Messages in this thread | | | From | Nick Warne <> | Subject | kswapd0 oops -> debug information | Date | Sat, 27 Nov 2004 13:11:25 +0000 |
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Hi all,
I keep getting this oops so randomly, that 'RIGHT, YOU BUGGER' I have attempted to supply proper debug info - where I have got is what I learnt today, so I am a bit stuck after finding the area of code.
ksymoops provides:
>>EIP; c0151239 <__iget+29/4c> <===== Code; c015120e <init_once+1a/1c> 00000000 <_EIP>: Code; c015120e <init_once+1a/1c> 0: 76 00 jbe 2 <_EIP+0x2> c0151210 <__iget+0/4c> Code; c0151210 <__iget+0/4c> 2: 53 push %ebx Code; c0151211 <__iget+1/4c> 3: 8b 5c 24 08 mov 0x8(%esp,1),%ebx Code; c0151215 <__iget+5/4c> 7: 8b 43 1c mov 0x1c(%ebx),%eax Code; c0151218 <__iget+8/4c> a: 85 c0 test %eax,%eax Code; c015121a <__iget+a/4c> c: 74 05 je 13 <_EIP+0x13> c0151221 <__iget+11/4c> Code; c015121c <__iget+c/4c> e: ff 43 1c incl 0x1c(%ebx) Code; c015121f <__iget+f/4c> 11: eb 38 jmp 4b <_EIP+0x4b> c0151259 <__iget+49/4c> Code; c0151221 <__iget+11/4c>
13: ff 43 1c incl 0x1c(%ebx) Code; c0151224 <__iget+14/4c> 16: f6 83 1c 01 00 00 0f testb $0xf,0x11c(%ebx) Code; c015122b <__iget+1b/4c> 1d: 75 26 jne 45 <_EIP+0x45> c0151253 <__iget+43/4c> Code; c015122d <__iget+1d/4c> 1f: 8d 53 08 lea 0x8(%ebx),%edx Code; c0151230 <__iget+20/4c> 22: 8b 4a 04 mov 0x4(%edx),%ecx Code; c0151233 <__iget+23/4c> 25: 8b 43 08 mov 0x8(%ebx),%eax Code; c0151236 <__iget+26/4c> 28: 89 48 04 mov %ecx,0x4(%eax) Code; c0151239 <__iget+29/4c> <===== 2b: 89 01 mov %eax,(%ecx) <===== Code; c015123b <__iget+2b/4c> 2d: a1 6c 9c 30 c0 mov 0xc0309c6c,%eax Code; c0151240 <__iget+30/4c> 32: 89 50 04 mov %edx,0x4(%eax) Code; c0151243 <__iget+33/4c> 35: 89 43 08 mov %eax,0x8(%ebx) Code; c0151246 <__iget+36/4c> 38: c7 42 04 6c 9c 30 c0 movl $0xc0309c6c,0x4(%edx) Code; c015124d <__iget+3d/4c> 3f: 89 .byte 0x89
I have traced this code to fs/inode.c. Producing assembler of inode.c gives this (snipped):
__iget: pushl %ebx movl 8(%esp),%ebx movl 28(%ebx),%eax testl %eax,%eax je .L3337 #APP incl 28(%ebx) #NO_APP jmp .L3336 .p2align 4,,7 .L3337: #APP incl 28(%ebx) #NO_APP testb $15,284(%ebx) jne .L3340 leal 8(%ebx),%edx movl 4(%edx),%ecx movl 8(%ebx),%eax movl %ecx,4(%eax) movl %eax,(%ecx) <===== >>EIP; c0151239 <__iget+29/4c> movl inode_in_use,%eax movl %edx,4(%eax) movl %eax,8(%ebx) movl $inode_in_use,4(%edx) movl %edx,inode_in_use .L3340:
Which quiet nicely matches the ksymoops output. My books tell me the inode.s file _should_ give me line numbers in inode.c so I can then locate area of code - but I can't see how to match the produced assembler to the C source.
Hope this helps someone - and if you know who to get assembler code to match C code via line numbers, I would like to know please.
TIA,
Nick -- "When you're chewing on life's gristle, Don't grumble, Give a whistle..." - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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