On Mon, 2 Aug 2010 13:21:08 -0600, Steve Comstock wrote: >On p. 12, point 3) says: > >"... 216-byte save area (if using F5SA) or 288-byte save area >(if using F8SA)..." > >but your layout of F5SA (p. 11) is 52 words (208 bytes) and >your layout of F8SA (p. 12) is 70 words (280 bytes)
The DSECT in IHASAVER for SAVF5SA includes 8 bytes at the end that are reserved. Perhaps the same will be true for the DSECT that is used to map a F8SA. > >On pages 21, 23, and 241 you refer to a F6SA; but you never define >that; how is it different from a F4SA? There is no such thing as a F6SA or a F1SA. Those values at offset 4 in the save area that you create for programs that you call are to document the fact that you stored your registers using the linkage stack. Perhaps the biggest clarification on this version of the book is the meaning of the word at offset 4. As documented in "Using a caller-provided save area" on page 8. <quote> In all save areas, the second word (the word at offset 4) of each save area provides an indication of how the program that created the save area saved the caller's registers. It does not describe the contents of this save area. </quote> -- Tom Marchant
