Firmware publication of multiple binary images
Multiple binary images stored in the firmware of an electronic device are written to the device's configuration tables during booting of the device, where one of the binary images is a manager binary. During booting, the manager binary is saved to the file system of the operating system such that it automatically executes upon completion of booting. The manager binary then saves the other binary images to the OS file system, such that they also execute automatically.
1. A method for publishing multiple binary images from firmware in an electronic device to an operating system in the electronic device, the method comprising:
during booting of the electronic device, the steps of:
installing a first binary image, which is stored in the firmware, into a configuration table in the electronic device;
installing a second binary image, which is stored in the firmware, into the configuration table; and
saving a copy of the first binary image in a file system of the operating system; and
after the operating system has started loading, the step of executing the copy of the first binary image to:
save a copy of the second binary image in the file system; and
copy a third binary image from the configuration table to the file system.
2. The method of claim 1 , comprising installing the third binary image, which is stored in the firmware, into the configuration table.
3. The method of claim 1 , wherein the copy of the first binary image, when executed, performs the steps of:
searching through the configuration table to find the second and third binary images; and
checking integrity of the second and third binary images;
before the steps of saving the copy of the second binary image in the file system and copying the third binary image from the configuration table to the file system.
4. The method of claim 1 comprising:
calculating a hash of the second and third binary images in the configuration table;
storing the hash in a read-only UEFI (Unified Extensible Firmware Interface) variable; and
checking, by the copy of the first binary image, the second and third binary images for integrity by accessing the hash.
5. The method of claim 1 , wherein:
the second and third binary images are provided by different entities; and
the configuration table is an Advanced Configuration and Power Interface table.
6. The method of claim 1 , wherein:
the first binary image is installed into a specific operating system platform binary table within the configuration table; and
the second and third binary images are both installed as nodes in a common platform binary table within the configuration table.
7. The method of claim 1 , wherein the copy of the first binary image, when executed, performs the step of:
changing a registry in the operating system so that the second and third binary images are automatically executed after the operating system has loaded.
8. An electronic device that publishes multiple binary images, the electronic device comprising:
a processor;
an operating system; and
firmware storing computer readable instructions, which, when executed by the processor cause the electronic device, during booting of the electronic device, to:
install a first binary image, which is stored in the firmware, into a configuration table in the electronic device;
install a second binary image, which is stored in the firmware, into the configuration table;
install a third binary image, which is stored in the firmware, into the configuration table; and
save a copy of the first binary image in a file system of the operating system; and, after the operating system has started loading, cause the electronic device to execute the copy of the first binary image and thereby:
save a copy of the second binary image in the file system; and
save a copy of the third binary image in the file system.
9. The electronic device of claim 8 , wherein the configuration table is an Advanced Configuration and Power Interface table.
10. The electronic device of claim 8 , wherein:
the first binary image is installed into a specific operating system platform binary table within the configuration table;
the second and third binary images are each installed into separate individual platform binary tables within the configuration table.
11. A non-transitory computer readable media comprising computer readable instructions, which, when executed by a processor in an electronic device that has firmware, cause the electronic device, during booting of the electronic device, to:
install a first binary image, which is stored in the firmware, into a configuration table in the electronic device;
install a second binary image, which is stored in the firmware, into the configuration table;
install a third binary image, which is stored in the firmware, into the configuration table;
save a copy of the first binary image in a file system of an operating system of the electronic device; and,
cause the electronic device to execute the copy of the first binary image and thereby:
save a copy of the second binary image in the file system; and
save a copy of the third binary image in the file system.