Re: Early kernel debugging

2011-03-27 Thread Benjamin Herrenschmidt
On Sun, 2011-03-27 at 20:00 +0200, Philipp Ittershagen wrote: > On 03/25/2011 09:50 AM, Guillaume Dargaud wrote: > > Hello all, > > what can you do when the kernel you try to run stops before printing > > anything on the console ? > > http://elinux.org/Kernel_Debugging_Tips#Debugging_early_boot_p

Re: Early kernel debugging

2011-03-27 Thread Philipp Ittershagen
On 03/25/2011 09:50 AM, Guillaume Dargaud wrote: > Hello all, > what can you do when the kernel you try to run stops before printing anything > on the console ? http://elinux.org/Kernel_Debugging_Tips#Debugging_early_boot_problems Basically it means connecting a debugger to the running kernel (u

Early kernel debugging

2011-03-25 Thread Guillaume Dargaud
Hello all, what can you do when the kernel you try to run stops before printing anything on the console ? I tried enabling the 'early printk' option, but still I get nothing. I posted something about it in the 'Booting with ramdisk in kernel' message and I haven't improved the situation since

Re: early kernel debugging

2009-04-03 Thread Feng Kan
ld check my bootargs for correct params. -Original Message- From: linuxppc-dev-bounces+tmarri=amcc@ozlabs.org [mailto:linuxppc-dev-bounces+tmarri=amcc@ozlabs.org] On Behalf Of Yigal Goldberger Sent: Thursday, April 02, 2009 1:06 PM To: linuxppc-dev@ozlabs.org Subject: early kernel deb

RE: early kernel debugging

2009-04-03 Thread Tirumala Reddy Marri
ril 02, 2009 1:06 PM To: linuxppc-dev@ozlabs.org Subject: early kernel debugging Hi All, I'm using u-boot to boot kernel 2.6.24.2 on a powerpc based board . I see that after uncompressing the kernel it hangs. I found a location (System.map) I think corresponds to the __log_buf (my SDRAM sta

early kernel debugging

2009-04-02 Thread Yigal Goldberger
Hi All, I'm using u-boot to boot kernel 2.6.24.2 on a powerpc based board . I see that after uncompressing the kernel it hangs. I found a location (System.map) I think corresponds to the __log_buf (my SDRAM starts at physical address 0 (and u-boot performs -> Load Address: Entry Point: