Adaptable patching mechanism for mixed memory systems

A system, comprising:

• an immutable memory operatively connected to a processor and comprising a first separately compiled portion of an operating system, the first separately compiled portion comprising:
• a first operating system section comprising a patch hook comprising a patch lookup table address and associated with a first index value;
• and
• a second operating system section comprising the patch hook and associated with a second index value;
• a mutable memory operatively connected to the processor and comprising a second separately compiled portion of the operating system, the second separately compiled portion comprising:
• a patch lookup table at the patch lookup table address, the patch lookup table comprising a first patch address at an index location corresponding to the first index value;
• and
• a first patch at the first patch address,
• wherein the first separately compiled portion and the second separately compiled portion are linked to form the operating system;
• and
• the processor, configured to:
• execute, before executing the first operating system section, the patch hook associated with the first index value to determine that the first patch is at the first patch address;
• and
• execute the first patch instead of the first operating system section.

A non-transitory computer readable medium comprising instructions that, when executed by a processor, perform a method comprising:

• storing, on immutable memory, a first separately compiled portion of an operating system, the first separately compiled portion comprising:
• a first operating system section comprising a patch hook comprising a patch lookup table address and associated with a first index value;
• and
• a second operating system section comprising the patch hook associated with a second index value;
• storing, on mutable memory, a second separately compiled portion of the operating system, the second separately compiled portion comprising a patch lookup table at the patch lookup table address, wherein the first separately compiled portion and the second separately compiled portion are linked to form the operating system;
• making a determination that a change is required in the first operating system section of the first separately compiled portion;
• updating, based on the determination, the second separately compiled portion to include a first patch for the first operating system section at a first patch address;
• updating the patch lookup table to include the first patch address at an index location corresponding to the first index value;
• executing, before executing the first operating system section, the patch hook associated with the first index to determine that the first patch is at the first patch address;
• and
• executing the first patch instead of the first operating system section.