Help with stack layout of SPARC

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Article #42316

#42316

From: Varadarajan
Date: Mon, 11 Dec 1995 00:00

23 lines
1473 bytes

Hi all,

This is an extract from sparc.h file from gcc...
/* Actual top-of-stack address is 92/136 greater than the contents of the
   stack pointer register for !v9/v9.  That is:
   - !v9: 64 bytes for the in and local registers, 4 bytes for structure return
     address, and 24 bytes for the 6 register parameters.
   - v9: 128 bytes for the in and local registers + 8 bytes reserved.  */

But when I see the output of assembly programs that are generated by
gcc, I happen to get 
save %sp, -112, %sp...

Now what is this extra 20 bytes used for?? Am I missing something very
silly and stupid.
Thanks for the help,
Best Regards,
-- 
------------------------------------------------------------------------
| Varadarajan.T.S.            |  It's not an optical illusion, it just |
| M.S. Comp Science           |              looks like one.           |
| tsv@cs.umanitoba.ca         |         #include "std_disclaimer.h"    |
------------------------------------------------------------------------

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From: tsv@cs.umanitoba.CA (Varadarajan)
Subject: Help with stack layout of SPARC
Date: 1995/12/11
Message-ID: <9512120222.AA09124@nickel.cs.umanitoba.ca>
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