[c-nsp] Cisco 7206VXR - IOS 12.4(12) - Bus Error Crash

[e ninja]

Good analysis. Looks like we tried to read from a valid address.

main:text,(r/o), main:data (r/w) and main:bss (r/w) are subregions of the
local memory used for IOS. main:heap is what is left after IOS image is
loaded.

main:bss contains uninitialized variables.

/eninja



On Wed, Mar 12, 2008 at 2:04 AM, Werner Detter <werner at trans.net> wrote:

> Hi again,
>
> > crashed due to a bus error (bus error at PC 0x6013C4D8, address
> 0x64588700).
>
> As described in the Cisco document "Troubleshooting Bus Error Crashes" [1]
> I've tried
> to figure out to which memory location the address 0x64588700 corresponds
> to.
> 'show region' shows, that the address 0x64588700 is within the following
> range:
>
> Region Manager:
> Start End Size(b) Class Media Name
> 0x644B95A0 0x64A8357F 6070240 IBss R/W main:bss
>
> As i understand this output, it means that the router was accessing a
> valid address,
> but the hardware corresponding to that address is not responding properly
> and there
> may be a hardware problem.
>
> "Main" corresponds to main memory or dynamic RAM (DRAM) but what exaclty
> stands
> "main:bss" for? What do you suggest?
>
> Any help or comments appreciated,
> Werner
>
>
> [1]
> http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_tech_note09186a00800cdd51.shtml
>
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