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Source at commit 550 created 13 years 6 months ago.
By meklort, Removed static keyword from moduels. Fixed a few issues. NOTE: ACPI module is currently required for a proper boot.
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 "graphics.h"␊
61␊
62#include "modules.h"␊
63␊
64long gBootMode; /* defaults to 0 == kBootModeNormal */␊
65bool gOverrideKernel;␊
66static char gBootKernelCacheFile[512];␊
67static char gCacheNameAdler[64 + 256];␊
68char *gPlatformName = gCacheNameAdler;␊
69char gRootDevice[512];␊
70char gMKextName[512];␊
71char gMacOSVersion[8];␊
72#ifndef OPTION_ROM␊
73bool gEnableCDROMRescan;␊
74bool gScanSingleDrive;␊
75#endif␊
76␊
77int bvCount = 0;␊
78//int␉menucount = 0;␊
79int gDeviceCount = 0; ␊
80␊
81BVRef bvr;␊
82BVRef menuBVR;␊
83BVRef bvChain;␊
84␊
85//static void selectBiosDevice(void);␊
86static unsigned long Adler32(unsigned char *buffer, long length);␊
87static bool getOSVersion(char *str);␊
88␊
89#ifndef OPTION_ROM␊
90static bool gUnloadPXEOnExit = false;␊
91#endif␊
92␊
93/*␊
94 * How long to wait (in seconds) to load the␊
95 * kernel after displaying the "boot:" prompt.␊
96 */␊
97#define kBootErrorTimeout 5␊
98␊
99/*␊
100 * Default path to kernel cache file␊
101 */␊
102#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"␊
103␊
104//==========================================================================␊
105// Zero the BSS.␊
106␊
107static void zeroBSS(void)␊
108{␊
109␉extern char _DATA__bss__begin, _DATA__bss__end;␊
110␉extern char _DATA__common__begin, _DATA__common__end;␊
111␉␊
112␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
113␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
114}␊
115␊
116//==========================================================================␊
117// Malloc error function␊
118␊
119static void malloc_error(char *addr, size_t size, const char *file, int line)␊
120{␊
121␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
122}␊
123␊
124//==========================================================================␊
125//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
126//␊
127void initialize_runtime(void)␊
128{␊
129␉zeroBSS();␊
130␉malloc_init(0, 0, 0, malloc_error);␊
131}␊
132␊
133//==========================================================================␊
134// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
135␊
136static int ExecKernel(void *binary)␊
137{␊
138 entry_t kernelEntry;␊
139 int ret;␊
140␉␊
141 bootArgs->kaddr = bootArgs->ksize = 0;␊
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 // Load boot drivers from the specifed root path.␊
155␉␊
156 if (!gHaveKernelCache) {␊
157␉␉LoadDrivers("/");␊
158 }␊
159␉␊
160 clearActivityIndicator();␊
161␉␊
162 if (gErrors) {␊
163 printf("Errors encountered while starting up the computer.\n");␊
164 printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
165 sleep(kBootErrorTimeout);␊
166 }␊
167␉␊
168␉md0Ramdisk();␊
169␉␊
170 setupFakeEfi();␊
171␉␉␊
172 verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
173#ifndef OPTION_ROM␊
174 // Cleanup the PXE base code.␊
175␉␊
176 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
177␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
178 {␊
179 ␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
180 sleep(2);␊
181 }␊
182 }␊
183#endif ␊
184 bool dummyVal;␊
185␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊
186␉␉printf("Press any key to continue...");␊
187␉␉getc();␊
188␉}␊
189␉␉␊
190␉if (bootArgs->Video.v_display == VGA_TEXT_MODE)␊
191␉{␊
192␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
193␉}␊
194␉// Draw gray screen. NOTE: no boot image, that's in the gui module␊
195␉if(!gVerboseMode) drawColorRectangle(0, 0, DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT, 0x01); ␊
196␊
197␉␊
198␉setupBooterLog();␊
199␉␊
200 finalizeBootStruct();␊
201 ␉␊
202␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
203␊
204␉// Jump to kernel's entry point. There's no going back now.␊
205 startprog( kernelEntry, bootArgs );␊
206␉␊
207 // Not reached␊
208␉␊
209 return 0;␊
210}␊
211␊
212//==========================================================================␊
213// This is the entrypoint from real-mode which functions exactly as it did␊
214// before. Multiboot does its own runtime initialization, does some of its␊
215// own things, and then calls common_boot.␊
216void boot(int biosdev)␊
217{␊
218␉initialize_runtime();␊
219␉// Enable A20 gate before accessing memory above 1Mb.␊
220␉enableA20();␊
221␉common_boot(biosdev);␊
222}␊
223␊
224//==========================================================================␊
225// The 'main' function for the booter. Called by boot0 when booting␊
226// from a block device, or by the network booter.␊
227//␊
228// arguments:␊
229// biosdev - Value passed from boot1/NBP to specify the device␊
230// that the booter was loaded from.␊
231//␊
232// If biosdev is kBIOSDevNetwork, then this function will return if␊
233// booting was unsuccessful. This allows the PXE firmware to try the␊
234// next boot device on its list.␊
235void common_boot(int biosdev)␊
236{␊
237 int status;␊
238 char *bootFile;␊
239 unsigned long adler32;␊
240 bool quiet;␊
241 bool firstRun = true;␊
242 bool instantMenu;␊
243#ifndef OPTION_ROM␊
244 bool rescanPrompt;␊
245#endif␊
246 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
247 unsigned int denyBVFlags = kBVFlagEFISystem;␊
248␉␊
249#ifndef OPTION_ROM␊
250 // Set reminder to unload the PXE base code. Neglect to unload␊
251 // the base code will result in a hang or kernel panic.␊
252 gUnloadPXEOnExit = true;␊
253#endif␊
254␉␊
255 // Record the device that the booter was loaded from.␊
256 gBIOSDev = biosdev & kBIOSDevMask;␊
257␉␊
258 // Initialize boot info structure.␊
259 initKernBootStruct();␊
260␉␊
261␉initBooterLog();␊
262␉␊
263 // Setup VGA text mode.␊
264 // Not sure if it is safe to call setVideoMode() before the␊
265 // config table has been loaded. Call video_mode() instead.␊
266#if DEBUG␊
267 printf("before video_mode\n");␊
268#endif␊
269 video_mode( 2 ); // 80x25 mono text mode.␊
270#if DEBUG␊
271 printf("after video_mode\n");␊
272#endif␊
273␉␊
274 // Scan and record the system's hardware information.␊
275 scan_platform();␊
276␉␊
277 // First get info for boot volume.␊
278 scanBootVolumes(gBIOSDev, 0);␊
279 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
280 setBootGlobals(bvChain);␊
281␉␊
282 // Load boot.plist config file␊
283 status = loadSystemConfig(&bootInfo->bootConfig);␊
284␉␊
285 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
286 gBootMode |= kBootModeQuiet;␊
287 }␊
288␉␊
289 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
290 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
291 firstRun = false;␊
292 }␊
293␉␊
294#ifndef OPTION_ROM␊
295␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
296 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
297 gScanSingleDrive = true;␊
298 }␊
299␉␊
300␉// Create a list of partitions on device(s).␊
301 if (gScanSingleDrive)␊
302␉{␊
303␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
304 } ␊
305␉else ␊
306#endif␊
307␉{␊
308␉␉scanDisks(gBIOSDev, &bvCount);␊
309 }␊
310␉␊
311␉// Create a separated bvr chain using the specified filters.␊
312 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
313␉gBootVolume = selectBootVolume(bvChain);␊
314␉␊
315␉␊
316␉// Intialize module system␊
317␉if(init_module_system())␊
318␉{␊
319␉␉load_all_modules();␊
320␉}␊
321␉␊
322␉␊
323#ifndef OPTION_ROM␊
324 // Loading preboot ramdisk if exists.␊
325 loadPrebootRAMDisk();␊
326␉␊
327 // Disable rescan option by default␊
328 gEnableCDROMRescan = false;␊
329␉␊
330 // Enable it with Rescan=y in system config␊
331 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
332 gEnableCDROMRescan = true;␊
333 }␊
334␉␊
335 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
336 rescanPrompt = false;␊
337 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
338 gEnableCDROMRescan = promptForRescanOption();␊
339 }␊
340#endif␊
341␉␊
342␊
343␉␊
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 getc();␊
349#endif␊
350␉␊
351␉␊
352␉␊
353 setBootGlobals(bvChain);␊
354␉␊
355 // Parse args, load and start kernel.␊
356 while (1) {␊
357 const char *val;␊
358 int len;␊
359 int trycache;␊
360 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
361 int ret = -1;␊
362 void *binary = (void *)kLoadAddr;␊
363 bool tryresume;␊
364 bool tryresumedefault;␊
365 bool forceresume;␊
366␉␉␊
367 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
368 char bootFileSpec[512];␊
369␉␉␊
370 // Initialize globals.␊
371␉␉␊
372 sysConfigValid = false;␊
373 gErrors = false;␊
374␉␉␊
375 status = getBootOptions(firstRun);␊
376 firstRun = false;␊
377 if (status == -1) continue;␊
378␉␉␊
379 status = processBootOptions();␊
380 // Status==1 means to chainboot␊
381 if ( status == 1 ) break;␊
382 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
383 if ( status == -1 )␊
384 {␊
385␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
386␉␉␉if(gBootVolume == NULL)␊
387␉␉␉{␊
388␉␉␉␉freeFilteredBVChain(bvChain);␊
389#ifndef OPTION_ROM␊
390␉␉␉␉if (gEnableCDROMRescan)␊
391␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
392#endif␊
393␉␉␉␉␊
394␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
395␉␉␉␉setBootGlobals(bvChain);␊
396␉␉␉}␊
397␉␉␉continue;␊
398 }␊
399␉␉␊
400␉␉␊
401␉␉␊
402 // Other status (e.g. 0) means that we should proceed with boot.␊
403␉␉␉␉␊
404␉␉// Notify moduals that we are attempting to boot␊
405␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
406␉␉␊
407␉␉// Find out which version mac os we're booting.␊
408␉␉getOSVersion(gMacOSVersion);␊
409␉␉␊
410␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
411␉␉␉archCpuType = CPU_TYPE_X86_64;␊
412␉␉} else {␊
413␉␉␉archCpuType = CPU_TYPE_I386;␊
414␉␉}␊
415␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
416␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
417␉␉␉␉archCpuType = CPU_TYPE_I386;␊
418␉␉␉}␊
419␉␉}␊
420␉␉␊
421␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
422␉␉␉tryresume = true;␊
423␉␉␉tryresumedefault = true;␊
424␉␉} else {␊
425␉␉␉tryresumedefault = false;␊
426␉␉}␊
427␉␉␊
428␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
429␉␉␉forceresume = false;␊
430␉␉}␊
431␉␉␊
432␉␉if (forceresume) {␊
433␉␉␉tryresume = true;␊
434␉␉␉tryresumedefault = false;␊
435␉␉}␊
436␉␉␊
437␉␉while (tryresume) {␊
438␉␉␉const char *tmp;␊
439␉␉␉BVRef bvr;␊
440␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
441␉␉␉␉val="/private/var/vm/sleepimage";␊
442␉␉␉␊
443␉␉␉// Do this first to be sure that root volume is mounted␊
444␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
445␉␉␉␊
446␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
447␉␉␉␉break;␊
448␉␉␉␊
449␉␉␉// Can't check if it was hibernation Wake=y is required␊
450␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
451␉␉␉␉break;␊
452␉␉␉␊
453␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
454␉␉␉␉break;␊
455␉␉␉␊
456␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
457␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
458␉␉␉␉break;␊
459␉␉␉}␊
460␉␉␉␊
461␉␉␉HibernateBoot((char *)val);␊
462␉␉␉break;␊
463␉␉}␊
464␉␉␊
465 // Reset cache name.␊
466 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
467␉␉␊
468 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
469␉␉␊
470 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
471␉␉␊
472 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
473 strlcpy(gBootKernelCacheFile, val, len+1);␊
474 } else {␊
475 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);␊
476 }␊
477␉␉␊
478 // Check for cache file.␊
479 trycache = (((gBootMode & kBootModeSafe) == 0) &&␊
480 !gOverrideKernel &&␊
481 (gBootFileType == kBlockDeviceType) &&␊
482 (gMKextName[0] == '\0') &&␊
483 (gBootKernelCacheFile[0] != '\0'));␊
484␉␉␊
485␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
486␉␉␊
487 if (trycache) do {␊
488␉␉␉␊
489 // if we haven't found the kernel yet, don't use the cache␊
490 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
491 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
492 trycache = 0;␊
493 break;␊
494 }␊
495 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
496 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
497 || (cachetime < kerneltime)) {␊
498 trycache = 0;␊
499 break;␊
500 }␊
501 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
502 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
503 && (cachetime < exttime)) {␊
504 trycache = 0;␊
505 break;␊
506 }␊
507 if (kerneltime > exttime) {␊
508 exttime = kerneltime;␊
509 }␊
510 if (cachetime != (exttime + 1)) {␊
511 trycache = 0;␊
512 break;␊
513 }␊
514 } while (0);␊
515␉␉␊
516 do {␊
517 if (trycache) {␊
518 bootFile = gBootKernelCacheFile;␊
519 verbose("Loading kernel cache %s\n", bootFile);␊
520 ret = LoadFile(bootFile);␊
521 binary = (void *)kLoadAddr;␊
522 if (ret >= 0) {␊
523 break;␊
524 }␊
525 }␊
526 bootFile = bootInfo->bootFile;␊
527␉␉␉␊
528 // Try to load kernel image from alternate locations on boot helper partitions.␊
529 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
530 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
531 ␉ ␉ if (ret == -1)␊
532 ␉ ␉ {␊
533␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
534␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
535␉␉␉␉if (ret == -1)␊
536␉␉␉␉{␊
537␉␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
538␉␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
539␉␉␉␉␉if (ret == -1)␊
540␉␉␉␉␉{␊
541␉␉␉␉␉␉// Not found any alternate locations, using the original kernel image path.␊
542␉␉␉␉␉␉strcpy(bootFileSpec, bootFile);␊
543␉␉␉␉␉}␊
544␉␉␉␉}␊
545 }␊
546␉␉␉␊
547 verbose("Loading kernel %s\n", bootFileSpec);␊
548 ret = LoadThinFatFile(bootFileSpec, &binary);␊
549 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
550 {␊
551␉␉␉␉archCpuType = CPU_TYPE_I386;␊
552␉␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
553 }␊
554␉␉␉␊
555 } while (0);␊
556␉␉␊
557 clearActivityIndicator();␊
558#if DEBUG␊
559 printf("Pausing...");␊
560 sleep(8);␊
561#endif␊
562␉␉␊
563 if (ret <= 0) {␊
564␉␉␉printf("Can't find %s\n", bootFile);␊
565␉␉␉␊
566␉␉␉sleep(1);␊
567#ifndef OPTION_ROM␊
568 if (gBootFileType == kNetworkDeviceType) {␊
569 // Return control back to PXE. Don't unload PXE base code.␊
570 gUnloadPXEOnExit = false;␊
571 break;␊
572 }␊
573#endif␊
574 } else {␊
575 /* Won't return if successful. */␊
576␉␉␉// Notify modules that ExecKernel is about to be called␊
577␉␉␉execute_hook("ExecKernel", binary, NULL, NULL, NULL);␊
578 ret = ExecKernel(binary);␊
579 }␊
580 }␊
581 ␊
582 // chainboot␊
583 if (status==1) {␊
584␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
585␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
586␉␉}␊
587 }␊
588#ifndef OPTION_ROM␊
589 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
590␉␉nbpUnloadBaseCode();␊
591 }␊
592#endif␊
593}␊
594␊
595/*!␊
596 Selects a new BIOS device, taking care to update the global state appropriately.␊
597 */␊
598/*␊
599 static void selectBiosDevice(void)␊
600 {␊
601 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
602 CacheReset();␊
603 diskFreeMap(oldMap);␊
604 oldMap = NULL;␊
605 ␊
606 int dev = selectAlternateBootDevice(gBIOSDev);␊
607 ␊
608 BVRef bvchain = scanBootVolumes(dev, 0);␊
609 BVRef bootVol = selectBootVolume(bvchain);␊
610 gBootVolume = bootVol;␊
611 setRootVolume(bootVol);␊
612 gBIOSDev = dev;␊
613 }␊
614 */␊
615␊
616static bool getOSVersion(char *str)␊
617{␊
618␉bool valid = false;␊
619␉config_file_t systemVersion;␊
620␉const char *val;␊
621␉int len;␊
622␉␊
623␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
624␉{␊
625␉␉valid = true;␊
626␉}␊
627␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
628␉{␊
629␉␉valid = true;␊
630␉}␊
631␉␊
632␉if (valid)␊
633␉{␊
634␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
635␉␉{␊
636␉␉␉// getValueForKey uses const char for val␊
637␉␉␉// so copy it and trim␊
638␉␉␉*str = '\0';␊
639␉␉␉strncat(str, val, MIN(len, 4));␊
640␉␉}␊
641␉␉else␊
642␉␉␉valid = false;␊
643␉}␊
644␉␊
645␉return valid;␊
646}␊
647␊
648#define BASE 65521L /* largest prime smaller than 65536 */␊
649#define NMAX 5000␊
650// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
651␊
652#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
653#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
654#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
655#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
656#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
657␊
658unsigned long Adler32(unsigned char *buf, long len)␊
659{␊
660 unsigned long s1 = 1; // adler & 0xffff;␊
661 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
662 unsigned long result;␊
663 int k;␊
664␉␊
665 while (len > 0) {␊
666 k = len < NMAX ? len : NMAX;␊
667 len -= k;␊
668 while (k >= 16) {␊
669 DO16(buf);␊
670 buf += 16;␊
671 k -= 16;␊
672 }␊
673 if (k != 0) do {␊
674 s1 += *buf++;␊
675 s2 += s1;␊
676 } while (--k);␊
677 s1 %= BASE;␊
678 s2 %= BASE;␊
679 }␊
680 result = (s2 << 16) | s1;␊
681 return OSSwapHostToBigInt32(result);␊
682}␊
683

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