public long Alloc(long Size) { long Position = PhysPos; Size = AMemoryHelper.PageRoundUp(Size); PhysPos += Size; if (PhysPos > AMemoryMgr.RamSize || PhysPos < 0) { throw new VmmOutOfMemoryException(Size); } return(Position); }
public AMemoryMapInfo GetMapInfo(long Position) { if (!IsValidPosition(Position)) { return(null); } Position = AMemoryHelper.PageRoundDown(Position); PTEntry BaseEntry = GetPTEntry(Position); bool IsSameSegment(long Pos) { if (!IsValidPosition(Pos)) { return(false); } PTEntry Entry = GetPTEntry(Pos); return(Entry.Map == BaseEntry.Map && Entry.Perm == BaseEntry.Perm && Entry.Type == BaseEntry.Type && Entry.Attr == BaseEntry.Attr); } long Start = Position; long End = Position + PageSize; while (Start > 0 && IsSameSegment(Start - PageSize)) { Start -= PageSize; } while (End < AddrSize && IsSameSegment(End)) { End += PageSize; } long Size = End - Start; return(new AMemoryMapInfo( Start, Size, BaseEntry.Type, BaseEntry.Attr, BaseEntry.Perm)); }
public void Reprotect(long Position, long Size, AMemoryPerm Perm) { Position = AMemoryHelper.PageRoundDown(Position); Size = AMemoryHelper.PageRoundUp(Size); long PagesCount = Size / PageSize; while (PagesCount-- > 0) { PTEntry Entry = GetPTEntry(Position); Entry.Perm = Perm; SetPTEntry(Position, Entry); Position += PageSize; } }
public void MapMirror(long Src, long Dst, long Size, int Type) { Src = AMemoryHelper.PageRoundDown(Src); Dst = AMemoryHelper.PageRoundDown(Dst); Size = AMemoryHelper.PageRoundUp(Size); long PagesCount = Size / PageSize; while (PagesCount-- > 0) { PTEntry Entry = GetPTEntry(Src); Entry.Type = Type; Entry.Map = PTMap.Mirror; Entry.Position = Dst; SetPTEntry(Src, Entry); Src += PageSize; Dst += PageSize; } }
public bool MapPhys(long Src, long Dst, long Size, int Type, AMemoryPerm Perm) { Src = AMemoryHelper.PageRoundDown(Src); Dst = AMemoryHelper.PageRoundDown(Dst); Size = AMemoryHelper.PageRoundUp(Size); if (Dst < 0 || Dst + Size >= RamSize) { return(false); } long PagesCount = Size / PageSize; while (PagesCount-- > 0) { SetPTEntry(Src, new PTEntry(Dst, Type, PTMap.Physical, Perm)); Src += PageSize; Dst += PageSize; } return(true); }