Please help with GDB/PSIM and Redhat Linux

[Hoang Ngo]

I used the same psim-gdb script for both environments.
The on under slackware works but not the one under redhat.

Here is the content of psim_tree.hngo
/#address-cells 2
/openprom/options/oea-memory-size 8388608


Here is the result of running examples/ncurses/rain.exe
core_find_mapping() - access to unmaped address, attach a default map to
handle this - addr=0x38392d31 nr_bytes=0x1 processor=0x401a5008 cia=0xd828

The address 0xd828 is in the function <set_curterm>.

Followed your suggestion, i tried to uncommented some of the devices
in the psim-gdb script but the simulator doesn;t know about the device
sem or shm.

Hoang


-----Original Message----
From: Joel Sherrill [mailto:joel.sherrill at OARcorp.com]
Sent: Sunday, July 30, 2000 7:04 AM
To: hoanghngo at home.com
Cc: rtems-users at OARcorp.com
Subject: Re: Please help with GDB/PSIM and Redhat Linux




Hoang Ngo wrote:
> 
> I ran into a perflexing problem. At home i use Slackware7
> and rtems-4.5.0-beta3a, and rtems-packages-19991215
> compiled for GDB/PSIM. All the applications under ncurses
> directory ran fine (except that the terminal is not displaying
> what it supposed to). At work i use redhat-6.2 with all the same
> rtems packages but unable to get the ncurses applications to run.
> The error message indicates that the applications is accessing
> an unmapped region of memory (core_find_mapping() - access
> to unmaped address, attach a default map to handle this -
> addr=0x38392d31 nr_bytes=0x1 processor=0x401a5008 cia=0xf1dc).
> 
> If you have any suggestions as what to look for please drop me a line.

I think this is a matter of either one of two things:

 + You are not starting the simulator with all the device options.
   See the script psim/psim-gdb included with the BSP in the tools
   subdirectory.
 + I am not sure what instruction/inside what function the cia
   is pointing to but it might be an issue that the shared memory
   or semaphore is not being initialized correctly.

More than likely, it is the first since the shared mem/semapahore
is mapped to different processor address range. See what the
psim script does to initialize the simulator.

> TIA,
> Hoang

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985