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Message-ID: <871slk3b2k.fsf@free-electrons.com>
Date: Mon, 30 Oct 2017 16:33:07 +0100
From: Gregory CLEMENT <gregory.clement@...e-electrons.com>
To: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: Arnd Bergmann <arnd@...db.de>,
Aaro Koskinen <aaro.koskinen@....fi>,
Petr Cvek <petrcvekcz@...il.com>,
LKML <linux-kernel@...r.kernel.org>,
Russell King - ARM Linux <linux@...linux.org.uk>,
Andrea Adami <andrea.adami@...il.com>,
Romain Izard <romain.izard.pro@...il.com>,
Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>,
Robert Jarzmik <robert.jarzmik@...e.fr>,
"linux-arm-kernel\@lists.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: add a private asm/unaligned.h
Hi Ard,
On lun., oct. 30 2017, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
> On 30 October 2017 at 15:09, Gregory CLEMENT
> <gregory.clement@...e-electrons.com> wrote:
>> Hi Ard,
>>
>> On lun., oct. 30 2017, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
>>
>>> On 30 October 2017 at 15:05, Gregory CLEMENT
>>> <gregory.clement@...e-electrons.com> wrote:
>>>> Hi Ard,
>>>>
>>>> On lun., oct. 30 2017, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
>>>>
>>> ...
>>>>>
>>>>> Could you please share the output of 'readelf -S' for those vmlinux
>>>>> decompressor images?
>>>>
>>>> Here it is:
>>>>
>>>> In the meantime I also used an arm-linux-gnueabihf- in case it could be
>>>> related to the toolchain, I had te same issue and here it is the readelf
>>>> output:
>>>> arm-linux-gnueabi-readelf -S ../build/vmlinux
>>>
>>> Actually, I meant the 'vmlinux' file in arch/arm/boot/compressed, not
>>> the main one.
>>
>> Here it is then:
>>
>> arm-linux-gnueabi-readelf -S ../build/arch/arm/boot/compressed/vmlinux
>> There are 22 section headers, starting at offset 0x4b3e14:
>>
>> Section Headers:
>> [Nr] Name Type Addr Off Size ES Flg Lk Inf Al
>> [ 0] NULL 00000000 000000 000000 00 0 0 0
>> [ 1] .text PROGBITS 00000000 010000 005ef8 00 AX 0 0 32
>> [ 2] .rodata PROGBITS 00005ef8 015ef8 000d4c 00 A 0 0 4
>> [ 3] .piggydata PROGBITS 00006c44 016c44 48a33a 00 A 0 0 1
>> [ 4] .got.plt PROGBITS 00490f80 4a0f80 00000c 04 WA 0 0 4
>> [ 5] .got PROGBITS 00490f8c 4a0f8c 000028 00 WA 0 0 4
>> [ 6] .pad PROGBITS 00490fb4 4a0fb4 000004 00 WA 0 0 1
>> [ 7] .bss NOBITS 00490fb8 4a0fb8 00001c 00 WA 0 0 4
>> [ 8] .stack NOBITS 00490fd8 4a0fb8 001000 00 WA 0 0 1
>> [ 9] .comment PROGBITS 00000000 4a0fb8 00001c 01 MS 0 0 1
>> [10] .ARM.attributes ARM_ATTRIBUTES 00000000 4a0fd4 00002d 00 0 0 1
>> [11] .debug_line PROGBITS 00000000 4a1001 00281b 00 0 0 1
>> [12] .debug_info PROGBITS 00000000 4a381c 0066cb 00 0 0 1
>> [13] .debug_abbrev PROGBITS 00000000 4a9ee7 0013ea 00 0 0 1
>> [14] .debug_aranges PROGBITS 00000000 4ab2d8 0001a8 00 0 0 8
>> [15] .debug_str PROGBITS 00000000 4ab480 0019b4 01 MS 0 0 1
>> [16] .debug_ranges PROGBITS 00000000 4ace38 000640 00 0 0 8
>> [17] .debug_frame PROGBITS 00000000 4ad478 001010 00 0 0 4
>> [18] .debug_loc PROGBITS 00000000 4ae488 003643 00 0 0 1
>> [19] .symtab SYMTAB 00000000 4b1acc 0015b0 10 20 225 4
>> [20] .strtab STRTAB 00000000 4b307c 000cc5 00 0 0 1
>> [21] .shstrtab STRTAB 00000000 4b3d41 0000d2 00 0 0 1
>> Key to Flags:
>> W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
>> L (link order), O (extra OS processing required), G (group), T (TLS),
>> C (compressed), x (unknown), o (OS specific), E (exclude),
>> y (purecode), p (processor specific)
>>
>
> And this is from the build the build that generated the linker assert?
Humm no, actually it was with the wrong branch. If I have the patch
"ARM: verify size of zImage" then arch/arm/boot/compressed/vmlinux is
not generated.
But if I remove this patch then I can generate this file and so:
arm-linux-gnueabi-readelf -S ../build/arch/arm/boot/compressed/vmlinux
There are 22 section headers, starting at offset 0x4b402c:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .text PROGBITS 00000000 010000 005ef8 00 AX 0 0 32
[ 2] .rodata PROGBITS 00005ef8 015ef8 000d4c 00 A 0 0 4
[ 3] .piggydata PROGBITS 00006c44 016c44 48a552 00 A 0 0 1
[ 4] .got.plt PROGBITS 00491198 4a1198 00000c 04 WA 0 0 4
[ 5] .got PROGBITS 004911a4 4a11a4 000028 00 WA 0 0 4
[ 6] .pad PROGBITS 004911cc 4a11cc 000004 00 WA 0 0 1
[ 7] .bss NOBITS 004911d0 4a11d0 00001c 00 WA 0 0 4
[ 8] .stack NOBITS 004911f0 4a11d0 001000 00 WA 0 0 1
[ 9] .comment PROGBITS 00000000 4a11d0 00001c 01 MS 0 0 1
[10] .ARM.attributes ARM_ATTRIBUTES 00000000 4a11ec 00002d 00 0 0 1
[11] .debug_line PROGBITS 00000000 4a1219 00281b 00 0 0 1
[12] .debug_info PROGBITS 00000000 4a3a34 0066cb 00 0 0 1
[13] .debug_abbrev PROGBITS 00000000 4aa0ff 0013ea 00 0 0 1
[14] .debug_aranges PROGBITS 00000000 4ab4f0 0001a8 00 0 0 8
[15] .debug_str PROGBITS 00000000 4ab698 0019b4 01 MS 0 0 1
[16] .debug_ranges PROGBITS 00000000 4ad050 000640 00 0 0 8
[17] .debug_frame PROGBITS 00000000 4ad690 001010 00 0 0 4
[18] .debug_loc PROGBITS 00000000 4ae6a0 003643 00 0 0 1
[19] .symtab SYMTAB 00000000 4b1ce4 0015b0 10 20 225 4
[20] .strtab STRTAB 00000000 4b3294 000cc5 00 0 0 1
[21] .shstrtab STRTAB 00000000 4b3f59 0000d2 00 0 0 1
>
> Could you check the value of _edata in the output of 'nm vmlinux'
> please?
With this kernel:
arm-linux-gnueabi-nm ../build/arch/arm/boot/compressed/vmlinux | grep _edata
004911d0 D _edata
Gregory
>
> _______________________________________________
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--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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