Re: [Fastboot] [CFT] ELF Relocatable x86 and x86_64 bzImages
- From: Vivek Goyal <vgoyal@xxxxxxxxxx>
- Date: Mon, 31 Jul 2006 17:00:50 -0400
On Mon, Jul 31, 2006 at 04:25:20PM -0400, Vivek Goyal wrote:
On Mon, Jul 31, 2006 at 10:19:04AM -0600, Eric W. Biederman wrote:
Hi Eric,
I have spent some time and have gotten my relocatable kernel patches
working against the latest kernels. I intend to push this upstream
shortly.
Could all of the people who care take a look and test this out
to make certain that it doesn't just work on my test box?
Currently I am testing your patches on i386. With CONFIG_RELOCATABLE=y
kernel boots fine and kexec also works.
But my kernel hangs on kexec on panic case. It hangs early in
decompress_kernel(). Kernel hangs at following condition.
+ if (((u32)output - CONFIG_PHYSICAL_START) & 0x3fffff)
+ error("Destination address not 4M aligned");
Ok. I am decompressing the kernel to 16MB and after reducing 1MB of
CONFIG_PHYSICAL_START I am left with 15MB which is not 4M aligned
hence I seems to be running into it.
I changed it to
if ((u32)output) & 0x3fffff)
and kdump kernel booted fine. But this will run into issues if I load
kernel at 1MB.
I got a dump question. Why do I have to load the kernel at 4MB alignment?
Existing kernel boots loads at 1MB, which is non 4MB aligned and it works
fine?
Thanks
Vivek
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- References:
- [CFT] ELF Relocatable x86 and x86_64 bzImages
- From: Eric W. Biederman
- Re: [CFT] ELF Relocatable x86 and x86_64 bzImages
- From: Vivek Goyal
- [CFT] ELF Relocatable x86 and x86_64 bzImages
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