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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//==========================================================================␊
98// Zero the BSS.␊
99␊
100static void zeroBSS(void)␊
101{␊
102␉extern char _DATA__bss__begin, _DATA__bss__end;␊
103␉extern char _DATA__common__begin, _DATA__common__end;␊
104␊
105␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
106␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
107}␊
108␊
109//==========================================================================␊
110// Malloc error function␊
111␊
112static void malloc_error(char *addr, size_t size, const char *file, int line)␊
113{␊
114␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
115}␊
116␊
117//==========================================================================␊
118//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
119//␊
120void initialize_runtime(void)␊
121{␊
122␉zeroBSS();␊
123␉malloc_init(0, 0, 0, malloc_error);␊
124}␊
125␊
126//==========================================================================␊
127// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
128␊
129static int ExecKernel(void *binary)␊
130{␊
131␉entry_t␉␉␉␉␉ kernelEntry;␊
132␉int␉␉␉␉␉␉ ret;␊
133␉␊
134␉bootArgs->kaddr = bootArgs->ksize = 0;␊
135␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
136␉␊
137␉ret = DecodeKernel(binary,␊
138␉␉␉␉␉ &kernelEntry,␊
139␉␉␉␉␉ (char **) &bootArgs->kaddr,␊
140␉␉␉␉␉ (int *)&bootArgs->ksize );␊
141␉␊
142␉if ( ret != 0 )␊
143␉␉return ret;␊
144␉␊
145␉// Reserve space for boot args␊
146␉reserveKernBootStruct();␊
147␉␊
148␉// Notify modules that the kernel has been decoded␊
149␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊
150␉␊
151␉// Load boot drivers from the specifed root path.␊
152 //if (!gHaveKernelCache)␊
153 LoadDrivers("/");␊
154␉␊
155␉␊
156␉clearActivityIndicator();␊
157␉␊
158␉if (gErrors) {␊
159␉␉printf("Errors encountered while starting up the computer.\n");␊
160␉␉printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
161␉␉sleep(kBootErrorTimeout);␊
162␉}␊
163␉␊
164␉setupFakeEfi();␊
165␉␊
166␉md0Ramdisk();␊
167␉␊
168␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
169␉␊
170␉// Cleanup the PXE base code.␊
171␉␊
172␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
173␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
174␉␉{␊
175␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
176␉␉␉sleep(2);␊
177␉␉}␊
178␉}␊
179␉␊
180␉bool dummyVal;␊
181␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊
182␉␉printf("Press any key to continue...");␊
183␉␉getchar();␊
184␉}␊
185␉␊
186␉usb_loop();␊
187␉␊
188 if (checkOSVersion("10.7"))␊
189 {␊
190 execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
191 }␊
192 else␊
193 {␊
194 execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
195 }␊
196 ␊
197␉// If we were in text mode, switch to graphics mode.␊
198␉// This will draw the boot graphics unless we are in␊
199␉// verbose mode.␊
200␉␊
201␉if(gVerboseMode)␊
202␉ setVideoMode( GRAPHICS_MODE, 0 );␊
203␉else␊
204␉ drawBootGraphics();␊
205␉␊
206␉setupBooterLog();␊
207␉␊
208␉finalizeBootStruct();␊
209␉␊
210 if (checkOSVersion("10.7")) {␊
211␉␉␊
212␉␉// Masking out so that Lion doesn't doublefault␊
213␉␉outb(0x21, 0xff);␉/* Maskout all interrupts Pic1 */␊
214␉␉outb(0xa1, 0xff);␉/* Maskout all interrupts Pic2 */␊
215␉␉␊
216␉␉// Jump to kernel's entry point. There's no going back now.␊
217␉␉␊
218␉␉startprog( kernelEntry, bootArgs );␊
219␉}␊
220␉else {␊
221␉␉// Jump to kernel's entry point. There's no going back now.␊
222␉␉␊
223␉␉startprog( kernelEntry, bootArgsPreLion );␊
224␉}␊
225␉␊
226␉// Not reached␊
227␉return 0;␊
228}␊
229␊
230//==========================================================================␊
231// This is the entrypoint from real-mode which functions exactly as it did␊
232// before. Multiboot does its own runtime initialization, does some of its␊
233// own things, and then calls common_boot.␊
234void boot(int biosdev)␊
235{␊
236␉initialize_runtime();␊
237␉// Enable A20 gate before accessing memory above 1Mb.␊
238␉enableA20();␊
239␉common_boot(biosdev);␊
240}␊
241␊
242//==========================================================================␊
243// The 'main' function for the booter. Called by boot0 when booting␊
244// from a block device, or by the network booter.␊
245//␊
246// arguments:␊
247// biosdev - Value passed from boot1/NBP to specify the device␊
248// that the booter was loaded from.␊
249//␊
250// If biosdev is kBIOSDevNetwork, then this function will return if␊
251// booting was unsuccessful. This allows the PXE firmware to try the␊
252// next boot device on its list.␊
253void common_boot(int biosdev)␊
254{␊
255 int status;␊
256 char *bootFile;␊
257 unsigned long adler32;␊
258 bool quiet;␊
259 bool firstRun = true;␊
260 bool instantMenu;␊
261 bool rescanPrompt;␊
262 unsigned int allowBVFlags = kBVFlagSystemVolume | kBVFlagForeignBoot;␊
263 unsigned int denyBVFlags = kBVFlagEFISystem;␊
264␊
265 // Set reminder to unload the PXE base code. Neglect to unload␊
266 // the base code will result in a hang or kernel panic.␊
267 gUnloadPXEOnExit = true;␊
268␊
269 // Record the device that the booter was loaded from.␊
270 gBIOSDev = biosdev & kBIOSDevMask;␊
271␊
272 // Initialize boot info structure.␊
273 initKernBootStruct();␊
274␊
275␉initBooterLog();␊
276␊
277 // Setup VGA text mode.␊
278 // Not sure if it is safe to call setVideoMode() before the␊
279 // config table has been loaded. Call video_mode() instead.␊
280#if DEBUG␊
281 printf("before video_mode\n");␊
282#endif␊
283 video_mode( 2 ); // 80x25 mono text mode.␊
284#if DEBUG␊
285 printf("after video_mode\n");␊
286#endif␊
287␊
288 // Scan and record the system's hardware information.␊
289 scan_platform();␊
290␊
291 // First get info for boot volume.␊
292 scanBootVolumes(gBIOSDev, 0);␊
293 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
294 setBootGlobals(bvChain);␊
295 ␊
296 // Load boot.plist config file␊
297 status = loadChameleonConfig(&bootInfo->overrideConfig);␊
298␊
299 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
300 gBootMode |= kBootModeQuiet;␊
301 }␊
302␊
303 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
304 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
305 firstRun = false;␊
306 }␊
307␊
308 // Loading preboot ramdisk if exists.␊
309 loadPrebootRAMDisk();␊
310␊
311 // Disable rescan option by default␊
312 gEnableCDROMRescan = false;␊
313␊
314 // Enable it with Rescan=y in system config␊
315 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
316 gEnableCDROMRescan = true;␊
317 }␊
318␊
319 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
320 rescanPrompt = false;␊
321 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
322 gEnableCDROMRescan = promptForRescanOption();␊
323 }␊
324␊
325 // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
326 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
327 gScanSingleDrive = true;␊
328 }␊
329␊
330 // Create a list of partitions on device(s).␊
331 if (gScanSingleDrive) {␊
332 scanBootVolumes(gBIOSDev, &bvCount);␊
333 } else {␊
334 scanDisks(gBIOSDev, &bvCount);␊
335 }␊
336␊
337 // Create a separated bvr chain using the specified filters.␊
338 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
339␊
340 gBootVolume = selectBootVolume(bvChain);␊
341␊
342␉// Intialize module system ␊
343␉init_module_system();␊
344␉␊
345#if DEBUG␊
346 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
347 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
348 getchar();␊
349#endif␊
350␊
351␉useGUI = true;␊
352␉// Override useGUI default␊
353␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊
354␉if (useGUI && initGUI())␊
355␉{␊
356␉␉// initGUI() returned with an error, disabling GUI.␊
357␉␉useGUI = false;␊
358␉}␊
359␊
360 setBootGlobals(bvChain);␊
361␊
362 // Parse args, load and start kernel.␊
363 while (1) {␊
364 const char *val;␊
365 int len;␊
366 int trycache;␊
367 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
368 int ret = -1;␊
369 void *binary = (void *)kLoadAddr;␊
370 bool tryresume;␊
371 bool tryresumedefault;␊
372 bool forceresume;␊
373␉␉bool usecache = false; //true;␊
374␊
375 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
376 char bootFileSpec[512];␊
377␉␉␊
378 // Initialize globals.␊
379␊
380 sysConfigValid = false;␊
381 gErrors = false;␊
382␊
383 status = getBootOptions(firstRun);␊
384 firstRun = false;␊
385 if (status == -1) continue;␊
386␉␉ ␊
387 status = processBootOptions();␊
388 // Status==1 means to chainboot␊
389 if ( status == 1 ) break;␊
390 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
391 if ( status == -1 )␊
392 {␊
393 // gBootVolume == NULL usually means the user hit escape.␊
394 if(gBootVolume == NULL)␊
395 {␊
396 freeFilteredBVChain(bvChain);␊
397␊
398 if (gEnableCDROMRescan)␊
399 rescanBIOSDevice(gBIOSDev);␊
400 ␊
401 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
402 setBootGlobals(bvChain);␊
403 setupDeviceList(&bootInfo->themeConfig);␊
404 }␊
405 continue;␊
406 }␊
407␉␉␊
408 // Other status (e.g. 0) means that we should proceed with boot.␊
409␉␉␊
410␉␉// Turn off any GUI elements␊
411␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
412␉␉{␊
413␉␉␉gui.devicelist.draw = false;␊
414␉␉␉gui.bootprompt.draw = false;␊
415␉␉␉gui.menu.draw = false;␊
416␉␉␉gui.infobox.draw = false;␊
417␉␉␉gui.logo.draw = false;␊
418␉␉␉drawBackground();␊
419␉␉␉updateVRAM();␊
420␉␉}␊
421␉␉␊
422␉␉// Find out which version mac os we're booting.␊
423␉␉getOSVersion();␊
424␊
425␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
426␉␉␉archCpuType = CPU_TYPE_X86_64;␊
427␉␉} else {␊
428␉␉␉archCpuType = CPU_TYPE_I386;␊
429␉␉}␊
430␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
431␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
432␉␉␉␉archCpuType = CPU_TYPE_I386;␊
433␉␉␉}␊
434␉␉}␊
435 //archCpuType = CPU_TYPE_I386;␊
436 ␊
437␉␉// Notify moduals that we are attempting to boot␊
438␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
439␊
440␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
441␉␉␉tryresume = true;␊
442␉␉␉tryresumedefault = true;␊
443␉␉} else {␊
444␉␉␉tryresumedefault = false;␊
445␉␉}␊
446␊
447␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
448␉␉␉forceresume = false;␊
449␉␉}␊
450␉␉␊
451␉␉if (forceresume) {␊
452␉␉␉tryresume = true;␊
453␉␉␉tryresumedefault = false;␊
454␉␉}␊
455␉␉␊
456␉␉while (tryresume) {␊
457␉␉␉const char *tmp;␊
458␉␉␉BVRef bvr;␊
459␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
460␉␉␉␉val="/private/var/vm/sleepimage";␊
461␉␉␉␊
462␉␉␉// Do this first to be sure that root volume is mounted␊
463␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
464␊
465␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
466␉␉␉␉break;␊
467␉␉␉␊
468␉␉␉// Can't check if it was hibernation Wake=y is required␊
469␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
470␉␉␉␉break;␊
471␉␉␉␊
472␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
473␉␉␉␉break;␊
474␉␉␉␊
475␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
476␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
477␉␉␉␉break;␊
478␉␉␉}␊
479␉␉␉␉␊
480␉␉␉HibernateBoot((char *)val);␊
481␉␉␉break;␊
482␉␉}␊
483 ␊
484␉␉getBoolForKey(kUseKernelCache, &usecache, &bootInfo->bootConfig);␊
485␉␉if(usecache) {␊
486␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
487 if(val[0] == '\\')␊
488 {␊
489 len--;␊
490 val++;␊
491 }␊
492 strlcpy(gBootKernelCacheFile, val, len+1);␊
493␉␉␉}␊
494␉␉␉else {␊
495␉␉␉␉//Lion␊
496␉␉␉␉if (checkOSVersion("10.7")) {␊
497␉␉␉␉␉sprintf(gBootKernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
498␉␉␉␉}␊
499␉␉␉␉// Snow Leopard␊
500␉␉␉␉else if (checkOSVersion("10.6")) {␊
501␉␉␉␉␉sprintf(gBootKernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");␊
502␉␉␉␉␉int lnam = sizeof(gBootKernelCacheFile) + 9; //with adler32␊
503␉␉␉␉␉//Slice - TODO ???␊
504␉␉␉␉␉// e.g. kernelcache_i386.E102928C.qSs0 = "unsaved" cache file.␊
505␉␉␉␉␉//␊
506␉␉␉␉␉// See kext_tools-180.2.1/kextcache_main.c:␊
507␉␉␉␉␉// "Source directory has changed since starting; "␊
508␉ // "not saving cache file %s."␊
509␉␉␉␉␉// or␊
510␉␉␉␉␉// "Source kernel has changed since starting; "␊
511␉ // "not saving cache file %s."␊
512␉␉␉␉␉␊
513␉␉␉␉␉char* name;␊
514␉␉␉␉␉long prev_time = 0;␊
515␉␉␉␉␉␊
516␉␉␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
517␉␉␉␉␉␊
518␉␉␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
519␉␉␉␉␉{␊
520␉␉␉␉␉␉if(((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time && strstr(name, gBootKernelCacheFile) && (name[lnam] != '.'))␊
521␉␉␉␉␉␉{␊
522␉␉␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
523␉␉␉␉␉␉␉prev_time = time;␊
524␉␉␉␉␉␉}␊
525␉␉␉␉␉}␊
526␉␉␉␉}␊
527␉␉␉␉else {␊
528␉␉␉␉␉// Reset cache name.␊
529␉␉␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
530␉␉␉␉␉␊
531␉␉␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
532␉␉␉␉␉␊
533␉␉␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
534␉␉␉␉␉␊
535␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
536␉␉␉␉}␊
537␉␉␉}␊
538␉␉}␊
539␉␉␉␊
540 // Check for cache file.␊
541 trycache = (usecache && ␊
542␉␉␉␉␉((gBootMode & kBootModeSafe) == 0) &&␊
543 !gOverrideKernel &&␊
544 (gBootFileType == kBlockDeviceType) &&␊
545 (gMKextName[0] == '\0') &&␊
546 (gBootKernelCacheFile[0] != '\0'));␊
547␊
548␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
549␉␉␊
550 if (trycache) do {␊
551 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
552 if(ret != 0) kerneltime = 0;␊
553 else if ((flags & kFileTypeMask) != kFileTypeFlat) {␊
554 trycache = 0;␊
555 break;␊
556 }␊
557␊
558 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
559 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
560 || (cachetime < kerneltime)) {␊
561 trycache = 0;␊
562 break;␊
563 }␊
564 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
565 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
566 && (cachetime < exttime)) {␊
567 trycache = 0;␊
568 break;␊
569 }␊
570 if (ret == 0 && kerneltime > exttime) {␊
571 exttime = kerneltime;␊
572 }␊
573 if (ret == 0 && cachetime != (exttime + 1)) {␊
574 trycache = 0;␊
575 break;␊
576 }␊
577 } while (0);␊
578␊
579 do {␊
580 if (trycache) {␊
581 bootFile = gBootKernelCacheFile;␊
582 ␊
583␉␉␉␉verbose("Loading kernel cache %s\n", bootFile);␊
584␊
585 if (checkOSVersion("10.7")) {␊
586 ret = LoadThinFatFile(bootFile, &binary);␊
587␉␉␉␉}␊
588␉␉␉␉else {␊
589 ␉ret = LoadFile(bootFile);␊
590␉␉␉␉␉binary = (void *)kLoadAddr;␊
591␉␉␉␉}␊
592␉␉␉␉␊
593 if (ret >= 0)␊
594 break;␊
595␉␉␉␉␊
596␉␉␉␉verbose("Kernel cache did not load %s\n ", bootFile);␊
597 }␊
598␉␉␉␊
599 bootFile = bootInfo->bootFile;␊
600␊
601 // Try to load kernel image from alternate locations on boot helper partitions.␊
602 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
603 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
604 ␉ ␉ if (ret == -1)␊
605 ␉ ␉ {␊
606 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
607 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
608 if (ret == -1)␊
609 {␊
610 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
611 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
612 if (ret == -1)␊
613 {␊
614 // No alternate location found, using the original kernel image path.␊
615 strcpy(bootFileSpec, bootFile);␊
616 }␊
617 }␊
618 }␊
619 ␉␉␉␊
620 if (checkOSVersion("10.7"))␊
621 {␊
622 //Lion, dont load kernel if haz cache␊
623 if (!trycache) {␊
624 ␉␉verbose("Loading kernel %s\n", bootFileSpec);␊
625 ␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␊
626 ␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
627 ␉␉␉archCpuType = CPU_TYPE_I386;␊
628 ␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
629 ␉␉}␊
630␉␉ } ␊
631␉␉␉␉else ret = 1;␊
632 } ␊
633␉␉␉else {␊
634 //Snow Leopard or older␊
635 verbose("Loading kernel %s\n", bootFileSpec);␊
636 ret = LoadThinFatFile(bootFileSpec, &binary);␊
637 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
638 archCpuType = CPU_TYPE_I386;␊
639 ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
640 }␊
641 }␊
642 } while (0);␊
643␊
644 clearActivityIndicator();␊
645#if DEBUG␊
646 printf("Pausing...");␊
647 sleep(8);␊
648#endif␊
649␊
650 if (ret <= 0) {␊
651␉␉␉printf("Can't find %s\n", bootFile);␊
652␊
653␉␉␉sleep(1);␊
654␊
655 if (gBootFileType == kNetworkDeviceType) {␊
656 // Return control back to PXE. Don't unload PXE base code.␊
657 gUnloadPXEOnExit = false;␊
658 break;␊
659 }␊
660 } else {␊
661 /* Won't return if successful. */␊
662 ret = ExecKernel(binary);␊
663 }␊
664 }␊
665 ␊
666 // chainboot␊
667 if (status==1) {␊
668␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
669␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
670␉␉}␊
671 }␊
672␉␊
673 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
674␉␉nbpUnloadBaseCode();␊
675 }␊
676}␊
677␊
678/*!␊
679 Selects a new BIOS device, taking care to update the global state appropriately.␊
680 */␊
681/*␊
682static void selectBiosDevice(void)␊
683{␊
684 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
685 CacheReset();␊
686 diskFreeMap(oldMap);␊
687 oldMap = NULL;␊
688␊
689 int dev = selectAlternateBootDevice(gBIOSDev);␊
690␊
691 BVRef bvchain = scanBootVolumes(dev, 0);␊
692 BVRef bootVol = selectBootVolume(bvchain);␊
693 gBootVolume = bootVol;␊
694 setRootVolume(bootVol);␊
695 gBIOSDev = dev;␊
696}␊
697*/␊
698␊
699bool checkOSVersion(const char * version) ␊
700{␊
701␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1]) && (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
702}␊
703␊
704bool getOSVersion()␊
705{␊
706␉bool valid = false;␊
707␉config_file_t systemVersion;␊
708␉const char *val;␊
709␉int len;␊
710␉␊
711␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
712␉{␊
713␉␉valid = true;␊
714␉}␊
715␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
716␉{␊
717␉␉valid = true;␊
718␉}␊
719␉␊
720␉if (valid)␊
721␉{␊
722␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
723␉␉{␊
724␉␉␉// getValueForKey uses const char for val␊
725␉␉␉// so copy it and trim␊
726␉␉␉*gMacOSVersion = '\0';␊
727␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊
728␉␉}␊
729␉␉else␊
730␉␉␉valid = false;␊
731␉}␊
732␉␊
733␉return valid;␊
734}␊
735␊
736#define BASE 65521L /* largest prime smaller than 65536 */␊
737#define NMAX 5000␊
738// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
739␊
740#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
741#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
742#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
743#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
744#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
745␊
746unsigned long Adler32(unsigned char *buf, long len)␊
747{␊
748 unsigned long s1 = 1; // adler & 0xffff;␊
749 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
750 unsigned long result;␊
751 int k;␊
752␊
753 while (len > 0) {␊
754 k = len < NMAX ? len : NMAX;␊
755 len -= k;␊
756 while (k >= 16) {␊
757 DO16(buf);␊
758 buf += 16;␊
759 k -= 16;␊
760 }␊
761 if (k != 0) do {␊
762 s1 += *buf++;␊
763 s2 += s1;␊
764 } while (--k);␊
765 s1 %= BASE;␊
766 s2 %= BASE;␊
767 }␊
768 result = (s2 << 16) | s1;␊
769 return OSSwapHostToBigInt32(result);␊
770}␊
771

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