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Re: [Xen-devel] double fault ...
| To: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] double fault ... |
| From: | Gerd Knorr <kraxel@xxxxxxxxxxx> |
| Date: | Mon, 2 May 2005 17:53:33 +0200 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Mon, 02 May 2005 15:54:44 +0000 |
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On Mon, May 02, 2005 at 04:23:42PM +0100, Keir Fraser wrote:
>
> On 2 May 2005, at 15:51, Gerd Knorr wrote:
>
> >... happens with panics when compiled with debugging.
> >panic() calls debugger_trap_immediate(), which triggers
> >do_int3, which calls panic(), which recurses until the
> >stack is full => bang!
>
> You compile with crash_debug=y?
Yes. Mostly to get a xen binary without optimization and with full
debug info, so I can easily lookup stuff using
"objdump -dS xen-syms | less +/<addr>".
> The intention is that do_int3() will execute DEBUGGER_trap_fatal()
> before panic(), so you should enter the gdb stub rather than
> infinitely loop. How is that not occurring?
I don't actually have a debugger attached, so DEBUGGER_trap_fatal
aka __trap_to_cdb() instantly returns.
Gerd
--
#define printk(args...) fprintf(stderr, ## args)
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