Re: Question: how to submit support code for a new processor?

[Jeff Kenton <jkenton at tilera dot com>]

On 08/16/2012 05:23 PM, Mark Wielaard wrote:
> On Thu, 2012-08-16 at 17:09 +0200, Mark Wielaard wrote:
>> On Thu, 2012-08-16 at 10:57 -0400, Jeff Kenton wrote:
>>> 3. elflint.c, at line 954, generates an error:
>>>
>>>       section [36] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x20c28
>>> does not match .got.plt section address 0x20cb8
>>>
>>> for many of the *.so files it checks.  This is because the *.so
>>> intentionally points to ".got" rather than ".got.plt".  Our gcc guy
>>> doesn't believe this is an error.
>> I would have to look that up.
> This sounds a bit like an old binutils gold linker issue:
> http://sourceware.org/bugzilla/show_bug.cgi?id=10450#c1
>
> What compiler and linker versions are you using?
>
> Could you send a small .so binary testcase compiled from some trivial
> source (please quote the source and build commands), then we can inspect
> the binary directly (and when your port is in then we could cross check
> on other arches).
>
> Thanks,
>
> Mark

Now that the Tilera port is in I thought I'd re-open this question:

  - We are using our own port of gcc 4.4.6 for the Tilera processor 
(it's a custom processor, so doesn't match anything else).
  - We are using binutils ld 2.21, not the Gold Linker.
  - We have deliberately created the entry that elflint is complaining 
about, pointing to ".got" rather than ".got.plt".  Our gcc guy has 
reasons for this (I can get the details) and he claims it's legal.  I 
don't have a trivial .so binary for you -- the smallest I'm building is 
about 60K.

--jeff