Kernel/binary.c

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