On Thu, 27 Jan 2022 18:02:07 +0000, Seymour J Metz <sme...@gmu.edu> wrote:
>> What I did say is "A program that saves its caller's registers in >> standard 72-byte format is expected to set offset 4 of the save >> area that it obtains to the address of the previous save area, >> regardless of the size of save area that it provides." > >Exactly, and that is incorrect because some programs that save >the callers registers in standard 72-byte format are expected to >set offset 4 of the saves that thet obtain tp F5SA or F8SA, not to >the address of the previous save area. That is not using standard 72-byte format, but using F5SA or F8SA format. In these formats, the contents of the registers are split between two save areas, one of which looks identical to a standard save area. >* The target alters a nonvolatile AR - F8SA No. That is not what F8SA was designed for. From the Assembler Services Guide: <quote> Note: The F8SA area is exactly like the F5SA area except for the identification string saved into the second word and the fact that the F8SA area provides space into which a program called by the creator of the save area can save both ARs and 64-bit GPRs whereas the F5SA area provides space only for the 64-bit GPRs. </quote> -- Tom Marchant
