| 1 | /*␊ |
| 2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
| 7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
| 8 | * Original Code as defined in and that are subject to the Apple Public␊ |
| 9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
| 10 | * except in compliance with the License. Please obtain a copy of the␊ |
| 11 | * License at http://www.apple.com/publicsource and read it before using␊ |
| 12 | * this file.␊ |
| 13 | * ␊ |
| 14 | * The Original Code and all software distributed under the License are␊ |
| 15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
| 19 | * License for the specific language governing rights and limitations␊ |
| 20 | * under the License.␊ |
| 21 | * ␊ |
| 22 | * @APPLE_LICENSE_HEADER_END@␊ |
| 23 | */␊ |
| 24 | /* ␊ |
| 25 | * Mach Operating System␊ |
| 26 | * Copyright (c) 1990 Carnegie-Mellon University␊ |
| 27 | * Copyright (c) 1989 Carnegie-Mellon University␊ |
| 28 | * All rights reserved. The CMU software License Agreement specifies␊ |
| 29 | * the terms and conditions for use and redistribution.␊ |
| 30 | */␊ |
| 31 | ␊ |
| 32 | /*␊ |
| 33 | * INTEL CORPORATION PROPRIETARY INFORMATION␊ |
| 34 | *␊ |
| 35 | * This software is supplied under the terms of a license agreement or ␊ |
| 36 | * nondisclosure agreement with Intel Corporation and may not be copied ␊ |
| 37 | * nor disclosed except in accordance with the terms of that agreement.␊ |
| 38 | *␊ |
| 39 | * Copyright 1988, 1989 by Intel Corporation␊ |
| 40 | */␊ |
| 41 | ␊ |
| 42 | /*␊ |
| 43 | * Copyright 1993 NeXT Computer, Inc.␊ |
| 44 | * All rights reserved.␊ |
| 45 | */␊ |
| 46 | ␊ |
| 47 | /*␊ |
| 48 | * Completely reworked by Sam Streeper (sam_s@NeXT.com)␊ |
| 49 | * Reworked again by Curtis Galloway (galloway@NeXT.com)␊ |
| 50 | */␊ |
| 51 | ␊ |
| 52 | ␊ |
| 53 | #include "boot.h"␊ |
| 54 | #include "bootstruct.h"␊ |
| 55 | #include "fake_efi.h"␊ |
| 56 | #include "sl.h"␊ |
| 57 | #include "libsa.h"␊ |
| 58 | #include "ramdisk.h"␊ |
| 59 | #include "gui.h"␊ |
| 60 | #include "platform.h"␊ |
| 61 | #include "autoresolution.h" //autoresolution␊ |
| 62 | #include "edid.h"␉␉␉//␉␉||␊ |
| 63 | #include "modules.h"␊ |
| 64 | ␊ |
| 65 | long gBootMode; /* defaults to 0 == kBootModeNormal */␊ |
| 66 | bool gOverrideKernel;␊ |
| 67 | static char gBootKernelCacheFile[512];␊ |
| 68 | static char gCacheNameAdler[64 + 256];␊ |
| 69 | char *gPlatformName = gCacheNameAdler;␊ |
| 70 | char gRootDevice[512];␊ |
| 71 | char gMKextName[512];␊ |
| 72 | char gMacOSVersion[8];␊ |
| 73 | bool gEnableCDROMRescan;␊ |
| 74 | bool gScanSingleDrive;␊ |
| 75 | ␊ |
| 76 | int bvCount = 0;␊ |
| 77 | //int␉␉menucount = 0;␊ |
| 78 | int gDeviceCount = 0; ␊ |
| 79 | ␊ |
| 80 | BVRef bvr;␊ |
| 81 | BVRef menuBVR;␊ |
| 82 | BVRef bvChain;␊ |
| 83 | bool useGUI;␊ |
| 84 | ␊ |
| 85 | //static void selectBiosDevice(void);␊ |
| 86 | static unsigned long Adler32(unsigned char *buffer, long length);␊ |
| 87 | static bool checkOSVersion(const char * version);␊ |
| 88 | static bool getOSVersion();␊ |
| 89 | ␊ |
| 90 | static bool gUnloadPXEOnExit = false;␊ |
| 91 | ␊ |
| 92 | /*␊ |
| 93 | * How long to wait (in seconds) to load the␊ |
| 94 | * kernel after displaying the "boot:" prompt.␊ |
| 95 | */␊ |
| 96 | #define kBootErrorTimeout 5␊ |
| 97 | ␊ |
| 98 | /*␊ |
| 99 | * Default path to kernel cache file␊ |
| 100 | */␊ |
| 101 | //Slice - first one for Leopard␊ |
| 102 | #define kDefaultCachePathLeo "/System/Library/Caches/com.apple.kernelcaches/"␊ |
| 103 | #define kDefaultCachePathSnow "/System/Library/Caches/com.apple.kext.caches/Startup/"␊ |
| 104 | ␊ |
| 105 | //==========================================================================␊ |
| 106 | // Zero the BSS.␊ |
| 107 | ␊ |
| 108 | static void zeroBSS(void)␊ |
| 109 | {␊ |
| 110 | ␉extern char _DATA__bss__begin, _DATA__bss__end;␊ |
| 111 | ␉extern char _DATA__common__begin, _DATA__common__end;␊ |
| 112 | ␊ |
| 113 | ␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊ |
| 114 | ␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊ |
| 115 | }␊ |
| 116 | ␊ |
| 117 | //==========================================================================␊ |
| 118 | // Malloc error function␊ |
| 119 | ␊ |
| 120 | static void malloc_error(char *addr, size_t size, const char *file, int line)␊ |
| 121 | {␊ |
| 122 | ␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊ |
| 123 | }␊ |
| 124 | ␊ |
| 125 | //==========================================================================␊ |
| 126 | //Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊ |
| 127 | //␊ |
| 128 | void initialize_runtime(void)␊ |
| 129 | {␊ |
| 130 | ␉zeroBSS();␊ |
| 131 | ␉malloc_init(0, 0, 0, malloc_error);␊ |
| 132 | }␊ |
| 133 | ␊ |
| 134 | //==========================================================================␊ |
| 135 | // execKernel - Load the kernel image (mach-o) and jump to its entry point.␊ |
| 136 | ␊ |
| 137 | static int ExecKernel(void *binary)␊ |
| 138 | {␊ |
| 139 | ␉entry_t␉␉␉␉␉ kernelEntry;␊ |
| 140 | ␉int␉␉␉␉␉␉ ret;␊ |
| 141 | ␉␊ |
| 142 | ␉bootArgs->kaddr = bootArgs->ksize = 0;␊ |
| 143 | ␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊ |
| 144 | ␉␊ |
| 145 | ␉ret = DecodeKernel(binary,␊ |
| 146 | ␉␉␉␉␉ &kernelEntry,␊ |
| 147 | ␉␉␉␉␉ (char **) &bootArgs->kaddr,␊ |
| 148 | ␉␉␉␉␉ (int *)&bootArgs->ksize );␊ |
| 149 | ␉␊ |
| 150 | ␉if ( ret != 0 )␊ |
| 151 | ␉␉return ret;␊ |
| 152 | ␉␊ |
| 153 | ␉// Reserve space for boot args␊ |
| 154 | ␉reserveKernBootStruct();␊ |
| 155 | ␉␊ |
| 156 | ␉// Notify modules that the kernel has been decoded␊ |
| 157 | ␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊ |
| 158 | ␉␊ |
| 159 | ␉// Load boot drivers from the specifed root path.␊ |
| 160 | ␉LoadDrivers("/");␊ |
| 161 | ␉␊ |
| 162 | ␉␊ |
| 163 | ␉clearActivityIndicator();␊ |
| 164 | ␉␊ |
| 165 | ␉if (gErrors) {␊ |
| 166 | ␉␉printf("Errors encountered while starting up the computer.\n");␊ |
| 167 | ␉␉printf("Pausing %d seconds...\n", kBootErrorTimeout);␊ |
| 168 | ␉␉sleep(kBootErrorTimeout);␊ |
| 169 | ␉}␊ |
| 170 | ␉␊ |
| 171 | ␉setupFakeEfi();␊ |
| 172 | ␉␊ |
| 173 | ␉md0Ramdisk();␊ |
| 174 | ␉␊ |
| 175 | ␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊ |
| 176 | ␉␊ |
| 177 | ␉// Cleanup the PXE base code.␊ |
| 178 | ␉␊ |
| 179 | ␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊ |
| 180 | ␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊ |
| 181 | ␉␉{␊ |
| 182 | ␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊ |
| 183 | ␉␉␉sleep(2);␊ |
| 184 | ␉␉}␊ |
| 185 | ␉}␊ |
| 186 | ␉␊ |
| 187 | ␉bool dummyVal;␊ |
| 188 | ␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊ |
| 189 | ␉␉printf("Press any key to continue...");␊ |
| 190 | ␉␉getchar();␊ |
| 191 | ␉}␊ |
| 192 | ␉␊ |
| 193 | ␉usb_loop();␊ |
| 194 | ␉␊ |
| 195 | //autoresolution - Check if user disabled AutoResolution at the boot prompt.␊ |
| 196 | ␉getBoolForKey(kAutoResolutionKey, &gAutoResolution, &bootInfo->bootConfig); //Azi: bootConfig ??␊ |
| 197 | ␉␊ |
| 198 | ␉// User disabled AutoResolution at boot prompt...␊ |
| 199 | ␉if ((gAutoResolution == false) && map)␊ |
| 200 | ␉{␊ |
| 201 | ␉␉// restore and close Vbios for patch cancelation.␊ |
| 202 | ␉␉restoreVbios(map);␊ |
| 203 | ␉␉closeVbios(map);␊ |
| 204 | ␉}␊ |
| 205 | ␉␊ |
| 206 | ␉//Azi: while testing, i didn't got any problems when booting without␊ |
| 207 | ␉// closing Vbios... closing it just in case. (check again later!)␊ |
| 208 | ␉if ((gAutoResolution == true) && map)␊ |
| 209 | ␉{␊ |
| 210 | ␉␉closeVbios(map);␊ |
| 211 | ␊ |
| 212 | ␉␉// gAutoResolution was just set to false on closeVbios();␊ |
| 213 | ␉␉// we need it to be "true" for drawBootGraphics().␊ |
| 214 | ␉␉gAutoResolution = true;␊ |
| 215 | ␉}␊ |
| 216 | ␉␊ |
| 217 | ␉//Azi: closing Vbios after "if (gVerboseMode)" stuff eliminates the need for setting␊ |
| 218 | ␉// AutoResolution = true above; but creates another bug when booting in TextMode with -v arg.␊ |
| 219 | ␉// Simptoms include: staring some seconds at a nicely drawn white screen, after boot prompt.␊ |
| 220 | ␉// Think i'm just going to end up removing setting gAutoResolution = false␊ |
| 221 | ␉// on closeVbios().. the more i think, the less sense it makes doing it there!!␊ |
| 222 | //autoresolution - end␊ |
| 223 | ␉␊ |
| 224 | if (checkOSVersion("10.7"))␊ |
| 225 | {␊ |
| 226 | execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊ |
| 227 | }␊ |
| 228 | else␊ |
| 229 | {␊ |
| 230 | execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␉// Notify modules that the kernel is about to be started␊ |
| 231 | }␊ |
| 232 | ␊ |
| 233 | ␉// If we were in text mode, switch to graphics mode.␊ |
| 234 | ␉// This will draw the boot graphics unless we are in␊ |
| 235 | ␉// verbose mode.␊ |
| 236 | ␉␊ |
| 237 | ␉if(gVerboseMode)␊ |
| 238 | ␉ setVideoMode( GRAPHICS_MODE, 0 );␊ |
| 239 | ␉else␊ |
| 240 | ␉ drawBootGraphics();␊ |
| 241 | ␉␊ |
| 242 | ␉setupBooterLog();␊ |
| 243 | ␉␊ |
| 244 | ␉finalizeBootStruct();␊ |
| 245 | ␉␊ |
| 246 | if (checkOSVersion("10.7")) {␊ |
| 247 | ␉␉␊ |
| 248 | ␉␉// Masking out so that Lion doesn't doublefault␊ |
| 249 | ␉␉outb(0x21, 0xff);␉/* Maskout all interrupts Pic1 */␊ |
| 250 | ␉␉outb(0xa1, 0xff);␉/* Maskout all interrupts Pic2 */␊ |
| 251 | ␉␉␊ |
| 252 | ␉␉// Jump to kernel's entry point. There's no going back now.␊ |
| 253 | ␉␉␊ |
| 254 | ␉␉startprog( kernelEntry, bootArgs );␊ |
| 255 | ␉}␊ |
| 256 | ␉else {␊ |
| 257 | ␉␉// Jump to kernel's entry point. There's no going back now.␊ |
| 258 | ␉␉␊ |
| 259 | ␉␉startprog( kernelEntry, bootArgsPreLion );␊ |
| 260 | ␉}␊ |
| 261 | ␉␊ |
| 262 | ␉// Not reached␊ |
| 263 | ␉return 0;␊ |
| 264 | }␊ |
| 265 | ␊ |
| 266 | //==========================================================================␊ |
| 267 | // This is the entrypoint from real-mode which functions exactly as it did␊ |
| 268 | // before. Multiboot does its own runtime initialization, does some of its␊ |
| 269 | // own things, and then calls common_boot.␊ |
| 270 | void boot(int biosdev)␊ |
| 271 | {␊ |
| 272 | ␉initialize_runtime();␊ |
| 273 | ␉// Enable A20 gate before accessing memory above 1Mb.␊ |
| 274 | ␉enableA20();␊ |
| 275 | ␉common_boot(biosdev);␊ |
| 276 | }␊ |
| 277 | ␊ |
| 278 | //==========================================================================␊ |
| 279 | // The 'main' function for the booter. Called by boot0 when booting␊ |
| 280 | // from a block device, or by the network booter.␊ |
| 281 | //␊ |
| 282 | // arguments:␊ |
| 283 | // biosdev - Value passed from boot1/NBP to specify the device␊ |
| 284 | // that the booter was loaded from.␊ |
| 285 | //␊ |
| 286 | // If biosdev is kBIOSDevNetwork, then this function will return if␊ |
| 287 | // booting was unsuccessful. This allows the PXE firmware to try the␊ |
| 288 | // next boot device on its list.␊ |
| 289 | void common_boot(int biosdev)␊ |
| 290 | {␊ |
| 291 | int status;␊ |
| 292 | char *bootFile;␊ |
| 293 | unsigned long adler32;␊ |
| 294 | bool quiet;␊ |
| 295 | bool firstRun = true;␊ |
| 296 | bool instantMenu;␊ |
| 297 | bool rescanPrompt;␊ |
| 298 | unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊ |
| 299 | unsigned int denyBVFlags = kBVFlagEFISystem;␊ |
| 300 | ␊ |
| 301 | // Set reminder to unload the PXE base code. Neglect to unload␊ |
| 302 | // the base code will result in a hang or kernel panic.␊ |
| 303 | gUnloadPXEOnExit = true;␊ |
| 304 | ␊ |
| 305 | // Record the device that the booter was loaded from.␊ |
| 306 | gBIOSDev = biosdev & kBIOSDevMask;␊ |
| 307 | ␊ |
| 308 | // Initialize boot info structure.␊ |
| 309 | initKernBootStruct();␊ |
| 310 | ␊ |
| 311 | ␉initBooterLog();␊ |
| 312 | ␊ |
| 313 | // Setup VGA text mode.␊ |
| 314 | // Not sure if it is safe to call setVideoMode() before the␊ |
| 315 | // config table has been loaded. Call video_mode() instead.␊ |
| 316 | #if DEBUG␊ |
| 317 | printf("before video_mode\n");␊ |
| 318 | #endif␊ |
| 319 | video_mode( 2 ); // 80x25 mono text mode.␊ |
| 320 | #if DEBUG␊ |
| 321 | printf("after video_mode\n");␊ |
| 322 | #endif␊ |
| 323 | ␊ |
| 324 | // Scan and record the system's hardware information.␊ |
| 325 | scan_platform();␊ |
| 326 | ␊ |
| 327 | // First get info for boot volume.␊ |
| 328 | scanBootVolumes(gBIOSDev, 0);␊ |
| 329 | bvChain = getBVChainForBIOSDev(gBIOSDev);␊ |
| 330 | setBootGlobals(bvChain);␊ |
| 331 | ␊ |
| 332 | // Load boot.plist config file␊ |
| 333 | status = loadSystemConfig(&bootInfo->bootConfig);␊ |
| 334 | ␊ |
| 335 | if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊ |
| 336 | gBootMode |= kBootModeQuiet;␊ |
| 337 | }␊ |
| 338 | ␊ |
| 339 | // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊ |
| 340 | if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊ |
| 341 | firstRun = false;␊ |
| 342 | }␊ |
| 343 | ␊ |
| 344 | // Loading preboot ramdisk if exists.␊ |
| 345 | loadPrebootRAMDisk();␊ |
| 346 | ␊ |
| 347 | // Disable rescan option by default␊ |
| 348 | gEnableCDROMRescan = false;␊ |
| 349 | ␊ |
| 350 | // Enable it with Rescan=y in system config␊ |
| 351 | if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊ |
| 352 | gEnableCDROMRescan = true;␊ |
| 353 | }␊ |
| 354 | ␊ |
| 355 | // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊ |
| 356 | rescanPrompt = false;␊ |
| 357 | if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊ |
| 358 | gEnableCDROMRescan = promptForRescanOption();␊ |
| 359 | }␊ |
| 360 | ␊ |
| 361 | // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊ |
| 362 | if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊ |
| 363 | gScanSingleDrive = true;␊ |
| 364 | }␊ |
| 365 | ␊ |
| 366 | // Create a list of partitions on device(s).␊ |
| 367 | if (gScanSingleDrive) {␊ |
| 368 | scanBootVolumes(gBIOSDev, &bvCount);␊ |
| 369 | } else {␊ |
| 370 | scanDisks(gBIOSDev, &bvCount);␊ |
| 371 | }␊ |
| 372 | ␊ |
| 373 | // Create a separated bvr chain using the specified filters.␊ |
| 374 | bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊ |
| 375 | ␊ |
| 376 | gBootVolume = selectBootVolume(bvChain);␊ |
| 377 | ␊ |
| 378 | ␉// Intialize module system ␊ |
| 379 | ␉init_module_system();␊ |
| 380 | ␉␊ |
| 381 | #if DEBUG␊ |
| 382 | printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊ |
| 383 | printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊ |
| 384 | getchar();␊ |
| 385 | #endif␊ |
| 386 | ␊ |
| 387 | ␉useGUI = true;␊ |
| 388 | ␉// Override useGUI default␊ |
| 389 | ␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊ |
| 390 | ␉␊ |
| 391 | //autoresolution - default to false␊ |
| 392 | ␉// http://forum.voodooprojects.org/index.php/topic,1227.0.html␊ |
| 393 | ␉gAutoResolution = false;␊ |
| 394 | ␊ |
| 395 | ␉// Check if user enabled AutoResolution on Boot.plist...␊ |
| 396 | ␉getBoolForKey(kAutoResolutionKey, &gAutoResolution, &bootInfo->bootConfig);␊ |
| 397 | ␊ |
| 398 | ␉// Patch the Video Bios with the extracted resolution, before initGui.␊ |
| 399 | ␉if (gAutoResolution == true)␊ |
| 400 | ␉{␊ |
| 401 | ␉␉paramsAR[3] = 0;␊ |
| 402 | ␊ |
| 403 | ␉␉// Open the Vbios and store Vbios or Tables␊ |
| 404 | ␉␉//Azi: doing this only if gAutoResolution = true␊ |
| 405 | ␉␉map = openVbios(CT_UNKWN);␊ |
| 406 | ␊ |
| 407 | ␉␉//Get resolution from Graphics Mode key...␊ |
| 408 | ␉␉int count = getNumberArrayFromProperty(kGraphicsModeKey, paramsAR, 4);␊ |
| 409 | ␉␉// ... or EDID.␊ |
| 410 | ␉␉if (count < 3)␊ |
| 411 | ␉␉{␊ |
| 412 | ␉␉␉getResolution(paramsAR); //Azi: hum...␊ |
| 413 | ␉␉␉// check the DEBUG/PRINT stuff... also on TEXT MODE (this is not printing to screen). ???␊ |
| 414 | ␉␉␉// don't forget we now have boot-log and it prints fine there.␊ |
| 415 | //Azi:autoresolution - these PRINT replace a previous existing #ifdef AUTORES_DEBUG␊ |
| 416 | // and were moved from gui.c, initGUI().␊ |
| 417 | ␉␉␉PRINT("Resolution: %dx%d (EDID)\n",paramsAR[0], paramsAR[1]);␊ |
| 418 | ␉␉}␊ |
| 419 | ␉␉else //Azi: check theme.plist ??␊ |
| 420 | ␉␉{␊ |
| 421 | ␉␉␉PRINT("Resolution: %dx%d (Graphics Mode key)\n",paramsAR[0], paramsAR[1]);␊ |
| 422 | ␊ |
| 423 | ␉␉␉//Azi: hum...␊ |
| 424 | ␉␉␉if ( paramsAR[2] == 256 ) paramsAR[2] = 8;␊ |
| 425 | ␉␉␉if ( paramsAR[2] == 555 ) paramsAR[2] = 16;␊ |
| 426 | ␉␉␉if ( paramsAR[2] == 888 ) paramsAR[2] = 32;␊ |
| 427 | ␉␉}␊ |
| 428 | ␊ |
| 429 | ␉␉// perfom the actual Vbios patching␊ |
| 430 | ␉␉if (paramsAR[0] != 0 && paramsAR[1] != 0)␊ |
| 431 | ␉␉{␊ |
| 432 | ␉␉␉patchVbios(map, paramsAR[0], paramsAR[1], paramsAR[2], 0, 0);␊ |
| 433 | ␉␉}␊ |
| 434 | ␊ |
| 435 | ␉␉//Azi: passing resolution for TEXT MODE "verbose" boot. (check again later!)***␊ |
| 436 | ␉␉if (bootArgs->Video.v_display == VGA_TEXT_MODE)␊ |
| 437 | ␉␉{␊ |
| 438 | ␉␉␉gui.screen.width = paramsAR[0];␊ |
| 439 | ␉␉␉gui.screen.height = paramsAR[1];␊ |
| 440 | ␉␉}␊ |
| 441 | ␊ |
| 442 | ␉␉// If the patch is working properly, we're almost done (we need? to close Vbios).␊ |
| 443 | ␉␉// If not and it's just a matter of wrong resolution, we can try re-apply the patch;␊ |
| 444 | ␉␉// see "case kF2Key:", options.c.␊ |
| 445 | ␉}␊ |
| 446 | //autoresolution - end␊ |
| 447 | ␉␊ |
| 448 | ␉if (useGUI && initGUI())␊ |
| 449 | ␉{␊ |
| 450 | ␉␉// initGUI() returned with an error, disabling GUI.␊ |
| 451 | ␉␉useGUI = false;␊ |
| 452 | ␉}␊ |
| 453 | ␊ |
| 454 | setBootGlobals(bvChain);␊ |
| 455 | ␊ |
| 456 | // Parse args, load and start kernel.␊ |
| 457 | while (1) {␊ |
| 458 | const char *val;␊ |
| 459 | int len;␊ |
| 460 | int trycache;␊ |
| 461 | long flags, cachetime, kerneltime, exttime, sleeptime, time;␊ |
| 462 | int ret = -1;␊ |
| 463 | void *binary = (void *)kLoadAddr;␊ |
| 464 | bool tryresume;␊ |
| 465 | bool tryresumedefault;␊ |
| 466 | bool forceresume;␊ |
| 467 | ␉␉bool usecache;␊ |
| 468 | ␊ |
| 469 | // additional variable for testing alternate kernel image locations on boot helper partitions.␊ |
| 470 | char bootFileSpec[512];␊ |
| 471 | ␉␉␊ |
| 472 | // Initialize globals.␊ |
| 473 | ␊ |
| 474 | sysConfigValid = false;␊ |
| 475 | gErrors = false;␊ |
| 476 | ␊ |
| 477 | status = getBootOptions(firstRun);␊ |
| 478 | firstRun = false;␊ |
| 479 | if (status == -1) continue;␊ |
| 480 | ␉␉ ␊ |
| 481 | status = processBootOptions();␊ |
| 482 | // Status==1 means to chainboot␊ |
| 483 | if ( status == 1 ) break;␊ |
| 484 | // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊ |
| 485 | if ( status == -1 )␊ |
| 486 | {␊ |
| 487 | // gBootVolume == NULL usually means the user hit escape.␊ |
| 488 | if(gBootVolume == NULL)␊ |
| 489 | {␊ |
| 490 | freeFilteredBVChain(bvChain);␊ |
| 491 | ␊ |
| 492 | if (gEnableCDROMRescan)␊ |
| 493 | rescanBIOSDevice(gBIOSDev);␊ |
| 494 | ␊ |
| 495 | bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊ |
| 496 | setBootGlobals(bvChain);␊ |
| 497 | setupDeviceList(&bootInfo->themeConfig);␊ |
| 498 | }␊ |
| 499 | continue;␊ |
| 500 | }␊ |
| 501 | ␉␉␊ |
| 502 | // Other status (e.g. 0) means that we should proceed with boot.␊ |
| 503 | ␉␉␊ |
| 504 | ␉␉// Turn off any GUI elements␊ |
| 505 | ␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊ |
| 506 | ␉␉{␊ |
| 507 | ␉␉␉gui.devicelist.draw = false;␊ |
| 508 | ␉␉␉gui.bootprompt.draw = false;␊ |
| 509 | ␉␉␉gui.menu.draw = false;␊ |
| 510 | ␉␉␉gui.infobox.draw = false;␊ |
| 511 | ␉␉␉gui.logo.draw = false;␊ |
| 512 | ␉␉␉drawBackground();␊ |
| 513 | ␉␉␉updateVRAM();␊ |
| 514 | ␉␉}␊ |
| 515 | ␉␉␊ |
| 516 | ␉␉//Azi: autoresolution stuff moved to ExecKernel();␊ |
| 517 | ␉␉// Closing Vbios here without restoring it, causes an allocation error.␊ |
| 518 | ␉␉␊ |
| 519 | ␉␉// Find out which version mac os we're booting.␊ |
| 520 | ␉␉getOSVersion();␊ |
| 521 | ␊ |
| 522 | ␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊ |
| 523 | ␉␉␉archCpuType = CPU_TYPE_X86_64;␊ |
| 524 | ␉␉} else {␊ |
| 525 | ␉␉␉archCpuType = CPU_TYPE_I386;␊ |
| 526 | ␉␉}␊ |
| 527 | ␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊ |
| 528 | ␉␉␉if (strncmp(val, "i386", 4) == 0) {␊ |
| 529 | ␉␉␉␉archCpuType = CPU_TYPE_I386;␊ |
| 530 | ␉␉␉}␊ |
| 531 | ␉␉}␊ |
| 532 | ␊ |
| 533 | ␉␉// Notify moduals that we are attempting to boot␊ |
| 534 | ␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊ |
| 535 | ␊ |
| 536 | ␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊ |
| 537 | ␉␉␉tryresume = true;␊ |
| 538 | ␉␉␉tryresumedefault = true;␊ |
| 539 | ␉␉} else {␊ |
| 540 | ␉␉␉tryresumedefault = false;␊ |
| 541 | ␉␉}␊ |
| 542 | ␊ |
| 543 | ␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊ |
| 544 | ␉␉␉forceresume = false;␊ |
| 545 | ␉␉}␊ |
| 546 | ␉␉␊ |
| 547 | ␉␉if (forceresume) {␊ |
| 548 | ␉␉␉tryresume = true;␊ |
| 549 | ␉␉␉tryresumedefault = false;␊ |
| 550 | ␉␉}␊ |
| 551 | ␉␉␊ |
| 552 | ␉␉while (tryresume) {␊ |
| 553 | ␉␉␉const char *tmp;␊ |
| 554 | ␉␉␉BVRef bvr;␊ |
| 555 | ␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊ |
| 556 | ␉␉␉␉val="/private/var/vm/sleepimage";␊ |
| 557 | ␉␉␉␊ |
| 558 | ␉␉␉// Do this first to be sure that root volume is mounted␊ |
| 559 | ␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊ |
| 560 | ␊ |
| 561 | ␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊ |
| 562 | ␉␉␉␉break;␊ |
| 563 | ␉␉␉␊ |
| 564 | ␉␉␉// Can't check if it was hibernation Wake=y is required␊ |
| 565 | ␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊ |
| 566 | ␉␉␉␉break;␊ |
| 567 | ␉␉␉␊ |
| 568 | ␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊ |
| 569 | ␉␉␉␉break;␊ |
| 570 | ␉␉␉␊ |
| 571 | ␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊ |
| 572 | ␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊ |
| 573 | ␉␉␉␉break;␊ |
| 574 | ␉␉␉}␊ |
| 575 | ␉␉␉␉␊ |
| 576 | ␉␉␉HibernateBoot((char *)val);␊ |
| 577 | ␉␉␉break;␊ |
| 578 | ␉␉}␊ |
| 579 | ␉␉␊ |
| 580 | ␉␉if(getBoolForKey(kUseKernelCache, &usecache, &bootInfo->bootConfig) && usecache) {␊ |
| 581 | ␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊ |
| 582 | ␉␉␉␉strlcpy(gBootKernelCacheFile, val, len+1);␊ |
| 583 | ␉␉␉}␊ |
| 584 | ␉␉␉else {␊ |
| 585 | ␉␉␉␉//Lion␊ |
| 586 | ␉␉␉␉if (checkOSVersion("10.7")) {␊ |
| 587 | ␉␉␉␉␉sprintf(gBootKernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊ |
| 588 | ␉␉␉␉}␊ |
| 589 | ␉␉␉␉// Snow Leopard␊ |
| 590 | ␉␉␉␉else if (checkOSVersion("10.6")) {␊ |
| 591 | ␉␉␉␉␉sprintf(gBootKernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");␊ |
| 592 | ␉␉␉␉␉int lnam = sizeof(gBootKernelCacheFile) + 9; //with adler32␊ |
| 593 | ␉␉␉␉␉//Slice - TODO ???␊ |
| 594 | ␉␉␉␉␉// e.g. kernelcache_i386.E102928C.qSs0 = "unsaved" cache file.␊ |
| 595 | ␉␉␉␉␉//␊ |
| 596 | ␉␉␉␉␉// See kext_tools-180.2.1/kextcache_main.c:␊ |
| 597 | ␉␉␉␉␉// "Source directory has changed since starting; "␊ |
| 598 | ␉ // "not saving cache file %s."␊ |
| 599 | ␉␉␉␉␉// or␊ |
| 600 | ␉␉␉␉␉// "Source kernel has changed since starting; "␊ |
| 601 | ␉ // "not saving cache file %s."␊ |
| 602 | ␉␉␉␉␉␊ |
| 603 | ␉␉␉␉␉char* name;␊ |
| 604 | ␉␉␉␉␉long prev_time = 0;␊ |
| 605 | ␉␉␉␉␉␊ |
| 606 | ␉␉␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊ |
| 607 | ␉␉␉␉␉␊ |
| 608 | ␉␉␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊ |
| 609 | ␉␉␉␉␉{␊ |
| 610 | ␉␉␉␉␉␉if(((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time && strstr(name, gBootKernelCacheFile) && (name[lnam] != '.'))␊ |
| 611 | ␉␉␉␉␉␉{␊ |
| 612 | ␉␉␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊ |
| 613 | ␉␉␉␉␉␉␉prev_time = time;␊ |
| 614 | ␉␉␉␉␉␉}␊ |
| 615 | ␉␉␉␉␉}␊ |
| 616 | ␉␉␉␉}␊ |
| 617 | ␉␉␉␉else {␊ |
| 618 | ␉␉␉␉␉// Reset cache name.␊ |
| 619 | ␉␉␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊ |
| 620 | ␉␉␉␉␉␊ |
| 621 | ␉␉␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊ |
| 622 | ␉␉␉␉␉␊ |
| 623 | ␉␉␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊ |
| 624 | ␉␉␉␉␉␊ |
| 625 | ␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊ |
| 626 | ␉␉␉␉}␊ |
| 627 | ␉␉␉}␊ |
| 628 | ␉␉}␊ |
| 629 | ␉␉␉␊ |
| 630 | // Check for cache file.␊ |
| 631 | trycache = (usecache && ␊ |
| 632 | ␉␉␉␉␉((gBootMode & kBootModeSafe) == 0) &&␊ |
| 633 | !gOverrideKernel &&␊ |
| 634 | (gBootFileType == kBlockDeviceType) &&␊ |
| 635 | (gMKextName[0] == '\0') &&␊ |
| 636 | (gBootKernelCacheFile[0] != '\0'));␊ |
| 637 | ␊ |
| 638 | ␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊ |
| 639 | ␉␉␊ |
| 640 | if (trycache) do {␊ |
| 641 | ␊ |
| 642 | // if we haven't found the kernel yet, don't use the cache␊ |
| 643 | ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊ |
| 644 | if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊ |
| 645 | trycache = 0;␊ |
| 646 | break;␊ |
| 647 | }␊ |
| 648 | ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊ |
| 649 | if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊ |
| 650 | || (cachetime < kerneltime)) {␊ |
| 651 | trycache = 0;␊ |
| 652 | break;␊ |
| 653 | }␊ |
| 654 | ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊ |
| 655 | if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊ |
| 656 | && (cachetime < exttime)) {␊ |
| 657 | trycache = 0;␊ |
| 658 | break;␊ |
| 659 | }␊ |
| 660 | if (kerneltime > exttime) {␊ |
| 661 | exttime = kerneltime;␊ |
| 662 | }␊ |
| 663 | if (cachetime != (exttime + 1)) {␊ |
| 664 | trycache = 0;␊ |
| 665 | break;␊ |
| 666 | }␊ |
| 667 | } while (0);␊ |
| 668 | ␊ |
| 669 | do {␊ |
| 670 | if (trycache) {␊ |
| 671 | bootFile = gBootKernelCacheFile;␊ |
| 672 | ␊ |
| 673 | ␉␉␉␉verbose("Loading kernel cache %s\n", bootFile);␊ |
| 674 | ␊ |
| 675 | if (checkOSVersion("10.7")) {␊ |
| 676 | ret = LoadThinFatFile(bootFile, &binary);␊ |
| 677 | ␉␉␉␉}␊ |
| 678 | ␉␉␉␉else {␊ |
| 679 | ␉ret = LoadFile(bootFile);␊ |
| 680 | ␉␉␉␉␉binary = (void *)kLoadAddr;␊ |
| 681 | ␉␉␉␉}␊ |
| 682 | ␉␉␉␉␊ |
| 683 | if (ret >= 0)␊ |
| 684 | break;␊ |
| 685 | ␉␉␉␉␊ |
| 686 | ␉␉␉␉verbose("Kernel cache did not loaded %s\n ", bootFile);␊ |
| 687 | }␊ |
| 688 | ␉␉␉␊ |
| 689 | bootFile = bootInfo->bootFile;␊ |
| 690 | ␊ |
| 691 | // Try to load kernel image from alternate locations on boot helper partitions.␊ |
| 692 | sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊ |
| 693 | ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊ |
| 694 | ␉ ␉ if (ret == -1)␊ |
| 695 | ␉ ␉ {␊ |
| 696 | sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊ |
| 697 | ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊ |
| 698 | if (ret == -1)␊ |
| 699 | {␊ |
| 700 | sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊ |
| 701 | ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊ |
| 702 | if (ret == -1)␊ |
| 703 | {␊ |
| 704 | // No alternate location found, using the original kernel image path.␊ |
| 705 | strcpy(bootFileSpec, bootFile);␊ |
| 706 | }␊ |
| 707 | }␊ |
| 708 | }␊ |
| 709 | ␉␉␉␊ |
| 710 | if (checkOSVersion("10.7"))␊ |
| 711 | {␊ |
| 712 | //Lion, dont load kernel if haz cache␊ |
| 713 | if (!trycache) {␊ |
| 714 | ␉␉verbose("Loading kernel %s\n", bootFileSpec);␊ |
| 715 | ␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␊ |
| 716 | ␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊ |
| 717 | ␉␉␉archCpuType = CPU_TYPE_I386;␊ |
| 718 | ␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊ |
| 719 | ␉␉}␊ |
| 720 | ␉␉ } ␊ |
| 721 | ␉␉␉␉else ret = 1;␊ |
| 722 | } ␊ |
| 723 | ␉␉␉else {␊ |
| 724 | //Snow Leopard or older␊ |
| 725 | verbose("Loading kernel %s\n", bootFileSpec);␊ |
| 726 | ret = LoadThinFatFile(bootFileSpec, &binary);␊ |
| 727 | if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊ |
| 728 | archCpuType = CPU_TYPE_I386;␊ |
| 729 | ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊ |
| 730 | }␊ |
| 731 | }␊ |
| 732 | } while (0);␊ |
| 733 | ␊ |
| 734 | clearActivityIndicator();␊ |
| 735 | #if DEBUG␊ |
| 736 | printf("Pausing...");␊ |
| 737 | sleep(8);␊ |
| 738 | #endif␊ |
| 739 | ␊ |
| 740 | if (ret <= 0) {␊ |
| 741 | ␉␉␉printf("Can't find %s\n", bootFile);␊ |
| 742 | ␊ |
| 743 | ␉␉␉sleep(1);␊ |
| 744 | ␊ |
| 745 | if (gBootFileType == kNetworkDeviceType) {␊ |
| 746 | // Return control back to PXE. Don't unload PXE base code.␊ |
| 747 | gUnloadPXEOnExit = false;␊ |
| 748 | break;␊ |
| 749 | }␊ |
| 750 | } else {␊ |
| 751 | /* Won't return if successful. */␊ |
| 752 | ret = ExecKernel(binary);␊ |
| 753 | }␊ |
| 754 | }␊ |
| 755 | ␊ |
| 756 | // chainboot␊ |
| 757 | if (status==1) {␊ |
| 758 | ␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊ |
| 759 | ␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊ |
| 760 | ␉␉}␊ |
| 761 | }␊ |
| 762 | ␉␊ |
| 763 | if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊ |
| 764 | ␉␉nbpUnloadBaseCode();␊ |
| 765 | }␊ |
| 766 | }␊ |
| 767 | ␊ |
| 768 | /*!␊ |
| 769 | Selects a new BIOS device, taking care to update the global state appropriately.␊ |
| 770 | */␊ |
| 771 | /*␊ |
| 772 | static void selectBiosDevice(void)␊ |
| 773 | {␊ |
| 774 | struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊ |
| 775 | CacheReset();␊ |
| 776 | diskFreeMap(oldMap);␊ |
| 777 | oldMap = NULL;␊ |
| 778 | ␊ |
| 779 | int dev = selectAlternateBootDevice(gBIOSDev);␊ |
| 780 | ␊ |
| 781 | BVRef bvchain = scanBootVolumes(dev, 0);␊ |
| 782 | BVRef bootVol = selectBootVolume(bvchain);␊ |
| 783 | gBootVolume = bootVol;␊ |
| 784 | setRootVolume(bootVol);␊ |
| 785 | gBIOSDev = dev;␊ |
| 786 | }␊ |
| 787 | */␊ |
| 788 | ␊ |
| 789 | bool checkOSVersion(const char * version) ␊ |
| 790 | {␊ |
| 791 | ␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1]) && (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊ |
| 792 | }␊ |
| 793 | ␊ |
| 794 | bool getOSVersion()␊ |
| 795 | {␊ |
| 796 | ␉bool valid = false;␊ |
| 797 | ␉config_file_t systemVersion;␊ |
| 798 | ␉const char *val;␊ |
| 799 | ␉int len;␊ |
| 800 | ␉␊ |
| 801 | ␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊ |
| 802 | ␉{␊ |
| 803 | ␉␉valid = true;␊ |
| 804 | ␉}␊ |
| 805 | ␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊ |
| 806 | ␉{␊ |
| 807 | ␉␉valid = true;␊ |
| 808 | ␉}␊ |
| 809 | ␉␊ |
| 810 | ␉if (valid)␊ |
| 811 | ␉{␊ |
| 812 | ␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊ |
| 813 | ␉␉{␊ |
| 814 | ␉␉␉// getValueForKey uses const char for val␊ |
| 815 | ␉␉␉// so copy it and trim␊ |
| 816 | ␉␉␉*gMacOSVersion = '\0';␊ |
| 817 | ␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊ |
| 818 | ␉␉}␊ |
| 819 | ␉␉else␊ |
| 820 | ␉␉␉valid = false;␊ |
| 821 | ␉}␊ |
| 822 | ␉␊ |
| 823 | ␉return valid;␊ |
| 824 | }␊ |
| 825 | ␊ |
| 826 | #define BASE 65521L /* largest prime smaller than 65536 */␊ |
| 827 | #define NMAX 5000␊ |
| 828 | // NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊ |
| 829 | ␊ |
| 830 | #define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊ |
| 831 | #define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊ |
| 832 | #define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊ |
| 833 | #define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊ |
| 834 | #define DO16(buf) DO8(buf,0); DO8(buf,8);␊ |
| 835 | ␊ |
| 836 | unsigned long Adler32(unsigned char *buf, long len)␊ |
| 837 | {␊ |
| 838 | unsigned long s1 = 1; // adler & 0xffff;␊ |
| 839 | unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊ |
| 840 | unsigned long result;␊ |
| 841 | int k;␊ |
| 842 | ␊ |
| 843 | while (len > 0) {␊ |
| 844 | k = len < NMAX ? len : NMAX;␊ |
| 845 | len -= k;␊ |
| 846 | while (k >= 16) {␊ |
| 847 | DO16(buf);␊ |
| 848 | buf += 16;␊ |
| 849 | k -= 16;␊ |
| 850 | }␊ |
| 851 | if (k != 0) do {␊ |
| 852 | s1 += *buf++;␊ |
| 853 | s2 += s1;␊ |
| 854 | } while (--k);␊ |
| 855 | s1 %= BASE;␊ |
| 856 | s2 %= BASE;␊ |
| 857 | }␊ |
| 858 | result = (s2 << 16) | s1;␊ |
| 859 | return OSSwapHostToBigInt32(result);␊ |
| 860 | }␊ |
| 861 | |
