"arm: keep all sections in ELF file" breaks Arndale

U-Boot Andre Przywara 5 participants 10 messages Dec 17, 2013 – Jan 29, 2014

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Andre Przywara

author

2013-12-17 15:24 UTC #0 lore raw

Hi,

the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.

I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7

Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100

arm: keep all sections in ELF file

That patch looks like Chinese to me, does one of you have an idea what's wrong here?
Are we missing a section, maybe for the SPL build?

Regards,
Andre.

Tom Rini

2013-12-17 15:30 UTC #1 lore raw

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Quoted 8 lines · Andre Przywara

Hi,
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7

Quoted 8 lines

Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
arm: keep all sections in ELF file
That patch looks like Chinese to me, does one of you have an idea what's wrong here?
Are we missing a section, maybe for the SPL build?

So on Arndale, what file do you boot exactly? It sounds like not u-boot.img but some tool stripping / modifying u-boot (or spl/u-boot-spl) and having relied on certain sections being stripped out before being run.

- --
Tom
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Andre Przywara

2013-12-17 15:47 UTC #2 lore raw

(CCing Inderpal, Chander and Minkyu)

Quoted 17 lines · Tom Rini

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Quoted 13 lines · Andre Przywara
Hi,
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
arm: keep all sections in ELF file

Quoted 8 lines

Quoted 3 lines
That patch looks like Chinese to me, does one of you have an idea what's wrong here?
Are we missing a section, maybe for the SPL build?
So on Arndale, what file do you boot exactly? It sounds like not u-boot.img but some tool stripping / modifying u-boot (or spl/u-boot-spl) and having relied on certain sections being stripped out before being run.

Good point. Indeed I boot u-boot-dtb.bin (the SPL is spl/arndale-spl.bin). So the Makefile does:
cat u-boot.bin u-boot.dtb >u-boot-dtb.bin

I guess the address under which U-boot expects to find the attached dtb changes due to the non-discarding.

Does any of the Arndale people have an idea how to fix this?

Regards,
Andre.

Quoted 22 lines

- --
Tom
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Tom Rini

2013-12-17 15:57 UTC #3 lore raw

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Quoted 17 lines · Andre Przywara

(CCing Inderpal, Chander and Minkyu)
On 12/17/2013 04:30 PM, Tom Rini wrote:
Quoted 13 lines · Andre Przywara
Quoted 13 lines
Quoted 13 lines
Hi,
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
arm: keep all sections in ELF file

Quoted 17 lines

Quoted 3 lines
Quoted 3 lines
Quoted 3 lines
That patch looks like Chinese to me, does one of you have an idea what's wrong here?
Are we missing a section, maybe for the SPL build?
So on Arndale, what file do you boot exactly? It sounds like not u-boot.img but some tool stripping / modifying u-boot (or spl/u-boot-spl) and having relied on certain sections being stripped out before being run.
Quoted 8 lines
Good point. Indeed I boot u-boot-dtb.bin (the SPL is spl/arndale-spl.bin). So the Makefile does:
cat u-boot.bin u-boot.dtb >u-boot-dtb.bin
I guess the address under which U-boot expects to find the attached dtb changes due to the non-discarding.
Does any of the Arndale people have an idea how to fix this?

That's a little confusing as we use objcopy -O binary to make u-boot.bin/u-boot-spl.bin and that would, I would think, drop these sections anyhow. But some checking of binary size with the patch in question locally reverted would help shed some light here.

- --
Tom
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Andre Przywara

author

2013-12-18 14:06 UTC #4 lore raw

Quoted 37 lines · Tom Rini

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Quoted 33 lines · Andre Przywara
(CCing Inderpal, Chander and Minkyu)
On 12/17/2013 04:30 PM, Tom Rini wrote:
Quoted 11 lines · Andre Przywara
Quoted 11 lines
Quoted 11 lines
Hi,
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
Quoted 5 lines
Quoted 5 lines
Quoted 5 lines
arm: keep all sections in ELF file
That patch looks like Chinese to me, does one of you have an idea what's wrong here?
Are we missing a section, maybe for the SPL build?
So on Arndale, what file do you boot exactly? It sounds like not u-boot.img but some tool stripping / modifying u-boot (or spl/u-boot-spl) and having relied on certain sections being stripped out before being run.
Quoted 6 lines
Good point. Indeed I boot u-boot-dtb.bin (the SPL is spl/arndale-spl.bin). So the Makefile does:
cat u-boot.bin u-boot.dtb >u-boot-dtb.bin
I guess the address under which U-boot expects to find the attached dtb changes due to the non-discarding.

Quoted 6 lines

Quoted 1 line
Quoted 1 line
Does any of the Arndale people have an idea how to fix this?
That's a little confusing as we use objcopy -O binary to make u-boot.bin/u-boot-spl.bin and that would, I would think, drop these sections anyhow. But some checking of binary size with the patch in question locally reverted would help shed some light here.

So I did objdump -h on ./u-boot, the diff (sorted by the section name, as the order of the section differed, and the size) is:

.ARM.attributes 0000002d
-.bss 00048b10
+.bss 00048b08

  .bss_end        00000000
  .bss_start      00000000
  .comment        0000001c
@@ -14,8 +14,12 @@
  .debug_loc      00045a4e
  .debug_ranges   00006f70
  .debug_str      000123b4
+.dynamic        00000080
+.dynstr         0000001d
+.dynsym         00000060
  .got.plt        0000000c
  .hash           0000002c
+.interp         00000011
  .rel.dyn        00006fd8
  .rodata         0000ae47
  .text           0002cdf0

- works, + is broken.
+ is HEAD as of yesterday, - is the same with the patch in question reverted. So the patch _adds_ some sections to the file. u-boot-spl is exactly the same, for u-boot-spl.bin the broken version ends earlier (but until then is identical). arndale-spl.bin (which I flash) is different, though.
Arndale uses CONFIG_OF_SEPARATE, and .text stays the same AFAICS.

I can do some more debugging tomorrow, am grateful for any hints.

Regards,
Andre.

Albert ARIBAUD

2013-12-21 10:46 UTC #5 lore raw

Hi Andre,

Quoted 76 lines · Andre Przywara

Quoted 37 lines · Tom Rini
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Quoted 33 lines · Andre Przywara
(CCing Inderpal, Chander and Minkyu)
On 12/17/2013 04:30 PM, Tom Rini wrote:
Quoted 11 lines · Andre Przywara
Quoted 11 lines
Quoted 11 lines
Hi,
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
Quoted 5 lines
Quoted 5 lines
Quoted 5 lines
arm: keep all sections in ELF file
That patch looks like Chinese to me, does one of you have an idea what's wrong here?
Are we missing a section, maybe for the SPL build?
So on Arndale, what file do you boot exactly? It sounds like not u-boot.img but some tool stripping / modifying u-boot (or spl/u-boot-spl) and having relied on certain sections being stripped out before being run.
Quoted 6 lines
Good point. Indeed I boot u-boot-dtb.bin (the SPL is spl/arndale-spl.bin). So the Makefile does:
cat u-boot.bin u-boot.dtb >u-boot-dtb.bin
I guess the address under which U-boot expects to find the attached dtb changes due to the non-discarding.
Quoted 6 lines
Quoted 1 line
Quoted 1 line
Does any of the Arndale people have an idea how to fix this?
That's a little confusing as we use objcopy -O binary to make u-boot.bin/u-boot-spl.bin and that would, I would think, drop these sections anyhow. But some checking of binary size with the patch in question locally reverted would help shed some light here.
So I did objdump -h on ./u-boot, the diff (sorted by the section name, as the order of the section differed, and the size) is:
.ARM.attributes 0000002d
-.bss 00048b10
+.bss 00048b08
  .bss_end        00000000
  .bss_start      00000000
  .comment        0000001c
(quoted diff) +5 -1
@@ -14,8 +14,12 @@
  .debug_loc      00045a4e
  .debug_ranges   00006f70
  .debug_str      000123b4
+.dynamic        00000080
+.dynstr         0000001d
+.dynsym         00000060
  .got.plt        0000000c
  .hash           0000002c
+.interp         00000011
  .rel.dyn        00006fd8
  .rodata         0000ae47
  .text           0002cdf0
 
- works, + is broken.
+ is HEAD as of yesterday, - is the same with the patch in question 
reverted. So the patch _adds_ some sections to the file. u-boot-spl is exactly the same, for u-boot-spl.bin the broken version ends earlier (but until then is identical). arndale-spl.bin (which I flash) is different, though.
Arndale uses CONFIG_OF_SEPARATE, and .text stays the same AFAICS.

Quoted 1 line

I can do some more debugging tomorrow, am grateful for any hints.

Sorry for chiming in late. Did you try this?

http://patchwork.ozlabs.org/patch/300928/

Amicalement,

Signature · 1 line

Albert.

Andre Przywara

author

2013-12-21 20:57 UTC #6 lore raw

Quoted 81 lines · Albert ARIBAUD

Hi Andre,
Quoted 76 lines · Andre Przywara
Quoted 37 lines · Tom Rini
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Quoted 33 lines · Andre Przywara
(CCing Inderpal, Chander and Minkyu)
On 12/17/2013 04:30 PM, Tom Rini wrote:
Quoted 11 lines · Andre Przywara
Quoted 11 lines
Quoted 11 lines
Hi,
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
Quoted 5 lines
Quoted 5 lines
Quoted 5 lines
arm: keep all sections in ELF file
That patch looks like Chinese to me, does one of you have an idea what's wrong here?
Are we missing a section, maybe for the SPL build?
So on Arndale, what file do you boot exactly? It sounds like not u-boot.img but some tool stripping / modifying u-boot (or spl/u-boot-spl) and having relied on certain sections being stripped out before being run.
Quoted 6 lines
Good point. Indeed I boot u-boot-dtb.bin (the SPL is spl/arndale-spl.bin). So the Makefile does:
cat u-boot.bin u-boot.dtb >u-boot-dtb.bin
I guess the address under which U-boot expects to find the attached dtb changes due to the non-discarding.
Quoted 6 lines
Quoted 1 line
Quoted 1 line
Does any of the Arndale people have an idea how to fix this?
That's a little confusing as we use objcopy -O binary to make u-boot.bin/u-boot-spl.bin and that would, I would think, drop these sections anyhow. But some checking of binary size with the patch in question locally reverted would help shed some light here.
So I did objdump -h on ./u-boot, the diff (sorted by the section name, as the order of the section differed, and the size) is:
   .ARM.attributes 0000002d
-.bss            00048b10
+.bss            00048b08
   .bss_end        00000000
   .bss_start      00000000
   .comment        0000001c
(quoted diff) +5 -1
@@ -14,8 +14,12 @@
   .debug_loc      00045a4e
   .debug_ranges   00006f70
   .debug_str      000123b4
+.dynamic        00000080
+.dynstr         0000001d
+.dynsym         00000060
   .got.plt        0000000c
   .hash           0000002c
+.interp         00000011
   .rel.dyn        00006fd8
   .rodata         0000ae47
   .text           0002cdf0
 
- works, + is broken.
+ is HEAD as of yesterday, - is the same with the patch in question
reverted. So the patch _adds_ some sections to the file. u-boot-spl is exactly the same, for u-boot-spl.bin the broken version ends earlier (but until then is identical). arndale-spl.bin (which I flash) is different, though.
Arndale uses CONFIG_OF_SEPARATE, and .text stays the same AFAICS.

Quoted 5 lines

Quoted 1 line
I can do some more debugging tomorrow, am grateful for any hints.
Sorry for chiming in late. Did you try this?
http://patchwork.ozlabs.org/patch/300928/

I cannot reach the server. Can you give me a hint what this patch is about (or a Subject: line to search for on the ML?)

Thanks,
Andre.

Andre Przywara

author

2013-12-21 23:25 UTC #7 lore raw

Quoted 85 lines · Andre Przywara

Quoted 84 lines · Albert ARIBAUD
Hi Andre,
Quoted 79 lines · Andre Przywara
Quoted 40 lines · Tom Rini
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Quoted 36 lines · Andre Przywara
(CCing Inderpal, Chander and Minkyu)
On 12/17/2013 04:30 PM, Tom Rini wrote:
Quoted 11 lines · Andre Przywara
Quoted 11 lines
Quoted 11 lines
Hi,
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
Quoted 6 lines
Quoted 6 lines
Quoted 6 lines
arm: keep all sections in ELF file
That patch looks like Chinese to me, does one of you have an idea what's
wrong here?
Are we missing a section, maybe for the SPL build?
So on Arndale, what file do you boot exactly? It sounds like not u-boot.img but some tool stripping / modifying u-boot (or spl/u-boot-spl) and having relied on certain sections being stripped out
before being run.
Quoted 7 lines
Good point. Indeed I boot u-boot-dtb.bin (the SPL is spl/arndale-spl.bin). So the Makefile does:
cat u-boot.bin u-boot.dtb >u-boot-dtb.bin
I guess the address under which U-boot expects to find the attached dtb
changes due to the non-discarding.
Quoted 6 lines
Quoted 1 line
Quoted 1 line
Does any of the Arndale people have an idea how to fix this?
That's a little confusing as we use objcopy -O binary to make u-boot.bin/u-boot-spl.bin and that would, I would think, drop these sections anyhow. But some checking of binary size with the patch in question locally reverted would help shed some light here.
So I did objdump -h on ./u-boot, the diff (sorted by the section name, as the order of the section differed, and the size) is:
   .ARM.attributes 0000002d
-.bss            00048b10
+.bss            00048b08
   .bss_end        00000000
   .bss_start      00000000
   .comment        0000001c
(quoted diff) +5 -1
@@ -14,8 +14,12 @@
   .debug_loc      00045a4e
   .debug_ranges   00006f70
   .debug_str      000123b4
+.dynamic        00000080
+.dynstr         0000001d
+.dynsym         00000060
   .got.plt        0000000c
   .hash           0000002c
+.interp         00000011
   .rel.dyn        00006fd8
   .rodata         0000ae47
   .text           0002cdf0
 
- works, + is broken.
+ is HEAD as of yesterday, - is the same with the patch in question
reverted. So the patch _adds_ some sections to the file. u-boot-spl is exactly the same, for u-boot-spl.bin the broken version ends earlier (but until then is identical). arndale-spl.bin (which I flash) is different, though.
Arndale uses CONFIG_OF_SEPARATE, and .text stays the same AFAICS.

Quoted 8 lines

Quoted 5 lines
Quoted 1 line
I can do some more debugging tomorrow, am grateful for any hints.
Sorry for chiming in late. Did you try this?
http://patchwork.ozlabs.org/patch/300928/
I cannot reach the server. Can you give me a hint what this patch is about (or a Subject: line to search for on the ML?)

OK, now the server works again. Looks like this could fix it on the first glance, but I momentarily cannot test this. Will try to do this ASAP.

Thanks,
Andr?.

Andre Przywara

author

2014-01-07 14:04 UTC #9 lore raw

In reply to Albert ARIBAUD

Quoted 16 lines · Albert ARIBAUD

Hi Andre,
Quoted 11 lines · Andre Przywara
Quoted 11 lines
Quoted 11 lines
Quoted 11 lines
Quoted 11 lines
Quoted 11 lines
the Arndale board does not work anymore with current master HEAD. If I turn on the board, I see exactly nothing.
I bisected it down to:
47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
Author: Albert ARIBAUD <[email protected]>
Date:   Thu Nov 7 14:21:46 2013 +0100
arm: keep all sections in ELF file

....

Albert,

Quoted 4 lines

Sorry for chiming in late. Did you try this?
http://patchwork.ozlabs.org/patch/300928/

OK, got around to test this now, it indeed fixes the issue for me. In this original thread of yours you mentioned a v2, has this been sent out yet?
Please make sure to push this patch into the release, otherwise we will have a regression with Arndale (and others).

Thanks,
Andre.

Michal Simek

2014-01-29 15:37 UTC #8 lore raw

[U-Boot] "arm: keep all sections in ELF file" breaks Zynq

In reply to Andre Przywara

Hi,

I have also problem with this patch but from the other side. Tool for booting image generation expects that LOAD section is the first.
That's why I have to remove PHDR, INTERP sections. Not sure about DYNAMIC section which is also there but behind LOAD section.

I can easily create zynq private linker script but maybe there is better way how to remove these section for us via LDFLAGS_FINAL in config.mk.
Unfortunatelly I haven't found how to do it.

Can someone know if it is possible to remove some sections via ld command line?

Thanks,
Michal

Signature · 14 lines

Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform


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