Date: Sat, 18 Aug 2012 20:29:26 +0200 From: Monthadar Al Jaberi <monthadar@gmail.com> To: freebsd-current <freebsd-current@freebsd.org> Subject: kernel page fult for a valid pointer? Message-ID: <CA%2BsBSo%2BG7ovJk5O17YB-ZjCe%2BEQSntdx6MvBftKx9S=p4w8hvA@mail.gmail.com>
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Hi, I am wondering is there a reason for getting "Fatal trap 12: page fault while in kernel mode" "supervisor read, page not present" for an address used to be valid in kernel space? I dont really understand why I am getting this, I added a hardware watchpoint on the address, and when I got to the debuger I could read the memory content and dump for that address. But when I continue from the debugger I get the panic and now when I try to read the memory content I get *** error reading from address ce733000 ***. I am playing around with the kernel, but I dont really understand why this is happening or how I can track it down. Things worth noting, I am working on FreeBSD Current @ VirtualBox with VIMAGE enabled using jails. If there is any useful info I can collect it. br, -- Monthadar Al Jaberi
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