Re: gdb on IBM Walnut board panics the kernel

"Curry, Diane" wrote:

I'm running Monta Vista's Hard Hat Linux (11/26/200 2.4.0-test2) on an
IBM 405GP walnut rev D board. On an x86 PC running Red Hat Linux 7.0,
using MV's CDK, I built a small program using ppc_4xx-gcc with the -g
switch.
The executable is in /tmp of the root filesystem
(/opt/hardhat/devkit/ppc/4xx/target)
that is exported for the target linux to nfs mount. The program, when
run by itself, runs fine.  However, when running gdb on the program, the
kernel panics (explicitly setting
breakpoints produces the same result).
Has anyone observed similar behavior or recognize the possible cause?
Any suggestions would be greatly appreciated.

Diane Curry
Infiniswitch Corp.
dcurry@infiniswitch.com

Yes, this is a known problem.  (It's described in the README file in the
top directory of the CDK.)  The problem is that ptrace is not yet
implemented for the 4xx processors.  I have ptrace working in an old
version of the kernel, but haven't yet moved it forward to a current
kernel and cleaned up the implementation.  This is a very high priority
item for completion.

-Frank
--
Frank Rowand [off-list ref]
MontaVista Software, Inc

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