Apple Inc.

Ezekiel T Runyon

Joshua P De Cesare

Timothy R Paaske

Eric Brandon Tamura

Damien Pascal Sorresso

Jeffrey R Wilcox

Hardik K Doshi

Xeno S Kovah

Corey T Kallenberg

Nikolaj Schlej

Kevin H Alderfer

Aspects and features include maintaining at least one auxiliary disk image on a computing device. Certain code that is aligned with the base operating system of the computing device resides in and is executed from the auxiliary disk image. In one example, a computing device receives an update asset and uses it to patch the auxiliary disk image. The computing device executes the updated code from the patched disk image without rebooting or otherwise restarting the base operating system. The existing auxiliary disk image may be replaced with the patched disk image in response to a reboot or some other event, or while executing the code in the patched disk image from memory.

Patching code aligned with an executing base operating system

A method and apparatus for performing a secure boot of a computer system is disclosed. A computer system according to the disclosure includes an auxiliary processor and a main processor. The boot process includes initially booting the auxiliary processor. The auxiliary processor includes a non-volatile memory storing boot code for the main processor. The auxiliary processor may perform a verification of the boot code. Subsequent to verifying the boot code, the main processor may be released from a reset state. Once the main processor is no longer in the reset state, the boot code may be provided thereto. Thereafter, the boot procedure may continue with the main processor executing the boot code.

Method and apparatus for secure system boot

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San Francisco, CA, United States of America

Ezekiel T Runyon