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

[Gregory CLEMENT]

Hi Ard,
 
 On lun., oct. 30 2017, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote:

> On 30 October 2017 at 15:05, Gregory CLEMENT
> <gregory.clement@xxxxxxxxxxxxxxxxxx> wrote:
>> Hi Ard,
>>
>>  On lun., oct. 30 2017, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> 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)

Gregory
>
>
>
>> There are 40 section headers, starting at offset 0x7cc06bc:
>>
>> Section Headers:
>>   [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
>>   [ 0]                   NULL            00000000 000000 000000 00      0   0  0
>>   [ 1] .head.text        PROGBITS        c0008000 008000 00026c 00  AX  0   0  4
>>   [ 2] .text             PROGBITS        c0100000 010000 6bd280 00  AX  0   0 64
>>   [ 3] .fixup            PROGBITS        c07bd280 6cd280 00001c 00  AX  0   0  4
>>   [ 4] .rodata           PROGBITS        c0800000 6d0000 168321 00  WA  0   0 64
>>   [ 5] .pci_fixup        PROGBITS        c0968324 838324 001e40 00   A  0   0  4
>>   [ 6] __ksymtab         PROGBITS        c096a164 83a164 007c28 00   A  0   0  4
>>   [ 7] __ksymtab_gpl     PROGBITS        c0971d8c 841d8c 0081c8 00   A  0   0  4
>>   [ 8] __ksymtab_strings PROGBITS        c0979f54 849f54 0266e6 00   A  0   0  1
>>   [ 9] __param           PROGBITS        c09a063c 87063c 00102c 00   A  0   0  4
>>   [10] __modver          PROGBITS        c09a1668 871668 000998 00   A  0   0  4
>>   [11] __ex_table        PROGBITS        c09a2000 872000 000ef0 00   A  0   0  8
>>   [12] .ARM.unwind_idx   ARM_EXIDX       c09a2ef0 872ef0 02f348 00  AL 17   0  4
>>   [13] .ARM.unwind_tab   PROGBITS        c09d2238 8a2238 001458 00   A  0   0  4
>>   [14] .notes            NOTE            c09d3690 8a3690 000024 00   A  0   0  4
>>   [15] .vectors          PROGBITS        ffff0000 8b0000 000020 00  AX  0   0  4
>>   [16] .stubs            PROGBITS        ffff1000 8b1000 0002ac 00  AX  0   0 32
>>   [17] .init.text        PROGBITS        c0a002e0 8c02e0 04ee58 00  AX  0   0 32
>>   [18] .exit.text        PROGBITS        c0a4f138 90f138 0018cc 00  AX  0   0  4
>>   [19] .init.arch.info   PROGBITS        c0a50a04 910a04 000270 00   A  0   0  4
>>   [20] .init.tagtable    PROGBITS        c0a50c74 910c74 000040 00   A  0   0  4
>>   [21] .init.smpalt      PROGBITS        c0a50cb4 910cb4 00d070 00   A  0   0  4
>>   [22] .init.pv_table    PROGBITS        c0a5dd24 91dd24 0001ec 00   A  0   0  1
>>   [23] .init.data        PROGBITS        c0a5e000 91e000 011e7c 00  WA  0   0 4096
>>   [24] .data..percpu     PROGBITS        c0a70000 930000 008f0c 00  WA  0   0 64
>>   [25] .data             PROGBITS        c0b00000 940000 07f5e8 00  WA  0   0 64
>>   [26] .bss              NOBITS          c0b7f600 9bf5e8 02be6c 00  WA  0   0 64
>>   [27] .comment          PROGBITS        00000000 9bf5e8 00001c 01  MS  0   0  1
>>   [28] .ARM.attributes   ARM_ATTRIBUTES  00000000 9bf604 000031 00      0   0  1
>>   [29] .debug_line       PROGBITS        00000000 9bf635 706427 00      0   0  1
>>   [30] .debug_info       PROGBITS        00000000 10c5a5c 5c11e67 00      0   0  1
>>   [31] .debug_abbrev     PROGBITS        00000000 6cd78c3 2efd55 00      0   0  1
>>   [32] .debug_aranges    PROGBITS        00000000 6fc7618 011340 00      0   0  8
>>   [33] .debug_str        PROGBITS        00000000 6fd8958 24bc04 01  MS  0   0  1
>>   [34] .debug_ranges     PROGBITS        00000000 7224560 1f2bd0 00      0   0  8
>>   [35] .debug_frame      PROGBITS        00000000 7417130 14fa24 00      0   0  4
>>   [36] .debug_loc        PROGBITS        00000000 7566b54 4562b5 00      0   0  1
>>   [37] .symtab           SYMTAB          00000000 79bce0c 1b8f60 10     38 95872  4
>>   [38] .strtab           STRTAB          00000000 7b75d6c 14a7a2 00      0   0  1
>>   [39] .shstrtab         STRTAB          00000000 7cc050e 0001ab 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)
>>
>>
>> arm-linux-gnueabihf-readelf -S ../build/vmlinux
>> There are 40 section headers, starting at offset 0x7cc853c:
>>
>> Section Headers:
>>   [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
>>   [ 0]                   NULL            00000000 000000 000000 00      0   0  0
>>   [ 1] .head.text        PROGBITS        c0008000 008000 00026c 00  AX  0   0  4
>>   [ 2] .text             PROGBITS        c0100000 010000 6bd860 00  AX  0   0 64
>>   [ 3] .fixup            PROGBITS        c07bd860 6cd860 00001c 00  AX  0   0  4
>>   [ 4] .rodata           PROGBITS        c0800000 6d0000 168361 00  WA  0   0 64
>>   [ 5] .pci_fixup        PROGBITS        c0968364 838364 001e40 00   A  0   0  4
>>   [ 6] __ksymtab         PROGBITS        c096a1a4 83a1a4 007c28 00   A  0   0  4
>>   [ 7] __ksymtab_gpl     PROGBITS        c0971dcc 841dcc 0081c8 00   A  0   0  4
>>   [ 8] __ksymtab_strings PROGBITS        c0979f94 849f94 0266e6 00   A  0   0  1
>>   [ 9] __param           PROGBITS        c09a067c 87067c 00102c 00   A  0   0  4
>>   [10] __modver          PROGBITS        c09a16a8 8716a8 000958 00   A  0   0  4
>>   [11] __ex_table        PROGBITS        c09a2000 872000 000ef0 00   A  0   0  8
>>   [12] .ARM.unwind_idx   ARM_EXIDX       c09a2ef0 872ef0 02f368 00  AL 17   0  4
>>   [13] .ARM.unwind_tab   PROGBITS        c09d2258 8a2258 001458 00   A  0   0  4
>>   [14] .notes            NOTE            c09d36b0 8a36b0 000024 00   A  0   0  4
>>   [15] .vectors          PROGBITS        ffff0000 8b0000 000020 00  AX  0   0  4
>>   [16] .stubs            PROGBITS        ffff1000 8b1000 0002ac 00  AX  0   0 32
>>   [17] .init.text        PROGBITS        c0a002e0 8c02e0 04ee58 00  AX  0   0 32
>>   [18] .exit.text        PROGBITS        c0a4f138 90f138 0018cc 00  AX  0   0  4
>>   [19] .init.arch.info   PROGBITS        c0a50a04 910a04 000270 00   A  0   0  4
>>   [20] .init.tagtable    PROGBITS        c0a50c74 910c74 000040 00   A  0   0  4
>>   [21] .init.smpalt      PROGBITS        c0a50cb4 910cb4 00d070 00   A  0   0  4
>>   [22] .init.pv_table    PROGBITS        c0a5dd24 91dd24 0001ec 00   A  0   0  1
>>   [23] .init.data        PROGBITS        c0a5e000 91e000 011e7c 00  WA  0   0 4096
>>   [24] .data..percpu     PROGBITS        c0a70000 930000 008f0c 00  WA  0   0 64
>>   [25] .data             PROGBITS        c0b00000 940000 07f5e8 00  WA  0   0 64
>>   [26] .bss              NOBITS          c0b7f600 9bf5e8 02be6c 00  WA  0   0 64
>>   [27] .comment          PROGBITS        00000000 9bf5e8 00001c 01  MS  0   0  1
>>   [28] .ARM.attributes   ARM_ATTRIBUTES  00000000 9bf604 000031 00      0   0  1
>>   [29] .debug_line       PROGBITS        00000000 9bf635 70533b 00      0   0  1
>>   [30] .debug_info       PROGBITS        00000000 10c4970 5c18a6b 00      0   0  1
>>   [31] .debug_abbrev     PROGBITS        00000000 6cdd3db 2eff72 00      0   0  1
>>   [32] .debug_aranges    PROGBITS        00000000 6fcd350 011340 00      0   0  8
>>   [33] .debug_str        PROGBITS        00000000 6fde690 24bc92 01  MS  0   0  1
>>   [34] .debug_ranges     PROGBITS        00000000 722a328 1f41c8 00      0   0  8
>>   [35] .debug_frame      PROGBITS        00000000 741e4f0 14fa78 00      0   0  4
>>   [36] .debug_loc        PROGBITS        00000000 756df68 456ca3 00      0   0  1
>>   [37] .symtab           SYMTAB          00000000 79c4c0c 1b8f90 10     38 95875  4
>>   [38] .strtab           STRTAB          00000000 7b7db9c 14a7f5 00      0   0  1
>>   [39] .shstrtab         STRTAB          00000000 7cc8391 0001ab 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)
>>
>> Gregory
>>
>> --
>> Gregory Clement, Free Electrons
>> Kernel, drivers, real-time and embedded Linux
>> development, consulting, training and support.
>> http://free-electrons.com
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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