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Date: Mon, 9 Feb 2015 12:38:40 +0100
Message-ID: <CAG7dG+wdV5nB0WqRCzwhDW9=800s+292bL9wRT9jfBNMmYbBAg@mail.gmail.com>
Subject: Re: armv7 and armv8
From: Zbigniew Bodek <zbb@semihalf.com>
To: sbruno@freebsd.org
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2015-02-07 20:10 GMT+01:00 Sean Bruno <sbruno@ignoranthack.me>:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
> Not sure if there's a difference in the ELF header for files on armv7/v8
> vs armv6.  Can someone who has armv7 and arvm8 binaries somewhere send
> me the following for each target arch?
>
> elfdump -e <file>
>
> and
>
> hexdump -C <file>
>
> sean
>
> p.s.
>
> for armv6 this is what I have:
>
> elfdump -e
> /usr/local/poudriere/jails/11armv6/rescue/sh
>
>
> elf header:
>
>         e_ident: ELFCLASS32 ELFDATA2LSB ELFOSABI_SYSV
>         e_type: ET_EXEC
>         e_machine: EM_ARM
>         e_version: EV_CURRENT
>         e_entry: 0x8180
>         e_phoff: 52
>         e_shoff: 7954024
>         e_flags: 83886082
>         e_ehsize: 52
>         e_phentsize: 32
>         e_phnum: 5
>         e_shentsize: 40
>         e_shnum: 20
>         e_shstrndx: 19
>
> hexdump -C /usr/local/poudriere/jails/11armv6/rescue/sh | head
> -2
>
> 00000000  7f 45 4c 46 01 01 01 00  00 00 00 00 00 00 00 00
> |.ELF............|
> 00000010  02 00 28 00 01 00 00 00  80 81 00 00 34 00 00 00
> |..(.........4...|
>
>
>

Hello Sean,

armv8:

elfdump -e sh

elf header:

        e_ident: ELFCLASS64 ELFDATA2LSB ELFOSABI_SYSV
        e_type: ET_EXEC
        e_machine: EM_AARCH64
        e_version: EV_CURRENT
        e_entry: 0x403250
        e_phoff: 64
        e_shoff: 133520
        e_flags: 0
        e_ehsize: 64
        e_phentsize: 56
        e_phnum: 7
        e_shentsize: 64
        e_shnum: 27
        e_shstrndx: 26

hexdump -C sh | head -2
00000000  7f 45 4c 46 02 01 01 00  00 00 00 00 00 00 00 00  |.ELF............|
00000010  02 00 b7 00 01 00 00 00  50 32 40 00 00 00 00 00  |........P2@.....|

Best regards
zbb