Chameleon

Chameleon Svn Source Tree

Root/trunk/i386/boot2/boot.c

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

Archive Download this file

Revision: 896