de-referencing l4lx linear addresses

Adam Lackorzynski adam at
Mon Jul 11 21:59:25 CEST 2005

On Mon Jul 11, 2005 at 12:17:03 -0400, Andrew Davenport wrote:
> I had an idea I wanted to try out:  Taking the esp register from the task state,
> then masking off the bits (basically perform the current() macro as the linux
> kernel does) to obtain the address of the task_struct of the currently runnning

In 2.6 the task struct is not on the stack but a structure called
thread_info. One can find the task_struct from the thread_info struct.

> process.  I have a stripped down sched.h which contians the declaration of the
> struct task_struct { ... } inside .../fiasco/src/kern (i am modifying
> thread-ipc.cpp).  However, the compiler compains that "Struct task struct" is
> undefined.

Well, hard to say. Go the build directory and issue "make thread-ipc.i"
and look at the generated file if the contents are ok. The .i file
contains the contents after cpp went over it.

Adam                 adam at

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