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1/*␊
2 * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊
3 *␊
4 * @APPLE_LICENSE_HEADER_START@␊
5 * ␊
6 * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊
7 * Reserved. This file contains Original Code and/or Modifications of␊
8 * Original Code as defined in and that are subject to the Apple Public␊
9 * Source License Version 2.0 (the "License").␉You may not use this file␊
10 * except in compliance with the License. Please obtain a copy of the␊
11 * License at http://www.apple.com/publicsource and read it before using␊
12 * this file.␊
13 * ␊
14 * The Original Code and all software distributed under the License are␊
15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊
19 * License for the specific language governing rights and limitations␊
20 * under the License.␊
21 * ␊
22 * @APPLE_LICENSE_HEADER_END@␊
23 */␊
24␊
25/* ␊
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[ROOT_DEVICE_SIZE];␊
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 void␉␉␉␉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␉verbose("Boot Args: %s\n", bootArgs->CommandLine);␊
168␊
169␉// Cleanup the PXE base code.␊
170␉␊
171␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
172␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
173␉␉{␊
174␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
175␉␉␉sleep(2);␊
176␉␉}␊
177␉}␊
178␉␊
179␉bool dummyVal;␊
180␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->chameleonConfig) && dummyVal) {␊
181␉␉showTextBuffer(msgbuf, strlen(msgbuf));␊
182␉}␊
183␉␊
184␉usb_loop();␊
185␊
186␉// If we were in text mode, switch to graphics mode.␊
187␉// This will draw the boot graphics unless we are in␊
188␉// verbose mode.␊
189␉if (gVerboseMode)␊
190␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
191␉else␊
192␉␉drawBootGraphics();␊
193␉␊
194␉setupBooterLog();␊
195␉␊
196␉finalizeBootStruct();␊
197␉␊
198␉// Jump to kernel's entry point. There's no going back now.␊
199␉if ((checkOSVersion("10.7")) || (checkOSVersion("10.8"))) {␊
200␊
201␉␉// Notify modules that the kernel is about to be started␊
202␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␊
203␊
204␉␉// Masking out so that Lion doesn't doublefault␊
205␊
206␉␉startprog( kernelEntry, bootArgs );␊
207␉}␊
208␉else {␊
209␉␉// Notify modules that the kernel is about to be started␊
210␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␊
211␊
212␉␉startprog( kernelEntry, bootArgsPreLion );␊
213␉}␊
214␊
215␉// Not reached␊
216␉return 0;␊
217}␊
218␊
219␊
220//==========================================================================␊
221// LoadKernelCache - Try to load Kernel Cache.␊
222// return the length of the loaded cache file or -1 on error␊
223long LoadKernelCache(const char* cacheFile, void **binary) {␊
224␉char␉␉kernelCacheFile[512];␊
225␉char␉␉kernelCachePath[512];␊
226␉long␉␉flags, time, cachetime, kerneltime, exttime, ret=-1;␊
227 unsigned long adler32;␊
228␊
229␉// Use specify kernel cache file if not empty␊
230␉if (cacheFile[0] != 0)␊
231␉␉strlcpy(kernelCacheFile, cacheFile, sizeof(kernelCacheFile));␊
232␉else {␊
233␉␉// Mountain Lion and Lion prelink kernel cache file␊
234␉␉if ((checkOSVersion("10.7")) || (checkOSVersion("10.8"))) {␊
235␉␉␉sprintf(kernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
236 }␊
237␉␉// Snow Leopard prelink kernel cache file␊
238␉␉else if (checkOSVersion("10.6")) {␊
239␉␉␉sprintf(kernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386)␊
240␉␉␉␉␉? "i386" : "x86_64");␊
241␉␉␉int lnam = strlen(kernelCacheFile) + 9; //with adler32␊
242␊
243␉␉␉char* name;␊
244␉␉␉long prev_time = 0;␊
245␊
246␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
247␊
248␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
249␉␉␉{␊
250␉␉␉␉if (((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time␊
251␉␉␉␉␉&& strstr(name, kernelCacheFile) && (name[lnam] != '.'))␊
252␉␉␉␉{␊
253␉␉␉␉␉sprintf(kernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
254␉␉␉␉␉prev_time = time;␊
255␉␉␉␉}␊
256␉␉␉}␊
257␉␉}␊
258␉␉else {␊
259␉␉␉// Reset cache name.␊
260␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
261␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
262␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
263␉␉␉sprintf(kernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
264␉␉}␊
265␉}␊
266␊
267␉// kernelCacheFile must start with a /␊
268␉if (kernelCacheFile[0] != '/') {␊
269␉␉char *str = strdup(kernelCacheFile);␊
270␉␉if (str == NULL)␊
271␉␉␉return -1;␊
272␉␉sprintf(kernelCacheFile, "/%s", str);␊
273␉␉free(str);␊
274␉}␊
275␊
276␉// Check if the kernel cache file exists␊
277␉ret = -1;␊
278␊
279␉// If boot from a boot helper partition check the kernel cache file on it␊
280␉if (gBootVolume->flags & kBVFlagBooter) {␊
281␉␉sprintf(kernelCachePath, "com.apple.boot.P%s", kernelCacheFile);␊
282␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
283␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
284␉␉{␊
285␉␉␉sprintf(kernelCachePath, "com.apple.boot.R%s", kernelCacheFile);␊
286␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
287␉␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
288␉␉␉{␊
289␉␉␉␉sprintf(kernelCachePath, "com.apple.boot.S%s", kernelCacheFile);␊
290␉␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
291␉␉␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
292␉␉␉␉␉ret = -1;␊
293␉␉␉}␊
294␉␉}␊
295␉}␊
296␉// If not found, use the original kernel cache path.␊
297␉if (ret == -1) {␊
298␉␉strcpy(kernelCachePath, kernelCacheFile);␊
299␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
300␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
301␉␉␉ret = -1;␊
302␉}␊
303␊
304␉// Exit if kernel cache file wasn't found␊
305␉if (ret == -1) {␊
306␉␉verbose("No Kernel Cache File '%s' found\n", kernelCacheFile);␊
307␉␉return -1;␊
308␉}␊
309␊
310␉// Check if the kernel cache file is more recent (mtime)␊
311␉// than the kernel file or the S/L/E directory␊
312␉ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
313␉// Check if the kernel file is more recent than the cache file␊
314␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeFlat)␊
315␉␉&& (kerneltime > cachetime)) {␊
316␉␉verbose("Kernel file (%s) is more recent than KernelCache (%s), ignoring KernelCache\n",␊
317␉␉␉␉bootInfo->bootFile, kernelCacheFile);␊
318␉␉return -1;␊
319␉}␊
320␊
321␉ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
322␉// Check if the S/L/E directory time is more recent than the cache file␊
323␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
324␉␉&& (exttime > cachetime)) {␊
325␉␉verbose("/System/Library/Extensions is more recent than KernelCache (%s), ignoring KernelCache\n",␊
326␉␉␉␉kernelCacheFile);␊
327␉␉return -1;␊
328␉}␊
329␊
330␉// Since the kernel cache file exists and is the most recent try to load it␊
331␉verbose("Loading kernel cache %s\n", kernelCachePath);␊
332␊
333␉if ((checkOSVersion("10.7")) || (checkOSVersion("10.8"))) {␊
334␉␉ret = LoadThinFatFile(kernelCachePath, binary);␊
335␉} else {␊
336␉␉ret = LoadFile(kernelCachePath);␊
337␉␉*binary = (void *)kLoadAddr;␊
338␉}␊
339␉return ret; // ret contain the length of the binary␊
340}␊
341␊
342//==========================================================================␊
343// This is the entrypoint from real-mode which functions exactly as it did␊
344// before. Multiboot does its own runtime initialization, does some of its␊
345// own things, and then calls common_boot.␊
346void boot(int biosdev)␊
347{␊
348␉initialize_runtime();␊
349␉// Enable A20 gate before accessing memory above 1Mb.␊
350␉enableA20();␊
351␉common_boot(biosdev);␊
352}␊
353␊
354//==========================================================================␊
355// The 'main' function for the booter. Called by boot0 when booting␊
356// from a block device, or by the network booter.␊
357//␊
358// arguments:␊
359//␉ biosdev - Value passed from boot1/NBP to specify the device␊
360//␉␉␉ that the booter was loaded from.␊
361//␊
362// If biosdev is kBIOSDevNetwork, then this function will return if␊
363// booting was unsuccessful. This allows the PXE firmware to try the␊
364// next boot device on its list.␊
365void common_boot(int biosdev)␊
366{␊
367␉bool␉ ␉␉quiet;␊
368␉bool␉ ␉␉firstRun = true;␊
369␉bool␉ ␉␉instantMenu;␊
370␉bool␉ ␉␉rescanPrompt;␊
371␉int␉␉␉␉status;␊
372␉unsigned int␉allowBVFlags = kBVFlagSystemVolume | kBVFlagForeignBoot;␊
373␉unsigned int␉denyBVFlags = kBVFlagEFISystem;␊
374␉␊
375␉// Set reminder to unload the PXE base code. Neglect to unload␊
376␉// the base code will result in a hang or kernel panic.␊
377␉gUnloadPXEOnExit = true;␊
378␉␊
379␉// Record the device that the booter was loaded from.␊
380␉gBIOSDev = biosdev & kBIOSDevMask;␊
381␉␊
382␉// Initialize boot info structure.␊
383␉initKernBootStruct();␊
384␉␊
385␉initBooterLog();␊
386␉␊
387␉// Setup VGA text mode.␊
388␉// Not sure if it is safe to call setVideoMode() before the␊
389␉// config table has been loaded. Call video_mode() instead.␊
390#if DEBUG␊
391␉printf("before video_mode\n");␊
392#endif␊
393␉video_mode( 2 ); // 80x25 mono text mode.␊
394#if DEBUG␊
395␉printf("after video_mode\n");␊
396#endif␊
397␉␊
398␉// Scan and record the system's hardware information.␊
399␉scan_platform();␊
400␉␊
401␉// First get info for boot volume.␊
402␉scanBootVolumes(gBIOSDev, 0);␊
403␉bvChain = getBVChainForBIOSDev(gBIOSDev);␊
404␉setBootGlobals(bvChain);␊
405␉␊
406␉// Load boot.plist config file␊
407␉status = loadChameleonConfig(&bootInfo->chameleonConfig);␊
408␉␊
409␉if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->chameleonConfig) && quiet) {␊
410␉␉gBootMode |= kBootModeQuiet;␊
411␉}␊
412␉␊
413␉// Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
414␉if (getBoolForKey(kInstantMenuKey, &instantMenu, &bootInfo->chameleonConfig) && instantMenu) {␊
415␉␉firstRun = false;␊
416␉}␊
417␉␊
418␉// Loading preboot ramdisk if exists.␊
419␉loadPrebootRAMDisk();␊
420␉␊
421␉// Disable rescan option by default␊
422␉gEnableCDROMRescan = false;␊
423␉␊
424␉// Enable it with Rescan=y in system config␊
425␉if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->chameleonConfig)␊
426␉␉&& gEnableCDROMRescan) {␊
427␉␉gEnableCDROMRescan = true;␊
428␉}␊
429␉␊
430␉// Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
431␉rescanPrompt = false;␊
432␉if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->chameleonConfig)␊
433␉␉&& rescanPrompt && biosDevIsCDROM(gBIOSDev))␊
434␉{␊
435␉␉gEnableCDROMRescan = promptForRescanOption();␊
436␉}␊
437␉␊
438␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
439␉if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->chameleonConfig)␊
440␉␉&& gScanSingleDrive) {␊
441␉␉gScanSingleDrive = true;␊
442␉}␊
443␉␊
444␉// Create a list of partitions on device(s).␊
445␉if (gScanSingleDrive) {␊
446␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
447␉} else {␊
448␉␉scanDisks(gBIOSDev, &bvCount);␊
449␉}␊
450␉␊
451␉// Create a separated bvr chain using the specified filters.␊
452␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
453␉␊
454␉gBootVolume = selectBootVolume(bvChain);␊
455␉␊
456␉// Intialize module system ␊
457␉init_module_system();␊
458␊
459#if DEBUG␊
460␉printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
461␉␉␉ gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
462␉printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
463␉␉␉ gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
464␉getchar();␊
465#endif␊
466␊
467␉useGUI = true;␊
468␉// Override useGUI default␊
469␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->chameleonConfig);␊
470␉if (useGUI && initGUI())␊
471␉{␊
472␉␉// initGUI() returned with an error, disabling GUI.␊
473␉␉useGUI = false;␊
474␉}␊
475␉␊
476␉setBootGlobals(bvChain);␊
477␉␊
478␉// Parse args, load and start kernel.␊
479␉while (1)␊
480␉{␊
481␉␉bool␉␉tryresume, tryresumedefault, forceresume;␊
482␉␉bool␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
483␉␉const char␉*val;␊
484␉␉int␉␉␉len, ret = -1;␊
485␉␉long␉␉flags, sleeptime, time;␊
486␉␉void␉␉*binary = (void *)kLoadAddr;␊
487␉␉␊
488␉␉char bootFile[sizeof(bootInfo->bootFile)];␊
489␉␉char␉␉bootFilePath[512];␊
490␉␉char␉␉kernelCacheFile[512];␊
491␊
492␉␉// Initialize globals.␊
493␉␉sysConfigValid = false;␊
494␉␉gErrors␉␉ = false;␊
495␉␉␊
496␉␉status = getBootOptions(firstRun);␊
497␉␉firstRun = false;␊
498␉␉if (status == -1) continue;␊
499␉␉ ␊
500␉␉status = processBootOptions();␊
501␉␉// Status == 1 means to chainboot␊
502␉␉if ( status ==␉1 ) break;␊
503␉␉// Status == -1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
504␉␉if ( status == -1 )␊
505␉␉{␊
506␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
507␉␉␉if (gBootVolume == NULL)␊
508␉␉␉{␊
509␉␉␉␉freeFilteredBVChain(bvChain);␊
510␉␉␉␉␊
511␉␉␉␉if (gEnableCDROMRescan)␊
512␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
513␉␉␉␉␊
514␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
515␉␉␉␉setBootGlobals(bvChain);␊
516␉␉␉␉setupDeviceList(&bootInfo->themeConfig);␊
517␉␉␉}␊
518␉␉␉continue;␊
519␉␉}␊
520␉␉␊
521␉␉// Other status (e.g. 0) means that we should proceed with boot.␊
522␉␉␊
523␉␉// Turn off any GUI elements␊
524␉␉if ( bootArgs->Video.v_display == GRAPHICS_MODE )␊
525␉␉{␊
526␉␉␉gui.devicelist.draw = false;␊
527␉␉␉gui.bootprompt.draw = false;␊
528␉␉␉gui.menu.draw = false;␊
529␉␉␉gui.infobox.draw = false;␊
530␉␉␉gui.logo.draw = false;␊
531␉␉␉drawBackground();␊
532␉␉␉updateVRAM();␊
533␉␉}␊
534␉␉␊
535␉␉// Find out which version mac os we're booting.␊
536␉␉getOSVersion();␊
537␊
538␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
539␉␉␉archCpuType = CPU_TYPE_X86_64;␊
540␉␉} else {␊
541␉␉␉archCpuType = CPU_TYPE_I386;␊
542␉␉}␊
543␊
544␉␉if (getValueForKey(karch, &val, &len, &bootInfo->chameleonConfig)) {␊
545␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
546␉␉␉␉archCpuType = CPU_TYPE_I386;␊
547␉␉␉}␊
548␉␉}␊
549␉␉␊
550␉␉if (getValueForKey(kKernelArchKey, &val, &len, &bootInfo->chameleonConfig)) {␊
551␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
552␉␉␉␉archCpuType = CPU_TYPE_I386;␊
553␉␉␉}␊
554␉␉}␊
555␊
556␉␉// Notify modules that we are attempting to boot␊
557␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
558␊
559␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->chameleonConfig)) {␊
560␉␉␉tryresume = true;␊
561␉␉␉tryresumedefault = true;␊
562␉␉} else {␊
563␉␉␉tryresumedefault = false;␊
564␉␉}␊
565␊
566␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->chameleonConfig)) {␊
567␉␉␉forceresume = false;␊
568␉␉}␊
569␉␉␊
570␉␉if (forceresume) {␊
571␉␉␉tryresume = true;␊
572␉␉␉tryresumedefault = false;␊
573␉␉}␊
574␉␉␊
575␉␉while (tryresume) {␊
576␉␉␉const char *tmp;␊
577␉␉␉BVRef bvr;␊
578␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->chameleonConfig))␊
579␉␉␉␉val = "/private/var/vm/sleepimage";␊
580␉␉␉␊
581␉␉␉// Do this first to be sure that root volume is mounted␊
582␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
583␊
584␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
585␉␉␉␉break;␊
586␉␉␉␊
587␉␉␉// Can't check if it was hibernation Wake=y is required␊
588␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
589␉␉␉␉break;␊
590␉␉␉␊
591␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
592␉␉␉␉break;␊
593␉␉␉␊
594␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
595#if DEBUG␉␊
596␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",␊
597␉␉␉␉␉␉bvr->modTime-sleeptime);␊
598#endif␉␉␉␉ ␊
599␉␉␉␉break;␊
600␉␉␉}␊
601␊
602␉␉␉HibernateBoot((char *)val);␊
603␉␉␉break;␊
604␉␉}␊
605␉␉␊
606␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
607␊
608␉␉// If boot from boot helper partitions and OS is Mountain Lion or Lion use prelink kernel.␊
609␉␉// We need to find a solution to load extra mkext with a prelink kernel.␊
610␉␉if (gBootVolume->flags & kBVFlagBooter && ((checkOSVersion("10.7")) || (checkOSVersion("10.8"))))␊
611␉␉␉useKernelCache = true;␊
612␉␉else␊
613␉␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
614␊
615␉␉getBoolForKey(kUseKernelCache, &useKernelCache, &bootInfo->chameleonConfig);␊
616␊
617␉␉if (useKernelCache) do {␊
618␊
619␉␉␉// Determine the name of the Kernel Cache␊
620␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
621␉␉␉␉if (val[0] == '\\')␊
622␉␉␉␉{␊
623␉␉␉␉␉len--;␊
624␉␉␉␉␉val++;␊
625␉␉␉␉}␊
626␉␉␉␉strlcpy(kernelCacheFile, val, len + 1);␊
627␉␉␉} else {␊
628␉␉␉␉kernelCacheFile[0] = 0; // Use default kernel cache file␊
629␉␉␉}␊
630␊
631␉␉␉if (gOverrideKernel && kernelCacheFile[0] == 0) {␊
632␉␉␉␉verbose("Using a non default kernel (%s) without specifying 'Kernel Cache' path, KernelCache will not be used\n",␊
633␉␉␉␉␉␉bootInfo->bootFile);␊
634␉␉␉␉useKernelCache = false;␊
635␉␉␉␉break;␊
636␉␉␉}␊
637␉␉␉if (gMKextName[0] != 0) {␊
638␉␉␉␉verbose("Using a specific MKext Cache (%s), KernelCache will not be used\n",␊
639␉␉␉␉␉␉gMKextName);␊
640␉␉␉␉useKernelCache = false;␊
641␉␉␉␉break;␊
642␉␉␉}␊
643␉␉␉if (gBootFileType != kBlockDeviceType)␊
644␉␉␉␉useKernelCache = false;␊
645␊
646␉␉} while(0);␊
647␊
648␉␉do {␊
649␉␉␉if (useKernelCache) {␊
650␉␉␉␉ret = LoadKernelCache(kernelCacheFile, &binary);␊
651␉␉␉␉if (ret >= 0)␊
652␉␉␉␉␉break;␊
653␉␉␉}␊
654␊
655␉␉␉bool bootFileWithDevice = false;␊
656␉␉␉// Check if bootFile start with a device ex: bt(0,0)/Extra/mach_kernel␊
657␉␉␉if (strncmp(bootInfo->bootFile,"bt(",3) == 0 ||␊
658␉␉␉␉strncmp(bootInfo->bootFile,"hd(",3) == 0 ||␊
659␉␉␉␉strncmp(bootInfo->bootFile,"rd(",3) == 0)␊
660␉␉␉␉bootFileWithDevice = true;␊
661␊
662␉␉␉// bootFile must start with a / if it not start with a device name␊
663␉␉␉if (!bootFileWithDevice && (bootInfo->bootFile)[0] != '/')␊
664␉␉␉␉sprintf(bootFile, "/%s", bootInfo->bootFile); // append a leading /␊
665␉␉␉else␊
666␉␉␉␉strlcpy(bootFile, bootInfo->bootFile, sizeof(bootFile));␊
667␊
668␉␉␉// Try to load kernel image from alternate locations on boot helper partitions.␊
669␉␉␉ret = -1;␊
670␉␉␉if ((gBootVolume->flags & kBVFlagBooter) && !bootFileWithDevice) {␊
671␉␉␉␉sprintf(bootFilePath, "com.apple.boot.P%s", bootFile);␊
672␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
673␉␉␉␉if (ret == -1)␊
674␉␉␉␉{␊
675␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.R%s", bootFile);␊
676␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
677␉␉␉␉␉if (ret == -1)␊
678␉␉␉␉␉{␊
679␉␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.S%s", bootFile);␊
680␉␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
681␉␉␉␉␉}␊
682␉␉␉␉}␊
683␉␉␉}␊
684␉␉␉if (ret == -1) {␊
685␉␉␉␉// No alternate location found, using the original kernel image path.␊
686␉␉␉␉strlcpy(bootFilePath, bootFile,sizeof(bootFilePath));␊
687␉␉␉}␊
688␉␉␉␊
689␉␉␉verbose("Loading kernel %s\n", bootFilePath);␊
690␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
691␉␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
692␉␉␉{␊
693␉␉␉␉archCpuType = CPU_TYPE_I386;␊
694␉␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
695␉␉␉}␊
696␉␉} while (0);␊
697␉␉␊
698␉␉clearActivityIndicator();␊
699␉␉␊
700#if DEBUG␊
701␉␉printf("Pausing...");␊
702␉␉sleep(8);␊
703#endif␊
704␉␉␊
705␉␉if (ret <= 0) {␊
706␉␉␉printf("Can't find %s\n", bootFile);␊
707␉␉␉sleep(1);␊
708␉␉␉␊
709␉␉␉if (gBootFileType == kNetworkDeviceType) {␊
710␉␉␉␉// Return control back to PXE. Don't unload PXE base code.␊
711␉␉␉␉gUnloadPXEOnExit = false;␊
712␉␉␉␉break;␊
713␉␉␉}␊
714␉␉␉pause();␊
715␊
716␉␉} else {␊
717␉␉␉/* Won't return if successful. */␊
718␉␉␉ret = ExecKernel(binary);␊
719␉␉}␊
720␉}␊
721␉␊
722␉// chainboot␊
723␉if (status == 1) {␊
724␉␉// if we are already in graphics-mode,␊
725␉␉if (getVideoMode() == GRAPHICS_MODE) {␊
726␉␉␉setVideoMode(VGA_TEXT_MODE, 0); // switch back to text mode.␊
727␉␉}␊
728␉}␊
729␉␊
730␉if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
731␉␉nbpUnloadBaseCode();␊
732␉}␊
733}␊
734␊
735/*!␊
736␉Selects a new BIOS device, taking care to update the global state appropriately.␊
737 */␊
738/*␊
739static void selectBiosDevice(void)␊
740{␊
741␉struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
742␉CacheReset();␊
743␉diskFreeMap(oldMap);␊
744␉oldMap = NULL;␊
745␉␊
746␉int dev = selectAlternateBootDevice(gBIOSDev);␊
747␉␊
748␉BVRef bvchain = scanBootVolumes(dev, 0);␊
749␉BVRef bootVol = selectBootVolume(bvchain);␊
750␉gBootVolume = bootVol;␊
751␉setRootVolume(bootVol);␊
752␉gBIOSDev = dev;␊
753}␊
754*/␊
755␊
756bool checkOSVersion(const char * version) ␊
757{␊
758␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1])␊
759␉␉␉&& (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
760}␊
761␊
762static void getOSVersion()␊
763{␊
764␉strlcpy(gMacOSVersion, gBootVolume->OSVersion, sizeof(gMacOSVersion));␊
765}␊
766␊
767#define BASE 65521L /* largest prime smaller than 65536 */␊
768#define NMAX 5000␊
769// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
770␊
771#define DO1(buf, i)␉{s1 += buf[i]; s2 += s1;}␊
772#define DO2(buf, i)␉DO1(buf, i); DO1(buf, i + 1);␊
773#define DO4(buf, i)␉DO2(buf, i); DO2(buf, i + 2);␊
774#define DO8(buf, i)␉DO4(buf, i); DO4(buf, i + 4);␊
775#define DO16(buf)␉DO8(buf, 0); DO8(buf, 8);␊
776␊
777unsigned long Adler32(unsigned char *buf, long len)␊
778{␊
779␉unsigned long s1 = 1; // adler & 0xffff;␊
780␉unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
781␉unsigned long result;␊
782␉int k;␊
783␉␊
784␉while (len > 0) {␊
785␉␉k = len < NMAX ? len : NMAX;␊
786␉␉len -= k;␊
787␉␉while (k >= 16) {␊
788␉␉␉DO16(buf);␊
789␉␉␉buf += 16;␊
790␉␉␉k -= 16;␊
791␉␉}␊
792␉␉if (k != 0) do {␊
793␉␉␉s1 += *buf++;␊
794␉␉␉s2 += s1;␊
795␉␉} while (--k);␊
796␉␉s1 %= BASE;␊
797␉␉s2 %= BASE;␊
798␉}␊
799␉result = (s2 << 16) | s1;␊
800␉return OSSwapHostToBigInt32(result);␊
801}␊
802

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