Reverse the direction of stack growth

[PhDUCSB]

I am using PISA (subset of mips). I am trying to make both the heap and the
stack grows in the same direction. Now, my compiler is working but
unfortunately it is working wrong. Do you know a way I could debug my code?
Any help is really appreciated. Thanks.


 

Ian Lance Taylor-3 wrote:
> 
> PhDUCSB <eng.hmohsen@gmail.com> writes:
> 
>> Ian Lance Taylor-3 wrote:
>>> 
>>> PhDUCSB <eng.hmohsen@gmail.com> writes:
>>> 
>>>> I am trying to modify the gcc backend to reverse the stack growth
>>>> direction.
>>>> Do you think this is an easy task to do?
>>> 
>>> It kind of depends on the backend.  It's easy to change what the
>>> middle-end cares about--just undefine STACK_GROWS_DOWNWARD.  You'll have
>>> to make sure that the backend does all the right things in the function
>>> prologue and epilogue code.
>>
>> Thanks for that tip. I tried doing that but the problem right now is that
>> both compilers( the original and mine) produce the same executable
>> regardless of any modifications I have done. I really have no clue.
>> Please
>> help.
> 
> We can't help you without a lot more information.  What backend are
> you using?  What are you really trying to do?
> 
> The stack direction is normally built into a backend in many different
> ways, so if you want to change an existing backend, you should expect
> to change many different places.  This is not a task to be undertaken
> lightly, without a detailed knowledge of gcc backend implementations.
> 
> Ian
> 
> 

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