# Crash dump and syslog

**URL:** <https://forum.legato.io/t/crash-dump-and-syslog/5200>\
**Category:** Uncategorized\
**Created:** [May 18, 2020, 1:18pm UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200 "2020-05-18T13:18:12Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![zuuuuk](https://avatars.discourse-cdn.com/v4/letter/z/e5b9ba/32.png) [@zuuuuk](https://forum.legato.io/u/zuuuuk)\
**Post date:** [May 18, 2020, 1:18pm UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200/1 "2020-05-18T13:18:12Z")

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Hello  
My program crasht and i get core dump file and syslog file.

**SIGNAL: 11, ADDR (nil), AT 0xb6c2b908 SI\_CODE 0x00000001**  
**ILLEGAL ADDRESS (nil)**  
**LEGATO VERSION**  
**20.04.0\_2ea965e52e94cd5936a25400966763a5\_modified**

what is ?  
what does it mean?  
**AT 0xb6c2b908**

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [May 19, 2020, 12:27am UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200/2 "2020-05-19T00:27:08Z")

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Please attach your code that can reproduce the issue.

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<div class="post-metadata">

**Author:** ![zuuuuk](https://avatars.discourse-cdn.com/v4/letter/z/e5b9ba/32.png) [@zuuuuk](https://forum.legato.io/u/zuuuuk)\
**Post date:** [May 20, 2020, 9:07pm UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200/3 "2020-05-20T21:07:46Z")

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why do you need my code? if I am interested in the abbreviation AT?  
my code is about 3000 lines. what exactly do you want to see there?  
How can you match syslog and code?

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [May 20, 2020, 11:12pm UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200/4 "2020-05-20T23:12:13Z")

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Can you simplify the code?  
I want to see if i can reproduce

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<div class="post-metadata">

**Author:** ![zuuuuk](https://avatars.discourse-cdn.com/v4/letter/z/e5b9ba/32.png) [@zuuuuk](https://forum.legato.io/u/zuuuuk)\
**Post date:** [May 28, 2020, 5:55pm UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200/5 "2020-05-28T17:55:41Z")

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not you can not pose this problem.  
this is related to the implementation of the modem.  
I see that a log of information is stored in the log  
registers, stack, id thread. But how to apply this information? Basically, it does not come of any benefit.

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [June 5, 2020, 11:31am UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200/6 "2020-06-05T11:31:17Z")

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Did you try gdb with the core dump

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<div class="post-metadata">

**Author:** ![nathan.raj](https://avatars.discourse-cdn.com/v4/letter/n/cdc98d/32.png) [@nathan.raj](https://forum.legato.io/u/nathan.raj)\
**Post date:** [May 16, 2025, 8:52am UTC](https://forum.legato.io/t/crash-dump-and-syslog/5200/7 "2025-05-16T08:52:55Z")

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> [@zuuuuk](#):
>
> SIGNAL: 11, ADDR (nil), AT 0xb6c2b908 SI\_CODE 0x00000001

It’s been a while but to answer the question, it saying the program counter 0xb68d4254.

The whole message is segmentation fault at address 0x0 at program counter 0xb6c2b908 due to invalid memory access.