Linkage conventions

转自:http://publib.boulder.ibm.com/infocenter/zos/v1r12/index.jsp?topic=%2Fcom.ibm.zos.r12.ieaa600%2Fchap2.htm

Linkage conventions are the register and save area conventions a program must follow when it receives control from another program or when it calls another program. It is important that all programs follow the linkage conventions described here to ensure that the programs can successfully pass control from one to the other while preserving register contents and parameter data that they need to run successfully.

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