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Re: [PATCH] testsuite/gdb.dwarf2: Fix for dw2-ifort-parameter failure on ARM
- From: Omair Javaid <omair dot javaid at linaro dot org>
- To: Pedro Alves <palves at redhat dot com>
- Cc: Yao Qi <yao at codesourcery dot com>, gdb-patches at sourceware dot org
- Date: Thu, 16 Jan 2014 19:16:55 +0500
- Subject: Re: [PATCH] testsuite/gdb.dwarf2: Fix for dw2-ifort-parameter failure on ARM
- Authentication-results: sourceware.org; auth=none
- References: <CANW4E-2bQYjx6YdR3qGyKUsQa_KOrtmkWsZYqKzcuQBF==RPpw at mail dot gmail dot com> <CANW4E-25HdXYKMk258iO=GZ=PNM=Zu4jMbstpkSoMgE9wFpmkQ at mail dot gmail dot com> <51E4B587 dot 70007 at codesourcery dot com> <CANW4E-0vd51dTvd5qxUbeDn7ebXV-cf+WS4+VpyyGyD0MYGk8Q at mail dot gmail dot com> <5280A528 dot 8040308 at codesourcery dot com> <52D7A05F dot 6070304 at linaro dot org> <52D7AAF1 dot 80501 at redhat dot com> <52D7B3C5 dot 1000702 at linaro dot org> <52D7D222 dot 9020403 at redhat dot com> <52D7E4C5 dot 4040504 at linaro dot org> <52D7E605 dot 4020601 at redhat dot com>
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)
^