Felix Radensky wrote:
>
> [EMAIL PROTECTED] wrote:
>
> > On Thu, Oct 28, 1999 at 01:21:07PM +0200, Felix Radensky wrote:
> > > Hi,
> > >
> > > I've applied rtl v1.3 to linux-2.0.37 and changed
> > > CFLAGS to -Wall -Wstrict-prototypes -O2 -fno-omit-frame-pointer
> > > -fno-strength-reduce
> > > The difference is -fno-omit-frame-pointer flag, that is needed for
> > > proper stack trace
> > > debugging. The kernel just cannot boot. The normal kernel boots fine.
> > > Any ideas would
> > > be greatly appreciated.
> >
> > Do you mean that the normal kernel boots fine when compiled with those
>
> Exactly. Some kernel debuggers require kernel to be compiled with -g
> -fno-omit-frame-pointers
> in order for stack backtracing to work properly. This is true for kdb
> (http://reality.sgi.com/slurn_engr/)
> and ikd (ftp://e-mind.com/pub/andrea/ikd/). GCC-HOWTO also says that
> -fno-omit-frame-pointers
> should be used for debugging.
> Normal kernels (I've tried 2.0.35, 2.0.36 & 2.0.37 ) when compiled with
> this flag (gcc-2.7.2.3) boot
> ok. With kernels patched with rtl (v1.2 & v1.3) the system prints
> "Loading linux ..." and reboots immediately.
>
> By the way, 2.2.13 kernel patched with rtl v2.0 and compiled with
> -fno-omit-frame-pointers has no problems booting. But since we use
> 2.0.x series kernel, it would be nice to have rtl working as expected
> with these kernels also.
>
Hi Felix,
I don't know if this helps you, but I use a modified gsbstubs patch to
do Linux kernel debugging. The combination I use is Linux 2.0.36 + RTL
0.9J (which are close to what you have). If I look in the Linux
Makefile, the CFLAGS are:
CFLAGS = -Wall -Wstrict-prototypes -O2 -g -fomit-frame-pointer
-fno-strength-reduce
This work without any problem, using host/target debug over a serial
line (the host has the unstripped vmlinux, the target the zImage).
The gsbstubs package can be found at:
ftp://ftp.gcom.com/pub/linux/src/gdbstub-2.0.36/
Note: this works for 2.2 as well despite the name.
Regards
Stuart.
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