[help]Where can I find user-space registers in an x86-64 kernel dump?
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Hi guys:
Where can I find user-space registers in an x86-64 kernel dump?
thanks!
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- attachment.html (text/html — 647 bytes)
Hello,
From: "hujun_hotmail" <duanshuidao(a)hotmail.com>
Subject: [Crash-utility] [help]Where can I find user-space registers in an x86-64 kernel
dump?
Date: Sat, 3 Mar 2012 21:58:55 +0800
Hi guys:
Where can I find user-space registers in an x86-64 kernel dump?
thanks!
Kernel performs saving user-space registers at several kernel entry
points such as system calls, interrupts and exceptions. Concretely,
look carefully into ./arch/x86/kernel/head_64.S.
Also crash-gcore-command would help you, which tries to collect such
registers. It's available here:
http://people.redhat.com/anderson/extensions.html.
Thanks.
HATAYAMA, Daisuke
thanks a lot !
--------------------------------------------------
From: "HATAYAMA Daisuke" <d.hatayama(a)jp.fujitsu.com>
Sent: Monday, March 05, 2012 9:05 AM
To: <duanshuidao(a)hotmail.com>
Cc: <crash-utility(a)redhat.com>
Subject: Re: [Crash-utility] [help]Where can I find user-space registers in
an x86-64 kernel dump?
Hello,
From: "hujun_hotmail" <duanshuidao(a)hotmail.com>
Subject: [Crash-utility] [help]Where can I find user-space registers in an
x86-64 kernel dump?
Date: Sat, 3 Mar 2012 21:58:55 +0800
> Hi guys:
> Where can I find user-space registers in an x86-64 kernel dump?
>
> thanks!
Kernel performs saving user-space registers at several kernel entry
points such as system calls, interrupts and exceptions. Concretely,
look carefully into ./arch/x86/kernel/head_64.S.
Also crash-gcore-command would help you, which tries to collect such
registers. It's available here:
http://people.redhat.com/anderson/extensions.html.
Thanks.
HATAYAMA, Daisuke
----- Original Message -----
Hello,
From: "hujun_hotmail" <duanshuidao(a)hotmail.com>
Subject: [Crash-utility] [help]Where can I find user-space registers
in an x86-64 kernel dump?
Date: Sat, 3 Mar 2012 21:58:55 +0800
> Hi guys:
> Where can I find user-space registers in an x86-64 kernel dump?
>
> thanks!
Kernel performs saving user-space registers at several kernel entry
points such as system calls, interrupts and exceptions. Concretely,
look carefully into ./arch/x86/kernel/head_64.S.
With respect to the crash utility and dumpfiles, user-space register contents
are captured into a "pt_regs" data structure that is stored at the top of each
user task's kernel stack upon entry into kernel-space (whether via syscall,
interrupt, or exception), and those registers are displayed by the "bt"
command.
Dave
4649
days inactive
4651
days old
devel@lists.crash-utility.osci.io
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HATAYAMA Daisuke -
hujun_hotmail