KernelLand/Kernel/binary.c

   1 /*
   2  * Acess2
   3  * Common Binary Loader
   4  */
   5 #define DEBUG   0
   6 #include <acess.h>
   7 #include <binary.h>
   8 #include <mm_virt.h>
   9 #include <hal_proc.h>
  10 #include <vfs_threads.h>
  11
  12 // === CONSTANTS ===
  13 #define BIN_LOWEST      MM_USER_MIN             // 1MiB
  14 #define BIN_GRANUALITY  0x10000         // 64KiB
  15 #define BIN_HIGHEST     (USER_LIB_MAX-BIN_GRANUALITY)           // Just below the kernel
  16 #define KLIB_LOWEST     MM_MODULE_MIN
  17 #define KLIB_GRANUALITY 0x10000         // 32KiB
  18 #define KLIB_HIGHEST    (MM_MODULE_MAX-KLIB_GRANUALITY)
  19
  20 // === TYPES ===
  21 typedef struct sKernelBin {
  22         struct sKernelBin       *Next;
  23         void    *Base;
  24         tBinary *Info;
  25 } tKernelBin;
  26
  27 // === IMPORTS ===
  28 extern char     *Threads_GetName(int ID);
  29 extern tKernelSymbol    gKernelSymbols[];
  30 extern tKernelSymbol    gKernelSymbolsEnd[];
  31 extern tBinaryType      gELF_Info;
  32
  33 // === PROTOTYPES ===
  34  int    Binary_int_CacheArgs(const char **Path, const char ***ArgV, const char ***EnvP, void *DestBuffer);
  35 tVAddr  Binary_Load(const char *Path, tVAddr *EntryPoint);
  36 tBinary *Binary_GetInfo(tMount MountID, tInode InodeID);
  37 tVAddr  Binary_MapIn(tBinary *Binary, const char *Path, tVAddr LoadMin, tVAddr LoadMax);
  38 tVAddr  Binary_IsMapped(tBinary *Binary);
  39 tBinary *Binary_DoLoad(tMount MountID, tInode Inode, const char *Path);
  40 void    Binary_Dereference(tBinary *Info);
  41 #if 0
  42 Uint    Binary_Relocate(void *Base);
  43 #endif
  44 Uint    Binary_GetSymbolEx(const char *Name, Uint *Value);
  45 #if 0
  46 Uint    Binary_FindSymbol(void *Base, const char *Name, Uint *Val);
  47 #endif
  48  int    Binary_int_CheckMemFree( tVAddr _start, size_t _len );
  49
  50 // === GLOBALS ===
  51 tShortSpinlock  glBinListLock;
  52 tBinary *glLoadedBinaries = NULL;
  53 char    **gsaRegInterps = NULL;
  54  int    giRegInterps = 0;
  55 tShortSpinlock  glKBinListLock;
  56 tKernelBin      *glLoadedKernelLibs;
  57 tBinaryType     *gRegBinTypes = &gELF_Info;
  58
  59 // === FUNCTIONS ===
  60 /**
  61  * \brief Registers a binary type
  62  */
  63 int Binary_RegisterType(tBinaryType *Type)
  64 {
  65         Type->Next = gRegBinTypes;
  66         gRegBinTypes = Type;
  67         return 1;
  68 }
  69
  70 /**
  71  * \fn int Proc_Spawn(const char *Path)
  72  */
  73 int Proc_Spawn(const char *Path)
  74 {
  75         char    stackPath[strlen(Path)+1];
  76         ENTER("sPath", Path);
  77
  78         strcpy(stackPath, Path);
  79
  80         LOG("stackPath = '%s'", stackPath);
  81
  82         if(Proc_Clone(CLONE_VM|CLONE_NOUSER) == 0)
  83         {
  84                 // CHILD
  85                 const char      *args[2] = {stackPath, NULL};
  86                 LOG("stackPath = '%s'", stackPath);
  87                 Proc_Execve(stackPath, args, &args[1], 0);
  88                 for(;;);
  89         }
  90         LEAVE('i', 0);
  91         return 0;
  92 }
  93
  94 /**
  95  * \todo Document
  96  */
  97 int Binary_int_CacheArgs(const char **Path, const char ***ArgV, const char ***EnvP, void *DestBuffer)
  98 {
  99          int    size, argc=0, envc=0;
 100          int    i;
 101         char    *strbuf;
 102         const char      **arrays;
 103
 104         // Calculate size
 105         size = 0;
 106         if( ArgV && *ArgV )
 107         {
 108                 const char      **argv = *ArgV;
 109                 for( argc = 0; argv[argc]; argc ++ )
 110                         size += strlen( argv[argc] ) + 1;
 111         }
 112         if( EnvP && *EnvP )
 113         {
 114                 const char      **envp = *EnvP;
 115                 for( envc = 0; envp[envc]; envc ++ )
 116                         size += strlen( envp[envc] ) + 1;
 117         }
 118         size = (size + sizeof(void*)-1) & ~(sizeof(void*)-1);   // Word align
 119         size += (argc+1+envc+1)*sizeof(void*);  // Arrays
 120         if( Path )
 121         {
 122                 size += strlen( *Path ) + 1;
 123         }
 124
 125         if( DestBuffer )
 126         {
 127                 arrays = DestBuffer;
 128                 strbuf = (void*)&arrays[argc+1+envc+1];
 129
 130                 // Fill ArgV
 131                 if( ArgV && *ArgV )
 132                 {
 133                         const char      **argv = *ArgV;
 134                         for( i = 0; argv[i]; i ++ )
 135                         {
 136                                 arrays[i] = strbuf;
 137                                 strcpy(strbuf, argv[i]);
 138                                 strbuf += strlen( argv[i] ) + 1;
 139                         }
 140                         *ArgV = arrays;
 141                         arrays += i;
 142                 }
 143                 *arrays++ = NULL;
 144                 // Fill EnvP
 145                 if( EnvP && *EnvP )
 146                 {
 147                         const char      **envp = *EnvP;
 148                         for( i = 0; envp[i]; i ++ )
 149                         {
 150                                 arrays[i] = strbuf;
 151                                 strcpy(strbuf, envp[i]);
 152                                 strbuf += strlen( envp[i] ) + 1;
 153                         }
 154                         *EnvP = arrays;
 155                         arrays += i;
 156                 }
 157                 *arrays++ = NULL;
 158                 // Fill path
 159                 if( Path )
 160                 {
 161                         strcpy(strbuf, *Path);
 162                         *Path = strbuf;
 163                 }
 164         }
 165
 166         return size;
 167 }
 168
 169 /**
 170  * \brief Create a new process with the specified set of file descriptors
 171  */
 172 int Proc_SysSpawn(const char *Binary, const char **ArgV, const char **EnvP, int nFD, int *FDs)
 173 {
 174         void    *handles;
 175         void    *cachebuf;
 176          int    size;
 177         tPID    ret;
 178
 179         // --- Save File, ArgV and EnvP
 180         size = Binary_int_CacheArgs( &Binary, &ArgV, &EnvP, NULL );
 181         cachebuf = malloc( size );
 182         Binary_int_CacheArgs( &Binary, &ArgV, &EnvP, cachebuf );
 183
 184         // Cache the VFS handles
 185         handles = VFS_SaveHandles(nFD, FDs);
 186
 187         // Create new process
 188         ret = Proc_Clone(CLONE_VM|CLONE_NOUSER);
 189         if( ret == 0 )
 190         {
 191                 VFS_RestoreHandles(nFD, handles);
 192                 VFS_FreeSavedHandles(nFD, handles);
 193                 // Frees cachebuf
 194                 Proc_Execve(Binary, ArgV, EnvP, size);
 195                 for(;;);
 196         }
 197         if( ret == -1 )
 198         {
 199                 VFS_FreeSavedHandles(nFD, handles);
 200                 free(cachebuf);
 201         }
 202
 203         return ret;
 204 }
 205
 206 /**
 207  * \brief Replace the current user image with another
 208  * \param File  File to load as the next image
 209  * \param ArgV  Arguments to pass to user
 210  * \param EnvP  User's environment
 211  * \note Called Proc_ for historical reasons
 212  */
 213 int Proc_Execve(const char *File, const char **ArgV, const char **EnvP, int DataSize)
 214 {
 215         void    *cachebuf;
 216         tVAddr  entry;
 217         Uint    base;   // Uint because Proc_StartUser wants it
 218          int    argc;
 219
 220         ENTER("sFile pArgV pEnvP", File, ArgV, EnvP);
 221
 222         // --- Save File, ArgV and EnvP
 223         if( DataSize == 0 )
 224         {
 225                 DataSize = Binary_int_CacheArgs( &File, &ArgV, &EnvP, NULL );
 226                 cachebuf = malloc( DataSize );
 227                 Binary_int_CacheArgs( &File, &ArgV, &EnvP, cachebuf );
 228         }
 229
 230         // --- Get argc
 231         for( argc = 0; ArgV && ArgV[argc]; argc ++ );
 232
 233         // --- Set Process Name
 234         Threads_SetName(File);
 235
 236         // --- Clear User Address space
 237         // NOTE: This is a little roundabout, maybe telling ClearUser to not touch the
 238         //       PPD area would be a better idea.
 239         {
 240                  int    nfd = *Threads_GetMaxFD();
 241                 void    *handles;
 242                 handles = VFS_SaveHandles(nfd, NULL);
 243                 VFS_CloseAllUserHandles();
 244                 MM_ClearUser();
 245                 VFS_RestoreHandles(nfd, handles);
 246                 VFS_FreeSavedHandles(nfd, handles);
 247         }
 248
 249         // --- Load new binary
 250         base = Binary_Load(File, &entry);
 251         if(base == 0)
 252         {
 253                 Log_Warning("Binary", "Proc_Execve - Unable to load '%s'", File);
 254                 LEAVE('-');
 255                 Threads_Exit(0, -10);
 256                 for(;;);
 257         }
 258
 259         LOG("entry = 0x%x, base = 0x%x", entry, base);
 260         LEAVE('-');
 261         // --- And... Jump to it
 262         Proc_StartUser(entry, base, argc, ArgV, DataSize);
 263         for(;;);        // Tell GCC that we never return
 264 }
 265
 266 /**
 267  * \brief Load a binary into the current address space
 268  * \param Path  Path to binary to load
 269  * \param EntryPoint    Pointer for exectuable entry point
 270  * \return Virtual address where the binary has been loaded
 271  */
 272 tVAddr Binary_Load(const char *Path, tVAddr *EntryPoint)
 273 {
 274         tMount  mount_id;
 275         tInode  inode;
 276         tBinary *pBinary;
 277         tVAddr  base = -1;
 278
 279         ENTER("sPath pEntryPoint", Path, EntryPoint);
 280
 281         // Sanity Check Argument
 282         if(Path == NULL) {
 283                 LEAVE('x', 0);
 284                 return 0;
 285         }
 286
 287         // Check if this path has been loaded before.
 288         #if 0
 289         // TODO: Implement a list of string/tBinary pairs for loaded bins
 290         #endif
 291
 292         // Get Inode
 293         {
 294                 int fd;
 295                 tFInfo  info;
 296                 fd = VFS_Open(Path, VFS_OPENFLAG_READ|VFS_OPENFLAG_EXEC);
 297                 if( fd == -1 ) {
 298                         LOG("%s does not exist", Path);
 299                         LEAVE_RET('x', 0);
 300                 }
 301                 VFS_FInfo(fd, &info, 0);
 302                 VFS_Close(fd);
 303                 mount_id = info.mount;
 304                 inode = info.inode;
 305                 LOG("mount_id = %i, inode = %i", mount_id, inode);
 306         }
 307
 308         // TODO: Also get modifcation time?
 309
 310         // Check if the binary has already been loaded
 311         if( !(pBinary = Binary_GetInfo(mount_id, inode)) )
 312                 pBinary = Binary_DoLoad(mount_id, inode, Path); // Else load it
 313
 314         // Error Check
 315         if(pBinary == NULL) {
 316                 LEAVE('x', 0);
 317                 return 0;
 318         }
 319
 320         // Map into process space
 321         base = Binary_MapIn(pBinary, Path, BIN_LOWEST, BIN_HIGHEST);
 322
 323         // Check for errors
 324         if(base == 0) {
 325                 LEAVE('x', 0);
 326                 return 0;
 327         }
 328
 329         // Interpret
 330         if(pBinary->Interpreter) {
 331                 tVAddr  start;
 332                 if( Binary_Load(pBinary->Interpreter, &start) == 0 ) {
 333                         LEAVE('x', 0);
 334                         return 0;
 335                 }
 336                 *EntryPoint = start;
 337         }
 338         else
 339                 *EntryPoint = pBinary->Entry - pBinary->Base + base;
 340
 341         // Return
 342         LOG("*EntryPoint = 0x%x", *EntryPoint);
 343         LEAVE('x', base);
 344         return base;    // Pass the base as an argument to the user if there is an interpreter
 345 }
 346
 347 /**
 348  * \brief Finds a matching binary entry
 349  * \param MountID       Mountpoint ID of binary file
 350  * \param InodeID       Inode ID of the file
 351  * \return Pointer to the binary definition (if already loaded)
 352  */
 353 tBinary *Binary_GetInfo(tMount MountID, tInode InodeID)
 354 {
 355         tBinary *pBinary;
 356         for(pBinary = glLoadedBinaries; pBinary; pBinary = pBinary->Next)
 357         {
 358                 if(pBinary->MountID == MountID && pBinary->Inode == InodeID)
 359                         return pBinary;
 360         }
 361         return NULL;
 362 }
 363
 364 /**
 365  * \brief Maps an already-loaded binary into an address space.
 366  * \param Binary        Pointer to globally stored binary definition
 367  * \param Path  Path to the binary's file (for debug)
 368  * \param LoadMin       Lowest location to map to
 369  * \param LoadMax       Highest location to map to
 370  * \return Base load address
 371  */
 372 tVAddr Binary_MapIn(tBinary *Binary, const char *Path, tVAddr LoadMin, tVAddr LoadMax)
 373 {
 374         tVAddr  base;
 375          int    i, fd;
 376
 377         ENTER("pBinary sPath pLoadMin pLoadMax", Binary, Path, LoadMin, LoadMax);
 378
 379         // Reference Executable (Makes sure that it isn't unloaded)
 380         Binary->ReferenceCount ++;
 381
 382         // Get Binary Base
 383         base = Binary->Base;
 384
 385         // Check if base is free
 386         if(base != 0)
 387         {
 388                 LOG("Checking base %p", base);
 389                 for( i = 0; i < Binary->NumSections; i ++ )
 390                 {
 391                         if( Binary_int_CheckMemFree( Binary->LoadSections[i].Virtual, Binary->LoadSections[i].MemSize ) )
 392                         {
 393                                 base = 0;
 394                                 LOG("Address 0x%x is taken\n", Binary->LoadSections[i].Virtual);
 395                                 break;
 396                         }
 397                 }
 398         }
 399
 400         // Check if the executable has no base or it is not free
 401         if(base == 0)
 402         {
 403                 // If so, give it a base
 404                 base = LoadMax;
 405                 while(base >= LoadMin)
 406                 {
 407                         for( i = 0; i < Binary->NumSections; i ++ )
 408                         {
 409                                 tVAddr  addr = Binary->LoadSections[i].Virtual - Binary->Base + base;
 410                                 size_t  size = Binary->LoadSections[i].MemSize;
 411                                 if( addr + size > LoadMax )
 412                                         break;
 413                                 if( Binary_int_CheckMemFree( addr, size ) )
 414                                         break;
 415                         }
 416                         // If space was found, break
 417                         if(i == Binary->NumSections)            break;
 418                         // Else decrement pointer and try again
 419                         base -= BIN_GRANUALITY;
 420                 }
 421                 LOG("Allocated base %p", base);
 422         }
 423
 424         // Error Check
 425         if(base < LoadMin) {
 426                 Log_Warning("Binary", "Executable '%s' cannot be loaded, no space", Path);
 427                 LEAVE('i', 0);
 428                 return 0;
 429         }
 430
 431         // Map Executable In
 432         if( Binary->MountID )
 433                 fd = VFS_OpenInode(Binary->MountID, Binary->Inode, VFS_OPENFLAG_READ);
 434         else
 435                 fd = VFS_Open(Path, VFS_OPENFLAG_READ);
 436         for( i = 0; i < Binary->NumSections; i ++ )
 437         {
 438                 tBinarySection  *sect = &Binary->LoadSections[i];
 439                 Uint    protflags, mapflags;
 440                 tVAddr  addr = sect->Virtual - Binary->Base + base;
 441                 LOG("%i - %p, 0x%x bytes from offset 0x%llx (%x)", i, addr, sect->FileSize, sect->Offset, sect->Flags);
 442
 443                 protflags = MMAP_PROT_READ;
 444                 mapflags = MMAP_MAP_FIXED;
 445
 446                 if( sect->Flags & BIN_SECTFLAG_EXEC )
 447                         protflags |= MMAP_PROT_EXEC;
 448                 // Read only pages are COW
 449                 if( sect->Flags & BIN_SECTFLAG_RO  ) {
 450                         VFS_MMap( (void*)addr, sect->FileSize, protflags, MMAP_MAP_SHARED|mapflags, fd, sect->Offset );
 451                 }
 452                 else {
 453                         protflags |= MMAP_PROT_WRITE;
 454                         VFS_MMap( (void*)addr, sect->FileSize, protflags, MMAP_MAP_PRIVATE|mapflags, fd, sect->Offset );
 455                 }
 456
 457                 // Apply anonymous memory for BSS
 458                 if( sect->FileSize < sect->MemSize ) {
 459                         mapflags |= MMAP_MAP_ANONYMOUS;
 460                         VFS_MMap(
 461                                 (void*)(addr + sect->FileSize), sect->MemSize - sect->FileSize,
 462                                 protflags, MMAP_MAP_PRIVATE|mapflags,
 463                                 0, 0
 464                                 );
 465                 }
 466         }
 467
 468         Log_Debug("Binary", "PID %i - Mapped '%s' to %p", Threads_GetPID(), Path, base);
 469         VFS_Close(fd);
 470
 471         LEAVE('p', base);
 472         return base;
 473 }
 474
 475 #if 0
 476 /**
 477  * \fn Uint Binary_IsMapped(tBinary *binary)
 478  * \brief Check if a binary is already mapped into the address space
 479  * \param binary        Binary information to check
 480  * \return Current Base or 0
 481  */
 482 Uint Binary_IsMapped(tBinary *binary)
 483 {
 484         Uint    iBase;
 485
 486         // Check prefered base
 487         iBase = binary->Base;
 488         if(MM_GetPage( iBase ) == (binary->Pages[0].Physical & ~0xFFF))
 489                 return iBase;
 490
 491         for(iBase = BIN_HIGHEST;
 492                 iBase >= BIN_LOWEST;
 493                 iBase -= BIN_GRANUALITY)
 494         {
 495                 if(MM_GetPage( iBase ) == (binary->Pages[0].Physical & ~0xFFF))
 496                         return iBase;
 497         }
 498
 499         return 0;
 500 }
 501 #endif
 502
 503 /**
 504  * \fn tBinary *Binary_DoLoad(char *truePath)
 505  * \brief Loads a binary file into memory
 506  * \param truePath      Absolute filename of binary
 507  */
 508 tBinary *Binary_DoLoad(tMount MountID, tInode Inode, const char *Path)
 509 {
 510         tBinary *pBinary;
 511          int    fp;
 512         Uint32  ident;
 513         tBinaryType     *bt = gRegBinTypes;
 514
 515         ENTER("iMountID XInode sPath", MountID, Inode, Path);
 516
 517         // Open File
 518         if( MountID )
 519         {
 520                 fp = VFS_OpenInode(MountID, Inode, VFS_OPENFLAG_READ);
 521         }
 522         else
 523         {
 524                 fp = VFS_Open(Path, VFS_OPENFLAG_READ);
 525         }
 526         if(fp == -1) {
 527                 LOG("Unable to load file, access denied");
 528                 LEAVE('n');
 529                 return NULL;
 530         }
 531
 532         LOG("fp = 0x%x", fp);
 533
 534         // Read File Type
 535         VFS_Read(fp, 4, &ident);
 536         VFS_Seek(fp, 0, SEEK_SET);
 537
 538         LOG("ident = 0x%x", ident);
 539
 540         // Determine the type
 541         for(; bt; bt = bt->Next)
 542         {
 543                 if( (ident & bt->Mask) != (Uint32)bt->Ident )
 544                         continue;
 545                 LOG("bt = %p (%s)", bt, bt->Name);
 546                 pBinary = bt->Load(fp);
 547                 break;
 548         }
 549
 550         // Close File
 551         VFS_Close(fp);
 552
 553         // Catch errors
 554         if(!bt) {
 555                 Log_Warning("Binary", "'%s' is an unknown file type. (%02x %02x %02x %02x)",
 556                         Path, ident&0xFF, (ident>>8)&0xFF, (ident>>16)&0xFF, (ident>>24)&0xFF);
 557                 LEAVE('n');
 558                 return NULL;
 559         }
 560
 561         LOG("pBinary = %p", pBinary);
 562
 563         // Error Check
 564         if(pBinary == NULL) {
 565                 LEAVE('n');
 566                 return NULL;
 567         }
 568
 569         // Initialise Structure
 570         pBinary->ReferenceCount = 0;
 571         pBinary->MountID = MountID;
 572         pBinary->Inode = Inode;
 573
 574         // Debug Information
 575         LOG("Interpreter: '%s'", pBinary->Interpreter);
 576         LOG("Base: 0x%x, Entry: 0x%x", pBinary->Base, pBinary->Entry);
 577         LOG("NumSections: %i", pBinary->NumSections);
 578
 579         // Add to the list
 580         SHORTLOCK(&glBinListLock);
 581         pBinary->Next = glLoadedBinaries;
 582         glLoadedBinaries = pBinary;
 583         SHORTREL(&glBinListLock);
 584
 585         // TODO: Register the path with the binary
 586
 587         // Return
 588         LEAVE('p', pBinary);
 589         return pBinary;
 590 }
 591
 592 /**
 593  * \fn void Binary_Unload(void *Base)
 594  * \brief Unload / Unmap a binary
 595  * \param Base  Loaded Base
 596  * \note Currently used only for kernel libaries
 597  */
 598 void Binary_Unload(void *Base)
 599 {
 600         tKernelBin      *pKBin;
 601         tKernelBin      *prev = NULL;
 602          int    i;
 603
 604         if((Uint)Base < 0xC0000000)
 605         {
 606                 // TODO: User Binaries
 607                 Log_Warning("BIN", "Unloading user binaries is currently unimplemented");
 608                 return;
 609         }
 610
 611         // Kernel Libraries
 612         for(pKBin = glLoadedKernelLibs;
 613                 pKBin;
 614                 prev = pKBin, pKBin = pKBin->Next)
 615         {
 616                 // Check the base
 617                 if(pKBin->Base != Base) continue;
 618                 // Deallocate Memory
 619                 for(i = 0; i < pKBin->Info->NumSections; i++)
 620                 {
 621                         // TODO: VFS_MUnmap();
 622                 }
 623                 // Dereference Binary
 624                 Binary_Dereference( pKBin->Info );
 625                 // Remove from list
 626                 if(prev)        prev->Next = pKBin->Next;
 627                 else            glLoadedKernelLibs = pKBin->Next;
 628                 // Free Kernel Lib
 629                 free(pKBin);
 630                 return;
 631         }
 632 }
 633
 634 /**
 635  * \fn void Binary_Dereference(tBinary *Info)
 636  * \brief Dereferences and if nessasary, deletes a binary
 637  * \param Info  Binary information structure
 638  */
 639 void Binary_Dereference(tBinary *Info)
 640 {
 641         // Decrement reference count
 642         Info->ReferenceCount --;
 643
 644         // Check if it is still in use
 645         if(Info->ReferenceCount)        return;
 646
 647         /// \todo Implement binary freeing
 648 }
 649
 650 /**
 651  * \fn char *Binary_RegInterp(char *Path)
 652  * \brief Registers an Interpreter
 653  * \param Path  Path to interpreter provided by executable
 654  */
 655 char *Binary_RegInterp(char *Path)
 656 {
 657          int    i;
 658         // NULL Check Argument
 659         if(Path == NULL)        return NULL;
 660         // NULL Check the array
 661         if(gsaRegInterps == NULL)
 662         {
 663                 giRegInterps = 1;
 664                 gsaRegInterps = malloc( sizeof(char*) );
 665                 gsaRegInterps[0] = malloc( strlen(Path) );
 666                 strcpy(gsaRegInterps[0], Path);
 667                 return gsaRegInterps[0];
 668         }
 669
 670         // Scan Array
 671         for( i = 0; i < giRegInterps; i++ )
 672         {
 673                 if(strcmp(gsaRegInterps[i], Path) == 0)
 674                         return gsaRegInterps[i];
 675         }
 676
 677         // Interpreter is not in list
 678         giRegInterps ++;
 679         gsaRegInterps = malloc( sizeof(char*)*giRegInterps );
 680         gsaRegInterps[i] = malloc( strlen(Path) );
 681         strcpy(gsaRegInterps[i], Path);
 682         return gsaRegInterps[i];
 683 }
 684
 685 // ============
 686 // Kernel Binary Handling
 687 // ============
 688 /**
 689  * \fn void *Binary_LoadKernel(const char *File)
 690  * \brief Load a binary into kernel space
 691  * \note This function shares much with #Binary_Load, but does it's own mapping
 692  * \param File  File to load into the kernel
 693  */
 694 void *Binary_LoadKernel(const char *File)
 695 {
 696         tBinary *pBinary;
 697         tKernelBin      *pKBinary;
 698         tVAddr  base = -1;
 699         tMount  mount_id;
 700         tInode  inode;
 701
 702         ENTER("sFile", File);
 703
 704         // Sanity Check Argument
 705         if(File == NULL) {
 706                 LEAVE('n');
 707                 return 0;
 708         }
 709
 710         {
 711                 int fd = VFS_Open(File, VFS_OPENFLAG_READ);
 712                 tFInfo  info;
 713                 if(fd == -1) {
 714                         LOG("Opening failed");
 715                         LEAVE('n');
 716                         return NULL;
 717                 }
 718                 VFS_FInfo(fd, &info, 0);
 719                 mount_id = info.mount;
 720                 inode = info.inode;
 721                 VFS_Close(fd);
 722                 LOG("Mount %i, Inode %lli", mount_id, inode);
 723         }
 724
 725         // Check if the binary has already been loaded
 726         if( (pBinary = Binary_GetInfo(mount_id, inode)) )
 727         {
 728                 for(pKBinary = glLoadedKernelLibs;
 729                         pKBinary;
 730                         pKBinary = pKBinary->Next )
 731                 {
 732                         if(pKBinary->Info == pBinary) {
 733                                 LOG("Already loaded");
 734                                 LEAVE('p', pKBinary->Base);
 735                                 return pKBinary->Base;
 736                         }
 737                 }
 738         }
 739         else
 740                 pBinary = Binary_DoLoad(mount_id, inode, File); // Else load it
 741
 742         // Error Check
 743         if(pBinary == NULL) {
 744                 LEAVE('n');
 745                 return NULL;
 746         }
 747
 748         LOG("Loaded as %p", pBinary);
 749         // --------------
 750         // Now pBinary is valid (either freshly loaded or only user mapped)
 751         // So, map it into kernel space
 752         // --------------
 753
 754         // Reference Executable (Makes sure that it isn't unloaded)
 755         pBinary->ReferenceCount ++;
 756
 757         base = Binary_MapIn(pBinary, File, KLIB_LOWEST, KLIB_HIGHEST);
 758         if( base == 0 ) {
 759                 LEAVE('n');
 760                 return 0;
 761         }
 762
 763         // Add to list
 764         // TODO: Could this cause race conditions if a binary isn't fully loaded when used
 765         pKBinary = malloc(sizeof(*pKBinary));
 766         pKBinary->Base = (void*)base;
 767         pKBinary->Info = pBinary;
 768         SHORTLOCK( &glKBinListLock );
 769         pKBinary->Next = glLoadedKernelLibs;
 770         glLoadedKernelLibs = pKBinary;
 771         SHORTREL( &glKBinListLock );
 772
 773         LEAVE('p', base);
 774         return (void*)base;
 775 }
 776
 777 /**
 778  * \fn Uint Binary_Relocate(void *Base)
 779  * \brief Relocates a loaded binary (used by kernel libraries)
 780  * \param Base  Loaded base address of binary
 781  * \return Boolean Success
 782  */
 783 Uint Binary_Relocate(void *Base)
 784 {
 785         Uint32  ident = *(Uint32*) Base;
 786         tBinaryType     *bt = gRegBinTypes;
 787
 788         for( ; bt; bt = bt->Next)
 789         {
 790                 if( (ident & bt->Mask) == (Uint)bt->Ident )
 791                         return bt->Relocate( (void*)Base);
 792         }
 793
 794         Log_Warning("BIN", "%p is an unknown file type. (%02x %02x %02x %02x)",
 795                 Base, ident&0xFF, (ident>>8)&0xFF, (ident>>16)&0xFF, (ident>>24)&0xFF);
 796         return 0;
 797 }
 798
 799 /**
 800  * \fn int Binary_GetSymbol(char *Name, Uint *Val)
 801  * \brief Get a symbol value
 802  * \return Value of symbol or -1 on error
 803  *
 804  * Gets the value of a symbol from either the currently loaded
 805  * libraries or the kernel's exports.
 806  */
 807 int Binary_GetSymbol(const char *Name, Uint *Val)
 808 {
 809         if( Binary_GetSymbolEx(Name, Val) )     return 1;
 810         return 0;
 811 }
 812
 813 /**
 814  * \fn Uint Binary_GetSymbolEx(char *Name, Uint *Value)
 815  * \brief Get a symbol value
 816  *
 817  * Gets the value of a symbol from either the currently loaded
 818  * libraries or the kernel's exports.
 819  */
 820 Uint Binary_GetSymbolEx(const char *Name, Uint *Value)
 821 {
 822          int    i;
 823         tKernelBin      *pKBin;
 824          int    numKSyms = ((Uint)&gKernelSymbolsEnd-(Uint)&gKernelSymbols)/sizeof(tKernelSymbol);
 825
 826         LOG("numKSyms = %i", numKSyms);
 827
 828         // Scan Kernel
 829         for( i = 0; i < numKSyms; i++ )
 830         {
 831                 LOG("KSym %s = %p", gKernelSymbols[i].Name, gKernelSymbols[i].Value);
 832                 if(strcmp(Name, gKernelSymbols[i].Name) == 0) {
 833                         *Value = gKernelSymbols[i].Value;
 834                         return 1;
 835                 }
 836         }
 837
 838         // Scan Loaded Libraries
 839         for(pKBin = glLoadedKernelLibs;
 840                 pKBin;
 841                 pKBin = pKBin->Next )
 842         {
 843                 if( Binary_FindSymbol(pKBin->Base, Name, Value) ) {
 844                         return 1;
 845                 }
 846         }
 847
 848         Log_Warning("BIN", "Unable to find symbol '%s'", Name);
 849         return 0;
 850 }
 851
 852 /**
 853  * \fn Uint Binary_FindSymbol(void *Base, char *Name, Uint *Val)
 854  * \brief Get a symbol from the specified library
 855  * \param Base  Base address
 856  * \param Name  Name of symbol to find
 857  * \param Val   Pointer to place final value
 858  */
 859 Uint Binary_FindSymbol(void *Base, const char *Name, Uint *Val)
 860 {
 861         Uint32  ident = *(Uint32*) Base;
 862         tBinaryType     *bt = gRegBinTypes;
 863
 864         for(; bt; bt = bt->Next)
 865         {
 866                 if( (ident & bt->Mask) == (Uint)bt->Ident )
 867                         return bt->GetSymbol(Base, Name, Val);
 868         }
 869
 870         Log_Warning("BIN", "Binary_FindSymbol - %p is an unknown file type. (%02x %02x %02x %02x)",
 871                 Base, ident&0xFF, ident>>8, ident>>16, ident>>24);
 872         return 0;
 873 }
 874
 875 /**
 876  * \brief Check if a range of memory is fully free
 877  * \return Inverse boolean free (0 if all pages are unmapped)
 878  */
 879 int Binary_int_CheckMemFree( tVAddr _start, size_t _len )
 880 {
 881         ENTER("p_start x_len", _start, _len);
 882
 883         _len += _start & (PAGE_SIZE-1);
 884         _len = (_len + PAGE_SIZE - 1) & ~(PAGE_SIZE-1);
 885         _start &= ~(PAGE_SIZE-1);
 886         LOG("_start = %p, _len = 0x%x", _start, _len);
 887         for( ; _len > PAGE_SIZE; _len -= PAGE_SIZE, _start += PAGE_SIZE ) {
 888                 if( MM_GetPhysAddr( (void*)_start ) != 0 ) {
 889                         LEAVE('i', 1);
 890                         return 1;
 891                 }
 892         }
 893         if( _len == PAGE_SIZE && MM_GetPhysAddr( (void*)_start ) != 0 ) {
 894                 LEAVE('i', 1);
 895                 return 1;
 896         }
 897         LEAVE('i', 0);
 898         return 0;
 899 }
 900
 901
 902 // === EXPORTS ===
 903 EXPORT(Binary_FindSymbol);
 904 EXPORT(Binary_Unload);