Method for generating an update file and corresponding server device, updating method and corresponding client device, updating method and corresponding system

A method, comprising:

• updating a binary file of a first version of software to a binary file of a second version of the software based on an update file, the updating including:
• identifying, based on the update file, one or more sections of a plurality of sections of the binary file of the first version of the software;
• logically combining, bit-by-bit, bits of the identified sections of the binary file of the first version of the software with bits of the update file corresponding to the identified sections, the logically combining including:
• applying an exclusive or operation;
• or
• applying an exclusive nor operation;
• and
• replacing bits of the identified sections of the binary file of the first version of the software with results of the logical combining, wherein the updating the binary file of the first version of software to the binary file of the second version of the software further includes:
• inserting, at a first memory location mapped to a first section of the binary file the second version of the software, which is larger than the corresponding section of the binary file of the first version of the software, a jump or call instruction identifying a second memory location, and inserting the section of the binary file of the second version of the software at the second memory location;
• or
• responding to an indication in the update file that a second section of the binary file of the second version of the software is smaller than the corresponding section of the binary file of the first version of the software by leaving empty a portion of a memory location to which the second section of the binary file of the second version of the software is mapped.

A system, comprising:

• an interface;
• and
• processing circuitry coupled to the interface, wherein the processing circuitry, in operation, builds an update file associated with a binary file of a first version of software, the building the update file including:
• compiling source code associated with a second version of the software, the compiling generating a binary file of the second version of the software;
• mapping memory locations to sections of the binary file of the second version of the software based on mappings of sections of the binary file of the first version of the software to memory locations, wherein a section of the binary file of the second version of the software having a corresponding section in the binary file of the first version of the software is mapped to a same memory location as the corresponding section of the binary file of the first version of the software;
• for one or more sections of a plurality of sections of the binary file of the first version of the software, logically combining, bit-by-bit, bits of the binary file of the first version of the software with bits of the corresponding section of the binary file of the second version of the software, the logically combining including:
• applying an exclusive or operation;
• or
• applying an exclusive nor operation;
• and
• building the update file based on the mapping of the memory locations to sections of the binary file of the second version of the software and based on results of the logical combining of the one or more sections of the plurality of sections of the binary file of the first version of the software with the corresponding sections of the binary file of the second version of the software, wherein the building the update file further includes:
• determining whether a section of the binary file of the second version of the software mapped to a first memory location is smaller or larger than the corresponding section of the binary file of the first version of the software;
• and
• in response to determining the section of the binary file of second version of the software mapped to the first memory location is larger than the corresponding section of the binary file of the first version of the software:
• mapping a second memory location to the section of the binary file of the second version of the software;
• and
• including in the update file an indication to insert at the first memory location a jump or call instruction invoking the second memory location;
• or
• in response to determining the section of the binary file of the second version of the software mapped to the first memory location is smaller than the corresponding section of the binary file of the first version of the software, including in the update file an indication to leave a portion of the first memory location empty.

A device, comprising:

• a memory;
• and
• processing circuitry coupled to the memory, wherein the processing circuitry, in operation, updates a binary file of a first version of software to a binary file of a second version of the software based on an update file, the updating including:
• identifying, based on the update file, one or more sections of a plurality of sections of the binary file of the first version of the software;
• logically combining, bit-by-bit, bits of the identified sections of the binary file of the first version of the software with bits of the update file corresponding to the identified sections, the logically combining including:
• applying an exclusive or operation;
• or
• applying an exclusive nor operation;
• and
• replacing bits of the identified sections of the binary file of the first version of the software with results of the logical combining, wherein the updating the binary file of the first version of software to the binary file of the second version of the software further includes:
• inserting, at a first memory location mapped to a first section of the binary file of the second version of the software, which is larger than the corresponding section of the binary file of the first version of the software, a jump or call instruction identifying a second memory location, and inserting the section of the binary file of the second version of the software at the second memory location;
• or
• responding to an indication in the update file that a second section of the binary file of the second version of the software is smaller than the corresponding section of the binary file of the first version of the software by leaving empty a portion of memory location to which the second section of the binary file of the second version of the software is mapped.

A non-transitory computer-readable medium having contents which cause a server to build an update file associated with a first version of software, the building the update file including:

• compiling source code associated with a second version of the software, the compiling generating a binary file of the second version of the software;
• mapping memory locations to sections of the binary file of the second version of the software based on mappings of sections of a binary file of the first version of the software to memory locations, wherein a section of the binary file of the second version of the software having a corresponding section in the binary file of the first version of the software is mapped to a same memory location as the corresponding section of the binary file of the first version of the software;
• for one or more sections of a plurality of sections of the binary file of the first version of the software, logically combining, bit-by-bit, bits of the binary file of the first version of the software with bits of the corresponding section of the binary file of the second version of the software, the logically combining including:
• applying an exclusive or operation;
• or
• applying an exclusive nor operation;
• and
• building the update file based on the mapping of the memory locations to sections of the binary file of the second version of the software and on results of the logical combining of the one or more sections of the plurality of sections of the binary file of the first version of the software with the corresponding sections of the binary file of the second version of the software, wherein the building the update file further includes:
• determining whether a section of the binary file of the second version of the software mapped to a first memory location is smaller or larger corresponding section of the binary file of the first version of the software;
• and
• in response to determining section of the binary file of second version of the software mapped to the first memory location is larger than the corresponding section of the binary file of the first version of the software:
• mapping a second memory location to the section of the binary file of the second version of the software;
• and
• including in the update file an indication to insert at the first memory location a jump or call instruction invoking the second memory location;
• or
• in response to determining the section of the binary file of the second version of the software mapped to the first memory location is smaller than the corresponding section of the binary file of the first version of the software, including in the update file an indication to leave a portion of the first memory location empty.

A non-transitory computer-readable medium having contents which cause a device to update a binary file of a first version of software to a binary file of a second version of the software, the updating including:

• identifying one or more sections of a plurality of sections of the binary file of the first version of the software;
• logically combining, bit-by-bit, bits of the identified sections of the binary file of the first version of the software with bits corresponding to the identified sections, the logically combining including:
• applying an exclusive or operation;
• or
• applying an exclusive nor operation;
• and
• replacing bits of the identified sections of the binary file of the first version of the software with results of the logical combining, wherein the updating the binary file of the first version of software to the binary file of the second version of the software further includes:
• inserting, at a first memory location mapped to a first section of the binary file of the second version of the software, which is larger than the corresponding section of the binary file of the first version of the software, a jump or call instruction identifying a second memory location, and inserting the section of the binary file of the second version of the software at the second memory location;
• or
• responding to an indication that a second section of the binary file of the second version of the software is smaller than the corresponding section of the binary file of the first version of the software by leaving empty a portion of a memory location to which the second section of the binary file of the second version of the software is mapped.