[Info-vax] EXEC mode stack

[Stephen Hoffman]

On 2016-02-24 00:24:52 +0000, Lee Gleason said:

> "Stephen Hoffman"  wrote in message news:nagd8e$p56$1 at dont-email.me...
> On 2016-02-23 00:02:10 +0000, Lee Gleason said:
> 
> 
> 
>>> It's located via CTL$GL_STACK+4 (that's an array of pointers to the 
>>> four stacks), and the exec stack is sixteen pages.
> 
>   Thanks!

Allocate "enough" exec-writable memory somewhere, create a bogus stack 
frame there that'll reset the ESP back to the real stack, and then load 
the pointer with the address of the allocated memory.

Then hope that you don't hit something that needs to walk across the 
allocations, too.

Or PKAST into some other "victim" process for the code that needs more 
stack, and "borrow" the exec stack there.


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