I don't have direct experience, but I believe that system/360 programs have historically not had stacks, opting instead for a statically allocated 'program sav

I don't have direct experience, but I believe that system/360 programs have historically not had stacks, opting instead for a statically allocated 'program save area'. https://people.cs.clemson.edu/~mark/subroutines/s360.html https://people.cs.clemson.edu/~mark/subroutines/s360.html XPLINK, a different linkage convention, also for MVS, does have use a stack-based convention: https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.2.0/com.ibm.zos.v2r2.ceea200/xplchap.htm https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.2.0/...