2004-09-08 07:06:51

by Mithlesh Thukral

[permalink] [raw]
Subject: Problem of debugging modules on x86_64 platform using KGDB

hi,
On the x86_64 platform we faced a problem of debugging modules using
KGDB.
For working around the problem, we need the compile the file
'arch/x86_64/kernel/vsyscall.c' without the generation of debugging
information.
For this i moved the 'vsyscall.c' from the directory
'arch/x86_64/kernel' to a new directory 'arch/x86_64/kernel/vsyscall/' .
The make file in this new directory does not generate the debugging
information for the file 'vsyscall.c'.
Please let me know if there is some other way by which i can specify a
different set of compilation flags for a single file in the directory.
this will help me in not moving the file in a new directory.

Regards,
Mithlesh Thukral


Attachments:
vsyscall.patch (11.51 kB)

2004-09-08 07:18:12

by Sam Ravnborg

[permalink] [raw]
Subject: Re: Problem of debugging modules on x86_64 platform using KGDB

On Wed, Sep 08, 2004 at 12:31:31PM +0530, Mithlesh Thukral wrote:
> hi,
> On the x86_64 platform we faced a problem of debugging modules using
> KGDB.
> For working around the problem, we need the compile the file
> 'arch/x86_64/kernel/vsyscall.c' without the generation of debugging
> information.
> For this i moved the 'vsyscall.c' from the directory
> 'arch/x86_64/kernel' to a new directory 'arch/x86_64/kernel/vsyscall/' .
> The make file in this new directory does not generate the debugging
> information for the file 'vsyscall.c'.
> Please let me know if there is some other way by which i can specify a
> different set of compilation flags for a single file in the directory.
> this will help me in not moving the file in a new directory.

In arch/x86_64/kernel/Makfile:
CFLAGS_vsyscalls.o := -g0

That should do the trick.

Use make V=1 to check which flags are passed to gcc.
See also Documentation/kbuild/makefiles.txt for reference.

Sam