Re: Sun/Oracle C++ compiler patch

[Chris Quenelle <chris.quenelle@oracle.com>]

On Friday February 25    4:19AM, Jakub Jelinek wrote:
> On Fri, Feb 25, 2011 at 10:54:32AM +0100, Tristan Gingold wrote:
>> On Feb 25, 2011, at 1:17 AM, Chris Quenelle wrote:
>>
>>> (ignore the last copy of this email, it had a terrible subject line)
>>>
>>> Hello,
>>>
>>> When the Sun/Oracle C++ compiler was ported to Linux, we started
>>> bundling a patched version of gnu ld to get the necessary treatment
>>> for our exception range sections.  I don't believe anyone has tried to
>>> offer this patch upstream, and it would really help us out if we could
>>> use the system linker when running on Linux.  I've included the
>>> contents of the patch at the end of this email.
>> Just a suggestion: can you add a comment just before to explain that this is for Sun/Oracle C++ compiler ?  This is not
>> obvious from the section name.
>>
>> Is the content of this section documented somewhere ?
> Also, do you really need ONLY_IF_R{O,W}, i.e. do some older Oracle C++ compiler versions
> emit the section writable and some later compilers emit it read-only (or vice versa)?
> .eh_frame with very old gcc versions used to be a writable sections that needed
> runtime relocation, then gcc changed to a new format which doesn't need any relocations
> and thus it is desirable to put the section into a read-only segment if all
> .eh_frame input sections are read-only.
>
> 	Jakub


Jakub: I believe our fix was made by just copying the way 
gcc_except_table is treated.
Our sections see to be writable in the a.out, I've emailed our C++ team 
to ask if we do
runtime relocations.  (ugh)

Tristan: I'll add a comment and repost the patch when I resolve Jakub's 
question.

Thanks!

--chris