On Tuesday 09 of August 2011 14:56:57 Herbert Poetzl wrote:
> On Tue, Aug 09, 2011 at 01:35:13PM +0200, Pawel Sikora wrote:
> > fresh logs from another lock:
> > http://pluto.agmk.net/kernel/opteron.lock-01.txt
>
> could you do the address check for the Code: lines
> for that one too and mark the <xx> for me?
first pattern with mark <5b> is located in vmlinux file at 0x6341a3.
text section starts in file at 0x200000 with logical adress ffffffff81000000,
so if i caclulate correctly the code is:
ffffffff81434174: 66 66 66 2e 0f 1f 84 data32 data32 nopw %cs:0x0(%rax,%rax,1)
ffffffff8143417b: 00 00 00 00 00
ffffffff81434180 <down_read>:
ffffffff81434180: 55 push %rbp
ffffffff81434181: 48 89 e5 mov %rsp,%rbp
ffffffff81434184: 53 push %rbx
ffffffff81434185: 48 89 fb mov %rdi,%rbx
ffffffff81434188: 48 83 ec 08 sub $0x8,%rsp
ffffffff8143418c: e8 3f ed ff ff callq ffffffff81432ed0 <_cond_resched>
ffffffff81434191: 48 89 d8 mov %rbx,%rax
ffffffff81434194: f0 48 ff 00 lock incq (%rax)
ffffffff81434198: 79 05 jns ffffffff8143419f <down_read+0x1f>
ffffffff8143419a: e8 c1 bc e0 ff callq ffffffff8123fe60 <call_rwsem_down_read_failed>
ffffffff8143419f: 48 83 c4 08 add $0x8,%rsp
ffffffff814341a3: 5b pop %rbx <===== HERE
ffffffff814341a4: c9 leaveq
ffffffff814341a5: c3 retq
second pattern with mark <4c> is located at 0x43482a:
ffffffff81234790 <find_next_bit>:
(...)
ffffffff812347fc: 48 f7 c7 c0 ff ff ff test $0xffffffffffffffc0,%rdi
ffffffff81234803: 75 e3 jne ffffffff812347e8 <find_next_bit+0x58>
ffffffff81234805: 48 85 ff test %rdi,%rdi
ffffffff81234808: 4c 89 c8 mov %r9,%rax
ffffffff8123480b: 74 20 je ffffffff8123482d <find_next_bit+0x9d>
ffffffff8123480d: 49 8b 00 mov (%r8),%rax
ffffffff81234810: b9 40 00 00 00 mov $0x40,%ecx
ffffffff81234815: 48 c7 c2 ff ff ff ff mov $0xffffffffffffffff,%rdx
ffffffff8123481c: 29 f9 sub %edi,%ecx
ffffffff8123481e: 48 d3 ea shr %cl,%rdx
ffffffff81234821: 48 21 d0 and %rdx,%rax
ffffffff81234824: 74 0a je ffffffff81234830 <find_next_bit+0xa0>
ffffffff81234826: 48 0f bc c0 bsf %rax,%rax
ffffffff8123482a: 4c 01 c8 add %r9,%rax <====== HERE
ffffffff8123482d: c9 leaveq
ffffffff8123482e: c3 retq
code:
fb 4c 89 65 e0 4c 89 7d f8 49 89 d5 85 f6 74 2a 41 0f b6 10 45 89 cc 89 f0 4d 89 c7 44 38 ca 74 0f eb 2d 0f 1f 40 00 49 83 c7 01
is located at 0x331db1:
ffffffff81131d90 <check_bytes_and_report>:
ffffffff81131d90: 55 push %rbp
ffffffff81131d91: b8 01 00 00 00 mov $0x1,%eax
ffffffff81131d96: 48 89 e5 mov %rsp,%rbp
ffffffff81131d99: 48 83 ec 50 sub $0x50,%rsp
ffffffff81131d9d: 4c 89 75 f0 mov %r14,-0x10(%rbp)
ffffffff81131da1: 49 89 f6 mov %rsi,%r14
ffffffff81131da4: 8b 75 10 mov 0x10(%rbp),%esi
ffffffff81131da7: 48 89 5d d8 mov %rbx,-0x28(%rbp)
ffffffff81131dab: 4c 89 6d e8 mov %r13,-0x18(%rbp)
ffffffff81131daf: 48 89 fb mov %rdi,%rbx <==== FROM HERE 0xfb
ffffffff81131db2: 4c 89 65 e0 mov %r12,-0x20(%rbp)
ffffffff81131db6: 4c 89 7d f8 mov %r15,-0x8(%rbp)
ffffffff81131dba: 49 89 d5 mov %rdx,%r13
ffffffff81131dbd: 85 f6 test %esi,%esi
ffffffff81131dbf: 74 2a je ffffffff81131deb <check_bytes_and_report+0x5b>
ffffffff81131dc1: 41 0f b6 10 movzbl (%r8),%edx
ffffffff81131dc5: 45 89 cc mov %r9d,%r12d
ffffffff81131dc8: 89 f0 mov %esi,%eax
ffffffff81131dca: 4d 89 c7 mov %r8,%r15
ffffffff81131dcd: 44 38 ca cmp %r9b,%dl
ffffffff81131dd0: 74 0f je ffffffff81131de1 <check_bytes_and_report+0x51>
ffffffff81131dd2: eb 2d jmp ffffffff81131e01 <check_bytes_and_report+0x71>
ffffffff81131dd4: 0f 1f 40 00 nopl 0x0(%rax)
ffffffff81131dd8: 49 83 c7 01 add $0x1,%r15
but i can't find in vmlinux this pattern:
00 00 66 66 66 66 90 65 48 8b 04 25 c8 b5 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 80 38 e0 ff ff a8 08 0f 85 17 01 00 00 fb f4
maybe it comes from some loaded module?
Received on Tue Aug 9 16:59:32 2011