Global addressing

Global addressing

[Joy Mukherjee]

 Hi !
 	I need to relocate all the global variables of a program to some
 other address and then force the executable to use the relocated set
 instead of the original one . The problem is that when I looked at the
 assembly code generated, it seems that the compiler uses direct addressing
 for such globals .
 	Is there anyway I can force the compiler to use indexed addressing
 ONLY for all variables - local/global ? I am working on the Intel-Linux
 plateform . I would really appreciate any help .

 Joy.

Re: Global addressing

[Alexandre Oliva]

On Sep 10, 2001, Joy Mukherjee <jmukherj@csgrad.cs.vt.edu> wrote:

> I want to know the exact addresses where the GOT begins and ends.
> How can I do that ?

Look for `.got' in the output of `objdump -h'.

In case you want to do it at run-time, it depends on the platform.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist    *Please* write to mailing lists, not to me

Re: Global addressing

[Joy Mukherjee]

Hi! Just one more thing to ask - Is there any way I can get the beginning
and end addresses of the Global Offset Table ? The tag
_GLOBAL_OFFSET_TABLE_ points to somewhere in the middle of the .got
section so that both +ve and -ve offsets are possible , but I want to know
the exact addresses where the GOT begins and ends . How can I do that ?
Thank you so much for all your help .

Joy



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On 10 Sep 2001, Alexandre Oliva wrote:

> On Sep  6, 2001, Joy Mukherjee <jmukherj@csgrad.cs.vt.edu> wrote:
>
> > But is there any other way also to force indexed global
> > addressing ?
>
> I don't think there's any other mostly target-independent flag.  Some
> targets may offer flags to do it, but none of those I'm familiar
> with do.
>
> --
> Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
> Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
> CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
> Free Software Evangelist    *Please* write to mailing lists, not to me
>
>