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Date: Wed, 25 Jul 2012 20:13:40 +0200
From: John Marino <freebsdml@marino.st>
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To: Konstantin Belousov <kostikbel@gmail.com>
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Cc: freebsd-threads@freebsd.org
Subject: Re: Signal trampoline frame changed location on FreeBSD 9 AMD64?
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On 7/25/2012 20:10, Konstantin Belousov wrote:
>
>  From quite some time, the signal trampoline was moved into the separate
> 'shared' page. This was done to allow to remove the executable permissions
> from the stack mapping.
>
> BTW, I do see that at least gdb 7.4.1 stock can detect our trampoline.
> In-tree gdb indeed have issue understanding signal stack frame.
>
> The way forward is to implement vdso and add dwarf annotation to the
> trampoline code.

Thanks for the confirmation, Konstantin.
I will review the gdb 7.4.1 code now.

Regards,
John