Sequoia build with KDBG
sheflin at newagemicro.com
Sat Mar 1 11:36:35 EST 2008
At 05:51 PM 2/29/2008, you wrote:
>On Fri, 29 Feb 2008 17:31:10 -0500
>Steve Heflin <sheflin at newagemicro.com> wrote:
> > At 04:35 PM 2/29/2008, Josh Boyer wrote:
> > >On Fri, 29 Feb 2008 16:34:09 -0500
> > >Steve Heflin <sheflin at newagemicro.com> wrote:
> > >
> > > > I attempted to enable the kernel debugger on my Sequoia board, and I
> > > > get build errors:
> > > > /linux-2.6.25-rc3/arch/powerpc/kernel/setup_32.c:254: undefined
> > > > reference to `set_debug_traps'
> > > > /linux-2.6.25-rc3/arch/powerpc/kernel/setup_32.c:259: undefined
> > > > reference to `breakpoint'
> > > >
> > > > Josh: I assume you have used the kernel debugger with your 44x
> > > > boards, how did you build it?
> > >
> > >Why would you assume that? I've never used kgdb on arch/powerpc
> > >kernels, nor have I ever tried to build it.
> > I assumed that because I've always needed a debugger when
> > implementing kernel level components. Since you've implemented kernel
> > level support for several 44x processors, I just assumed that you
> > needed kdbg at some point. So you're saying that your additions
>Nope. I did the poor man's method of manually poking characters out of
>the serial port.
> > worked right out of the gate and you never needed a
> debugger? You're my hero!
>I largely stood on the shoulders of those that came before me. Porting
>has become trivial lately, mostly due to the collective work lots of
>people have put in.
>That all being said, I'm not opposed to having kgdb work on 4xx. I
>just have never personally looked at it yet. Patches welcome :).
poor man's debugging works fine if a serial port is available, but my
Sequoia platform doesn't get that far! I use u-boot to download and
boot my image, and I don't get any serial output after the boot completes:
=> bootm 0x500000
## Booting image at 00500000 ...
Image Name: Kernel and Ramdisk
Created: 2008-03-01 0:09:57 UTC
Image Type: PowerPC Linux Multi-File Image (gzip compressed)
Data Size: 2430248 Bytes = 2.3 MB
Load Address: 00000000
Entry Point: 00000000
Image 0: 1471523 Bytes = 1.4 MB
Image 1: 958712 Bytes = 936.2 kB
Verifying Checksum ... OK
Uncompressing Multi-File Image ... OK
Loading Ramdisk to 07e42000, end 07f2c0f8 ... OK
console port is now dead.
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