Path: utzoo!mnetor!uunet!husc6!hao!ames!ucbcad!pasteur!ucbvax!hoser.berkeley.edu!bryce
From: bryce@hoser.berkeley.edu (Bryce Nesbitt)
Newsgroups: comp.sys.amiga
Subject: ]}{wpoerioiew23 dsflwe
Message-ID: <22682@ucbvax.BERKELEY.EDU>
Date: 20 Jan 88 20:53:01 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: bryce@hoser.berkeley.edu (Bryce Nesbitt)
Organization: The Logic Foundation
Lines: 49

;NAME
;    SetStack -- use a different process stack
;    V1.0 Tuesday 19-Jan-88 04:14:15 By Bryce Nesbitt
;
;SYNOPSIS
;    SetStack(newstack,size)
;	      a1       d0
;
;    char *newstack;
;    long size;
;
;FUNCTION
;    This function points the current process' stack to a new memory
;    location.	The active part of the old stack is duplicated, so no
;    context is lost.  SetStack() also tickles the proper fields in the task
;    structure to tell the system about the change.  At this time it does
;    not deallocate the old stack.
;
;USAGE
;    Typically this is used by a process that needs a larger stack than it
;    might have been started with.  The stack size can be found with:
;
;    #include "libraries/dosextens.h"
;    ...
;    stack=*(ULONG *)( ((struct Process *)FindTask(0L))->pr_ReturnAddr );
;
;    Or in English, the long word at the address pointed to by pr_ReturnAddr.
;
;WARNINGS
;    A future revision of exec may do stack blowout checking every time a
;    process/task is switched out.  This protective feature will not be
;    available to programs that use funky methods of swapping stacks.
;
;    This only works for processes, tasks are not eligible.
;
;    Don't skimp on stack... you'll get burned.  Any call to the dos.library,
;    for example, takes just under 1600 bytes *minimum*.
;
;INPUTS
;    newstack - Pointer to memory block for stack.  Must be longword aligned.
;    size -	The size of the block.	Must be an even multiple of 4 bytes.
;
;SEE ALSO
;    AddTask(),AmigaLine6
|\ /|  . Ack! (NAK, SOH, EOT)
{o O} . bryce@hoser.berkeley.EDU -or- ucbvax!hoser!bryce (or try "cogsci")
 (")
  U	"As an engineer, I only set the value of a product... not the cost."
	-Bryce Nesbitt