[Buildroot] [PATCH V3 RESEND 0/5] Add ILP32 support in aarch64

[Zhangjian (Bamvor) <bamvor.zhangjian@huawei.com>]

Hi, Romain


On 2016/1/24 19:35, Romain Naour wrote:
> Hi Bamvor,
>
> Le 21/01/2016 10:03, Bamvor Zhang Jian a ?crit :
>> Hi, Romain
>>
>> On 01/21/2016 05:26 AM, Romain Naour wrote:
>>> Hi Bamvor,
>>>
>>> Le 19/01/2016 05:00, Bamvor Zhang Jian a ?crit :
>>>> Hi, Romain
>>>>
>>>> On 01/16/2016 11:25 PM, Romain Naour wrote:
>>>>> Hello Bamvor,
>> [...]
>>>>> Can you provide the command lines you used to build the toolchain ? on which abe
>>>>> branch ? Otherwise we can't test your series.
>>>> You could find the toolchain here[1]
>>>
>>> Thanks but this is not a cross-toolchain:
>>>
>>> file bin/aarch64-ilp32-linux-gnu-gcc
>>> bin/aarch64-ilp32-linux-gnu-gcc: ELF 64-bit LSB executable, ARM aarch64, version
>>> 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for
>>> GNU/Linux 3.7.0, BuildID[sha1]=0727b9d5c173c83568f5d19cfc87a05540ec8b77, not
>>> stripped
>>>
>>> It seems that's a native toolchain.
>>>
>>> It should be something like (from aarch64-linaro 2015.08)
>>> file bin/aarch64-linux-gnu-gcc
>>> bin/aarch64-linux-gnu-gcc: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
>>> dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux
>>> 2.6.32, BuildID[sha1]=91a19539d0f6b0f38d599db648b4b5760000666a, not stripped
>>>
>> Yeap, it is not a cross compile. I use it in an aarch64 chroot environment in
>> x86. I feel it is enough to test these patches.
>
> Buildroot is a tool for cross-compiling, you know it ;-)
> Honestly I'm not very interested to test the toolchain by itself, only your
> patches for the external toolchain infra.
>
>>> Can you provide a pre-build toolchain or a recipe to rebuild a aarch64 ipl32
>>> toolchain ?
>> Linaro provide abe[1] to build toochain. You could follow this script[2] to know
>> how to use it. It seems that the server in tcwg is down. Hope, you could make
>> use of the method used by abe system.
>
> I really tried to build a aarch64 ipl32 cross-toolchain with abe but I'm stuck
> with glibc build. I don't know what's the glibc branch I should use.
> By default I used the release/2.20/master branch
>
> aarch64-ilp32-linux-gnu-gcc -mabi=ilp32 -nostdlib -nostartfiles -r -o
> /home/naourr/linaro-toolchain/builds/x86_64-unknown-linux-gnu/aarch64-ilp32-linux-gnu/glibc.git~linaro-2.20-ilp32-ilp32/csu/Scrt1.o
> /home/naourr/linaro-toolchain/builds/x86_64-unknown-linux-gnu/aarch64-ilp32-linux-gnu/glibc.git~linaro-2.20-ilp32-ilp32/csu/start.os
> /home/naourr/linaro-toolchain/builds/x86_64-unknown-linux-gnu/aarch64-ilp32-linux-gnu/glibc.git~linaro-2.20-ilp32-ilp32/csu/abi-note.o
> /home/naourr/linaro-toolchain/builds/x86_64-unknown-linux-gnu/aarch64-ilp32-linux-gnu/glibc.git~linaro-2.20-ilp32-ilp32/csu/init.o
> ../sysdeps/aarch64/start.S: Assembler messages:
> ../sysdeps/aarch64/start.S:92: Error: cannot represent BFD_RELOC_64 relocation
> in this object file format
> ../sysdeps/aarch64/start.S:92: Error: cannot represent BFD_RELOC_64 relocation
> in this object file format
> ../sysdeps/aarch64/start.S:92: Error: cannot represent BFD_RELOC_64 relocation
> in this object file format
> /home/naourr/linaro-toolchain/builds/x86_64-unknown-linux-gnu/aarch64-ilp32-linux-gnu/glibc.git~linaro-2.20-ilp32-ilp32/sysd-rules:1345:
> recipe for target
> '/home/naourr/linaro-toolchain/builds/x86_64-unknown-linux-gnu/aarch64-ilp32-linux-gnu/glibc.git~linaro-2.20-ilp32-ilp32/csu/start.o'
> failed
> make[2]: ***
> [/home/naourr/linaro-toolchain/builds/x86_64-unknown-linux-gnu/aarch64-ilp32-linux-gnu/glibc.git~linaro-2.20-ilp32-ilp32/csu/start.o]
> Error 1
You could this glibc[1]. IIRC, It is for patch v6 rfc2. We are planning to update it for patch v6 rfc5.

Regards

Bamvor


[1] https://github.com/norov/glibc/tree/thunderx-ilp32-32time_toff_t
>
> Also I had several issue with the abe script on my system (Fedora) and I had to
> modify some part of the script to be able to continue the build.
>
> So, It would be great if you can provide a precompiled cross-toolchain.
>
> Best regards,
> Romain
>
>>
>> Regards
>>
>> Bamvor
>>
>> [1] https://git.linaro.org/toolchain/abe.git/blob/refs/heads/benchmarking:/abe.sh
>> [2] https://git.linaro.org/toolchain/spec2xxx-utils.git/blob/refs/heads/test:/bench-ilp32.sh
>>
>>>>>
>>>>> Do you know if Linaro plans to release a ipl32 toolchain ?
>>>> It seems that linaro will not release it before patches for ilp32 of kernel and
>>>> glibc upstreamed.
>>>> Here[2] is a status for ilp32 in linaro.
>>>
>>> Thanks for the link.
>>>
>>> Best regards,
>>> Romain
>>>
>>>>
>>>> Regards
>>>>
>>>> Bamvor
>>>>
>>>> [1] http://people.linaro.org/~maxim.kuvyrkov/bench-ilp32/
>>>> [2] https://wiki.linaro.org/Platform/arm64-ilp32
>>>>
>>>>> Best regards,
>>>>> Romain Naour
>>>>>
>>>>>>
>>>>>> changes since v2
>>>>>> 1.  rebase on the patch have been .
>>>>>>      "827ba46 aarch64: add big endian(aarch64_be) support"
>>>>>> 2.  Add "!BR2_aarch64_be" along with "!BR2_aarch64" in patch 1/5 according to
>>>>>>      the suggestion from Thomas.
>>>>>> 3.  Improve the ifeq in patch 2/5 according to Gustavo.
>>>>>> 4.  Do not pass invalid "-mabi" option to ld in patch 3/5 according to Gustavo.
>>>>>>
>>>>>> changes since v1
>>>>>> 1.  Avoid mabi issue in gcc 4.8 while build aarch64 lp64.
>>>>>> 2.  Change default libc, toolchain for ilp32 build.
>>>>>> 3.  Others changes suggested by Gustavo.
>>>>>>
>>>>>> [1] http://lists.busybox.net/pipermail/buildroot/2015-March/122115.html
>>>>>> [2] http://lists.busybox.net/pipermail/buildroot/2015-March/122424.html
>>>>>> [3] https://git.linaro.org/kernel/linux-linaro-tracking.git
>>>>>> [4] https://wiki.linaro.org/ABE
>>>>>>
>>>>>>
>>>>>> Bamvor Jian Zhang (5):
>>>>>>    aarch64: align aarch64_be config with aarch64s'
>>>>>>    aarch64: ilp32: handle special file name
>>>>>>    aarch64: ilp32: add ilp32 compiler and linker flags
>>>>>>    aarch64: ilp32: add ilp32 build config
>>>>>>    aarch64: ilp32 defconfig examples
>>>>>>
>>>>>>   Makefile                                           |  6 +++
>>>>>>   arch/Config.in.aarch64                             | 36 ++++++++++++++++++
>>>>>>   configs/aarch64_be_defconfig                       |  2 +
>>>>>>   configs/aarch64_be_ilp32_defconfig                 |  8 ++++
>>>>>>   configs/aarch64_ilp32_defconfig                    |  8 ++++
>>>>>>   package/Makefile.in                                | 13 ++++++-
>>>>>>   package/binutils/Config.in                         |  4 +-
>>>>>>   package/binutils/Config.in.host                    |  5 ++-
>>>>>>   package/dropwatch/Config.in                        |  5 ++-
>>>>>>   package/gcc/Config.in.host                         | 11 +++---
>>>>>>   package/gdb/Config.in.host                         |  2 +-
>>>>>>   package/gpsd/Config.in                             |  2 +-
>>>>>>   package/lightning/Config.in                        |  5 ++-
>>>>>>   package/nginx/Config.in                            |  3 +-
>>>>>>   package/oprofile/Config.in                         |  6 ++-
>>>>>>   toolchain/Config.in                                |  2 +
>>>>>>   toolchain/helpers.mk                               |  5 ++-
>>>>>>   toolchain/toolchain-buildroot/Config.in            |  7 ++--
>>>>>>   toolchain/toolchain-external/Config.in             | 22 +++++++++++
>>>>>>   toolchain/toolchain-external/toolchain-external.mk | 44 +++++++++++++++++++++-
>>>>>>   20 files changed, 169 insertions(+), 27 deletions(-)
>>>>>>   create mode 100644 configs/aarch64_be_defconfig
>>>>>>   create mode 100644 configs/aarch64_be_ilp32_defconfig
>>>>>>   create mode 100644 configs/aarch64_ilp32_defconfig
>>>>>>
>>>>>
>>>>
>>
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