Chameleon

Chameleon Svn Source Tree

Root/branches/ErmaC/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␊
212␉␉startprog( kernelEntry, bootArgs );␊
213␉}␊
214␉else {␊
215␉␉startprog( kernelEntry, bootArgsPreLion );␊
216␉}␊
217␊
218␉// Not reached␊
219␉return 0;␊
220}␊
221␊
222␊
223//==========================================================================␊
224// LoadKernelCache - Try to load Kernel Cache.␊
225// return the length of the loaded cache file or -1 on error␊
226long LoadKernelCache(void **binary) {␊
227␉char␉␉kernelCacheFile[512];␊
228␉char␉␉kernelCachePath[512];␊
229␉const char␉*val;␊
230␉int␉␉ len;␊
231␉long␉␉flags, time, cachetime, kerneltime, exttime, ret=-1;␊
232 unsigned long adler32;␊
233␊
234␉// Determine the name of the Kernel Cache␊
235␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
236␉␉if (val[0] == '\\')␊
237␉␉{␊
238␉␉␉len--;␊
239␉␉␉val++;␊
240␉␉}␊
241␉␉strlcpy(kernelCacheFile, val, len + 1);␊
242␉}␊
243␉else {␊
244␉␉// Lion prelink kernel cache file␊
245␉␉if (checkOSVersion("10.7")) {␊
246␉␉␉sprintf(kernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
247␉␉}␊
248␉␉// Snow Leopard prelink kernel cache file␊
249␉␉else if (checkOSVersion("10.6")) {␊
250␉␉␉sprintf(kernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386)␊
251␉␉␉␉␉? "i386" : "x86_64");␊
252␉␉␉int lnam = strlen(kernelCacheFile) + 9; //with adler32␊
253␊
254␉␉␉char* name;␊
255␉␉␉long prev_time = 0;␊
256␊
257␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
258␊
259␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
260␉␉␉{␊
261␉␉␉␉if (((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time␊
262␉␉␉␉␉&& strstr(name, kernelCacheFile) && (name[lnam] != '.'))␊
263␉␉␉␉{␊
264␉␉␉␉␉sprintf(kernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
265␉␉␉␉␉prev_time = time;␊
266␉␉␉␉}␊
267␉␉␉}␊
268␉␉}␊
269␉␉else {␊
270␉␉␉// Reset cache name.␊
271␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
272␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
273␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
274␉␉␉sprintf(kernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
275␉␉}␊
276␉}␊
277␊
278␉// kernelCacheFile must start with a /␊
279␉if (kernelCacheFile[0] != '/') {␊
280␉␉char *str = strdup(kernelCacheFile);␊
281␉␉if (str == NULL)␊
282␉␉␉return -1;␊
283␉␉sprintf(kernelCacheFile, "/%s", str);␊
284␉␉free(str);␊
285␉}␊
286␊
287␉// Check if the kernel cache file exists␊
288␉ret = -1;␊
289␊
290␉// If boot from a boot helper partition check the kernel cache file on it␊
291␉if (gBootVolume->flags & kBVFlagBooter) {␊
292␉␉sprintf(kernelCachePath, "com.apple.boot.P%s", kernelCacheFile);␊
293␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
294␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
295␉␉{␊
296␉␉␉sprintf(kernelCachePath, "com.apple.boot.R%s", kernelCacheFile);␊
297␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
298␉␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
299␉␉␉{␊
300␉␉␉␉sprintf(kernelCachePath, "com.apple.boot.S%s", kernelCacheFile);␊
301␉␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
302␉␉␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
303␉␉␉␉␉ret = -1;␊
304␉␉␉}␊
305␉␉}␊
306␉}␊
307␉// If not found, use the original kernel cache path.␊
308␉if (ret == -1) {␊
309␉␉strcpy(kernelCachePath, kernelCacheFile);␊
310␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
311␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
312␉␉␉ret = -1;␊
313␉}␊
314␊
315␉// Exit if kernel cache file wasn't found␊
316␉if (ret == -1) {␊
317␉␉verbose("No Kernel Cache File '%s' found\n", kernelCacheFile);␊
318␉␉return -1;␊
319␉}␊
320␊
321␉// Check if the kernel cache file is more recent (mtime)␊
322␉// than the kernel file or the S/L/E directory␊
323␉ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
324␉// Check if the kernel file is more recent than the cache file␊
325␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeFlat)␊
326␉␉&& (kerneltime > cachetime)) {␊
327␉␉verbose("Kernel file (%s) is more recent than KernelCache (%s), ignoring KernelCache\n",␊
328␉␉␉␉bootInfo->bootFile, kernelCacheFile);␊
329␉␉return -1;␊
330␉}␊
331␊
332␉ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
333␉// Check if the S/L/E directory time is more recent than the cache file␊
334␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
335␉␉&& (exttime > cachetime)) {␊
336␉␉verbose("/System/Library/Extensions is more recent than KernelCache (%s), ignoring KernelCache\n",␊
337␉␉␉␉kernelCacheFile);␊
338␉␉return -1;␊
339␉}␊
340␊
341␉// Since the kernel cache file exists and is the most recent try to load it␊
342␉verbose("Loading kernel cache %s\n", kernelCachePath);␊
343␊
344␉if (checkOSVersion("10.7")) {␊
345␉␉ret = LoadThinFatFile(kernelCachePath, binary);␊
346␉} else {␊
347␉␉ret = LoadFile(kernelCachePath);␊
348␉␉*binary = (void *)kLoadAddr;␊
349␉}␊
350␉return ret; // ret contain the length of the binary␊
351}␊
352␊
353//==========================================================================␊
354// This is the entrypoint from real-mode which functions exactly as it did␊
355// before. Multiboot does its own runtime initialization, does some of its␊
356// own things, and then calls common_boot.␊
357void boot(int biosdev)␊
358{␊
359␉initialize_runtime();␊
360␉// Enable A20 gate before accessing memory above 1Mb.␊
361␉enableA20();␊
362␉common_boot(biosdev);␊
363}␊
364␊
365//==========================================================================␊
366// The 'main' function for the booter. Called by boot0 when booting␊
367// from a block device, or by the network booter.␊
368//␊
369// arguments:␊
370//␉ biosdev - Value passed from boot1/NBP to specify the device␊
371//␉␉␉ that the booter was loaded from.␊
372//␊
373// If biosdev is kBIOSDevNetwork, then this function will return if␊
374// booting was unsuccessful. This allows the PXE firmware to try the␊
375// next boot device on its list.␊
376void common_boot(int biosdev)␊
377{␊
378␉bool␉ ␉␉quiet;␊
379␉bool␉ ␉␉firstRun = true;␊
380␉bool␉ ␉␉instantMenu;␊
381␉bool␉ ␉␉rescanPrompt;␊
382␉int␉␉␉␉status;␊
383␉unsigned int␉allowBVFlags = kBVFlagSystemVolume | kBVFlagForeignBoot;␊
384␉unsigned int␉denyBVFlags = kBVFlagEFISystem;␊
385␉␊
386␉// Set reminder to unload the PXE base code. Neglect to unload␊
387␉// the base code will result in a hang or kernel panic.␊
388␉gUnloadPXEOnExit = true;␊
389␉␊
390␉// Record the device that the booter was loaded from.␊
391␉gBIOSDev = biosdev & kBIOSDevMask;␊
392␉␊
393␉// Initialize boot info structure.␊
394␉initKernBootStruct();␊
395␉␊
396␉initBooterLog();␊
397␉␊
398␉// Setup VGA text mode.␊
399␉// Not sure if it is safe to call setVideoMode() before the␊
400␉// config table has been loaded. Call video_mode() instead.␊
401#if DEBUG␊
402␉printf("before video_mode\n");␊
403#endif␊
404␉video_mode( 2 ); // 80x25 mono text mode.␊
405#if DEBUG␊
406␉printf("after video_mode\n");␊
407#endif␊
408␉␊
409␉// Scan and record the system's hardware information.␊
410␉scan_platform();␊
411␉␊
412␉// First get info for boot volume.␊
413␉scanBootVolumes(gBIOSDev, 0);␊
414␉bvChain = getBVChainForBIOSDev(gBIOSDev);␊
415␉setBootGlobals(bvChain);␊
416␉␊
417␉// Load boot.plist config file␊
418␉status = loadChameleonConfig(&bootInfo->chameleonConfig);␊
419␉␊
420␉if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->chameleonConfig) && quiet) {␊
421␉␉gBootMode |= kBootModeQuiet;␊
422␉}␊
423␉␊
424␉// Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
425␉if (getBoolForKey(kInstantMenuKey, &instantMenu, &bootInfo->chameleonConfig) && instantMenu) {␊
426␉␉firstRun = false;␊
427␉}␊
428␉␊
429␉// Loading preboot ramdisk if exists.␊
430␉loadPrebootRAMDisk();␊
431␉␊
432␉// Disable rescan option by default␊
433␉gEnableCDROMRescan = false;␊
434␉␊
435␉// Enable it with Rescan=y in system config␊
436␉if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->chameleonConfig)␊
437␉␉&& gEnableCDROMRescan) {␊
438␉␉gEnableCDROMRescan = true;␊
439␉}␊
440␉␊
441␉// Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
442␉rescanPrompt = false;␊
443␉if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->chameleonConfig)␊
444␉␉&& rescanPrompt && biosDevIsCDROM(gBIOSDev))␊
445␉{␊
446␉␉gEnableCDROMRescan = promptForRescanOption();␊
447␉}␊
448␉␊
449␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
450␉if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->chameleonConfig)␊
451␉␉&& gScanSingleDrive) {␊
452␉␉gScanSingleDrive = true;␊
453␉}␊
454␉␊
455␉// Create a list of partitions on device(s).␊
456␉if (gScanSingleDrive) {␊
457␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
458␉} else {␊
459␉␉scanDisks(gBIOSDev, &bvCount);␊
460␉}␊
461␉␊
462␉// Create a separated bvr chain using the specified filters.␊
463␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
464␉␊
465␉gBootVolume = selectBootVolume(bvChain);␊
466␉␊
467␉// Intialize module system ␊
468␉init_module_system();␊
469␊
470#if DEBUG␊
471␉printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
472␉␉␉ gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
473␉printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
474␉␉␉ gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
475␉getchar();␊
476#endif␊
477␊
478␉useGUI = true;␊
479␉// Override useGUI default␊
480␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->chameleonConfig);␊
481␉if (useGUI && initGUI())␊
482␉{␊
483␉␉// initGUI() returned with an error, disabling GUI.␊
484␉␉useGUI = false;␊
485␉}␊
486␉␊
487␉setBootGlobals(bvChain);␊
488␉␊
489␉// Parse args, load and start kernel.␊
490␉while (1)␊
491␉{␊
492␉␉bool␉␉tryresume, tryresumedefault, forceresume;␊
493␉␉bool␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
494␉␉const char␉*val;␊
495␉␉int␉␉␉len, ret = -1;␊
496␉␉long␉␉flags, sleeptime, time;␊
497␉␉void␉␉*binary = (void *)kLoadAddr;␊
498␉␉␊
499␉␉// additional variable for testing alternate kernel image locations on boot helper partitions.␊
500␉␉char bootFile[sizeof(bootInfo->bootFile)];␊
501␉␉char␉␉bootFilePath[512];␊
502␉␉␊
503␉␉// Initialize globals.␊
504␉␉sysConfigValid = false;␊
505␉␉gErrors␉␉ = false;␊
506␉␉␊
507␉␉status = getBootOptions(firstRun);␊
508␉␉firstRun = false;␊
509␉␉if (status == -1) continue;␊
510␉␉ ␊
511␉␉status = processBootOptions();␊
512␉␉// Status == 1 means to chainboot␊
513␉␉if ( status ==␉1 ) break;␊
514␉␉// Status == -1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
515␉␉if ( status == -1 )␊
516␉␉{␊
517␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
518␉␉␉if (gBootVolume == NULL)␊
519␉␉␉{␊
520␉␉␉␉freeFilteredBVChain(bvChain);␊
521␉␉␉␉␊
522␉␉␉␉if (gEnableCDROMRescan)␊
523␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
524␉␉␉␉␊
525␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
526␉␉␉␉setBootGlobals(bvChain);␊
527␉␉␉␉setupDeviceList(&bootInfo->themeConfig);␊
528␉␉␉}␊
529␉␉␉continue;␊
530␉␉}␊
531␉␉␊
532␉␉// Other status (e.g. 0) means that we should proceed with boot.␊
533␉␉␊
534␉␉// Turn off any GUI elements␊
535␉␉if ( bootArgs->Video.v_display == GRAPHICS_MODE )␊
536␉␉{␊
537␉␉␉gui.devicelist.draw = false;␊
538␉␉␉gui.bootprompt.draw = false;␊
539␉␉␉gui.menu.draw = false;␊
540␉␉␉gui.infobox.draw = false;␊
541␉␉␉gui.logo.draw = false;␊
542␉␉␉drawBackground();␊
543␉␉␉updateVRAM();␊
544␉␉}␊
545␉␉␊
546␉␉// Find out which version mac os we're booting.␊
547␉␉getOSVersion();␊
548␊
549␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
550␉␉␉archCpuType = CPU_TYPE_X86_64;␊
551␉␉} else {␊
552␉␉␉archCpuType = CPU_TYPE_I386;␊
553␉␉}␊
554␊
555␉␉if (getValueForKey(karch, &val, &len, &bootInfo->chameleonConfig)) {␊
556␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
557␉␉␉␉archCpuType = CPU_TYPE_I386;␊
558␉␉␉}␊
559␉␉}␊
560␉␉␊
561␉␉if (getValueForKey(kKernelArchKey, &val, &len, &bootInfo->chameleonConfig)) {␊
562␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
563␉␉␉␉archCpuType = CPU_TYPE_I386;␊
564␉␉␉}␊
565␉␉}␊
566␊
567␉␉// Notify modules that we are attempting to boot␊
568␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
569␊
570␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->chameleonConfig)) {␊
571␉␉␉tryresume = true;␊
572␉␉␉tryresumedefault = true;␊
573␉␉} else {␊
574␉␉␉tryresumedefault = false;␊
575␉␉}␊
576␊
577␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->chameleonConfig)) {␊
578␉␉␉forceresume = false;␊
579␉␉}␊
580␉␉␊
581␉␉if (forceresume) {␊
582␉␉␉tryresume = true;␊
583␉␉␉tryresumedefault = false;␊
584␉␉}␊
585␉␉␊
586␉␉while (tryresume) {␊
587␉␉␉const char *tmp;␊
588␉␉␉BVRef bvr;␊
589␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->chameleonConfig))␊
590␉␉␉␉val = "/private/var/vm/sleepimage";␊
591␉␉␉␊
592␉␉␉// Do this first to be sure that root volume is mounted␊
593␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
594␊
595␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
596␉␉␉␉break;␊
597␉␉␉␊
598␉␉␉// Can't check if it was hibernation Wake=y is required␊
599␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
600␉␉␉␉break;␊
601␉␉␉␊
602␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
603␉␉␉␉break;␊
604␉␉␉␊
605␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
606#if DEBUG␉␊
607␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",␊
608␉␉␉␉␉␉bvr->modTime-sleeptime);␊
609#endif␉␉␉␉ ␊
610␉␉␉␉break;␊
611␉␉␉}␊
612␊
613␉␉␉HibernateBoot((char *)val);␊
614␉␉␉break;␊
615␉␉}␊
616␉␉␊
617␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
618␊
619␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
620␉␉getBoolForKey(kUseKernelCache, &useKernelCache, &bootInfo->chameleonConfig);␊
621␊
622␉␉if (useKernelCache) do {␊
623␊
624␉␉␉// If boot from boot helper partitions and OS is Lion use prelink kernel.␊
625␉␉␉// We need to find a solution to load extra mkext with a prelink kernel.␊
626␉␉␉if (gBootVolume->flags & kBVFlagBooter && checkOSVersion("10.7")) {␊
627␉␉␉␉verbose("Booting from Lion RAID volume so forcing to use KernelCache\n");␊
628␉␉␉␉useKernelCache = true;␊
629␉␉␉␉break;␊
630␉␉␉}␊
631␊
632␉␉␉if ((gBootMode & kBootModeSafe) == 1) {␊
633␉␉␉␉verbose("Booting in 'Boot Safe' mode, KernelCache will not be used\n");␊
634␉␉␉␉useKernelCache = false;␊
635␉␉␉␉break;␊
636␉␉␉}␊
637␉␉␉if (gOverrideKernel) {␊
638␉␉␉␉verbose("Using a non default kernel (%s), KernelCache will not be used\n",␊
639␉␉␉␉␉␉bootInfo->bootFile);␊
640␉␉␉␉useKernelCache = false;␊
641␉␉␉␉break;␊
642␉␉␉}␊
643␉␉␉if (gMKextName[0] != 0) {␊
644␉␉␉␉verbose("Using a specific MKext Cache (%s), KernelCache will not be used\n",␊
645␉␉␉␉␉␉gMKextName);␊
646␉␉␉␉useKernelCache = false;␊
647␉␉␉␉break;␊
648␉␉␉}␊
649␉␉␉if (gBootFileType != kBlockDeviceType)␊
650␉␉␉␉useKernelCache = false;␊
651␊
652␉␉} while(0);␊
653␊
654␉␉do {␊
655␉␉␉if (useKernelCache) {␊
656␉␉␉␉ret = LoadKernelCache(&binary);␊
657␉␉␉␉if (ret >= 0)␊
658␉␉␉␉␉break;␊
659␉␉␉}␊
660␊
661␉␉␉bool bootFileWithDevice = false;␊
662␉␉␉// Check if bootFile start with a device ex: bt(0,0)/Extra/mach_kernel␊
663␉␉␉if (strncmp(bootInfo->bootFile,"bt(",3) == 0 ||␊
664␉␉␉␉strncmp(bootInfo->bootFile,"hd(",3) == 0 ||␊
665␉␉␉␉strncmp(bootInfo->bootFile,"rd(",3) == 0)␊
666␉␉␉␉bootFileWithDevice = true;␊
667␊
668␉␉␉// bootFile must start with a / if it not start with a device name␊
669␉␉␉if (!bootFileWithDevice && (bootInfo->bootFile)[0] != '/')␊
670␉␉␉␉sprintf(bootFile, "/%s", bootInfo->bootFile); // append a leading /␊
671␉␉␉else␊
672␉␉␉␉strlcpy(bootFile, bootInfo->bootFile, sizeof(bootFile));␊
673␊
674␉␉␉// Try to load kernel image from alternate locations on boot helper partitions.␊
675␉␉␉ret = -1;␊
676␉␉␉if ((gBootVolume->flags & kBVFlagBooter) && !bootFileWithDevice) {␊
677␉␉␉␉sprintf(bootFilePath, "com.apple.boot.P%s", bootFile);␊
678␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
679␉␉␉␉if (ret == -1)␊
680␉␉␉␉{␊
681␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.R%s", bootFile);␊
682␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
683␉␉␉␉␉if (ret == -1)␊
684␉␉␉␉␉{␊
685␉␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.S%s", bootFile);␊
686␉␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
687␉␉␉␉␉}␊
688␉␉␉␉}␊
689␉␉␉}␊
690␉␉␉if (ret == -1) {␊
691␉␉␉␉// No alternate location found, using the original kernel image path.␊
692␉␉␉␉strlcpy(bootFilePath, bootFile,sizeof(bootFilePath));␊
693␉␉␉}␊
694␉␉␉␊
695␉␉␉verbose("Loading kernel %s\n", bootFilePath);␊
696␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
697␉␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
698␉␉␉{␊
699␉␉␉␉archCpuType = CPU_TYPE_I386;␊
700␉␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
701␉␉␉}␊
702␉␉} while (0);␊
703␉␉␊
704␉␉clearActivityIndicator();␊
705␉␉␊
706#if DEBUG␊
707␉␉printf("Pausing...");␊
708␉␉sleep(8);␊
709#endif␊
710␉␉␊
711␉␉if (ret <= 0) {␊
712␉␉␉printf("Can't find %s\n", bootFile);␊
713␉␉␉sleep(1);␊
714␉␉␉␊
715␉␉␉if (gBootFileType == kNetworkDeviceType) {␊
716␉␉␉␉// Return control back to PXE. Don't unload PXE base code.␊
717␉␉␉␉gUnloadPXEOnExit = false;␊
718␉␉␉␉break;␊
719␉␉␉}␊
720␉␉␉pause();␊
721␊
722␉␉} else {␊
723␉␉␉/* Won't return if successful. */␊
724␉␉␉ret = ExecKernel(binary);␊
725␉␉}␊
726␉}␊
727␉␊
728␉// chainboot␊
729␉if (status == 1) {␊
730␉␉// if we are already in graphics-mode,␊
731␉␉if (getVideoMode() == GRAPHICS_MODE) {␊
732␉␉␉setVideoMode(VGA_TEXT_MODE, 0); // switch back to text mode.␊
733␉␉}␊
734␉}␊
735␉␊
736␉if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
737␉␉nbpUnloadBaseCode();␊
738␉}␊
739}␊
740␊
741/*!␊
742␉Selects a new BIOS device, taking care to update the global state appropriately.␊
743 */␊
744/*␊
745static void selectBiosDevice(void)␊
746{␊
747␉struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
748␉CacheReset();␊
749␉diskFreeMap(oldMap);␊
750␉oldMap = NULL;␊
751␉␊
752␉int dev = selectAlternateBootDevice(gBIOSDev);␊
753␉␊
754␉BVRef bvchain = scanBootVolumes(dev, 0);␊
755␉BVRef bootVol = selectBootVolume(bvchain);␊
756␉gBootVolume = bootVol;␊
757␉setRootVolume(bootVol);␊
758␉gBIOSDev = dev;␊
759}␊
760*/␊
761␊
762bool checkOSVersion(const char * version) ␊
763{␊
764␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1])␊
765␉␉␉&& (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
766}␊
767␊
768bool getOSVersion()␊
769{␊
770␉bool␉␉␉valid = false;␊
771␉const char␉␉*val;␊
772␉int␉␉␉␉len;␊
773␉config_file_t␉systemVersion;␊
774␉␊
775␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
776␉{␊
777␉␉valid = true;␊
778␉}␊
779␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
780␉{␊
781␉␉valid = true;␊
782␉}␊
783␊
784␉if (valid)␊
785␉{␊
786␉␉if␉(getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
787␉␉{␊
788␉␉␉// getValueForKey uses const char for val␊
789␉␉␉// so copy it and trim␊
790␉␉␉*gMacOSVersion = '\0';␊
791␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊
792␉␉}␊
793␉␉else␊
794␉␉␉valid = false;␊
795␉}␊
796␊
797␉return valid;␊
798}␊
799␊
800#define BASE 65521L /* largest prime smaller than 65536 */␊
801#define NMAX 5000␊
802// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
803␊
804#define DO1(buf, i)␉{s1 += buf[i]; s2 += s1;}␊
805#define DO2(buf, i)␉DO1(buf, i); DO1(buf, i + 1);␊
806#define DO4(buf, i)␉DO2(buf, i); DO2(buf, i + 2);␊
807#define DO8(buf, i)␉DO4(buf, i); DO4(buf, i + 4);␊
808#define DO16(buf)␉DO8(buf, 0); DO8(buf, 8);␊
809␊
810unsigned long Adler32(unsigned char *buf, long len)␊
811{␊
812␉unsigned long s1 = 1; // adler & 0xffff;␊
813␉unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
814␉unsigned long result;␊
815␉int k;␊
816␉␊
817␉while (len > 0) {␊
818␉␉k = len < NMAX ? len : NMAX;␊
819␉␉len -= k;␊
820␉␉while (k >= 16) {␊
821␉␉␉DO16(buf);␊
822␉␉␉buf += 16;␊
823␉␉␉k -= 16;␊
824␉␉}␊
825␉␉if (k != 0) do {␊
826␉␉␉s1 += *buf++;␊
827␉␉␉s2 += s1;␊
828␉␉} while (--k);␊
829␉␉s1 %= BASE;␊
830␉␉s2 %= BASE;␊
831␉}␊
832␉result = (s2 << 16) | s1;␊
833␉return OSSwapHostToBigInt32(result);␊
834}␊
835

Archive Download this file

Revision: 1452