Messages in this thread | | | Date | Thu, 5 Oct 2006 10:24:00 -0400 | From | Vivek Goyal <> | Subject | Re: 2.6.19-rc1: kexec broken on x86_64 |
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On Thu, Oct 05, 2006 at 10:56:51PM +0900, Magnus Damm wrote: > Hi Vivek, > > On 10/5/06, Vivek Goyal <vgoyal@in.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 >
Ok. So second and third program header are overlapping in physical address space and that's why kexec-tools is cribbing.
Looking at these headers, it looks like program header 02 which contains will overwrite some of the data of program header 01 and I think that's wrong. Will look more into it.
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