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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/* ␊
26 * Mach Operating System␊
27 * Copyright (c) 1990 Carnegie-Mellon University␊
28 * Copyright (c) 1989 Carnegie-Mellon University␊
29 * All rights reserved.␉ The CMU software License Agreement specifies␊
30 * the terms and conditions for use and redistribution.␊
31 */␊
32␊
33/*␊
34 *␉␉␉INTEL CORPORATION PROPRIETARY INFORMATION␊
35 *␊
36 *␉This software is supplied under the terms of a license␉agreement or ␊
37 *␉nondisclosure agreement with Intel Corporation and may not be copied ␊
38 *␉nor disclosed except in accordance with the terms of that agreement.␊
39 *␊
40 *␉Copyright 1988, 1989 by Intel Corporation␊
41 */␊
42␊
43/*␊
44 * Copyright 1993 NeXT Computer, Inc.␊
45 * All rights reserved.␊
46 */␊
47␊
48/*␊
49 * Completely reworked by Sam Streeper (sam_s@NeXT.com)␊
50 * Reworked again by Curtis Galloway (galloway@NeXT.com)␊
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␊
63/*␊
64 * How long to wait (in seconds) to load the␊
65 * kernel after displaying the "boot:" prompt.␊
66 */␊
67#define kBootErrorTimeout 5␊
68␊
69bool␉␉gOverrideKernel, gEnableCDROMRescan, gScanSingleDrive, useGUI;␊
70static bool␉gUnloadPXEOnExit = false;␊
71␊
72static char␉gCacheNameAdler[64 + 256];␊
73char␉␉*gPlatformName = gCacheNameAdler;␊
74␊
75char␉␉gRootDevice[512];␊
76char␉␉gMKextName[512];␊
77char␉␉gMacOSVersion[8];␊
78int␉␉␉bvCount = 0, gDeviceCount = 0;␊
79//int␉␉menucount = 0;␊
80long␉␉gBootMode; /* defaults to 0 == kBootModeNormal */␊
81BVRef␉␉bvr, menuBVR, bvChain;␊
82␊
83static bool␉␉␉␉checkOSVersion(const char * version);␊
84static bool␉␉␉␉getOSVersion();␊
85static unsigned long␉Adler32(unsigned char *buffer, long length);␊
86//static void␉␉␉selectBiosDevice(void);␊
87␊
88/** options.c **/␊
89extern char* msgbuf;␊
90void showTextBuffer(char *buf, int size);␊
91␊
92␊
93//==========================================================================␊
94// Zero the BSS.␊
95␊
96static void zeroBSS(void)␊
97{␊
98␉extern char _DATA__bss__begin, _DATA__bss__end;␊
99␉extern char _DATA__common__begin, _DATA__common__end;␊
100␉␊
101␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
102␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
103}␊
104␊
105//==========================================================================␊
106// Malloc error function␊
107␊
108static void malloc_error(char *addr, size_t size, const char *file, int line)␊
109{␊
110␉stop("\nMemory allocation error! Addr: 0x%x, Size: 0x%x, File: %s, Line: %d\n",␊
111␉␉␉␉␉␉␉␉␉ (unsigned)addr, (unsigned)size, file, line);␊
112}␊
113␊
114//==========================================================================␊
115//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
116//␊
117void initialize_runtime(void)␊
118{␊
119␉zeroBSS();␊
120␉malloc_init(0, 0, 0, malloc_error);␊
121}␊
122␊
123//==========================================================================␊
124// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
125␊
126static int ExecKernel(void *binary)␊
127{␊
128␉int␉␉␉ret;␊
129␉entry_t␉␉kernelEntry;␊
130␉␊
131␉bootArgs->kaddr = bootArgs->ksize = 0;␊
132␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
133␉␊
134␉ret = DecodeKernel(binary,␊
135␉␉␉␉␉ &kernelEntry,␊
136␉␉␉␉␉ (char **) &bootArgs->kaddr,␊
137␉␉␉␉␉ (int *)&bootArgs->ksize );␊
138␉␊
139␉if ( ret != 0 )␊
140␉␉return ret;␊
141␉␊
142␉// Reserve space for boot args␊
143␉reserveKernBootStruct();␊
144␉␊
145␉// Notify modules that the kernel has been decoded␊
146␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊
147␉␊
148␉setupFakeEfi();␊
149␉␊
150␉// Load boot drivers from the specifed root path.␊
151␉//if (!gHaveKernelCache)␊
152␉LoadDrivers("/");␊
153␉␊
154␉execute_hook("DriversLoaded", (void*)binary, NULL, NULL, NULL);␊
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␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
167␉␊
168␉// Cleanup the PXE base code.␊
169␉␊
170␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
171␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
172␉␉{␊
173␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
174␉␉␉sleep(2);␊
175␉␉}␊
176␉}␊
177␉␊
178␉bool dummyVal;␊
179␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->chameleonConfig) && dummyVal) {␊
180␉␉showTextBuffer(msgbuf, strlen(msgbuf));␊
181␉}␊
182␉␊
183␉usb_loop();␊
184␉␊
185␉// Notify modules that the kernel is about to be started␊
186␉if (checkOSVersion("10.7"))␊
187␉{␊
188␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␊
189␉}␊
190␉else␊
191␉{␊
192␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␊
193␉}␊
194␉␊
195␉// If we were in text mode, switch to graphics mode.␊
196␉// This will draw the boot graphics unless we are in␊
197␉// verbose mode.␊
198␉if (gVerboseMode)␊
199␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
200␉else␊
201␉␉drawBootGraphics();␊
202␉␊
203␉setupBooterLog();␊
204␉␊
205␉finalizeBootStruct();␊
206␉␊
207␉// Jump to kernel's entry point. There's no going back now.␊
208␉if (checkOSVersion("10.7")) {␊
209␉␉␊
210␉␉// Masking out so that Lion doesn't doublefault␊
211␉␉outb(0x21, 0xff);␉/* Maskout all interrupts Pic1 */␊
212␉␉outb(0xa1, 0xff);␉/* Maskout all interrupts Pic2 */␊
213␉␉␊
214␉␉startprog( kernelEntry, bootArgs );␊
215␉}␊
216␉else {␊
217␉␉startprog( kernelEntry, bootArgsPreLion );␊
218␉}␊
219␉␊
220␉// Not reached␊
221␉return 0;␊
222}␊
223␊
224␊
225//==========================================================================␊
226// LoadKernelCache - Try to load Kernel Cache.␊
227// return the length of the loaded cache file or -1 on error␊
228long LoadKernelCache(void **binary) {␊
229␉char␉␉kernelCacheFile[512];␊
230␉char␉␉kernelCachePath[512];␊
231␉const char␉*val;␊
232␉int␉␉ len;␊
233␉long␉␉flags, time, cachetime, kerneltime, exttime, ret=-1;␊
234 unsigned long adler32;␊
235␊
236␉// Determine the name of the Kernel Cache␊
237␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
238␉␉if (val[0] == '\\')␊
239␉␉{␊
240␉␉␉len--;␊
241␉␉␉val++;␊
242␉␉}␊
243␉␉strlcpy(kernelCacheFile, val, len + 1);␊
244␉}␊
245␉else {␊
246␉␉// Lion prelink kernel cache file␊
247␉␉if (checkOSVersion("10.7")) {␊
248␉␉␉sprintf(kernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
249␉␉}␊
250␉␉// Snow Leopard prelink kernel cache file␊
251␉␉else if (checkOSVersion("10.6")) {␊
252␉␉␉sprintf(kernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386)␊
253␉␉␉␉␉? "i386" : "x86_64");␊
254␉␉␉int lnam = strlen(kernelCacheFile) + 9; //with adler32␊
255␊
256␉␉␉char* name;␊
257␉␉␉long prev_time = 0;␊
258␊
259␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
260␊
261␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
262␉␉␉{␊
263␉␉␉␉if (((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time␊
264␉␉␉␉␉&& strstr(name, kernelCacheFile) && (name[lnam] != '.'))␊
265␉␉␉␉{␊
266␉␉␉␉␉sprintf(kernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
267␉␉␉␉␉prev_time = time;␊
268␉␉␉␉}␊
269␉␉␉}␊
270␉␉}␊
271␉␉else {␊
272␉␉␉// Reset cache name.␊
273␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
274␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
275␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
276␉␉␉sprintf(kernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
277␉␉}␊
278␉}␊
279␊
280␉// kernelCacheFile must start with a /␊
281␉if (kernelCacheFile[0] != '/') {␊
282␉␉char *str = strdup(kernelCacheFile);␊
283␉␉if (str == NULL)␊
284␉␉␉return -1;␊
285␉␉sprintf(kernelCacheFile, "/%s", str);␊
286␉␉free(str);␊
287␉}␊
288␊
289␉// Check if the kernel cache file exists␊
290␉ret = -1;␊
291␊
292␉// If boot from a boot helper partition check the kernel cache file on it␊
293␉if (gBootVolume->flags & kBVFlagBooter) {␊
294␉␉sprintf(kernelCachePath, "com.apple.boot.P%s", kernelCacheFile);␊
295␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
296␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
297␉␉{␊
298␉␉␉sprintf(kernelCachePath, "com.apple.boot.R%s", kernelCacheFile);␊
299␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
300␉␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
301␉␉␉{␊
302␉␉␉␉sprintf(kernelCachePath, "com.apple.boot.S%s", kernelCacheFile);␊
303␉␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
304␉␉␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
305␉␉␉␉␉ret = -1;␊
306␉␉␉}␊
307␉␉}␊
308␉}␊
309␉// If not found, use the original kernel cache path.␊
310␉if (ret == -1) {␊
311␉␉strcpy(kernelCachePath, kernelCacheFile);␊
312␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
313␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
314␉␉␉ret = -1;␊
315␉}␊
316␊
317␉// Exit if kernel cache file wasn't found␊
318␉if (ret == -1) {␊
319␉␉verbose("No Kernel Cache File '%s' found\n", kernelCacheFile);␊
320␉␉return -1;␊
321␉}␊
322␊
323␉// Check if the kernel cache file is more recent (mtime)␊
324␉// than the kernel file or the S/L/E directory␊
325␉ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
326␉// Check if the kernel file is more recent than the cache file␊
327␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeFlat)␊
328␉␉&& (kerneltime > cachetime)) {␊
329␉␉verbose("Kernel file (%s) is more recent than KernelCache (%s), ignoring KernelCache\n",␊
330␉␉␉␉bootInfo->bootFile, kernelCacheFile);␊
331␉␉return -1;␊
332␉}␊
333␊
334␉ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
335␉// Check if the S/L/E directory time is more recent than the cache file␊
336␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
337␉␉&& (exttime > cachetime)) {␊
338␉␉verbose("/System/Library/Extensions is more recent than KernelCache (%s), ignoring KernelCache\n",␊
339␉␉␉␉kernelCacheFile);␊
340␉␉return -1;␊
341␉}␊
342␊
343␉// Since the kernel cache file exists and is the most recent try to load it␊
344␉verbose("Loading kernel cache %s\n", kernelCachePath);␊
345␊
346␉if (checkOSVersion("10.7")) {␊
347␉␉ret = LoadThinFatFile(kernelCachePath, binary);␊
348␉} else {␊
349␉␉ret = LoadFile(kernelCachePath);␊
350␉␉*binary = (void *)kLoadAddr;␊
351␉}␊
352␉return ret; // ret contain the length of the binary␊
353}␊
354␊
355//==========================================================================␊
356// This is the entrypoint from real-mode which functions exactly as it did␊
357// before. Multiboot does its own runtime initialization, does some of its␊
358// own things, and then calls common_boot.␊
359void boot(int biosdev)␊
360{␊
361␉initialize_runtime();␊
362␉// Enable A20 gate before accessing memory above 1Mb.␊
363␉enableA20();␊
364␉common_boot(biosdev);␊
365}␊
366␊
367//==========================================================================␊
368// The 'main' function for the booter. Called by boot0 when booting␊
369// from a block device, or by the network booter.␊
370//␊
371// arguments:␊
372//␉ biosdev - Value passed from boot1/NBP to specify the device␊
373//␉␉␉ that the booter was loaded from.␊
374//␊
375// If biosdev is kBIOSDevNetwork, then this function will return if␊
376// booting was unsuccessful. This allows the PXE firmware to try the␊
377// next boot device on its list.␊
378void common_boot(int biosdev)␊
379{␊
380␉bool␉ ␉␉quiet;␊
381␉bool␉ ␉␉firstRun = true;␊
382␉bool␉ ␉␉instantMenu;␊
383␉bool␉ ␉␉rescanPrompt;␊
384␉int␉␉␉␉status;␊
385␉unsigned int␉allowBVFlags = kBVFlagSystemVolume | kBVFlagForeignBoot;␊
386␉unsigned int␉denyBVFlags = kBVFlagEFISystem;␊
387␉␊
388␉// Set reminder to unload the PXE base code. Neglect to unload␊
389␉// the base code will result in a hang or kernel panic.␊
390␉gUnloadPXEOnExit = true;␊
391␉␊
392␉// Record the device that the booter was loaded from.␊
393␉gBIOSDev = biosdev & kBIOSDevMask;␊
394␉␊
395␉// Initialize boot info structure.␊
396␉initKernBootStruct();␊
397␉␊
398␉initBooterLog();␊
399␉␊
400␉// Setup VGA text mode.␊
401␉// Not sure if it is safe to call setVideoMode() before the␊
402␉// config table has been loaded. Call video_mode() instead.␊
403#if DEBUG␊
404␉printf("before video_mode\n");␊
405#endif␊
406␉video_mode( 2 ); // 80x25 mono text mode.␊
407#if DEBUG␊
408␉printf("after video_mode\n");␊
409#endif␊
410␉␊
411␉// Scan and record the system's hardware information.␊
412␉scan_platform();␊
413␉␊
414␉// First get info for boot volume.␊
415␉scanBootVolumes(gBIOSDev, 0);␊
416␉bvChain = getBVChainForBIOSDev(gBIOSDev);␊
417␉setBootGlobals(bvChain);␊
418␉␊
419␉// Load boot.plist config file␊
420␉status = loadChameleonConfig(&bootInfo->chameleonConfig);␊
421␉␊
422␉if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->chameleonConfig) && quiet) {␊
423␉␉gBootMode |= kBootModeQuiet;␊
424␉}␊
425␉␊
426␉// Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
427␉if (getBoolForKey(kInstantMenuKey, &instantMenu, &bootInfo->chameleonConfig) && instantMenu) {␊
428␉␉firstRun = false;␊
429␉}␊
430␉␊
431␉// Loading preboot ramdisk if exists.␊
432␉loadPrebootRAMDisk();␊
433␉␊
434␉// Disable rescan option by default␊
435␉gEnableCDROMRescan = false;␊
436␉␊
437␉// Enable it with Rescan=y in system config␊
438␉if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->chameleonConfig)␊
439␉␉&& gEnableCDROMRescan) {␊
440␉␉gEnableCDROMRescan = true;␊
441␉}␊
442␉␊
443␉// Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
444␉rescanPrompt = false;␊
445␉if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->chameleonConfig)␊
446␉␉&& rescanPrompt && biosDevIsCDROM(gBIOSDev))␊
447␉{␊
448␉␉gEnableCDROMRescan = promptForRescanOption();␊
449␉}␊
450␉␊
451␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
452␉if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->chameleonConfig)␊
453␉␉&& gScanSingleDrive) {␊
454␉␉gScanSingleDrive = true;␊
455␉}␊
456␉␊
457␉// Create a list of partitions on device(s).␊
458␉if (gScanSingleDrive) {␊
459␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
460␉} else {␊
461␉␉scanDisks(gBIOSDev, &bvCount);␊
462␉}␊
463␉␊
464␉// Create a separated bvr chain using the specified filters.␊
465␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
466␉␊
467␉gBootVolume = selectBootVolume(bvChain);␊
468␉␊
469␉// Intialize module system ␊
470␉init_module_system();␊
471␉␉␊
472#if DEBUG␊
473␉printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
474␉␉␉ gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
475␉printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
476␉␉␉ gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
477␉getchar();␊
478#endif␊
479␉␊
480␉useGUI = true;␊
481␉// Override useGUI default␊
482␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->chameleonConfig);␊
483␉if (useGUI && initGUI())␊
484␉{␊
485␉␉// initGUI() returned with an error, disabling GUI.␊
486␉␉useGUI = false;␊
487␉}␊
488␉␊
489␉setBootGlobals(bvChain);␊
490␉␊
491␉// Parse args, load and start kernel.␊
492␉while (1)␊
493␉{␊
494␉␉bool␉␉tryresume, tryresumedefault, forceresume;␊
495␉␉bool␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
496␉␉const char␉*val;␊
497␉␉int␉␉␉len, ret = -1;␊
498␉␉long␉␉flags, sleeptime, time;␊
499␉␉void␉␉*binary = (void *)kLoadAddr;␊
500␉␉␊
501␉␉// additional variable for testing alternate kernel image locations on boot helper partitions.␊
502␉␉char bootFile[512];␊
503␉␉char␉␉bootFilePath[512];␊
504␉␉␊
505␉␉// Initialize globals.␊
506␉␉sysConfigValid = false;␊
507␉␉gErrors␉␉ = false;␊
508␉␉␊
509␉␉status = getBootOptions(firstRun);␊
510␉␉firstRun = false;␊
511␉␉if (status == -1) continue;␊
512␉␉ ␊
513␉␉status = processBootOptions();␊
514␉␉// Status == 1 means to chainboot␊
515␉␉if ( status ==␉1 ) break;␊
516␉␉// Status == -1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
517␉␉if ( status == -1 )␊
518␉␉{␊
519␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
520␉␉␉if (gBootVolume == NULL)␊
521␉␉␉{␊
522␉␉␉␉freeFilteredBVChain(bvChain);␊
523␉␉␉␉␊
524␉␉␉␉if (gEnableCDROMRescan)␊
525␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
526␉␉␉␉␊
527␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
528␉␉␉␉setBootGlobals(bvChain);␊
529␉␉␉␉setupDeviceList(&bootInfo->themeConfig);␊
530␉␉␉}␊
531␉␉␉continue;␊
532␉␉}␊
533␉␉␊
534␉␉// Other status (e.g. 0) means that we should proceed with boot.␊
535␉␉␊
536␉␉// Turn off any GUI elements␊
537␉␉if ( bootArgs->Video.v_display == GRAPHICS_MODE )␊
538␉␉{␊
539␉␉␉gui.devicelist.draw = false;␊
540␉␉␉gui.bootprompt.draw = false;␊
541␉␉␉gui.menu.draw = false;␊
542␉␉␉gui.infobox.draw = false;␊
543␉␉␉gui.logo.draw = false;␊
544␉␉␉drawBackground();␊
545␉␉␉updateVRAM();␊
546␉␉}␊
547␉␉␊
548␉␉// Find out which version mac os we're booting.␊
549␉␉getOSVersion();␊
550␉␉␊
551␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
552␉␉␉archCpuType = CPU_TYPE_X86_64;␊
553␉␉} else {␊
554␉␉␉archCpuType = CPU_TYPE_I386;␊
555␉␉}␊
556␉␉␊
557␉␉if (getValueForKey(karch, &val, &len, &bootInfo->chameleonConfig)) {␊
558␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
559␉␉␉␉archCpuType = CPU_TYPE_I386;␊
560␉␉␉}␊
561␉␉}␊
562␉␉␊
563␉␉if (getValueForKey(kKernelArchKey, &val, &len, &bootInfo->chameleonConfig)) {␊
564␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
565␉␉␉␉archCpuType = CPU_TYPE_I386;␊
566␉␉␉}␊
567␉␉}␊
568␉␉␊
569␉␉// Notify modules that we are attempting to boot␊
570␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
571␉␉␊
572␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->chameleonConfig)) {␊
573␉␉␉tryresume = true;␊
574␉␉␉tryresumedefault = true;␊
575␉␉} else {␊
576␉␉␉tryresumedefault = false;␊
577␉␉}␊
578␉␉␊
579␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->chameleonConfig)) {␊
580␉␉␉forceresume = false;␊
581␉␉}␊
582␉␉␊
583␉␉if (forceresume) {␊
584␉␉␉tryresume = true;␊
585␉␉␉tryresumedefault = false;␊
586␉␉}␊
587␉␉␊
588␉␉while (tryresume) {␊
589␉␉␉const char *tmp;␊
590␉␉␉BVRef bvr;␊
591␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->chameleonConfig))␊
592␉␉␉␉val = "/private/var/vm/sleepimage";␊
593␉␉␉␊
594␉␉␉// Do this first to be sure that root volume is mounted␊
595␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
596␉␉␉␊
597␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
598␉␉␉␉break;␊
599␉␉␉␊
600␉␉␉// Can't check if it was hibernation Wake=y is required␊
601␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
602␉␉␉␉break;␊
603␉␉␉␊
604␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
605␉␉␉␉break;␊
606␉␉␉␊
607␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
608#if DEBUG␉␊
609␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",␊
610␉␉␉␉␉␉bvr->modTime-sleeptime);␊
611#endif␉␉␉␉ ␊
612␉␉␉␉break;␊
613␉␉␉}␊
614␉␉␉␊
615␉␉␉HibernateBoot((char *)val);␊
616␉␉␉break;␊
617␉␉}␊
618␉␉␊
619␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
620␊
621␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
622␉␉getBoolForKey(kUseKernelCache, &useKernelCache, &bootInfo->chameleonConfig);␊
623␊
624␉␉if (useKernelCache) do {␊
625␊
626␉␉␉// If boot from boot helper partitions and OS is Lion use prelink kernel.␊
627␉␉␉// We need to find a solution to load extra mkext with a prelink kernel.␊
628␉␉␉if (gBootVolume->flags & kBVFlagBooter && checkOSVersion("10.7")) {␊
629␉␉␉␉verbose("Booting from Lion RAID volume so forcing to use KernelCache\n");␊
630␉␉␉␉useKernelCache = true;␊
631␉␉␉␉break;␊
632␉␉␉}␊
633␊
634␉␉␉if ((gBootMode & kBootModeSafe) == 1) {␊
635␉␉␉␉verbose("Booting in 'Boot Safe' mode, KernelCache will not be used\n");␊
636␉␉␉␉useKernelCache = false;␊
637␉␉␉␉break;␊
638␉␉␉}␊
639␉␉␉if (gOverrideKernel) {␊
640␉␉␉␉verbose("Using a non default kernel (%s), KernelCache will not be used\n",␊
641␉␉␉␉␉␉bootInfo->bootFile);␊
642␉␉␉␉useKernelCache = false;␊
643␉␉␉␉break;␊
644␉␉␉}␊
645␉␉␉if (gMKextName[0] != 0) {␊
646␉␉␉␉verbose("Using a specific MKext Cache (%s), KernelCache will not be used\n",␊
647␉␉␉␉␉␉gMKextName);␊
648␉␉␉␉useKernelCache = false;␊
649␉␉␉␉break;␊
650␉␉␉}␊
651␉␉␉if (gBootFileType != kBlockDeviceType)␊
652␉␉␉␉useKernelCache = false;␊
653␊
654␉␉} while(0);␊
655␊
656␉␉do {␊
657␉␉␉if (useKernelCache) {␊
658␉␉␉␉ret = LoadKernelCache(&binary);␊
659␉␉␉␉if (ret >= 0)␊
660␉␉␉␉␉break;␊
661␉␉␉}␊
662␊
663␉␉␉bool bootFileWithDevice = false;␊
664␉␉␉// Check if bootFile start with a device ex: bt(0,0)/Extra/mach_kernel␊
665␉␉␉if (strncmp(bootInfo->bootFile,"bt(",3) == 0 ||␊
666␉␉␉␉strncmp(bootInfo->bootFile,"hd(",3) == 0 ||␊
667␉␉␉␉strncmp(bootInfo->bootFile,"rd(",3) == 0)␊
668␉␉␉␉bootFileWithDevice = true;␊
669␊
670␉␉␉// bootFile must start with a / if it not start with a device name␊
671␉␉␉if (!bootFileWithDevice && (bootInfo->bootFile)[0] != '/')␊
672␉␉␉␉sprintf(bootFile, "/%s", bootInfo->bootFile); // append a leading /␊
673␉␉␉else␊
674␉␉␉␉strcpy(bootFile, bootInfo->bootFile);␊
675␊
676␉␉␉// Try to load kernel image from alternate locations on boot helper partitions.␊
677␉␉␉ret = -1;␊
678␉␉␉if ((gBootVolume->flags & kBVFlagBooter) && !bootFileWithDevice) {␊
679␉␉␉␉sprintf(bootFilePath, "com.apple.boot.P%s", bootFile);␊
680␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
681␉␉␉␉if (ret == -1)␊
682␉␉␉␉{␊
683␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.R%s", bootFile);␊
684␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
685␉␉␉␉␉if (ret == -1)␊
686␉␉␉␉␉{␊
687␉␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.S%s", bootFile);␊
688␉␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
689␉␉␉␉␉}␊
690␉␉␉␉}␊
691␉␉␉}␊
692␉␉␉if (ret == -1) {␊
693␉␉␉␉// No alternate location found, using the original kernel image path.␊
694␉␉␉␉strcpy(bootFilePath, bootFile);␊
695␉␉␉}␊
696␉␉␉␊
697␉␉␉verbose("Loading kernel %s\n", bootFilePath);␊
698␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
699␉␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
700␉␉␉{␊
701␉␉␉␉archCpuType = CPU_TYPE_I386;␊
702␉␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
703␉␉␉}␊
704␉␉} while (0);␊
705␉␉␊
706␉␉clearActivityIndicator();␊
707␉␉␊
708#if DEBUG␊
709␉␉printf("Pausing...");␊
710␉␉sleep(8);␊
711#endif␊
712␉␉␊
713␉␉if (ret <= 0) {␊
714␉␉␉printf("Can't find %s\n", bootFile);␊
715␉␉␉sleep(1);␊
716␉␉␉␊
717␉␉␉if (gBootFileType == kNetworkDeviceType) {␊
718␉␉␉␉// Return control back to PXE. Don't unload PXE base code.␊
719␉␉␉␉gUnloadPXEOnExit = false;␊
720␉␉␉␉break;␊
721␉␉␉}␊
722␉␉␉pause();␊
723␊
724␉␉} else {␊
725␉␉␉/* Won't return if successful. */␊
726␉␉␉ret = ExecKernel(binary);␊
727␉␉}␊
728␉}␊
729␉␊
730␉// chainboot␊
731␉if (status == 1) {␊
732␉␉// if we are already in graphics-mode,␊
733␉␉if (getVideoMode() == GRAPHICS_MODE) {␊
734␉␉␉setVideoMode(VGA_TEXT_MODE, 0); // switch back to text mode.␊
735␉␉}␊
736␉}␊
737␉␊
738␉if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
739␉␉nbpUnloadBaseCode();␊
740␉}␊
741}␊
742␊
743/*!␊
744␉Selects a new BIOS device, taking care to update the global state appropriately.␊
745 */␊
746/*␊
747static void selectBiosDevice(void)␊
748{␊
749␉struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
750␉CacheReset();␊
751␉diskFreeMap(oldMap);␊
752␉oldMap = NULL;␊
753␉␊
754␉int dev = selectAlternateBootDevice(gBIOSDev);␊
755␉␊
756␉BVRef bvchain = scanBootVolumes(dev, 0);␊
757␉BVRef bootVol = selectBootVolume(bvchain);␊
758␉gBootVolume = bootVol;␊
759␉setRootVolume(bootVol);␊
760␉gBIOSDev = dev;␊
761}␊
762*/␊
763␊
764bool checkOSVersion(const char * version) ␊
765{␊
766␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1])␊
767␉␉␉&& (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
768}␊
769␊
770bool getOSVersion()␊
771{␊
772␉bool␉␉␉valid = false;␊
773␉const char␉␉*val;␊
774␉int␉␉␉␉len;␊
775␉config_file_t␉systemVersion;␊
776␉␊
777␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
778␉{␊
779␉␉valid = true;␊
780␉}␊
781␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
782␉{␊
783␉␉valid = true;␊
784␉}␊
785␉␊
786␉if (valid)␊
787␉{␊
788␉␉if␉(getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
789␉␉{␊
790␉␉␉// getValueForKey uses const char for val␊
791␉␉␉// so copy it and trim␊
792␉␉␉*gMacOSVersion = '\0';␊
793␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊
794␉␉}␊
795␉␉else␊
796␉␉␉valid = false;␊
797␉}␊
798␉␊
799␉return valid;␊
800}␊
801␊
802#define BASE 65521L /* largest prime smaller than 65536 */␊
803#define NMAX 5000␊
804// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
805␊
806#define DO1(buf, i)␉{s1 += buf[i]; s2 += s1;}␊
807#define DO2(buf, i)␉DO1(buf, i); DO1(buf, i + 1);␊
808#define DO4(buf, i)␉DO2(buf, i); DO2(buf, i + 2);␊
809#define DO8(buf, i)␉DO4(buf, i); DO4(buf, i + 4);␊
810#define DO16(buf)␉DO8(buf, 0); DO8(buf, 8);␊
811␊
812unsigned long Adler32(unsigned char *buf, long len)␊
813{␊
814␉unsigned long s1 = 1; // adler & 0xffff;␊
815␉unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
816␉unsigned long result;␊
817␉int k;␊
818␉␊
819␉while (len > 0) {␊
820␉␉k = len < NMAX ? len : NMAX;␊
821␉␉len -= k;␊
822␉␉while (k >= 16) {␊
823␉␉␉DO16(buf);␊
824␉␉␉buf += 16;␊
825␉␉␉k -= 16;␊
826␉␉}␊
827␉␉if (k != 0) do {␊
828␉␉␉s1 += *buf++;␊
829␉␉␉s2 += s1;␊
830␉␉} while (--k);␊
831␉␉s1 %= BASE;␊
832␉␉s2 %= BASE;␊
833␉}␊
834␉result = (s2 << 16) | s1;␊
835␉return OSSwapHostToBigInt32(result);␊
836}␊
837

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