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Re: x86-64 and large code model questions/bugs
Andi Kleen wrote:
> On Wed, Jan 28, 2009 at 09:39:39AM +0100, Paolo Bonzini wrote:
>>> He'll get much better code by putting the program into a -fPIC .so,
>>> loading it from a small stub and then unmap the stub.
>>> large model generates really very bad code because all jumps
>>> will be indirect.
>> Is it also true with -fpie?
>
> Not sure what you mean?
Right, sorry. I meant "can you also use -fpie and use a linker script
to relocate the text section", if you want to place it high but the code
is not gigantic?
> AFAIK -fpie code is the same quality as -fPIC. Both
> are much much better than large model.
Exactly.
Paolo