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Source at commit 735 created 9 years 5 months ago.
By meklort, GUI module bugfixes. Kext Patcher additions.
1/*
2 * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights
7 * Reserved. This file contains Original Code and/or Modifications of
8 * Original Code as defined in and that are subject to the Apple Public
9 * Source License Version 2.0 (the "License"). You may not use this file
10 * except in compliance with the License. Please obtain a copy of the
11 * License at http://www.apple.com/publicsource and read it before using
12 * this file.
13 *
14 * The Original Code and all software distributed under the License are
15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
19 * License for the specific language governing rights and limitations
20 * under the License.
21 *
22 * @APPLE_LICENSE_HEADER_END@
23 */
24/*
25 * Mach Operating System
26 * Copyright (c) 1990 Carnegie-Mellon University
27 * Copyright (c) 1989 Carnegie-Mellon University
28 * All rights reserved. The CMU software License Agreement specifies
29 * the terms and conditions for use and redistribution.
30 */
31
32/*
33 * INTEL CORPORATION PROPRIETARY INFORMATION
34 *
35 * This software is supplied under the terms of a license agreement or
36 * nondisclosure agreement with Intel Corporation and may not be copied
37 * nor disclosed except in accordance with the terms of that agreement.
38 *
39 * Copyright 1988, 1989 by Intel Corporation
40 */
41
42/*
43 * Copyright 1993 NeXT Computer, Inc.
44 * All rights reserved.
45 */
46
47/*
48 * Completely reworked by Sam Streeper (sam_s@NeXT.com)
49 * Reworked again by Curtis Galloway (galloway@NeXT.com)
50 */
51
52
53#include "boot.h"
54#include "bootstruct.h"
55#include "fake_efi.h"
56#include "sl.h"
57#include "libsa.h"
58#include "ramdisk.h"
59#include "platform.h"
60#include "graphics.h"
61
62#include "modules.h"
63
64long gBootMode; /* defaults to 0 == kBootModeNormal */
65bool gOverrideKernel;
66static char gBootKernelCacheFile[512];
67static char gCacheNameAdler[64 + 256];
68char *gPlatformName = gCacheNameAdler;
69char gRootDevice[512];
70char gMKextName[512];
71char gMacOSVersion[8];
72#ifndef OPTION_ROM
73bool gEnableCDROMRescan;
74bool gScanSingleDrive;
75#endif
76
77
78int bvCount = 0;
79//intmenucount = 0;
80int gDeviceCount = 0;
81
82BVRef bvr;
83BVRef menuBVR;
84BVRef bvChain;
85
86//static void selectBiosDevice(void);
87static unsigned long Adler32(unsigned char *buffer, long length);
88static bool getOSVersion(char *str);
89
90#ifndef OPTION_ROM
91static bool gUnloadPXEOnExit = false;
92#endif
93
94/*
95 * How long to wait (in seconds) to load the
96 * kernel after displaying the "boot:" prompt.
97 */
98#define kBootErrorTimeout 5
99
100/*
101 * Default path to kernel cache file
102 */
103#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"
104
105//==========================================================================
106// Zero the BSS.
107
108static void zeroBSS(void)
109{
110extern char _DATA__bss__begin, _DATA__bss__end;
111extern char _DATA__common__begin, _DATA__common__end;
112
113bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));
114bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));
115}
116
117//==========================================================================
118// Malloc error function
119
120static void malloc_error(char *addr, size_t size, const char *file, int line)
121{
122stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);
123}
124
125//==========================================================================
126//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.
127//
128void initialize_runtime(void)
129{
130zeroBSS();
131malloc_init(0, 0, 0, malloc_error);
132}
133
134//==========================================================================
135// execKernel - Load the kernel image (mach-o) and jump to its entry point.
136
137int ExecKernel(void *binary)
138{
139 entry_t kernelEntry;
140 int ret;
141
142 bootArgs->kaddr = bootArgs->ksize = 0;
143execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);
144
145 ret = DecodeKernel(binary,
146 &kernelEntry,
147 (char **) &bootArgs->kaddr,
148 (int *)&bootArgs->ksize );
149
150 if ( ret != 0 )
151 return ret;
152 // Reserve space for boot args
153 reserveKernBootStruct();
154
155 // Load boot drivers from the specifed root path.
156execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);
157
158
159setupFakeEfi();
160
161 if (!gHaveKernelCache) {
162LoadDrivers("/");
163 }
164
165 clearActivityIndicator();
166
167 if (gErrors) {
168 printf("Errors encountered while starting up the computer.\n");
169 printf("Pausing %d seconds...\n", kBootErrorTimeout);
170 sleep(kBootErrorTimeout);
171 }
172
173md0Ramdisk();
174
175 verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");
176#ifndef OPTION_ROM
177 // Cleanup the PXE base code.
178
179 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {
180if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )
181 {
182 printf("nbpUnloadBaseCode error %d\n", (int) ret);
183 sleep(2);
184 }
185 }
186#endif
187 bool dummyVal;
188if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal)
189{
190printf("Press any key to continue...");
191getc();
192}
193
194execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);// Notify modules that the kernel is about to be started
195
196if (bootArgs->Video.v_display == VGA_TEXT_MODE || gVerboseMode)
197{
198// Draw gray screen. NOTE: no boot image, that's in the gui module
199#ifndef OPTION_ROM
200if(!gVerboseMode) drawColorRectangle(0, 0, DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT, 0x01);
201setVideoMode( GRAPHICS_MODE, 0 );
202
203#endif
204}
205
206
207setupBooterLog();
208
209 finalizeBootStruct();
210
211// Jump to kernel's entry point. There's no going back now.
212 startprog( kernelEntry, bootArgs );
213
214 // Not reached
215
216 return 0;
217}
218
219//==========================================================================
220// This is the entrypoint from real-mode which functions exactly as it did
221// before. Multiboot does its own runtime initialization, does some of its
222// own things, and then calls common_boot.
223void boot(int biosdev)
224{
225initialize_runtime();
226// Enable A20 gate before accessing memory above 1Mb.
227enableA20();
228common_boot(biosdev);
229}
230
231//==========================================================================
232// The 'main' function for the booter. Called by boot0 when booting
233// from a block device, or by the network booter.
234//
235// arguments:
236// biosdev - Value passed from boot1/NBP to specify the device
237// that the booter was loaded from.
238//
239// If biosdev is kBIOSDevNetwork, then this function will return if
240// booting was unsuccessful. This allows the PXE firmware to try the
241// next boot device on its list.
242void common_boot(int biosdev)
243{
244 int status;
245 char *bootFile;
246 unsigned long adler32;
247 bool quiet;
248 bool firstRun = true;
249 bool instantMenu;
250#ifndef OPTION_ROM
251 bool rescanPrompt;
252#endif
253 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;
254 unsigned int denyBVFlags = kBVFlagEFISystem;
255
256#ifndef OPTION_ROM
257 // Set reminder to unload the PXE base code. Neglect to unload
258 // the base code will result in a hang or kernel panic.
259 gUnloadPXEOnExit = true;
260#endif
261
262 // Record the device that the booter was loaded from.
263 gBIOSDev = biosdev & kBIOSDevMask;
264
265 // Initialize boot info structure.
266 initKernBootStruct();
267
268initBooterLog();
269
270 // Setup VGA text mode.
271 // Not sure if it is safe to call setVideoMode() before the
272 // config table has been loaded. Call video_mode() instead.
273#if DEBUG
274 printf("before video_mode\n");
275#endif
276 video_mode( 2 ); // 80x25 mono text mode.
277#if DEBUG
278 printf("after video_mode\n");
279#endif
280
281 // Scan and record the system's hardware information.
282 scan_platform();
283
284 // First get info for boot volume.
285 scanBootVolumes(gBIOSDev, 0);
286 bvChain = getBVChainForBIOSDev(gBIOSDev);
287 setBootGlobals(bvChain);
288
289 // Load boot.plist config file
290 status = loadSystemConfig(&bootInfo->bootConfig);
291
292 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {
293 gBootMode |= kBootModeQuiet;
294 }
295
296 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config
297 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {
298 firstRun = false;
299 }
300
301#ifndef OPTION_ROM
302// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.
303 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {
304 gScanSingleDrive = true;
305 }
306
307// Create a list of partitions on device(s).
308 if (gScanSingleDrive)
309{
310scanBootVolumes(gBIOSDev, &bvCount);
311 }
312else
313#endif
314{
315scanDisks(gBIOSDev, &bvCount);
316 }
317
318// Create a separated bvr chain using the specified filters.
319 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);
320gBootVolume = selectBootVolume(bvChain);
321
322
323// Intialize module system, module sytem will
324init_module_system();
325
326
327#ifndef OPTION_ROM
328 // Loading preboot ramdisk if exists.
329 loadPrebootRAMDisk();
330
331 // Disable rescan option by default
332 gEnableCDROMRescan = false;
333
334 // Enable it with Rescan=y in system config
335 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {
336 gEnableCDROMRescan = true;
337 }
338
339 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.
340 rescanPrompt = false;
341 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {
342 gEnableCDROMRescan = promptForRescanOption();
343 }
344#endif
345
346
347
348
349#if DEBUG
350 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);
351 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);
352 getc();
353#endif
354
355
356
357 setBootGlobals(bvChain);
358
359 // Parse args, load and start kernel.
360 while (1) {
361 const char *val;
362 int len;
363 int trycache;
364 long flags, cachetime, kerneltime, exttime, sleeptime, time;
365 int ret = -1;
366 void *binary = (void *)kLoadAddr;
367 bool tryresume;
368 bool tryresumedefault;
369 bool forceresume;
370
371 // additional variable for testing alternate kernel image locations on boot helper partitions.
372 char bootFileSpec[512];
373
374 // Initialize globals.
375
376 sysConfigValid = false;
377 gErrors = false;
378
379 status = getBootOptions(firstRun);
380 firstRun = false;
381 if (status == -1) continue;
382
383 status = processBootOptions();
384 // Status==1 means to chainboot
385 if ( status == 1 ) break;
386 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL
387 if ( status == -1 )
388 {
389// gBootVolume == NULL usually means the user hit escape.
390if(gBootVolume == NULL)
391{
392freeFilteredBVChain(bvChain);
393#ifndef OPTION_ROM
394if (gEnableCDROMRescan)
395rescanBIOSDevice(gBIOSDev);
396#endif
397
398bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);
399setBootGlobals(bvChain);
400}
401continue;
402 }
403
404
405
406 // Other status (e.g. 0) means that we should proceed with boot.
407
408
409// Find out which version mac os we're booting.
410getOSVersion(gMacOSVersion);
411
412if (platformCPUFeature(CPU_FEATURE_EM64T)) {
413archCpuType = CPU_TYPE_X86_64;
414} else {
415archCpuType = CPU_TYPE_I386;
416}
417if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {
418if (strncmp(val, "i386", 4) == 0) {
419archCpuType = CPU_TYPE_I386;
420}
421}
422
423// Notify moduals that we are attempting to boot
424execute_hook("PreBoot", NULL, NULL, NULL, NULL);
425
426if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {
427tryresume = true;
428tryresumedefault = true;
429} else {
430tryresumedefault = false;
431}
432
433if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {
434forceresume = false;
435}
436
437if (forceresume) {
438tryresume = true;
439tryresumedefault = false;
440}
441
442while (tryresume) {
443const char *tmp;
444BVRef bvr;
445if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))
446val="/private/var/vm/sleepimage";
447
448// Do this first to be sure that root volume is mounted
449ret = GetFileInfo(0, val, &flags, &sleeptime);
450
451if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)
452break;
453
454// Can't check if it was hibernation Wake=y is required
455if (bvr->modTime == 0 && tryresumedefault)
456break;
457
458if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))
459break;
460
461if (!forceresume && ((sleeptime+3)<bvr->modTime)) {
462printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);
463break;
464}
465
466HibernateBoot((char *)val);
467break;
468}
469
470 // Reset cache name.
471 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);
472
473 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);
474
475 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));
476
477 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {
478 strlcpy(gBootKernelCacheFile, val, len+1);
479 } else {
480 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);
481 }
482
483 // Check for cache file.
484 trycache = (((gBootMode & kBootModeSafe) == 0) &&
485 !gOverrideKernel &&
486 (gBootFileType == kBlockDeviceType) &&
487 (gMKextName[0] == '\0') &&
488 (gBootKernelCacheFile[0] != '\0'));
489
490verbose("Loading Darwin %s\n", gMacOSVersion);
491
492 if (trycache) do {
493
494 // if we haven't found the kernel yet, don't use the cache
495 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);
496 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {
497 trycache = 0;
498 break;
499 }
500 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);
501 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)
502 || (cachetime < kerneltime)) {
503 trycache = 0;
504 break;
505 }
506 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);
507 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)
508 && (cachetime < exttime)) {
509 trycache = 0;
510 break;
511 }
512 if (kerneltime > exttime) {
513 exttime = kerneltime;
514 }
515 if (cachetime != (exttime + 1)) {
516 trycache = 0;
517 break;
518 }
519 } while (0);
520
521 do {
522 if (trycache) {
523 bootFile = gBootKernelCacheFile;
524 verbose("Loading kernel cache %s\n", bootFile);
525 ret = LoadFile(bootFile);
526 binary = (void *)kLoadAddr;
527 if (ret >= 0) {
528 break;
529 }
530 }
531 bootFile = bootInfo->bootFile;
532
533 // Try to load kernel image from alternate locations on boot helper partitions.
534 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);
535 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time);
536 if (ret == -1)
537 {
538sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);
539ret = GetFileInfo(NULL, bootFileSpec, &flags, &time);
540if (ret == -1)
541{
542sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);
543ret = GetFileInfo(NULL, bootFileSpec, &flags, &time);
544if (ret == -1)
545{
546// Not found any alternate locations, using the original kernel image path.
547strcpy(bootFileSpec, bootFile);
548}
549}
550 }
551
552 verbose("Loading kernel %s\n", bootFileSpec);
553 ret = LoadThinFatFile(bootFileSpec, &binary);
554 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)
555 {
556archCpuType = CPU_TYPE_I386;
557ret = LoadThinFatFile(bootFileSpec, &binary);
558 }
559
560 } while (0);
561
562 clearActivityIndicator();
563#if DEBUG
564 printf("Pausing...");
565 sleep(8);
566#endif
567
568 if (ret <= 0) {
569printf("Can't find %s\n", bootFile);
570
571sleep(1);
572#ifndef OPTION_ROM
573 if (gBootFileType == kNetworkDeviceType) {
574 // Return control back to PXE. Don't unload PXE base code.
575 gUnloadPXEOnExit = false;
576 break;
577 }
578#endif
579 } else {
580 /* Won't return if successful. */
581// Notify modules that ExecKernel is about to be called
582 ret = ExecKernel(binary);
583 }
584 }
585
586 // chainboot
587 if (status==1) {
588if (getVideoMode() == GRAPHICS_MODE) {// if we are already in graphics-mode,
589setVideoMode(VGA_TEXT_MODE, 0);// switch back to text mode
590}
591 }
592#ifndef OPTION_ROM
593 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {
594nbpUnloadBaseCode();
595 }
596#endif
597}
598
599/*!
600 Selects a new BIOS device, taking care to update the global state appropriately.
601 */
602/*
603 static void selectBiosDevice(void)
604 {
605 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);
606 CacheReset();
607 diskFreeMap(oldMap);
608 oldMap = NULL;
609
610 int dev = selectAlternateBootDevice(gBIOSDev);
611
612 BVRef bvchain = scanBootVolumes(dev, 0);
613 BVRef bootVol = selectBootVolume(bvchain);
614 gBootVolume = bootVol;
615 setRootVolume(bootVol);
616 gBIOSDev = dev;
617 }
618 */
619
620static bool getOSVersion(char *str)
621{
622bool valid = false;
623config_file_t systemVersion;
624const char *val;
625int len;
626
627if (!loadConfigFile("/System/Library/CoreServices/SystemVersion.plist", &systemVersion))
628{
629valid = true;
630}
631else if (!loadConfigFile("/System/Library/CoreServices/ServerVersion.plist", &systemVersion))
632{
633valid = true;
634}
635
636if (valid)
637{
638if (getValueForKey(kProductVersion, &val, &len, &systemVersion))
639{
640// getValueForKey uses const char for val
641// so copy it and trim
642*str = '\0';
643strncat(str, val, MIN(len, 4));
644}
645else
646valid = false;
647}
648
649return valid;
650}
651
652#define BASE 65521L /* largest prime smaller than 65536 */
653#define NMAX 5000
654// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1
655
656#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
657#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
658#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
659#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
660#define DO16(buf) DO8(buf,0); DO8(buf,8);
661
662unsigned long Adler32(unsigned char *buf, long len)
663{
664 unsigned long s1 = 1; // adler & 0xffff;
665 unsigned long s2 = 0; // (adler >> 16) & 0xffff;
666 unsigned long result;
667 int k;
668
669 while (len > 0) {
670 k = len < NMAX ? len : NMAX;
671 len -= k;
672 while (k >= 16) {
673 DO16(buf);
674 buf += 16;
675 k -= 16;
676 }
677 if (k != 0) do {
678 s1 += *buf++;
679 s2 += s1;
680 } while (--k);
681 s1 %= BASE;
682 s2 %= BASE;
683 }
684 result = (s2 << 16) | s1;
685 return OSSwapHostToBigInt32(result);
686}
687

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