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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 "modules.h"␊
62␊
63long gBootMode; /* defaults to 0 == kBootModeNormal */␊
64bool gOverrideKernel;␊
65static char gBootKernelCacheFile[512];␊
66static char gCacheNameAdler[64 + 256];␊
67char *gPlatformName = gCacheNameAdler;␊
68char gRootDevice[512];␊
69char gMKextName[512];␊
70char gMacOSVersion[8];␊
71bool gEnableCDROMRescan;␊
72bool gScanSingleDrive;␊
73␊
74int bvCount = 0;␊
75//int␉␉menucount = 0;␊
76int gDeviceCount = 0; ␊
77␊
78BVRef bvr;␊
79BVRef menuBVR;␊
80BVRef bvChain;␊
81bool useGUI;␊
82␊
83//static void selectBiosDevice(void);␊
84static unsigned long Adler32(unsigned char *buffer, long length);␊
85static bool checkOSVersion(const char * version);␊
86static bool getOSVersion();␊
87␊
88static bool gUnloadPXEOnExit = false;␊
89␊
90/*␊
91 * How long to wait (in seconds) to load the␊
92 * kernel after displaying the "boot:" prompt.␊
93 */␊
94#define kBootErrorTimeout 5␊
95␊
96/*␊
97 * Default path to kernel cache file␊
98 */␊
99//Slice - first one for Leopard␊
100#define kDefaultCachePathLeo "/System/Library/Caches/com.apple.kernelcaches/"␊
101#define kDefaultCachePathSnow "/System/Library/Caches/com.apple.kext.caches/Startup/"␊
102␊
103//==========================================================================␊
104// Zero the BSS.␊
105␊
106static void zeroBSS(void)␊
107{␊
108␉extern char _DATA__bss__begin, _DATA__bss__end;␊
109␉extern char _DATA__common__begin, _DATA__common__end;␊
110␊
111␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
112␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
113}␊
114␊
115//==========================================================================␊
116// Malloc error function␊
117␊
118static void malloc_error(char *addr, size_t size, const char *file, int line)␊
119{␊
120␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
121}␊
122␊
123//==========================================================================␊
124//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
125//␊
126void initialize_runtime(void)␊
127{␊
128␉zeroBSS();␊
129␉malloc_init(0, 0, 0, malloc_error);␊
130}␊
131␊
132//==========================================================================␊
133// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
134␊
135static int ExecKernel(void *binary)␊
136{␊
137␉entry_t␉␉␉␉␉ kernelEntry;␊
138␉int␉␉␉␉␉␉ ret;␊
139␉␊
140␉bootArgs->kaddr = bootArgs->ksize = 0;␊
141␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
142␉␊
143␉ret = DecodeKernel(binary,␊
144␉␉␉␉␉ &kernelEntry,␊
145␉␉␉␉␉ (char **) &bootArgs->kaddr,␊
146␉␉␉␉␉ (int *)&bootArgs->ksize );␊
147␉␊
148␉if ( ret != 0 )␊
149␉␉return ret;␊
150␉␊
151␉// Reserve space for boot args␊
152␉reserveKernBootStruct();␊
153␉␊
154␉// Notify modules that the kernel has been decoded␊
155␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊
156␉␊
157␉// Load boot drivers from the specifed root path.␊
158␉LoadDrivers("/");␊
159␉␊
160␉␊
161␉clearActivityIndicator();␊
162␉␊
163␉if (gErrors) {␊
164␉␉printf("Errors encountered while starting up the computer.\n");␊
165␉␉printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
166␉␉sleep(kBootErrorTimeout);␊
167␉}␊
168␉␊
169␉setupFakeEfi();␊
170␉␊
171␉md0Ramdisk();␊
172␉␊
173␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
174␉␊
175␉// Cleanup the PXE base code.␊
176␉␊
177␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
178␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
179␉␉{␊
180␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
181␉␉␉sleep(2);␊
182␉␉}␊
183␉}␊
184␉␊
185␉bool dummyVal;␊
186␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊
187␉␉printf("Press any key to continue...");␊
188␉␉getc(); //Azi: getchar();␊
189␉}␊
190␉␊
191␉usb_loop();␊
192␉␊
193 if (checkOSVersion("10.7"))␊
194 {␊
195 execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
196 }␊
197 else␊
198 {␊
199 execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
200 }␊
201 ␊
202␉// If we were in text mode, switch to graphics mode.␊
203␉// This will draw the boot graphics unless we are in␊
204␉// verbose mode.␊
205␉␊
206␉if(gVerboseMode)␊
207␉ setVideoMode( GRAPHICS_MODE, 0 );␊
208␉else␊
209␉ drawBootGraphics();␊
210␉␊
211␉setupBooterLog();␊
212␉␊
213␉finalizeBootStruct();␊
214␉␊
215 if (checkOSVersion("10.7")) {␊
216␉␉␊
217␉␉// Masking out so that Lion doesn't doublefault␊
218␉␉outb(0x21, 0xff);␉/* Maskout all interrupts Pic1 */␊
219␉␉outb(0xa1, 0xff);␉/* Maskout all interrupts Pic2 */␊
220␉␉␊
221␉␉// Jump to kernel's entry point. There's no going back now.␊
222␉␉␊
223␉␉startprog( kernelEntry, bootArgs );␊
224␉}␊
225␉else {␊
226␉␉// Jump to kernel's entry point. There's no going back now.␊
227␉␉␊
228␉␉startprog( kernelEntry, bootArgsPreLion );␊
229␉}␊
230␉␊
231␉// Not reached␊
232␉return 0;␊
233}␊
234␊
235//==========================================================================␊
236// This is the entrypoint from real-mode which functions exactly as it did␊
237// before. Multiboot does its own runtime initialization, does some of its␊
238// own things, and then calls common_boot.␊
239void boot(int biosdev)␊
240{␊
241␉initialize_runtime();␊
242␉// Enable A20 gate before accessing memory above 1Mb.␊
243␉enableA20();␊
244␉common_boot(biosdev);␊
245}␊
246␊
247//==========================================================================␊
248// The 'main' function for the booter. Called by boot0 when booting␊
249// from a block device, or by the network booter.␊
250//␊
251// arguments:␊
252// biosdev - Value passed from boot1/NBP to specify the device␊
253// that the booter was loaded from.␊
254//␊
255// If biosdev is kBIOSDevNetwork, then this function will return if␊
256// booting was unsuccessful. This allows the PXE firmware to try the␊
257// next boot device on its list.␊
258void common_boot(int biosdev)␊
259{␊
260 int status;␊
261 char *bootFile;␊
262 unsigned long adler32;␊
263 bool quiet;␊
264 bool firstRun = true;␊
265 bool instantMenu;␊
266 bool rescanPrompt;␊
267 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
268 unsigned int denyBVFlags = kBVFlagEFISystem;␊
269␊
270 // Set reminder to unload the PXE base code. Neglect to unload␊
271 // the base code will result in a hang or kernel panic.␊
272 gUnloadPXEOnExit = true;␊
273␊
274 // Record the device that the booter was loaded from.␊
275 gBIOSDev = biosdev & kBIOSDevMask;␊
276␊
277 // Initialize boot info structure.␊
278 initKernBootStruct();␊
279␊
280␉initBooterLog();␊
281␊
282 // Setup VGA text mode.␊
283 // Not sure if it is safe to call setVideoMode() before the␊
284 // config table has been loaded. Call video_mode() instead.␊
285#if DEBUG␊
286 printf("before video_mode\n");␊
287#endif␊
288 video_mode( 2 ); // 80x25 mono text mode.␊
289#if DEBUG␊
290 printf("after video_mode\n");␊
291#endif␊
292␊
293 // Scan and record the system's hardware information.␊
294 scan_platform();␊
295␊
296 // First get info for boot volume.␊
297 scanBootVolumes(gBIOSDev, 0);␊
298 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
299 setBootGlobals(bvChain);␊
300 ␊
301 // Load boot.plist config file␊
302 status = loadSystemConfig(&bootInfo->bootConfig);␊
303␊
304 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
305 gBootMode |= kBootModeQuiet;␊
306 }␊
307␊
308 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
309 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
310 firstRun = false;␊
311 }␊
312␊
313 // Loading preboot ramdisk if exists.␊
314 loadPrebootRAMDisk();␊
315␊
316 // Disable rescan option by default␊
317 gEnableCDROMRescan = false;␊
318␊
319 // Enable it with Rescan=y in system config␊
320 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
321 gEnableCDROMRescan = true;␊
322 }␊
323␊
324 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
325 rescanPrompt = false;␊
326 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
327 gEnableCDROMRescan = promptForRescanOption();␊
328 }␊
329␊
330 // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
331 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
332 gScanSingleDrive = true;␊
333 }␊
334␊
335 // Create a list of partitions on device(s).␊
336 if (gScanSingleDrive) {␊
337 scanBootVolumes(gBIOSDev, &bvCount);␊
338 } else {␊
339 scanDisks(gBIOSDev, &bvCount);␊
340 }␊
341␊
342 // Create a separated bvr chain using the specified filters.␊
343 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
344␊
345 gBootVolume = selectBootVolume(bvChain);␊
346␊
347␉// Intialize module system ␊
348␉init_module_system();␊
349␉␊
350#if DEBUG␊
351 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
352 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
353 getc(); //Azi: getchar();␊
354#endif␊
355␊
356␉useGUI = true;␊
357␉// Override useGUI default␊
358␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊
359␉if (useGUI && initGUI())␊
360␉{␊
361␉␉// initGUI() returned with an error, disabling GUI.␊
362␉␉useGUI = false;␊
363␉}␊
364␊
365 setBootGlobals(bvChain);␊
366␊
367 // Parse args, load and start kernel.␊
368 while (1) {␊
369 const char *val;␊
370 int len;␊
371 int trycache;␊
372 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
373 int ret = -1;␊
374 void *binary = (void *)kLoadAddr;␊
375 bool tryresume;␊
376 bool tryresumedefault;␊
377 bool forceresume;␊
378␉␉bool usecache;␊
379␊
380 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
381 char bootFileSpec[512];␊
382␉␉␊
383 // Initialize globals.␊
384␊
385 sysConfigValid = false;␊
386 gErrors = false;␊
387␊
388 status = getBootOptions(firstRun);␊
389 firstRun = false;␊
390 if (status == -1) continue;␊
391␉␉ ␊
392 status = processBootOptions();␊
393 // Status==1 means to chainboot␊
394 if ( status == 1 ) break;␊
395 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
396 if ( status == -1 )␊
397 {␊
398 // gBootVolume == NULL usually means the user hit escape.␊
399 if(gBootVolume == NULL)␊
400 {␊
401 freeFilteredBVChain(bvChain);␊
402␊
403 if (gEnableCDROMRescan)␊
404 rescanBIOSDevice(gBIOSDev);␊
405 ␊
406 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
407 setBootGlobals(bvChain);␊
408 setupDeviceList(&bootInfo->themeConfig);␊
409 }␊
410 continue;␊
411 }␊
412␉␉␊
413 // Other status (e.g. 0) means that we should proceed with boot.␊
414␉␉␊
415␉␉// Turn off any GUI elements␊
416␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
417␉␉{␊
418␉␉␉gui.devicelist.draw = false;␊
419␉␉␉gui.bootprompt.draw = false;␊
420␉␉␉gui.menu.draw = false;␊
421␉␉␉gui.infobox.draw = false;␊
422␉␉␉gui.logo.draw = false;␊
423␉␉␉drawBackground();␊
424␉␉␉updateVRAM();␊
425␉␉}␊
426␉␉␊
427␉␉// Find out which version mac os we're booting.␊
428␉␉getOSVersion();␊
429␊
430␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
431␉␉␉archCpuType = CPU_TYPE_X86_64;␊
432␉␉} else {␊
433␉␉␉archCpuType = CPU_TYPE_I386;␊
434␉␉}␊
435␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
436␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
437␉␉␉␉archCpuType = CPU_TYPE_I386;␊
438␉␉␉}␊
439␉␉}␊
440␊
441␉␉// Notify moduals that we are attempting to boot␊
442␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
443␊
444␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
445␉␉␉tryresume = true;␊
446␉␉␉tryresumedefault = true;␊
447␉␉} else {␊
448␉␉␉tryresumedefault = false;␊
449␉␉}␊
450␊
451␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
452␉␉␉forceresume = false;␊
453␉␉}␊
454␉␉␊
455␉␉if (forceresume) {␊
456␉␉␉tryresume = true;␊
457␉␉␉tryresumedefault = false;␊
458␉␉}␊
459␉␉␊
460␉␉while (tryresume) {␊
461␉␉␉const char *tmp;␊
462␉␉␉BVRef bvr;␊
463␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
464␉␉␉␉val="/private/var/vm/sleepimage";␊
465␉␉␉␊
466␉␉␉// Do this first to be sure that root volume is mounted␊
467␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
468␊
469␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
470␉␉␉␉break;␊
471␉␉␉␊
472␉␉␉// Can't check if it was hibernation Wake=y is required␊
473␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
474␉␉␉␉break;␊
475␉␉␉␊
476␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
477␉␉␉␉break;␊
478␉␉␉␊
479␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
480␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
481␉␉␉␉break;␊
482␉␉␉}␊
483␉␉␉␉␊
484␉␉␉HibernateBoot((char *)val);␊
485␉␉␉break;␊
486␉␉}␊
487␉␉␊
488␉␉if(getBoolForKey(kUseKernelCache, &usecache, &bootInfo->bootConfig) && usecache) {␊
489␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
490␉␉␉␉strlcpy(gBootKernelCacheFile, val, len+1);␊
491␉␉␉}␊
492␉␉␉else {␊
493␉␉␉␉//Lion␊
494␉␉␉␉if (checkOSVersion("10.7")) {␊
495␉␉␉␉␉sprintf(gBootKernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
496␉␉␉␉}␊
497␉␉␉␉// Snow Leopard␊
498␉␉␉␉else if (checkOSVersion("10.6")) {␊
499␉␉␉␉␉sprintf(gBootKernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");␊
500␉␉␉␉␉int lnam = sizeof(gBootKernelCacheFile) + 9; //with adler32␊
501␉␉␉␉␉//Slice - TODO ???␊
502␉␉␉␉␉// e.g. kernelcache_i386.E102928C.qSs0 = "unsaved" cache file.␊
503␉␉␉␉␉//␊
504␉␉␉␉␉// See kext_tools-180.2.1/kextcache_main.c:␊
505␉␉␉␉␉// "Source directory has changed since starting; "␊
506␉ // "not saving cache file %s."␊
507␉␉␉␉␉// or␊
508␉␉␉␉␉// "Source kernel has changed since starting; "␊
509␉ // "not saving cache file %s."␊
510␉␉␉␉␉␊
511␉␉␉␉␉char* name;␊
512␉␉␉␉␉long prev_time = 0;␊
513␉␉␉␉␉␊
514␉␉␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
515␉␉␉␉␉␊
516␉␉␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
517␉␉␉␉␉{␊
518␉␉␉␉␉␉if(((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time && strstr(name, gBootKernelCacheFile) && (name[lnam] != '.'))␊
519␉␉␉␉␉␉{␊
520␉␉␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
521␉␉␉␉␉␉␉prev_time = time;␊
522␉␉␉␉␉␉}␊
523␉␉␉␉␉}␊
524␉␉␉␉}␊
525␉␉␉␉else {␊
526␉␉␉␉␉// Reset cache name.␊
527␉␉␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
528␉␉␉␉␉␊
529␉␉␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
530␉␉␉␉␉␊
531␉␉␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
532␉␉␉␉␉␊
533␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
534␉␉␉␉}␊
535␉␉␉}␊
536␉␉}␊
537␉␉␉␊
538 // Check for cache file.␊
539 trycache = (usecache && ␊
540␉␉␉␉␉((gBootMode & kBootModeSafe) == 0) &&␊
541 !gOverrideKernel &&␊
542 (gBootFileType == kBlockDeviceType) &&␊
543 (gMKextName[0] == '\0') &&␊
544 (gBootKernelCacheFile[0] != '\0'));␊
545␊
546␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
547␉␉␊
548 if (trycache) do {␊
549 ␊
550 // if we haven't found the kernel yet, don't use the cache␊
551 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
552 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
553 trycache = 0;␊
554 break;␊
555 }␊
556 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
557 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
558 || (cachetime < kerneltime)) {␊
559 trycache = 0;␊
560 break;␊
561 }␊
562 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
563 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
564 && (cachetime < exttime)) {␊
565 trycache = 0;␊
566 break;␊
567 }␊
568 if (kerneltime > exttime) {␊
569 exttime = kerneltime;␊
570 }␊
571 if (cachetime != (exttime + 1)) {␊
572 trycache = 0;␊
573 break;␊
574 }␊
575 } while (0);␊
576␊
577 do {␊
578 if (trycache) {␊
579 bootFile = gBootKernelCacheFile;␊
580 ␊
581␉␉␉␉verbose("Loading kernel cache %s\n", bootFile);␊
582␊
583 if (checkOSVersion("10.7")) {␊
584 ret = LoadThinFatFile(bootFile, &binary);␊
585␉␉␉␉}␊
586␉␉␉␉else {␊
587 ␉ret = LoadFile(bootFile);␊
588␉␉␉␉␉binary = (void *)kLoadAddr;␊
589␉␉␉␉}␊
590␉␉␉␉␊
591 if (ret >= 0)␊
592 break;␊
593␉␉␉␉␊
594␉␉␉␉verbose("Kernel cache did not loaded %s\n ", bootFile);␊
595 }␊
596␉␉␉␊
597 bootFile = bootInfo->bootFile;␊
598␊
599 // Try to load kernel image from alternate locations on boot helper partitions.␊
600 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
601 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
602 ␉ ␉ if (ret == -1)␊
603 ␉ ␉ {␊
604 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
605 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
606 if (ret == -1)␊
607 {␊
608 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
609 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
610 if (ret == -1)␊
611 {␊
612 // No alternate location found, using the original kernel image path.␊
613 strcpy(bootFileSpec, bootFile);␊
614 }␊
615 }␊
616 }␊
617 ␉␉␉␊
618 if (checkOSVersion("10.7"))␊
619 {␊
620 //Lion, dont load kernel if haz cache␊
621 if (!trycache) {␊
622 ␉␉verbose("Loading kernel %s\n", bootFileSpec);␊
623 ␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␊
624 ␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
625 ␉␉␉archCpuType = CPU_TYPE_I386;␊
626 ␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
627 ␉␉}␊
628␉␉ } ␊
629␉␉␉␉else ret = 1;␊
630 } ␊
631␉␉␉else {␊
632 //Snow Leopard or older␊
633 verbose("Loading kernel %s\n", bootFileSpec);␊
634 ret = LoadThinFatFile(bootFileSpec, &binary);␊
635 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
636 archCpuType = CPU_TYPE_I386;␊
637 ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
638 }␊
639 }␊
640 } while (0);␊
641␊
642 clearActivityIndicator();␊
643#if DEBUG␊
644 printf("Pausing...");␊
645 sleep(8);␊
646#endif␊
647␊
648 if (ret <= 0) {␊
649␉␉␉printf("Can't find %s\n", bootFile);␊
650␊
651␉␉␉sleep(1);␊
652␊
653 if (gBootFileType == kNetworkDeviceType) {␊
654 // Return control back to PXE. Don't unload PXE base code.␊
655 gUnloadPXEOnExit = false;␊
656 break;␊
657 }␊
658 } else {␊
659 /* Won't return if successful. */␊
660 ret = ExecKernel(binary);␊
661 }␊
662 }␊
663 ␊
664 // chainboot␊
665 if (status==1) {␊
666␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
667␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
668␉␉}␊
669 }␊
670␉␊
671 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
672␉␉nbpUnloadBaseCode();␊
673 }␊
674}␊
675␊
676/*!␊
677 Selects a new BIOS device, taking care to update the global state appropriately.␊
678 */␊
679/*␊
680static void selectBiosDevice(void)␊
681{␊
682 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
683 CacheReset();␊
684 diskFreeMap(oldMap);␊
685 oldMap = NULL;␊
686␊
687 int dev = selectAlternateBootDevice(gBIOSDev);␊
688␊
689 BVRef bvchain = scanBootVolumes(dev, 0);␊
690 BVRef bootVol = selectBootVolume(bvchain);␊
691 gBootVolume = bootVol;␊
692 setRootVolume(bootVol);␊
693 gBIOSDev = dev;␊
694}␊
695*/␊
696␊
697bool checkOSVersion(const char * version) ␊
698{␊
699␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1]) && (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
700}␊
701␊
702bool getOSVersion()␊
703{␊
704␉bool valid = false;␊
705␉config_file_t systemVersion;␊
706␉const char *val;␊
707␉int len;␊
708␉␊
709␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
710␉{␊
711␉␉valid = true;␊
712␉}␊
713␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
714␉{␊
715␉␉valid = true;␊
716␉}␊
717␉␊
718␉if (valid)␊
719␉{␊
720␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
721␉␉{␊
722␉␉␉// getValueForKey uses const char for val␊
723␉␉␉// so copy it and trim␊
724␉␉␉*gMacOSVersion = '\0';␊
725␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊
726␉␉}␊
727␉␉else␊
728␉␉␉valid = false;␊
729␉}␊
730␉␊
731␉return valid;␊
732}␊
733␊
734#define BASE 65521L /* largest prime smaller than 65536 */␊
735#define NMAX 5000␊
736// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
737␊
738#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
739#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
740#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
741#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
742#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
743␊
744unsigned long Adler32(unsigned char *buf, long len)␊
745{␊
746 unsigned long s1 = 1; // adler & 0xffff;␊
747 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
748 unsigned long result;␊
749 int k;␊
750␊
751 while (len > 0) {␊
752 k = len < NMAX ? len : NMAX;␊
753 len -= k;␊
754 while (k >= 16) {␊
755 DO16(buf);␊
756 buf += 16;␊
757 k -= 16;␊
758 }␊
759 if (k != 0) do {␊
760 s1 += *buf++;␊
761 s2 += s1;␊
762 } while (--k);␊
763 s1 %= BASE;␊
764 s2 %= BASE;␊
765 }␊
766 result = (s2 << 16) | s1;␊
767 return OSSwapHostToBigInt32(result);␊
768}␊
769

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