mkbootimg: add version and patch level
Adds operating system version and security patch level to the boot
image header. This change takes over two existing unused fields to
preserve compatibility with existing devices.
Bug: 27498078
Bug: 22914603
Change-Id: I57682611e0c27fec5ed284da7d9a788383ff98b1
diff --git a/mkbootimg/bootimg.h b/mkbootimg/bootimg.h
index 5ab6195..2bd8230 100644
--- a/mkbootimg/bootimg.h
+++ b/mkbootimg/bootimg.h
@@ -43,7 +43,11 @@
uint32_t tags_addr; /* physical addr for kernel tags */
uint32_t page_size; /* flash page size we assume */
- uint32_t unused[2]; /* future expansion: should be 0 */
+
+ /* operating system version; "1.2.34" -> 010234 */
+ uint32_t os_version;
+ /* operating system patch level; "2016-01-01" -> 20160101 */
+ uint32_t os_patch_level;
uint8_t name[BOOT_NAME_SIZE]; /* asciiz product name */
diff --git a/mkbootimg/mkbootimg b/mkbootimg/mkbootimg
index f95d703..be342c9 100755
--- a/mkbootimg/mkbootimg
+++ b/mkbootimg/mkbootimg
@@ -20,6 +20,7 @@
from struct import pack
from hashlib import sha1
import sys
+import re
def filesize(f):
if f is None:
@@ -47,7 +48,7 @@
def write_header(args):
BOOT_MAGIC = 'ANDROID!'.encode()
args.output.write(pack('8s', BOOT_MAGIC))
- args.output.write(pack('8I',
+ args.output.write(pack('10I',
filesize(args.kernel), # size in bytes
args.base + args.kernel_offset, # physical load addr
filesize(args.ramdisk), # size in bytes
@@ -55,8 +56,9 @@
filesize(args.second), # size in bytes
args.base + args.second_offset, # physical load addr
args.base + args.tags_offset, # physical addr for kernel tags
- args.pagesize)) # flash page size we assume
- args.output.write(pack('8x')) # future expansion: should be 0
+ args.pagesize, # flash page size we assume
+ args.os_version, # operating system version
+ args.os_patch_level)) # security patch level
args.output.write(pack('16s', args.board.encode())) # asciiz product name
args.output.write(pack('512s', args.cmdline[:512].encode()))
@@ -97,6 +99,18 @@
def parse_int(x):
return int(x, 0)
+def match_to_int(x):
+ if (x and x.lastindex == 3):
+ return (parse_int(x.group(3)) +
+ parse_int(x.group(2)) * 100 +
+ parse_int(x.group(1)) * 10000)
+ return 0
+
+def parse_os_version(x):
+ return match_to_int(re.search(r'^(\d+)\.(\d{1,2})\.(\d{1,2})', x))
+
+def parse_os_patch_level(x):
+ return match_to_int(re.search(r'^(\d{4,})-(\d{2})-(\d{2})', x))
def parse_cmdline():
parser = ArgumentParser()
@@ -111,6 +125,10 @@
parser.add_argument('--ramdisk_offset', help='ramdisk offset', type=parse_int, default=0x01000000)
parser.add_argument('--second_offset', help='2nd bootloader offset', type=parse_int,
default=0x00f00000)
+ parser.add_argument('--os_version', help='operating system version', type=parse_os_version,
+ default=0)
+ parser.add_argument('--os_patch_level', help='operating system patch level',
+ type=parse_os_patch_level, default=0)
parser.add_argument('--tags_offset', help='tags offset', type=parse_int, default=0x00000100)
parser.add_argument('--board', help='board name', default='', action=ValidateStrLenAction,
maxlen=16)