Am Freitag, den 21.12.2018, 16:13 -0500 schrieb Hans-Peter Nilsson:
> On Tue, 18 Dec 2018, Uecker, Martin wrote:
> > Am Dienstag, den 18.12.2018, 17:29 +0100 schrieb Martin Uecker:
> > > Am Dienstag, den 18.12.2018, 17:24 +0100 schrieb Jakub Jelinek:
> > > > On Tue, Dec 18, 2018 at 09:03:41AM -0700
On Tue, 18 Dec 2018, Uecker, Martin wrote:
> Am Dienstag, den 18.12.2018, 17:29 +0100 schrieb Martin Uecker:
> > Am Dienstag, den 18.12.2018, 17:24 +0100 schrieb Jakub Jelinek:
> > > On Tue, Dec 18, 2018 at 09:03:41AM -0700, Jeff Law wrote:
> > > > Right. This is the classic example and highlights
Hi Martin,
> There is a similar mechanism for pointer-to-member-functions
> used by C++. Is this correct on aarch64?
/* By default, the C++ compiler will use the lowest bit of the pointer
to function to indicate a pointer-to-member-function points to a
virtual member function. However, if
Hi,
Jakub Jelinek wrote:
> On Wed, Dec 19, 2018 at 07:53:48PM +, Uecker, Martin wrote:
>> What do you think about making the trampoline a single call
>> instruction and have a large memory region which is the same
>> page mapped many times?
This sounds like a good idea, but given a function d
On Wed, Dec 19, 2018 at 07:53:48PM +, Uecker, Martin wrote:
> What do you think about making the trampoline a single call
> instruction and have a large memory region which is the same
> page mapped many times?
>
>
> call trampoline_handler
> call trampoline_handler
> call trampoline_handler
Am Dienstag, den 18.12.2018, 17:42 +0100 schrieb Jakub Jelinek:
> On Tue, Dec 18, 2018 at 04:33:48PM +, Uecker, Martin wrote:
> > > Yes, something like this. If the trampolines are pre-allocated, this could
> > > even avoid the need to clear the cache on archs where this is needed.
> >
> > And
Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law:
> It's also important to remember that not every target which uses
> function descriptors uses the LSB. On some targets the LSB may switch
> between modes (arm vs thumb for example). So on those targets the use
> of descriptors may imply
On Tue, Dec 18, 2018 at 04:33:48PM +, Uecker, Martin wrote:
> > Yes, something like this. If the trampolines are pre-allocated, this could
> > even avoid the need to clear the cache on archs where this is needed.
>
> And if we can make the trampolines be all the same (and it somehow derived
>
Am Dienstag, den 18.12.2018, 17:29 +0100 schrieb Martin Uecker:
> Am Dienstag, den 18.12.2018, 17:24 +0100 schrieb Jakub Jelinek:
> > On Tue, Dec 18, 2018 at 09:03:41AM -0700, Jeff Law wrote:
> > > Right. This is the classic example and highlights the ABI concerns. If
> > > we use the low bit to
Am Dienstag, den 18.12.2018, 17:24 +0100 schrieb Jakub Jelinek:
> On Tue, Dec 18, 2018 at 09:03:41AM -0700, Jeff Law wrote:
> > Right. This is the classic example and highlights the ABI concerns. If
> > we use the low bit to distinguish between a normal function pointer and
> > a pointer to a des
Am Dienstag, den 18.12.2018, 09:03 -0700 schrieb Jeff Law:
> On 12/18/18 8:32 AM, Jakub Jelinek wrote:
> > On Tue, Dec 18, 2018 at 10:23:46AM -0500, Paul Koning wrote:
> > >
> > >
> > > > On Dec 17, 2018, at 2:23 PM, Szabolcs Nagy
> > > > wrote:
> > > >
> > > > On 17/12/2018 18:22, Uecker, Mar
On Tue, Dec 18, 2018 at 09:03:41AM -0700, Jeff Law wrote:
> Right. This is the classic example and highlights the ABI concerns. If
> we use the low bit to distinguish between a normal function pointer and
> a pointer to a descriptor and qsort doesn't know about it, then we lose.
>
> One way arou
On 12/18/18 8:32 AM, Jakub Jelinek wrote:
> On Tue, Dec 18, 2018 at 10:23:46AM -0500, Paul Koning wrote:
>>
>>
>>> On Dec 17, 2018, at 2:23 PM, Szabolcs Nagy wrote:
>>>
>>> On 17/12/2018 18:22, Uecker, Martin wrote:
>
> ...
So a thread_local static variable for storing the static
On Tue, Dec 18, 2018 at 10:23:46AM -0500, Paul Koning wrote:
>
>
> > On Dec 17, 2018, at 2:23 PM, Szabolcs Nagy wrote:
> >
> > On 17/12/2018 18:22, Uecker, Martin wrote:
> >>>
> >>> ...
> >>
> >> So a thread_local static variable for storing the static
> >> chain?
> >
> > something like that
> On Dec 17, 2018, at 2:23 PM, Szabolcs Nagy wrote:
>
> On 17/12/2018 18:22, Uecker, Martin wrote:
>>>
>>> ...
>>
>> So a thread_local static variable for storing the static
>> chain?
>
> something like that, but the more i think about it the
> harder it seems: the call site of the nested f
On 17/12/2018 18:22, Uecker, Martin wrote:
> Am Montag, den 17.12.2018, 15:25 + schrieb Szabolcs Nagy:
>> On 16/12/2018 22:45, Uecker, Martin wrote:
>>> Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law:
Ultimately using function descriptors is an ABI breaking choice and we
mig
On Dez 17 2018, "Uecker, Martin" wrote:
> Am Montag, den 17.12.2018, 10:28 -0700 schrieb Jeff Law:
>> On 12/16/18 3:45 PM, Uecker, Martin wrote:
>> > But most architectures require a higher alignment anyway.
>> > Here is a list of all targets where function alignment
>> > is 1 byte:
>> >
>> > gc
Am Montag, den 17.12.2018, 15:25 + schrieb Szabolcs Nagy:
> On 16/12/2018 22:45, Uecker, Martin wrote:
> > Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law:
> > > Ultimately using function descriptors is an ABI breaking choice and we
> > > might declare that function descriptors imply h
Am Montag, den 17.12.2018, 10:31 -0700 schrieb Martin Sebor:
> On 12/16/18 6:45 AM, Uecker, Martin wrote:
> > Am Freitag, den 14.12.2018, 18:20 -0700 schrieb Martin Sebor:
> > > On 12/14/18 4:36 PM, Jeff Law wrote:
> > > > On 12/14/18 3:05 AM, Uecker, Martin wrote:
> > > > >
> > > > > Am Donnersta
Am Montag, den 17.12.2018, 10:28 -0700 schrieb Jeff Law:
> On 12/16/18 3:45 PM, Uecker, Martin wrote:
> > Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law:
> > > On 12/16/18 6:45 AM, Uecker, Martin wrote:
> > > > Am Freitag, den 14.12.2018, 18:20 -0700 schrieb Martin Sebor:
> > > > > On 12/
On 12/16/18 6:45 AM, Uecker, Martin wrote:
Am Freitag, den 14.12.2018, 18:20 -0700 schrieb Martin Sebor:
On 12/14/18 4:36 PM, Jeff Law wrote:
On 12/14/18 3:05 AM, Uecker, Martin wrote:
Am Donnerstag, den 13.12.2018, 16:35 -0700 schrieb Jeff Law:
On 12/12/18 11:12 AM, Uecker, Martin wrote:
On 12/16/18 3:45 PM, Uecker, Martin wrote:
> Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law:
>> On 12/16/18 6:45 AM, Uecker, Martin wrote:
>>> Am Freitag, den 14.12.2018, 18:20 -0700 schrieb Martin Sebor:
On 12/14/18 4:36 PM, Jeff Law wrote:
> On 12/14/18 3:05 AM, Uecker, Martin
On 16/12/2018 22:45, Uecker, Martin wrote:
> Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law:
>> Ultimately using function descriptors is an ABI breaking choice and we
>> might declare that function descriptors imply higher function
>> alignments.
>
> Increasing the alignment is not an
Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law:
> On 12/16/18 6:45 AM, Uecker, Martin wrote:
> > Am Freitag, den 14.12.2018, 18:20 -0700 schrieb Martin Sebor:
> > > On 12/14/18 4:36 PM, Jeff Law wrote:
> > > > On 12/14/18 3:05 AM, Uecker, Martin wrote:
> > > > >
> > > > > Am Donnerstag,
On 12/16/18 6:45 AM, Uecker, Martin wrote:
> Am Freitag, den 14.12.2018, 18:20 -0700 schrieb Martin Sebor:
>> On 12/14/18 4:36 PM, Jeff Law wrote:
>>> On 12/14/18 3:05 AM, Uecker, Martin wrote:
Am Donnerstag, den 13.12.2018, 16:35 -0700 schrieb Jeff Law:
> On 12/12/18 11:12 AM, Uecker
Am Freitag, den 14.12.2018, 18:20 -0700 schrieb Martin Sebor:
> On 12/14/18 4:36 PM, Jeff Law wrote:
> > On 12/14/18 3:05 AM, Uecker, Martin wrote:
> > >
> > > Am Donnerstag, den 13.12.2018, 16:35 -0700 schrieb Jeff Law:
> > > > On 12/12/18 11:12 AM, Uecker, Martin wrote:
> > >
> > > ...
> > > >
On 12/14/18 4:36 PM, Jeff Law wrote:
On 12/14/18 3:05 AM, Uecker, Martin wrote:
Am Donnerstag, den 13.12.2018, 16:35 -0700 schrieb Jeff Law:
On 12/12/18 11:12 AM, Uecker, Martin wrote:
...
diff --git a/gcc/c/c-objc-common.h b/gcc/c/c-objc-common.h
index 78e768c2366..ef039560eb9 100644
--- a/
On 12/14/18 3:05 AM, Uecker, Martin wrote:
>
> Am Donnerstag, den 13.12.2018, 16:35 -0700 schrieb Jeff Law:
>> On 12/12/18 11:12 AM, Uecker, Martin wrote:
> ...
> diff --git a/gcc/c/c-objc-common.h b/gcc/c/c-objc-common.h
> index 78e768c2366..ef039560eb9 100644
> --- a/gcc/c/c-objc-com
Am Donnerstag, den 13.12.2018, 16:35 -0700 schrieb Jeff Law:
> On 12/12/18 11:12 AM, Uecker, Martin wrote:
...
> > > > diff --git a/gcc/c/c-objc-common.h b/gcc/c/c-objc-common.h
> > > > index 78e768c2366..ef039560eb9 100644
> > > > --- a/gcc/c/c-objc-common.h
> > > > +++ b/gcc/c/c-objc-common.h
On 12/12/18 11:12 AM, Uecker, Martin wrote:
>
> Hi Jeff,
>
> thank you. I fixed all the minor issues, but see below.
>
>
> Am Montag, den 03.12.2018, 14:56 -0700 schrieb Jeff Law:
>> On 11/4/18 1:48 PM, Uecker, Martin wrote:
>>> Hi Joseph,
>>>
>>> here is a new version of this patch which adds
Hi Jeff,
thank you. I fixed all the minor issues, but see below.
Am Montag, den 03.12.2018, 14:56 -0700 schrieb Jeff Law:
> On 11/4/18 1:48 PM, Uecker, Martin wrote:
> > Hi Joseph,
> >
> > here is a new version of this patch which adds a warning
> > for targets which do not support -fno-trampo
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