Interesting... I will need to look into this unless you want to...

Michael Tokarev <m...@tls.msk.ru> wrote:

>On 11.05.2012 22:19, Julien Cristau wrote:
>> Package: syslinux-common
>> Version: 2:4.05+dfsg-3
>> Severity: grave
>> Tags: d-i
>> Justification: renders package unusable
>> 
>> Steps to reproduce:
>> - in a d-i checkout, run "make -C build build_netboot"
>> - boot the resulting build/dest/netboot/mini.iso
>> 
>> With 2:4.05+dfsg-2 I get the expected boot menu.  With -3 nothing
>> happens, with the CPU apparently spinning without making progress. 
>This
>> badly affects the d-i dailies.
>
>This happens when syslinux is compiled using gcc-4.7.
>The same code compiled using 4.6 works fine.  4.7 produces
>non-working pxelinux and regular ldlinux.  When pxelinux.0
>is run inside qemu-kvm virtual machine, i see the following:
>
>...
>!PXE entry point found (we hope) at 9BE2:0456 via plan A
>UNDI code segment at 9BE2 len 08A8
>UNDI data segment at 9C6D len 2D28
>Getting cached packet  01 02 03
>My IP address seems to be C0A8583C 192.168.88.60
>ip=192.168.88.60:192.168.88.4:192.168.88.4:255.255.255.0
>BOOTIF=01-52-54-00-12-34-56
>SYSUUID=00000000-0000-0000-0000-000000000000
>TFTP prefix:
>Trying to load: pxelinux.cfg/default                                ok
>_
>
>And the machine stays at this place eating 100% CPU -
>most of the time.  Sometimes qemu-kvm produces the
>following:
>
>KVM internal error. Suberror: 1
>emulation failure
>EAX=00016b40 EBX=00016b40 ECX=00000000 EDX=00016b30
>ESI=00015e30 EDI=00016b40 EBP=c006fd4c ESP=00000002
>EIP=00000008 EFL=00000007 [-----PC] CPL=0 II=0 A20=1 SMM=0 HLT=0
>ES =9c6d 0009c6d0 ffffffff 00809300
>CS =0000 00000000 ffffffff 00809b00
>SS =9c6d 0009c6d0 ffffffff 00809300
>DS =9c6d 0009c6d0 ffffffff 00809300
>FS =9c6d 0009c6d0 ffffffff 00809300
>GS =9c6d 0009c6d0 ffffffff 00809300
>LDT=0000 00000000 0000ffff 00000000
>TR =0008 00000580 00000067 00008b00
>GDT=     0009c730 00000037
>IDT=     00000000 0000ffff
>CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
>DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
>DR3=0000000000000000
>DR6=00000000ffff0ff0 DR7=0000000000000400
>EFER=0000000000000000
>Code=00 00 00 00 00 00 00 00 <ff> ff ff 80 00 00 00 00 02 00 00 00 51
>c2 16 00 00 00 00 00 00 00 00 40 00 00 00 00 02 00 00 00 42 bf 16 00 00
>00 00 00 f0 90
>
>FWIW.
>
>Thanks,
>
>/mjt

-- 
Sent from my mobile phone. Please excuse brevity and lack of formatting.



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