From 5e334dc8c7dfc055a7a6bfadaee43735d4ab6692 Mon Sep 17 00:00:00 2001
From: inspectredc <inspectredc@gmail.com>
Date: Thu, 19 Jun 2025 12:21:07 +0100
Subject: [PATCH] Support virtual addrs lookup

---
 src/Companion.cpp | 15 ++++++++++++++-
 src/Companion.h   |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/Companion.cpp b/src/Companion.cpp
index 7a4ee09..e16a99f 100644
--- a/src/Companion.cpp
+++ b/src/Companion.cpp
@@ -405,6 +405,11 @@ void Companion::ParseCurrentFileConfig(YAML::Node node) {
         }
     }
 
+    if (node["virtual"]) {
+        auto virtualAddrMap = node["virtual"];
+        gVirtualAddrMap[gCurrentFile] = std::make_tuple<uint32_t, uint32_t>(virtualAddrMap[0].as<uint32_t>(), virtualAddrMap[1].as<uint32_t>());
+    }
+
     if(node["header"]) {
         auto header = node["header"];
         switch (this->gConfig.exporterType) {
@@ -1400,11 +1405,19 @@ std::optional<std::uint32_t> Companion::GetFileOffsetFromSegmentedAddr(const uin
     return std::nullopt;
 }
 
-std::optional<std::tuple<std::string, YAML::Node>> Companion::GetNodeByAddr(const uint32_t addr){
+std::optional<std::tuple<std::string, YAML::Node>> Companion::GetNodeByAddr(uint32_t addr){
     if(!this->gAddrMap.contains(this->gCurrentFile)){
         return std::nullopt;
     }
 
+    // HACK: Adjust address to rom address if virtual address
+    if (addr & 0x80000000) {
+        if (gVirtualAddrMap.contains(gCurrentFile)) {
+            addr -= std::get<0>(gVirtualAddrMap[gCurrentFile]);
+            addr += std::get<1>(gVirtualAddrMap[gCurrentFile]);
+        }
+    }
+
     if(!this->gAddrMap[this->gCurrentFile].contains(addr)){
         for (auto &file : this->gCurrentExternalFiles) {
             if (!this->gAddrMap.contains(file)) {
diff --git a/src/Companion.h b/src/Companion.h
index 4354a9b..60f10b6 100644
--- a/src/Companion.h
+++ b/src/Companion.h
@@ -212,6 +212,7 @@ private:
     std::variant<std::vector<std::string>, std::string> gWriteOrder;
     std::unordered_map<std::string, std::shared_ptr<BaseFactory>> gFactories;
     std::unordered_map<std::string, std::map<std::string, std::vector<WriteEntry>>> gWriteMap;
+    std::unordered_map<std::string, std::tuple<uint32_t, uint32_t>> gVirtualAddrMap;
     std::unordered_map<std::string, std::unordered_map<uint32_t, std::tuple<std::string, YAML::Node>>> gAddrMap;
 
     void ProcessFile(YAML::Node root);