2 files changed, 135 insertions, 0 deletions
diff --git a/src/hook/payloads/CMakeLists.txt b/src/hook/payloads/CMakeLists.txt
new file mode 100644
index 0000000..fe3968e
--- /dev/null
+++ b/src/hook/payloads/CMakeLists.txt
@@ -0,0 +1,36 @@
+
+list(APPEND
+    modules
+    SysLoadLibrary
+)
+
+foreach(module ${modules})
+    set(module_name "${module}")
+    add_library(${module} SHARED "${module}.c")
+    # OF is 32 bit, so we need to be too
+    set_target_properties(${module} PROPERTIES COMPILE_OPTIONS "-m32" LINK_FLAGS "-m32")
+
+
+    list(APPEND
+        module_embed_output
+        ${CMAKE_CURRENT_BINARY_DIR}/lib${module_name}_so.c
+        ${CMAKE_CURRENT_BINARY_DIR}/lib${module_name}_so.h
+    )
+    # embed
+    add_custom_command(
+        OUTPUT ${module_embed_output}
+        COMMAND ${CMAKE_COMMAND}
+        "-Dbin_in=$<TARGET_FILE:${module}>"
+        -P ${CMAKE_SOURCE_DIR}/cmake/FileEmbed.cmake
+        DEPENDS ${module}
+    )
+    add_library(${module_name}_embed OBJECT ${module_embed_output})
+    list(APPEND
+        HOOK_SOURCES
+        $<TARGET_OBJECTS:${module_name}_embed>
+    )
+
+    set(module_embed_output "")
+endforeach()
+
+set(HOOK_SOURCES ${HOOK_SOURCES} PARENT_SCOPE)
diff --git a/src/hook/payloads/SysLoadLibrary.c b/src/hook/payloads/SysLoadLibrary.c
new file mode 100644
index 0000000..314426d
--- /dev/null
+++ b/src/hook/payloads/SysLoadLibrary.c
@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <assert.h>
+#include <dlfcn.h>
+
+#define _DEBUG 1
+#define Q_IsAbsolutePath V_IsAbsolutePath
+#define Assert(f) assert(f)
+#define CommandLine CommandLine_Tier0
+#define Msg printf
+#define V_strcpy_safe strcpy
+#define Q_snprintf snprintf
+#define _getcwd getcwd
+
+typedef void* HMODULE;
+typedef int Sys_Flags;
+typedef void* CSysModule;
+
+static bool (*V_IsAbsolutePath)(const char *pPath) = NULL;
+static HMODULE (*Sys_LoadLibrary)(const char *pLibraryName, Sys_Flags flags) = NULL;
+static char* (*CommandLine__ParmValue)(const char* param) = NULL;
+
+CSysModule *Sys_LoadModule_replacement( const char *pModuleName, Sys_Flags flags /* = SYS_NOFLAGS (0) */ )
+{
+    // If using the Steam filesystem, either the DLL must be a minimum footprint
+    // file in the depot (MFP) or a filesystem GetLocalCopy() call must be made
+    // prior to the call to this routine.
+    char szCwd[1024];
+    HMODULE hDLL = NULL;
+
+    if ( !Q_IsAbsolutePath( pModuleName ) )
+    {
+        char szAbsoluteModuleName[1024];
+
+        // check if the sourcemod provides the library
+        const char *pGameDir = CommandLine__ParmValue("-game");
+        if ( pGameDir )
+        {
+            V_strcpy_safe( szCwd, pGameDir );
+            if (szCwd[strlen(szCwd) - 1] == '/' || szCwd[strlen(szCwd) - 1] == '\\' )
+            {
+                szCwd[strlen(szCwd) - 1] = 0;
+            }
+
+            Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/%s", szCwd, pModuleName );
+
+            hDLL = Sys_LoadLibrary( szAbsoluteModuleName, flags );
+        }
+
+        // if the lib was not in the mod check the base game
+        if (!hDLL)
+        {
+            // full path wasn't passed in, using the current working dir
+            Assert( _getcwd( szCwd, sizeof( szCwd ) ) );
+
+            if (szCwd[strlen(szCwd) - 1] == '/' || szCwd[strlen(szCwd) - 1] == '\\' )
+            {
+                szCwd[strlen(szCwd) - 1] = 0;
+            }
+
+            size_t cCwd = strlen( szCwd );
+            if ( strstr( pModuleName, "bin/") == pModuleName || ( szCwd[ cCwd - 1 ] == 'n'  && szCwd[ cCwd - 2 ] == 'i' && szCwd[ cCwd - 3 ] == 'b' )  )
+            {
+                // don't make bin/bin path
+                Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/%s", szCwd, pModuleName );          
+            }
+            else
+            {
+                Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/%s", szCwd, pModuleName );
+            }
+            hDLL = Sys_LoadLibrary( szAbsoluteModuleName, flags );
+        }
+    }
+
+    if ( !hDLL )
+    {
+        // full path failed, let LoadLibrary() try to search the PATH now
+        hDLL = Sys_LoadLibrary( pModuleName, flags );
+#if defined( _DEBUG )
+        if ( !hDLL )
+        {
+            // So you can see what the error is in the debugger...
+            Msg( "Failed to load %s: %s\n", pModuleName, dlerror() );
+        }
+#endif // DEBUG
+    }
+
+    return hDLL;
+}
+
+
+void __attribute__((constructor)) lib_entry()
+{
+    //It prints "Injected!" once the library gets loaded.
+    fprintf(stderr, "Injected!\n");
+}