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Root/branches/meklort/i386/modules/KextPatcher/kext_patcher.c

Source at commit 628 created 13 years 5 months ago.
By meklort, Kext patcher update. Supports patching the GMA950 FB kext for use on the GMA3150, only tested on 10.6.5
1␉/*␊
2 * Copyright (c) 2010 Evan Lojewski. All rights reserved.␊
3 *␉␊
4 *␉KextPather␊
5 *␉This is an experimental module that I'm looking into implimenting.␊
6 *␉The main purpose is to replace the need for programs such as ␊
7 * NetbookInstaller's kext patching routines. THis way, Apple's kexts can be␊
8 * patched whe loaded instead. (eg: GMA950 kext, Bluetooth + Wifi kexts)␊
9 */␊
10␊
11#include "libsaio.h"␊
12#include "zlib.h"␊
13#include "kext_patcher.h"␊
14#include "boot.h"␊
15#include "bootstruct.h"␊
16#include "pci.h"␊
17#include "drivers.h"␊
18#include "mkext.h"␊
19#include "modules.h"␊
20#include "hex_editor.h"␊
21␊
22␊
23#define kHDACodec␉␉␉␉"HDACodec"␊
24␊
25␊
26#ifndef DEBUG_KEXT_PATCHER␊
27#define DEBUG_KEXT_PATCHER 0␊
28#endif␊
29␊
30#if DEBUG_KEXT_PATCHER␊
31#define DBG(x...)␉printf(x)␊
32#else␊
33#define DBG(x...)␊
34#endif␊
35␊
36␊
37bool patch_kext(TagPtr plist, char* plistbuffer, void* start);␊
38bool patch_gma_kexts(TagPtr plist, char* plistbuffer, void* start);␊
39bool patch_bcm_kext(TagPtr plist, char* plistbuffer, void* start);␊
40bool patch_hda_kext(TagPtr plist, char* plistbuffer, void* start);␊
41bool patch_hda_controller(TagPtr plist, char* plistbuffer, void* start);␊
42␊
43int chartohex(char c);␊
44␊
45static void * z_alloc(void *, u_int items, u_int size);␊
46static void z_free(void *, void *ptr);␊
47␊
48uint16_t patch_gma_deviceid = 0;␊
49uint16_t patch_bcm_deviceid = 0;␊
50// TODO: add detection code / a method for users to enter the id␊
51uint16_t patch_hda_codec = 0;␊
52␊
53#define NEEDS_PATCHING␉␉(patch_bcm_deviceid || patch_gma_deviceid || patch_hda_codec)␊
54␊
55typedef struct z_mem {␊
56 uint32_t alloc_size;␊
57 uint8_t data[0];␊
58} z_mem;␊
59␊
60/*␊
61 * Space allocation and freeing routines for use by zlib routines.␊
62 */␊
63void *␊
64z_alloc(void * notused __unused, u_int num_items, u_int size)␊
65{␊
66 void * result = NULL;␊
67 z_mem * zmem = NULL;␊
68 uint32_t total = num_items * size;␊
69 uint32_t allocSize = total + sizeof(zmem);␊
70 ␊
71 zmem = (z_mem *)malloc(allocSize);␊
72 if (!zmem) {␊
73 goto finish;␊
74 }␊
75 zmem->alloc_size = allocSize;␊
76 result = (void *)&(zmem->data);␊
77finish:␊
78 return result;␊
79}␊
80␊
81void␊
82z_free(void * notused __unused, void * ptr)␊
83{␊
84 uint32_t * skipper = (uint32_t *)ptr - 1;␊
85 z_mem * zmem = (z_mem *)skipper;␊
86 free((void *)zmem);␊
87 return;␊
88}␊
89␊
90␊
91unsigned long Mkext_Alder32( unsigned char * buffer, long length );␊
92␊
93void KextPatcher_hook(void* current, void* arg2, void* arg3, void* arg4);␊
94␊
95/**␊
96 ** KextPatcher_start -> module start␊
97 **␉␉Notified the module system that this module will hook into the ␊
98 **␉␉LoadMatchedModules and LoadDriverMKext functions␊
99 **/␊
100void KextPatcher_start()␊
101{␉␉␊
102␉// Hooks into the following:␊
103␉//␉execute_hook("LoadDriverMKext", (void*)package, (void*) length, NULL, NULL);␊
104␉// execute_hook("LoadMatchedModules", module, &length, executableAddr, NULL);␊
105␊
106␉register_hook_callback("PCIDevice", &KextPatcher_hook);␊
107␉//register_hook_callback("LoadMatchedModules", &kext_loaded); ␊
108␉register_hook_callback("LoadDriverMKext", &mkext_loaded); ␊
109␊
110}␊
111␊
112/**␊
113 ** kext_loaded -> Called whenever a kext is in read into memory␊
114 **␉␉This function will be used to patch kexts ( eg AppleInteIntegratedFramebuffer)␊
115 **␉␉and their plists when they are loaded into memmory␊
116 **/␊
117void kext_loaded(void* moduletmp, void* lengthprt, void* executableAddr, void* arg3)␊
118{␊
119␉␊
120␉//ModulePtr module = moduletmp;␊
121␉//long length = *(long*)lengthprt;␊
122␉//long length2 = strlen(module->plistAddr);␊
123␉// *(long*)lengthprt = length2 + 5 * 1024 * 1024;␊
124␊
125␉//printf("Loading %s, lenght is %d, executable is 0x%X\n", module->plistAddr, length, executableAddr);␊
126␉//getc();␊
127}␊
128␊
129/**␊
130 ** mkext_loaded -> Called whenever an mkext is in read into memory␊
131 **␉␉This function will be used to patch mkext. Matching kexts will be␊
132 **␉␉Extracted, modified, and then compressed again. Note: I need to determine␊
133 **␉␉what sort of slowdown this will cause and if it's worth implimenting.␊
134 **/␊
135␊
136void mkext_loaded(void* filespec, void* packagetmp, void* lengthtmp, void* arg3)␊
137{␊
138␉const char* hda_codec;␊
139␉int len = 0;␊
140␉␊
141␉if (getValueForKey(kHDACodec, &hda_codec, &len, &bootInfo->bootConfig))␊
142␉{␊
143␉␉int index = 0;␊
144␉␉while(len)␊
145␉␉{␊
146␉␉␉patch_hda_codec <<= 4;␊
147␉␉␉patch_hda_codec |= chartohex(hda_codec[index]);␊
148␉␉␉len--;␊
149␉␉␉index++;␊
150␉␉}␊
151␉}␊
152␉␉␊
153␉if(!NEEDS_PATCHING) return;␉// No need to apply a patch, hardware doesn't need it␊
154␉␊
155␉int version = 0;␊
156␉//int length = *((int*)lengthtmp);␊
157␉mkext_basic_header* package = packagetmp;␊
158␊
159␉// Verify the MKext.␊
160 if (( MKEXT_GET_MAGIC(package)␉␉!= MKEXT_MAGIC ) ||␊
161 ( MKEXT_GET_SIGNATURE(package)␉!= MKEXT_SIGN ) ||␊
162 ( MKEXT_GET_LENGTH(package)␉␉> kLoadSize )␉ ||␊
163 ( MKEXT_GET_CHECKSUM(package) !=␊
164␉␉ Mkext_Alder32((unsigned char *)&package->version, MKEXT_GET_LENGTH(package) - 0x10) ) )␊
165 {␊
166 return;␊
167␉␉// Don't try to patch a b␊
168 }␉␊
169␉␊
170␉/*␊
171␉if(strcmp(filespec, "/System/Library/Caches/com.apple.kext.caches/Startup/Extensions.mkext") == 0)␊
172␉{␊
173␉␉printf("Invalidating mkext %s\n", filespec);␊
174␉␉// 10.6 cache folder. Doesn't contain certain extensions we need, so invalidate it.␊
175␉␉//package->adler32++;␊
176␉␉// NOTE: double check that this is needed␊
177␉␉package->magic = 0x00;␊
178␉␉return;␊
179␉}*/␊
180␉␊
181␉␊
182␉version = MKEXT_GET_VERSION(package);␊
183␉␊
184␉if(version == 0x01008000) // mkext1␊
185␉{␊
186␉␉// mkext1 uses lzss␊
187␉␉mkext1_header* package = packagetmp;␊
188␉␉int i;␊
189␉␉for(i = 0; i < MKEXT_GET_COUNT(package); i++)␊
190␉␉{␊
191␉␉␉DBG("Parsing kext %d\n", i);␊
192␉␉␉//mkext_kext* kext = MKEXT1_GET_KEXT(package, i);␊
193␉␉␉// uses decompress_lzss␊
194␉␉␉// TODO: handle kext␊
195␊
196␉␉}␊
197␉}␊
198␉else if((version & 0xFFFF0000) == 0x02000000) // mkext2␊
199␉{␊
200␉␉DBG("Mkext2 package located at 0x%X\n", package);␊
201␊
202␉␉// mkext2 uses zlib␉␉␊
203␉␉mkext2_header* package = packagetmp;␊
204␉␉z_stream zstream;␊
205␉␉bool zstream_inited = false;␊
206␉␉int zlib_result;␊
207␉␉int plist_offset = MKEXT2_GET_PLIST(package);␊
208␉␉␊
209␉␉char* plist = malloc(MKEXT2_GET_PLIST_FULLSIZE(package));␊
210␉␉␊
211␉␉bzero(&zstream, sizeof(zstream));␉␉␊
212␉␉zstream.next_in = (UInt8*)((char*)package + plist_offset);␊
213␉␉zstream.avail_in = MKEXT2_GET_PLIST_COMPSIZE(package);␊
214␉␉␊
215␉␉zstream.next_out = (UInt8*)plist;␊
216␉␉zstream.avail_out = MKEXT2_GET_PLIST_FULLSIZE(package);␊
217␉␉␊
218␉␉zstream.zalloc = z_alloc;␊
219␉␉zstream.zfree = z_free;␊
220␉␉␉␉␊
221␉␉zlib_result = inflateInit(&zstream);␊
222␉␉if (Z_OK != zlib_result)␊
223␉␉{␊
224␉␉␉printf("ZLIB Error: %s\n", zstream.msg);␊
225␉␉␉getc();␊
226␉␉}␊
227␉␉else ␊
228␉␉{␊
229␉␉␉zstream_inited = true;␊
230␉␉}␊
231␊
232␉␉␊
233␉␉zlib_result = inflate(&zstream, Z_FINISH);␊
234␉␉if (zstream_inited) inflateEnd(&zstream);␊
235␊
236␉␉DBG("Inflated result is %d, in: %d bytes, out: %d bytes\n", zlib_result, zstream.total_in, zstream.total_out);␊
237␉␉if (zlib_result == Z_STREAM_END || zlib_result == Z_OK)␊
238␉␉{␉␉␉␊
239␉␉␉config_file_t plistData;␊
240␉␉␉config_file_t allDicts;␊
241␉␉␉bzero(&plistData, sizeof(plistData));␊
242␉␉␉bzero(&allDicts, sizeof(allDicts));␊
243␉␉␉␊
244␉␉␉XMLParseFile( plist, &plistData.dictionary );␊
245␊
246␉␉␉int count = 0;␊
247␊
248␉␉␉allDicts.dictionary = XMLGetProperty(plistData.dictionary, kMKEXTInfoDictionariesKey);␊
249␉␉␉count = XMLTagCount(allDicts.dictionary);␊
250␊
251␉␉␉DBG("Plist contains %d kexts\n", count);␊
252␉␉␉␊
253␉␉␉␊
254␉␉␉bool patched = false;␊
255␉␉␉for(; count--; count > 0)␊
256␉␉␉{␊
257␉␉␉␉TagPtr kextEntry = XMLGetElement(allDicts.dictionary, count);␊
258␉␉␉␉patched |= patch_kext(kextEntry, plist, package);␊
259␉␉␉}␊
260␉␉␉␊
261␊
262␉␉␉if(patched)␊
263␉␉␉{␊
264␉␉␉␉zstream_inited = false;␊
265␉␉␉␉// Recompress the plist␊
266␉␉␉␉bzero(&zstream, sizeof(zstream));␉␉␊
267␉␉␉␉zstream.next_in = (UInt8*)plist;␊
268␉␉␉␉zstream.next_out = (UInt8*)package + plist_offset;␊
269␉␉␉␉zstream.avail_in = MKEXT2_GET_PLIST_FULLSIZE(package);␊
270␉␉␉␉zstream.avail_out = MKEXT2_GET_PLIST_FULLSIZE(package)<<2;␉// Give us some extra free space, just in case␊
271␉␉␉␉zstream.zalloc = Z_NULL;␊
272␉␉␉␉zstream.zfree = Z_NULL;␊
273␉␉␉␉zstream.opaque = Z_NULL;␊
274␉␉␉␉␊
275␉␉␉␉␊
276␉␉␉␉zlib_result = deflateInit2(&zstream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,15, 8 /* memLevel */, Z_DEFAULT_STRATEGY);␊
277␉␉␉␉if (Z_OK != zlib_result) {␊
278␉␉␉␉␉printf("ZLIB Deflate Error: %s\n", zstream.msg);␊
279␉␉␉␉␉getc();␊
280␉␉␉␉}␊
281␉␉␉␉else ␊
282␉␉␉␉{␊
283␉␉␉␉␉zstream_inited = true;␊
284␉␉␉␉}␊
285␉␉␉␉␊
286␉␉␉␉zlib_result = deflate(&zstream, Z_FINISH);␊
287␉␉␉␉␊
288␉␉␉␉if (zlib_result == Z_STREAM_END)␊
289␉␉␉␉{␊
290␉␉␉␉␉DBG("Deflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, MKEXT2_GET_PLIST_FULLSIZE(package));␊
291␉␉␉␉} ␊
292␉␉␉␉else if (zlib_result == Z_OK)␊
293␉␉␉␉{␊
294␉␉␉␉␉/* deflate filled output buffer, meaning the data doesn't compress.␊
295␉␉␉␉␉ */␊
296␉␉␉␉␉DBG("Deflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, MKEXT2_GET_PLIST_FULLSIZE(package));␊
297␉␉␉␉␉␊
298␉␉␉␉} ␊
299␉␉␉␉else if (zlib_result != Z_STREAM_ERROR)␊
300␉␉␉␉{␊
301␉␉␉␉␉printf("ZLIB Deflate Error: %s\n", zstream.msg);␊
302␉␉␉␉␉getc();␊
303␉␉␉␉}␊
304␉␉␉␉␊
305␉␉␉␉if(zstream.total_out != MKEXT2_GET_PLIST_COMPSIZE(package))␊
306␉␉␉␉{␊
307␉␉␉␉␉// Update the mkext length␊
308␉␉␉␉␉MKEXT2_HDR_CAST(package)->length = MKEXT_SWAP(MKEXT_GET_LENGTH(package) - MKEXT2_GET_PLIST_COMPSIZE(package) + zstream.total_out);␊
309␉␉␉␉␉MKEXT2_HDR_CAST(package)->plist_compressed_size = MKEXT_SWAP(zstream.total_out);␊
310␉␉␉␉␉*((int*)lengthtmp) -= MKEXT2_GET_PLIST_COMPSIZE(package);␊
311␉␉␉␉␉*((int*)lengthtmp) += zstream.total_out;␊
312␉␉␉␉}␊
313␉␉␉␉␉␉␉␉␊
314␉␉␉␉if (zstream_inited) deflateEnd(&zstream);␊
315␉␉␉␉␊
316␉␉␉␉␊
317␉␉␉␉␊
318␉␉␉␉// re alder32 the new mkext2 package␊
319␉␉␉␉MKEXT_HDR_CAST(package)->adler32 = ␊
320␉␉␉␉␉MKEXT_SWAP(Mkext_Alder32((unsigned char *)&package->version,␊
321␉␉␉␉␉␉␉␉␉␉␉ MKEXT_GET_LENGTH(package) - 0x10));␊
322␉␉␉}␊
323␉␉}␊
324␉␉else␊
325␉␉{␊
326␉␉␉printf("ZLIB Error: %s\n", zstream.msg);␊
327␉␉␉getc();␊
328␉␉}␊
329␊
330␉␉//config_file_t mkextPlist;␊
331␉␉//ParseXMLFile((char*) plist, &mkextPlist.dictionary);␊
332␉␉␊
333␉␉␊
334␉␉␊
335␉␉␊
336␉␉␊
337␉␉/*␉␉int i;␊
338␉␉for(i = 0; i < MKEXT_GET_COUNT(package); i++)␊
339␉␉{␊
340␉␉␉printf("Parsing kext %d\n", i);␊
341␉␉}␊
342␉␉*/␊
343␉␉␊
344␊
345␉}␊
346␊
347␉␊
348␉DBG("Loading %s, version 0x%x\n", filespec, version);␊
349␉//getc();␊
350}␊
351␊
352// FIXME: only handles mkext2 entries␊
353bool patch_kext(TagPtr plist, char* plistbuffer, void* start)␊
354{␊
355␉char* bundleID;␊
356␉␊
357␉if(XMLGetProperty(plist, kMKEXTExecutableKey) == NULL) return false;␉// Kext is a plist only kext, don't patch␊
358␉␊
359␉bundleID = XMLCastString(XMLGetProperty(plist, kPropCFBundleIdentifier));␊
360␉␊
361␉␊
362␉if(patch_gma_deviceid &&␊
363␉ (␊
364␉␉␉(strcmp(bundleID, "com.apple.driver.AppleIntelGMA950") == 0) ||␊
365␉␉␉(strcmp(bundleID, "com.apple.driver.AppleIntelIntegratedFramebuffer") == 0)␊
366␉␉ )␊
367␉ )␊
368␉{␊
369␉␉if(strcmp(bundleID, "com.apple.driver.AppleIntelIntegratedFramebuffer") == 0 || patch_gma_deviceid == 0x27ae)␊
370␉␉{␊
371␉␉␉return patch_gma_kexts(plist, plistbuffer, start);␊
372␉␉}␊
373␉␉else␊
374␉␉{␊
375␉␉␉␊
376␉␉}␊
377␊
378␉}␊
379␉else if(patch_bcm_deviceid && (strcmp(bundleID, "com.apple.driver.AirPortBrcm43xx") == 0))␊
380␉{␊
381␉␉return patch_bcm_kext(plist, plistbuffer, start);␊
382␊
383␉}␊
384␉else if(patch_hda_codec && strcmp(bundleID, "com.apple.driver.AppleHDA") == 0)␊
385␉{␊
386␉␉//return patch_hda_kext(plist, plistbuffer, start);␊
387␊
388␉}␊
389␉/*␊
390␉else if(patch_hda_codec && strcmp(bundleID, "com.apple.driver.AppleHDAController") == 0)␊
391␉{␊
392␉␉return patch_hda_controller(plist, plistbuffer, start);␊
393␊
394␉}␊
395␉*/␊
396␉return false;␊
397}␊
398␊
399void KextPatcher_hook(void* arg1, void* arg2, void* arg3, void* arg4)␊
400{␊
401␉pci_dt_t* current = arg1;␊
402␉if(current)␊
403␉{␊
404␉␉switch(current->class_id)␊
405␉␉{␊
406␉␉␉case PCI_CLASS_DISPLAY_VGA:␊
407␉␉␉␉if(current->vendor_id == 0x8086 && ␊
408␉␉␉␉ (␊
409␉␉␉␉␉current->device_id == 0x27AE ||␊
410␉␉␉␉␉current->device_id == 0xA001 ||␊
411␉␉␉␉␉current->device_id == 0xA002 ||␊
412␉␉␉␉␉current->device_id == 0xA011 ||␊
413␉␉␉␉␉current->device_id == 0xA012␊
414␊
415␉␉␉␉␉)␊
416␉␉␉␉ )␊
417␉␉␉␉{␊
418␉␉␉␉␉patch_gma_deviceid = current->device_id;␊
419␉␉␉␉}␊
420␉␉␉␉break;␊
421␉␉␉␉␊
422␉␉␉case PCI_CLASS_NETWORK_OTHER:␊
423␉␉␉␉␊
424␉␉␉␉// Patch BCM43xx␊
425␉␉␉␉if(current->vendor_id == 0x14E4 && ((current->device_id & 0xFF00) == 0x4300))␊
426␉␉␉␉{␊
427␉␉␉␉␉patch_bcm_deviceid = current->device_id;␊
428␉␉␉␉}␊
429␉␉␉␉break;␊
430␉␉}␊
431␉}␊
432}␊
433␊
434␊
435bool patch_hda_controller(TagPtr plist, char* plistbuffer, void* start)␊
436{␊
437␉return false;␊
438␉// change the PCI class code to match to. Note: A LegacyHDA plist should do this on it's own␊
439␉// As such, it's disabled␊
440␊
441␉// TODO: read class code␊
442␉TagPtr personality;␊
443␉personality =␉␉XMLCastDict(XMLGetProperty(plist, kPropIOKitPersonalities));␊
444␉personality =␉␉XMLGetProperty(personality, (const char*)"BuiltInHDA");␉␊
445␉TagPtr match_class =XMLCastArray(XMLGetProperty(personality, (const char*)"IOPCIClassMatch"));␊
446␉␊
447␉␊
448␉char* new_str = malloc(strlen("0xXXXX000&0xFFFE0000")+1);␊
449␉sprintf(new_str, "0x04030000&amp;0xFFFE0000"); // todo, pass in actual class id␊
450␉␊
451␉␊
452␉char* orig_string = "0x04020000&amp;0xFFFE0000"; //XMLCastString(match_class);␊
453␉␊
454␉DBG("Attemting to replace '%s' with '%s'\n", orig_string, new_str);␊
455␉␊
456␉// TODO: verify string doesn't exist first.␊
457␉␊
458␉replace_string(orig_string, new_str, plistbuffer + XMLCastStringOffset(match_class), 10240);␊
459␉␊
460␉return true;␊
461␉␊
462}␊
463␊
464␊
465bool patch_hda_kext(TagPtr plist, char* plistbuffer, void* start)␊
466{␊
467␉uint16_t find_codec = 0;␊
468␉int full_size, compressed_size, executable_offset;␊
469␉void* compressed_data;␊
470␉mkext2_file_entry* kext;␊
471␉int zlib_result;␊
472␉z_stream zstream;␊
473␉bool zstream_inited = false;␊
474␊
475␉switch(0xFF00 & patch_hda_codec)␊
476␉{␊
477␉␉case 0x0200:␊
478␉␉␉find_codec = 0x0262;␊
479␉␉␉break;␊
480␊
481␉␉case 0x0800:␊
482␉␉␉find_codec = 0x0885;␊
483␉␉␉break;␊
484␉␉␉␊
485␉␉case 0x0600:␉// specificaly the 662␊
486␉␉␉find_codec = 0x0885;␊
487␉␉␉break;␊
488␉}␊
489␉␊
490␉if(!find_codec) return false;␉// notify caller that we aren't patching the kext␊
491␊
492␉␉␊
493␉executable_offset = XMLCastInteger(XMLGetProperty(plist, kMKEXTExecutableKey));␊
494␉kext = (void*)((char*)start + executable_offset);␊
495␊
496␉full_size = MKEXT2_GET_ENTRY_FULLSIZE(kext);␊
497␉compressed_size = MKEXT2_GET_ENTRY_COMPSIZE(kext);␊
498␉compressed_data = MKEXT2_GET_ENTRY_DATA(kext);␉␊
499␉executable_offset = XMLCastInteger(XMLGetProperty(plist, kMKEXTExecutableKey));␊
500␉␊
501␉␊
502␉char* executable = malloc(full_size);␊
503␉␊
504␉bzero(&zstream, sizeof(zstream));␉␉␊
505␉zstream.next_in = (UInt8*)compressed_data;␊
506␉zstream.avail_in = compressed_size;␊
507␉␊
508␉zstream.next_out = (UInt8*)executable;␊
509␉zstream.avail_out = full_size;␊
510␉␊
511␉zstream.zalloc = z_alloc;␊
512␉zstream.zfree = z_free;␊
513␉␊
514␉zlib_result = inflateInit(&zstream);␊
515␉if (Z_OK != zlib_result)␊
516␉{␊
517␉␉printf("ZLIB Inflate Error: %s\n", zstream.msg);␊
518␉␉getc();␊
519␉}␊
520␉else ␊
521␉{␊
522␉␉zstream_inited = true;␊
523␉}␊
524␉␊
525␉␊
526␉zlib_result = inflate(&zstream, Z_FINISH);␊
527␉␊
528␉DBG("Inflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, full_size);␊
529␉␉␊
530␉replace_word(0x10EC | (find_codec << 16), 0xE10EC | (patch_hda_codec << 16), executable, zstream.total_out);␊
531␉␊
532␉if (zstream_inited) inflateEnd(&zstream);␊
533␉␊
534␉␊
535␉zstream.next_in = (UInt8*)executable;␊
536␉zstream.next_out = (UInt8*)compressed_data;␊
537␉␊
538␉zstream.avail_in = full_size;␊
539␉zstream.avail_out = compressed_size;␊
540␉zstream.zalloc = Z_NULL;␊
541␉zstream.zfree = Z_NULL;␊
542␉zstream.opaque = Z_NULL;␊
543␉␊
544␉␊
545␉␊
546␉// Recompress the eecutable␊
547␉zlib_result = deflateInit2(&zstream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,15, 8 /* memLevel */, Z_DEFAULT_STRATEGY);␊
548␉if (Z_OK != zlib_result) {␊
549␉␉printf("ZLIB Deflate Error: %s\n", zstream.msg);␊
550␉␉getc();␊
551␉}␊
552␉else ␊
553␉{␊
554␉␉zstream_inited = true;␊
555␉}␊
556␉␊
557␉zlib_result = deflate(&zstream, Z_FINISH);␊
558␉␊
559␉if (zlib_result == Z_STREAM_END)␊
560␉{␊
561␉␉DBG("Deflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, full_size);␊
562␉} ␊
563␉else if (zlib_result == Z_OK)␊
564␉{␊
565␉␉/* deflate filled output buffer, meaning the data doesn't compress.␊
566␉␉ */␊
567␉␉DBG("Deflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, full_size);␊
568␉␉␊
569␉} ␊
570␉else if (zlib_result != Z_STREAM_ERROR)␊
571␉{␊
572␉␉printf("ZLIB Deflate Error: %s\n", zstream.msg);␊
573␉␉getc();␊
574␉}␊
575␉␊
576␉if (zstream_inited) deflateEnd(&zstream);␊
577␉␊
578␉free(executable);␊
579␉␊
580␉return true;␉␊
581␊
582}␊
583␊
584bool patch_bcm_kext(TagPtr plist, char* plistbuffer, void* start)␊
585{␊
586␉TagPtr personality;␊
587␉personality =␉␉XMLCastDict(XMLGetProperty(plist, kPropIOKitPersonalities));␊
588␉personality =␉␉XMLGetProperty(personality, (const char*)"Broadcom 802.11 PCI");␉␊
589␉TagPtr match_names =XMLCastArray(XMLGetProperty(personality, (const char*)"IONameMatch"));␊
590␊
591␉␊
592␉char* new_str = malloc(strlen("pci14e4,xxxx")+1);␊
593␉sprintf(new_str, "pci14e4,%02x", patch_bcm_deviceid);␊
594␊
595␉// Check to see if we *really* need to modify the plist, if not, return false␊
596␉// so that *if* this were going ot be the only modified kext, the repacking code␊
597␉// won't need to be executed.␊
598␉int count = XMLTagCount(match_names);␊
599␉while(count)␊
600␉{␊
601␉␉count--;␊
602␉␉TagPtr replace =␉XMLGetElement(match_names, count);␉// Modify the second entry␊
603␉␉char* orig_string = XMLCastString(replace);␊
604␉␉if(strcmp(orig_string, new_str) == 0) return false;␊
605␉}␊
606␊
607␉␊
608␉TagPtr replace =␉XMLGetElement(match_names, 1);␉// Modify the second entry␊
609␉char* orig_string = XMLCastString(replace);␊
610␉␊
611␉␊
612␉// TODO: verify string doesn't exist first.␊
613␉␊
614␉replace_string(orig_string, new_str, plistbuffer + XMLCastStringOffset(replace), 10240);␊
615␊
616␉return true;␊
617}␊
618␊
619bool patch_gma_kexts(TagPtr plist, char* plistbuffer, void* start)␊
620{␊
621␉int exeutable_offset, full_size, compressed_size;␊
622␉TagPtr personality;␊
623␉long offset;␊
624␉int zlib_result;␊
625␉z_stream zstream;␊
626␉bool zstream_inited = false;␊
627␉mkext2_file_entry* kext;␊
628␉void* compressed_data;␊
629␊
630␉exeutable_offset = XMLCastInteger(XMLGetProperty(plist, kMKEXTExecutableKey));␊
631␉kext = (void*)((char*)start + exeutable_offset);␊
632␊
633␉full_size = MKEXT2_GET_ENTRY_FULLSIZE(kext);␊
634␉compressed_size = MKEXT2_GET_ENTRY_COMPSIZE(kext);␊
635␉compressed_data = MKEXT2_GET_ENTRY_DATA(kext);␊
636␉␊
637␉personality =␉␉XMLCastDict(XMLGetProperty(plist, kPropIOKitPersonalities));␊
638␉if(XMLGetProperty(personality, (const char*)"Intel915"))␊
639␉{␊
640␉␉personality =␉␉XMLGetProperty(personality, (const char*)"Intel915");␊
641␉}␊
642␉else␊
643␉{␊
644␉␉personality =␉␉XMLGetProperty(personality, (const char*)"AppleIntelIntegratedFramebuffer");␉␊
645␉}␊
646#if DEBUG_KEXT_PATCHER␊
647␉char* pcimatch =␉XMLCastString(XMLGetProperty(personality, (const char*)"IOPCIPrimaryMatch"));␊
648#endif␊
649␉offset =␉␉XMLCastStringOffset(XMLGetProperty(personality, (const char*)"IOPCIPrimaryMatch"));␊
650␉␊
651␉char* newstring = malloc(strlen("0x27A28086") + 1);␊
652␉sprintf(newstring, "0x%04x", 0x8086 | (patch_gma_deviceid << 16));␊
653␉␊
654␉DBG("Replacing %s with %s\n", "0x27A28086", newstring); ␊
655␉replace_string("0x27A28086", newstring, plistbuffer + offset, 10240);␊
656␉␊
657␉char* executable = malloc(full_size);␊
658␉␊
659␉bzero(&zstream, sizeof(zstream));␉␉␊
660␉zstream.next_in = (UInt8*)compressed_data;␊
661␉zstream.avail_in = compressed_size;␊
662␉␊
663␉zstream.next_out = (UInt8*)executable;␊
664␉zstream.avail_out = full_size;␊
665␉␊
666␉zstream.zalloc = z_alloc;␊
667␉zstream.zfree = z_free;␊
668␉␊
669␉zlib_result = inflateInit(&zstream);␊
670␉if (Z_OK != zlib_result)␊
671␉{␊
672␉␉printf("ZLIB Inflate Error: %s\n", zstream.msg);␊
673␉␉getc();␊
674␉}␊
675␉else ␊
676␉{␊
677␉␉zstream_inited = true;␊
678␉}␊
679␉␊
680␉␊
681␉zlib_result = inflate(&zstream, Z_FINISH);␊
682␉␊
683␉printf("Inflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, full_size);␊
684␉␊
685␉replace_word(0x27A28086, 0x8086 | (patch_gma_deviceid << 16), executable, zstream.total_out);␊
686␊
687␉␊
688␉if(patch_gma_deviceid & 0xFF00 == 0xA000)␉// GMA3150␊
689␉{␊
690␉␉// Cursor corruption fix.␊
691␉␉// This patch changes the cursor address from␊
692␉␉// a physical address (used in the gma950) to an offset (used in the gma3150).␊
693␊
694␉␉char find_bytes[] = {0x8b, 0x55, 0x08, 0x83, 0xba, 0xb0, 0x00, 0x00, 0x00, 0x01, 0x7e, 0x36, 0x89, 0x04, 0x24, 0xe8, 0x32, 0xbb, 0xff, 0xff};␉// getPhysicalAddress() and more␊
695␉␉char new_bytes[] = {0xb8, 0x00, 0x00, 0x00, 0x02, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0xEB, 0x04, 0x00, 0x00, 0x00, 0x00};␉// jump past getPhysicalAddress binding. NOTE: last six bytes are unusable␊
696␉␉replace_bytes(find_bytes, sizeof(find_bytes), new_bytes, sizeof(new_bytes), executable, zstream.total_out);␊
697␉}␊
698␉␊
699␉if (zstream_inited) inflateEnd(&zstream);␊
700␉␊
701␉␊
702␉zstream.next_in = (UInt8*)executable;␊
703␉zstream.next_out = (UInt8*)compressed_data;␊
704␉␊
705␉zstream.avail_in = full_size;␊
706␉zstream.avail_out = compressed_size;␊
707␉zstream.zalloc = Z_NULL;␊
708␉zstream.zfree = Z_NULL;␊
709␉zstream.opaque = Z_NULL;␊
710␉␊
711␉␊
712␉␊
713␉// Recompress the eecutable␊
714␉zlib_result = deflateInit2(&zstream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,15, 8 /* memLevel */, Z_DEFAULT_STRATEGY);␊
715␉if (Z_OK != zlib_result) {␊
716␉␉printf("ZLIB Deflate Error: %s\n", zstream.msg);␊
717␉␉getc();␊
718␉}␊
719␉else ␊
720␉{␊
721␉␉zstream_inited = true;␊
722␉}␊
723␉␊
724␉zlib_result = deflate(&zstream, Z_FINISH);␊
725␉␊
726␉if (zlib_result == Z_STREAM_END)␊
727␉{␊
728␉␉DBG("Deflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, full_size);␊
729␉} ␊
730␉else if (zlib_result == Z_OK)␊
731␉{␊
732␉␉/* deflate filled output buffer, meaning the data doesn't compress.␊
733␉␉ */␊
734␉␉printf("Deflated result is %d, in: %d bytes, out: %d bytes, full: %d\n", zlib_result, zstream.total_in, zstream.total_out, full_size);␊
735␉␉prinff("ERROR: Unable to compress patched kext, not enough room.\n");␊
736␉␉pause();␊
737␉␉␊
738␉} ␊
739␉else if (zlib_result != Z_STREAM_ERROR)␊
740␉{␊
741␉␉printf("ZLIB Deflate Error: %s\n", zstream.msg);␊
742␉␉getc();␊
743␉}␊
744␉//kext->compressed_size = MKEXT_SWAP(zstream.total_out);␊
745␊
746␉␊
747␉␊
748␉␊
749␉if (zstream_inited) deflateEnd(&zstream);␊
750␉␊
751␉free(executable);␊
752␉␊
753␉return true;␉␊
754}␊
755␊
756int chartohex(char c)␊
757{␊
758␉if(c <= '9' && c >= '0')␊
759␉{␊
760␉␉return c - '0';␉// c is between 0 and 9␊
761␉}␊
762␉else if(c <= 'F' && c >= 'A')␊
763␉{␊
764␉␉return c - 'A' + 10; // c = 10 - 15;␊
765␉}␊
766␉else if(c <= 'f' && c >= 'a')␊
767␉{␊
768␉␉return c - 'a' + 10; // c = 10 - 15;␊
769␉}␊
770␉return 0;␊
771}

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