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import common
import struct
def FindRadio(zipfile):
try:
return zipfile.read("RADIO/radio.img")
except KeyError:
return None
def FullOTA_InstallEnd(info):
try:
bootloader_img = info.input_zip.read("RADIO/bootloader.img")
except KeyError:
print "no bootloader.img in target_files; skipping install"
else:
WriteBootloader(info, bootloader_img)
radio_img = FindRadio(info.input_zip)
if radio_img:
WriteRadio(info, radio_img)
else:
print "no radio.img in target_files; skipping install"
def IncrementalOTA_VerifyEnd(info):
target_radio_img = FindRadio(info.target_zip)
source_radio_img = FindRadio(info.source_zip)
if not target_radio_img or not source_radio_img: return
if source_radio_img != target_radio_img:
info.script.CacheFreeSpaceCheck(len(source_radio_img))
radio_type, radio_device = common.GetTypeAndDevice("/radio", info.info_dict)
info.script.PatchCheck("%s:%s:%d:%s:%d:%s" % (
radio_type, radio_device,
len(source_radio_img), common.sha1(source_radio_img).hexdigest(),
len(target_radio_img), common.sha1(target_radio_img).hexdigest()))
def IncrementalOTA_InstallBegin(info):
# Reduce the space taken by the journal.
info.script.Unmount("/system")
info.script.TunePartition("/system", "-O", "^has_journal")
info.script.Mount("/system")
def IncrementalOTA_InstallEnd(info):
try:
target_bootloader_img = info.target_zip.read("RADIO/bootloader.img")
try:
source_bootloader_img = info.source_zip.read("RADIO/bootloader.img")
except KeyError:
source_bootloader_img = None
if source_bootloader_img == target_bootloader_img:
print "bootloader unchanged; skipping"
else:
WriteBootloader(info, target_bootloader_img)
except KeyError:
print "no bootloader.img in target target_files; skipping install"
tf = FindRadio(info.target_zip)
if not tf:
# failed to read TARGET radio image: don't include any radio in update.
print "no radio.img in target target_files; skipping install"
else:
tf = common.File("radio.img", tf)
sf = FindRadio(info.source_zip)
if not sf:
# failed to read SOURCE radio image: include the whole target
# radio image.
WriteRadio(info, tf.data)
else:
sf = common.File("radio.img", sf)
if tf.sha1 == sf.sha1:
print "radio image unchanged; skipping"
else:
diff = common.Difference(tf, sf, diff_program="bsdiff")
common.ComputeDifferences([diff])
_, _, d = diff.GetPatch()
if d is None or len(d) > tf.size * common.OPTIONS.patch_threshold:
# computing difference failed, or difference is nearly as
# big as the target: simply send the target.
WriteRadio(info, tf.data)
else:
common.ZipWriteStr(info.output_zip, "radio.img.p", d)
info.script.Print("Patching radio...")
radio_type, radio_device = common.GetTypeAndDevice(
"/radio", info.info_dict)
info.script.ApplyPatch(
"%s:%s:%d:%s:%d:%s" % (radio_type, radio_device,
sf.size, sf.sha1, tf.size, tf.sha1),
"-", tf.size, tf.sha1, sf.sha1, "radio.img.p")
def WriteRadio(info, radio_img):
info.script.Print("Writing radio...")
common.ZipWriteStr(info.output_zip, "radio.img", radio_img)
_, device = common.GetTypeAndDevice("/radio", info.info_dict)
info.script.AppendExtra(
'package_extract_file("radio.img", "%s");' % (device,))
# /* msm8960 bootloader.img format */
#
# #define BOOTLDR_MAGIC "BOOTLDR!"
# #define BOOTLDR_MAGIC_SIZE 8
#
# struct bootloader_images_header {
# char magic[BOOTLDR_MAGIC_SIZE];
# unsigned int num_images;
# unsigned int start_offset;
# unsigned int bootldr_size;
# struct {
# char name[64];
# unsigned int size;
# } img_info[];
# };
def WriteBootloader(info, bootloader):
info.script.Print("Writing bootloader...")
# bootloader.img contains 6 separate images. Each goes to its own
# partition; we write all 6 for development devices but skip one for
# release devices.. There are backup partitions of all but the
# special one that we also write. The special one is "sbl1", which
# does not have a backup, so we don't update it on release devices..
header_fmt = "<8sIII"
header_size = struct.calcsize(header_fmt)
magic, num_images, start_offset, bootloader_size = struct.unpack(
header_fmt, bootloader[:header_size])
assert magic == "BOOTLDR!", "bootloader.img bad magic value"
img_info_fmt = "<64sI"
img_info_size = struct.calcsize(img_info_fmt)
imgs = [struct.unpack(img_info_fmt,
bootloader[header_size+i*img_info_size:
header_size+(i+1)*img_info_size])
for i in range(num_images)]
total = 0
p = start_offset
img_dict = {}
for name, size in imgs:
img_dict[trunc_to_null(name)] = p, size
p += size
assert p - start_offset == bootloader_size, "bootloader.img corrupted"
imgs = img_dict
common.ZipWriteStr(info.output_zip, "bootloader-flag.txt",
"updating-bootloader" + "\0" * 13)
common.ZipWriteStr(info.output_zip, "bootloader-flag-clear.txt", "\0" * 32)
_, misc_device = common.GetTypeAndDevice("/misc", info.info_dict)
info.script.AppendExtra(
'package_extract_file("bootloader-flag.txt", "%s");' %
(misc_device,))
# flashing sbl1 is somewhat dangerous because if we die while doing
# it the device can't boot. Do it for development devices but not
# release devices.
fp = info.info_dict["build.prop"]["ro.build.fingerprint"]
if "release-keys" in fp:
to_flash = "sbl2 sbl3 tz rpm aboot".split()
else:
to_flash = "sbl1 sbl2 sbl3 tz rpm aboot".split()
# Write the images to separate files in the OTA package
for i in to_flash:
try:
_, device = common.GetTypeAndDevice("/"+i, info.info_dict)
except KeyError:
print "skipping flash of %s; not in recovery.fstab" % (i,)
continue
common.ZipWriteStr(info.output_zip, "bootloader.%s.img" % (i,),
bootloader[imgs[i][0]:imgs[i][0]+imgs[i][1]])
info.script.AppendExtra('package_extract_file("bootloader.%s.img", "%s");' %
(i, device))
info.script.AppendExtra(
'package_extract_file("bootloader-flag-clear.txt", "%s");' %
(misc_device,))
try:
# there is no "sbl1b" partition
for i in "sbl2 sbl3 tz rpm aboot".split():
_, device = common.GetTypeAndDevice("/"+i+"b", info.info_dict)
info.script.AppendExtra(
'package_extract_file("bootloader.%s.img", "%s");' % (i, device))
except KeyError:
pass
def trunc_to_null(s):
if '\0' in s:
return s[:s.index('\0')]
else:
return s
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