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

From: Ard Biesheuvel
Date: Mon Oct 30 2017 - 11:07:40 EST

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.



> 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