Kernel/binary.c

   1 /*\r
   2  * Acess2\r
   3  * Common Binary Loader\r
   4  */\r
   5 #define DEBUG   0\r
   6 #include <common.h>\r
   7 #include <binary.h>\r
   8 \r
   9 // === CONSTANTS ===\r
  10 #define BIN_LOWEST      MM_USER_MIN             // 1MiB\r
  11 #define BIN_GRANUALITY  0x10000         // 64KiB\r
  12 #define BIN_HIGHEST     (0xBC000000-BIN_GRANUALITY)             // Just below the kernel\r
  13 #define KLIB_LOWEST     MM_MODULE_MIN\r
  14 #define KLIB_GRANUALITY 0x8000          // 32KiB\r
  15 #define KLIB_HIGHEST    (MM_MODULE_MAX-KLIB_GRANUALITY)\r
  16 \r
  17 // === TYPES ===\r
  18 typedef struct sKernelBin {\r
  19         struct sKernelBin       *Next;\r
  20         void    *Base;\r
  21         tBinary *Info;\r
  22 } tKernelBin;\r
  23 \r
  24 // === IMPORTS ===\r
  25 extern int      Proc_Clone(Uint *Err, Uint Flags);\r
  26 extern void     Threads_SetName(char *Name);\r
  27 extern char     *Threads_GetName(int ID);\r
  28 extern void     Threads_Exit(int, int);\r
  29 extern Uint     MM_ClearUser();\r
  30 extern void     Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize);\r
  31 extern tKernelSymbol    gKernelSymbols[];\r
  32 extern void             gKernelSymbolsEnd;\r
  33 extern tBinaryType      gELF_Info;\r
  34 \r
  35 // === PROTOTYPES ===\r
  36  int    Proc_Execve(char *File, char **ArgV, char **EnvP);\r
  37 Uint    Binary_Load(char *file, Uint *entryPoint);\r
  38 tBinary *Binary_GetInfo(char *truePath);\r
  39 Uint    Binary_MapIn(tBinary *binary);\r
  40 Uint    Binary_IsMapped(tBinary *binary);\r
  41 tBinary *Binary_DoLoad(char *truePath);\r
  42 void    Binary_Dereference(tBinary *Info);\r
  43 Uint    Binary_Relocate(void *Base);\r
  44 Uint    Binary_GetSymbolEx(char *Name, Uint *Value);\r
  45 Uint    Binary_FindSymbol(void *Base, char *Name, Uint *val);\r
  46 \r
  47 // === GLOBALS ===\r
  48  int    glBinListLock = 0;\r
  49 tBinary *glLoadedBinaries = NULL;\r
  50 char    **gsaRegInterps = NULL;\r
  51  int    giRegInterps = 0;\r
  52  int    glKBinListLock = 0;\r
  53 tKernelBin      *glLoadedKernelLibs;\r
  54 tBinaryType     *gRegBinTypes = &gELF_Info;\r
  55  \r
  56 // === FUNCTIONS ===\r
  57 /**\r
  58  * \fn int Proc_Spawn(char *Path)\r
  59  */\r
  60 int Proc_Spawn(char *Path)\r
  61 {\r
  62         char    stackPath[strlen(Path)+1];\r
  63         \r
  64         strcpy(stackPath, Path);\r
  65         \r
  66         LOG("stackPath = '%s'\n", stackPath);\r
  67         \r
  68         if(Proc_Clone(NULL, CLONE_VM) == 0)\r
  69         {\r
  70                 // CHILD\r
  71                 char    *args[2] = {stackPath, NULL};\r
  72                 LOG("stackPath = '%s'\n", stackPath);\r
  73                 Proc_Execve(stackPath, args, &args[1]);\r
  74                 for(;;);\r
  75         }\r
  76         return 0;\r
  77 }\r
  78 \r
  79 /**\r
  80  * \fn int Proc_Execve(char *File, char **ArgV, char **EnvP)\r
  81  * \brief Replace the current user image with another\r
  82  * \param File  File to load as the next image\r
  83  * \param ArgV  Arguments to pass to user\r
  84  * \param EnvP  User's environment\r
  85  * \note Called Proc_ for historical reasons\r
  86  */\r
  87 int Proc_Execve(char *File, char **ArgV, char **EnvP)\r
  88 {\r
  89          int    argc, envc, i;\r
  90          int    argenvBytes;\r
  91         char    *argenvBuf, *strBuf;\r
  92         char    **argvSaved, **envpSaved;\r
  93         char    *savedFile;\r
  94         Uint    entry;\r
  95         Uint    bases[2] = {0};\r
  96         \r
  97         ENTER("sFile pArgV pEnvP", File, ArgV, EnvP);\r
  98         \r
  99         // --- Save File, ArgV and EnvP (also get argc)\r
 100         \r
 101         // Count Arguments, Environment Variables and total string sizes\r
 102         argenvBytes = 0;\r
 103         for( argc = 0; ArgV && ArgV[argc]; argc++ )\r
 104                 argenvBytes += strlen(ArgV[argc])+1;\r
 105         for( envc = 0; EnvP && EnvP[envc]; envc++ )\r
 106                 argenvBytes += strlen(EnvP[envc])+1;\r
 107         argenvBytes = (argenvBytes + sizeof(void*)-1) & ~(sizeof(void*)-1);\r
 108         argenvBytes += (argc+1)*sizeof(void*) + (envc+1)*sizeof(void*);\r
 109         \r
 110         // Allocate\r
 111         argenvBuf = malloc(argenvBytes);\r
 112         if(argenvBuf == NULL) {\r
 113                 Warning("Proc_Execve - What the hell? The kernel is out of heap space");\r
 114                 return 0;\r
 115         }\r
 116         strBuf = argenvBuf + (argc+1)*sizeof(void*) + (envc+1)*sizeof(void*);\r
 117         \r
 118         // Populate\r
 119         argvSaved = (char **) argenvBuf;\r
 120         for( i = 0; i < argc; i++ )\r
 121         {\r
 122                 argvSaved[i] = strBuf;\r
 123                 strcpy(argvSaved[i], ArgV[i]);\r
 124                 strBuf += strlen(ArgV[i])+1;\r
 125         }\r
 126         argvSaved[i] = NULL;\r
 127         envpSaved = &argvSaved[i+1];\r
 128         for( i = 0; i < envc; i++ )\r
 129         {\r
 130                 envpSaved[i] = strBuf;\r
 131                 strcpy(envpSaved[i], EnvP[i]);\r
 132                 strBuf += strlen(EnvP[i])+1;\r
 133         }\r
 134         \r
 135         savedFile = malloc(strlen(File)+1);\r
 136         strcpy(savedFile, File);\r
 137         \r
 138         // --- Set Process Name\r
 139         Threads_SetName(File);\r
 140         \r
 141         // --- Clear User Address space\r
 142         MM_ClearUser();\r
 143         \r
 144         // --- Load new binary\r
 145         bases[0] = Binary_Load(savedFile, &entry);\r
 146         free(savedFile);\r
 147         if(bases[0] == 0)\r
 148         {\r
 149                 Warning("Proc_Execve - Unable to load '%s'", Threads_GetName(-1));\r
 150                 Threads_Exit(0, 0);\r
 151                 for(;;);\r
 152         }\r
 153         \r
 154         LOG("entry = 0x%x, bases[0] = 0x%x", entry, bases[0]);\r
 155         LEAVE('-');\r
 156         // --- And... Jump to it\r
 157         Proc_StartUser(entry, bases, argc, argvSaved, envpSaved, argenvBytes);\r
 158         for(;;);        // Tell GCC that we never return\r
 159 }\r
 160 \r
 161 /**\r
 162  * \fn Uint Binary_Load(char *file, Uint *entryPoint)\r
 163  */\r
 164 Uint Binary_Load(char *file, Uint *entryPoint)\r
 165 {\r
 166         char    *sTruePath;\r
 167         tBinary *pBinary;\r
 168         Uint    base = -1;\r
 169 \r
 170         ENTER("sfile", file);\r
 171         \r
 172         // Sanity Check Argument\r
 173         if(file == NULL) {\r
 174                 LEAVE('x', 0);\r
 175                 return 0;\r
 176         }\r
 177 \r
 178         // Get True File Path\r
 179         sTruePath = VFS_GetTruePath(file);\r
 180         \r
 181         if(sTruePath == NULL) {\r
 182                 Warning("[BIN ] '%s' does not exist.", file);\r
 183                 LEAVE('x', 0);\r
 184                 return 0;\r
 185         }\r
 186         \r
 187         LOG("sTruePath = '%s'", sTruePath);\r
 188 \r
 189         // Check if the binary has already been loaded\r
 190         if( !(pBinary = Binary_GetInfo(sTruePath)) )\r
 191                 pBinary = Binary_DoLoad(sTruePath);     // Else load it\r
 192         \r
 193         // Clean Up\r
 194         free(sTruePath);\r
 195         \r
 196         // Error Check\r
 197         if(pBinary == NULL) {\r
 198                 LEAVE('x', 0);\r
 199                 return 0;\r
 200         }\r
 201         \r
 202         #if 0\r
 203         if( (base = Binary_IsMapped(pBinary)) ) {\r
 204                 LEAVE('x', base);\r
 205                 return base;\r
 206         }\r
 207         #endif\r
 208         \r
 209         // Map into process space\r
 210         base = Binary_MapIn(pBinary);   // If so then map it in\r
 211         \r
 212         // Check for errors\r
 213         if(base == 0) {\r
 214                 LEAVE('x', 0);\r
 215                 return 0;\r
 216         }\r
 217         \r
 218         // Interpret\r
 219         if(pBinary->Interpreter) {\r
 220                 Uint start;\r
 221                 if( Binary_Load(pBinary->Interpreter, &start) == 0 ) {\r
 222                         LEAVE('x', 0);\r
 223                         return 0;\r
 224                 }\r
 225                 *entryPoint = start;\r
 226         }\r
 227         else\r
 228                 *entryPoint = pBinary->Entry - pBinary->Base + base;\r
 229         \r
 230         // Return\r
 231         LOG("*entryPoint = 0x%x", *entryPoint);\r
 232         LEAVE('x', base);\r
 233         return base;    // Pass the base as an argument to the user if there is an interpreter\r
 234 }\r
 235 \r
 236 /**\r
 237  \fn tBinary *Binary_GetInfo(char *truePath)\r
 238  \brief Finds a matching binary entry\r
 239  \param truePath        File Identifier (True path name)\r
 240 */\r
 241 tBinary *Binary_GetInfo(char *truePath)\r
 242 {\r
 243         tBinary *pBinary;\r
 244         pBinary = glLoadedBinaries;\r
 245         while(pBinary)\r
 246         {\r
 247                 if(strcmp(pBinary->TruePath, truePath) == 0)\r
 248                         return pBinary;\r
 249                 pBinary = pBinary->Next;\r
 250         }\r
 251         return NULL;\r
 252 }\r
 253 \r
 254 /**\r
 255  \fn Uint Binary_MapIn(tBinary *binary)\r
 256  \brief Maps an already-loaded binary into an address space.\r
 257  \param binary  Pointer to globally stored data.\r
 258 */\r
 259 Uint Binary_MapIn(tBinary *binary)\r
 260 {\r
 261         Uint    base;\r
 262         Uint    addr;\r
 263          int    i;\r
 264         \r
 265         // Reference Executable (Makes sure that it isn't unloaded)\r
 266         binary->ReferenceCount ++;\r
 267         \r
 268         // Get Binary Base\r
 269         base = binary->Base;\r
 270         \r
 271         // Check if base is free\r
 272         if(base != 0)\r
 273         {\r
 274                 for(i=0;i<binary->NumPages;i++)\r
 275                 {\r
 276                         if( MM_GetPhysAddr( binary->Pages[i].Virtual & ~0xFFF ) ) {\r
 277                                 base = 0;\r
 278                                 LOG("Address 0x%x is taken\n", binary->Pages[i].Virtual & ~0xFFF);\r
 279                                 break;\r
 280                         }\r
 281                 }\r
 282         }\r
 283         \r
 284         // Check if the executable has no base or it is not free\r
 285         if(base == 0)\r
 286         {\r
 287                 // If so, give it a base\r
 288                 base = BIN_HIGHEST;\r
 289                 while(base >= BIN_LOWEST)\r
 290                 {\r
 291                         for(i=0;i<binary->NumPages;i++)\r
 292                         {\r
 293                                 addr = binary->Pages[i].Virtual & ~0xFFF;\r
 294                                 addr -= binary->Base;\r
 295                                 addr += base;\r
 296                                 if( MM_GetPhysAddr( addr ) )    break;\r
 297                         }\r
 298                         // If space was found, break\r
 299                         if(i == binary->NumPages)               break;\r
 300                         // Else decrement pointer and try again\r
 301                         base -= BIN_GRANUALITY;\r
 302                 }\r
 303         }\r
 304         \r
 305         // Error Check\r
 306         if(base < BIN_LOWEST) {\r
 307                 Warning("[BIN ] Executable '%s' cannot be loaded, no space", binary->TruePath);\r
 308                 return 0;\r
 309         }\r
 310         \r
 311         // Map Executable In\r
 312         for(i=0;i<binary->NumPages;i++)\r
 313         {\r
 314                 addr = binary->Pages[i].Virtual & ~0xFFF;\r
 315                 addr -= binary->Base;\r
 316                 addr += base;\r
 317                 LOG("%i - 0x%x to 0x%x", i, addr, binary->Pages[i].Physical);\r
 318                 MM_Map( addr, (Uint) (binary->Pages[i].Physical) );\r
 319                 if( binary->Pages[i].Physical & 1)      // Read-Only\r
 320                         MM_SetFlags( addr, MM_PFLAG_RO, -1 );\r
 321                 else\r
 322                         MM_SetFlags( addr, MM_PFLAG_COW, -1 );\r
 323         }\r
 324         \r
 325         //LOG("*0x%x = 0x%x\n", binary->Pages[0].Virtual, *(Uint*)binary->Pages[0].Virtual);\r
 326         \r
 327         return base;\r
 328 }\r
 329 \r
 330 #if 0\r
 331 /**\r
 332  * \fn Uint Binary_IsMapped(tBinary *binary)\r
 333  * \brief Check if a binary is already mapped into the address space\r
 334  * \param binary        Binary information to check\r
 335  * \return Current Base or 0\r
 336  */\r
 337 Uint Binary_IsMapped(tBinary *binary)\r
 338 {\r
 339         Uint    iBase;\r
 340         \r
 341         // Check prefered base\r
 342         iBase = binary->Base;\r
 343         if(MM_GetPage( iBase ) == (binary->Pages[0].Physical & ~0xFFF))\r
 344                 return iBase;\r
 345         \r
 346         for(iBase = BIN_HIGHEST;\r
 347                 iBase >= BIN_LOWEST;\r
 348                 iBase -= BIN_GRANUALITY)\r
 349         {\r
 350                 if(MM_GetPage( iBase ) == (binary->Pages[0].Physical & ~0xFFF))\r
 351                         return iBase;\r
 352         }\r
 353         \r
 354         return 0;\r
 355 }\r
 356 #endif\r
 357 \r
 358 /**\r
 359  * \fn tBinary *Binary_DoLoad(char *truePath)\r
 360  * \brief Loads a binary file into memory\r
 361  * \param truePath      Absolute filename of binary\r
 362  */\r
 363 tBinary *Binary_DoLoad(char *truePath)\r
 364 {\r
 365         tBinary *pBinary;\r
 366          int    fp, i;\r
 367         Uint    ident;\r
 368         tBinaryType     *bt = gRegBinTypes;\r
 369         \r
 370         ENTER("struePath", truePath);\r
 371         \r
 372         // Open File\r
 373         fp = VFS_Open(truePath, VFS_OPENFLAG_READ);\r
 374         if(fp == -1) {\r
 375                 LOG("Unable to load file, access denied");\r
 376                 LEAVE('n');\r
 377                 return NULL;\r
 378         }\r
 379         \r
 380         // Read File Type\r
 381         VFS_Read(fp, 4, &ident);\r
 382         VFS_Seek(fp, 0, SEEK_SET);\r
 383         \r
 384         for(; bt; bt = bt->Next)\r
 385         {\r
 386                 if( (ident & bt->Mask) != (Uint)bt->Ident )\r
 387                         continue;\r
 388                 pBinary = bt->Load(fp);\r
 389                 break;\r
 390         }\r
 391         if(!bt) {\r
 392                 Warning("[BIN ] '%s' is an unknown file type. (0x%x 0x%x 0x%x 0x%x)",\r
 393                         truePath, ident&0xFF, (ident>>8)&0xFF, (ident>>16)&0xFF, (ident>>24)&0xFF);\r
 394                 LEAVE('n');\r
 395                 return NULL;\r
 396         }\r
 397         \r
 398         // Error Check\r
 399         if(pBinary == NULL) {\r
 400                 LEAVE('n');\r
 401                 return NULL;\r
 402         }\r
 403         \r
 404         // Initialise Structure\r
 405         pBinary->ReferenceCount = 0;\r
 406         pBinary->TruePath = malloc( strlen(truePath) + 1 );\r
 407         strcpy(pBinary->TruePath, truePath);\r
 408         \r
 409         // Debug Information\r
 410         LOG("Interpreter: '%s'", pBinary->Interpreter);\r
 411         LOG("Base: 0x%x, Entry: 0x%x", pBinary->Base, pBinary->Entry);\r
 412         LOG("NumPages: %i", pBinary->NumPages);\r
 413         \r
 414         // Read Data\r
 415         for(i=0;i<pBinary->NumPages;i++)\r
 416         {\r
 417                 Uint    dest;\r
 418                 tPAddr  paddr;\r
 419                 paddr = (Uint)MM_AllocPhys();\r
 420                 MM_RefPhys( paddr );    // Make sure it is _NOT_ freed until we want it to be\r
 421                 dest = MM_MapTemp( paddr );\r
 422                 dest += pBinary->Pages[i].Virtual & 0xFFF;\r
 423                 LOG("dest = 0x%x, paddr = 0x%x", dest, paddr);\r
 424                 LOG("Pages[%i]={Physical:0x%x,Virtual:0x%x,Size:0x%x}",\r
 425                         i, pBinary->Pages[i].Physical, pBinary->Pages[i].Virtual, pBinary->Pages[i].Size);\r
 426                 \r
 427                 // Pure Empty Page\r
 428                 if(pBinary->Pages[i].Physical == -1) {\r
 429                         LOG("%i - ZERO", i);\r
 430                         memsetd( (void*)dest, 0, 1024 );\r
 431                 }\r
 432                 else\r
 433                 {\r
 434                         VFS_Seek( fp, pBinary->Pages[i].Physical, 1 );\r
 435                         if(pBinary->Pages[i].Size != 0x1000) {\r
 436                                 LOG("%i - 0x%x - 0x%x bytes",\r
 437                                         i, pBinary->Pages[i].Physical, pBinary->Pages[i].Size);\r
 438                                 memset( (void*)dest, 0, 0x1000 -(dest&0xFFF) );\r
 439                                 VFS_Read( fp, pBinary->Pages[i].Size, (void*)dest );\r
 440                         } else {\r
 441                                 LOG("%i - 0x%x", i, pBinary->Pages[i].Physical);\r
 442                                 VFS_Read( fp, 0x1000, (void*)dest );\r
 443                         }\r
 444                 }\r
 445                 pBinary->Pages[i].Physical = paddr;\r
 446                 MM_FreeTemp( dest );\r
 447         }\r
 448         LOG("Page Count: %i", pBinary->NumPages);\r
 449         \r
 450         // Close File\r
 451         VFS_Close(fp);\r
 452         \r
 453         // Add to the list\r
 454         LOCK(&glBinListLock);\r
 455         pBinary->Next = glLoadedBinaries;\r
 456         glLoadedBinaries = pBinary;\r
 457         RELEASE(&glBinListLock);\r
 458         \r
 459         // Return\r
 460         LEAVE('p', pBinary);\r
 461         return pBinary;\r
 462 }\r
 463 \r
 464 /**\r
 465  * \fn void Binary_Unload(void *Base)\r
 466  * \brief Unload / Unmap a binary\r
 467  * \param Base  Loaded Base\r
 468  * \note Currently used only for kernel libaries\r
 469  */\r
 470 void Binary_Unload(void *Base)\r
 471 {\r
 472         tKernelBin      *pKBin;\r
 473         tKernelBin      *prev = NULL;\r
 474          int    i;\r
 475         \r
 476         if((Uint)Base < 0xC0000000)\r
 477         {\r
 478                 // TODO: User Binaries\r
 479                 Warning("[BIN ] Unloading user binaries is currently unimplemented");\r
 480                 return;\r
 481         }\r
 482         \r
 483         // Kernel Libraries\r
 484         for(pKBin = glLoadedKernelLibs;\r
 485                 pKBin;\r
 486                 prev = pKBin, pKBin = pKBin->Next)\r
 487         {\r
 488                 // Check the base\r
 489                 if(pKBin->Base != Base) continue;\r
 490                 // Deallocate Memory\r
 491                 for(i = 0; i < pKBin->Info->NumPages; i++) {\r
 492                         MM_Deallocate( (Uint)Base + (i << 12) );\r
 493                 }\r
 494                 // Dereference Binary\r
 495                 Binary_Dereference( pKBin->Info );\r
 496                 // Remove from list\r
 497                 if(prev)        prev->Next = pKBin->Next;\r
 498                 else            glLoadedKernelLibs = pKBin->Next;\r
 499                 // Free Kernel Lib\r
 500                 free(pKBin);\r
 501                 return;\r
 502         }\r
 503 }\r
 504 \r
 505 /**\r
 506  * \fn void Binary_Dereference(tBinary *Info)\r
 507  * \brief Dereferences and if nessasary, deletes a binary\r
 508  * \param Info  Binary information structure\r
 509  */\r
 510 void Binary_Dereference(tBinary *Info)\r
 511 {\r
 512         // Decrement reference count\r
 513         Info->ReferenceCount --;\r
 514         \r
 515         // Check if it is still in use\r
 516         if(Info->ReferenceCount)        return;\r
 517         \r
 518         /// \todo Implement binary freeing\r
 519 }\r
 520 \r
 521 /**\r
 522  \fn char *Binary_RegInterp(char *path)\r
 523  \brief Registers an Interpreter\r
 524  \param path    Path to interpreter provided by executable\r
 525 */\r
 526 char *Binary_RegInterp(char *path)\r
 527 {\r
 528          int    i;\r
 529         // NULL Check Argument\r
 530         if(path == NULL)        return NULL;\r
 531         // NULL Check the array\r
 532         if(gsaRegInterps == NULL)\r
 533         {\r
 534                 giRegInterps = 1;\r
 535                 gsaRegInterps = malloc( sizeof(char*) );\r
 536                 gsaRegInterps[0] = malloc( strlen(path) );\r
 537                 strcpy(gsaRegInterps[0], path);\r
 538                 return gsaRegInterps[0];\r
 539         }\r
 540         \r
 541         // Scan Array\r
 542         for( i = 0; i < giRegInterps; i++ )\r
 543         {\r
 544                 if(strcmp(gsaRegInterps[i], path) == 0)\r
 545                         return gsaRegInterps[i];\r
 546         }\r
 547         \r
 548         // Interpreter is not in list\r
 549         giRegInterps ++;\r
 550         gsaRegInterps = malloc( sizeof(char*)*giRegInterps );\r
 551         gsaRegInterps[i] = malloc( strlen(path) );\r
 552         strcpy(gsaRegInterps[i], path);\r
 553         return gsaRegInterps[i];\r
 554 }\r
 555 \r
 556 // ============\r
 557 // Kernel Binary Handling\r
 558 // ============\r
 559 /**\r
 560  * \fn void *Binary_LoadKernel(char *path)\r
 561  * \brief Load a binary into kernel space\r
 562  * \note This function shares much with #Binary_Load, but does it's own mapping\r
 563  */\r
 564 void *Binary_LoadKernel(char *file)\r
 565 {\r
 566         char    *sTruePath;\r
 567         tBinary *pBinary;\r
 568         tKernelBin      *pKBinary;\r
 569         Uint    base = -1;\r
 570         Uint    addr;\r
 571          int    i;\r
 572 \r
 573         ENTER("sfile", file);\r
 574         \r
 575         // Sanity Check Argument\r
 576         if(file == NULL) {\r
 577                 LEAVE('n');\r
 578                 return 0;\r
 579         }\r
 580 \r
 581         // Get True File Path\r
 582         sTruePath = VFS_GetTruePath(file);\r
 583         if(sTruePath == NULL) {\r
 584                 LEAVE('n');\r
 585                 return 0;\r
 586         }\r
 587         \r
 588         // Check if the binary has already been loaded\r
 589         if( (pBinary = Binary_GetInfo(sTruePath)) )\r
 590         {\r
 591                 for(pKBinary = glLoadedKernelLibs;\r
 592                         pKBinary;\r
 593                         pKBinary = pKBinary->Next )\r
 594                 {\r
 595                         if(pKBinary->Info == pBinary) {\r
 596                                 LEAVE('p', pKBinary->Base);\r
 597                                 return pKBinary->Base;\r
 598                         }\r
 599                 }\r
 600         }\r
 601         else\r
 602                 pBinary = Binary_DoLoad(sTruePath);     // Else load it\r
 603         \r
 604         // Error Check\r
 605         if(pBinary == NULL) {\r
 606                 LEAVE('n');\r
 607                 return NULL;\r
 608         }\r
 609         \r
 610         // --------------\r
 611         // Now pBinary is valid (either freshly loaded or only user mapped)\r
 612         // So, map it into kernel space\r
 613         // --------------\r
 614         \r
 615         // Reference Executable (Makes sure that it isn't unloaded)\r
 616         pBinary->ReferenceCount ++;\r
 617         \r
 618         // Check compiled base\r
 619         base = pBinary->Base;\r
 620         // - Sanity Check\r
 621         if(base < KLIB_LOWEST || base > KLIB_HIGHEST || base + (pBinary->NumPages<<12) > KLIB_HIGHEST) {\r
 622                 base = 0;\r
 623         }\r
 624         // - Check if it is a valid base address\r
 625         if(base != 0)\r
 626         {\r
 627                 for(i=0;i<pBinary->NumPages;i++)\r
 628                 {\r
 629                         if( MM_GetPhysAddr( pBinary->Pages[i].Virtual & ~0xFFF ) ) {\r
 630                                 base = 0;\r
 631                                 LOG("Address 0x%x is taken\n", pBinary->Pages[i].Virtual & ~0xFFF);\r
 632                                 break;\r
 633                         }\r
 634                 }\r
 635         }\r
 636         \r
 637         // Check if the executable has no base or it is not free\r
 638         if(base == 0)\r
 639         {\r
 640                 // If so, give it a base\r
 641                 base = KLIB_LOWEST;\r
 642                 while(base < KLIB_HIGHEST)\r
 643                 {\r
 644                         for(i = 0; i < pBinary->NumPages; i++)\r
 645                         {\r
 646                                 addr = pBinary->Pages[i].Virtual & ~0xFFF;\r
 647                                 addr -= pBinary->Base;\r
 648                                 addr += base;\r
 649                                 if( MM_GetPhysAddr( addr ) )    break;\r
 650                         }\r
 651                         // If space was found, break\r
 652                         if(i == pBinary->NumPages)              break;\r
 653                         // Else decrement pointer and try again\r
 654                         base += KLIB_GRANUALITY;\r
 655                 }\r
 656         }\r
 657         \r
 658         // - Error Check\r
 659         if(base >= KLIB_HIGHEST) {\r
 660                 Warning("[BIN ] Executable '%s' cannot be loaded into kernel, no space", pBinary->TruePath);\r
 661                 Binary_Dereference( pBinary );\r
 662                 LEAVE('n');\r
 663                 return 0;\r
 664         }\r
 665         \r
 666         LOG("base = 0x%x", base);\r
 667         \r
 668         // - Map binary in\r
 669         LOG("pBinary = {NumPages:%i, Pages=%p}", pBinary->NumPages, pBinary->Pages);\r
 670         for(i = 0; i < pBinary->NumPages; i++)\r
 671         {\r
 672                 addr = pBinary->Pages[i].Virtual & ~0xFFF;\r
 673                 addr -= pBinary->Base;\r
 674                 addr += base;\r
 675                 LOG("%i - 0x%x to 0x%x", i, addr, pBinary->Pages[i].Physical);\r
 676                 MM_Map( addr, (Uint) (pBinary->Pages[i].Physical) );\r
 677                 MM_SetFlags( addr, MM_PFLAG_KERNEL, MM_PFLAG_KERNEL );\r
 678                 #if 0   // Why was this here? It's the kernel\r
 679                 if( pBinary->Pages[i].Physical & 1)     // Read-Only\r
 680                         MM_SetFlags( addr, MM_PFLAG_RO, MM_PFLAG_KERNEL );\r
 681                 else\r
 682                         MM_SetFlags( addr, MM_PFLAG_COW, MM_PFLAG_KERNEL );\r
 683                         //MM_SetCOW( addr );\r
 684                 #endif\r
 685         }
 686 \r
 687         // Relocate Library\r
 688         if( !Binary_Relocate( (void*)base ) )\r
 689         {\r
 690                 Warning("[BIN ] Relocation of '%s' failed, unloading", sTruePath);\r
 691                 Binary_Unload( (void*)base );\r
 692                 Binary_Dereference( pBinary );\r
 693                 LEAVE('n');\r
 694                 return 0;\r
 695         }\r
 696         \r
 697         // Add to list (relocator must look at itself manually, not via Binary_GetSymbol)\r
 698         pKBinary = malloc(sizeof(*pKBinary));\r
 699         pKBinary->Base = (void*)base;\r
 700         pKBinary->Info = pBinary;\r
 701         LOCK( &glKBinListLock );\r
 702         pKBinary->Next = glLoadedKernelLibs;\r
 703         glLoadedKernelLibs = pKBinary;\r
 704         RELEASE( &glKBinListLock );\r
 705         \r
 706         LEAVE('p', base);\r
 707         return (void*)base;\r
 708 }\r
 709 \r
 710 /**\r
 711  * \fn Uint Binary_Relocate(void *Base)\r
 712  * \brief Relocates a loaded binary (used by kernel libraries)\r
 713  * \param Base  Loaded base address of binary\r
 714  * \return Boolean Success\r
 715  */\r
 716 Uint Binary_Relocate(void *Base)\r
 717 {\r
 718         Uint32  ident = *(Uint32*) Base;\r
 719         tBinaryType     *bt = gRegBinTypes;\r
 720         \r
 721         for(; bt; bt = bt->Next)\r
 722         {\r
 723                 if( (ident & bt->Mask) == (Uint)bt->Ident )\r
 724                         return bt->Relocate( (void*)Base);\r
 725         }\r
 726         \r
 727         Warning("[BIN ] 0x%x is an unknown file type. (0x%x 0x%x 0x%x 0x%x)",\r
 728                 Base, ident&0xFF, (ident>>8)&0xFF, (ident>>16)&0xFF, (ident>>24)&0xFF);\r
 729         return 0;\r
 730 }\r
 731 \r
 732 /**\r
 733  * \fn int Binary_GetSymbol(char *Name, Uint *Val)\r
 734  * \brief Get a symbol value\r
 735  * \return Value of symbol or -1 on error\r
 736  * \r
 737  * Gets the value of a symbol from either the currently loaded\r
 738  * libraries or the kernel's exports.\r
 739  */\r
 740 int Binary_GetSymbol(char *Name, Uint *Val)\r
 741 {\r
 742         if( Binary_GetSymbolEx(Name, Val) )     return 1;\r
 743         return 0;\r
 744 }\r
 745 \r
 746 /**\r
 747  * \fn Uint Binary_GetSymbolEx(char *Name, Uint *Value)\r
 748  * \brief Get a symbol value\r
 749  * \r
 750  * Gets the value of a symbol from either the currently loaded\r
 751  * libraries or the kernel's exports.\r
 752  */\r
 753 Uint Binary_GetSymbolEx(char *Name, Uint *Value)\r
 754 {\r
 755          int    i;\r
 756         tKernelBin      *pKBin;\r
 757          int    numKSyms = ((Uint)&gKernelSymbolsEnd-(Uint)&gKernelSymbols)/sizeof(tKernelSymbol);\r
 758         \r
 759         // Scan Kernel\r
 760         for( i = 0; i < numKSyms; i++ )\r
 761         {\r
 762                 if(strcmp(Name, gKernelSymbols[i].Name) == 0) {\r
 763                         *Value = gKernelSymbols[i].Value;\r
 764                         return 1;\r
 765                 }\r
 766         }\r
 767         \r
 768         // Scan Loaded Libraries\r
 769         for(pKBin = glLoadedKernelLibs;\r
 770                 pKBin;\r
 771                 pKBin = pKBin->Next )\r
 772         {\r
 773                 if( Binary_FindSymbol(pKBin->Base, Name, Value) ) {\r
 774                         return 1;\r
 775                 }\r
 776         }\r
 777
 778         Warning("[BIN ] Unable to find symbol '%s'", Name);\r
 779         return 0;\r
 780 }\r
 781 \r
 782 /**\r
 783  * \fn Uint Binary_GetSymbolBin(void *Base, char *Name, Uint *val)\r
 784  * \brief Get a symbol from the specified library\r
 785  * \param Base  Base address\r
 786  * \param Name  Name of symbol to find\r
 787  * \param val   Pointer to place final value\r
 788  */\r
 789 Uint Binary_FindSymbol(void *Base, char *Name, Uint *val)\r
 790 {\r
 791         Uint32  ident = *(Uint32*) Base;\r
 792         tBinaryType     *bt = gRegBinTypes;\r
 793         \r
 794         for(; bt; bt = bt->Next)\r
 795         {\r
 796                 if( (ident & bt->Mask) == (Uint)bt->Ident )\r
 797                         return bt->GetSymbol(Base, Name, val);\r
 798         }\r
 799         \r
 800         Warning("[BIN ] 0x%x is an unknown file type. (0x%x 0x%x 0x%x 0x%x)",\r
 801                 Base, ident&0xFF, ident>>8, ident>>16, ident>>24);\r
 802         return 0;\r
 803 }\r