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Bug #5223
openkernel panic at early boot stage
Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Start date:
2014-10-09
Due date:
% Done:
0%
Estimated time:
Difficulty:
Medium
Tags:
needs-triage
Gerrit CR:
Description
Speaking shortly, a new illumos code does not work on old CPUs such as p3
I have such PC:
The physical processor has 1 virtual processor (0) x86 (GenuineIntel 68A family 6 model 8 step 10 clock 1000 MHz) Intel(r) Pentium(r) III
Yes, I know that it is very old for modern system, but it works (still!)
ok, the latest OI that I can boot on it was oi151a8 (ISO from the site)
after updading (pkg update) a new BE cannot be booted:
panic[cpu0]/thread=d4984da0: BAD TRAP: type=6 (#ud Invalid opcode) rp=d4988d40 addr=fec24008 #ud Invalid opcode addr=0xfec24008 pid=0, pc=0xfe85b25e, sp=0xfe86adbc, eflags=0x10082 cr0: 80050011<pg,wp,et,pe> cr4: d8<pge,mce,pse,de> cr2: 0 cr3: 3113000 gs: fec201b0 fs: fec40000 es: fe850160 ds: fe850160 edi: d4984da0 esi: fec24008 ebp: fec402b4 esp: d4988d78 ebx: fec24008 edx: d3195f68 ecx: fe7fc000 eax: d4984df4 trp: 6 err: 0 eip: fe85b25e cs: 158 eflg: 10082 usp: fe86adbc ss: 0 Warning - stack not written to the dumpbuf panic: entering debugger (no dump device, continue to reboot) Welcome to kmdb Loaded modules: [ mac uppc unix krtld apix genunix specfs pcplusmp cpu.generic ]
Detailed analysis of the addresses gave me the point to module and function:
eip: fe85b25e (unix)
I disassembled this module and I found the code:
fe85b230 <_resume_from_idle>: fe85b230: f0 0f ba 6f 6c 00 lock btsl $0x0,0x6c(%edi) fe85b236: 0f 82 ac 00 00 00 jb fe85b2e8 <resume_return+0x4> fe85b23c: 65 8b 35 0c 00 00 00 mov %gs:0xc,%esi *skipped* fe85b25b: 89 7e 10 mov %edi,0x10(%esi) fe85b25e: 0f ae f0 mfence fe85b261: 33 ed xor %ebp,%ebp *skipped*
Bingo! mfence is a SSE2 instruction that my CPU does not "understand"
This functions was found in uts/intel/ia32/ml/swtch.s
https://github.com/illumos/illumos-gate/blob/master/usr/src/uts/intel/ia32/ml/swtch.s#L525
yeah, I know what you say, it's time to upgrade your hardware ;-)
thanks anyway
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