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Re: mutex fault
On Nov 25, 14:24, Kazushi (Jam) Marukawa wrote:
> Subject: Re: mutex fault
> On Nov 24, 17:59, Manuel Bouyer wrote:
> > Also please build a kernel with
> > makeoptions DEBUG="-g"
> >
> > and use gdb to see where callout_softclock+0x24d (or whatever adress
is given
> > by ddb with this kernel on panic) is. On my kernel image it points to
> > a mutex_enter which doens't make much sense ...
>
> I'll try that. Thanks.
Here is a disassembled output of netbsd.gdb I compiled with
the same source and with -g option.
The codes around callout_softclock+0x24d
(callout_softclock+589) are like following.
0xc0431515 <callout_softclock+581>: je 0xc043151d
<callout_softclock+589>
0xc0431517 <callout_softclock+583>: mov %edi,(%esp)
0xc043151a <callout_softclock+586>: call *0xffffffec(%ebp)
0xc043151d <callout_softclock+589>: movl $0xc098d594,(%esp)
0xc0431524 <callout_softclock+596>: call 0xc04db580 <mutex_spin_enter>
0xc0431529 <callout_softclock+601>: mov 0xffffffe8(%ebp),%eax
Whole disassemble of callout_softclock function is below.
Thanks.
(gdb) disassemble callout_softclock
Dump of assembler code for function callout_softclock:
0xc04312d0 <callout_softclock+0>: push %ebp
0xc04312d1 <callout_softclock+1>: mov %esp,%ebp
0xc04312d3 <callout_softclock+3>: push %edi
0xc04312d4 <callout_softclock+4>: push %esi
0xc04312d5 <callout_softclock+5>: push %ebx
0xc04312d6 <callout_softclock+6>: sub $0x1c,%esp
0xc04312d9 <callout_softclock+9>: mov 0xc092a578,%eax
0xc04312de <callout_softclock+14>: mov %eax,0xfffffff0(%ebp)
0xc04312e1 <callout_softclock+17>: mov 0xc(%eax),%edx
0xc04312e4 <callout_softclock+20>: mov %edx,0xffffffe8(%ebp)
0xc04312e7 <callout_softclock+23>: movl $0xc098d594,(%esp)
0xc04312ee <callout_softclock+30>: call 0xc04db580 <mutex_spin_enter>
0xc04312f3 <callout_softclock+35>: cmpl $0xc09623c0,0xc09623c0
0xc04312fd <callout_softclock+45>: je 0xc0431443
<callout_softclock+371>
0xc0431303 <callout_softclock+51>: lea 0x0(%esi),%esi
0xc0431309 <callout_softclock+57>: lea 0x0(%edi),%edi
0xc0431310 <callout_softclock+64>: mov 0xc09623c0,%esi
0xc0431316 <callout_softclock+70>: cmpl $0x11deeba1,0x24(%esi)
0xc043131d <callout_softclock+77>: jne 0xc04315f2
<callout_softclock+802>
0xc0431323 <callout_softclock+83>: mov 0x8(%esi),%ecx
0xc0431326 <callout_softclock+86>: test %ecx,%ecx
0xc0431328 <callout_softclock+88>: je 0xc043161e
<callout_softclock+846>
0xc043132e <callout_softclock+94>: testb $0x2,0x1c(%esi)
0xc0431332 <callout_softclock+98>: je 0xc043164a
<callout_softclock+890>
0xc0431338 <callout_softclock+104>: testb $0x4,0x1c(%esi)
0xc043133c <callout_softclock+108>: jne 0xc0431676
<callout_softclock+934>
0xc0431342 <callout_softclock+114>: mov (%esi),%eax
0xc0431344 <callout_softclock+116>: mov 0x4(%esi),%edx
0xc0431347 <callout_softclock+119>: mov %edx,0x4(%eax)
0xc043134a <callout_softclock+122>: mov 0x4(%esi),%edx
0xc043134d <callout_softclock+125>: mov %eax,(%edx)
0xc043134f <callout_softclock+127>: mov 0x18(%esi),%edx
0xc0431352 <callout_softclock+130>: mov 0xc098ac20,%ecx
0xc0431358 <callout_softclock+136>: mov %edx,%eax
0xc043135a <callout_softclock+138>: sub %ecx,%eax
0xc043135c <callout_softclock+140>: cmp $0x0,%eax
0xc043135f <callout_softclock+143>: jle 0xc04314d0
<callout_softclock+512>
0xc0431365 <callout_softclock+149>: cmp $0x10000,%eax
0xc043136a <callout_softclock+154>: jg 0xc04314b0
<callout_softclock+480>
0xc0431370 <callout_softclock+160>: cmp $0x100,%eax
0xc0431375 <callout_softclock+165>: jg 0xc04315b0
<callout_softclock+736>
0xc043137b <callout_softclock+171>: movzbl %dl,%eax
0xc043137e <callout_softclock+174>: lea 0xc09603c0(,%eax,8),%eax
0xc0431385 <callout_softclock+181>: lea 0x0(%esi),%esi
0xc0431389 <callout_softclock+185>: lea 0x0(%edi),%edi
0xc0431390 <callout_softclock+192>: mov 0x4(%eax),%eax
0xc0431393 <callout_softclock+195>: mov %eax,0x4(%esi)
0xc0431396 <callout_softclock+198>: mov %edx,%eax
0xc0431398 <callout_softclock+200>: mov 0xc098ac20,%edi
0xc043139e <callout_softclock+206>: sub %edi,%eax
0xc04313a0 <callout_softclock+208>: cmp $0x10000,%eax
0xc04313a5 <callout_softclock+213>: jg 0xc0431490
<callout_softclock+448>
0xc04313ab <callout_softclock+219>: cmp $0x100,%eax
0xc04313b0 <callout_softclock+224>: jg 0xc0431592
<callout_softclock+706>
0xc04313b6 <callout_softclock+230>: movzbl %dl,%eax
0xc04313b9 <callout_softclock+233>: lea 0xc09603c0(,%eax,8),%eax
0xc04313c0 <callout_softclock+240>: mov %eax,(%esi)
0xc04313c2 <callout_softclock+242>: mov %edx,%eax
0xc04313c4 <callout_softclock+244>: mov 0xc098ac20,%ebx
0xc04313ca <callout_softclock+250>: sub %ebx,%eax
0xc04313cc <callout_softclock+252>: cmp $0x10000,%eax
0xc04313d1 <callout_softclock+257>: jg 0xc0431471
<callout_softclock+417>
0xc04313d7 <callout_softclock+263>: cmp $0x100,%eax
0xc04313dc <callout_softclock+268>: jg 0xc0431583
<callout_softclock+691>
0xc04313e2 <callout_softclock+274>: movzbl %dl,%eax
0xc04313e5 <callout_softclock+277>: lea 0xc09603c0(,%eax,8),%eax
0xc04313ec <callout_softclock+284>: lea 0x0(%esi),%esi
0xc04313f0 <callout_softclock+288>: mov 0x4(%eax),%eax
0xc04313f3 <callout_softclock+291>: mov %esi,(%eax)
0xc04313f5 <callout_softclock+293>: mov 0x18(%esi),%eax
0xc04313f8 <callout_softclock+296>: mov 0xc098ac20,%ecx
0xc04313fe <callout_softclock+302>: mov %eax,%edx
0xc0431400 <callout_softclock+304>: sub %ecx,%edx
0xc0431402 <callout_softclock+306>: cmp $0x10000,%edx
0xc0431408 <callout_softclock+312>: jg 0xc0431456
<callout_softclock+390>
0xc043140a <callout_softclock+314>: cmp $0x100,%edx
0xc0431410 <callout_softclock+320>: jg 0xc0431574
<callout_softclock+676>
0xc0431416 <callout_softclock+326>: and $0xff,%eax
0xc043141b <callout_softclock+331>: lea 0xc09603c0(,%eax,8),%eax
0xc0431422 <callout_softclock+338>: lea 0x0(%esi),%esi
0xc0431429 <callout_softclock+345>: lea 0x0(%edi),%edi
0xc0431430 <callout_softclock+352>: cmpl $0xc09623c0,0xc09623c0
0xc043143a <callout_softclock+362>: mov %esi,0x4(%eax)
0xc043143d <callout_softclock+365>: jne 0xc0431310 <callout_softclock+64>
0xc0431443 <callout_softclock+371>: movl $0xc098d594,0x8(%ebp)
0xc043144a <callout_softclock+378>: add $0x1c,%esp
0xc043144d <callout_softclock+381>: pop %ebx
0xc043144e <callout_softclock+382>: pop %esi
0xc043144f <callout_softclock+383>: pop %edi
0xc0431450 <callout_softclock+384>: pop %ebp
0xc0431451 <callout_softclock+385>: jmp 0xc04db5a0 <mutex_spin_exit>
0xc0431456 <callout_softclock+390>: cmp $0x1000000,%edx
0xc043145c <callout_softclock+396>: jg 0xc04315a1
<callout_softclock+721>
0xc0431462 <callout_softclock+402>: shr $0xd,%eax
0xc0431465 <callout_softclock+405>: and $0x7f8,%eax
0xc043146a <callout_softclock+410>: add $0xc09613c0,%eax
0xc043146f <callout_softclock+415>: jmp 0xc0431430
<callout_softclock+352>
0xc0431471 <callout_softclock+417>: cmp $0x1000000,%eax
0xc0431476 <callout_softclock+422>: jg 0xc04315c0
<callout_softclock+752>
0xc043147c <callout_softclock+428>: shr $0xd,%edx
0xc043147f <callout_softclock+431>: and $0x7f8,%edx
0xc0431485 <callout_softclock+437>: lea 0xc09613c0(%edx),%eax
0xc043148b <callout_softclock+443>: jmp 0xc04313f0
<callout_softclock+288>
0xc0431490 <callout_softclock+448>: cmp $0x1000000,%eax
0xc0431495 <callout_softclock+453>: jg 0xc04315d0
<callout_softclock+768>
0xc043149b <callout_softclock+459>: mov %edx,%eax
0xc043149d <callout_softclock+461>: shr $0xd,%eax
0xc04314a0 <callout_softclock+464>: and $0x7f8,%eax
0xc04314a5 <callout_softclock+469>: add $0xc09613c0,%eax
0xc04314aa <callout_softclock+474>: jmp 0xc04313c0
<callout_softclock+240>
0xc04314af <callout_softclock+479>: nop
0xc04314b0 <callout_softclock+480>: cmp $0x1000000,%eax
0xc04314b5 <callout_softclock+485>: jg 0xc04315e1
<callout_softclock+785>
0xc04314bb <callout_softclock+491>: mov %edx,%eax
0xc04314bd <callout_softclock+493>: shr $0xd,%eax
0xc04314c0 <callout_softclock+496>: and $0x7f8,%eax
0xc04314c5 <callout_softclock+501>: add $0xc09613c0,%eax
0xc04314ca <callout_softclock+506>: jmp 0xc0431390
<callout_softclock+192>
0xc04314cf <callout_softclock+511>: nop
0xc04314d0 <callout_softclock+512>: je 0xc04314e0
<callout_softclock+528>
0xc04314d2 <callout_softclock+514>: addl $0x1,0xc09623e0
0xc04314d9 <callout_softclock+521>: adcl $0x0,0xc09623e4
0xc04314e0 <callout_softclock+528>: mov 0x1c(%esi),%ebx
0xc04314e3 <callout_softclock+531>: mov 0x8(%esi),%eax
0xc04314e6 <callout_softclock+534>: xor $0x6,%ebx
0xc04314e9 <callout_softclock+537>: mov %ebx,0x1c(%esi)
0xc04314ec <callout_softclock+540>: mov 0xffffffe8(%ebp),%edx
0xc04314ef <callout_softclock+543>: mov %eax,0xffffffec(%ebp)
0xc04314f2 <callout_softclock+546>: mov 0xc(%esi),%edi
0xc04314f5 <callout_softclock+549>: mov %edx,0x10(%esi)
0xc04314f8 <callout_softclock+552>: mov 0xfffffff0(%ebp),%eax
0xc04314fb <callout_softclock+555>: mov %eax,0x14(%esi)
0xc04314fe <callout_softclock+558>: movl $0xc098d594,(%esp)
0xc0431505 <callout_softclock+565>: call 0xc04db5a0 <mutex_spin_exit>
0xc043150a <callout_softclock+570>: test $0x1,%bh
0xc043150d <callout_softclock+573>: jne 0xc0431517
<callout_softclock+583>
0xc043150f <callout_softclock+575>: mov 0xffffffe8(%ebp),%edx
0xc0431512 <callout_softclock+578>: cmp 0x30(%edx),%esi
0xc0431515 <callout_softclock+581>: je 0xc043151d
<callout_softclock+589>
0xc0431517 <callout_softclock+583>: mov %edi,(%esp)
0xc043151a <callout_softclock+586>: call *0xffffffec(%ebp)
0xc043151d <callout_softclock+589>: movl $0xc098d594,(%esp)
0xc0431524 <callout_softclock+596>: call 0xc04db580 <mutex_spin_enter>
0xc0431529 <callout_softclock+601>: mov 0xffffffe8(%ebp),%eax
0xc043152c <callout_softclock+604>: movl $0x0,0x30(%eax)
0xc0431533 <callout_softclock+611>: movl $0x0,0x2c(%eax)
0xc043153a <callout_softclock+618>: mov 0xffffffe8(%ebp),%edx
0xc043153d <callout_softclock+621>: mov 0x34(%edx),%eax
0xc0431540 <callout_softclock+624>: test %eax,%eax
0xc0431542 <callout_softclock+626>: je 0xc04312f3 <callout_softclock+35>
0xc0431548 <callout_softclock+632>: movl $0x0,0x34(%edx)
0xc043154f <callout_softclock+639>: mov %eax,0x8(%esp)
0xc0431553 <callout_softclock+643>: mov %edx,0x4(%esp)
0xc0431557 <callout_softclock+647>: movl $0xc098d59c,(%esp)
0xc043155e <callout_softclock+654>: call 0xc0426000 <sleepq_wake>
0xc0431563 <callout_softclock+659>: movl $0xc098d594,(%esp)
0xc043156a <callout_softclock+666>: call 0xc04db580 <mutex_spin_enter>
0xc043156f <callout_softclock+671>: jmp 0xc04312f3 <callout_softclock+35>
0xc0431574 <callout_softclock+676>: movzbl %ah,%eax
0xc0431577 <callout_softclock+679>: lea 0xc0960bc0(,%eax,8),%eax
0xc043157e <callout_softclock+686>: jmp 0xc0431430
<callout_softclock+352>
0xc0431583 <callout_softclock+691>: movzbl %dh,%eax
0xc0431586 <callout_softclock+694>: lea 0xc0960bc0(,%eax,8),%eax
0xc043158d <callout_softclock+701>: jmp 0xc04313f0
<callout_softclock+288>
0xc0431592 <callout_softclock+706>: movzbl %dh,%eax
0xc0431595 <callout_softclock+709>: lea 0xc0960bc0(,%eax,8),%eax
0xc043159c <callout_softclock+716>: jmp 0xc04313c0
<callout_softclock+240>
0xc04315a1 <callout_softclock+721>: shr $0x18,%eax
0xc04315a4 <callout_softclock+724>: lea 0xc0961bc0(,%eax,8),%eax
0xc04315ab <callout_softclock+731>: jmp 0xc0431430
<callout_softclock+352>
0xc04315b0 <callout_softclock+736>: movzbl %dh,%eax
0xc04315b3 <callout_softclock+739>: lea 0xc0960bc0(,%eax,8),%eax
0xc04315ba <callout_softclock+746>: jmp 0xc0431390
<callout_softclock+192>
0xc04315bf <callout_softclock+751>: nop
0xc04315c0 <callout_softclock+752>: shr $0x18,%edx
0xc04315c3 <callout_softclock+755>: lea 0xc0961bc0(,%edx,8),%eax
0xc04315ca <callout_softclock+762>: jmp 0xc04313f0
<callout_softclock+288>
0xc04315cf <callout_softclock+767>: nop
0xc04315d0 <callout_softclock+768>: mov %edx,%eax
0xc04315d2 <callout_softclock+770>: shr $0x18,%eax
0xc04315d5 <callout_softclock+773>: lea 0xc0961bc0(,%eax,8),%eax
0xc04315dc <callout_softclock+780>: jmp 0xc04313c0
<callout_softclock+240>
0xc04315e1 <callout_softclock+785>: mov %edx,%eax
0xc04315e3 <callout_softclock+787>: shr $0x18,%eax
0xc04315e6 <callout_softclock+790>: lea 0xc0961bc0(,%eax,8),%eax
0xc04315ed <callout_softclock+797>: jmp 0xc0431390
<callout_softclock+192>
0xc04315f2 <callout_softclock+802>: mov $0xc08784a1,%eax
0xc04315f7 <callout_softclock+807>: mov $0x240,%edi
0xc04315fc <callout_softclock+812>: mov $0xc0878524,%ebx
0xc0431601 <callout_softclock+817>: mov %eax,0xc(%esp)
0xc0431605 <callout_softclock+821>: mov %edi,0x8(%esp)
0xc0431609 <callout_softclock+825>: mov %ebx,0x4(%esp)
0xc043160d <callout_softclock+829>: movl $0xc083716d,(%esp)
0xc0431614 <callout_softclock+836>: call 0xc06d14e0 <__kernassert>
0xc0431619 <callout_softclock+841>: jmp 0xc0431323 <callout_softclock+83>
0xc043161e <callout_softclock+846>: mov $0x241,%eax
0xc0431623 <callout_softclock+851>: mov $0xc08784cb,%edx
0xc0431628 <callout_softclock+856>: mov %eax,0x8(%esp)
0xc043162c <callout_softclock+860>: mov $0xc0878524,%eax
0xc0431631 <callout_softclock+865>: mov %edx,0xc(%esp)
0xc0431635 <callout_softclock+869>: mov %eax,0x4(%esp)
0xc0431639 <callout_softclock+873>: movl $0xc083716d,(%esp)
0xc0431640 <callout_softclock+880>: call 0xc06d14e0 <__kernassert>
0xc0431645 <callout_softclock+885>: jmp 0xc043132e <callout_softclock+94>
0xc043164a <callout_softclock+890>: mov $0xc08785fc,%eax
0xc043164f <callout_softclock+895>: mov %eax,0xc(%esp)
0xc0431653 <callout_softclock+899>: mov $0x242,%eax
0xc0431658 <callout_softclock+904>: mov %eax,0x8(%esp)
0xc043165c <callout_softclock+908>: mov $0xc0878524,%eax
0xc0431661 <callout_softclock+913>: mov %eax,0x4(%esp)
0xc0431665 <callout_softclock+917>: movl $0xc083716d,(%esp)
0xc043166c <callout_softclock+924>: call 0xc06d14e0 <__kernassert>
0xc0431671 <callout_softclock+929>: jmp 0xc0431338
<callout_softclock+104>
0xc0431676 <callout_softclock+934>: mov $0xc0878620,%eax
0xc043167b <callout_softclock+939>: mov $0x243,%edi
0xc0431680 <callout_softclock+944>: mov $0xc0878524,%ebx
0xc0431685 <callout_softclock+949>: mov %eax,0xc(%esp)
0xc0431689 <callout_softclock+953>: mov %edi,0x8(%esp)
0xc043168d <callout_softclock+957>: mov %ebx,0x4(%esp)
0xc0431691 <callout_softclock+961>: movl $0xc083716d,(%esp)
0xc0431698 <callout_softclock+968>: call 0xc06d14e0 <__kernassert>
0xc043169d <callout_softclock+973>: jmp 0xc0431342
<callout_softclock+114>
End of assembler dump.
-- Kazushsi
Speak softly and carry a +6 two-handed sword.
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