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Groups > comp.lang.java.programmer > #19628

Re: Creating a new stack from an exisiting one.

Cross-posted to 2 groups.

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On 11/4/2012 4:14 AM, Pascal J. Bourguignon wrote:

> Ben Bacarisse <ben.usenet@bsb.me.uk> writes:
>
>> I think you are probably confusing yourself by writing []s and calling
>> the contents a stack.  I am still not sure what you want, but the new
>> words "runStack" and "framePointers" and the function call example put
>> this in a context I understand.


> Well, I don't know of any processor that uses a separate stack for the
> frame pointers.  See for example the instructions LINK and UNLK of the
> 680x0 (there are similar instructions on X86 and others).  The top frame
> pointer is usually kept in A6, while the stack pointer is A7=SP.


After reviewing some of the diagrams and information on call stacks on 
wikipedia, I wonder if Chad is mistakenly calling the second "stack" is 
actually a register file.  It seems sensible for a routine to receive 
two data structures, one stack and one set of registers, to simulate 
execution.  One register would normally be choose to point to the start 
of the current stack frame, which seems similar to what he is describing.

He could also be confused and assuming that the current stack frame is 
separate from the main call stack, which isn't normally the case.  These 
are really the only two ideas I have here.

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Thread

Creating a new stack from an exisiting one. Chad <cdalten@gmail.com> - 2012-11-03 07:45 -0700
  Re: Creating a new stack from an exisiting one. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-11-03 15:51 +0000
    Re: Creating a new stack from an exisiting one. Chad <cdalten@gmail.com> - 2012-11-03 09:22 -0700
      Re: Creating a new stack from an exisiting one. markspace <-@.> - 2012-11-03 11:20 -0700
      Re: Creating a new stack from an exisiting one. "BartC" <bc@freeuk.com> - 2012-11-03 18:58 +0000
      Re: Creating a new stack from an exisiting one. "Pascal J. Bourguignon" <pjb@informatimago.com> - 2012-11-04 00:49 +0100
      Re: Creating a new stack from an exisiting one. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-11-04 00:44 +0000
        Re: Creating a new stack from an exisiting one. "Pascal J. Bourguignon" <pjb@informatimago.com> - 2012-11-04 13:14 +0100
          Re: Creating a new stack from an exisiting one. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-11-04 12:48 +0000
            Re: Creating a new stack from an exisiting one. Thomas Richter <thor@math.tu-berlin.de> - 2012-11-04 14:14 +0100
              Re: Creating a new stack from an exisiting one. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-11-04 15:38 +0000
            Re: Creating a new stack from an exisiting one. "Pascal J. Bourguignon" <pjb@informatimago.com> - 2012-11-04 14:41 +0100
          Re: Creating a new stack from an exisiting one. "BartC" <bc@freeuk.com> - 2012-11-04 14:11 +0000
            Re: Creating a new stack from an exisiting one. "Pascal J. Bourguignon" <pjb@informatimago.com> - 2012-11-04 16:00 +0100
          Re: Creating a new stack from an exisiting one. markspace <-@.> - 2012-11-04 11:02 -0800
          Re: Creating a new stack from an exisiting one. Martin Gregorie <martin@address-in-sig.invalid> - 2012-11-04 19:56 +0000
    Re: Creating a new stack from an exisiting one. Jeff Higgins <jeff@invalid.invalid> - 2012-11-03 16:46 -0400
      Re: Creating a new stack from an exisiting one. Jeff Higgins <jeff@invalid.invalid> - 2012-11-04 08:22 -0500
        Re: Creating a new stack from an exisiting one. Jeff Higgins <jeff@invalid.invalid> - 2012-11-04 11:30 -0500
          Re: Creating a new stack from an exisiting one. Jeff Higgins <jeff@invalid.invalid> - 2012-11-04 19:40 -0500
  Re: Creating a new stack from an exisiting one. Lew <lewbloch@gmail.com> - 2012-11-03 16:02 -0700

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