linux-kernel - Re: [PATCH] ARM: add a private asm/unaligned.h

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Message-ID: <CAKv+Gu-9pQjBb0YXADRT87qpFb6ttT3tLGBnGNgZj3B1VDRN6Q@mail.gmail.com>
Date:   Mon, 30 Oct 2017 15:20:11 +0000
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrea Adami <andrea.adami@...il.com>,
        Romain Izard <romain.izard.pro@...il.com>,
        Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>,
        Petr Cvek <petrcvekcz@...il.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: add a private asm/unaligned.h

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?

Could you check the value of _edata in the output of 'nm vmlinux' please?