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Re: PCH support on Solaris
- From: Eric Botcazou <ebotcazou at libertysurf dot fr>
- To: Ulrich Weigand <weigand at immd1 dot informatik dot uni-erlangen dot de>
- Cc: weigand at immd1 dot informatik dot uni-erlangen dot de (Ulrich Weigand),bonzini at gnu dot org,geoffk at geoffk dot org,gcc-patches at gcc dot gnu dot org
- Date: Sat, 5 Apr 2003 21:58:28 +0200
- Subject: Re: PCH support on Solaris
- References: <200304051730.TAA12371@faui11.informatik.uni-erlangen.de>
> I guess I am confused then about what you are trying to do. I thought
> the base address you need to map at was an external requirement imposed
> by the PCH file that you cannot influence. This is what I was trying
> to solve ...
Well, sort of an external requirement, since we set it when saving the PCH
file and we have full control over it.
> Your test program still leaves it up to the OS to determine some
> arbitrary address for the mapping, which is not under your control.
> So you're saying that as long as you get that same address twice
> under the same circumstances that's fine with you, no matter what
> the address is?
Yes, that's how the PCH heuristics works, see:
http://gcc.gnu.org/ml/gcc-patches/2003-04/msg00191.html
--
Eric Botcazou