1aeef725a7
For following cases:
Case 1: A/B devices: no change
Case 2: non-A/B devices, with unsigned recovery image:
not allowed anymore by mandating BOARD_AVB_RECOVERY_KEY_PATH
Case 3: non-A/B devices, with signed recovery image:
vbmeta.img should not include ChainPartitionDescriptor of recovery.img,
otherwise device can not even boot into normal mode if recovery partition
is damaged
This CL will cause a build break if BOARD_AVB_RECOVERY_KEY_PATH
is not set for non-A/B targets with recovery.img
The following is an example to fix the build break by specifying
AVB signing configs for the recovery.img.
BOARD_AVB_RECOVERY_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
BOARD_AVB_RECOVERY_ALGORITHM := SHA256_RSA2048
BOARD_AVB_RECOVERY_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
BOARD_AVB_RECOVERY_ROLLBACK_INDEX_LOCATION := 2
Also note that libavb in bootloader needs an update to include this
commit Iaa886037edb18c2ff6c60fa2a7f883ab7303ba1a, to support verifying
recovery.img independently (not through vbmeta.img).
Bug: 130351427
Test (Case 3):
normal mode: avb_slot_verify(flags=AVB_SLOT_VERIFY_FLAGS_NONE)
recovery mode: avb_slot_verify(flags=AVB_SLOT_VERIFY_FLAGS_NO_VBMETA_PARTITION)
Test: PYTHONPATH=build/make/tools/releasetools \
python -m unittest test_validate_target_files
Test: Use a lunch'd target. `atest --host releasetools_test releasetools_py3_test`
Test: validate_target_files.py with Case-3 target files
Change-Id: I2a73252b385fa463b4abd444923a8acc473df0b4
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||
|---|---|---|
| common | ||
| core | ||
| packaging | ||
| target | ||
| tests | ||
| tools | ||
| .gitignore | ||
| Changes.md | ||
| CleanSpec.mk | ||
| Deprecation.md | ||
| OWNERS | ||
| README.md | ||
| Usage.txt | ||
| buildspec.mk.default | ||
| envsetup.sh | ||
| help.sh | ||
| navbar.md | ||
| tapasHelp.sh | ||
README.md
Android Make Build System
This is the Makefile-based portion of the Android Build System.
For documentation on how to run a build, see Usage.txt
For a list of behavioral changes useful for Android.mk writers see Changes.md
For an outdated reference on Android.mk files, see build-system.html. Our Android.mk files look similar, but are entirely different from the Android.mk files used by the NDK build system. When searching for documentation elsewhere, ensure that it is for the platform build system -- most are not.
This Makefile-based system is in the process of being replaced with Soong, a new build system written in Go. During the transition, all of these makefiles are read by Kati, and generate a ninja file instead of being executed directly. That's combined with a ninja file read by Soong so that the build graph of the two systems can be combined and run as one.