+++ /dev/null
-/*
- * Acess2
- * - Module Loader
- */
-#include <acess.h>
-#include <modules.h>
-
-#define USE_EDI 0
-#define USE_UDI 0
-
-// === PROTOTYPES ===
- int Modules_LoadBuiltins();
- 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);
-
-// === 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;
- int giModuleSpinlock = 0;
-tModule *gLoadedModules = NULL;
-
-// === CODE ===
-int Modules_LoadBuiltins()
-{
- int i, j, k;
- int numToInit = 0;
- Uint8 *baIsLoaded;
- char **deps;
-
- giNumBuiltinModules = (Uint)&gKernelModulesEnd - (Uint)&gKernelModules;
- giNumBuiltinModules /= sizeof(tModule);
-
- baIsLoaded = calloc( giNumBuiltinModules, sizeof(*baIsLoaded) );
-
- // Pass 1 - Are the dependencies compiled in?
- for( i = 0; i < giNumBuiltinModules; i++ )
- {
- deps = gKernelModules[i].Dependencies;
- if(deps)
- {
- for( j = 0; deps[j]; j++ )
- {
- for( k = 0; k < giNumBuiltinModules; k++ ) {
- if(strcmp(deps[j], gKernelModules[k].Name) == 0)
- break;
- }
- if(k == giNumBuiltinModules) {
- Warning("Unable to find dependency '%s' for '%s' in kernel",
- deps[j], gKernelModules[i].Name);
-
- baIsLoaded[i] = -1; // Don't Load
- break;
- }
- }
- }
- numToInit ++;
- }
-
- // Pass 2 - Intialise
- while(numToInit)
- {
- for( i = 0; i < giNumBuiltinModules; i++ )
- {
- if( baIsLoaded[i] ) continue; // Ignore already loaded modules
-
- deps = gKernelModules[i].Dependencies;
-
- if( deps )
- {
- for( j = 0; deps[j]; j++ )
- {
- for( k = 0; k < giNumBuiltinModules; k++ ) {
- if(strcmp(deps[j], gKernelModules[k].Name) == 0)
- break;
- }
- // `k` is assumed to be less than `giNumBuiltinModules`
-
- // If a dependency failed, skip and mark as failed
- if( baIsLoaded[k] == -1 ) {
- baIsLoaded[i] = -1;
- numToInit --;
- break;
- }
- // If a dependency is not intialised, skip
- if( !baIsLoaded[k] ) break;
- }
- // Check if we broke out
- if( deps[j] ) continue;
- }
-
- // All Dependencies OK? Initialise
- StartupPrint(gKernelModules[i].Name);
- Log("Initialising %p '%s' v%i.%i...",
- &gKernelModules[i],
- gKernelModules[i].Name,
- gKernelModules[i].Version>>8, gKernelModules[i].Version & 0xFF
- );
- if( gKernelModules[i].Init(NULL) == 0 ) {
- Log("Loading Failed, all modules that depend on this will also fail");
- baIsLoaded[i] = -1;
- }
- // Mark as loaded
- else
- baIsLoaded[i] = 1;
- numToInit --;
- }
- }
-
- 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) {
- Warning("Module_LoadFile: Unable to load '%s'", Path);
- return 0;
- }
-
- // Check for Acess Driver
- if( Binary_FindSymbol(base, "DriverInfo", (Uint*)&info ) == 0 )
- {
- #if USE_EDI
- // Check for EDI Driver
- if( Binary_FindSymbol(base, "driver_init", NULL ) != 0 )
- {
- Binary_Relocate(base); // Relocate
- return Module_InitEDI( base ); // And intialise
- }
- #endif
-
- #if USE_UDI
- if( Binary_FindSymbol(base, "udi_init_info", NULL ) != 0 )
- {
- Binary_Relocate(base); // Relocate
- return UDI_LoadDriver( base ); // And intialise
- }
- #endif
-
- // Unknown module type?, return error
- Binary_Unload(base);
- #if USE_EDI
- Warning("Module_LoadFile: Module has neither a Module Info struct, nor an EDI entrypoint");
- #else
- Warning("Module_LoadFile: Module does not have a Module Info struct");
- #endif
- return 0;
- }
-
- // Check magic number
- if(info->Magic != MODULE_MAGIC)
- {
- Warning("Module_LoadFile: Module's magic value is invalid (0x%x != 0x%x)", info->Magic, MODULE_MAGIC);
- return 0;
- }
-
- // Check Architecture
- if(info->Arch != MODULE_ARCH_ID)
- {
- Warning("Module_LoadFile: Module is for a different architecture");
- return 0;
- }
-
- // Resolve Dependencies
- if( !Module_int_ResolveDeps(info) ) {
- Binary_Unload(base);
- return 0;
- }
-
- Log("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( &giModuleSpinlock );
- info->Next = gLoadedModules;
- gLoadedModules = info;
- RELEASE( &giModuleSpinlock );
-
- 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) ) {
- Warning("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;
-}
git.ucc.asn.au / tpg / acess2.git / blobdiff
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