}
if (os == null)
{
os = of.GetRDataSection();
}
var d = os.Data;
var ptr_size = t.GetCTSize(ir.Opcode.ct_object);
os.Align(ptr_size);
ulong offset = (ulong)os.Data.Count;
/* Symbol */
var sym = of.CreateSymbol();
sym.Name = ts.MangleType();
sym.ObjectType = binary_library.SymbolObjectType.Object;
sym.Offset = offset;
sym.Type = binary_library.SymbolType.Global;
os.AddSymbol(sym);
if (base_m != null && ts.m != base_m)
{
sym.Type = SymbolType.Weak;
}
/* TIPtr */
var tiptr_offset = s.sigt.GetSignatureAddress(ts.Signature, t, s);
var ti_reloc = of.CreateRelocation();
ti_reloc.Addend = tiptr_offset;
ti_reloc.DefinedIn = os;
ti_reloc.Offset = offset;
ti_reloc.Type = t.GetDataToDataReloc();
ti_reloc.References = of.CreateSymbol();
ti_reloc.References.Name = s.sigt.GetStringTableName();
of.AddRelocation(ti_reloc);
for (int i = 0; i < ptr_size; i++, offset++)
{
d.Add(0);
}
/* IFacePtr */
IRelocation if_reloc = null;
if (!ts.IsGenericTemplate && !ts.IsInterface && ts.stype != TypeSpec.SpecialType.Ptr && ts.stype != TypeSpec.SpecialType.MPtr)
{
if_reloc = of.CreateRelocation();
if_reloc.DefinedIn = os;
if_reloc.Offset = offset;
if_reloc.Type = t.GetDataToDataReloc();
if_reloc.References = sym;
of.AddRelocation(if_reloc);
}
for (int i = 0; i < ptr_size; i++, offset++)
{
d.Add(0);
}
/* Extends */
var ts_extends = ts.GetExtends();
if (ts_extends != null)
{
var ext_reloc = of.CreateRelocation();
ext_reloc.Addend = 0;
ext_reloc.DefinedIn = os;
ext_reloc.Offset = offset;
ext_reloc.Type = t.GetDataToDataReloc();
var ext_sym = of.CreateSymbol();
ext_sym.Name = ts_extends.MangleType();
ext_reloc.References = ext_sym;
of.AddRelocation(ext_reloc);
s.r.VTableRequestor.Request(ts_extends);
}
for (int i = 0; i < ptr_size; i++, offset++)
{
d.Add(0);
}
if (ts.IsInterface || ts.IsGenericTemplate || ts.stype == TypeSpec.SpecialType.MPtr || ts.stype == TypeSpec.SpecialType.Ptr)
{
/* Type size is zero for somethinh we cannot
* instantiate */
for (int i = 0; i < ptr_size; i++, offset++)
{
d.Add(0);
}
/* Flags */
AddFlags(d, ts, ref offset, t);
/* BaseType */
AddBaseType(d, ts, of, os, ref offset, t, s);
// Target-specific information
t.AddExtraVTableFields(ts, d, ref offset);
}
else
{
/* Type size */
var tsize = t.IntPtrArray(BitConverter.GetBytes(GetTypeSize(ts, t)));
foreach (var b in tsize)
{
d.Add(b);
offset++;
}
/* Flags */
AddFlags(d, ts, ref offset, t);
/* BaseType */
AddBaseType(d, ts, of, os, ref offset, t, s);
// Target specific information
t.AddExtraVTableFields(ts, d, ref offset);
/* Virtual methods */
OutputVirtualMethods(ts, of, os,
d, ref offset, t, s);
/* Interface implementations */
// build list of implemented interfaces
var ii = ts.ImplementedInterfaces;
// first, add all interface implementations
List <ulong> ii_offsets = new List <ulong>();
for (int i = 0; i < ii.Count; i++)
{
ii_offsets.Add(offset - sym.Offset);
OutputInterface(ts, ii[i],
of, os, d, ref offset, t, s);
s.r.VTableRequestor.Request(ii[i]);
}
// point iface ptr here
if_reloc.Addend = (long)offset - (long)sym.Offset;
for (int i = 0; i < ii.Count; i++)
{
// list is pointer to interface declaration, then implementation
var id_ptr_sym = of.CreateSymbol();
id_ptr_sym.Name = ii[i].MangleType();
var id_ptr_reloc = of.CreateRelocation();
id_ptr_reloc.Addend = 0;
id_ptr_reloc.DefinedIn = os;
id_ptr_reloc.Offset = offset;
id_ptr_reloc.References = id_ptr_sym;
id_ptr_reloc.Type = t.GetDataToDataReloc();
of.AddRelocation(id_ptr_reloc);
for (int j = 0; j < ptr_size; j++, offset++)
{
d.Add(0);
}
// implementation
var ii_ptr_reloc = of.CreateRelocation();
ii_ptr_reloc.Addend = (long)ii_offsets[i];
ii_ptr_reloc.DefinedIn = os;
ii_ptr_reloc.Offset = offset;
ii_ptr_reloc.References = sym;
ii_ptr_reloc.Type = t.GetDataToDataReloc();
of.AddRelocation(ii_ptr_reloc);
for (int j = 0; j < ptr_size; j++, offset++)
{
d.Add(0);
}
}
// null terminate the list
for (int j = 0; j < ptr_size; j++, offset++)
{
d.Add(0);
}
}
sym.Size = (long)(offset - sym.Offset);
/* Output signature table if any */
if (data_sect == null)
{
data_sect = of.GetDataSection();
}
s.sigt.WriteToOutput(of, base_m, t, data_sect);
}
public static void OutputStaticFields(metadata.TypeSpec ts,
target.Target t, binary_library.IBinaryFile of,
MetadataStream base_m = null,
binary_library.ISection os = null,
binary_library.ISection tlsos = null)
{
// Don't compile if not for this architecture
if (!t.IsTypeValid(ts))
{
return;
}
int align = 1;
if (ts.SimpleType == 0)
{
align = GetTypeAlignment(ts, t, true);
}
if (os == null)
{
os = of.GetDataSection();
}
os.Align(t.GetPointerSize());
os.Align(align);
ulong offset = (ulong)os.Data.Count;
ulong tl_offset = 0;
if (tlsos != null)
{
tl_offset = (ulong)tlsos.Data.Count;
}
int cur_offset = 0;
int cur_tloffset = 0;
/* is_initialized */
for (int i = 0; i < t.psize; i++)
{
os.Data.Add(0);
}
cur_offset += t.psize;
/* Iterate through methods looking for requested
* one */
var first_fdef = ts.m.GetIntEntry(MetadataStream.tid_TypeDef,
ts.tdrow, 4);
var last_fdef = ts.m.GetLastFieldDef(ts.tdrow);
for (uint fdef_row = first_fdef; fdef_row < last_fdef; fdef_row++)
{
// Ensure field is static or not as required
var flags = ts.m.GetIntEntry(MetadataStream.tid_Field,
(int)fdef_row, 0);
if ((flags & 0x10) == 0x10)
{
// Increment by type size
var fsig = (int)ts.m.GetIntEntry(MetadataStream.tid_Field,
(int)fdef_row, 2);
var ft = ts.m.GetFieldType(ref fsig, ts.gtparams, null);
var ft_size = t.GetSize(ft);
ft_size = util.util.align(ft_size, align);
bool is_tls = ts.m.thread_local_fields[(int)fdef_row];
ISection cur_os = os;
if (is_tls)
{
if (tlsos == null)
{
throw new NotSupportedException("No thread-local section provided");
}
cur_os = tlsos;
}
/* See if there is any data defined as an rva */
var rva = ts.m.fieldrvas[(int)fdef_row];
if (rva != 0)
{
var rrva = (int)ts.m.ResolveRVA(rva);
for (int i = 0; i < ft_size; i++)
{
cur_os.Data.Add(ts.m.file.ReadByte(rrva++));
}
}
else
{
for (int i = 0; i < ft_size; i++)
{
cur_os.Data.Add(0);
}
}
/* Output any additional defined symbols */
foreach (var alias in ts.m.GetFieldAliases((int)fdef_row))
{
var asym = of.CreateSymbol();
asym.Name = alias;
asym.Offset = offset + (ulong)cur_offset;
asym.Type = binary_library.SymbolType.Global;
asym.ObjectType = binary_library.SymbolObjectType.Object;
cur_os.AddSymbol(asym);
asym.Size = ft_size;
if (base_m != null && ts.m != base_m)
{
asym.Type = binary_library.SymbolType.Weak;
}
}
if (is_tls)
{
cur_tloffset += ft_size;
}
else
{
cur_offset += ft_size;
}
}
}
if (cur_offset > 0)
{
/* Add symbol */
var sym = of.CreateSymbol();
sym.Name = ts.m.MangleType(ts) + "S";
sym.Offset = offset;
sym.Type = binary_library.SymbolType.Global;
sym.ObjectType = binary_library.SymbolObjectType.Object;
os.AddSymbol(sym);
sym.Size = os.Data.Count - (int)offset;
if (base_m != null && ts.m != base_m)
{
sym.Type = binary_library.SymbolType.Weak;
}
}
if (cur_tloffset > 0)
{
/* Add thread local symbol */
var sym = of.CreateSymbol();
sym.Name = ts.m.MangleType(ts) + "ST";
sym.Offset = tl_offset;
sym.Type = binary_library.SymbolType.Global;
sym.ObjectType = binary_library.SymbolObjectType.Object;
tlsos.AddSymbol(sym);
sym.Size = tlsos.Data.Count - (int)tl_offset;
if (base_m != null && ts.m != base_m)
{
sym.Type = binary_library.SymbolType.Weak;
}
}
}
