+++ /dev/null
-/*
- * Acess2
- * - Module Loader
- */
-#define DEBUG 0
-#include <acess.h>
-#include <modules.h>
-
-#define USE_EDI 0
-#define USE_UDI 0
-
-// === PROTOTYPES ===
- int Modules_LoadBuiltins(void);
- int Module_RegisterLoader(tModuleLoader *Loader);
- int Module_LoadMem(void *Buffer, Uint Length, char *ArgString);
- int Module_LoadFile(char *Path, char *ArgString);
- int Module_int_ResolveDeps(tModule *Info);
- int Module_IsLoaded(char *Name);
-
-// === EXPORTS ===
-EXPORT(Module_RegisterLoader);
-
-// === IMPORTS ===
-#if USE_UDI
-extern int UDI_LoadDriver(void *Base);
-#endif
-extern void StartupPrint(char *Str);
-extern tModule gKernelModules[];
-extern void gKernelModulesEnd;
-
-// === GLOBALS ===
- int giNumBuiltinModules = 0;
-tSpinlock glModuleSpinlock;
-tModule *gLoadedModules = NULL;
-tModuleLoader *gModule_Loaders = NULL;
-tModule *gLoadingModules = NULL;
-
-// === CODE ===
-/**
- * \brief Initialises a module
- * \param Module Pointer to the module header
- * \return Zero on success, eModuleErrors or -1 on error
- * \retval -1 Returned if a dependency fails, or a circular dependency
- * exists.
- * \retval 0 Returned on success
- * \retval >0 Error code form the module's initialisation function
- */
-int Module_int_Initialise(tModule *Module)
-{
- int i, j;
- int ret;
- char **deps;
- tModule *mod;
-
- ENTER("pModule", Module);
-
- deps = Module->Dependencies;
-
- // Check if the module has been loaded
- for( mod = gLoadedModules; mod; mod = mod->Next )
- {
- if(mod == Module) LEAVE_RET('i', 0);
- }
-
- // Add to the "loading" (prevents circular deps)
- Module->Next = gLoadingModules;
- gLoadingModules = Module;
-
- // Scan dependency list
- for( j = 0; deps && deps[j]; j++ )
- {
- // Check if the module is already loaded
- for( mod = gLoadedModules; mod; mod = mod->Next )
- {
- if(strcmp(deps[j], mod->Name) == 0)
- break;
- }
- if( mod ) continue; // Dependency is loaded, check the rest
-
- // Ok, check if it's loading
- for( mod = gLoadingModules->Next; mod; mod = mod->Next )
- {
- if(strcmp(deps[j], mod->Name) == 0)
- break;
- }
- if( mod ) {
- Log_Warning("Module", "Circular dependency detected");
- LEAVE_RET('i', -1);
- }
-
- // So, if it's not loaded, we better load it then
- for( i = 0; i < giNumBuiltinModules; i ++ )
- {
- if( strcmp(deps[j], gKernelModules[i].Name) == 0 )
- break;
- }
- if( i == giNumBuiltinModules ) {
- Log_Warning("Module", "Dependency '%s' for module '%s' failed");
- return -1;
- }
-
- // Dependency is not loaded, so load it
- ret = Module_int_Initialise( &gKernelModules[i] );
- if( ret )
- {
- // The only "ok" error is NOTNEEDED
- if(ret != MODULE_ERR_NOTNEEDED)
- LEAVE_RET('i', -1);
- }
- }
-
- // All Dependencies OK? Initialise
- StartupPrint(Module->Name);
- Log_Log("Module", "Initialising %p '%s' v%i.%i...",
- Module, Module->Name,
- Module->Version >> 8, Module->Version & 0xFF
- );
-
- ret = Module->Init(NULL);
- if( ret != MODULE_ERR_OK ) {
- switch(ret)
- {
- case MODULE_ERR_MISC:
- Log_Warning("Module", "Unable to load, reason: Miscelanious");
- break;
- case MODULE_ERR_NOTNEEDED:
- Log_Warning("Module", "Unable to load, reason: Module not needed");
- break;
- case MODULE_ERR_MALLOC:
- Log_Warning("Module", "Unable to load, reason: Error in malloc/realloc/calloc, probably not good");
- break;
- default:
- Log_Warning("Module", "Unable to load reason - Unknown code %i", ret);
- break;
- }
- LEAVE_RET('i', ret);
- return ret;
- }
-
- // Remove from loading list
- gLoadingModules = gLoadingModules->Next;
-
- // Add to loaded list
- LOCK( &glModuleSpinlock );
- Module->Next = gLoadedModules;
- gLoadedModules = Module;
- RELEASE( &glModuleSpinlock );
-
- LEAVE_RET('i', 0);
-}
-
-/**
- * \brief Initialises builtin modules
- */
-int Modules_LoadBuiltins()
-{
- int i;
-
- // Count modules
- giNumBuiltinModules = (Uint)&gKernelModulesEnd - (Uint)&gKernelModules;
- giNumBuiltinModules /= sizeof(tModule);
-
- for( i = 0; i < giNumBuiltinModules; i++ )
- {
- Module_int_Initialise( &gKernelModules[i] );
- }
-
- return 0;
-}
-
-/**
- * \brief Registers a tModuleLoader with the kernel
- * \param Loader Pointer to loader structure (must be persistent)
- */
-int Module_RegisterLoader(tModuleLoader *Loader)
-{
- if(!Loader) return 1;
-
- Loader->Next = gModule_Loaders;
- gModule_Loaders = Loader;
-
- return 0;
-}
-
-/**
- * \fn int Module_LoadMem(void *Buffer, Uint Length, char *ArgString)
- * \brief Load a module from a memory location
- */
-int Module_LoadMem(void *Buffer, Uint Length, char *ArgString)
-{
- char path[VFS_MEMPATH_SIZE];
-
- VFS_GetMemPath(path, Buffer, Length);
-
- return Module_LoadFile( path, ArgString );
-}
-
-/**
- * \fn int Module_LoadFile(char *Path, char *ArgString)
- * \brief Load a module from a file
- */
-int Module_LoadFile(char *Path, char *ArgString)
-{
- void *base;
- tModule *info;
-
- // Load Binary
- base = Binary_LoadKernel(Path);
-
- // Error check
- if(base == NULL) {
- Log_Warning("Module", "Module_LoadFile - Unable to load '%s'", Path);
- return 0;
- }
-
- // Check for Acess Driver
- if( Binary_FindSymbol(base, "DriverInfo", (Uint*)&info ) == 0 )
- {
- tModuleLoader *tmp;
- for( tmp = gModule_Loaders; tmp; tmp = tmp->Next)
- {
- if( tmp->Detector(base) == 0 ) continue;
-
- return tmp->Loader(base);
- }
-
- #if USE_EDI
- // Check for EDI Driver
- if( Binary_FindSymbol(base, "driver_init", NULL ) != 0 )
- {
- return Module_InitEDI( base ); // And intialise
- }
- #endif
-
- // Unknown module type?, return error
- Binary_Unload(base);
- #if USE_EDI
- Log_Warning("Module", "Module '%s' has neither a Module Info struct, nor an EDI entrypoint", Path);
- #else
- Log_Warning("Module", "Module '%s' does not have a Module Info struct", Path);
- #endif
- return 0;
- }
-
- // Check magic number
- if(info->Magic != MODULE_MAGIC)
- {
- Log_Warning("Module", "Module's magic value is invalid (0x%x != 0x%x)", info->Magic, MODULE_MAGIC);
- return 0;
- }
-
- // Check Architecture
- if(info->Arch != MODULE_ARCH_ID)
- {
- Log_Warning("Module", "Module is for a different architecture");
- return 0;
- }
-
- #if 1
- if( Module_int_Initialise( info ) )
- {
- Binary_Unload(base);
- return 0;
- }
- #else
- // Resolve Dependencies
- if( !Module_int_ResolveDeps(info) ) {
- Binary_Unload(base);
- return 0;
- }
-
- Log_Log("Module", "Initialising %p '%s' v%i.%i...",
- info,
- info->Name,
- info->Version>>8, info->Version & 0xFF
- );
-
- // Call Initialiser
- //if( info->Init( ArgString ) != 0 )
- if( info->Init( NULL ) == 0 )
- {
- Binary_Unload(base);
- return 0;
- }
-
- // Add to list
- LOCK( &glModuleSpinlock );
- info->Next = gLoadedModules;
- gLoadedModules = info;
- RELEASE( &glModuleSpinlock );
- #endif
-
- return 1;
-}
-
-/**
- * \fn int Module_int_ResolveDeps(tModule *Info)
- * \brief Resolves the dependencies
- * \todo Implement
- * \note Currently does not resolve the dependencies, just checks them
- */
-int Module_int_ResolveDeps(tModule *Info)
-{
- char **names = Info->Dependencies;
-
- // Walk dependencies array
- for( ; *names; names++ )
- {
- // Check if the module is loaded
- if( !Module_IsLoaded(*names) ) {
- Log_Warning("Module", "Module `%s' requires `%s', which is not loaded\n", Info->Name, *names);
- return 0;
- }
- }
- return 1;
-}
-
-/**
- * \fn int Module_IsLoaded(char *Name)
- * \brief Checks if a module is loaded
- * \param Name Name of module to find
- */
-int Module_IsLoaded(char *Name)
-{
- tModule *mod = gLoadedModules;
-
- // Scan loaded list
- for( ; mod; mod = mod->Next )
- {
- // If found, return true
- if(strcmp(mod->Name, Name) == 0)
- return 1;
- }
- // not found - return false
- return 0;
-}
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