commit | 00a912efccb760429efbf905d679210d8ff4e94c | [log] [tgz] |
---|---|---|
author | Cheng-Han Yang <chenghan@google.com> | Fri Nov 09 14:49:29 2018 |
committer | chrome-bot <chrome-bot@chromium.org> | Thu Nov 15 16:11:39 2018 |
tree | 63223a52df4e7502fc1d8435d7c3f7786be58f35 | |
parent | f081fc41fdf840190914266efac221b1623d5b0d [diff] |
factory_install: Assume device in factory mode if cr50 version is 0.0.*. When the device is booted into factory shim right after manufactured, it is in factory mode but its cr50 is in a default old version and does not support '-I' option and factory mode. In this case, treat it as factory mode enabled to avoid turning on factory mode. BUG=b:119289254 TEST=Manually test on DUT. Change-Id: I2ae6d8ffa2937a29fd23d29e6fea5df84c4fc248 Reviewed-on: https://chromium-review.googlesource.com/1329381 Commit-Ready: Cheng-Han Yang <chenghan@chromium.org> Tested-by: Cheng-Han Yang <chenghan@chromium.org> Reviewed-by: Wei-Han Chen <stimim@chromium.org>
This folder contains the major scripts for the “Chrome OS factory shim”. The shim is used for installing a Chrome OS image (kernel, rootfs and firmware) to a device. It's also known as “(factory) install shim”, “RMA shim”, or “Reset shim”.
The factory shim is designed to allow operators removing USB stick once it's booted, so the boot process is slightly different. The shim relies on initramfs
technology to bootstrap and load all contents into memory, then start an upstart service to display the menu.
Inside chroot, do:
build_packages --board $BOARD build_image --board $BOARD factory_install
The output disk image is in ~/trunk/src/build/images/$BOARD/latest/factory_install_shim.bin
.
If you have local changes in src/platform/factory_installer
, please remember to do
cros_workon --board $BOARD start factory_installer emerge-$BOARD factory_installer
If you have local changes in src/platform/initramfs
, please remember to do
cros_workon --board $BOARD start chromeos-initramfs
There‘s no need to emerge chromeos-initramfs
because it’s always re-built in build_image
stage.
The factory shims were signed in a special way for security reasons. It needs to boot with “developer switch turned on” and “boot in recovery mode”.
If you have a signed factory shim, follow the steps to boot:
Esc-F3-Power
)Ctrl-D
to request turn on developer switch, and ENTER
to confirm.If you boot factory shim in developer mode (Ctrl-U
), few functions won't work, for example recovering TPM.
Factory shims do not provide shells by default for security reason. If you can still see virtual terminal consoles, try VT0, VT1, VT2, VT3 - there are lots of debug messages there.
If you do need a shell to debug, add cros_debug
to kernel command line. You can do this in build_image
:
build_image --board $BOARD --boot_args cros_debug factory_install
For an existing image, you can use make_dev_ssd.sh
to change kernel command line easily:
# inside chroot cd ~/trunk/src/platform/vboot_reference/scripts/image_signing ./make_dev_ssd.sh -i $PATH_TO_IMAGE_OR_USB_DEVICE \ --partitions 2 --recovery --edit_config
This will bring an editor to allow editing command line.
Note make_dev_ssd.sh
is also available on all Chrome OS image (even factory shim) - try /usr/share/vboot/bin/make_dev_ssd.sh
.
If you boot a factory shim with cros_debug
, then you should have one shell in VT2 or VT3. Moreover, if you can enter the menu, ‘S’ will give you the full shell.
The frecon
(or frecon-lite
) provides text-based console. If you can't see anything on screen, redirect the console to another device, for example Servo consoles so you can check why frecon
failed. To do this, add console=ttyS0,115200n8
to kernel command line (use the make_dev_ssd.sh
or add --boot_args
as explained in previous section). Some devices may need different TTY name for example ttyS1
. Please check the care-and-feed doc of your device.
If the menu or frecon will die and adding cros_debug
does not help, you probably want to attach serial console (for example SuzyQ) and get everything except factory shim UI (menu) there. To do that:
Open the /usr/sbin/factory_tty.sh
and find the TTY_CONSOLE=
line. If it already has valid serial console (for example ttyS0
), move to step 3.
TTY_CONSOLE
and build image.Edit the make.conf
in board overlay, to find or add one setting (assume serial console is ttyS0
):
TTY_CONSOLE="ttyS0"
Then,then re-build the factory_installer
package and factory shim:
emerge-$BOARD factory_installer build_image --board $BOARD factory_install
Mount the rootfs and rename /etc/init/console-ttyS0.conf
to something that does not start as console
:
# First enable RW for rootfs. Assume the USB is in /dev/sdX. cd ~/trunk/src/platform/vboot_reference/scripts/image_signing sudo ./make_dev_ssd.sh -i /dev/sdX --recovery \ --remove_rootfs_verification --partitions 2 # Mount (assume your shim is in /dev/sdX) sudo mount /dev/sdX /media cd /media/etc/init sudo mv console-ttyS0.confg debug-ttyS0.conf cd - # To leave /media folder so we can unmount. sudo umount /media