Function name resolution in library transformation on same architecture

A computer system comprising:

• a processor set;
• one or more computer-readable storage media;
• and
• program instructions stored on the one or more computer-readable storage media to cause the processor set to perform operations comprising:
• transforming a library from a source operating system to a target operating system, wherein:
• the source operating system comprises a source application binary interface;
• the target operating system comprises a target application binary interface;
• the target application binary interface is different than the source application binary interface;
• the target operating system is only enabled to handle fixed length function names;
• the library is implemented by a source object file, the source object file (i) being compliant with the source application binary interface and (ii) comprising at least a source memory image, source symbol information, and source relocation information;
• and
• transforming the library from the source operating system to the target operating system comprises:
• creating a target memory image, wherein:
• the target memory image is compliant with the target application binary interface;
• and
• the target memory image is derived from the source memory image;
• enriching the target memory image with address information pointing to a variable length information derived from a source symbol name for every external source symbol, wherein:
• the enriching is performed by placing a pointer into a target memory image location at a fixed offset from a target symbol address;
• and
• the pointer points to a start address of a table storing full original function names from source code;
• and
• writing the target memory image to a target object file to implement a transformed shared library by the target object file.

A computer program product comprising:

• one or more computer-readable storage media;
• and
• program instructions stored on the one or more computer-readable storage media to perform operations comprising:
• transforming a library from a source operating system to a target operating system, wherein:
• the source operating system comprises a source application binary interface;
• the target operating system comprises a target application binary interface;
• the target application binary interface is different than the source application binary interface;
• the target operating system is only enabled to handle fixed length function names;
• the library is implemented by a source object file, the source object file (i) being compliant with the source application binary interface and (ii) comprising at least a source memory image, source symbol information, and source relocation information;
• and
• transforming the library from the source operating system to the target operating system comprises:
• creating a target memory image, wherein:
• the target memory image is compliant with the target application binary interface;
• and
• the target memory image is derived from the source memory image;
• enriching the target memory image with address information pointing to a variable length information derived from a source symbol name for every external source symbol, wherein:
• the enriching is performed by placing a pointer into a target memory image location at a fixed offset from a target symbol address;
• and
• the pointer points to a start address of a table storing full original function names from source code;
• and
• writing the target memory image to a target object file to implement a transformed shared library by the target object file.