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    SubjectRe: [PATCH 1/2] x86_64: Reflect the relocatability of the kernel in the ELF header.
    Vivek Goyal <> writes:

    > On Mon, Apr 30, 2007 at 05:17:07PM +0200, Andi Kleen wrote:
    >> On Monday 30 April 2007 17:12:39 Eric W. Biederman wrote:
    >> >
    >> > Currently because vmlinux does not reflect that the kernel is relocatable
    >> > we still have to support CONFIG_PHYSICAL_START. So this patch adds a small
    >> > c program to do what we cannot do with a linker script set the elf header
    >> > type to ET_DYN.
    >> >
    >> > Since last time I have fixed the type to be in my code ET_DYN (oops),
    >> > and verified this works with kexec. I realized while testing that we
    >> > don't have anyway of identifying a kernel vmlinux as linux so we
    >> > probably want to add an ELF note but that will be another patch.
    >> The patch is ok for me, but does it pass Vivek's usual testing?
    > I am facing one issue with this patch. gdb can not analyze the
    > resulting kernel core file. Looks like gdb treats vmlinux differently if
    > ELF header type is "ET_DYN". It reads the symbol values incorrectly.


    > For example, symbol value of "panic_timeout" is 0xffffffff808a1fa8 but
    > gdb somehow things that it is 0xffffffff008aaebf. Looks like it is
    > performing some relocation.
    > I am using GNU gdb Red Hat Linux (6.5-5.fc6rh).

    Does it take a kernel core file to reproduce this problem?
    Or can you just open up gdb on a vmlinux and look at the symbol

    At least without a core file it is working on with gdb 6.4.

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      Last update: 2007-05-01 06:25    [W:0.021 / U:2.040 seconds]
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