Date: Thu, 5 Apr 2001 23:06:42 -0400 (EDT) From: Zhihui Zhang <zzhang@cs.binghamton.edu> To: Hiroaki Yamazaki <yamazaki.hiroaki@kcn.ts.fujitsu.co.jp> Cc: questions@FreeBSD.ORG Subject: Re: ptrace(PT_GETDBREGS) failed Message-ID: <Pine.SOL.4.21.0104052305150.22692-100000@opal> In-Reply-To: <001101c0be44$c677d6d0$a65017ac@bc.kcn.ts.fujitsu.co.jp>
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On Fri, 6 Apr 2001, Hiroaki Yamazaki wrote:
> Dear sir,
>
> I'm very new to FreeBSD.
> I'm tracing kernel source code of FreeBSD4.2 with remote GDB debug
> function which instructed by user hand book section 23.5.
>
> At every time after hit break point and continue, following message
> ,ptrace(PT_GETDBREGS) failed: No such process, appear on gdb display.
> Why and how to solve this ?
>
>
>
> kgdb) b key_timehandler
> Breakpoint 2 at 0xc023d001: file ../../netkey/key.c, line 4018.
> (kgdb) c
> Continuing.
> ptrace(PT_GETDBREGS) failed: No such process <--- Here
> Breakpoint 2, key_timehandler () at ../../netkey/key.c:4018
> (kgdb) p/x procfs_validdbregs
> $5 = {int (struct proc *)} 0xc01e47a4 <procfs_validdbregs>
> (kgdb) p/x *procfs_validdbregs
I posted the same messages a while ago. Please search the archive for
details. It is basically harmless.
-Zhihui
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