[syslog-ng] (syslog-ng): unaligned access:

[Balazs Scheidler]

> I fired up syslog-ng on my alpha OpenBSD 2.6 loghost and got this.  I have
> no what to make of it.  I'm running syslog-ng 1.4.3 and libol.0.2.16.  Is
> this a problem, perhaps similar to ger@tinet.ie's post earlier this month?
> 
> pid 4179 (syslog-ng): unaligned access: va=0x140017a5c pc=0x120013be4
> ra=0x120013be4 op=stq
> pid 4179 (syslog-ng): unaligned access: va=0x140017a4c pc=0x120013a38
> ra=0x120013a38 op=stq
> pid 4179 (syslog-ng): unaligned access: va=0x140017a54 pc=0x120013a40
> ra=0x120013a40 op=stq
> pid 4179 (syslog-ng): unaligned access: va=0x140017a4c pc=0x120013a48
> ra=0x120013a48 op=ldq
> pid 4179 (syslog-ng): unaligned access: va=0x140017adc pc=0x120013be4
> ra=0x120013be4 op=stq
> pid 4179 (syslog-ng): unaligned access: va=0x140017acc pc=0x120013a38
> ra=0x120013a38 op=stq
> pid 4179 (syslog-ng): unaligned access: va=0x140017ad4 pc=0x120013a40
> ra=0x120013a40 op=stq
> pid 4179 (syslog-ng): unaligned access: va=0x140017acc pc=0x120013a48
> ra=0x120013a48 op=ldq

It's the same... Somewhere in syslog-ng there's an unaligned dword access,
but without a core or something it's quite difficult to trace. Try to find
out where pc= points. For example:

gdb syslog-ng
disassemble $pc

it'll result in something like this:
Dump of assembler code for function main:
0x8049f94 <main>:       push   %ebp
0x8049f95 <main+1>:     mov    %esp,%ebp
0x8049f97 <main+3>:     sub    $0x9c,%esp
0x8049f9d <main+9>:     push   %edi
0x8049f9e <main+10>:    push   %esi
0x8049f9f <main+11>:    push   %ebx
0x8049fa0 <main+12>:    movl   $0x1,0xfffffffc(%ebp)
0x8049fa7 <main+19>:    add    $0xfffffff4,%esp
0x8049faa <main+22>:    push   $0x805d2c0
0x8049faf <main+27>:    call   0x80567ec <ol_object_alloc>
0x8049fb4 <main+32>:    add    $0x10,%esp
0x8049fb7 <main+35>:    mov    %eax,0xfffffff4(%ebp)
0x8049fba <main+38>:    lea    0xffffff74(%ebp),%eax

Of course listing Alpha instructions instead of x86. If you can locate the
function for me, I'll try to find the unaligned access.

-- 
Bazsi
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