Unit FastCodePatch.pas works in Win32 platform. Delphi XE2 supports Win64 platform, any ideas how to make FastCodePatch works in Win64 platform?
unit FastcodePatch;
interface
function FastcodeGetAddress(AStub: Pointer): Pointer;
procedure FastcodeAddressPatch(const ASource, ADestination: Pointer);
implementation
uses
Windows;
type
PJump = ^TJump;
TJump = packed record
OpCode: Byte;
Distance: Pointer;
end;
function FastcodeGetAddress(AStub: Pointer): Pointer;
begin
if PBYTE(AStub)^ = $E8 then
begin
Inc(Integer(AStub));
Result := Pointer(Integer(AStub) + SizeOf(Pointer) + PInteger(AStub)^);
end
else
Result := nil;
end;
procedure FastcodeAddressPatch(const ASource, ADestination: Pointer);
const
Size = SizeOf(TJump);
var
NewJump: PJump;
OldProtect: Cardinal;
begin
if VirtualProtect(ASource, Size, PAGE_EXECUTE_READWRITE, OldProtect) then
begin
NewJump := PJump(ASource);
NewJump.OpCode := $E9;
NewJump.Distance := Pointer(Integer(ADestination) - Integer(ASource) - 5);
FlushInstructionCache(GetCurrentProcess, ASource, SizeOf(TJump));
VirtualProtect(ASource, Size, OldProtect, @OldProtect);
end;
end;
end.
The solution provided by Ville Krumlinde doesn't work on 64 bits package. It works on Standalone .exe application only.