1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "../bootloader.h"
18 #include "stdlib.h"
19 #include <stdint.h>
20 #include <fcntl.h>
21 #include "../mtdutils/mtdutils.h"
22 #include "rktools.h"
23 #include "log.h"
24 #include <errno.h>
25 #include <stdio.h>
26 #include <string.h>
27 #include <sys/stat.h>
28 #include <unistd.h>
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <fcntl.h>
32 #include <unistd.h>
33 #include <sys/reboot.h>
34
35 static char custom_cmdline_path[] = "/tmp/custom_cmdline";
36 // ------------------------------------
37 // for misc partitions on block devices
38 // ------------------------------------
wait_for_device(const char * fn)39 static void wait_for_device(const char* fn)
40 {
41 int tries = 0;
42 int ret;
43 struct stat buf;
44 do {
45 ++tries;
46 ret = stat(fn, &buf);
47 if (ret) {
48 LOGI("stat %s try %d: %s\n", fn, tries, strerror(errno));
49 sleep(1);
50 }
51 } while (ret && tries < 10);
52 if (ret) {
53 LOGW("failed to stat %s\n", fn);
54 }
55 }
56
57 static unsigned int iavb_crc32_tab[] = {
58 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
59 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
60 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
61 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
62 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
63 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
64 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
65 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
66 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
67 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
68 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
69 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
70 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
71 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
72 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
73 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
74 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
75 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
76 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
77 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
78 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
79 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
80 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
81 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
82 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
83 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
84 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
85 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
86 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
87 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
88 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
89 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
90 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
91 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
92 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
93 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
94 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
95 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
96 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
97 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
98 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
99 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
100 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
101 };
102
103 /* Converts a 32-bit unsigned integer from host to big-endian byte order. */
avb_htobe32(unsigned int in)104 static unsigned int avb_htobe32(unsigned int in)
105 {
106 union {
107 unsigned int word;
108 unsigned char bytes[4];
109 } ret;
110 ret.bytes[0] = (in >> 24) & 0xff;
111 ret.bytes[1] = (in >> 16) & 0xff;
112 ret.bytes[2] = (in >> 8) & 0xff;
113 ret.bytes[3] = in & 0xff;
114 return ret.word;
115 }
116
117 /*
118 * A function that calculates the CRC-32 based on the table above is
119 * given below for documentation purposes. An equivalent implementation
120 * of this function that's actually used in the kernel can be found
121 * in sys/libkern.h, where it can be inlined.
122 */
iavb_crc32(unsigned int crc_in,const unsigned char * buf,int size)123 static unsigned int iavb_crc32(unsigned int crc_in, const unsigned char* buf, int size)
124 {
125 const unsigned char* p = buf;
126 unsigned int crc;
127
128 crc = crc_in ^ ~0U;
129 while (size--)
130 crc = iavb_crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
131 return crc ^ ~0U;
132 }
133
avb_crc32(const unsigned char * buf,size_t size)134 static unsigned int avb_crc32(const unsigned char* buf, size_t size)
135 {
136 return iavb_crc32(0, buf, size);
137 }
138
AvbABData_update_crc(struct AvbABData * data)139 static void AvbABData_update_crc(struct AvbABData *data)
140 {
141 data->crc32 = avb_htobe32(avb_crc32((const unsigned char*)data, sizeof(struct AvbABData) - sizeof(unsigned int)));
142 }
143
writeMisc_mtd(char * buf,int offset,int size)144 static int writeMisc_mtd(char *buf, int offset, int size)
145 {
146 size_t page_size = 0;
147 mtd_scan_partitions();
148 const MtdPartition *part = mtd_find_partition_by_name(MISC_PARTITION_NAME_MTD);
149 if (part == NULL || mtd_partition_info(part, NULL, NULL, &page_size)) {
150 LOGE("Can't find %s\n", MISC_PARTITION_NAME_MTD);
151 return -1;
152 }
153
154 MtdReadContext *read = mtd_read_partition(part);
155 if (read == NULL) {
156 LOGE("Can't open %s\n(%s)\n", MISC_PARTITION_NAME_MTD, strerror(errno));
157 return -1;
158 }
159
160 size_t write_size = page_size * 10; //读取20个页，24k
161 char data[write_size];
162 ssize_t r = mtd_read_data(read, data, write_size);
163 if (r != write_size) LOGE("Can't read %s\n(%s)\n", MISC_PARTITION_NAME_MTD, strerror(errno));
164 mtd_read_close(read);
165 if (r != write_size) return -1;
166
167 memcpy(&data[offset], buf, size);
168
169 MtdWriteContext *write = mtd_write_partition(part);
170 if (write == NULL) {
171 LOGE("Can't open %s\n(%s)\n", MISC_PARTITION_NAME_MTD, strerror(errno));
172 return -1;
173 }
174
175 if (mtd_write_data(write, data, write_size) != write_size) {
176 LOGE("Can't write %s\n(%s)\n", MISC_PARTITION_NAME_MTD, strerror(errno));
177 mtd_write_close(write);
178 return -1;
179 }
180 if (mtd_write_close(write)) {
181 LOGE("Can't finish %s\n(%s)\n", MISC_PARTITION_NAME_MTD, strerror(errno));
182 return -1;
183 }
184
185 return 0;
186 }
187
readMisc_mtd(char * buf,int offset,int size)188 static int readMisc_mtd(char *buf, int offset, int size)
189 {
190 size_t page_size;
191 memset(buf, 0, size);
192 mtd_scan_partitions();
193 const MtdPartition *part = mtd_find_partition_by_name(MISC_PARTITION_NAME_MTD);
194 if (part == NULL || mtd_partition_info(part, NULL, NULL, &page_size)) {
195 LOGE("Can't find %s\n", MISC_PARTITION_NAME_MTD);
196 return -1;
197 }
198
199 MtdReadContext *read = mtd_read_partition(part);
200 if (read == NULL) {
201 LOGE("Can't open %s\n(%s)\n", MISC_PARTITION_NAME_MTD, strerror(errno));
202 return -1;
203 }
204 size_t write_size = page_size * 10; //读取20个页，24k
205 char data[write_size];
206 ssize_t r = mtd_read_data(read, data, write_size);
207 if (r != write_size) LOGE("Can't read %s\n(%s)\n", MISC_PARTITION_NAME_MTD, strerror(errno));
208 mtd_read_close(read);
209 if (r != write_size) return -1;
210
211 memcpy(buf, &data[offset], size);
212 return 0;
213 }
214
writeMisc_block(char * buf,int offset,int size)215 static int writeMisc_block(char *buf, int offset, int size)
216 {
217 FILE* f = fopen(MISC_PARTITION_NAME_BLOCK, "wb");
218 if (f == NULL) {
219 LOGE("Can't open %s\n(%s)\n", MISC_PARTITION_NAME_BLOCK, strerror(errno));
220 return -1;
221 }
222 fseek(f, offset, SEEK_SET);
223 int count = fwrite(buf, sizeof(char), size, f);
224 if (count != size) {
225 LOGE("Failed writing %s\n(%s)\n", MISC_PARTITION_NAME_BLOCK, strerror(errno));
226 return -1;
227 }
228 if (fclose(f) != 0) {
229 LOGE("Failed closing %s\n(%s)\n", MISC_PARTITION_NAME_BLOCK, strerror(errno));
230 return -1;
231 }
232 return 0;
233 }
234
readMisc_block(char * buf,int offset,int size)235 static int readMisc_block(char *buf, int offset, int size)
236 {
237 wait_for_device(MISC_PARTITION_NAME_BLOCK);
238 FILE* f = fopen(MISC_PARTITION_NAME_BLOCK, "rb");
239 if (f == NULL) {
240 LOGE("Can't open %s\n(%s)\n", MISC_PARTITION_NAME_BLOCK, strerror(errno));
241 return -1;
242 }
243
244 fseek(f, offset, SEEK_SET);
245
246 int count = fread(buf, sizeof(char), size, f);
247 if (count != size) {
248 LOGE("Failed reading %s\n(%s)\n", MISC_PARTITION_NAME_BLOCK, strerror(errno));
249 return -1;
250 }
251 if (fclose(f) != 0) {
252 LOGE("Failed closing %s\n(%s)\n", MISC_PARTITION_NAME_BLOCK, strerror(errno));
253 return -1;
254 }
255 return 0;
256
257 }
258
writeMisc(char * buf,int offset,int size)259 static int writeMisc(char *buf, int offset, int size)
260 {
261 if (isMtdDevice()) {
262 return writeMisc_mtd(buf, offset, size);
263 } else {
264 return writeMisc_block(buf, offset, size);
265 }
266 }
267
readMisc(char * buf,int offset,int size)268 static int readMisc(char *buf, int offset, int size)
269 {
270 if (isMtdDevice()) {
271 return readMisc_mtd(buf, offset, size);
272 } else {
273 return readMisc_block(buf, offset, size);
274 }
275 }
276
277 /**
278 * 往misc 偏移4k处写入格式化命令
279 */
writeCmdMisc(char * cmdline,int size)280 static int writeCmdMisc(char *cmdline, int size)
281 {
282 return writeMisc(cmdline, MISC_OFFSET_CMDLINE, strlen(cmdline));
283 }
284
285 /**
286 * 读misc 偏移4K处格式化命令
287 */
readCmdMisc(char * cmdline,int size)288 static int readCmdMisc(char *cmdline, int size)
289 {
290 return readMisc(cmdline, MISC_OFFSET_CMDLINE, size);
291 }
292
293 /**
294 * 从misc 偏移2k处读取引导信息
295 */
readABMisc(struct AvbABData * info)296 static int readABMisc(struct AvbABData* info)
297 {
298 return readMisc((char *)info, MISC_OFFSET, sizeof(struct AvbABData));
299 }
300
301 /**
302 * 往misc 偏移2k处写入引导信息
303 */
writeABMisc(struct AvbABData * info)304 static int writeABMisc(struct AvbABData *info)
305 {
306 return writeMisc((char *)info, MISC_OFFSET, sizeof(struct AvbABData));
307 }
308
309 /**
310 * 往misc 偏移16k位置处读取recovery信息
311 */
get_bootloader_message(struct bootloader_message * out)312 int get_bootloader_message(struct bootloader_message *out)
313 {
314 return readMisc((char *)out, BOOTLOADER_MESSAGE_OFFSET_IN_MISC, sizeof(struct bootloader_message));
315 }
316
317 /**
318 * 往misc 偏移16k位置写入recovery信息
319 */
320
set_bootloader_message(const struct bootloader_message * in)321 int set_bootloader_message(const struct bootloader_message *in)
322 {
323 return writeMisc((char*)in, BOOTLOADER_MESSAGE_OFFSET_IN_MISC, sizeof(struct bootloader_message));
324 }
325
avb_safe_memcmp(const void * s1,const void * s2,size_t n)326 int avb_safe_memcmp(const void* s1, const void* s2, size_t n)
327 {
328 const unsigned char* us1 = (const unsigned char *)s1;
329 const unsigned char* us2 = (const unsigned char *)s2;
330 int result = 0;
331
332 if (0 == n) {
333 return 0;
334 }
335
336 /*
337 * Code snippet without data-dependent branch due to Nate Lawson
338 * (nate@root.org) of Root Labs.
339 */
340 while (n--) {
341 result |= *us1++ ^ *us2++;
342 }
343
344 return result != 0;
345 }
346 /**
347 * 设置当前分区为可启动分区
348 */
setSlotSucceed()349 int setSlotSucceed()
350 {
351 int now_slot = getCurrentSlot();
352 if (now_slot == -1) {
353 return -1;
354 }
355 struct AvbABData info;
356 if (readABMisc(&info) == -1) {
357 return -1;
358 }
359
360 for (size_t i = 0; i < 4; i++) {
361 LOGI("info.mafic is %x\n", info.magic[i]);
362 }
363 if (avb_safe_memcmp(info.magic, AVB_AB_MAGIC, AVB_AB_MAGIC_LEN) != 0) {
364 LOGE("Magic is incorrect.\n");
365 return false;
366 }
367 if (info.slots[now_slot].priority != AVB_AB_MAX_PRIORITY) {
368 /* Something could be wrong, correct it because this slot is bootable */
369 LOGW("Warning: current slot priorty is %d != %d, Correct it!\n",
370 info.slots[now_slot].priority, AVB_AB_MAX_PRIORITY);
371 info.slots[now_slot].priority = AVB_AB_MAX_PRIORITY;
372 }
373 #ifdef SUCCESSFUL_BOOT
374 info.slots[now_slot].tries_remaining = 0;
375 info.slots[now_slot].successful_boot = 1;
376 #endif
377 #ifdef RETRY_BOOT
378 info.slots[now_slot].tries_remaining = AVB_AB_MAX_TRIES_REMAINING;
379 /* Clear suc boot flag anyway. Because it's chance that an older slot
380 * used succ mode without this patch applied, while the other one
381 * (new OTA slot) uses tries mode. We need to make sure not to confuse
382 * u-boot, otherwise this slot will be unbootable.
383 */
384 info.slots[now_slot].successful_boot = 0;
385 #endif
386 info.last_boot = now_slot;
387
388 AvbABData_update_crc(&info);
389
390 if (writeABMisc(&info) != 0) {
391 return -1;
392 }
393 return 0;
394 }
395
396 /**
397 * 设置升级分区, 即另外一个分区优先级最高
398 */
setSlotActivity()399 int setSlotActivity()
400 {
401 int now_slot = getCurrentSlot();
402 if (now_slot == -1) {
403 return -1;
404 }
405 struct AvbABData info;
406
407 if (readABMisc(&info) == -1) {
408 return -1;
409 }
410
411 info.slots[now_slot].priority = AVB_AB_MAX_PRIORITY - 1;
412 info.slots[1 - now_slot].priority = AVB_AB_MAX_PRIORITY;
413 info.slots[1 - now_slot].tries_remaining = AVB_AB_MAX_TRIES_REMAINING;
414 /* When switch to another slot, assume it is not suc boot, try it out! */
415 info.slots[1 - now_slot].successful_boot = 0;
416
417 AvbABData_update_crc(&info);
418
419 if (writeABMisc(&info) != 0) {
420 return -1;
421 }
422 return 0;
423 }
424
425
426
427 /**
428 *格式化userdata_data
429 */
wipe_userdata(int auto_reboot)430 int wipe_userdata(int auto_reboot)
431 {
432 int slot = -1;
433 slot = getCurrentSlot();
434 if (-1 == slot) {
435 //写MISC
436 struct bootloader_message msg;
437 memset(&msg, 0, sizeof(msg));
438 char recovery_str[] = "recovery\n--wipe_all";
439 strcpy(msg.command, "boot-recovery");
440 sprintf(msg.recovery, "%s\n", recovery_str);
441 set_bootloader_message(&msg);
442 return 0;
443 }
444 if (writeCmdMisc((char *)CMD_WIPE_USERDATA, sizeof(CMD_WIPE_USERDATA)) != 0) {
445 return -1;
446 }
447
448 if (auto_reboot) {
449 LOGI("auto reboot, %s.\n", CMD_WIPE_USERDATA);
450 sleep(1);
451 reboot(RB_AUTOBOOT);
452 }
453 return 0;
454 }
455
456 /* CustomCmdline struct = len + data */
writeCustomMisc(char * cmdline,int size)457 static int writeCustomMisc(char *cmdline, int size)
458 {
459 return writeMisc(cmdline, MISC_OFFSET_CUSTOM, size);
460 }
461
readCustomMisc(char * cmdline,int size)462 static int readCustomMisc(char *cmdline, int size)
463 {
464 return readMisc(cmdline, MISC_OFFSET_CUSTOM, size);
465 }
466
readCustomMiscCmdline(void)467 int readCustomMiscCmdline(void)
468 {
469 uint16_t len;
470 uint8_t *buf;
471 int fd, ret = 0;
472
473 fd = open(custom_cmdline_path, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR);
474 if (fd == -1) {
475 LOGE("ERROR: Can't open %s\n", custom_cmdline_path);
476 return -1;
477 }
478
479 readCustomMisc((char *)&len, 2);
480 if (len > 1022) {
481 LOGE("ERROR: cmdline is too bigger than 1K (%d)\n", len);
482 ret = -1;
483 goto out;
484 }
485
486 if (!len) {
487 LOGE("ERROR: len is 0\n");
488 ret = -1;
489 goto out;
490 }
491
492 buf = (uint8_t *)malloc(len + 2);
493 if (!buf) {
494 LOGE("ERROR: failed to malloc buf for cmdline\n");
495 ret = -1;
496 goto out;
497 }
498
499 readCustomMisc((char *)buf, len + 2);
500
501 if (ftruncate(fd, 0) == -1) {
502 LOGW("ERROR :failed to ftruncate");
503 }
504 lseek(fd, 0, SEEK_SET);
505 ret = write(fd, &buf[2], len);
506 if (ret == len) {
507 ret = 0;
508 } else {
509 LOGE("ERROR: failed to write %s (%d)\n", custom_cmdline_path, ret);
510 ret = -1;
511 }
512
513 free(buf);
514 out:
515 close(fd);
516 return ret;
517 }
518
writeCustomMiscCmdline(void)519 int writeCustomMiscCmdline(void)
520 {
521 uint16_t len;
522 uint8_t *buf;
523 int fd, ret = 0;
524
525 fd = open(custom_cmdline_path, O_RDONLY);
526 if (fd == -1) {
527 LOGE("ERROR: Can't open %s\n", custom_cmdline_path);
528 return -1;
529 }
530
531 lseek(fd, 0, SEEK_SET);
532 ret = read(fd, (uint8_t *)&len, 2);
533 if (ret != 2) {
534 LOGE("ERROR: failed to read %s\n", custom_cmdline_path);
535 ret = -1;
536 goto out;
537 }
538
539 LOGI("len = %d\n", len);
540 buf = (uint8_t *)malloc(len + 2);
541 if (!buf) {
542 LOGE("ERROR: failed to malloc buf for cmdline\n");
543 ret = -1;
544 goto out;
545 }
546
547 memcpy(buf, &len, 2);
548 ret = read(fd, &buf[2], len);
549 if (ret == len) {
550 ret = 0;
551 } else {
552 LOGE("ERROR: failed to read %s\n", custom_cmdline_path);
553 ret = -1;
554 goto out1;
555 }
556
557 writeCustomMisc((char *)buf, len + 2);
558 out1:
559 free(buf);
560 out:
561 close(fd);
562 return ret;
563 }
564
cleanCustomMiscCmdline(void)565 int cleanCustomMiscCmdline(void)
566 {
567 uint8_t buf[1024];
568
569 memset(buf, 0, 1024);
570 return writeCustomMisc((char *)buf, 1024);
571 }
572
573 /*
574 * 显示MISC 分区的所有内容，方便调试
575 */
miscDisplay()576 void miscDisplay()
577 {
578 // 显示A/B 分区的misc 信息
579 LOGI("===============Linux A/B=============\n");
580 struct AvbABData info_ab;
581 readABMisc(&info_ab);
582 LOGI("magic : %s.\n", info_ab.magic);
583 LOGI("version_major = %d.\n", info_ab.version_major);
584 LOGI("version_minor = %d.\n", info_ab.version_minor);
585 for (int i = 0; i < 2; i++) {
586 LOGI("slot.[%d]->priority = %d.\n", i, info_ab.slots[i].priority);
587 LOGI("slot.[%d]->successful_boot = %d.\n", i, info_ab.slots[i].successful_boot);
588 LOGI("slot.[%d]->tries_remaining = %d.\n", i, info_ab.slots[i].tries_remaining);
589 }
590
591 LOGI("last_boot : %d.\n", info_ab.last_boot);
592 LOGI("calculate crc32: %x.\n", avb_htobe32(avb_crc32((const unsigned char*)&info_ab, sizeof(struct AvbABData) - sizeof(unsigned int))));
593 LOGI("local crc32: %x.\n", info_ab.crc32);
594 LOGI("sizeof(struct AvbABData) = %ld\n", sizeof(struct AvbABData));
595
596 // 显示格式化信息
597 LOGI("==============wipe================\n");
598 // 显示recovery 的misc 信息
599 char cmdline[20];
600 readCmdMisc(cmdline, sizeof(cmdline));
601 LOGI("cmdline = %s.\n", cmdline);
602 LOGI("==============recovery============\n");
603
604 struct bootloader_message boot;
605 get_bootloader_message(&boot);
606 LOGI("bootloader.command = %s.\n", boot.command);
607 LOGI("bootloader.recovery = %s.\n", boot.recovery);
608 LOGI("bootloader.status = %s.\n", boot.status);
609 LOGI("bootloader.needupdate = %x.\n", *((int *)boot.needupdate));
610 LOGI("bootloader.systemFlag = %s.\n", boot.systemFlag);
611 }
612