gcc bug? Gcc of 2.95.[3-4] miscompiles kernels.
The versions 2.95.3-5 and 2.95.4-8 of gcc may miscompile
kernels, because kernels compiled by those versions of gcc could not
boot at all on DP264 SMP in the following, but by the old version
2.95.2-13 can boot without any problem.
> * To: debian-alpha@lists.debian.org,
> miyazawa@smi6m.smlab.sci.gunma-u.ac.jp
> * Subject: SMP kernel for UP2000 833MHZ 2-cpus
> * From: Sanzo Miyazawa <miyazawa@smlab.sci.gunma-u.ac.jp>
> * Date: Mon, 22 Oct 2001 10:27:29 +0900
>
>Does anyon know why all versions of kernels (2.4.4 -- 2.4.13-pre)
>cannot boot on alpha with UP2000 2-cpu (of both 833MHZ and 750MHZ versions) ?
> =====
>
>(Most recent version of kernel which could boot on this system
>is 2.4.2-pre3.)
>
>(kernels with no smp option can boot without any problem. )
>
>Linux Kernel
> version 2.4.2-pre3 No problem
>
> 2.4.4 with various versions of ac cannot boot
> 2.4.5-pre1 cannot boot
> 2.4.5-ac19 cannot boot
> ...
>
> 2.4.11-pre2 cannot boot
> 2.4.11-pre6 cannot boot
> 2.4.13-pre2 cannot boot
>
>------------ Error log displayed during booting the kernel ----------
>POSIX conformance testing by UNIFIX
>Unable to handle kernel paging request at virtual address
>0000000000000000
>CPU0 swapper(0);Oops 0
>
> dump of the content of cpu register
>
>kernel panic : attempted to kill the idle task
>In idle task - not syncing
>
>-------------System Information --------------------------------------
>aboot:
>dpkg -l aboot
>+++-==============-==============-============================================
>ii aboot 0.7a-1 Linux bootloader for the SRM console
>
>Hardware:
>cpu : Alpha
>cpu model : EV68AL
>cpu variation : 7
>cpu revision : 0
>cpu serial number :
>system type : Tsunami
>system variation : DP264
>system revision : 0
>system serial number :
>cycle frequency [Hz] : 833333333
>timer frequency [Hz] : 1024.00
>page size [bytes] : 8192
>phys. address bits : 44
>max. addr. space # : 255
>BogoMIPS : 1670.76
>kernel unaligned acc : 0 (pc=0,va=0)
>user unaligned acc : 216 (pc=120003e98,va=200000a7aca)
>platform string : UP2000+ 833 MHz
>cpus detected : 2
>cpus active : 2
>cpu active mask : 0000000000000003
>
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