linux-kernel - Re: 2.6.19-rc1: kexec broken on x86

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Date:	Thu, 5 Oct 2006 22:56:51 +0900
From:	"Magnus Damm" <magnus.damm@...il.com>
To:	vgoyal@...ibm.com
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	fastboot@...ts.osdl.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Horms <horms@...ge.net.au>, "Magnus Damm" <magnus@...inux.co.jp>
Subject: Re: 2.6.19-rc1: kexec broken on x86_64

Hi Vivek,

On 10/5/06, Vivek Goyal <vgoyal@...ibm.com> wrote:
> On Thu, Oct 05, 2006 at 07:28:35PM +0900, Magnus Damm wrote:
> > Kexec is broken on x86_64 under 2.6.19-rc1.
> >
> > Or rather - kexec works ok under 2.6.19-rc1, but something related to
> > the vmlinux format has probably changed and kexec-tools fails to load
> > a vmlinux from 2.6.19-rc1.
> >
> > Loading bzImage works as usual, but vmlinux does not load properly.
> >
> > The kexec binary fails with the following message:
> >
> > Overlapping memory segments at 0x351000
> > sort_segments failed
> > / #
> >
>
> Hi Magnus,
>
> Can you please post the readelf -l output of the vmlinux you are trying
> to load. That's will give some indication if the segments are really
> overlapping in vmlinux or is it some processing bug at kexec-tools part.

Elf file type is EXEC (Executable file)
Entry point 0x100100
There are 4 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOAD           0x0000000000100000 0xffffffff80100000 0x0000000000100000
                 0x00000000001a4888 0x00000000001a4888  R E    100000
  LOAD           0x00000000002a5000 0xffffffff802a5000 0x00000000002a5000
                 0x000000000008e086 0x00000000000c1504  RWE    100000
  LOAD           0x0000000000400000 0xffffffffff600000 0x00000000002fd000
                 0x0000000000000c08 0x0000000000000c08  RWE    100000
  NOTE           0x0000000000000000 0x0000000000000000 0x0000000000000000
                 0x0000000000000000 0x0000000000000000  R      8

 Section to Segment mapping:
  Segment Sections...
   00     .text __ex_table .rodata .pci_fixup __ksymtab __ksymtab_gpl
__ksymtab_unused __ksymtab_strings __param
   01     .data .data.cacheline_aligned .data.read_mostly
.data.init_task .data.page_aligned .init.text .init.data .init.setup
.initcall.init .con_initcall.init .altinstructions
.altinstr_replacement .exit.text .init.ramfs .bss
   02     .vsyscall_0 .xtime_lock .vxtime .vgetcpu_mode .sys_tz
.sysctl_vsyscall .xtime .jiffies .vsyscall_1 .vsyscall_2 .vsyscall_3
   03

Thanks,

/ magnus
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