64-bit proxy mode for Linux

.idea/runConfigurations/exports_generator__32___linux_.xml

@@ -1,7 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="exports_generator [32] [linux]" type="CMakeRunConfiguration" factoryName="Application" PROGRAM_PARAMS="FALSE libsteam_api_o $ProjectFileDir$/res/steamworks/*/binaries/linux32/libsteam_api.so $CMakeCurrentGenerationDir$/generated/libsteam_api_exports.cpp" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="SmokeAPI" TARGET_NAME="exports_generator" CONFIG_NAME="Debug [32]" RUN_TARGET_PROJECT_NAME="SmokeAPI" RUN_TARGET_NAME="exports_generator">
-    <method v="2">
-      <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
-    </method>
-  </configuration>
-</component>

.idea/runConfigurations/exports_generator__64___win_.xml

@@ -1,5 +1,5 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="exports_generator [64] [win]" type="CMakeRunConfiguration" factoryName="Application" PROGRAM_PARAMS="FALSE steam_api64_o $ProjectFileDir$/res/steamworks/*/binaries/steam_api64.dll $CMakeCurrentGenerationDir$/generated/linker_exports_for_steam_api.h" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="SmokeAPI" TARGET_NAME="exports_generator" CONFIG_NAME="Debug [32]" RUN_TARGET_PROJECT_NAME="SmokeAPI" RUN_TARGET_NAME="exports_generator">
+  <configuration default="false" name="exports_generator [64] [win]" type="CMakeRunConfiguration" factoryName="Application" PROGRAM_PARAMS="FALSE steam_api64_o $ProjectFileDir$/res/steamworks/*/binaries/steam_api64.dll $CMakeCurrentGenerationDir$/generated/linker_exports_for_steam_api.h" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="SmokeAPI" TARGET_NAME="exports_generator" RUN_TARGET_PROJECT_NAME="SmokeAPI" RUN_TARGET_NAME="exports_generator">
     <method v="2">
       <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
     </method>

.idea/runConfigurations/linux_exports_generator__64_.xml

@@ -0,0 +1,7 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="linux_exports_generator [64]" type="CMakeRunConfiguration" factoryName="Application" PROGRAM_PARAMS="--input_libs_glob $ProjectFileDir$/res/steamworks/*/binaries/linux64/libsteam_api.so --output_path $CMakeCurrentGenerationDir$/generated/proxy_exports" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="SmokeAPI" TARGET_NAME="linux_exports_generator" CONFIG_NAME="Debug [32]" RUN_TARGET_PROJECT_NAME="SmokeAPI" RUN_TARGET_NAME="linux_exports_generator">
+    <method v="2">
+      <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
+    </method>
+  </configuration>
+</component>

CMakeLists.txt

@@ -53,7 +53,6 @@ if(WIN32)
 
     list(APPEND SMOKE_API_SOURCES src/main_win.cpp)
 else()
-    set_32_and_64(LINUX_DIR linux32 linux64)
     set(STEAM_API_MODULE libsteam_api)
     set(STEAMCLIENT_DLL steamclient)
 
@@ -133,11 +132,10 @@ if(WIN32)
     # Ignore linker warnings regarding COM-related private exports
     set_target_properties(SmokeAPI PROPERTIES LINK_FLAGS "/ignore:4104")
 else()
-    # configure_linker_exports(
-    #     TARGET SmokeAPI
-    #     HEADER_NAME "libsteam_api_exports.cpp"
-    #     FORWARDED_DLL "${STEAM_API_MODULE}_o.so"
-    #     DLL_FILES_GLOB "${CMAKE_CURRENT_SOURCE_DIR}/res/steamworks/*/binaries/${LINUX_DIR}/${STEAM_API_MODULE}.so"
-    #     INPUT_SOURCES_DIR ""
-    # )
+    set_32_and_64(LINUX_DIR linux32 linux64)
+    configure_proxy_exports(
+        TARGET SmokeAPI
+        INPUT_LIBS_GLOB "${CMAKE_SOURCE_DIR}/res/steamworks/*/binaries/${LINUX_DIR}/libsteam_api.so"
+        OUTPUT_NAME "proxy_exports"
+    )
 endif()

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();