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Source at commit 533 created 13 years 7 months ago.
By meklort, GUI module should now work in the four main cases (combo of embededtheme and /Extra/Themes). Only tested on my machines.
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 "platform.h"␊
60#include "modules.h"␊
61␊
62long gBootMode; /* defaults to 0 == kBootModeNormal */␊
63bool gOverrideKernel;␊
64static char gBootKernelCacheFile[512];␊
65static char gCacheNameAdler[64 + 256];␊
66char *gPlatformName = gCacheNameAdler;␊
67char gRootDevice[512];␊
68char gMKextName[512];␊
69char gMacOSVersion[8];␊
70bool gEnableCDROMRescan;␊
71bool gScanSingleDrive;␊
72␊
73int bvCount = 0;␊
74//int␉menucount = 0;␊
75int gDeviceCount = 0; ␊
76␊
77bool␉recoveryMode = false;␊
78␊
79BVRef bvr;␊
80BVRef menuBVR;␊
81BVRef bvChain;␊
82␊
83//static void selectBiosDevice(void);␊
84static unsigned long Adler32(unsigned char *buffer, long length);␊
85static bool getOSVersion(char *str);␊
86␊
87static bool gUnloadPXEOnExit = false;␊
88␊
89/*␊
90 * How long to wait (in seconds) to load the␊
91 * kernel after displaying the "boot:" prompt.␊
92 */␊
93#define kBootErrorTimeout 5␊
94␊
95/*␊
96 * Default path to kernel cache file␊
97 */␊
98#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"␊
99␊
100//==========================================================================␊
101// Zero the BSS.␊
102␊
103static void zeroBSS(void)␊
104{␊
105␉extern char _DATA__bss__begin, _DATA__bss__end;␊
106␉extern char _DATA__common__begin, _DATA__common__end;␊
107␉␊
108␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
109␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
110}␊
111␊
112//==========================================================================␊
113// Malloc error function␊
114␊
115static void malloc_error(char *addr, size_t size, const char *file, int line)␊
116{␊
117␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
118}␊
119␊
120//==========================================================================␊
121//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
122//␊
123void initialize_runtime(void)␊
124{␊
125␉zeroBSS();␊
126␉malloc_init(0, 0, 0, malloc_error);␊
127}␊
128␊
129//==========================================================================␊
130// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
131␊
132static int ExecKernel(void *binary)␊
133{␊
134 entry_t kernelEntry;␊
135 int ret;␊
136␉␊
137 bootArgs->kaddr = bootArgs->ksize = 0;␊
138␉␊
139 ret = DecodeKernel(binary,␊
140 &kernelEntry,␊
141 (char **) &bootArgs->kaddr,␊
142 (int *)&bootArgs->ksize );␊
143␉␊
144 if ( ret != 0 )␊
145 return ret;␊
146␉␊
147 // Reserve space for boot args␊
148 reserveKernBootStruct();␊
149␉␊
150 // Load boot drivers from the specifed root path.␊
151␉␊
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␉md0Ramdisk();␊
165␉␊
166 setupFakeEfi();␊
167␉␊
168 md0Ramdisk();␊
169␉␊
170 verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
171␉␊
172 // Cleanup the PXE base code.␊
173␉␊
174 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
175␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
176 {␊
177 ␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
178 sleep(2);␊
179 }␊
180 }␊
181␉␊
182 bool dummyVal;␊
183␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊
184␉␉printf("Press any key to continue...");␊
185␉␉getc();␊
186␉}␊
187␉␊
188␉usb_loop();␊
189␉␊
190 // If we were in text mode, switch to graphics mode.␊
191 // This will draw the boot graphics unless we are in␊
192 // verbose mode.␊
193␉␊
194 if(gVerboseMode)␊
195␉{␊
196␉␉if (bootArgs->Video.v_display == VGA_TEXT_MODE)␊
197␉␉{␊
198␉␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
199␉␉}␊
200␉␉␊
201␉}␊
202␊
203␉setupBooterLog();␊
204␉␊
205 finalizeBootStruct();␊
206 ␊
207␉usb_loop();␊
208␉␊
209␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
210␉␊
211␉// Jump to kernel's entry point. There's no going back now.␊
212 startprog( kernelEntry, bootArgs );␊
213␉␊
214 // Not reached␊
215␉␊
216 return 0;␊
217}␊
218␊
219//==========================================================================␊
220// This is the entrypoint from real-mode which functions exactly as it did␊
221// before. Multiboot does its own runtime initialization, does some of its␊
222// own things, and then calls common_boot.␊
223void boot(int biosdev)␊
224{␊
225␉initialize_runtime();␊
226␉// Enable A20 gate before accessing memory above 1Mb.␊
227␉enableA20();␊
228␉common_boot(biosdev);␊
229}␊
230␊
231//==========================================================================␊
232// The 'main' function for the booter. Called by boot0 when booting␊
233// from a block device, or by the network booter.␊
234//␊
235// arguments:␊
236// biosdev - Value passed from boot1/NBP to specify the device␊
237// that the booter was loaded from.␊
238//␊
239// If biosdev is kBIOSDevNetwork, then this function will return if␊
240// booting was unsuccessful. This allows the PXE firmware to try the␊
241// next boot device on its list.␊
242void common_boot(int biosdev)␊
243{␊
244 int status;␊
245 char *bootFile;␊
246 unsigned long adler32;␊
247 bool quiet;␊
248 bool firstRun = true;␊
249 bool instantMenu;␊
250 bool rescanPrompt;␊
251 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
252 unsigned int denyBVFlags = kBVFlagEFISystem;␊
253␉␊
254 // Set reminder to unload the PXE base code. Neglect to unload␊
255 // the base code will result in a hang or kernel panic.␊
256 gUnloadPXEOnExit = true;␊
257␉␊
258 // Record the device that the booter was loaded from.␊
259 gBIOSDev = biosdev & kBIOSDevMask;␊
260␉␊
261 // Initialize boot info structure.␊
262 initKernBootStruct();␊
263␉␊
264␉initBooterLog();␊
265␉␊
266 // Setup VGA text mode.␊
267 // Not sure if it is safe to call setVideoMode() before the␊
268 // config table has been loaded. Call video_mode() instead.␊
269#if DEBUG␊
270 printf("before video_mode\n");␊
271#endif␊
272 video_mode( 2 ); // 80x25 mono text mode.␊
273#if DEBUG␊
274 printf("after video_mode\n");␊
275#endif␊
276␉␊
277 // Scan and record the system's hardware information.␊
278 scan_platform();␊
279␉␊
280 // First get info for boot volume.␊
281 scanBootVolumes(gBIOSDev, 0);␊
282 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
283 setBootGlobals(bvChain);␊
284␉␊
285 // Load boot.plist config file␊
286 status = loadSystemConfig(&bootInfo->bootConfig);␊
287␉␊
288 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
289 gBootMode |= kBootModeQuiet;␊
290 }␊
291␉␊
292 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
293 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
294 firstRun = false;␊
295 }␊
296␉␊
297␊
298␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
299 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
300 gScanSingleDrive = true;␊
301 }␊
302␉␊
303␉// Create a list of partitions on device(s).␊
304 if (gScanSingleDrive) {␊
305␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
306 } else {␊
307␉␉scanDisks(gBIOSDev, &bvCount);␊
308 }␊
309␉␊
310␉// Create a separated bvr chain using the specified filters.␊
311 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
312␉gBootVolume = selectBootVolume(bvChain);␊
313␉␊
314␉␊
315␉// Intialize module system␊
316␉if(init_module_system())␊
317␉{␊
318␉␉load_all_modules();␊
319␉}␊
320␉␊
321␉␊
322␉␊
323 // Loading preboot ramdisk if exists.␊
324 loadPrebootRAMDisk();␊
325␉␊
326 // Disable rescan option by default␊
327 gEnableCDROMRescan = false;␊
328␉␊
329 // Enable it with Rescan=y in system config␊
330 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
331 gEnableCDROMRescan = true;␊
332 }␊
333␉␊
334 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
335 rescanPrompt = false;␊
336 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
337 gEnableCDROMRescan = promptForRescanOption();␊
338 }␊
339␉␊
340␊
341␉␊
342␉␊
343#if DEBUG␊
344 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
345 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
346 getc();␊
347#endif␊
348␉␊
349␉␊
350␉␊
351 setBootGlobals(bvChain);␊
352␉␊
353 // Parse args, load and start kernel.␊
354 while (1) {␊
355 const char *val;␊
356 int len;␊
357 int trycache;␊
358 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
359 int ret = -1;␊
360 void *binary = (void *)kLoadAddr;␊
361 bool tryresume;␊
362 bool tryresumedefault;␊
363 bool forceresume;␊
364␉␉␊
365 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
366 char bootFileSpec[512];␊
367␉␉␊
368 // Initialize globals.␊
369␉␉␊
370 sysConfigValid = false;␊
371 gErrors = false;␊
372␉␉␊
373 status = getBootOptions(firstRun);␊
374 firstRun = false;␊
375 if (status == -1) continue;␊
376␉␉␊
377 status = processBootOptions();␊
378 // Status==1 means to chainboot␊
379 if ( status == 1 ) break;␊
380 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
381 if ( status == -1 )␊
382 {␊
383␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
384␉␉␉if(gBootVolume == NULL)␊
385␉␉␉{␊
386␉␉␉␉freeFilteredBVChain(bvChain);␊
387␉␉␉␉␊
388␉␉␉␉if (gEnableCDROMRescan)␊
389␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
390␉␉␉␉␊
391␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
392␉␉␉␉setBootGlobals(bvChain);␊
393␉␉␉}␊
394␉␉␉continue;␊
395 }␊
396␉␉␊
397␉␉␊
398␉␉␊
399 // Other status (e.g. 0) means that we should proceed with boot.␊
400␉␉␉␉␊
401␉␉// Notify moduals that we are attempting to boot␊
402␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
403␉␉␊
404␉␉// Find out which version mac os we're booting.␊
405␉␉getOSVersion(gMacOSVersion);␊
406␉␉␊
407␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
408␉␉␉archCpuType = CPU_TYPE_X86_64;␊
409␉␉} else {␊
410␉␉␉archCpuType = CPU_TYPE_I386;␊
411␉␉}␊
412␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
413␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
414␉␉␉␉archCpuType = CPU_TYPE_I386;␊
415␉␉␉}␊
416␉␉}␊
417␉␉␊
418␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
419␉␉␉tryresume = true;␊
420␉␉␉tryresumedefault = true;␊
421␉␉} else {␊
422␉␉␉tryresumedefault = false;␊
423␉␉}␊
424␉␉␊
425␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
426␉␉␉forceresume = false;␊
427␉␉}␊
428␉␉␊
429␉␉if (forceresume) {␊
430␉␉␉tryresume = true;␊
431␉␉␉tryresumedefault = false;␊
432␉␉}␊
433␉␉␊
434␉␉while (tryresume) {␊
435␉␉␉const char *tmp;␊
436␉␉␉BVRef bvr;␊
437␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
438␉␉␉␉val="/private/var/vm/sleepimage";␊
439␉␉␉␊
440␉␉␉// Do this first to be sure that root volume is mounted␊
441␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
442␉␉␉␊
443␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
444␉␉␉␉break;␊
445␉␉␉␊
446␉␉␉// Can't check if it was hibernation Wake=y is required␊
447␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
448␉␉␉␉break;␊
449␉␉␉␊
450␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
451␉␉␉␉break;␊
452␉␉␉␊
453␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
454␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
455␉␉␉␉break;␊
456␉␉␉}␊
457␉␉␉␊
458␉␉␉HibernateBoot((char *)val);␊
459␉␉␉break;␊
460␉␉}␊
461␉␉␊
462 // Reset cache name.␊
463 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
464␉␉␊
465 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
466␉␉␊
467 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
468␉␉␊
469 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
470 strlcpy(gBootKernelCacheFile, val, len+1);␊
471 } else {␊
472 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);␊
473 }␊
474␉␉␊
475 // Check for cache file.␊
476 trycache = (((gBootMode & kBootModeSafe) == 0) &&␊
477 !gOverrideKernel &&␊
478 (gBootFileType == kBlockDeviceType) &&␊
479 (gMKextName[0] == '\0') &&␊
480 (gBootKernelCacheFile[0] != '\0'));␊
481␉␉␊
482␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
483␉␉␊
484 if (trycache) do {␊
485␉␉␉␊
486 // if we haven't found the kernel yet, don't use the cache␊
487 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
488 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
489 trycache = 0;␊
490 break;␊
491 }␊
492 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
493 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
494 || (cachetime < kerneltime)) {␊
495 trycache = 0;␊
496 break;␊
497 }␊
498 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
499 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
500 && (cachetime < exttime)) {␊
501 trycache = 0;␊
502 break;␊
503 }␊
504 if (kerneltime > exttime) {␊
505 exttime = kerneltime;␊
506 }␊
507 if (cachetime != (exttime + 1)) {␊
508 trycache = 0;␊
509 break;␊
510 }␊
511 } while (0);␊
512␉␉␊
513 do {␊
514 if (trycache) {␊
515 bootFile = gBootKernelCacheFile;␊
516 verbose("Loading kernel cache %s\n", bootFile);␊
517 ret = LoadFile(bootFile);␊
518 binary = (void *)kLoadAddr;␊
519 if (ret >= 0) {␊
520 break;␊
521 }␊
522 }␊
523 bootFile = bootInfo->bootFile;␊
524␉␉␉␊
525 // Try to load kernel image from alternate locations on boot helper partitions.␊
526 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
527 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
528 ␉ ␉ if (ret == -1)␊
529 ␉ ␉ {␊
530␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
531␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
532␉␉␉␉if (ret == -1)␊
533␉␉␉␉{␊
534␉␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
535␉␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
536␉␉␉␉␉if (ret == -1)␊
537␉␉␉␉␉{␊
538␉␉␉␉␉␉// Not found any alternate locations, using the original kernel image path.␊
539␉␉␉␉␉␉strcpy(bootFileSpec, bootFile);␊
540␉␉␉␉␉}␊
541␉␉␉␉}␊
542 }␊
543␉␉␉␊
544 verbose("Loading kernel %s\n", bootFileSpec);␊
545 ret = LoadThinFatFile(bootFileSpec, &binary);␊
546 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
547 {␊
548␉␉␉␉archCpuType = CPU_TYPE_I386;␊
549␉␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
550 }␊
551␉␉␉␊
552 } while (0);␊
553␉␉␊
554 clearActivityIndicator();␊
555#if DEBUG␊
556 printf("Pausing...");␊
557 sleep(8);␊
558#endif␊
559␉␉␊
560 if (ret <= 0) {␊
561␉␉␉printf("Can't find %s\n", bootFile);␊
562␉␉␉␊
563␉␉␉sleep(1);␊
564␉␉␉␊
565 if (gBootFileType == kNetworkDeviceType) {␊
566 // Return control back to PXE. Don't unload PXE base code.␊
567 gUnloadPXEOnExit = false;␊
568 break;␊
569 }␊
570 } else {␊
571 /* Won't return if successful. */␊
572␉␉␉// Notify modules that ExecKernel is about to be called␊
573␉␉␉execute_hook("ExecKernel", binary, NULL, NULL, NULL);␊
574 ret = ExecKernel(binary);␊
575 }␊
576 }␊
577 ␊
578 // chainboot␊
579 if (status==1) {␊
580␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
581␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
582␉␉}␊
583 }␊
584␉␊
585 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
586␉␉nbpUnloadBaseCode();␊
587 }␊
588}␊
589␊
590/*!␊
591 Selects a new BIOS device, taking care to update the global state appropriately.␊
592 */␊
593/*␊
594 static void selectBiosDevice(void)␊
595 {␊
596 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
597 CacheReset();␊
598 diskFreeMap(oldMap);␊
599 oldMap = NULL;␊
600 ␊
601 int dev = selectAlternateBootDevice(gBIOSDev);␊
602 ␊
603 BVRef bvchain = scanBootVolumes(dev, 0);␊
604 BVRef bootVol = selectBootVolume(bvchain);␊
605 gBootVolume = bootVol;␊
606 setRootVolume(bootVol);␊
607 gBIOSDev = dev;␊
608 }␊
609 */␊
610␊
611static bool getOSVersion(char *str)␊
612{␊
613␉bool valid = false;␊
614␉config_file_t systemVersion;␊
615␉const char *val;␊
616␉int len;␊
617␉␊
618␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
619␉{␊
620␉␉valid = true;␊
621␉}␊
622␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
623␉{␊
624␉␉valid = true;␊
625␉}␊
626␉␊
627␉if (valid)␊
628␉{␊
629␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
630␉␉{␊
631␉␉␉// getValueForKey uses const char for val␊
632␉␉␉// so copy it and trim␊
633␉␉␉*str = '\0';␊
634␉␉␉strncat(str, val, MIN(len, 4));␊
635␉␉}␊
636␉␉else␊
637␉␉␉valid = false;␊
638␉}␊
639␉␊
640␉return valid;␊
641}␊
642␊
643#define BASE 65521L /* largest prime smaller than 65536 */␊
644#define NMAX 5000␊
645// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
646␊
647#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
648#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
649#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
650#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
651#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
652␊
653unsigned long Adler32(unsigned char *buf, long len)␊
654{␊
655 unsigned long s1 = 1; // adler & 0xffff;␊
656 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
657 unsigned long result;␊
658 int k;␊
659␉␊
660 while (len > 0) {␊
661 k = len < NMAX ? len : NMAX;␊
662 len -= k;␊
663 while (k >= 16) {␊
664 DO16(buf);␊
665 buf += 16;␊
666 k -= 16;␊
667 }␊
668 if (k != 0) do {␊
669 s1 += *buf++;␊
670 s2 += s1;␊
671 } while (--k);␊
672 s1 %= BASE;␊
673 s2 %= BASE;␊
674 }␊
675 result = (s2 << 16) | s1;␊
676 return OSSwapHostToBigInt32(result);␊
677}␊
678

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