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bootimg-info.c
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bootimg-info.c
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#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "bootimg.h"
int usage()
{
printf("usage: bootimg-info boot.img\n");
return 1;
}
void print_os_version(uint32_t hdr_os_ver)
{
int a = 0, b = 0, c = 0, y = 0, m = 0;
if (hdr_os_ver != 0) {
int os_version = 0, os_patch_level = 0;
os_version = hdr_os_ver >> 11;
os_patch_level = hdr_os_ver&0x7ff;
a = (os_version >> 14)&0x7f;
b = (os_version >> 7)&0x7f;
c = os_version&0x7f;
y = (os_patch_level >> 4) + 2000;
m = os_patch_level&0xf;
}
if ((a < 128) && (b < 128) && (c < 128) && (y >= 2000) && (y < 2128) && (m > 0) && (m <= 12)) {
printf(" os_version : %d.%d.%-5d (%08x)\n", a, b, c, hdr_os_ver);
printf(" (os_patch_level) : %d-%02d\n", y, m);
} else {
printf(" unused : %-10d (%08x)\n", hdr_os_ver, hdr_os_ver);
}
}
void print_id(boot_img_hdr_v2 *hdr)
{
int SHA256_DIGEST_SIZE = 32;
uint8_t id[SHA256_DIGEST_SIZE];
memcpy(&id, hdr->id, sizeof(id));
printf(" id : ");
int i;
for (i = 0; i < SHA256_DIGEST_SIZE; ++i) {
printf("%02hhx", id[i]);
}
printf("\n\n");
}
int main(int argc, char** argv)
{
char *filename = NULL;
argc--;
if (argc > 0) {
char *val = argv[1];
filename = val;
}
if (filename == NULL) {
return usage();
}
FILE *f = fopen(filename, "rb");
if (!f) {
printf("bootimg-info: File not found!\n");
return 1;
}
char tmp[BOOT_MAGIC_SIZE];
char *magic = NULL;
int i;
int seeklimit = 65536; // arbitrary byte limit to search in input file for boot image magic
for (i = 0; i <= seeklimit; i++) {
fseek(f, i, SEEK_SET);
if(fread(tmp, BOOT_MAGIC_SIZE, 1, f)){};
if (memcmp(tmp, BOOT_MAGIC, BOOT_MAGIC_SIZE) == 0) {
magic = BOOT_MAGIC;
break;
}
if (memcmp(tmp, VENDOR_BOOT_MAGIC, VENDOR_BOOT_MAGIC_SIZE) == 0) {
magic = VENDOR_BOOT_MAGIC;
break;
}
}
if (i > seeklimit) {
printf("bootimg-info: No boot image magic found!\n");
return 1;
}
printf(" Android Boot Image Info Utility\n\n");
printf(" Printing information for \"%s\":\n\n", filename);
printf(" header:\n");
boot_img_hdr_v4 header;
fseek(f, i, SEEK_SET);
if(fread(&header, sizeof(header), 1, f)){};
int hdr_ver_max = 8; // arbitrary maximum header version value; when greater assume the field is appended dt size
int base = 0;
if (!strcmp(magic, BOOT_MAGIC)) {
if ((header.header_version < 3) || (header.header_version > hdr_ver_max)) {
// boot_img_hdr_v2 in the backported header supports all boot_img_hdr versions and cross-compatible variants below 3
fseek(f, i, SEEK_SET);
boot_img_hdr_v2 header;
if(fread(&header, sizeof(header), 1, f)){};
base = header.kernel_addr - 0x00008000;
printf(" magic : ANDROID!\n");
printf(" kernel_size : %-10d (%08x)\n", header.kernel_size, header.kernel_size);
printf(" kernel_addr : 0x%08x\n\n", header.kernel_addr);
printf(" ramdisk_size : %-10d (%08x)\n", header.ramdisk_size, header.ramdisk_size);
printf(" ramdisk_addr : 0x%08x\n", header.ramdisk_addr);
printf(" second_size : %-10d (%08x)\n", header.second_size, header.second_size);
printf(" second_addr : 0x%08x\n\n", header.second_addr);
printf(" tags_addr : 0x%08x\n", header.tags_addr);
printf(" page_size : %-10d (%08x)\n", header.page_size, header.page_size);
if (header.dt_size > hdr_ver_max) {
printf(" dt_size : %-10d (%08x)\n", header.dt_size, header.dt_size);
} else {
printf(" header_version : %-10d (%08x)\n", header.header_version, header.header_version);
}
print_os_version(header.os_version); printf("\n");
printf(" name : %s\n\n", header.name);
printf(" cmdline : %.*s\n\n", BOOT_ARGS_SIZE, header.cmdline);
print_id(&header);
printf(" extra_cmdline : %.*s\n\n", BOOT_EXTRA_ARGS_SIZE, header.extra_cmdline);
if (header.header_version <= hdr_ver_max) {
if (header.header_version > 0) {
printf(" recovery_dtbo_size : %-10d (%08x)\n", header.recovery_dtbo_size, header.recovery_dtbo_size);
printf(" recovery_dtbo_offset : %-10"PRId64" (%016"PRIx64")\n", header.recovery_dtbo_offset, header.recovery_dtbo_offset);
printf(" header_size : %-10d (%08x)\n\n", header.header_size, header.header_size);
}
if (header.header_version > 1) {
printf(" dtb_size : %-10d (%08x)\n", header.dtb_size, header.dtb_size);
printf(" dtb_addr : 0x%08"PRIx64" (%016"PRIx64")\n\n", header.dtb_addr, header.dtb_addr);
}
}
printf(" Other:\n");
printf(" magic offset : %-10d (%08x)\n\n", i, i);
printf(" base address : 0x%08x\n\n", base);
printf(" kernel offset : 0x%08x\n", header.kernel_addr - base);
printf(" ramdisk offset : 0x%08x\n", header.ramdisk_addr - base);
printf(" second offset : 0x%08x\n", header.second_addr - base);
printf(" tags offset : 0x%08x\n", header.tags_addr - base);
if (header.header_version <= hdr_ver_max && header.header_version > 1) {
printf(" dtb offset : 0x%08"PRIx64"\n", header.dtb_addr - base);
}
} else {
// boot_img_hdr_v3 and above are no longer backwards compatible
printf(" magic : ANDROID!\n");
printf(" kernel_size : %-10d (%08x)\n", header.kernel_size, header.kernel_size);
printf(" ramdisk_size : %-10d (%08x)\n\n", header.ramdisk_size, header.ramdisk_size);
print_os_version(header.os_version);
printf(" header_size : %-10d (%08x)\n", header.header_size, header.header_size);
printf(" reserved[1] : %-10d (%08x)\n", header.reserved[0], header.reserved[0]);
printf(" reserved[2] : %-10d (%08x)\n\n", header.reserved[1], header.reserved[1]);
printf(" reserved[3] : %-10d (%08x)\n", header.reserved[2], header.reserved[2]);
printf(" reserved[4] : %-10d (%08x)\n", header.reserved[3], header.reserved[3]);
printf(" header_version : %-10d (%08x)\n", header.header_version, header.header_version);
printf(" cmdline : %.*s\n", BOOT_ARGS_SIZE+BOOT_EXTRA_ARGS_SIZE, header.cmdline);
if (header.header_version > 3) {
printf(" signature_size : %-10d (%08x)\n", header.signature_size, header.signature_size);
}
printf("\n");
printf(" Other:\n");
printf(" magic offset : %-10d (%08x)\n", i, i);
}
} else {
// vendor_boot_img_hdr started at v3 and is not cross-compatible with boot_img_hdr
fseek(f, i, SEEK_SET);
vendor_boot_img_hdr_v4 header;
if(fread(&header, sizeof(header), 1, f)){};
vendor_ramdisk_table_entry_v4 rdt_entry;
int rdt_offset;
int bc_offset;
if (header.header_version > 3) {
rdt_offset = ((header.header_size + header.page_size - 1) / header.page_size
+ (header.vendor_ramdisk_size + header.page_size - 1) / header.page_size
+ (header.dtb_size + header.page_size - 1) / header.page_size) * header.page_size;
bc_offset = ((header.header_size + header.page_size - 1) / header.page_size
+ (header.vendor_ramdisk_size + header.page_size - 1) / header.page_size
+ (header.dtb_size + header.page_size - 1) / header.page_size
+ (header.vendor_ramdisk_table_size + header.page_size - 1) / header.page_size) * header.page_size;
}
base = header.kernel_addr - 0x00008000;
printf(" magic : VNDRBOOT\n");
printf(" header_version : %-10d (%08x)\n", header.header_version, header.header_version);
printf(" page_size : %-10d (%08x)\n\n", header.page_size, header.page_size);
printf(" kernel_addr : 0x%08x\n", header.kernel_addr);
printf(" ramdisk_addr : 0x%08x\n", header.ramdisk_addr);
printf(" vendor_ramdisk_size : %-10d (%08x)\n", header.vendor_ramdisk_size, header.vendor_ramdisk_size);
printf(" cmdline : %.*s\n", VENDOR_BOOT_ARGS_SIZE, header.cmdline);
printf(" tags_addr : 0x%08x\n\n", header.tags_addr);
printf(" name : %s\n\n", header.name);
printf(" header_size : %-10d (%08x)\n", header.header_size, header.header_size);
printf(" dtb_size : %-10d (%08x)\n", header.dtb_size, header.dtb_size);
printf(" dtb_addr : 0x%08"PRIx64" (%016"PRIx64")\n\n", header.dtb_addr, header.dtb_addr);
if (header.header_version > 3) {
printf(" vendor_ramdisk_table_size : %-10d (%08x)\n", header.vendor_ramdisk_table_size, header.vendor_ramdisk_table_size);
printf(" vendor_ramdisk_table_entry_num : %-10d (%08x)\n", header.vendor_ramdisk_table_entry_num, header.vendor_ramdisk_table_entry_num);
printf(" vendor_ramdisk_table_entry_size : %-10d (%08x)\n", header.vendor_ramdisk_table_entry_size, header.vendor_ramdisk_table_entry_size);
printf(" bootconfig_size : %-10d (%08x)\n\n", header.bootconfig_size, header.bootconfig_size);
fseek(f, rdt_offset, SEEK_SET);
int rdt_entry_cur;
for (rdt_entry_cur = 1; rdt_entry_cur <= header.vendor_ramdisk_table_entry_num; rdt_entry_cur++) {
if(fread(&rdt_entry, header.vendor_ramdisk_table_entry_size, 1, f)){};
char *rdt_type_name;
switch (rdt_entry.ramdisk_type) {
case 0:
rdt_type_name = "NONE";
break;
case 1:
rdt_type_name = "PLATFORM";
break;
case 2:
rdt_type_name = "RECOVERY";
break;
case 3:
rdt_type_name = "DLKM";
break;
}
printf(" vendor_ramdisk_table_entry: %d\n", rdt_entry_cur);
printf(" ramdisk_size : %-10d (%08x)\n", rdt_entry.ramdisk_size, rdt_entry.ramdisk_size);
printf(" ramdisk_offset : %-10d (%08x)\n", rdt_entry.ramdisk_offset, rdt_entry.ramdisk_offset);
printf(" ramdisk_type : %-10d (%08x): %s\n", rdt_entry.ramdisk_type, rdt_entry.ramdisk_type, rdt_type_name);
printf(" ramdisk_name : %s\n\n", rdt_entry.ramdisk_name);
printf(" board_id : %ls\n\n", rdt_entry.board_id);
}
fseek(f, bc_offset, SEEK_SET);
char bootconfig[header.bootconfig_size];
if(fread(bootconfig, header.bootconfig_size, 1, f)){};
printf(" bootconfig: %.*s\n", header.bootconfig_size, bootconfig);
}
printf(" Other:\n");
printf(" magic offset : %-10d (%08x)\n\n", i, i);
printf(" base address : 0x%08x\n\n", base);
printf(" kernel offset : 0x%08x\n", header.kernel_addr - base);
printf(" ramdisk offset : 0x%08x\n", header.ramdisk_addr - base);
printf(" tags offset : 0x%08x\n", header.tags_addr - base);
printf(" dtb offset : 0x%08"PRIx64"\n", header.dtb_addr - base);
if (header.header_version > 3) {
printf("\n");
printf(" vendor ramdisk table offset : %-10d (%08x)\n", rdt_offset, rdt_offset);
printf(" bootconfig offset : %-10d (%08x)\n", bc_offset, bc_offset);
}
}
printf("\n");
fclose(f);
return 0;
}