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* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
@ 2010-11-20  3:53 ` orangewarrior at gmail dot com
  2010-11-29 15:00 ` rguenth at gcc dot gnu.org
                   ` (13 subsequent siblings)
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From: orangewarrior at gmail dot com @ 2010-11-20  3:53 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

Lukasz Ligowski <orangewarrior at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |orangewarrior at gmail dot
                   |                            |com

--- Comment #5 from Lukasz Ligowski <orangewarrior at gmail dot com> 2010-11-20 01:56:34 UTC ---
works for me with ATmega2560 (arduino mega) on Gentoo gcc-4.5.1


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
  2010-11-20  3:53 ` [Bug target/45263] registers used in __do_global_ctors can get clobbered orangewarrior at gmail dot com
@ 2010-11-29 15:00 ` rguenth at gcc dot gnu.org
  2010-11-30 15:22 ` mschulze at ivs dot cs.ovgu.de
                   ` (12 subsequent siblings)
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From: rguenth at gcc dot gnu.org @ 2010-11-29 15:00 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mschulze at ivs dot
                   |                            |cs.ovgu.de

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-29 14:57:33 UTC ---
*** Bug 46706 has been marked as a duplicate of this bug. ***


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
  2010-11-20  3:53 ` [Bug target/45263] registers used in __do_global_ctors can get clobbered orangewarrior at gmail dot com
  2010-11-29 15:00 ` rguenth at gcc dot gnu.org
@ 2010-11-30 15:22 ` mschulze at ivs dot cs.ovgu.de
  2010-11-30 15:41 ` mschulze at ivs dot cs.ovgu.de
                   ` (11 subsequent siblings)
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From: mschulze at ivs dot cs.ovgu.de @ 2010-11-30 15:22 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #7 from Michael Schulze <mschulze at ivs dot cs.ovgu.de> 2010-11-30 15:16:20 UTC ---
Created attachment 22579
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22579
alternative patch using register r15 instead of r20 avoids pushing/poping

In reaction to bug 29141, which is still pending and not fixed, I offer a patch
that corrects the handling of global constructors. The fix proposed in bug
29141 leads to wrong handling of global constructors since gcc version 4.4.0.
And this is independent of the 64kB boundary because the handling is always
wrong.

With the first provided patch the register r20 was always pushed and popped but
this is not necessary. The global-constructors patch avoids this and uses r15
instead of r20. Due to the compiler abi the register r15 is left unchanged by
called routines, and it has to be saved/restored by routines that use it.

I applied the global-constructor patch and then the compiler generates correct
code for the execution of global constructors regardless of whether the
constructor is located below or above 64kB. I tested the patch by my own but I
think it needs further tests. Please try it out. I think without such a patch
independent of using my one or the r20 patch, this bug is a show stopper since
gcc version 4.4.0.


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (2 preceding siblings ...)
  2010-11-30 15:22 ` mschulze at ivs dot cs.ovgu.de
@ 2010-11-30 15:41 ` mschulze at ivs dot cs.ovgu.de
  2010-12-04  3:11 ` westfw at yahoo dot com
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From: mschulze at ivs dot cs.ovgu.de @ 2010-11-30 15:41 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #8 from Michael Schulze <mschulze at ivs dot cs.ovgu.de> 2010-11-30 15:21:57 UTC ---
Comment on attachment 22579
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22579
alternative patch using register r15 instead of r20 avoids pushing/poping

>diff -Naur gcc-4.5.1-orig/gcc/config/avr/libgcc.S gcc-4.5.1/gcc/config/avr/libgcc.S
>--- gcc-4.5.1-orig/gcc/config/avr/libgcc.S	2009-05-23 09:16:07.000000000 +0200
>+++ gcc-4.5.1/gcc/config/avr/libgcc.S	2010-11-30 14:35:53.000000000 +0100
>@@ -792,21 +792,22 @@
> __do_global_ctors:
> 	ldi	r17, hi8(__ctors_start)
> 	ldi	r16, hh8(__ctors_start)
>-	ldi	r28, lo8(__ctors_end)
>+	ldi	r28, hh8(__ctors_end)
>+	mov	r15, r28
>+      ldi	r28, lo8(__ctors_end)
> 	ldi	r29, hi8(__ctors_end)
>-	ldi	r20, hh8(__ctors_end)
> 	rjmp	.L__do_global_ctors_start
> .L__do_global_ctors_loop:
> 	sbiw	r28, 2
>-	sbc     r20, __zero_reg__
>+	sbc     r15, __zero_reg__
> 	mov_h	r31, r29
> 	mov_l	r30, r28
>-	out     __RAMPZ__, r20
>+	out     __RAMPZ__, r15
> 	XCALL	__tablejump_elpm__
> .L__do_global_ctors_start:
> 	cpi	r28, lo8(__ctors_start)
> 	cpc	r29, r17
>-	cpc	r20, r16
>+	cpc	r15, r16
> 	brne	.L__do_global_ctors_loop
> #else
> __do_global_ctors:
>@@ -833,21 +834,22 @@
> __do_global_dtors:
> 	ldi	r17, hi8(__dtors_end)
> 	ldi	r16, hh8(__dtors_end)
>+	ldi	r28, hh8(__dtors_start)
>+	mov	r15, r28
> 	ldi	r28, lo8(__dtors_start)
> 	ldi	r29, hi8(__dtors_start)
>-	ldi	r20, hh8(__dtors_start)
> 	rjmp	.L__do_global_dtors_start
> .L__do_global_dtors_loop:
> 	sbiw	r28, 2
>-	sbc     r20, __zero_reg__
>+	sbc     r15, __zero_reg__
> 	mov_h	r31, r29
> 	mov_l	r30, r28
>-	out     __RAMPZ__, r20
>+	out     __RAMPZ__, r15
> 	XCALL	__tablejump_elpm__
> .L__do_global_dtors_start:
> 	cpi	r28, lo8(__dtors_end)
> 	cpc	r29, r17
>-	cpc	r20, r16
>+	cpc	r15, r16
> 	brne	.L__do_global_dtors_loop
> #else
> __do_global_dtors:


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (3 preceding siblings ...)
  2010-11-30 15:41 ` mschulze at ivs dot cs.ovgu.de
@ 2010-12-04  3:11 ` westfw at yahoo dot com
  2010-12-05 19:53 ` eric.weddington at atmel dot com
                   ` (9 subsequent siblings)
  14 siblings, 0 replies; 22+ messages in thread
From: westfw at yahoo dot com @ 2010-12-04  3:11 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #9 from Bill Westfield <westfw at yahoo dot com> 2010-12-04 03:11:23 UTC ---
This is essentially identical to the patch I provided for
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44617
so it looks good to me.
I had two worries:
Is R15 used anywhere else in startup code that might not obey the register save
conventions (ie does do_global_ctors need to preserve R15)
The AVR has a lot of opcodes that are not valid on registers less than 16.  It
doesn't look like any of these are used here, but I wasn't 100% positive that
using R15 wouldn't cause problems...


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (4 preceding siblings ...)
  2010-12-04  3:11 ` westfw at yahoo dot com
@ 2010-12-05 19:53 ` eric.weddington at atmel dot com
  2010-12-06  9:08 ` mschulze at ivs dot cs.ovgu.de
                   ` (8 subsequent siblings)
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From: eric.weddington at atmel dot com @ 2010-12-05 19:53 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #10 from Eric Weddington <eric.weddington at atmel dot com> 2010-12-05 19:52:33 UTC ---
(In reply to comment #9)

> Is R15 used anywhere else in startup code that might not obey the register save
> conventions (ie does do_global_ctors need to preserve R15)

I strongly suggest not using R15. The ATtiny10 Family of devices
(ATtiny10/4/5/9/20/40) only has R16-R31. So using R15 won't work for this class
of devices. It would be best if we can find a register that will for all AVR
devices.


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* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (5 preceding siblings ...)
  2010-12-05 19:53 ` eric.weddington at atmel dot com
@ 2010-12-06  9:08 ` mschulze at ivs dot cs.ovgu.de
  2011-04-13 16:38 ` gjl at gcc dot gnu.org
                   ` (7 subsequent siblings)
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From: mschulze at ivs dot cs.ovgu.de @ 2010-12-06  9:08 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #11 from Michael Schulze <mschulze at ivs dot cs.ovgu.de> 2010-12-06 09:07:19 UTC ---
(In reply to comment #9)
> This is essentially identical to the patch I provided for
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44617
> so it looks good to me.
I hadn't see that patch but you are right it's almost identical. 

> I had two worries:
> Is R15 used anywhere else in startup code that might not obey the register
> save conventions (ie does do_global_ctors need to preserve R15)
> The AVR has a lot of opcodes that are not valid on registers less than 16.  It
> doesn't look like any of these are used here, but I wasn't 100% positive that
> using R15 wouldn't cause problems...
As far as I know r15 isn't used elsewhere in the start-up code and also your
second worry seems not to be a problem, because such instructions are not used
by that time.


(In reply to comment #10)
> I strongly suggest not using R15. The ATtiny10 Family of devices
> (ATtiny10/4/5/9/20/40) only has R16-R31. So using R15 won't work for this
> class of devices.
I disagree because the additional register is only in the start up code of
devices that have rampz and is omitted in all other cases. The ATtiny don't 
have a rampz (correct me if I'm wrong) thus they are not faced with the 
discussed problem in general. IMO, it is absolutely possible and correct to use 
r15 here. 

> It would be best if we can find a register that will for all AVR
> devices.
Due to the compiler's C calling conventions, there are no other free registers
to use without the need of pushing and popping this registers. Only registers
below r16 are free to use. All other free r16,r17,r28,r29 are already in use.


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (6 preceding siblings ...)
  2010-12-06  9:08 ` mschulze at ivs dot cs.ovgu.de
@ 2011-04-13 16:38 ` gjl at gcc dot gnu.org
  2011-04-13 16:46 ` gjl at gcc dot gnu.org
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From: gjl at gcc dot gnu.org @ 2011-04-13 16:38 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #12 from gjl at gcc dot gnu.org 2011-04-13 16:36:57 UTC ---
Author: gjl
Date: Wed Apr 13 16:36:50 2011
New Revision: 172384

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172384
Log:
    PR target/45263
    * config/avr/libgcc.S (__do_global_ctors, __do_global_dtors): Save
    R20 around calls of __tablejump_elpm__


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/libgcc.S


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (7 preceding siblings ...)
  2011-04-13 16:38 ` gjl at gcc dot gnu.org
@ 2011-04-13 16:46 ` gjl at gcc dot gnu.org
  2011-04-14 15:40 ` gjl at gcc dot gnu.org
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From: gjl at gcc dot gnu.org @ 2011-04-13 16:46 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #13 from gjl at gcc dot gnu.org 2011-04-13 16:46:32 UTC ---
Author: gjl
Date: Wed Apr 13 16:46:29 2011
New Revision: 172385

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172385
Log:
Fix ChangeLog entry for PR target/45263


Modified:
    trunk/gcc/ChangeLog


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (8 preceding siblings ...)
  2011-04-13 16:46 ` gjl at gcc dot gnu.org
@ 2011-04-14 15:40 ` gjl at gcc dot gnu.org
  2011-05-30  8:56 ` gjl at gcc dot gnu.org
                   ` (4 subsequent siblings)
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From: gjl at gcc dot gnu.org @ 2011-04-14 15:40 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |gjl at gcc dot gnu.org
      Known to work|                            |4.7.0
         Resolution|                            |FIXED

--- Comment #14 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-04-14 15:40:11 UTC ---
Closed as resolved+fixed in 4.7.0


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (9 preceding siblings ...)
  2011-04-14 15:40 ` gjl at gcc dot gnu.org
@ 2011-05-30  8:56 ` gjl at gcc dot gnu.org
  2011-05-30 15:23 ` gjl at gcc dot gnu.org
                   ` (3 subsequent siblings)
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From: gjl at gcc dot gnu.org @ 2011-05-30  8:56 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #15 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-05-30 08:53:15 UTC ---
Author: gjl
Date: Mon May 30 08:53:12 2011
New Revision: 174427

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=174427
Log:
    PR target/45263
    * config/avr/libgcc.S (__do_global_ctors, __do_global_dtors):
    Don't use r20 around calls of __tablejump_elpm__

Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/config/avr/libgcc.S


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (10 preceding siblings ...)
  2011-05-30  8:56 ` gjl at gcc dot gnu.org
@ 2011-05-30 15:23 ` gjl at gcc dot gnu.org
  2012-05-02 17:25 ` gjl at gcc dot gnu.org
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From: gjl at gcc dot gnu.org @ 2011-05-30 15:23 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|4.6.1                       |4.5.1
   Target Milestone|---                         |4.6.1


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (11 preceding siblings ...)
  2011-05-30 15:23 ` gjl at gcc dot gnu.org
@ 2012-05-02 17:25 ` gjl at gcc dot gnu.org
  2012-05-02 17:28 ` gjl at gcc dot gnu.org
  2014-03-31 20:09 ` gjl at gcc dot gnu.org
  14 siblings, 0 replies; 22+ messages in thread
From: gjl at gcc dot gnu.org @ 2012-05-02 17:25 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

--- Comment #16 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-05-02 17:23:14 UTC ---
Author: gjl
Date: Wed May  2 17:23:06 2012
New Revision: 187058

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187058
Log:
    Backport from 2011-05-30 4.6-branch r174427.
    PR target/45263
    * config/avr/libgcc.S (__do_global_ctors, __do_global_dtors):
    Don't use r20 around calls of __tablejump_elpm__


Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/config/avr/libgcc.S


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
       [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
                   ` (12 preceding siblings ...)
  2012-05-02 17:25 ` gjl at gcc dot gnu.org
@ 2012-05-02 17:28 ` gjl at gcc dot gnu.org
  2014-03-31 20:09 ` gjl at gcc dot gnu.org
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From: gjl at gcc dot gnu.org @ 2012-05-02 17:28 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
      Known to work|4.7.0                       |4.5.4
      Known to fail|                            |4.5.3

--- Comment #17 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-05-02 17:24:38 UTC ---
Backport to 4.5.4


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* [Bug target/45263] registers used in __do_global_ctors can get clobbered
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                   ` (13 preceding siblings ...)
  2012-05-02 17:28 ` gjl at gcc dot gnu.org
@ 2014-03-31 20:09 ` gjl at gcc dot gnu.org
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  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bobf at mrp3 dot com

--- Comment #18 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
*** Bug 60247 has been marked as a duplicate of this bug. ***


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
  2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
                   ` (5 preceding siblings ...)
  2010-08-22 13:26 ` eric dot weddington at atmel dot com
@ 2010-08-22 15:56 ` ah dot linder at arcor dot de
  6 siblings, 0 replies; 22+ messages in thread
From: ah dot linder at arcor dot de @ 2010-08-22 15:56 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #4 from ah dot linder at arcor dot de  2010-08-22 15:56 -------
HelloWorld arduino sketch works now with atmega1280 & gcc-4.5.1. Thanks.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263


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* [Bug target/45263] registers used in __do_global_ctors can get clobbered
  2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
                   ` (4 preceding siblings ...)
  2010-08-12  2:40 ` gcc at d-silva dot org
@ 2010-08-22 13:26 ` eric dot weddington at atmel dot com
  2010-08-22 15:56 ` ah dot linder at arcor dot de
  6 siblings, 0 replies; 22+ messages in thread
From: eric dot weddington at atmel dot com @ 2010-08-22 13:26 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #3 from eric dot weddington at atmel dot com  2010-08-22 13:26 -------
*** Bug 44617 has been marked as a duplicate of this bug. ***


-- 

eric dot weddington at atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |scott at perturb dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263


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* [Bug target/45263] registers used in __do_global_ctors can get clobbered
  2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
                   ` (3 preceding siblings ...)
  2010-08-12  1:23 ` gcc at d-silva dot org
@ 2010-08-12  2:40 ` gcc at d-silva dot org
  2010-08-22 13:26 ` eric dot weddington at atmel dot com
  2010-08-22 15:56 ` ah dot linder at arcor dot de
  6 siblings, 0 replies; 22+ messages in thread
From: gcc at d-silva dot org @ 2010-08-12  2:40 UTC (permalink / raw)
  To: gcc-bugs



-- 

gcc at d-silva dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|blocker                     |normal


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263


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* [Bug target/45263] registers used in __do_global_ctors can get clobbered
  2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
                   ` (2 preceding siblings ...)
  2010-08-12  1:22 ` gcc at d-silva dot org
@ 2010-08-12  1:23 ` gcc at d-silva dot org
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                   ` (2 subsequent siblings)
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From: gcc at d-silva dot org @ 2010-08-12  1:23 UTC (permalink / raw)
  To: gcc-bugs



-- 

gcc at d-silva dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |blocker


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
  2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
  2010-08-12  1:21 ` [Bug target/45263] " pinskia at gcc dot gnu dot org
  2010-08-12  1:21 ` gcc at d-silva dot org
@ 2010-08-12  1:22 ` gcc at d-silva dot org
  2010-08-12  1:23 ` gcc at d-silva dot org
                   ` (3 subsequent siblings)
  6 siblings, 0 replies; 22+ messages in thread
From: gcc at d-silva dot org @ 2010-08-12  1:22 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #2 from gcc at d-silva dot org  2010-08-12 01:22 -------
Created an attachment (id=21461)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21461&action=view)
Patch to gcc/config/avr/libgcc.S saving r20 onto the stack before calling
constructors


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
  2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
  2010-08-12  1:21 ` [Bug target/45263] " pinskia at gcc dot gnu dot org
@ 2010-08-12  1:21 ` gcc at d-silva dot org
  2010-08-12  1:22 ` gcc at d-silva dot org
                   ` (4 subsequent siblings)
  6 siblings, 0 replies; 22+ messages in thread
From: gcc at d-silva dot org @ 2010-08-12  1:21 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #1 from gcc at d-silva dot org  2010-08-12 01:21 -------
Created an attachment (id=21460)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21460&action=view)
Test case showing that register r20 is clobbered when calling a constructor


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263


^ permalink raw reply	[flat|nested] 22+ messages in thread
* [Bug target/45263] registers used in __do_global_ctors can get clobbered
  2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
@ 2010-08-12  1:21 ` pinskia at gcc dot gnu dot org
  2010-08-12  1:21 ` gcc at d-silva dot org
                   ` (5 subsequent siblings)
  6 siblings, 0 replies; 22+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2010-08-12  1:21 UTC (permalink / raw)
  To: gcc-bugs



-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|blocker                     |normal


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45263


^ permalink raw reply	[flat|nested] 22+ messages in thread
end of thread, other threads:[~2014-03-31 20:09 UTC | newest]

Thread overview: 22+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <bug-45263-4@http.gcc.gnu.org/bugzilla/>
2010-11-20  3:53 ` [Bug target/45263] registers used in __do_global_ctors can get clobbered orangewarrior at gmail dot com
2010-11-29 15:00 ` rguenth at gcc dot gnu.org
2010-11-30 15:22 ` mschulze at ivs dot cs.ovgu.de
2010-11-30 15:41 ` mschulze at ivs dot cs.ovgu.de
2010-12-04  3:11 ` westfw at yahoo dot com
2010-12-05 19:53 ` eric.weddington at atmel dot com
2010-12-06  9:08 ` mschulze at ivs dot cs.ovgu.de
2011-04-13 16:38 ` gjl at gcc dot gnu.org
2011-04-13 16:46 ` gjl at gcc dot gnu.org
2011-04-14 15:40 ` gjl at gcc dot gnu.org
2011-05-30  8:56 ` gjl at gcc dot gnu.org
2011-05-30 15:23 ` gjl at gcc dot gnu.org
2012-05-02 17:25 ` gjl at gcc dot gnu.org
2012-05-02 17:28 ` gjl at gcc dot gnu.org
2014-03-31 20:09 ` gjl at gcc dot gnu.org
2010-08-12  1:20 [Bug c/45263] New: " gcc at d-silva dot org
2010-08-12  1:21 ` [Bug target/45263] " pinskia at gcc dot gnu dot org
2010-08-12  1:21 ` gcc at d-silva dot org
2010-08-12  1:22 ` gcc at d-silva dot org
2010-08-12  1:23 ` gcc at d-silva dot org
2010-08-12  2:40 ` gcc at d-silva dot org
2010-08-22 13:26 ` eric dot weddington at atmel dot com
2010-08-22 15:56 ` ah dot linder at arcor dot de

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