[Buildroot] [PATCH v3] at91bootstrap: fix gcc-4.6.x overlap linker issue

[Buildroot] [PATCH v3] at91bootstrap: fix gcc-4.6.x overlap linker issue

[Grégory Hermant]

Things always happen in threes...
This patch fixes an issue detected in the linking stage of the at91bootstraploader from gcc-4.6.x release.
Indeed from this gcc release the linking stage fails due to an overlap between text.startup and data section.
To fix this issue we need to modify the linker script in order to add the text.startup input section into the text output section.


Signed-off-by: Gregory Hermant <gregory.hermant@calao-systems.com>
---
 ...at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch |   26 ++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 boot/at91bootstrap/at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch

diff --git a/boot/at91bootstrap/at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch b/boot/at91bootstrap/at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch
new file mode 100644
index 0000000..4222b6c
--- /dev/null
+++ b/boot/at91bootstrap/at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch
@@ -0,0 +1,26 @@
+From 1a26120767aed8a2660fe840955d5d66d3469ce2 Mon Sep 17 00:00:00 2001
+From: Gregory Hermant <gregory.hermant@calao-systems.com>
+Date: Wed, 10 Oct 2012 08:45:46 +0200
+Subject: [PATCH] at91bootstrap: fix overlap linker issue
+
+
+Signed-off-by: Gregory Hermant <gregory.hermant@calao-systems.com>
+---
+ elf32-littlearm.lds |    1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/elf32-littlearm.lds b/elf32-littlearm.lds
+index a33952f..4f3ba25 100644
+--- a/elf32-littlearm.lds
++++ b/elf32-littlearm.lds
+@@ -7,6 +7,7 @@ SECTIONS
+ 	.text : { + 		_stext = .;
+ 		*(.text)
++		*(.text*)
+ 		*(.rodata)                 /* read-only data (constants) */
+ 		*(.rodata*)
+ 		. = ALIGN(4);
+-- +1.7.9.5
+
-- 
1.7.9.5

[Buildroot] [PATCH v3] at91bootstrap: fix gcc-4.6.x overlap linker issue

[Thomas Petazzoni]

Gr?gory,

On Wed, 10 Oct 2012 10:27:18 +0200, Gr?gory Hermant wrote:
> Things always happen in threes...
> This patch fixes an issue detected in the linking stage of the at91bootstraploader from gcc-4.6.x release.
> Indeed from this gcc release the linking stage fails due to an overlap between text.startup and data section.
> To fix this issue we need to modify the linker script in order to add the text.startup input section into the text output section.
> 
> 
> Signed-off-by: Gregory Hermant <gregory.hermant@calao-systems.com>
> ---
>  ...at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch |   26 ++++++++++++++++++++
>  1 file changed, 26 insertions(+)
>  create mode 100644 boot/at91bootstrap/at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch

Unfortunately, it still cannot be applied as is:

 *) All the text before the --- separator goes into the commit log (so
 it remains forever in the Buildroot commit history). Therefore, it
 shouldn't contain "personal" comments such as "Things always happen in
 threes"

 *) The commit log text should be wrapped at ~80 columns

In addition to that, most of the commit log text would benefit from
being copy/pasted into the description of the
at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch patch.

Of course, Peter can probably fix those minor problems while
committing, but I thought it would be useful to describe what's still
not perfect with your patch.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] [PATCH v3] at91bootstrap: fix gcc-4.6.x overlap linker issue

[Grégory Hermant]

Hi thomas,
Thanks very much for your feedback.
gregory

Le 10/10/2012 13:19, Thomas Petazzoni a ?crit :
> Gr?gory,
> 
> On Wed, 10 Oct 2012 10:27:18 +0200, Gr?gory Hermant wrote:
>> Things always happen in threes...
>> This patch fixes an issue detected in the linking stage of the at91bootstraploader from gcc-4.6.x release.
>> Indeed from this gcc release the linking stage fails due to an overlap between text.startup and data section.
>> To fix this issue we need to modify the linker script in order to add the text.startup input section into the text output section.
>>
>>
>> Signed-off-by: Gregory Hermant <gregory.hermant@calao-systems.com>
>> ---
>>  ...at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch |   26 ++++++++++++++++++++
>>  1 file changed, 26 insertions(+)
>>  create mode 100644 boot/at91bootstrap/at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch
> 
> Unfortunately, it still cannot be applied as is:
> 
>  *) All the text before the --- separator goes into the commit log (so
>  it remains forever in the Buildroot commit history). Therefore, it
>  shouldn't contain "personal" comments such as "Things always happen in
>  threes"
> 
>  *) The commit log text should be wrapped at ~80 columns
> 
> In addition to that, most of the commit log text would benefit from
> being copy/pasted into the description of the
> at91bootstrap-1.16-gcc-4.6.x-ldscript-fix.patch patch.
> 
> Of course, Peter can probably fix those minor problems while
> committing, but I thought it would be useful to describe what's still
> not perfect with your patch.
> 
> Best regards,
> 
> Thomas
>