double fault panic while using gdb amd64 (remote debugging)
vasanth raonaik
vasanth.raonaik at gmail.com
Fri May 27 23:40:32 UTC 2011
Hello hackers,
I see a "double fault" error on the console while remote debugging a freebsd
kernel 6.1 on amd64 the moment I press continue on a break point.
I googled and found similar query but couldn't find a solution to this
issue. Is this a known issue? Has there been any fix made for this issue in
the latest freebsd?
here is the email that I found while searching.
http://forum.nginx.org/read.php?23,183241
=================
Hi,
I have looked at archives but with no output.
I am running freebsd7.2 amd64 as a virtual machine(VM) in vmware ESX
server. I have configured remote gdb to debug the kernel modules. My
problem is that whenever the breakpoint is hit and the I issue next or
step kernel panics with "double fault" error. This configuration was
working for 32-bit machine very well. I am trying to debug the tmpfs
module.
Panic message on console is:
Fatal double fault
rip = 0xffffffff80552be1
rsp = 0xffffffff006f5000
rbp = 0xffffffff006f5000
cpuid = 0; apic id = 00
panic: double fault
cpuid = 0
Uptime: 1h16m8s
Physical memory: 4555 MB
Dumping 207 MB: 192 176 160 144 128 112 96 80 64 48 32 16
Dump complete
I tried searching this problem on google also but with no help.
Any help will be appreciated.
Thanks,
Mayank
=================
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