64-bit proxy mode for Linux

src/smoke_api/smoke_api.cpp

@@ -13,12 +13,15 @@
 
 #include "smoke_api.hpp"
 
+#include <polyhook2/MemProtector.hpp>
+
 #include "smoke_api/config.hpp"
 #include "smoke_api/steamclient/steamclient.hpp"
 #include "steam_api/steam_interfaces.hpp"
 #include "steam_api/virtuals/steam_api_virtuals.hpp"
 
 #include "build_config.h"
+#include "proxy_exports.hpp"
 
 #ifdef KB_WIN
 #include "koalabox/win.hpp"
@@ -208,6 +211,20 @@ namespace smoke_api {
 
                 const auto self_path = kb::paths::get_self_dir();
                 original_steamapi_handle = kb::lib::load_original_library(self_path, STEAM_API_MODULE);
+
+#ifdef KB_LINUX
+                // We need to enable writing into the instruction memory
+                // TODO: Move to generated file
+                const auto code_section = kb::lib::get_section_or_throw(module_handle, kb::lib::CODE_SECTION);
+                PLH::MemAccessor mem_accessor;
+                PLH::MemoryProtector const protector(
+                    reinterpret_cast<uint64_t>(code_section.start_address),
+                    code_section.size,
+                    PLH::ProtFlag::RWX,
+                    mem_accessor
+                );
+                proxy_exports::init(original_steamapi_handle);
+#endif
             }
 
             LOG_INFO("Initialization complete");

src/smoke_api/smoke_api.hpp

@@ -9,12 +9,11 @@ constexpr auto STEAM_USER = "SteamUser";
 constexpr auto STEAM_INVENTORY = "STEAMINVENTORY_INTERFACE_V";
 constexpr auto STEAM_GAME_SERVER = "SteamGameServer";
 
-// IMPORTANT: DLL_EXPORT is hardcoded in exports_generator.cpp,
+// IMPORTANT: DLL_EXPORT is hardcoded in windows_exports_generator.cpp & linux_exports_generator.cpp,
 // so any name changes here must be reflected there as well.
 #define DLL_EXPORT(TYPE) extern "C" [[maybe_unused]] __declspec(dllexport) TYPE __cdecl
 
 namespace smoke_api {
-
     void init(void* module_handle);
     void shutdown();