barebox compilation with gcc 4.5.2 and ptxdist

barebox compilation with gcc 4.5.2 and ptxdist

[Andre Naujoks]

Hello.

We are currently trying to compile a barebox with the git version of
ptxdist and the git version of the OSELAS generic Toolchain for powerpc.

Also the current 2011.07.0 release of barebox.

We are having some problems during the build, which I think are a result
of some changes in gcc's optimizations (since 4.4.something). GCC uses
some functions on the ppc platform to optimze the size of the resulting
binary, which are only present in the libgcc.a.

The compile stage works fine up tp the last linker step:

  CC      arch/ppc/lib/time.o
  AS      arch/ppc/lib/misc.o
  CC      arch/ppc/lib/ppclinux.o
  CC      arch/ppc/lib/board_data.o
  LD      arch/ppc/lib/built-in.o
  LD      barebox
common/built-in.o: In function `mapset':
hush.c:(.text.mapset+0x44): undefined reference to `_restgpr_30_x'
common/built-in.o: In function `syntax_err':
hush.c:(.text.syntax_err+0x34): undefined reference to `_restgpr_30_x'
common/built-in.o: In function `done_command':
hush.c:(.text.done_command+0x94): undefined reference to `_restgpr_29_x'
common/built-in.o: In function `done_pipe':
hush.c:(.text.done_pipe+0x5c): undefined reference to `_restgpr_29_x'
common/built-in.o: In function `is_assignment':
hush.c:(.text.is_assignment+0x8c): undefined reference to `_restgpr_27_x'
common/built-in.o: In function `b_addchr':
hush.c:(.text.b_addchr+0x8c): undefined reference to `_restgpr_28_x'
common/built-in.o: In function `b_addqchr':
hush.c:(.text.b_addqchr+0x78): undefined reference to `_restgpr_29_x'
...


This goes on for a few pages.

As far as I can see, the possibilities I have here, is to either
integrate the missing functions out of the gcc sources into barebox, or
make barebox link with libgcc, which seems surprisingly difficult, due
to the unfamiliar (to me) build process. A simple LDFLAGS_barebox+=-l..
-L.. did not help here.

Am I right with this assumption, or am I missing something else here?

Any help would really be appreciated.

Regards
  Andre Naujoks

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Re: barebox compilation with gcc 4.5.2 and ptxdist

[Marc Kleine-Budde]

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On 07/26/2011 03:56 PM, Andre Naujoks wrote:
> Hello.
> 
> We are currently trying to compile a barebox with the git version of
> ptxdist and the git version of the OSELAS generic Toolchain for powerpc.
> 
> Also the current 2011.07.0 release of barebox.
> 
> We are having some problems during the build, which I think are a result
> of some changes in gcc's optimizations (since 4.4.something). GCC uses
> some functions on the ppc platform to optimze the size of the resulting
> binary, which are only present in the libgcc.a.
> 
> The compile stage works fine up tp the last linker step:
> 
>   CC      arch/ppc/lib/time.o
>   AS      arch/ppc/lib/misc.o
>   CC      arch/ppc/lib/ppclinux.o
>   CC      arch/ppc/lib/board_data.o
>   LD      arch/ppc/lib/built-in.o
>   LD      barebox
> common/built-in.o: In function `mapset':
> hush.c:(.text.mapset+0x44): undefined reference to `_restgpr_30_x'
> common/built-in.o: In function `syntax_err':
> hush.c:(.text.syntax_err+0x34): undefined reference to `_restgpr_30_x'
> common/built-in.o: In function `done_command':
> hush.c:(.text.done_command+0x94): undefined reference to `_restgpr_29_x'
> common/built-in.o: In function `done_pipe':
> hush.c:(.text.done_pipe+0x5c): undefined reference to `_restgpr_29_x'
> common/built-in.o: In function `is_assignment':
> hush.c:(.text.is_assignment+0x8c): undefined reference to `_restgpr_27_x'
> common/built-in.o: In function `b_addchr':
> hush.c:(.text.b_addchr+0x8c): undefined reference to `_restgpr_28_x'
> common/built-in.o: In function `b_addqchr':
> hush.c:(.text.b_addqchr+0x78): undefined reference to `_restgpr_29_x'
> ...
> 
> 
> This goes on for a few pages.
> 
> As far as I can see, the possibilities I have here, is to either
> integrate the missing functions out of the gcc sources into barebox, or
> make barebox link with libgcc, which seems surprisingly difficult, due
> to the unfamiliar (to me) build process. A simple LDFLAGS_barebox+=-l..
> -L.. did not help here.
> 
> Am I right with this assumption, or am I missing something else here?

We don't want to link barebox against libgcc, that's bad style. I
suggest to port arch/powerpc/lib/crtsavres.S from the linux kernel to
barebox.

cheers, Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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Re: barebox compilation with gcc 4.5.2 and ptxdist

[Jean-Christophe PLAGNIOL-VILLARD]

On 16:20 Tue 26 Jul     , Marc Kleine-Budde wrote:
> On 07/26/2011 03:56 PM, Andre Naujoks wrote:
> > Hello.
> > 
> > We are currently trying to compile a barebox with the git version of
> > ptxdist and the git version of the OSELAS generic Toolchain for powerpc.
> > 
> > Also the current 2011.07.0 release of barebox.
> > 
> > We are having some problems during the build, which I think are a result
> > of some changes in gcc's optimizations (since 4.4.something). GCC uses
> > some functions on the ppc platform to optimze the size of the resulting
> > binary, which are only present in the libgcc.a.
> > 
> > The compile stage works fine up tp the last linker step:
> > 
> >   CC      arch/ppc/lib/time.o
> >   AS      arch/ppc/lib/misc.o
> >   CC      arch/ppc/lib/ppclinux.o
> >   CC      arch/ppc/lib/board_data.o
> >   LD      arch/ppc/lib/built-in.o
> >   LD      barebox
> > common/built-in.o: In function `mapset':
> > hush.c:(.text.mapset+0x44): undefined reference to `_restgpr_30_x'
> > common/built-in.o: In function `syntax_err':
> > hush.c:(.text.syntax_err+0x34): undefined reference to `_restgpr_30_x'
> > common/built-in.o: In function `done_command':
> > hush.c:(.text.done_command+0x94): undefined reference to `_restgpr_29_x'
> > common/built-in.o: In function `done_pipe':
> > hush.c:(.text.done_pipe+0x5c): undefined reference to `_restgpr_29_x'
> > common/built-in.o: In function `is_assignment':
> > hush.c:(.text.is_assignment+0x8c): undefined reference to `_restgpr_27_x'
> > common/built-in.o: In function `b_addchr':
> > hush.c:(.text.b_addchr+0x8c): undefined reference to `_restgpr_28_x'
> > common/built-in.o: In function `b_addqchr':
> > hush.c:(.text.b_addqchr+0x78): undefined reference to `_restgpr_29_x'
> > ...
> > 
> > 
> > This goes on for a few pages.
> > 
> > As far as I can see, the possibilities I have here, is to either
> > integrate the missing functions out of the gcc sources into barebox, or
> > make barebox link with libgcc, which seems surprisingly difficult, due
> > to the unfamiliar (to me) build process. A simple LDFLAGS_barebox+=-l..
> > -L.. did not help here.
> > 
> > Am I right with this assumption, or am I missing something else here?
> 
> We don't want to link barebox against libgcc, that's bad style. I
> suggest to port arch/powerpc/lib/crtsavres.S from the linux kernel to
> barebox.
> 
agreed at 100%

Best Regards,
J.

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Re: barebox compilation with gcc 4.5.2 and ptxdist

[Andre Naujoks]

Am 26.07.2011 16:20, schrieb Marc Kleine-Budde:
> On 07/26/2011 03:56 PM, Andre Naujoks wrote:
>> Hello.
>>
>> We are currently trying to compile a barebox with the git version of
>> ptxdist and the git version of the OSELAS generic Toolchain for powerpc.
>>
>> Also the current 2011.07.0 release of barebox.
>>
>> We are having some problems during the build, which I think are a result
>> of some changes in gcc's optimizations (since 4.4.something). GCC uses
>> some functions on the ppc platform to optimze the size of the resulting
>> binary, which are only present in the libgcc.a.
>>
>> The compile stage works fine up tp the last linker step:
>>
>>   CC      arch/ppc/lib/time.o
>>   AS      arch/ppc/lib/misc.o
>>   CC      arch/ppc/lib/ppclinux.o
>>   CC      arch/ppc/lib/board_data.o
>>   LD      arch/ppc/lib/built-in.o
>>   LD      barebox
>> common/built-in.o: In function `mapset':
>> hush.c:(.text.mapset+0x44): undefined reference to `_restgpr_30_x'
>> common/built-in.o: In function `syntax_err':
>> hush.c:(.text.syntax_err+0x34): undefined reference to `_restgpr_30_x'
>> common/built-in.o: In function `done_command':
>> hush.c:(.text.done_command+0x94): undefined reference to `_restgpr_29_x'
>> common/built-in.o: In function `done_pipe':
>> hush.c:(.text.done_pipe+0x5c): undefined reference to `_restgpr_29_x'
>> common/built-in.o: In function `is_assignment':
>> hush.c:(.text.is_assignment+0x8c): undefined reference to `_restgpr_27_x'
>> common/built-in.o: In function `b_addchr':
>> hush.c:(.text.b_addchr+0x8c): undefined reference to `_restgpr_28_x'
>> common/built-in.o: In function `b_addqchr':
>> hush.c:(.text.b_addqchr+0x78): undefined reference to `_restgpr_29_x'
>> ...
>>
>>
>> This goes on for a few pages.
>>
>> As far as I can see, the possibilities I have here, is to either
>> integrate the missing functions out of the gcc sources into barebox, or
>> make barebox link with libgcc, which seems surprisingly difficult, due
>> to the unfamiliar (to me) build process. A simple LDFLAGS_barebox+=-l..
>> -L.. did not help here.
>>
>> Am I right with this assumption, or am I missing something else here?
> 
> We don't want to link barebox against libgcc, that's bad style. I
> suggest to port arch/powerpc/lib/crtsavres.S from the linux kernel to
> barebox.

Thanks. I will give this a shot and see how far I get. If it works I
will come back with a patch.

> 
> cheers, Marc
> 

Regards
  Andre

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Re: barebox compilation with gcc 4.5.2 and ptxdist

[Andre Naujoks]

Am 27.07.2011 08:40, schrieb Andre Naujoks:
> Am 26.07.2011 16:20, schrieb Marc Kleine-Budde:
>> On 07/26/2011 03:56 PM, Andre Naujoks wrote:
>>> Hello.
>>>
>>> We are currently trying to compile a barebox with the git version of
>>> ptxdist and the git version of the OSELAS generic Toolchain for powerpc.
>>>
>>> Also the current 2011.07.0 release of barebox.
>>>
>>> We are having some problems during the build, which I think are a result
>>> of some changes in gcc's optimizations (since 4.4.something). GCC uses
>>> some functions on the ppc platform to optimze the size of the resulting
>>> binary, which are only present in the libgcc.a.
>>>
>>> The compile stage works fine up tp the last linker step:
>>>
>>>   CC      arch/ppc/lib/time.o
>>>   AS      arch/ppc/lib/misc.o
>>>   CC      arch/ppc/lib/ppclinux.o
>>>   CC      arch/ppc/lib/board_data.o
>>>   LD      arch/ppc/lib/built-in.o
>>>   LD      barebox
>>> common/built-in.o: In function `mapset':
>>> hush.c:(.text.mapset+0x44): undefined reference to `_restgpr_30_x'
>>> common/built-in.o: In function `syntax_err':
>>> hush.c:(.text.syntax_err+0x34): undefined reference to `_restgpr_30_x'
>>> common/built-in.o: In function `done_command':
>>> hush.c:(.text.done_command+0x94): undefined reference to `_restgpr_29_x'
>>> common/built-in.o: In function `done_pipe':
>>> hush.c:(.text.done_pipe+0x5c): undefined reference to `_restgpr_29_x'
>>> common/built-in.o: In function `is_assignment':
>>> hush.c:(.text.is_assignment+0x8c): undefined reference to `_restgpr_27_x'
>>> common/built-in.o: In function `b_addchr':
>>> hush.c:(.text.b_addchr+0x8c): undefined reference to `_restgpr_28_x'
>>> common/built-in.o: In function `b_addqchr':
>>> hush.c:(.text.b_addqchr+0x78): undefined reference to `_restgpr_29_x'
>>> ...
>>>
>>>
>>> This goes on for a few pages.
>>>
>>> As far as I can see, the possibilities I have here, is to either
>>> integrate the missing functions out of the gcc sources into barebox, or
>>> make barebox link with libgcc, which seems surprisingly difficult, due
>>> to the unfamiliar (to me) build process. A simple LDFLAGS_barebox+=-l..
>>> -L.. did not help here.
>>>
>>> Am I right with this assumption, or am I missing something else here?
>>
>> We don't want to link barebox against libgcc, that's bad style. I
>> suggest to port arch/powerpc/lib/crtsavres.S from the linux kernel to
>> barebox.
> 
> Thanks. I will give this a shot and see how far I get. If it works I
> will come back with a patch.

Hi.

With a little help from a collegue, we came up with the patches in the
followong mails. Basically the kernel files without the 64 bit parts.

The second patch was another part of libgcc, which seemed to fit best in
the misc.S file, which was already present.

Regards
  Andre

> 
>>
>> cheers, Marc
>>
> 
> Regards
>   Andre


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[PATCH 1/2] Re: barebox compilation with gcc 4.5.2 and ptxdist

[Andre Naujoks]

From c479527616c5fc79c608e21573373a5a324f6e9b Mon Sep 17 00:00:00 2001
From: Andre Naujoks <nautsch2@googlemail.com>
Date: Wed, 27 Jul 2011 11:28:35 +0200
Subject: [PATCH 1/2] Ported crtsavres from linux kernel to barebox

---
 arch/ppc/lib/Makefile    |    1 +
 arch/ppc/lib/crtsavres.S |  239
++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 240 insertions(+), 0 deletions(-)
 create mode 100644 arch/ppc/lib/crtsavres.S

diff --git a/arch/ppc/lib/Makefile b/arch/ppc/lib/Makefile
index 0844d56..c35fd08 100644
--- a/arch/ppc/lib/Makefile
+++ b/arch/ppc/lib/Makefile
@@ -10,4 +10,5 @@ obj-y += misc.o
 obj-$(CONFIG_CMD_BOOTM) += ppclinux.o
 obj-y += board_data.o
 obj-$(CONFIG_MODULES) += module.o
+obj-y += crtsavres.o

diff --git a/arch/ppc/lib/crtsavres.S b/arch/ppc/lib/crtsavres.S
new file mode 100644
index 0000000..f9d7cb6
--- /dev/null
+++ b/arch/ppc/lib/crtsavres.S
@@ -0,0 +1,239 @@
+/*
+ * Special support for eabi and SVR4
+ *
+ *   Copyright (C) 1995, 1996, 1998, 2000, 2001 Free Software
Foundation, Inc.
+ *   Copyright 2008 Freescale Semiconductor, Inc.
+ *   Written By Michael Meissner
+ *
+ * Based on gcc/config/rs6000/crtsavres.asm from gcc
+ * 64 bit additions from reading the PPC elf64abi document.
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * In addition to the permissions in the GNU General Public License, the
+ * Free Software Foundation gives you unlimited permission to link the
+ * compiled version of this file with other programs, and to distribute
+ * those programs without any restriction coming from the use of this
+ * file.  (The General Public License restrictions do apply in other
+ * respects; for example, they cover modification of the file, and
+ * distribution when not linked into another program.)
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ *    As a special exception, if you link this library with files
+ *    compiled with GCC to produce an executable, this does not cause
+ *    the resulting executable to be covered by the GNU General Public
License.
+ *    This exception does not however invalidate any other reasons why
+ *    the executable file might be covered by the GNU General Public
License.
+ */
+
+#include <asm/ppc_asm.tmpl>
+
+#define N_FUN   36
+
+#define __stringify_1(x...)	#x
+#define __stringify(x...)	__stringify_1(x)
+
+#define _GLOBAL(n)	\
+	.text;		\
+	.stabs __stringify(n:F-1),N_FUN,0,0,n;\
+	.globl n;	\
+n:
+
+	.file	"crtsavres.S"
+	.section ".text"
+
+/* Routines for saving integer registers, called by the compiler.  */
+/* Called with r11 pointing to the stack header word of the caller of
the */
+/* function, just beyond the end of the integer save area.  */
+
+_GLOBAL(_savegpr_14)
+_GLOBAL(_save32gpr_14)
+	stw	14,-72(11)	/* save gp registers */
+_GLOBAL(_savegpr_15)
+_GLOBAL(_save32gpr_15)
+	stw	15,-68(11)
+_GLOBAL(_savegpr_16)
+_GLOBAL(_save32gpr_16)
+	stw	16,-64(11)
+_GLOBAL(_savegpr_17)
+_GLOBAL(_save32gpr_17)
+	stw	17,-60(11)
+_GLOBAL(_savegpr_18)
+_GLOBAL(_save32gpr_18)
+	stw	18,-56(11)
+_GLOBAL(_savegpr_19)
+_GLOBAL(_save32gpr_19)
+	stw	19,-52(11)
+_GLOBAL(_savegpr_20)
+_GLOBAL(_save32gpr_20)
+	stw	20,-48(11)
+_GLOBAL(_savegpr_21)
+_GLOBAL(_save32gpr_21)
+	stw	21,-44(11)
+_GLOBAL(_savegpr_22)
+_GLOBAL(_save32gpr_22)
+	stw	22,-40(11)
+_GLOBAL(_savegpr_23)
+_GLOBAL(_save32gpr_23)
+	stw	23,-36(11)
+_GLOBAL(_savegpr_24)
+_GLOBAL(_save32gpr_24)
+	stw	24,-32(11)
+_GLOBAL(_savegpr_25)
+_GLOBAL(_save32gpr_25)
+	stw	25,-28(11)
+_GLOBAL(_savegpr_26)
+_GLOBAL(_save32gpr_26)
+	stw	26,-24(11)
+_GLOBAL(_savegpr_27)
+_GLOBAL(_save32gpr_27)
+	stw	27,-20(11)
+_GLOBAL(_savegpr_28)
+_GLOBAL(_save32gpr_28)
+	stw	28,-16(11)
+_GLOBAL(_savegpr_29)
+_GLOBAL(_save32gpr_29)
+	stw	29,-12(11)
+_GLOBAL(_savegpr_30)
+_GLOBAL(_save32gpr_30)
+	stw	30,-8(11)
+_GLOBAL(_savegpr_31)
+_GLOBAL(_save32gpr_31)
+	stw	31,-4(11)
+	blr
+
+/* Routines for restoring integer registers, called by the compiler.  */
+/* Called with r11 pointing to the stack header word of the caller of
the */
+/* function, just beyond the end of the integer restore area.  */
+
+_GLOBAL(_restgpr_14)
+_GLOBAL(_rest32gpr_14)
+	lwz	14,-72(11)	/* restore gp registers */
+_GLOBAL(_restgpr_15)
+_GLOBAL(_rest32gpr_15)
+	lwz	15,-68(11)
+_GLOBAL(_restgpr_16)
+_GLOBAL(_rest32gpr_16)
+	lwz	16,-64(11)
+_GLOBAL(_restgpr_17)
+_GLOBAL(_rest32gpr_17)
+	lwz	17,-60(11)
+_GLOBAL(_restgpr_18)
+_GLOBAL(_rest32gpr_18)
+	lwz	18,-56(11)
+_GLOBAL(_restgpr_19)
+_GLOBAL(_rest32gpr_19)
+	lwz	19,-52(11)
+_GLOBAL(_restgpr_20)
+_GLOBAL(_rest32gpr_20)
+	lwz	20,-48(11)
+_GLOBAL(_restgpr_21)
+_GLOBAL(_rest32gpr_21)
+	lwz	21,-44(11)
+_GLOBAL(_restgpr_22)
+_GLOBAL(_rest32gpr_22)
+	lwz	22,-40(11)
+_GLOBAL(_restgpr_23)
+_GLOBAL(_rest32gpr_23)
+	lwz	23,-36(11)
+_GLOBAL(_restgpr_24)
+_GLOBAL(_rest32gpr_24)
+	lwz	24,-32(11)
+_GLOBAL(_restgpr_25)
+_GLOBAL(_rest32gpr_25)
+	lwz	25,-28(11)
+_GLOBAL(_restgpr_26)
+_GLOBAL(_rest32gpr_26)
+	lwz	26,-24(11)
+_GLOBAL(_restgpr_27)
+_GLOBAL(_rest32gpr_27)
+	lwz	27,-20(11)
+_GLOBAL(_restgpr_28)
+_GLOBAL(_rest32gpr_28)
+	lwz	28,-16(11)
+_GLOBAL(_restgpr_29)
+_GLOBAL(_rest32gpr_29)
+	lwz	29,-12(11)
+_GLOBAL(_restgpr_30)
+_GLOBAL(_rest32gpr_30)
+	lwz	30,-8(11)
+_GLOBAL(_restgpr_31)
+_GLOBAL(_rest32gpr_31)
+	lwz	31,-4(11)
+	blr
+
+/* Routines for restoring integer registers, called by the compiler.  */
+/* Called with r11 pointing to the stack header word of the caller of
the */
+/* function, just beyond the end of the integer restore area.  */
+
+_GLOBAL(_restgpr_14_x)
+_GLOBAL(_rest32gpr_14_x)
+	lwz	14,-72(11)	/* restore gp registers */
+_GLOBAL(_restgpr_15_x)
+_GLOBAL(_rest32gpr_15_x)
+	lwz	15,-68(11)
+_GLOBAL(_restgpr_16_x)
+_GLOBAL(_rest32gpr_16_x)
+	lwz	16,-64(11)
+_GLOBAL(_restgpr_17_x)
+_GLOBAL(_rest32gpr_17_x)
+	lwz	17,-60(11)
+_GLOBAL(_restgpr_18_x)
+_GLOBAL(_rest32gpr_18_x)
+	lwz	18,-56(11)
+_GLOBAL(_restgpr_19_x)
+_GLOBAL(_rest32gpr_19_x)
+	lwz	19,-52(11)
+_GLOBAL(_restgpr_20_x)
+_GLOBAL(_rest32gpr_20_x)
+	lwz	20,-48(11)
+_GLOBAL(_restgpr_21_x)
+_GLOBAL(_rest32gpr_21_x)
+	lwz	21,-44(11)
+_GLOBAL(_restgpr_22_x)
+_GLOBAL(_rest32gpr_22_x)
+	lwz	22,-40(11)
+_GLOBAL(_restgpr_23_x)
+_GLOBAL(_rest32gpr_23_x)
+	lwz	23,-36(11)
+_GLOBAL(_restgpr_24_x)
+_GLOBAL(_rest32gpr_24_x)
+	lwz	24,-32(11)
+_GLOBAL(_restgpr_25_x)
+_GLOBAL(_rest32gpr_25_x)
+	lwz	25,-28(11)
+_GLOBAL(_restgpr_26_x)
+_GLOBAL(_rest32gpr_26_x)
+	lwz	26,-24(11)
+_GLOBAL(_restgpr_27_x)
+_GLOBAL(_rest32gpr_27_x)
+	lwz	27,-20(11)
+_GLOBAL(_restgpr_28_x)
+_GLOBAL(_rest32gpr_28_x)
+	lwz	28,-16(11)
+_GLOBAL(_restgpr_29_x)
+_GLOBAL(_rest32gpr_29_x)
+	lwz	29,-12(11)
+_GLOBAL(_restgpr_30_x)
+_GLOBAL(_rest32gpr_30_x)
+	lwz	30,-8(11)
+_GLOBAL(_restgpr_31_x)
+_GLOBAL(_rest32gpr_31_x)
+	lwz	0,4(11)
+	lwz	31,-4(11)
+	mtlr	0
+	mr	1,11
+	blr
+
-- 
1.7.5.3



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Re: [PATCH 1/2] Re: barebox compilation with gcc 4.5.2 and ptxdist

[Andre Naujoks]

Sorry. line wrap was on in the first one.

From c479527616c5fc79c608e21573373a5a324f6e9b Mon Sep 17 00:00:00 2001
From: Andre Naujoks <nautsch2@googlemail.com>
Date: Wed, 27 Jul 2011 11:28:35 +0200
Subject: [PATCH 1/2] Ported crtsavres from linux kernel to barebox

---
 arch/ppc/lib/Makefile    |    1 +
 arch/ppc/lib/crtsavres.S |  239 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 240 insertions(+), 0 deletions(-)
 create mode 100644 arch/ppc/lib/crtsavres.S

diff --git a/arch/ppc/lib/Makefile b/arch/ppc/lib/Makefile
index 0844d56..c35fd08 100644
--- a/arch/ppc/lib/Makefile
+++ b/arch/ppc/lib/Makefile
@@ -10,4 +10,5 @@ obj-y += misc.o
 obj-$(CONFIG_CMD_BOOTM) += ppclinux.o
 obj-y += board_data.o
 obj-$(CONFIG_MODULES) += module.o
+obj-y += crtsavres.o
 
diff --git a/arch/ppc/lib/crtsavres.S b/arch/ppc/lib/crtsavres.S
new file mode 100644
index 0000000..f9d7cb6
--- /dev/null
+++ b/arch/ppc/lib/crtsavres.S
@@ -0,0 +1,239 @@
+/*
+ * Special support for eabi and SVR4
+ *
+ *   Copyright (C) 1995, 1996, 1998, 2000, 2001 Free Software Foundation, Inc.
+ *   Copyright 2008 Freescale Semiconductor, Inc.
+ *   Written By Michael Meissner
+ *
+ * Based on gcc/config/rs6000/crtsavres.asm from gcc
+ * 64 bit additions from reading the PPC elf64abi document.
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * In addition to the permissions in the GNU General Public License, the
+ * Free Software Foundation gives you unlimited permission to link the
+ * compiled version of this file with other programs, and to distribute
+ * those programs without any restriction coming from the use of this
+ * file.  (The General Public License restrictions do apply in other
+ * respects; for example, they cover modification of the file, and
+ * distribution when not linked into another program.)
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ *    As a special exception, if you link this library with files
+ *    compiled with GCC to produce an executable, this does not cause
+ *    the resulting executable to be covered by the GNU General Public License.
+ *    This exception does not however invalidate any other reasons why
+ *    the executable file might be covered by the GNU General Public License.
+ */
+
+#include <asm/ppc_asm.tmpl>
+
+#define N_FUN   36
+
+#define __stringify_1(x...)	#x
+#define __stringify(x...)	__stringify_1(x)
+
+#define _GLOBAL(n)	\
+	.text;		\
+	.stabs __stringify(n:F-1),N_FUN,0,0,n;\
+	.globl n;	\
+n:
+
+	.file	"crtsavres.S"
+	.section ".text"
+
+/* Routines for saving integer registers, called by the compiler.  */
+/* Called with r11 pointing to the stack header word of the caller of the */
+/* function, just beyond the end of the integer save area.  */
+
+_GLOBAL(_savegpr_14)
+_GLOBAL(_save32gpr_14)
+	stw	14,-72(11)	/* save gp registers */
+_GLOBAL(_savegpr_15)
+_GLOBAL(_save32gpr_15)
+	stw	15,-68(11)
+_GLOBAL(_savegpr_16)
+_GLOBAL(_save32gpr_16)
+	stw	16,-64(11)
+_GLOBAL(_savegpr_17)
+_GLOBAL(_save32gpr_17)
+	stw	17,-60(11)
+_GLOBAL(_savegpr_18)
+_GLOBAL(_save32gpr_18)
+	stw	18,-56(11)
+_GLOBAL(_savegpr_19)
+_GLOBAL(_save32gpr_19)
+	stw	19,-52(11)
+_GLOBAL(_savegpr_20)
+_GLOBAL(_save32gpr_20)
+	stw	20,-48(11)
+_GLOBAL(_savegpr_21)
+_GLOBAL(_save32gpr_21)
+	stw	21,-44(11)
+_GLOBAL(_savegpr_22)
+_GLOBAL(_save32gpr_22)
+	stw	22,-40(11)
+_GLOBAL(_savegpr_23)
+_GLOBAL(_save32gpr_23)
+	stw	23,-36(11)
+_GLOBAL(_savegpr_24)
+_GLOBAL(_save32gpr_24)
+	stw	24,-32(11)
+_GLOBAL(_savegpr_25)
+_GLOBAL(_save32gpr_25)
+	stw	25,-28(11)
+_GLOBAL(_savegpr_26)
+_GLOBAL(_save32gpr_26)
+	stw	26,-24(11)
+_GLOBAL(_savegpr_27)
+_GLOBAL(_save32gpr_27)
+	stw	27,-20(11)
+_GLOBAL(_savegpr_28)
+_GLOBAL(_save32gpr_28)
+	stw	28,-16(11)
+_GLOBAL(_savegpr_29)
+_GLOBAL(_save32gpr_29)
+	stw	29,-12(11)
+_GLOBAL(_savegpr_30)
+_GLOBAL(_save32gpr_30)
+	stw	30,-8(11)
+_GLOBAL(_savegpr_31)
+_GLOBAL(_save32gpr_31)
+	stw	31,-4(11)
+	blr
+
+/* Routines for restoring integer registers, called by the compiler.  */
+/* Called with r11 pointing to the stack header word of the caller of the */
+/* function, just beyond the end of the integer restore area.  */
+
+_GLOBAL(_restgpr_14)
+_GLOBAL(_rest32gpr_14)
+	lwz	14,-72(11)	/* restore gp registers */
+_GLOBAL(_restgpr_15)
+_GLOBAL(_rest32gpr_15)
+	lwz	15,-68(11)
+_GLOBAL(_restgpr_16)
+_GLOBAL(_rest32gpr_16)
+	lwz	16,-64(11)
+_GLOBAL(_restgpr_17)
+_GLOBAL(_rest32gpr_17)
+	lwz	17,-60(11)
+_GLOBAL(_restgpr_18)
+_GLOBAL(_rest32gpr_18)
+	lwz	18,-56(11)
+_GLOBAL(_restgpr_19)
+_GLOBAL(_rest32gpr_19)
+	lwz	19,-52(11)
+_GLOBAL(_restgpr_20)
+_GLOBAL(_rest32gpr_20)
+	lwz	20,-48(11)
+_GLOBAL(_restgpr_21)
+_GLOBAL(_rest32gpr_21)
+	lwz	21,-44(11)
+_GLOBAL(_restgpr_22)
+_GLOBAL(_rest32gpr_22)
+	lwz	22,-40(11)
+_GLOBAL(_restgpr_23)
+_GLOBAL(_rest32gpr_23)
+	lwz	23,-36(11)
+_GLOBAL(_restgpr_24)
+_GLOBAL(_rest32gpr_24)
+	lwz	24,-32(11)
+_GLOBAL(_restgpr_25)
+_GLOBAL(_rest32gpr_25)
+	lwz	25,-28(11)
+_GLOBAL(_restgpr_26)
+_GLOBAL(_rest32gpr_26)
+	lwz	26,-24(11)
+_GLOBAL(_restgpr_27)
+_GLOBAL(_rest32gpr_27)
+	lwz	27,-20(11)
+_GLOBAL(_restgpr_28)
+_GLOBAL(_rest32gpr_28)
+	lwz	28,-16(11)
+_GLOBAL(_restgpr_29)
+_GLOBAL(_rest32gpr_29)
+	lwz	29,-12(11)
+_GLOBAL(_restgpr_30)
+_GLOBAL(_rest32gpr_30)
+	lwz	30,-8(11)
+_GLOBAL(_restgpr_31)
+_GLOBAL(_rest32gpr_31)
+	lwz	31,-4(11)
+	blr
+
+/* Routines for restoring integer registers, called by the compiler.  */
+/* Called with r11 pointing to the stack header word of the caller of the */
+/* function, just beyond the end of the integer restore area.  */
+
+_GLOBAL(_restgpr_14_x)
+_GLOBAL(_rest32gpr_14_x)
+	lwz	14,-72(11)	/* restore gp registers */
+_GLOBAL(_restgpr_15_x)
+_GLOBAL(_rest32gpr_15_x)
+	lwz	15,-68(11)
+_GLOBAL(_restgpr_16_x)
+_GLOBAL(_rest32gpr_16_x)
+	lwz	16,-64(11)
+_GLOBAL(_restgpr_17_x)
+_GLOBAL(_rest32gpr_17_x)
+	lwz	17,-60(11)
+_GLOBAL(_restgpr_18_x)
+_GLOBAL(_rest32gpr_18_x)
+	lwz	18,-56(11)
+_GLOBAL(_restgpr_19_x)
+_GLOBAL(_rest32gpr_19_x)
+	lwz	19,-52(11)
+_GLOBAL(_restgpr_20_x)
+_GLOBAL(_rest32gpr_20_x)
+	lwz	20,-48(11)
+_GLOBAL(_restgpr_21_x)
+_GLOBAL(_rest32gpr_21_x)
+	lwz	21,-44(11)
+_GLOBAL(_restgpr_22_x)
+_GLOBAL(_rest32gpr_22_x)
+	lwz	22,-40(11)
+_GLOBAL(_restgpr_23_x)
+_GLOBAL(_rest32gpr_23_x)
+	lwz	23,-36(11)
+_GLOBAL(_restgpr_24_x)
+_GLOBAL(_rest32gpr_24_x)
+	lwz	24,-32(11)
+_GLOBAL(_restgpr_25_x)
+_GLOBAL(_rest32gpr_25_x)
+	lwz	25,-28(11)
+_GLOBAL(_restgpr_26_x)
+_GLOBAL(_rest32gpr_26_x)
+	lwz	26,-24(11)
+_GLOBAL(_restgpr_27_x)
+_GLOBAL(_rest32gpr_27_x)
+	lwz	27,-20(11)
+_GLOBAL(_restgpr_28_x)
+_GLOBAL(_rest32gpr_28_x)
+	lwz	28,-16(11)
+_GLOBAL(_restgpr_29_x)
+_GLOBAL(_rest32gpr_29_x)
+	lwz	29,-12(11)
+_GLOBAL(_restgpr_30_x)
+_GLOBAL(_rest32gpr_30_x)
+	lwz	30,-8(11)
+_GLOBAL(_restgpr_31_x)
+_GLOBAL(_rest32gpr_31_x)
+	lwz	0,4(11)
+	lwz	31,-4(11)
+	mtlr	0
+	mr	1,11
+	blr
+
-- 
1.7.5.3



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[PATCH 2/2] Re: barebox compilation with gcc 4.5.2 and ptxdist

[Andre Naujoks]

From 9b3985045da1161a934cba48749fe1759e62dae6 Mon Sep 17 00:00:00 2001
From: Andre Naujoks <nautsch2@googlemail.com>
Date: Wed, 27 Jul 2011 11:29:43 +0200
Subject: [PATCH 2/2] Ported ppc ashrdi3 from linux kernel

---
 arch/ppc/lib/misc.S |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/arch/ppc/lib/misc.S b/arch/ppc/lib/misc.S
index 24f901f..bd06ff2 100644
--- a/arch/ppc/lib/misc.S
+++ b/arch/ppc/lib/misc.S
@@ -2,6 +2,20 @@
 #include <asm/ppc_asm.tmpl>
 #include <asm-generic/errno.h>
 
+	.globl	__ashrdi3
+__ashrdi3:
+	subfic	r6,r5,32
+	srw	r4,r4,r5	# LSW = count > 31 ? 0 : LSW >> count
+	addi	r7,r5,32	# could be xori, or addi with -32
+	slw	r6,r3,r6	# t1 = count > 31 ? 0 : MSW << (32-count)
+	rlwinm	r8,r7,0,32	# t3 = (count < 32) ? 32 : 0
+	sraw	r7,r3,r7	# t2 = MSW >> (count-32)
+	or	r4,r4,r6	# LSW |= t1
+	slw	r7,r7,r8	# t2 = (count < 32) ? 0 : t2
+	sraw	r3,r3,r5	# MSW = MSW >> count
+	or	r4,r4,r7	# LSW |= t2
+	blr
+
 	.globl	__ashldi3
 __ashldi3:
 	subfic	r6,r5,32
-- 
1.7.5.3



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Re: barebox compilation with gcc 4.5.2 and ptxdist

[Sascha Hauer]

On Wed, Jul 27, 2011 at 11:50:12AM +0200, Andre Naujoks wrote:
> Am 27.07.2011 08:40, schrieb Andre Naujoks:
> > Am 26.07.2011 16:20, schrieb Marc Kleine-Budde:
> >> On 07/26/2011 03:56 PM, Andre Naujoks wrote:
> >>> Hello.
> >>>
> >>> We are currently trying to compile a barebox with the git version of
> >>> ptxdist and the git version of the OSELAS generic Toolchain for powerpc.
> >>>
> >>> Also the current 2011.07.0 release of barebox.
> >>>
> >>> We are having some problems during the build, which I think are a result
> >>> of some changes in gcc's optimizations (since 4.4.something). GCC uses
> >>> some functions on the ppc platform to optimze the size of the resulting
> >>> binary, which are only present in the libgcc.a.
> >>>
> >>> The compile stage works fine up tp the last linker step:
> >>>
> >>>   CC      arch/ppc/lib/time.o
> >>>   AS      arch/ppc/lib/misc.o
> >>>   CC      arch/ppc/lib/ppclinux.o
> >>>   CC      arch/ppc/lib/board_data.o
> >>>   LD      arch/ppc/lib/built-in.o
> >>>   LD      barebox
> >>> common/built-in.o: In function `mapset':
> >>> hush.c:(.text.mapset+0x44): undefined reference to `_restgpr_30_x'
> >>> common/built-in.o: In function `syntax_err':
> >>> hush.c:(.text.syntax_err+0x34): undefined reference to `_restgpr_30_x'
> >>> common/built-in.o: In function `done_command':
> >>> hush.c:(.text.done_command+0x94): undefined reference to `_restgpr_29_x'
> >>> common/built-in.o: In function `done_pipe':
> >>> hush.c:(.text.done_pipe+0x5c): undefined reference to `_restgpr_29_x'
> >>> common/built-in.o: In function `is_assignment':
> >>> hush.c:(.text.is_assignment+0x8c): undefined reference to `_restgpr_27_x'
> >>> common/built-in.o: In function `b_addchr':
> >>> hush.c:(.text.b_addchr+0x8c): undefined reference to `_restgpr_28_x'
> >>> common/built-in.o: In function `b_addqchr':
> >>> hush.c:(.text.b_addqchr+0x78): undefined reference to `_restgpr_29_x'
> >>> ...
> >>>
> >>>
> >>> This goes on for a few pages.
> >>>
> >>> As far as I can see, the possibilities I have here, is to either
> >>> integrate the missing functions out of the gcc sources into barebox, or
> >>> make barebox link with libgcc, which seems surprisingly difficult, due
> >>> to the unfamiliar (to me) build process. A simple LDFLAGS_barebox+=-l..
> >>> -L.. did not help here.
> >>>
> >>> Am I right with this assumption, or am I missing something else here?
> >>
> >> We don't want to link barebox against libgcc, that's bad style. I
> >> suggest to port arch/powerpc/lib/crtsavres.S from the linux kernel to
> >> barebox.
> > 
> > Thanks. I will give this a shot and see how far I get. If it works I
> > will come back with a patch.
> 
> Hi.
> 
> With a little help from a collegue, we came up with the patches in the
> followong mails. Basically the kernel files without the 64 bit parts.
> 
> The second patch was another part of libgcc, which seemed to fit best in
> the misc.S file, which was already present.

Applied to -master.

Thanks
 Sascha

-- 
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Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: barebox compilation with gcc 4.5.2 and ptxdist

[Andre Naujoks]

Am 28.07.2011 13:52, schrieb Sascha Hauer:
> On Wed, Jul 27, 2011 at 11:50:12AM +0200, Andre Naujoks wrote:
>> Am 27.07.2011 08:40, schrieb Andre Naujoks:
>>> Am 26.07.2011 16:20, schrieb Marc Kleine-Budde:
>>>> On 07/26/2011 03:56 PM, Andre Naujoks wrote:
>>>>> Hello.
>>>>>
>>>>> We are currently trying to compile a barebox with the git version of
>>>>> ptxdist and the git version of the OSELAS generic Toolchain for powerpc.
>>>>>
>>>>> Also the current 2011.07.0 release of barebox.
>>>>>
>>>>> We are having some problems during the build, which I think are a result
>>>>> of some changes in gcc's optimizations (since 4.4.something). GCC uses
>>>>> some functions on the ppc platform to optimze the size of the resulting
>>>>> binary, which are only present in the libgcc.a.
>>>>>
>>>>> The compile stage works fine up tp the last linker step:
>>>>>
>>>>>   CC      arch/ppc/lib/time.o
>>>>>   AS      arch/ppc/lib/misc.o
>>>>>   CC      arch/ppc/lib/ppclinux.o
>>>>>   CC      arch/ppc/lib/board_data.o
>>>>>   LD      arch/ppc/lib/built-in.o
>>>>>   LD      barebox
>>>>> common/built-in.o: In function `mapset':
>>>>> hush.c:(.text.mapset+0x44): undefined reference to `_restgpr_30_x'
>>>>> common/built-in.o: In function `syntax_err':
>>>>> hush.c:(.text.syntax_err+0x34): undefined reference to `_restgpr_30_x'
>>>>> common/built-in.o: In function `done_command':
>>>>> hush.c:(.text.done_command+0x94): undefined reference to `_restgpr_29_x'
>>>>> common/built-in.o: In function `done_pipe':
>>>>> hush.c:(.text.done_pipe+0x5c): undefined reference to `_restgpr_29_x'
>>>>> common/built-in.o: In function `is_assignment':
>>>>> hush.c:(.text.is_assignment+0x8c): undefined reference to `_restgpr_27_x'
>>>>> common/built-in.o: In function `b_addchr':
>>>>> hush.c:(.text.b_addchr+0x8c): undefined reference to `_restgpr_28_x'
>>>>> common/built-in.o: In function `b_addqchr':
>>>>> hush.c:(.text.b_addqchr+0x78): undefined reference to `_restgpr_29_x'
>>>>> ...
>>>>>
>>>>>
>>>>> This goes on for a few pages.
>>>>>
>>>>> As far as I can see, the possibilities I have here, is to either
>>>>> integrate the missing functions out of the gcc sources into barebox, or
>>>>> make barebox link with libgcc, which seems surprisingly difficult, due
>>>>> to the unfamiliar (to me) build process. A simple LDFLAGS_barebox+=-l..
>>>>> -L.. did not help here.
>>>>>
>>>>> Am I right with this assumption, or am I missing something else here?
>>>>
>>>> We don't want to link barebox against libgcc, that's bad style. I
>>>> suggest to port arch/powerpc/lib/crtsavres.S from the linux kernel to
>>>> barebox.
>>>
>>> Thanks. I will give this a shot and see how far I get. If it works I
>>> will come back with a patch.
>>
>> Hi.
>>
>> With a little help from a collegue, we came up with the patches in the
>> followong mails. Basically the kernel files without the 64 bit parts.
>>
>> The second patch was another part of libgcc, which seemed to fit best in
>> the misc.S file, which was already present.
> 
> Applied to -master.

Thats great. Thanks!

Andre

> 
> Thanks
>  Sascha
> 


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