* ELF executable relinking
@ 2005-04-13 15:50 Francesco Casadei
2005-04-13 16:04 ` Daniel Jacobowitz
0 siblings, 1 reply; 3+ messages in thread
From: Francesco Casadei @ 2005-04-13 15:50 UTC (permalink / raw)
To: binutils
Hi all,
I have a simple question I couldn't answer searching the archives or
googling the
web or groups, so here I am.
Basically, I want to add new unrelated code to an existing ELF executable
ET_EXEC), by relinking it with a relocatable object (ET_REL).
Is it possible to input an executable and one or more relocatable
object to the link
editor and generate a new executable with code and data from all objects?
I tried it but it didn't work, I get 'multiple definition errors'
(related to symbols which
marks the .dynamic and .got sections). I also tried preserving the relocation
information within the executable, stripping the duplicate symbols,
link with/without
libc (already linked to the old executable). Nothing seems to work.
The best result I got is a "successfull" relink and segmentation fault.
Please CC me as I'm not subscribed to the list. Thank you.
Regards,
Francesco Casadei
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ELF executable relinking
2005-04-13 15:50 ELF executable relinking Francesco Casadei
@ 2005-04-13 16:04 ` Daniel Jacobowitz
2005-04-13 16:23 ` Dave Korn
0 siblings, 1 reply; 3+ messages in thread
From: Daniel Jacobowitz @ 2005-04-13 16:04 UTC (permalink / raw)
To: Francesco Casadei; +Cc: binutils
On Wed, Apr 13, 2005 at 11:50:33AM -0400, Francesco Casadei wrote:
> Basically, I want to add new unrelated code to an existing ELF executable
> ET_EXEC), by relinking it with a relocatable object (ET_REL).
> Is it possible to input an executable and one or more relocatable
> object to the link
> editor and generate a new executable with code and data from all objects?
Generally no.
--
Daniel Jacobowitz
CodeSourcery, LLC
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: ELF executable relinking
2005-04-13 16:04 ` Daniel Jacobowitz
@ 2005-04-13 16:23 ` Dave Korn
0 siblings, 0 replies; 3+ messages in thread
From: Dave Korn @ 2005-04-13 16:23 UTC (permalink / raw)
To: 'Daniel Jacobowitz', 'Francesco Casadei'; +Cc: binutils
----Original Message----
>From: Daniel Jacobowitz
>Sent: 13 April 2005 17:03
> On Wed, Apr 13, 2005 at 11:50:33AM -0400, Francesco Casadei wrote:
>> Basically, I want to add new unrelated code to an existing ELF executable
>> ET_EXEC), by relinking it with a relocatable object (ET_REL).
>> Is it possible to input an executable and one or more relocatable
>> object to the link
>> editor and generate a new executable with code and data from all objects?
>
> Generally no.
That's why the non-relocatable link is also called a "final" link: it
tends to be fairly final! (It discards information that would be needed to
link further object files in).
cheers,
DaveK
--
Can't think of a witty .sigline today....
^ permalink raw reply [flat|nested] 3+ messages in thread
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2005-04-13 16:04 ` Daniel Jacobowitz
2005-04-13 16:23 ` Dave Korn
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