1 // SPDX-License-Identifier: GPL-2.0+
8 #include <image-android-dt.h>
9 #include <android_image.h>
12 #include <asm/unaligned.h>
14 #include <linux/libfdt.h>
16 #define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000
18 static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];
20 static ulong checksum(const unsigned char *buffer, ulong size)
24 for (ulong i = 0; i < size; i++)
29 static bool is_trailer_present(ulong bootconfig_end_addr)
31 return !strncmp((char *)(bootconfig_end_addr - BOOTCONFIG_MAGIC_SIZE),
32 BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_SIZE);
35 static ulong add_trailer(ulong bootconfig_start_addr, ulong bootconfig_size)
40 if (!bootconfig_start_addr)
45 end = bootconfig_start_addr + bootconfig_size;
46 if (is_trailer_present(end))
49 memcpy((void *)(end), &bootconfig_size, BOOTCONFIG_SIZE_SIZE);
50 sum = checksum((unsigned char *)bootconfig_start_addr, bootconfig_size);
51 memcpy((void *)(end + BOOTCONFIG_SIZE_SIZE), &sum,
52 BOOTCONFIG_CHECKSUM_SIZE);
53 memcpy((void *)(end + BOOTCONFIG_SIZE_SIZE + BOOTCONFIG_CHECKSUM_SIZE),
54 BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_SIZE);
56 return BOOTCONFIG_TRAILER_SIZE;
59 static void android_boot_image_v3_v4_parse_hdr(const struct andr_boot_img_hdr_v3 *hdr,
60 struct andr_image_data *data)
64 data->kcmdline = hdr->cmdline;
65 data->header_version = hdr->header_version;
68 * The header takes a full page, the remaining components are aligned
72 end += ANDR_GKI_PAGE_SIZE;
73 data->kernel_ptr = end;
74 data->kernel_size = hdr->kernel_size;
75 end += ALIGN(hdr->kernel_size, ANDR_GKI_PAGE_SIZE);
76 data->ramdisk_ptr = end;
77 data->ramdisk_size = hdr->ramdisk_size;
78 data->boot_ramdisk_size = hdr->ramdisk_size;
79 end += ALIGN(hdr->ramdisk_size, ANDR_GKI_PAGE_SIZE);
81 if (hdr->header_version > 3)
82 end += ALIGN(hdr->signature_size, ANDR_GKI_PAGE_SIZE);
84 data->boot_img_total_size = end - (ulong)hdr;
87 static void android_vendor_boot_image_v3_v4_parse_hdr(const struct andr_vnd_boot_img_hdr
88 *hdr, struct andr_image_data *data)
93 * The header takes a full page, the remaining components are aligned
96 data->kcmdline_extra = hdr->cmdline;
97 data->tags_addr = hdr->tags_addr;
98 data->image_name = hdr->name;
99 data->kernel_addr = hdr->kernel_addr;
100 data->ramdisk_addr = hdr->ramdisk_addr;
101 data->dtb_load_addr = hdr->dtb_addr;
102 data->bootconfig_size = hdr->bootconfig_size;
104 end += hdr->page_size;
105 if (hdr->vendor_ramdisk_size) {
106 data->vendor_ramdisk_ptr = end;
107 data->vendor_ramdisk_size = hdr->vendor_ramdisk_size;
108 data->ramdisk_size += hdr->vendor_ramdisk_size;
109 end += ALIGN(hdr->vendor_ramdisk_size, hdr->page_size);
113 data->dtb_size = hdr->dtb_size;
115 end += ALIGN(hdr->dtb_size, hdr->page_size);
116 end += ALIGN(hdr->vendor_ramdisk_table_size, hdr->page_size);
117 data->bootconfig_addr = end;
118 if (hdr->bootconfig_size) {
119 data->bootconfig_size += add_trailer(data->bootconfig_addr,
120 data->bootconfig_size);
121 data->ramdisk_size += data->bootconfig_size;
123 end += ALIGN(data->bootconfig_size, hdr->page_size);
124 data->vendor_boot_img_total_size = end - (ulong)hdr;
127 static void android_boot_image_v0_v1_v2_parse_hdr(const struct andr_boot_img_hdr_v0 *hdr,
128 struct andr_image_data *data)
132 data->image_name = hdr->name;
133 data->kcmdline = hdr->cmdline;
134 data->kernel_addr = hdr->kernel_addr;
135 data->ramdisk_addr = hdr->ramdisk_addr;
136 data->header_version = hdr->header_version;
137 data->dtb_load_addr = hdr->dtb_addr;
142 * The header takes a full page, the remaining components are aligned
146 end += hdr->page_size;
148 data->kernel_ptr = end;
149 data->kernel_size = hdr->kernel_size;
150 end += ALIGN(hdr->kernel_size, hdr->page_size);
152 data->ramdisk_ptr = end;
153 data->ramdisk_size = hdr->ramdisk_size;
154 end += ALIGN(hdr->ramdisk_size, hdr->page_size);
156 data->second_ptr = end;
157 data->second_size = hdr->second_size;
158 end += ALIGN(hdr->second_size, hdr->page_size);
160 if (hdr->header_version >= 1) {
161 data->recovery_dtbo_ptr = end;
162 data->recovery_dtbo_size = hdr->recovery_dtbo_size;
163 end += ALIGN(hdr->recovery_dtbo_size, hdr->page_size);
166 if (hdr->header_version >= 2) {
168 data->dtb_size = hdr->dtb_size;
169 end += ALIGN(hdr->dtb_size, hdr->page_size);
172 data->boot_img_total_size = end - (ulong)hdr;
175 bool android_image_get_data(const void *boot_hdr, const void *vendor_boot_hdr,
176 struct andr_image_data *data)
178 if (!boot_hdr || !data) {
179 printf("boot_hdr or data params can't be NULL\n");
183 if (!is_android_boot_image_header(boot_hdr)) {
184 printf("Incorrect boot image header\n");
188 if (((struct andr_boot_img_hdr_v0 *)boot_hdr)->header_version > 2) {
189 if (!vendor_boot_hdr) {
190 printf("For boot header v3+ vendor boot image has to be provided\n");
193 if (!is_android_vendor_boot_image_header(vendor_boot_hdr)) {
194 printf("Incorrect vendor boot image header\n");
197 android_boot_image_v3_v4_parse_hdr(boot_hdr, data);
198 android_vendor_boot_image_v3_v4_parse_hdr(vendor_boot_hdr, data);
200 android_boot_image_v0_v1_v2_parse_hdr(boot_hdr, data);
206 static ulong android_image_get_kernel_addr(struct andr_image_data *img_data)
209 * All the Android tools that generate a boot.img use this
210 * address as the default.
212 * Even though it doesn't really make a lot of sense, and it
213 * might be valid on some platforms, we treat that adress as
214 * the default value for this field, and try to execute the
215 * kernel in place in such a case.
217 * Otherwise, we will return the actual value set by the user.
219 if (img_data->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
220 return img_data->kernel_ptr;
223 * abootimg creates images where all load addresses are 0
224 * and we need to fix them.
226 if (img_data->kernel_addr == 0 && img_data->ramdisk_addr == 0)
227 return env_get_ulong("kernel_addr_r", 16, 0);
229 return img_data->kernel_addr;
233 * android_image_get_kernel() - processes kernel part of Android boot images
234 * @hdr: Pointer to boot image header, which is at the start
236 * @vendor_boot_img: Pointer to vendor boot image header, which is at the
237 * start of the image.
238 * @verify: Checksum verification flag. Currently unimplemented.
239 * @os_data: Pointer to a ulong variable, will hold os data start
241 * @os_len: Pointer to a ulong variable, will hold os data length.
243 * This function returns the os image's start address and length. Also,
244 * it appends the kernel command line to the bootargs env variable.
246 * Return: Zero, os start address and length on success,
247 * otherwise on failure.
249 int android_image_get_kernel(const void *hdr,
250 const void *vendor_boot_img, int verify,
251 ulong *os_data, ulong *os_len)
253 struct andr_image_data img_data = {0};
255 const struct legacy_img_hdr *ihdr;
257 if (!android_image_get_data(hdr, vendor_boot_img, &img_data))
260 kernel_addr = android_image_get_kernel_addr(&img_data);
261 ihdr = (const struct legacy_img_hdr *)img_data.kernel_ptr;
264 * Not all Android tools use the id field for signing the image with
265 * sha1 (or anything) so we don't check it. It is not obvious that the
266 * string is null terminated so we take care of this.
268 strlcpy(andr_tmp_str, img_data.image_name, ANDR_BOOT_NAME_SIZE);
269 andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
270 if (strlen(andr_tmp_str))
271 printf("Android's image name: %s\n", andr_tmp_str);
273 printf("Kernel load addr 0x%08x size %u KiB\n",
274 kernel_addr, DIV_ROUND_UP(img_data.kernel_size, 1024));
277 if (*img_data.kcmdline) {
278 printf("Kernel command line: %s\n", img_data.kcmdline);
279 len += strlen(img_data.kcmdline);
282 if (img_data.kcmdline_extra) {
283 printf("Kernel extra command line: %s\n", img_data.kcmdline_extra);
284 len += strlen(img_data.kcmdline_extra);
287 char *bootargs = env_get("bootargs");
289 len += strlen(bootargs);
291 char *newbootargs = malloc(len + 2);
293 puts("Error: malloc in android_image_get_kernel failed!\n");
299 strcpy(newbootargs, bootargs);
300 strcat(newbootargs, " ");
303 if (*img_data.kcmdline)
304 strcat(newbootargs, img_data.kcmdline);
306 if (img_data.kcmdline_extra) {
307 strcat(newbootargs, " ");
308 strcat(newbootargs, img_data.kcmdline_extra);
311 env_set("bootargs", newbootargs);
314 if (image_get_magic(ihdr) == IH_MAGIC) {
315 *os_data = image_get_data(ihdr);
317 *os_data = img_data.kernel_ptr;
321 if (image_get_magic(ihdr) == IH_MAGIC)
322 *os_len = image_get_data_size(ihdr);
324 *os_len = img_data.kernel_size;
329 bool is_android_vendor_boot_image_header(const void *vendor_boot_img)
331 return !memcmp(VENDOR_BOOT_MAGIC, vendor_boot_img, ANDR_VENDOR_BOOT_MAGIC_SIZE);
334 bool is_android_boot_image_header(const void *hdr)
336 return !memcmp(ANDR_BOOT_MAGIC, hdr, ANDR_BOOT_MAGIC_SIZE);
339 ulong android_image_get_end(const struct andr_boot_img_hdr_v0 *hdr,
340 const void *vendor_boot_img)
342 struct andr_image_data img_data;
344 if (!android_image_get_data(hdr, vendor_boot_img, &img_data))
347 if (img_data.header_version > 2)
350 return img_data.boot_img_total_size;
353 ulong android_image_get_kload(const void *hdr,
354 const void *vendor_boot_img)
356 struct andr_image_data img_data;
358 if (!android_image_get_data(hdr, vendor_boot_img, &img_data))
361 return android_image_get_kernel_addr(&img_data);
364 ulong android_image_get_kcomp(const void *hdr,
365 const void *vendor_boot_img)
367 struct andr_image_data img_data;
370 if (!android_image_get_data(hdr, vendor_boot_img, &img_data))
373 p = (const void *)img_data.kernel_ptr;
374 if (image_get_magic((struct legacy_img_hdr *)p) == IH_MAGIC)
375 return image_get_comp((struct legacy_img_hdr *)p);
376 else if (get_unaligned_le32(p) == LZ4F_MAGIC)
379 return image_decomp_type(p, sizeof(u32));
382 int android_image_get_ramdisk(const void *hdr, const void *vendor_boot_img,
383 ulong *rd_data, ulong *rd_len)
385 struct andr_image_data img_data = {0};
388 if (!android_image_get_data(hdr, vendor_boot_img, &img_data))
391 if (!img_data.ramdisk_size) {
392 *rd_data = *rd_len = 0;
395 if (img_data.header_version > 2) {
396 ramdisk_ptr = img_data.ramdisk_addr;
397 memcpy((void *)(ramdisk_ptr), (void *)img_data.vendor_ramdisk_ptr,
398 img_data.vendor_ramdisk_size);
399 ramdisk_ptr += img_data.vendor_ramdisk_size;
400 memcpy((void *)(ramdisk_ptr), (void *)img_data.ramdisk_ptr,
401 img_data.boot_ramdisk_size);
402 ramdisk_ptr += img_data.boot_ramdisk_size;
403 if (img_data.bootconfig_size) {
405 (ramdisk_ptr), (void *)img_data.bootconfig_addr,
406 img_data.bootconfig_size);
410 printf("RAM disk load addr 0x%08lx size %u KiB\n",
411 img_data.ramdisk_addr, DIV_ROUND_UP(img_data.ramdisk_size, 1024));
413 *rd_data = img_data.ramdisk_addr;
415 *rd_len = img_data.ramdisk_size;
419 int android_image_get_second(const void *hdr, ulong *second_data, ulong *second_len)
421 struct andr_image_data img_data;
423 if (!android_image_get_data(hdr, NULL, &img_data))
426 if (img_data.header_version > 2) {
427 printf("Second stage bootloader is only supported for boot image version <= 2\n");
431 if (!img_data.second_size) {
432 *second_data = *second_len = 0;
436 *second_data = img_data.second_ptr;
438 printf("second address is 0x%lx\n",*second_data);
440 *second_len = img_data.second_size;
445 * android_image_get_dtbo() - Get address and size of recovery DTBO image.
446 * @hdr_addr: Boot image header address
447 * @addr: If not NULL, will contain address of recovery DTBO image
448 * @size: If not NULL, will contain size of recovery DTBO image
450 * Get the address and size of DTBO image in "Recovery DTBO" area of Android
451 * Boot Image in RAM. The format of this image is Android DTBO (see
452 * corresponding "DTB/DTBO Partitions" AOSP documentation for details). Once
453 * the address is obtained from this function, one can use 'adtimg' U-Boot
454 * command or android_dt_*() functions to extract desired DTBO blob.
456 * This DTBO (included in boot image) is only needed for non-A/B devices, and it
457 * only can be found in recovery image. On A/B devices we can always rely on
458 * "dtbo" partition. See "Including DTBO in Recovery for Non-A/B Devices" in
459 * AOSP documentation for details.
461 * Return: true on success or false on error.
463 bool android_image_get_dtbo(ulong hdr_addr, ulong *addr, u32 *size)
465 const struct andr_boot_img_hdr_v0 *hdr;
469 hdr = map_sysmem(hdr_addr, sizeof(*hdr));
470 if (!is_android_boot_image_header(hdr)) {
471 printf("Error: Boot Image header is incorrect\n");
476 if (hdr->header_version != 1 && hdr->header_version != 2) {
477 printf("Error: header version must be >= 1 and <= 2 to get dtbo\n");
482 if (hdr->recovery_dtbo_size == 0) {
483 printf("Error: recovery_dtbo_size is 0\n");
488 /* Calculate the address of DTB area in boot image */
489 dtbo_img_addr = hdr_addr;
490 dtbo_img_addr += hdr->page_size;
491 dtbo_img_addr += ALIGN(hdr->kernel_size, hdr->page_size);
492 dtbo_img_addr += ALIGN(hdr->ramdisk_size, hdr->page_size);
493 dtbo_img_addr += ALIGN(hdr->second_size, hdr->page_size);
496 *addr = dtbo_img_addr;
498 *size = hdr->recovery_dtbo_size;
506 * android_image_get_dtb_img_addr() - Get the address of DTB area in boot image.
507 * @hdr_addr: Boot image header address
508 * @vhdr_addr: Vendor Boot image header address
509 * @addr: Will contain the address of DTB area in boot image
511 * Return: true on success or false on fail.
513 static bool android_image_get_dtb_img_addr(ulong hdr_addr, ulong vhdr_addr, ulong *addr)
515 const struct andr_boot_img_hdr_v0 *hdr;
516 const struct andr_vnd_boot_img_hdr *v_hdr;
520 hdr = map_sysmem(hdr_addr, sizeof(*hdr));
521 if (!is_android_boot_image_header(hdr)) {
522 printf("Error: Boot Image header is incorrect\n");
527 if (hdr->header_version < 2) {
528 printf("Error: header_version must be >= 2 to get dtb\n");
533 if (hdr->header_version == 2) {
534 if (!hdr->dtb_size) {
535 printf("Error: dtb_size is 0\n");
539 /* Calculate the address of DTB area in boot image */
540 dtb_img_addr = hdr_addr;
541 dtb_img_addr += hdr->page_size;
542 dtb_img_addr += ALIGN(hdr->kernel_size, hdr->page_size);
543 dtb_img_addr += ALIGN(hdr->ramdisk_size, hdr->page_size);
544 dtb_img_addr += ALIGN(hdr->second_size, hdr->page_size);
545 dtb_img_addr += ALIGN(hdr->recovery_dtbo_size, hdr->page_size);
547 *addr = dtb_img_addr;
550 if (hdr->header_version > 2) {
551 v_hdr = map_sysmem(vhdr_addr, sizeof(*v_hdr));
552 if (!v_hdr->dtb_size) {
553 printf("Error: dtb_size is 0\n");
558 /* Calculate the address of DTB area in boot image */
559 dtb_img_addr = vhdr_addr;
560 dtb_img_addr += v_hdr->page_size;
561 if (v_hdr->vendor_ramdisk_size)
562 dtb_img_addr += ALIGN(v_hdr->vendor_ramdisk_size, v_hdr->page_size);
563 *addr = dtb_img_addr;
573 * android_image_get_dtb_by_index() - Get address and size of blob in DTB area.
574 * @hdr_addr: Boot image header address
575 * @vendor_boot_img: Pointer to vendor boot image header, which is at the start of the image.
576 * @index: Index of desired DTB in DTB area (starting from 0)
577 * @addr: If not NULL, will contain address to specified DTB
578 * @size: If not NULL, will contain size of specified DTB
580 * Get the address and size of DTB blob by its index in DTB area of Android
583 * Return: true on success or false on error.
585 bool android_image_get_dtb_by_index(ulong hdr_addr, ulong vendor_boot_img,
586 u32 index, ulong *addr, u32 *size)
588 struct andr_image_data img_data;
589 const struct andr_boot_img_hdr_v0 *hdr;
590 const struct andr_vnd_boot_img_hdr *vhdr;
592 hdr = map_sysmem(hdr_addr, sizeof(*hdr));
593 if (vendor_boot_img != -1)
594 vhdr = map_sysmem(vendor_boot_img, sizeof(*vhdr));
595 if (!android_image_get_data(hdr, vhdr, &img_data)) {
596 if (vendor_boot_img != -1)
601 if (vendor_boot_img != -1)
605 ulong dtb_img_addr; /* address of DTB part in boot image */
606 u32 dtb_img_size; /* size of DTB payload in boot image */
607 ulong dtb_addr; /* address of DTB blob with specified index */
608 u32 i; /* index iterator */
610 android_image_get_dtb_img_addr(hdr_addr, vendor_boot_img, &dtb_img_addr);
611 /* Check if DTB area of boot image is in DTBO format */
612 if (android_dt_check_header(dtb_img_addr)) {
613 return android_dt_get_fdt_by_index(dtb_img_addr, index, addr,
617 /* Find out the address of DTB with specified index in concat blobs */
618 dtb_img_size = img_data.dtb_size;
620 dtb_addr = dtb_img_addr;
621 while (dtb_addr < dtb_img_addr + dtb_img_size) {
622 const struct fdt_header *fdt;
625 fdt = map_sysmem(dtb_addr, sizeof(*fdt));
626 if (fdt_check_header(fdt) != 0) {
628 printf("Error: Invalid FDT header for index %u\n", i);
632 dtb_size = fdt_totalsize(fdt);
643 dtb_addr += dtb_size;
647 printf("Error: Index is out of bounds (%u/%u)\n", index, i);
651 #if !defined(CONFIG_SPL_BUILD)
653 * android_print_contents - prints out the contents of the Android format image
654 * @hdr: pointer to the Android format image header
656 * android_print_contents() formats a multi line Android image contents
658 * The routine prints out Android image properties
661 * no returned results
663 void android_print_contents(const struct andr_boot_img_hdr_v0 *hdr)
665 if (hdr->header_version >= 3) {
666 printf("Content print is not supported for boot image header version > 2");
669 const char * const p = IMAGE_INDENT_STRING;
670 /* os_version = ver << 11 | lvl */
671 u32 os_ver = hdr->os_version >> 11;
672 u32 os_lvl = hdr->os_version & ((1U << 11) - 1);
674 printf("%skernel size: %x\n", p, hdr->kernel_size);
675 printf("%skernel address: %x\n", p, hdr->kernel_addr);
676 printf("%sramdisk size: %x\n", p, hdr->ramdisk_size);
677 printf("%sramdisk address: %x\n", p, hdr->ramdisk_addr);
678 printf("%ssecond size: %x\n", p, hdr->second_size);
679 printf("%ssecond address: %x\n", p, hdr->second_addr);
680 printf("%stags address: %x\n", p, hdr->tags_addr);
681 printf("%spage size: %x\n", p, hdr->page_size);
682 /* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C)
683 * lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) */
684 printf("%sos_version: %x (ver: %u.%u.%u, level: %u.%u)\n",
686 (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
687 (os_lvl >> 4) + 2000, os_lvl & 0x0F);
688 printf("%sname: %s\n", p, hdr->name);
689 printf("%scmdline: %s\n", p, hdr->cmdline);
690 printf("%sheader_version: %d\n", p, hdr->header_version);
692 if (hdr->header_version >= 1) {
693 printf("%srecovery dtbo size: %x\n", p,
694 hdr->recovery_dtbo_size);
695 printf("%srecovery dtbo offset: %llx\n", p,
696 hdr->recovery_dtbo_offset);
697 printf("%sheader size: %x\n", p,
701 if (hdr->header_version == 2) {
702 printf("%sdtb size: %x\n", p, hdr->dtb_size);
703 printf("%sdtb addr: %llx\n", p, hdr->dtb_addr);
708 * android_image_print_dtb_info - Print info for one DTB blob in DTB area.
710 * @index: Number of DTB blob in DTB area.
712 * Return: true on success or false on error.
714 static bool android_image_print_dtb_info(const struct fdt_header *fdt,
720 const char *compatible;
722 root_node_off = fdt_path_offset(fdt, "/");
723 if (root_node_off < 0) {
724 printf("Error: Root node not found\n");
728 fdt_size = fdt_totalsize(fdt);
729 compatible = fdt_getprop(fdt, root_node_off, "compatible",
731 model = fdt_getprop(fdt, root_node_off, "model", NULL);
733 printf(" - DTB #%u:\n", index);
734 printf(" (DTB)size = %d\n", fdt_size);
735 printf(" (DTB)model = %s\n", model ? model : "(unknown)");
736 printf(" (DTB)compatible = %s\n",
737 compatible ? compatible : "(unknown)");
743 * android_image_print_dtb_contents() - Print info for DTB blobs in DTB area.
744 * @hdr_addr: Boot image header address
746 * DTB payload in Android Boot Image v2+ can be in one of following formats:
747 * 1. Concatenated DTB blobs
748 * 2. Android DTBO format (see CONFIG_CMD_ADTIMG for details)
750 * This function does next:
751 * 1. Prints out the format used in DTB area
752 * 2. Iterates over all DTB blobs in DTB area and prints out the info for
755 * Return: true on success or false on error.
757 bool android_image_print_dtb_contents(ulong hdr_addr)
759 const struct andr_boot_img_hdr_v0 *hdr;
761 ulong dtb_img_addr; /* address of DTB part in boot image */
762 u32 dtb_img_size; /* size of DTB payload in boot image */
763 ulong dtb_addr; /* address of DTB blob with specified index */
764 u32 i; /* index iterator */
766 res = android_image_get_dtb_img_addr(hdr_addr, 0, &dtb_img_addr);
770 /* Check if DTB area of boot image is in DTBO format */
771 if (android_dt_check_header(dtb_img_addr)) {
772 printf("## DTB area contents (DTBO format):\n");
773 android_dt_print_contents(dtb_img_addr);
777 printf("## DTB area contents (concat format):\n");
779 /* Iterate over concatenated DTB blobs */
780 hdr = map_sysmem(hdr_addr, sizeof(*hdr));
781 dtb_img_size = hdr->dtb_size;
784 dtb_addr = dtb_img_addr;
785 while (dtb_addr < dtb_img_addr + dtb_img_size) {
786 const struct fdt_header *fdt;
789 fdt = map_sysmem(dtb_addr, sizeof(*fdt));
790 if (fdt_check_header(fdt) != 0) {
792 printf("Error: Invalid FDT header for index %u\n", i);
796 res = android_image_print_dtb_info(fdt, i);
802 dtb_size = fdt_totalsize(fdt);
804 dtb_addr += dtb_size;