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From: Max Filippov <jcmvbkbc@gmail.com>
Date: Wed, 28 Sep 2011 10:36:05 +0400
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Subject: Re: [Qemu-devel] When the tlb_fill will be called from generated
	code?
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To: =?utf-8?q?=E9=99=B3=E9=9F=8B=E4=BB=BB?= <chenwj@iis.sinica.edu.tw>
Cc: Jan Kiszka <jan.kiszka@web.de>, qemu-devel@nongnu.org

> > They are called from the places in TBs where
> > tcg_gen_qemu_{ld,st}{8,16,32,64}{u,s} were injected.
>=20
>   So you mean __stl_mmu/__ldl_mmu are called from the code cache.
> =20
> > > breakpoint on __stl_mmu/__ldl_mmu, but the backtrace can only show
> > > something like,
> > >
> > > #0 =E9=8D=AE_stl_mmu (addr=3D196608, val=3D0, mmu_idx=3D0) at /tmp/ch=
enwj/temp/qemu-0.13.0/softmmu_template.h:228
> > > #1 ?0x00000000400028e1 in ?? ()
> > > #2 ?0x00000000000000b4 in ?? ()
> > > #3 ?0xecc68ff412fa4137 in ?? ()
> > > #4 ?0x0000000000000000 in ?? ()
>=20
>   Does those ?? mean since we are in the code cache, so GDB cannot
> show their backtarce?

Yes, at least for the frame #1. Addresses in frames #2-#4 don't look right,=
 probably because #1 does not have a stack frame.

Thanks.
=2D- Max