Re: [PATCH] testsuite/gdb.dwarf2: Fix for dw2-ifort-parameter failure on ARM

[Omair Javaid <omair.javaid@linaro.org>]

On Thu 16 Jan 2014 07:00:37 PM PKT, Pedro Alves wrote:
> On 01/16/2014 01:55 PM, Omair Javaid wrote:
>>>> diff --git a/gdb/testsuite/gdb.dwarf2/dw2-ifort-parameter.c b/gdb/testsuite/gdb.dwarf2/dw2-ifort-parameter.c
>>>> index 361c44d..c866b0f 100644
>>>> --- a/gdb/testsuite/gdb.dwarf2/dw2-ifort-parameter.c
>>>> +++ b/gdb/testsuite/gdb.dwarf2/dw2-ifort-parameter.c
>>>> @@ -29,3 +29,9 @@ main (void)
>>>>    func ();
>>>>    return 0;
>>>>  }
>>>> +
>>>> +/* Addresses represented as data symbols, thus without Thumb (etc.)
>>>> +   mode bits.  The dw2-ifort-parameter-debug.S file uses this as
>>>> +   func's low_pc/high_pc.  */
>>>> +extern void *func_addr __attribute__ ((alias ("func")));
>>>> +extern void *main_addr __attribute__ ((alias ("main")));
>> Patch doesnt fix the issue and builds after making changes to alias definition like:
>
> Odd.  Are you saying the patch didn't build for you?  It did for
> me, in Thumb mode, and the debug info I saw looked right (no
> thumb bit).
>
>> extern void func_addr() __attribute__ ((alias ("func")));
>> extern void main_addr() __attribute__ ((alias ("main")));
>
> ...
>> but issues remains the same.
>
> That's expected, as the whole point was making a data symbol
> (void *), but that change makes it a function again (thus
> ends up with the thumb bit set again).
>

I am using gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9)
Patch fails to build with following error:

gdb compile failed, ./gdb.dwarf2/dw2-ifort-parameter.c:37:15: error:
'func_addr' alias in between function and variable is not supported
 extern void * func_addr __attribute__ ((alias ("func")));
               ^
./gdb.dwarf2/dw2-ifort-parameter.c:23:1: warning: 'func' aliased
declaration [enabled by default]
 func (void)
 ^
./gdb.dwarf2/dw2-ifort-parameter.c:38:15: error: 'main_addr' alias in
between function and variable is not supported
 extern void * main_addr __attribute__ ((alias ("main")));
               ^
./gdb.dwarf2/dw2-ifort-parameter.c:28:1: warning: 'main' aliased
declaration [enabled by default]
 main (void)
 ^