Borland Delphi 7 Decompiler ~upd~ Today

1. What is a Delphi 7 Decompiler?

A Delphi 7 decompiler is a tool designed to reverse-engineer compiled Delphi executable files (.exe) or dynamic libraries (.dll) back into a human-readable form. Unlike a disassembler (which outputs assembly code) or a debugger (which traces execution), a decompiler aims to recover high-level Delphi source code—forms, events, methods, and component properties.

Delphi 7 (released 2002) is a classic Win32 compiler that produces native x86 code, but it embeds rich metadata (called Debug Info, RTTI – Run-Time Type Information, and DFM resources) that makes decompilation more feasible compared to C++ or Go binaries. borland delphi 7 decompiler

b. IDR (Interactive Delphi Reconstructor)

• Status: Actively maintained (as of 2025).
• Capabilities:
  • Superior RTTI parsing (supports Delphi 2–11, including 7).
  • Exports to .pas + .dfm + .dpr.
  • GUI with cross-references, hex viewer, resource editor.
  • Handles packed/obfuscated executables (partial).
• Limitations:
  • Still no perfect control flow decompilation – loops remain as goto-ridden Pascal.
  • Cannot recover local variable names (except with debug info).
• Best for: Professional reverse engineering of legacy Delphi apps.

Step 3 – Recover Method Stubs

IDR lists procedures with addresses. Example recovered skeleton: Status : Actively maintained (as of 2025)

procedure TForm1.Button1Click(Sender: TObject);
begin
  // address 00451234 – code not fully decompiled
end;

5. Decompilation Workflow (IDR Example)

A practical decompilation process for a Delphi 7 binary: the “decompilation” outputs C

e. Modern IL-based decompilers (e.g., Ghidra, IDA Pro + scripts)

• Ghidra with Delphi Class Recovery Plugin – can parse RTTI.
• IDA Pro + IDR plugin – semi-automatic.
• These are disassemblers first; the “decompilation” outputs C, not Pascal.