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