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List: uclinux-dev
Subject: [uClinux-dev] how to fix "invalid kernel stack pointer"
From: Abhishek Thakur <Abhishek.Thakur () Synchronous ! net>
Date: 2001-12-29 3:00:40
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Hi,
We are using NETSilicon based uClinux software and have been facing some
extremely infrequent crashes, which start with something like that quoted
below.
Where should we look out to find a possible cause in the problem.
Is this a kernel-stack issue, process-stack too low, memory corruption
..?? Anybody encountered such bug? any suggestions/likely approach to debug
further would be welcome.
Thanks
Abhishek
-------
Internal error: Vector exception: 12c00000
CPU: 0
pc : [<0000815c>]
lr : [<0000b378>]
sp : 000080e0 ip : 0000809c fp : 000080e0
r10: 000080e0 r9 : 000080e0 r8 : 000080e0
r7 : 00000000 r6 : 000000be r5 : 00000000 r4 : 00000000
r3 : 60000013 r2 : fffffc18 r1 : 6f6f6220 r0 : 00000000
Flags: nzCv IRQs on FIQs on Mode SVC_32
Process snmpd (pid: 26, stackpage=01fe7000)
Stack: 000080e0 invalid kernel stack pointer
Backtrace: invalid frame pointer
Code: 0a000010 e1a00005 e591312c e3530000 15913130
------
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<TITLE> how to fix "invalid kernel stack pointer"</TITLE>
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<P><FONT SIZE=2>Hi,</FONT>
<BR><FONT SIZE=2> We are using NETSilicon based uClinux software and have \
been facing some extremely infrequent crashes, which start with something like that \
quoted below.</FONT></P>
<P><FONT SIZE=2> Where should we look out to find a possible cause in the \
problem.</FONT> <BR><FONT SIZE=2> Is this a kernel-stack issue, \
process-stack too low, memory corruption ..?? Anybody encountered such bug? any \
suggestions/likely approach to debug further would be welcome.</FONT></P>
<P><FONT SIZE=2>Thanks</FONT>
<BR><FONT SIZE=2>Abhishek</FONT>
</P>
<P><FONT SIZE=2>-------</FONT>
<BR><FONT SIZE=2>Internal error: Vector exception: 12c00000</FONT>
<BR><FONT SIZE=2>CPU: 0</FONT>
<BR><FONT SIZE=2>pc : [<0000815c>]</FONT>
<BR><FONT SIZE=2>lr : [<0000b378>]</FONT>
<BR><FONT SIZE=2>sp : 000080e0 ip : 0000809c fp : 000080e0</FONT>
<BR><FONT SIZE=2>r10: 000080e0 r9 : 000080e0 r8 : 000080e0</FONT>
<BR><FONT SIZE=2>r7 : 00000000 r6 : 000000be r5 : 00000000 r4 : \
00000000</FONT> <BR><FONT SIZE=2>r3 : 60000013 r2 : fffffc18 r1 : \
6f6f6220 r0 : 00000000</FONT> <BR><FONT SIZE=2>Flags: nzCv IRQs on \
FIQs on Mode SVC_32</FONT> <BR><FONT SIZE=2>Process snmpd (pid: 26, \
stackpage=01fe7000)</FONT> <BR><FONT SIZE=2>Stack: 000080e0 invalid kernel stack \
pointer</FONT> <BR><FONT SIZE=2>Backtrace: invalid frame pointer</FONT>
<BR><FONT SIZE=2>Code: 0a000010 e1a00005 e591312c e3530000 15913130</FONT>
<BR><FONT SIZE=2>------</FONT>
</P>
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