US 11,231,918 B1Granted

Native emulation compatible application binary interface for supporting emulation of foreign code

AssigneeMicrosoft Technologly Licensing, LLC

InventorsPedro Miguel Sequeira De Justo Teixeira, Darek Josip Mihocka, Jon Robert Berry, Russell Charles Hadley, James David Cleary, Clarence Siu Yeen Dang

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Abstract

A function is compiled against a first application binary interface (ABI) and a second ABI of a native first instruction set architecture (ISA). The second ABI defines context data not exceeding a size expected by a third ABI of a foreign second ISA, and uses a subset of registers of the first ISA that are mapped to registers of the second ISA. Use of the subset of registers by the second ABI results in some functions being foldable when compiled using both the first and second ABIs. First and second compiled versions of the function are identified as foldable, or not, based on whether the compiled versions match. Both the first and second compiled versions are emitted into a binary file when they are not foldable, and only one of the first or second compiled versions is emitted into the binary file when they are foldable.

Claims20

Dependent claims

A method, implemented at a computer system that includes a processor, for compiling source code to a binary file targeting a native first instruction set architecture (ISA) while being operable with code compiled to a foreign second ISA, the method comprising:

identifying (i) a first application binary interface (ABI) corresponding to the first ISA, (ii) a second ABI corresponding to the first ISA, and (iii) a third ABI corresponding to the second ISA, wherein the second ABI,
defines a first context data format that has a first size that does not exceed second size of a second context data format used by the third ABI;
and
defines use of a subset of registers from among a plurality of registers of the first ISA and that are used by the first ABI, the subset of registers being mapped to a set of registers of the second ISA that are used by the third ABI, use of the subset of registers by the second ABI resulting in at least a portion of functions being foldable when compiled using each of the first ABI and the second ABI;
and
for a function defined in the source code, performing at least the following:
generating a first compiled version of the function that targets the first ABI, including generating a first set of instructions in the first ISA;
generating a second compiled version of the function that targets the second ABI, including generating a second set of instructions in the first ISA;
determining whether the first compiled version of the function and the second compiled version of the function are foldable within the binary file, based at least on determining whether the first set of instructions and the second set of instructions match;
and
based at least on determining whether the first compiled version of the function and the second compiled version of the function are foldable within the binary file, performing one of:
when the first compiled version of the function and the second compiled version of the function are determined to not be foldable within the binary file, emitting both the first compiled version of the function and the second compiled version of the function into the binary file;
or
when the first compiled version of the function and the second compiled version of the function are determined to be foldable within the binary file, emitting only one of the first compiled version of the function or the second compiled version of the function into the binary file.

11 more elements

A computer system for compiling source code to a binary file targeting a native first instruction set architecture (ISA) while being operable with code compiled to a foreign second ISA, comprising:

a processor;
and
a hardware storage device that stores computer-executable instructions that are executable by the processor to cause the computer system to perform at least the following:
identify (i) a first application binary interface (ABI) corresponding to the first ISA, (ii) a second ABI corresponding to the first ISA, and (iii) a third ABI corresponding to the second ISA, wherein the second ABI,
defines a first context data format that has a first size that does not exceed second size of a second context data format used by the third ABI;
and
defines use of a subset of registers from among a plurality of registers of the first ISA and that are used by the first ABI, the subset of registers being mapped to a set of registers of the second ISA that are used by the third ABI, use of the subset of registers by the second ABI resulting in at least a portion of functions being foldable when compiled using each of the first ABI and the second ABI;
and
for a function defined in the source code, perform at least the following:
generating a first compiled version of the function that targets the first ABI, including generating a first set of instructions in the first ISA;
generating a second compiled version of the function that targets the second ABI, including generating a second set of instructions in the first ISA;
determining whether the first compiled version of the function and the second compiled version of the function are foldable within the binary file, based at least on determining whether the first set of instructions and the second set of instructions match;
and
based at least on determining whether the first compiled version of the function and the second compiled version of the function are foldable within the binary file, perform one of:
when the first compiled version of the function and the second compiled version of the function are determined to not be foldable within the binary file, emitting both the first compiled version of the function and the second compiled version of the function into the binary file;
or
when the first compiled version of the function and the second compiled version of the function are determined to be foldable within the binary file, emitting only one of the first compiled version of the function or the second compiled version of the function into the binary file.

14 more elements

A computer program product for compiling source code to a binary file targeting a native first instruction set architecture (ISA) while being operable with code compiled to a foreign second ISA, the computer program product comprising a hardware storage device that stores computer-executable instructions that are executable by a processor to cause a computer system to perform at least the following:

identify (i) a first application binary interface (ABI) corresponding to the first ISA, (ii) a second ABI corresponding to the first ISA, and (iii) a third ABI corresponding to the second ISA, wherein the second ABI,
defines a first context data format that has a first size that does not exceed second size of a second context data format used by the third ABI;
and
defines use of a subset of registers from among a plurality of registers of the first ISA and that are used by the first ABI, the subset of registers being mapped to a set of registers of the second ISA that are used by the third ABI;
and
for a function defined in the source code, perform at least the following:
generating a compiled version of the function that targets the second ABI, including generating a set of instructions in the first ISA;
and
emitting the compiled version of the function into the binary file.

6 more elements

Dependencies are inferred from the claim text.