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