On Tue, 3 Dec 2019 09:10:42 -0500, Peter Relson wrote: >I suggest that you look up what the value in reg 15 >means for this case (it should be documented somewhere), and for the other >system-assisted linkage cases.
It is documented. For example: https://www.ibm.com/support/knowledgecenter/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieaa600/iea3a6_Using_the_LINK_or_LINKX_macro.htm https://www.ibm.com/support/knowledgecenter/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieaa600/iea3a6_Using_the_XCTL_or_XCTLX_macro.htm https://www.ibm.com/support/knowledgecenter/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieaa800/iea3a8_Synchronous_exits__SYNCH_or_SYNCHX_macro_.htm https://www.ibm.com/support/knowledgecenter/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieaa700/iea3a7_Description1.htm -- Tom Marchant
