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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 setupFakeEfi();␊
152␊
153␉// Load boot drivers from the specifed root path.␊
154 //if (!gHaveKernelCache)␊
155 LoadDrivers("/");␊
156␉␊
157 execute_hook("DriversLoaded", (void*)binary, NULL, NULL, NULL);␊
158␊
159␉clearActivityIndicator();␊
160␉␊
161␉if (gErrors) {␊
162␉␉printf("Errors encountered while starting up the computer.\n");␊
163␉␉printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
164␉␉sleep(kBootErrorTimeout);␊
165␉}␊
166␉␉␊
167␉md0Ramdisk();␊
168␉␊
169␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
170␉␊
171␉// Cleanup the PXE base code.␊
172␉␊
173␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
174␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
175␉␉{␊
176␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
177␉␉␉sleep(2);␊
178␉␉}␊
179␉}␊
180␉␊
181␉bool dummyVal;␊
182␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->chameleonConfig) && dummyVal) {␊
183␉␉printf("(Wait) ");␊
184␉␉pause();␊
185␉}␊
186␉␊
187␉usb_loop();␊
188␉␊
189 if (checkOSVersion("10.7"))␊
190 {␊
191 execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
192 }␊
193 else␊
194 {␊
195 execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
196 }␊
197 ␊
198␉// If we were in text mode, switch to graphics mode.␊
199␉// This will draw the boot graphics unless we are in␊
200␉// verbose mode.␊
201␉␊
202␉if(gVerboseMode)␊
203␉ setVideoMode( GRAPHICS_MODE, 0 );␊
204␉else␊
205␉ drawBootGraphics();␊
206␉␊
207␉setupBooterLog();␊
208␉␊
209␉finalizeBootStruct();␊
210␉␊
211 if (checkOSVersion("10.7")) {␊
212␉␉␊
213␉␉// Masking out so that Lion doesn't doublefault␊
214␉␉outb(0x21, 0xff);␉/* Maskout all interrupts Pic1 */␊
215␉␉outb(0xa1, 0xff);␉/* Maskout all interrupts Pic2 */␊
216␉␉␊
217␉␉// Jump to kernel's entry point. There's no going back now.␊
218␉␉␊
219␉␉startprog( kernelEntry, bootArgs );␊
220␉}␊
221␉else {␊
222␉␉// Jump to kernel's entry point. There's no going back now.␊
223␉␉␊
224␉␉startprog( kernelEntry, bootArgsPreLion );␊
225␉}␊
226␉␊
227␉// Not reached␊
228␉return 0;␊
229}␊
230␊
231//==========================================================================␊
232// This is the entrypoint from real-mode which functions exactly as it did␊
233// before. Multiboot does its own runtime initialization, does some of its␊
234// own things, and then calls common_boot.␊
235void boot(int biosdev)␊
236{␊
237␉initialize_runtime();␊
238␉// Enable A20 gate before accessing memory above 1Mb.␊
239␉enableA20();␊
240␉common_boot(biosdev);␊
241}␊
242␊
243//==========================================================================␊
244// The 'main' function for the booter. Called by boot0 when booting␊
245// from a block device, or by the network booter.␊
246//␊
247// arguments:␊
248// biosdev - Value passed from boot1/NBP to specify the device␊
249// that the booter was loaded from.␊
250//␊
251// If biosdev is kBIOSDevNetwork, then this function will return if␊
252// booting was unsuccessful. This allows the PXE firmware to try the␊
253// next boot device on its list.␊
254void common_boot(int biosdev)␊
255{␊
256 int status;␊
257 char *bootFile;␊
258 unsigned long adler32;␊
259 bool quiet;␊
260 bool firstRun = true;␊
261 bool instantMenu;␊
262 bool rescanPrompt;␊
263 unsigned int allowBVFlags = kBVFlagSystemVolume | kBVFlagForeignBoot;␊
264 unsigned int denyBVFlags = kBVFlagEFISystem;␊
265␊
266 // Set reminder to unload the PXE base code. Neglect to unload␊
267 // the base code will result in a hang or kernel panic.␊
268 gUnloadPXEOnExit = true;␊
269␊
270 // Record the device that the booter was loaded from.␊
271 gBIOSDev = biosdev & kBIOSDevMask;␊
272␊
273 // Initialize boot info structure.␊
274 initKernBootStruct();␊
275␊
276␉initBooterLog();␊
277␊
278 // Setup VGA text mode.␊
279 // Not sure if it is safe to call setVideoMode() before the␊
280 // config table has been loaded. Call video_mode() instead.␊
281#if DEBUG␊
282 printf("before video_mode\n");␊
283#endif␊
284 video_mode( 2 ); // 80x25 mono text mode.␊
285#if DEBUG␊
286 printf("after video_mode\n");␊
287#endif␊
288␊
289 // Scan and record the system's hardware information.␊
290 scan_platform();␊
291␊
292 // First get info for boot volume.␊
293 scanBootVolumes(gBIOSDev, 0);␊
294 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
295 setBootGlobals(bvChain);␊
296 ␊
297 // Load boot.plist config file␊
298 status = loadChameleonConfig(&bootInfo->chameleonConfig);␊
299␊
300 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->chameleonConfig) && quiet) {␊
301 gBootMode |= kBootModeQuiet;␊
302 }␊
303␊
304 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
305 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->chameleonConfig) && instantMenu) {␊
306 firstRun = false;␊
307 }␊
308␊
309 // Loading preboot ramdisk if exists.␊
310 loadPrebootRAMDisk();␊
311␊
312 // Disable rescan option by default␊
313 gEnableCDROMRescan = false;␊
314␊
315 // Enable it with Rescan=y in system config␊
316 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->chameleonConfig) && gEnableCDROMRescan) {␊
317 gEnableCDROMRescan = true;␊
318 }␊
319␊
320 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
321 rescanPrompt = false;␊
322 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->chameleonConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
323 gEnableCDROMRescan = promptForRescanOption();␊
324 }␊
325␊
326 // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
327 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->chameleonConfig) && gScanSingleDrive) {␊
328 gScanSingleDrive = true;␊
329 }␊
330␊
331 // Create a list of partitions on device(s).␊
332 if (gScanSingleDrive) {␊
333 scanBootVolumes(gBIOSDev, &bvCount);␊
334 } else {␊
335 scanDisks(gBIOSDev, &bvCount);␊
336 }␊
337␊
338 // Create a separated bvr chain using the specified filters.␊
339 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
340␊
341 gBootVolume = selectBootVolume(bvChain);␊
342␊
343␉// Intialize module system ␊
344␉init_module_system();␊
345␉␊
346#if DEBUG␊
347 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
348 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
349 getchar();␊
350#endif␊
351␊
352␉useGUI = true;␊
353␉// Override useGUI default␊
354␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->chameleonConfig);␊
355␉if (useGUI && initGUI())␊
356␉{␊
357␉␉// initGUI() returned with an error, disabling GUI.␊
358␉␉useGUI = false;␊
359␉}␊
360␊
361 setBootGlobals(bvChain);␊
362␊
363 // Parse args, load and start kernel.␊
364 while (1) {␊
365 const char *val;␊
366 int len;␊
367 int trycache;␊
368 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
369 int ret = -1;␊
370 void *binary = (void *)kLoadAddr;␊
371 bool tryresume;␊
372 bool tryresumedefault;␊
373 bool forceresume;␊
374␉␉bool usecache = false;//true;␊
375␊
376 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
377 char bootFileSpec[512];␊
378␉␉␊
379 // Initialize globals.␊
380␊
381 sysConfigValid = false;␊
382 gErrors = false;␊
383␊
384 status = getBootOptions(firstRun);␊
385 firstRun = false;␊
386 if (status == -1) continue;␊
387␉␉ ␊
388 status = processBootOptions();␊
389 // Status==1 means to chainboot␊
390 if ( status == 1 ) break;␊
391 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
392 if ( status == -1 )␊
393 {␊
394 // gBootVolume == NULL usually means the user hit escape.␊
395 if(gBootVolume == NULL)␊
396 {␊
397 freeFilteredBVChain(bvChain);␊
398␊
399 if (gEnableCDROMRescan)␊
400 rescanBIOSDevice(gBIOSDev);␊
401 ␊
402 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
403 setBootGlobals(bvChain);␊
404 setupDeviceList(&bootInfo->themeConfig);␊
405 }␊
406 continue;␊
407 }␊
408␉␉␊
409 // Other status (e.g. 0) means that we should proceed with boot.␊
410␉␉␊
411␉␉// Turn off any GUI elements␊
412␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
413␉␉{␊
414␉␉␉gui.devicelist.draw = false;␊
415␉␉␉gui.bootprompt.draw = false;␊
416␉␉␉gui.menu.draw = false;␊
417␉␉␉gui.infobox.draw = false;␊
418␉␉␉gui.logo.draw = false;␊
419␉␉␉drawBackground();␊
420␉␉␉updateVRAM();␊
421␉␉}␊
422␉␉␊
423␉␉// Find out which version mac os we're booting.␊
424␉␉getOSVersion();␊
425␊
426␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
427␉␉␉archCpuType = CPU_TYPE_X86_64;␊
428␉␉} else {␊
429␉␉␉archCpuType = CPU_TYPE_I386;␊
430␉␉}␊
431␉␉if (getValueForKey(karch, &val, &len, &bootInfo->chameleonConfig)) {␊
432␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
433␉␉␉␉archCpuType = CPU_TYPE_I386;␊
434␉␉␉}␊
435␉␉}␊
436 ␊
437 if (getValueForKey(kKernelArchKey, &val, &len, &bootInfo->chameleonConfig)) {␊
438␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
439␉␉␉␉archCpuType = CPU_TYPE_I386;␊
440␉␉␉}␊
441␉␉}␊
442␊
443 //archCpuType = CPU_TYPE_I386;␊
444 ␊
445␉␉// Notify moduals that we are attempting to boot␊
446␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
447␊
448␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->chameleonConfig)) {␊
449␉␉␉tryresume = true;␊
450␉␉␉tryresumedefault = true;␊
451␉␉} else {␊
452␉␉␉tryresumedefault = false;␊
453␉␉}␊
454␊
455␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->chameleonConfig)) {␊
456␉␉␉forceresume = false;␊
457␉␉}␊
458␉␉␊
459␉␉if (forceresume) {␊
460␉␉␉tryresume = true;␊
461␉␉␉tryresumedefault = false;␊
462␉␉}␊
463␉␉␊
464␉␉while (tryresume) {␊
465␉␉␉const char *tmp;␊
466␉␉␉BVRef bvr;␊
467␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->chameleonConfig))␊
468␉␉␉␉val="/private/var/vm/sleepimage";␊
469␉␉␉␊
470␉␉␉// Do this first to be sure that root volume is mounted␊
471␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
472␊
473␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
474␉␉␉␉break;␊
475␉␉␉␊
476␉␉␉// Can't check if it was hibernation Wake=y is required␊
477␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
478␉␉␉␉break;␊
479␉␉␉␊
480␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
481␉␉␉␉break;␊
482␉␉␉␊
483␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
484␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
485␉␉␉␉break;␊
486␉␉␉}␊
487␉␉␉␉␊
488␉␉␉HibernateBoot((char *)val);␊
489␉␉␉break;␊
490␉␉}␊
491 ␊
492␉␉getBoolForKey(kUseKernelCache, &usecache, &bootInfo->chameleonConfig);␊
493␉␉if(usecache) {␊
494␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
495 if(val[0] == '\\')␊
496 {␊
497 len--;␊
498 val++;␊
499 }␊
500 strlcpy(gBootKernelCacheFile, val, len+1);␊
501␉␉␉}␊
502␉␉␉else {␊
503␉␉␉␉//Lion␊
504␉␉␉␉if (checkOSVersion("10.7")) {␊
505␉␉␉␉␉sprintf(gBootKernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
506␉␉␉␉}␊
507␉␉␉␉// Snow Leopard␊
508␉␉␉␉else if (checkOSVersion("10.6")) {␊
509␉␉␉␉␉sprintf(gBootKernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");␊
510␉␉␉␉␉int lnam = sizeof(gBootKernelCacheFile) + 9; //with adler32␊
511␉␉␉␉␉//Slice - TODO ???␊
512␉␉␉␉␉// e.g. kernelcache_i386.E102928C.qSs0 = "unsaved" cache file.␊
513␉␉␉␉␉//␊
514␉␉␉␉␉// See kext_tools-180.2.1/kextcache_main.c:␊
515␉␉␉␉␉// "Source directory has changed since starting; "␊
516␉ // "not saving cache file %s."␊
517␉␉␉␉␉// or␊
518␉␉␉␉␉// "Source kernel has changed since starting; "␊
519␉ // "not saving cache file %s."␊
520␉␉␉␉␉␊
521␉␉␉␉␉char* name;␊
522␉␉␉␉␉long prev_time = 0;␊
523␉␉␉␉␉␊
524␉␉␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
525␉␉␉␉␉␊
526␉␉␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
527␉␉␉␉␉{␊
528␉␉␉␉␉␉if(((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time && strstr(name, gBootKernelCacheFile) && (name[lnam] != '.'))␊
529␉␉␉␉␉␉{␊
530␉␉␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
531␉␉␉␉␉␉␉prev_time = time;␊
532␉␉␉␉␉␉}␊
533␉␉␉␉␉}␊
534␉␉␉␉}␊
535␉␉␉␉else {␊
536␉␉␉␉␉// Reset cache name.␊
537␉␉␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
538␉␉␉␉␉␊
539␉␉␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->chameleonConfig);␊
540␉␉␉␉␉␊
541␉␉␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
542␉␉␉␉␉␊
543␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
544␉␉␉␉}␊
545␉␉␉}␊
546␉␉}␊
547␉␉␉␊
548 // Check for cache file.␊
549 trycache = (usecache && ␊
550␉␉␉␉␉((gBootMode & kBootModeSafe) == 0) &&␊
551 !gOverrideKernel &&␊
552 (gBootFileType == kBlockDeviceType) &&␊
553 (gMKextName[0] == '\0') &&␊
554 (gBootKernelCacheFile[0] != '\0'));␊
555␊
556␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
557␉␉␊
558 if (trycache) do {␊
559 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
560 if(ret != 0) kerneltime = 0;␊
561 else if ((flags & kFileTypeMask) != kFileTypeFlat) {␊
562 trycache = 0;␊
563 break;␊
564 }␊
565␊
566 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
567 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
568 || (cachetime < kerneltime)) {␊
569 trycache = 0;␊
570 break;␊
571 }␊
572 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
573 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
574 && (cachetime < exttime)) {␊
575 trycache = 0;␊
576 break;␊
577 }␊
578 if (ret == 0 && kerneltime > exttime) {␊
579 exttime = kerneltime;␊
580 }␊
581 if (ret == 0 && cachetime != (exttime + 1)) {␊
582 trycache = 0;␊
583 break;␊
584 }␊
585 } while (0);␊
586␊
587 do {␊
588 if (trycache) {␊
589 bootFile = gBootKernelCacheFile;␊
590 ␊
591␉␉␉␉verbose("Loading kernel cache %s\n", bootFile);␊
592␊
593 if (checkOSVersion("10.7")) {␊
594 ret = LoadThinFatFile(bootFile, &binary);␊
595␉␉␉␉}␊
596␉␉␉␉else {␊
597 ␉ret = LoadFile(bootFile);␊
598␉␉␉␉␉binary = (void *)kLoadAddr;␊
599␉␉␉␉}␊
600␉␉␉␉␊
601 if (ret >= 0)␊
602 break;␊
603␉␉␉␉␊
604␉␉␉␉verbose("Kernel cache did not load %s\n ", bootFile);␊
605 }␊
606␉␉␉␊
607 bootFile = bootInfo->bootFile;␊
608␊
609 // Try to load kernel image from alternate locations on boot helper partitions.␊
610 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
611 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
612 ␉ ␉ if (ret == -1)␊
613 ␉ ␉ {␊
614 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
615 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
616 if (ret == -1)␊
617 {␊
618 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
619 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
620 if (ret == -1)␊
621 {␊
622 // No alternate location found, using the original kernel image path.␊
623 strcpy(bootFileSpec, bootFile);␊
624 }␊
625 }␊
626 }␊
627 ␉␉␉␊
628 if (checkOSVersion("10.7"))␊
629 {␊
630 //Lion, dont load kernel if haz cache␊
631 if (!trycache) {␊
632 ␉␉verbose("Loading kernel %s\n", bootFileSpec);␊
633 ␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␊
634 ␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
635 ␉␉␉archCpuType = CPU_TYPE_I386;␊
636 ␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
637 ␉␉}␊
638␉␉ } ␊
639␉␉␉␉else ret = 1;␊
640 } ␊
641␉␉␉else {␊
642 //Snow Leopard or older␊
643 verbose("Loading kernel %s\n", bootFileSpec);␊
644 ret = LoadThinFatFile(bootFileSpec, &binary);␊
645 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
646 archCpuType = CPU_TYPE_I386;␊
647 ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
648 }␊
649 }␊
650 } while (0);␊
651␊
652 clearActivityIndicator();␊
653#if DEBUG␊
654 printf("Pausing...");␊
655 sleep(8);␊
656#endif␊
657␊
658 if (ret <= 0) {␊
659␉␉␉printf("Can't find %s\n", bootFile);␊
660␊
661␉␉␉sleep(1);␊
662␊
663 if (gBootFileType == kNetworkDeviceType) {␊
664 // Return control back to PXE. Don't unload PXE base code.␊
665 gUnloadPXEOnExit = false;␊
666 break;␊
667 }␊
668 } else {␊
669 /* Won't return if successful. */␊
670 ret = ExecKernel(binary);␊
671 }␊
672 }␊
673 ␊
674 // chainboot␊
675 if (status==1) {␊
676␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
677␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
678␉␉}␊
679 }␊
680␉␊
681 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
682␉␉nbpUnloadBaseCode();␊
683 }␊
684}␊
685␊
686/*!␊
687 Selects a new BIOS device, taking care to update the global state appropriately.␊
688 */␊
689/*␊
690static void selectBiosDevice(void)␊
691{␊
692 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
693 CacheReset();␊
694 diskFreeMap(oldMap);␊
695 oldMap = NULL;␊
696␊
697 int dev = selectAlternateBootDevice(gBIOSDev);␊
698␊
699 BVRef bvchain = scanBootVolumes(dev, 0);␊
700 BVRef bootVol = selectBootVolume(bvchain);␊
701 gBootVolume = bootVol;␊
702 setRootVolume(bootVol);␊
703 gBIOSDev = dev;␊
704}␊
705*/␊
706␊
707bool checkOSVersion(const char * version) ␊
708{␊
709␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1]) && (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
710}␊
711␊
712bool getOSVersion()␊
713{␊
714␉bool valid = false;␊
715␉config_file_t systemVersion;␊
716␉const char *val;␊
717␉int len;␊
718␉␊
719␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
720␉{␊
721␉␉valid = true;␊
722␉}␊
723␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
724␉{␊
725␉␉valid = true;␊
726␉}␊
727␉␊
728␉if (valid)␊
729␉{␊
730␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
731␉␉{␊
732␉␉␉// getValueForKey uses const char for val␊
733␉␉␉// so copy it and trim␊
734␉␉␉*gMacOSVersion = '\0';␊
735␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊
736␉␉}␊
737␉␉else␊
738␉␉␉valid = false;␊
739␉}␊
740␉␊
741␉return valid;␊
742}␊
743␊
744#define BASE 65521L /* largest prime smaller than 65536 */␊
745#define NMAX 5000␊
746// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
747␊
748#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
749#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
750#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
751#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
752#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
753␊
754unsigned long Adler32(unsigned char *buf, long len)␊
755{␊
756 unsigned long s1 = 1; // adler & 0xffff;␊
757 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
758 unsigned long result;␊
759 int k;␊
760␊
761 while (len > 0) {␊
762 k = len < NMAX ? len : NMAX;␊
763 len -= k;␊
764 while (k >= 16) {␊
765 DO16(buf);␊
766 buf += 16;␊
767 k -= 16;␊
768 }␊
769 if (k != 0) do {␊
770 s1 += *buf++;␊
771 s2 += s1;␊
772 } while (--k);␊
773 s1 %= BASE;␊
774 s2 %= BASE;␊
775 }␊
776 result = (s2 << 16) | s1;␊
777 return OSSwapHostToBigInt32(result);␊
778}␊
779

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