From 7ee008e150bc5bcf76082d726f719ee0fdfda982 Mon Sep 17 00:00:00 2001
From: SulfurNitride <SulfurNitride@users.noreply.github.com>
Date: Wed, 11 Feb 2026 02:37:39 -0600
Subject: Fluorine Manager: full Linux port of Mod Organizer 2

Complete native Linux port with FUSE-based virtual filesystem,
Proton/umu-run integration, and Flatpak packaging.

Key features:
- FUSE VFS replacing Windows USVFS (in-process + standalone helper for Flatpak)
- Proton/GE-Proton/umu-run launcher with env var forwarding
- Flatpak support (sandbox-aware VFS, NXM handler, umu-run)
- Wine prefix management UI
- Case-insensitive path resolution for Linux filesystems
- QSettings-safe INI handling (avoids Bethesda INI corruption)
- Portable instance support with auto-generated launcher scripts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 libs/usvfs/src/thooklib/udis86wrapper.cpp | 102 ++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 libs/usvfs/src/thooklib/udis86wrapper.cpp

(limited to 'libs/usvfs/src/thooklib/udis86wrapper.cpp')

diff --git a/libs/usvfs/src/thooklib/udis86wrapper.cpp b/libs/usvfs/src/thooklib/udis86wrapper.cpp
new file mode 100644
index 0000000..1ac7332
--- /dev/null
+++ b/libs/usvfs/src/thooklib/udis86wrapper.cpp
@@ -0,0 +1,102 @@
+/*
+Userspace Virtual Filesystem
+
+Copyright (C) 2015 Sebastian Herbord. All rights reserved.
+
+This file is part of usvfs.
+
+usvfs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+usvfs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with usvfs. If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "udis86wrapper.h"
+#include "pch.h"
+#include <boost/predef.h>
+#include <shmlogger.h>
+#include <stdexcept>
+
+namespace HookLib
+{
+
+UDis86Wrapper::UDis86Wrapper()
+{
+  ud_init(&m_Obj);
+  ud_set_syntax(&m_Obj, UD_SYN_INTEL);
+#if BOOST_ARCH_X86_64
+  ud_set_mode(&m_Obj, 64);
+#else
+  ud_set_mode(&m_Obj, 32);
+#endif
+}
+
+void UDis86Wrapper::setInputBuffer(const uint8_t* buffer, size_t size)
+{
+  m_Buffer = buffer;
+  ud_set_input_buffer(&m_Obj, buffer, size);
+  ud_set_pc(&m_Obj, reinterpret_cast<uint64_t>(m_Buffer));
+}
+
+ud_t& UDis86Wrapper::obj()
+{
+  return m_Obj;
+}
+
+bool UDis86Wrapper::isRelativeJump()
+{
+  ud_mnemonic_code code = ud_insn_mnemonic(&m_Obj);
+  // all conditional jumps and loops are relative, as are unconditional jumps with an
+  // offset operand
+  return (code == UD_Ijo) || (code == UD_Ijno) || (code == UD_Ijb) ||
+         (code == UD_Ijae) || (code == UD_Ijz) || (code == UD_Ijnz) ||
+         (code == UD_Ijbe) || (code == UD_Ija) || (code == UD_Ijs) ||
+         (code == UD_Ijns) || (code == UD_Ijp) || (code == UD_Ijnp) ||
+         (code == UD_Ijl) || (code == UD_Ijge) || (code == UD_Ijle) ||
+         (code == UD_Ijg) || (code == UD_Ijcxz) || (code == UD_Ijecxz) ||
+         (code == UD_Ijrcxz) || (code == UD_Iloop) || (code == UD_Iloope) ||
+         (code == UD_Iloopne) ||
+         ((code == UD_Icall) && (ud_insn_opr(&m_Obj, 0)->type == UD_OP_JIMM)) ||
+         ((code == UD_Ijmp) && (ud_insn_opr(&m_Obj, 0)->type == UD_OP_JIMM));
+}
+
+intptr_t UDis86Wrapper::jumpOffset()
+{
+  const ud_operand_t* op = ud_insn_opr(&m_Obj, 0);
+  switch (op->size) {
+  case 8:
+    return static_cast<intptr_t>(op->lval.sbyte);
+  case 16:
+    return static_cast<intptr_t>(op->lval.sword);
+  case 32:
+    return static_cast<intptr_t>(op->lval.sdword);
+  case 64:
+    return static_cast<intptr_t>(op->lval.sqword);
+  default:
+    throw std::runtime_error("unsupported jump size");
+  }
+}
+
+uint64_t UDis86Wrapper::jumpTarget()
+{
+  // TODO: assert we're actually on a jump
+
+  uint64_t res = ud_insn_off(&m_Obj) + ud_insn_len(&m_Obj);
+
+  res += jumpOffset();
+
+  if (ud_insn_opr(&m_Obj, 0)->base == UD_R_RIP) {
+    res = *reinterpret_cast<uintptr_t*>(res);
+  }
+
+  return res;
+}
+
+}  // namespace HookLib
-- 
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