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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 * INTEL CORPORATION PROPRIETARY INFORMATION␊
33 *␊
34 * This software is supplied under the terms of a license agreement or ␊
35 * nondisclosure agreement with Intel Corporation and may not be copied ␊
36 * nor disclosed except in accordance with the terms of that agreement.␊
37 *␊
38 *␉Copyright 1988, 1989 by Intel Corporation␊
39 *␊
40 *␊
41 * Copyright 1993 NeXT Computer, Inc.␊
42 * All rights reserved.␊
43 *␊
44 * Completely reworked by Sam Streeper (sam_s@NeXT.com)␊
45 * Reworked again by Curtis Galloway (galloway@NeXT.com)␊
46 */␊
47␊
48#include "boot.h"␊
49#include "bootstruct.h"␊
50#include "fake_efi.h"␊
51#include "sl.h"␊
52#include "libsa.h"␊
53#include "ramdisk.h"␊
54#include "gui.h"␊
55#include "platform.h"␊
56#include "modules.h"␊
57␊
58/*␊
59 * How long to wait (in seconds) to load the␊
60 * kernel after displaying the "boot:" prompt.␊
61 */␊
62#define kBootErrorTimeout 5␊
63␊
64bool␉␉gOverrideKernel, gEnableCDROMRescan, gScanSingleDrive, useGUI;␊
65static bool␉gUnloadPXEOnExit = false;␊
66␊
67static char␉gCacheNameAdler[64 + 256];␊
68char␉␉*gPlatformName = gCacheNameAdler;␊
69␊
70char␉␉gRootDevice[ROOT_DEVICE_SIZE];␊
71char␉␉gMKextName[512];␊
72char␉␉gMacOSVersion[8];␊
73int␉␉bvCount = 0, gDeviceCount = 0;␊
74//int␉␉menucount = 0;␊
75long␉␉gBootMode; /* defaults to 0 == kBootModeNormal */␊
76BVRef␉␉bvr, menuBVR, bvChain;␊
77␊
78static bool␉␉␉␉checkOSVersion(const char * version);␊
79static void␉␉␉␉getOSVersion();␊
80static unsigned long␉Adler32(unsigned char *buffer, long length);␊
81//static void␉␉␉selectBiosDevice(void);␊
82␊
83/** options.c **/␊
84extern char* msgbuf;␊
85void showTextBuffer(char *buf, int size);␊
86␊
87␊
88//==========================================================================␊
89// Zero the BSS.␊
90␊
91static void zeroBSS(void)␊
92{␊
93␉extern char bss_start __asm("section$start$__DATA$__bss");␊
94␉extern char bss_end __asm("section$end$__DATA$__bss");␊
95␉extern char common_start __asm("section$start$__DATA$__common");␊
96␉extern char common_end __asm("section$end$__DATA$__common");␊
97␊
98␉bzero(&bss_start, (&bss_end - &bss_start));␊
99␉bzero(&common_start, (&common_end - &common_start));␊
100}␊
101␊
102//==========================================================================␊
103// Malloc error function␊
104␊
105static void malloc_error(char *addr, size_t size, const char *file, int line)␊
106{␊
107␉stop("\nMemory allocation error! Addr: 0x%x, Size: 0x%x, File: %s, Line: %d\n",␊
108␉␉␉␉␉␉␉␉␉ (unsigned)addr, (unsigned)size, file, line);␊
109}␊
110␊
111//==========================================================================␊
112//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
113//␊
114void initialize_runtime(void)␊
115{␊
116␉zeroBSS();␊
117␉malloc_init(0, 0, 0, malloc_error);␊
118}␊
119␊
120//==========================================================================␊
121// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
122␊
123static int ExecKernel(void *binary)␊
124{␊
125␉int␉␉␉ret;␊
126␉entry_t␉␉kernelEntry;␊
127␊
128␉bootArgs->kaddr = bootArgs->ksize = 0;␊
129␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
130␊
131␉ret = DecodeKernel(binary,␊
132␉␉␉␉␉ &kernelEntry,␊
133␉␉␉␉␉ (char **) &bootArgs->kaddr,␊
134␉␉␉␉␉ (int *)&bootArgs->ksize );␊
135␊
136␉if ( ret != 0 )␊
137␉␉return ret;␊
138␊
139␉// Reserve space for boot args␊
140␉reserveKernBootStruct();␊
141␊
142␉// Notify modules that the kernel has been decoded␊
143␉execute_hook("DecodedKernel", (void*)binary, (void*)bootArgs->kaddr, (void*)bootArgs->ksize, NULL);␊
144␊
145␉setupFakeEfi();␊
146␊
147␉// Load boot drivers from the specifed root path.␊
148␉//if (!gHaveKernelCache)␊
149␉LoadDrivers("/");␊
150␊
151␉execute_hook("DriversLoaded", (void*)binary, NULL, NULL, NULL);␊
152␊
153␉clearActivityIndicator();␊
154␊
155␉if (gErrors) {␊
156␉␉printf("Errors encountered while starting up the computer.\n");␊
157␉␉printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
158␉␉sleep(kBootErrorTimeout);␊
159␉}␊
160␊
161␉md0Ramdisk();␊
162␊
163␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
164␉verbose("Boot Args: %s\n", bootArgs->CommandLine);␊
165␊
166␉// Cleanup the PXE base code.␊
167␊
168␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
169␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess ) {␊
170␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
171␉␉␉sleep(2);␊
172␉␉}␊
173␉}␊
174␊
175␉bool dummyVal;␊
176␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->chameleonConfig) && dummyVal) {␊
177␉␉showTextBuffer(msgbuf, strlen(msgbuf));␊
178␉}␊
179␊
180␉usb_loop();␊
181␊
182␉// If we were in text mode, switch to graphics mode.␊
183␉// This will draw the boot graphics unless we are in␊
184␉// verbose mode.␊
185␉if (gVerboseMode) {␊
186␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
187␉} else {␊
188␉␉drawBootGraphics();␊
189␉}␊
190␉setupBooterLog();␊
191␊
192␉finalizeBootStruct();␊
193␊
194␉// Jump to kernel's entry point. There's no going back now.␊
195␉if ((checkOSVersion("10.7")) || (checkOSVersion("10.8")) || (checkOSVersion("10.9")))␊
196␉{␊
197␊
198␉␉// Notify modules that the kernel is about to be started␊
199␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␊
200␊
201␉␉// Masking out so that Lion doesn't doublefault␊
202␊
203␉␉startprog( kernelEntry, bootArgs );␊
204␉} else {␊
205␉␉// Notify modules that the kernel is about to be started␊
206␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␊
207␊
208␉␉startprog( kernelEntry, bootArgsPreLion );␊
209␉}␊
210␊
211␉// Not reached␊
212␉return 0;␊
213}␊
214␊
215␊
216//==========================================================================␊
217// LoadKernelCache - Try to load Kernel Cache.␊
218// return the length of the loaded cache file or -1 on error␊
219long LoadKernelCache(const char* cacheFile, void **binary)␊
220{␊
221␉char␉␉kernelCacheFile[512];␊
222␉char␉␉kernelCachePath[512];␊
223␉long␉␉flags, time, cachetime, kerneltime, exttime, ret=-1;␊
224␉unsigned long adler32;␊
225␊
226␉if((gBootMode & kBootModeSafe) != 0) {␊
227␉␉verbose("Kernel Cache ignored.\n");␊
228␉␉return -1;␊
229␉}␊
230␊
231␉// Use specify kernel cache file if not empty␊
232␉if (cacheFile[0] != 0)␊
233␉{␊
234␉␉strlcpy(kernelCacheFile, cacheFile, sizeof(kernelCacheFile));␊
235␉}␊
236␉else␊
237␉{␊
238␉␉// Lion, Mountain Lion and Mavericks prelink kernel cache file␊
239␉␉if ((checkOSVersion("10.7")) || (checkOSVersion("10.8")) || (checkOSVersion("10.9")))␊
240␉␉{␊
241␉␉␉snprintf(kernelCacheFile, sizeof(kernelCacheFile), "%skernelcache", kDefaultCachePathSnow);␊
242␉␉}␊
243␉␉// Snow Leopard prelink kernel cache file␊
244␉␉else if (checkOSVersion("10.6")) {␊
245␉␉␉snprintf(kernelCacheFile, sizeof(kernelCacheFile), "kernelcache_%s",␊
246␉␉␉␉(archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");␊
247␉␉␉int lnam = strlen(kernelCacheFile) + 9; //with adler32␊
248␊
249␉␉␉char* name;␊
250␉␉␉long prev_time = 0;␊
251␊
252␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
253␉␉␉/* TODO: handle error? */␊
254␉␉␉if (cacheDir) {␊
255␉␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0) {␊
256␉␉␉␉␉if (((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time␊
257␉␉␉␉␉␉&& strstr(name, kernelCacheFile) && (name[lnam] != '.')) {␊
258␉␉␉␉␉␉snprintf(kernelCacheFile, sizeof(kernelCacheFile), "%s%s", kDefaultCachePathSnow, name);␊
259␉␉␉␉␉␉prev_time = time;␊
260␉␉␉␉␉}␊
261␉␉␉␉}␊
262␉␉␉}␊
263␉␉␉closedir(cacheDir);␊
264␉␉} else {␊
265␉␉␉// Reset cache name.␊
266␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
267␉␉␉snprintf(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64,␊
268␉␉␉␉"%s,%s",␊
269␉␉␉␉gRootDevice, bootInfo->bootFile);␊
270␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
271␉␉␉snprintf(kernelCacheFile, sizeof(kernelCacheFile), "%s.%08lX", kDefaultCachePathLeo, adler32);␊
272␉␉}␊
273␉}␊
274/* Issue: http://forge.voodooprojects.org/p/chameleon/issues/270/␊
275␉// kernelCacheFile must start with a /␊
276␉if (kernelCacheFile[0] != '/')␊
277␉{␊
278␉␉char *str = strdup(kernelCacheFile);␊
279␉␉if (str == NULL)␊
280␉␉{␊
281␉␉␉return -1;␊
282␉␉}␊
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␉␉snprintf(kernelCachePath, sizeof(kernelCachePath), "com.apple.boot.P%s", kernelCacheFile);␊
293␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
294␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
295␉␉␉snprintf(kernelCachePath, sizeof(kernelCachePath), "com.apple.boot.R%s", kernelCacheFile);␊
296␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
297␉␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
298␉␉␉␉snprintf(kernelCachePath, sizeof(kernelCachePath), "com.apple.boot.S%s", kernelCacheFile);␊
299␉␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
300␉␉␉␉if ((flags & kFileTypeMask) != kFileTypeFlat) {␊
301␉␉␉␉␉ret = -1;␊
302␉␉␉␉}␊
303␉␉␉}␊
304␉␉}␊
305␉}␊
306␉// If not found, use the original kernel cache path.␊
307␉if (ret == -1) {␊
308␉␉strlcpy(kernelCachePath, kernelCacheFile, sizeof(kernelCachePath));␊
309␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
310␉␉if ((flags & kFileTypeMask) != kFileTypeFlat) {␊
311␉␉␉ret = -1;␊
312␉␉}␊
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␉ret = LoadThinFatFile(kernelCachePath, binary);␊
345␉return ret; // ret contain the length of the binary␊
346}␊
347␊
348//==========================================================================␊
349// This is the entrypoint from real-mode which functions exactly as it did␊
350// before. Multiboot does its own runtime initialization, does some of its␊
351// own things, and then calls common_boot.␊
352void boot(int biosdev)␊
353{␊
354␉initialize_runtime();␊
355␉// Enable A20 gate before accessing memory above 1Mb.␊
356␉enableA20();␊
357␉common_boot(biosdev);␊
358}␊
359␊
360//==========================================================================␊
361// The 'main' function for the booter. Called by boot0 when booting␊
362// from a block device, or by the network booter.␊
363//␊
364// arguments:␊
365//␉ biosdev - Value passed from boot1/NBP to specify the device␊
366//␉␉␉ that the booter was loaded from.␊
367//␊
368// If biosdev is kBIOSDevNetwork, then this function will return if␊
369// booting was unsuccessful. This allows the PXE firmware to try the␊
370// next boot device on its list.␊
371void common_boot(int biosdev)␊
372{␊
373␉bool␉ ␉␉quiet;␊
374␉bool␉ ␉␉firstRun = true;␊
375␉bool␉ ␉␉instantMenu;␊
376␉bool␉ ␉␉rescanPrompt;␊
377␉int␉␉␉␉status;␊
378␉unsigned int␉allowBVFlags = kBVFlagSystemVolume | kBVFlagForeignBoot;␊
379␉unsigned int␉denyBVFlags = kBVFlagEFISystem;␊
380␊
381␉// Set reminder to unload the PXE base code. Neglect to unload␊
382␉// the base code will result in a hang or kernel panic.␊
383␉gUnloadPXEOnExit = true;␊
384␊
385␉// Record the device that the booter was loaded from.␊
386␉gBIOSDev = biosdev & kBIOSDevMask;␊
387␊
388␉// Initialize boot info structure.␊
389␉initKernBootStruct();␊
390␊
391␉initBooterLog();␊
392␊
393␉// Setup VGA text mode.␊
394␉// Not sure if it is safe to call setVideoMode() before the␊
395␉// config table has been loaded. Call video_mode() instead.␊
396#if DEBUG␊
397␉printf("before video_mode\n");␊
398#endif␊
399␉video_mode( 2 ); // 80x25 mono text mode.␊
400#if DEBUG␊
401␉printf("after video_mode\n");␊
402#endif␊
403␊
404␉// Scan and record the system's hardware information.␊
405␉scan_platform();␊
406␊
407␉// First get info for boot volume.␊
408␉scanBootVolumes(gBIOSDev, 0);␊
409␉bvChain = getBVChainForBIOSDev(gBIOSDev);␊
410␉setBootGlobals(bvChain);␊
411␊
412␉// Load boot.plist config file␊
413␉status = loadChameleonConfig(&bootInfo->chameleonConfig);␊
414␊
415␉if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->chameleonConfig) && quiet) {␊
416␉␉gBootMode |= kBootModeQuiet;␊
417␉}␊
418␊
419␉// Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
420␉if (getBoolForKey(kInstantMenuKey, &instantMenu, &bootInfo->chameleonConfig) && instantMenu) {␊
421␉␉firstRun = false;␊
422␉}␊
423␊
424␉// Loading preboot ramdisk if exists.␊
425␉loadPrebootRAMDisk();␊
426␊
427␉// Disable rescan option by default␊
428␉gEnableCDROMRescan = false;␊
429␊
430␉// Enable it with Rescan=y in system config␊
431␉if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->chameleonConfig)␊
432␉␉&& gEnableCDROMRescan) {␊
433␉␉gEnableCDROMRescan = true;␊
434␉}␊
435␊
436␉// Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
437␉rescanPrompt = false;␊
438␉if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->chameleonConfig)␊
439␉␉&& rescanPrompt && biosDevIsCDROM(gBIOSDev))␊
440␉{␊
441␉␉gEnableCDROMRescan = promptForRescanOption();␊
442␉}␊
443␊
444␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
445␉if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->chameleonConfig)␊
446␉␉&& gScanSingleDrive) {␊
447␉␉gScanSingleDrive = true;␊
448␉}␊
449␊
450␉// Create a list of partitions on device(s).␊
451␉if (gScanSingleDrive) {␊
452␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
453␉} else {␊
454␉␉scanDisks(gBIOSDev, &bvCount);␊
455␉}␊
456␊
457␉// Create a separated bvr chain using the specified filters.␊
458␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
459␊
460␉gBootVolume = selectBootVolume(bvChain);␊
461␊
462␉// Intialize module system ␊
463␉init_module_system();␊
464␊
465#if DEBUG␊
466␉printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
467␉␉␉ gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
468␉printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
469␉␉␉ gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
470␉getchar();␊
471#endif␊
472␊
473␉useGUI = true;␊
474␉// Override useGUI default␊
475␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->chameleonConfig);␊
476␉if (useGUI && initGUI())␊
477␉{␊
478␉␉// initGUI() returned with an error, disabling GUI.␊
479␉␉useGUI = false;␊
480␉}␊
481␊
482␉setBootGlobals(bvChain);␊
483␊
484␉// Parse args, load and start kernel.␊
485␉while (1)␊
486␉{␊
487␉␉bool␉␉tryresume, tryresumedefault, forceresume;␊
488␉␉bool␉␉useKernelCache = true; // by default try to use the prelinked kernel␊
489␉␉const char␉*val;␊
490␉␉int␉␉␉len, ret = -1;␊
491␉␉long␉␉flags, sleeptime, time;␊
492␉␉void␉␉*binary = (void *)kLoadAddr;␊
493␊
494␉␉char bootFile[sizeof(bootInfo->bootFile)];␊
495␉␉char␉␉bootFilePath[512];␊
496␉␉char␉␉kernelCacheFile[512];␊
497␊
498␉␉// Initialize globals.␊
499␉␉sysConfigValid = false;␊
500␉␉gErrors␉␉ = false;␊
501␊
502␉␉status = getBootOptions(firstRun);␊
503␉␉firstRun = false;␊
504␉␉if (status == -1) continue;␊
505␊
506␉␉status = processBootOptions();␊
507␉␉// Status == 1 means to chainboot␊
508␉␉if ( status ==␉1 ) break;␊
509␉␉// Status == -1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
510␉␉if ( status == -1 )␊
511␉␉{␊
512␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
513␉␉␉if (gBootVolume == NULL)␊
514␉␉␉{␊
515␉␉␉␉freeFilteredBVChain(bvChain);␊
516␉␉␉␉␊
517␉␉␉␉if (gEnableCDROMRescan)␊
518␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
519␉␉␉␉␊
520␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
521␉␉␉␉setBootGlobals(bvChain);␊
522␉␉␉␉setupDeviceList(&bootInfo->themeConfig);␊
523␉␉␉}␊
524␉␉␉continue;␊
525␉␉}␊
526␊
527␉␉// Other status (e.g. 0) means that we should proceed with boot.␊
528␊
529␉␉// Turn off any GUI elements␊
530␉␉if ( bootArgs->Video.v_display == GRAPHICS_MODE )␊
531␉␉{␊
532␉␉␉gui.devicelist.draw = false;␊
533␉␉␉gui.bootprompt.draw = false;␊
534␉␉␉gui.menu.draw = false;␊
535␉␉␉gui.infobox.draw = false;␊
536␉␉␉gui.logo.draw = false;␊
537␉␉␉drawBackground();␊
538␉␉␉updateVRAM();␊
539␉␉}␊
540␊
541␉␉// Find out which version mac os we're booting.␊
542␉␉getOSVersion();␊
543␊
544␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
545␉␉␉archCpuType = CPU_TYPE_X86_64;␊
546␉␉} else {␊
547␉␉␉archCpuType = CPU_TYPE_I386;␊
548␉␉}␊
549␊
550␉␉if (getValueForKey(karch, &val, &len, &bootInfo->chameleonConfig)) {␊
551␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
552␉␉␉␉archCpuType = CPU_TYPE_I386;␊
553␉␉␉}␊
554␉␉}␊
555␊
556␉␉if (getValueForKey(kKernelArchKey, &val, &len, &bootInfo->chameleonConfig)) {␊
557␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
558␉␉␉␉archCpuType = CPU_TYPE_I386;␊
559␉␉␉}␊
560␉␉}␊
561␊
562␉␉// Notify modules that we are attempting to boot␊
563␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
564␊
565␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->chameleonConfig)) {␊
566␉␉␉tryresume = true;␊
567␉␉␉tryresumedefault = true;␊
568␉␉} else {␊
569␉␉␉tryresumedefault = false;␊
570␉␉}␊
571␊
572␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->chameleonConfig)) {␊
573␉␉␉forceresume = false;␊
574␉␉}␊
575␊
576␉␉if (forceresume) {␊
577␉␉␉tryresume = true;␊
578␉␉␉tryresumedefault = false;␊
579␉␉}␊
580␊
581␉␉while (tryresume) {␊
582␉␉␉const char *tmp;␊
583␉␉␉BVRef bvr;␊
584␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->chameleonConfig))␊
585␉␉␉␉val = "/private/var/vm/sleepimage";␊
586␊
587␉␉␉// Do this first to be sure that root volume is mounted␊
588␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
589␊
590␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
591␉␉␉␉break;␊
592␊
593␉␉␉// Can't check if it was hibernation Wake=y is required␊
594␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
595␉␉␉␉break;␊
596␊
597␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
598␉␉␉␉break;␊
599␊
600␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
601#if DEBUG␊
602␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",␊
603␉␉␉␉␉␉bvr->modTime-sleeptime);␊
604#endif␊
605␉␉␉␉break;␊
606␉␉␉}␊
607␊
608␉␉␉HibernateBoot((char *)val);␊
609␉␉␉break;␊
610␉␉}␊
611␉␉␊
612␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
613␊
614␉␉getBoolForKey(kUseKernelCache, &useKernelCache, &bootInfo->chameleonConfig);␊
615␉␉if (useKernelCache) do {␊
616␊
617␉␉␉// Determine the name of the Kernel Cache␊
618␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
619␉␉␉␉if (val[0] == '\\')␊
620␉␉␉␉{␊
621␉␉␉␉␉len--;␊
622␉␉␉␉␉val++;␊
623␉␉␉␉}␊
624␉␉␉␉/* FIXME: check len vs sizeof(kernelCacheFile) */␊
625␉␉␉␉strlcpy(kernelCacheFile, val, len + 1);␊
626␉␉␉} else {␊
627␉␉␉␉kernelCacheFile[0] = 0; // Use default kernel cache file␊
628␉␉␉}␊
629␊
630␉␉␉if (gOverrideKernel && kernelCacheFile[0] == 0) {␊
631␉␉␉␉verbose("Using a non default kernel (%s) without specifying 'Kernel Cache' path, KernelCache will not be used\n",␊
632␉␉␉␉␉␉bootInfo->bootFile);␊
633␉␉␉␉useKernelCache = false;␊
634␉␉␉␉break;␊
635␉␉␉}␊
636␉␉␉if (gMKextName[0] != 0) {␊
637␉␉␉␉verbose("Using a specific MKext Cache (%s), KernelCache will not be used\n",␊
638␉␉␉␉␉␉gMKextName);␊
639␉␉␉␉useKernelCache = false;␊
640␉␉␉␉break;␊
641␉␉␉}␊
642␉␉␉if (gBootFileType != kBlockDeviceType)␊
643␉␉␉␉useKernelCache = false;␊
644␊
645␉␉} while(0);␊
646␊
647␉␉do {␊
648␉␉␉if (useKernelCache) {␊
649␉␉␉␉ret = LoadKernelCache(kernelCacheFile, &binary);␊
650␉␉␉␉if (ret >= 0)␊
651␉␉␉␉␉break;␊
652␉␉␉}␊
653␊
654␉␉␉bool bootFileWithDevice = false;␊
655␉␉␉// Check if bootFile start with a device ex: bt(0,0)/Extra/mach_kernel␊
656␉␉␉if (strncmp(bootInfo->bootFile,"bt(",3) == 0 ||␊
657␉␉␉␉strncmp(bootInfo->bootFile,"hd(",3) == 0 ||␊
658␉␉␉␉strncmp(bootInfo->bootFile,"rd(",3) == 0)␊
659␉␉␉␉bootFileWithDevice = true;␊
660␊
661␉␉␉// bootFile must start with a / if it not start with a device name␊
662␉␉␉if (!bootFileWithDevice && (bootInfo->bootFile)[0] != '/')␊
663␉␉␉␉snprintf(bootFile, sizeof(bootFile), "/%s", bootInfo->bootFile); // append a leading /␊
664␉␉␉else␊
665␉␉␉␉strlcpy(bootFile, bootInfo->bootFile, sizeof(bootFile));␊
666␊
667␉␉␉// Try to load kernel image from alternate locations on boot helper partitions.␊
668␉␉␉ret = -1;␊
669␉␉␉if ((gBootVolume->flags & kBVFlagBooter) && !bootFileWithDevice) {␊
670␉␉␉␉snprintf(bootFilePath, sizeof(bootFilePath), "com.apple.boot.P%s", bootFile);␊
671␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
672␉␉␉␉if (ret == -1)␊
673␉␉␉␉{␊
674␉␉␉␉␉snprintf(bootFilePath, sizeof(bootFilePath), "com.apple.boot.R%s", bootFile);␊
675␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
676␉␉␉␉␉if (ret == -1)␊
677␉␉␉␉␉{␊
678␉␉␉␉␉␉snprintf(bootFilePath, sizeof(bootFilePath), "com.apple.boot.S%s", bootFile);␊
679␉␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
680␉␉␉␉␉}␊
681␉␉␉␉}␊
682␉␉␉}␊
683␉␉␉if (ret == -1) {␊
684␉␉␉␉// No alternate location found, using the original kernel image path.␊
685␉␉␉␉strlcpy(bootFilePath, bootFile, sizeof(bootFilePath));␊
686␉␉␉}␊
687␊
688␉␉␉verbose("Loading kernel %s\n", bootFilePath);␊
689␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
690␉␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
691␉␉␉{␊
692␉␉␉␉archCpuType = CPU_TYPE_I386;␊
693␉␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
694␉␉␉}␊
695␉␉} while (0);␊
696␊
697␉␉clearActivityIndicator();␊
698␊
699#if DEBUG␊
700␉␉printf("Pausing...");␊
701␉␉sleep(8);␊
702#endif␊
703␊
704␉␉if (ret <= 0) {␊
705␉␉␉printf("Can't find %s\n", bootFile);␊
706␉␉␉sleep(1);␊
707␊
708␉␉␉if (gBootFileType == kNetworkDeviceType) {␊
709␉␉␉␉// Return control back to PXE. Don't unload PXE base code.␊
710␉␉␉␉gUnloadPXEOnExit = false;␊
711␉␉␉␉break;␊
712␉␉␉}␊
713␉␉␉pause();␊
714␊
715␉␉} else {␊
716␉␉␉/* Won't return if successful. */␊
717␉␉␉ret = ExecKernel(binary);␊
718␉␉}␊
719␉}␊
720␉␊
721␉// chainboot␊
722␉if (status == 1) {␊
723␉␉// if we are already in graphics-mode,␊
724␉␉if (getVideoMode() == GRAPHICS_MODE) {␊
725␉␉␉setVideoMode(VGA_TEXT_MODE, 0); // switch back to text mode.␊
726␉␉}␊
727␉}␊
728␉␊
729␉if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
730␉␉nbpUnloadBaseCode();␊
731␉}␊
732}␊
733␊
734/*!␊
735␉Selects a new BIOS device, taking care to update the global state appropriately.␊
736 */␊
737/*␊
738static void selectBiosDevice(void)␊
739{␊
740␉struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
741␉CacheReset();␊
742␉diskFreeMap(oldMap);␊
743␉oldMap = NULL;␊
744␉␊
745␉int dev = selectAlternateBootDevice(gBIOSDev);␊
746␉␊
747␉BVRef bvchain = scanBootVolumes(dev, 0);␊
748␉BVRef bootVol = selectBootVolume(bvchain);␊
749␉gBootVolume = bootVol;␊
750␉setRootVolume(bootVol);␊
751␉gBIOSDev = dev;␊
752}␊
753*/␊
754␊
755bool checkOSVersion(const char * version) ␊
756{␊
757␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1])␊
758␉␉␉&& (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
759}␊
760␊
761static void getOSVersion()␊
762{␊
763␉strncpy(gMacOSVersion, gBootVolume->OSVersion, sizeof(gMacOSVersion));␊
764}␊
765␊
766#define BASE 65521L /* largest prime smaller than 65536 */␊
767#define NMAX 5000␊
768// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
769␊
770#define DO1(buf, i)␉{s1 += buf[i]; s2 += s1;}␊
771#define DO2(buf, i)␉DO1(buf, i); DO1(buf, i + 1);␊
772#define DO4(buf, i)␉DO2(buf, i); DO2(buf, i + 2);␊
773#define DO8(buf, i)␉DO4(buf, i); DO4(buf, i + 4);␊
774#define DO16(buf)␉DO8(buf, 0); DO8(buf, 8);␊
775␊
776unsigned long Adler32(unsigned char *buf, long len)␊
777{␊
778␉unsigned long s1 = 1; // adler & 0xffff;␊
779␉unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
780␉unsigned long result;␊
781␉int k;␊
782␉␊
783␉while (len > 0) {␊
784␉␉k = len < NMAX ? len : NMAX;␊
785␉␉len -= k;␊
786␉␉while (k >= 16) {␊
787␉␉␉DO16(buf);␊
788␉␉␉buf += 16;␊
789␉␉␉k -= 16;␊
790␉␉}␊
791␉␉if (k != 0) do {␊
792␉␉␉s1 += *buf++;␊
793␉␉␉s2 += s1;␊
794␉␉} while (--k);␊
795␉␉s1 %= BASE;␊
796␉␉s2 %= BASE;␊
797␉}␊
798␉result = (s2 << 16) | s1;␊
799␉return OSSwapHostToBigInt32(result);␊
800}␊
801

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