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From: tron@uni-paderborn.de (Matthias Scheler)
Newsgroups: comp.sys.amiga.programmer
Subject: New Exec-Function wanted in OS 2.0 !
Keywords: OS2.0 Exec
Message-ID: <1991Jun25.141603.3630@uni-paderborn.de>
Date: 25 Jun 91 14:16:03 GMT
Organization: Uni-GH Paderborn
Lines: 75

ATTENTION!ATTENTION!ATTENTION!ATTENTION!ATTENTION!ATTENTION!ATTENTION!

Commodore changes the Task-Switch Stackframe format for 6888x since
KickV37.175(I think so).
So,for all guys writing a Debugger,like me,it's not practible to add
a new version check every KICKV2.x release.


SO I PREFER A NEW EXECFUNCTION:

   NAME
        GetStackFrameOffset -Get Registeroffset for Stackframe

   SYNOPSIS
        RegOffset=GetStackFrameOffset(RegName,Task)
            D0.w                        D0.w  A1

   FUNCTION
        This Function should return the offset of the specified
        Register,so you can find the Register value independent
        from the KICK Version.

   INPUTS
        RegName   - ID-Number of the Register Offset you want
        Task
   RESULT
        RegOffset - Stackoffset of the Register you want
                    -1=False

   EXAMPLE
       
        
        move.l	4.w,a6
	jsr	Forbid
	move.l	#REG_SR,d0
        jsr	GetStackFrameOffset(a6)
	move.l	276(a6),a1
	move.l	TC_SPREG(a1),a1
	add.w	d0,a1
;a1 is a pointer on the Registervalue sr
	or.w	#$8000,(a1)
;Turn on Trace Mode
;Stop the Task next Run(You must have an Exeptionhandler for the Task).
	.
	.
	.
	jsr	Permit(a6)



   INCLUDES

        ENUM
        EITEM REG_D0
        EITEM REG_A0
        EITEM REG_FP0
	EITEM REG_SR
	EITEM REG_PC
	EITEM REG_FPCR
	EITEM REG_FPUSTACKFRAME
        


I think it's important to add a new function like that!

What do you think?

--
	0OOOO OOOO   OOO  O   O
	  O   O   O O   O OO  O
	  O   OOOO  O   O O O O
	  O   O   O O   O O  OO
	  O   O   O  OOO  O   O

	(Matthias Scheler, tron@uni-paderborn.de)