gdb on 2.2/2.4

Filipau, Ihar (ifilipau@sussdd.de)
Thu, 10 Apr 2003 14:52:35 +0100


Hello!

[ CC me please - I'm not subscribed ]

Couple of issues. I hope RH8 kernels not much /patched/
comparing to vanilla in this respect.

1. gdb doesn't work on 2.4 - if app got SIGSEGV - I cannot see
backtrace of random thread. I have mutli-threaded app - but
gdb cannot access any other thread - only main thread.

2. on 2.4 + ptrace() security fix, gdb on signal prints error
message: "Couldn't access registers: permission denied".
and sure only 'quit' works correctly after this.

In both cases it is run from user account.

Does any-one has any clue how to make gdb working on rh8?
I have tried to use vanilla kernel - but have no succes to
date...

I'm not much about debugging - but finding a
SIGSEGV/SIGILL source is much more faster with gdb.

P.S. System: SMP/PIII (Tried in both smp/nosmp), RH8 std kernel,
RH8 updated kernel, 2.4.20. gcc 3.2/3.2.2, gdb 5.3.

--- Regards&Wishes! With respect Ihar "Philips" Filipau, and Phil for
friends

- - - - - - - - - - - - - - - - - - - - - - - - -
MCS/Mathematician - System Programmer
Ihar Filipau
Software entwickler @ SUSS MicroTec Test Systems GmbH,
Suss-Strasse 1, D-01561 Sacka (bei Dresden)
e-mail: ifilipau@sussdd.de tel: +49-(0)-352-4073-327
fax: +49-(0)-352-4073-700 web: http://www.suss.com/
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