Re: [PATCH v2] gdbserver: uclinux: pull in ptrace offset definitions from asm/ptrace.h

[Pedro Alves <palves@redhat.com>]

On 04/26/2012 05:09 PM, Will Deacon wrote:

> On Thu, Apr 26, 2012 at 05:02:18PM +0100, Pedro Alves wrote:
>> On 04/26/2012 04:54 PM, Will Deacon wrote:
>>>
>>> diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
>>> index 35d7e69..93d1f36 100644
>>> --- a/gdb/gdbserver/linux-low.c
>>> +++ b/gdb/gdbserver/linux-low.c
>>> @@ -4772,6 +4772,8 @@ linux_stopped_data_address (void)
>>>  #define PT_TEXT_ADDR     (0x10000*4)
>>>  #define PT_DATA_ADDR     (0x10004*4)
>>>  #define PT_TEXT_END_ADDR (0x10008*4)
>>> +#else
>>> +#include <asm/ptrace.h>
>>>  #endif
>>
>>
>> I'd much rather we include asm/ptrace.h unconditionally at the top, and wrap the
>> existing #defines in (a single) #ifndef PT_TEXT_ADDR.  That'll allow easily trimming
>> that section in a few years time, if/when we bump the minimum kernel version
>> required past a version that is known to define those for those archs.  If that breaks
>> one of those archs, we'll hear about it soon enough, don't sweat about it.  :-)
> 
> Right-o. I did actually try that initially but it gets fairly ugly if you
> want to deal with the case where only a subset of the #defines exist in the
> header. If breaking these archs isn't a big concern up-front, then I'm happy
> just to test PT_TEXT_ADDR for each of them and be done with it. Plus, that
> should take care of the sane configurations.


Yes, let's try that first please.  Looking at Linux's git, I see that
sh's definition of those symbols came in be6514c6 (all three of them), arm in
68b7f715 (ditto), bfin in 1394f032 (ditto), microblaze in c47f10ba (ditto).  I can't
find any reference to those symbols under arch/m68k or arch/c6x (maybe those are
still out of tree?  though that surprises me, so it may be I should be looking
for something else), but still, I don't think we need to worry about
only a subset being defined.

-- 
Pedro Alves