Changes between Initial Version and Version 5 of Ticket #3885


Ignore:
Timestamp:
02/26/20 08:51:14 (4 years ago)
Author:
Sebastian Huber
Comment:

Legend:

Unmodified
Added
Removed
Modified

  • Ticket #3885 – Description

    initial v5  
    2929
    3030Fixing this is not straight forward. The context switch extensions call must move after the low-level context switch. The problem here is that we may end up in _Thread_Handler(). Adding the context switch extensions call to _Thread_Handler() covers now also the thread switch to the initialization thread. We also have to save the last executing thread of the processor. Registers or the stack cannot be used for this purpose. We have to add it to the per-processor information. Existing extensions may be affected, since now context switch extensions use the stack of the heir thread.
     31
     32Calling the thread switch extensions in the low level context switch is difficult since at this point an intermediate stack is used which is only large enough to enable servicing of interrupts.