[GSoC2016] Weekly Report of Porting musl to RISC-V Project #1

[GSoC2016] Weekly Report of Porting musl to RISC-V Project #1

[Masanori Ogino]

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Hello all,

It is the second issue of weekly report of porting musl to RISC-V GSoC project.

I am still working on integrating toolchain and building userland.

On the toolchain side, the WIP branch [1] has been upgraded to recent
upstream using riscv-binutils-gdb.

On the userland side, I have built statically-linked BusyBox as the
first target. BusyBox 1.24.2 can be built using [1] and attached
.config file. Using the Linux kernel 4.1.17 + RISC-V patches [2] built
with a glibc-based toolchain and Spike, a system with the busybox
binary boots up, launches init and finally provides a shell!

(I am using Linux kernel built with a glibc-based toolchain because I
am using GCC6 for integration and Linux 4.1.17 has no support for
that.)

However, the shell can't execute other programs with "permission
denied" errors, while built-in commands works well. I try to figure
out the cause.

The progress is slower than what I expected last week but there is no
delay from the proposed plan. In next week, I will debug the issue
above and work on the libc's arch-dependent part.

Have a nice weekend!

[1]: https://github.com/omasanori/riscv-gnu-toolchain/tree/musl
[2]: https://github.com/riscv/riscv-linux

-- 
Masanori Ogino

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Re: [GSoC2016] Weekly Report of Porting musl to RISC-V Project #1

[Szabolcs Nagy]

* Masanori Ogino <masanori.ogino@gmail.com> [2016-06-03 23:29:58 +0900]:
> (I am using Linux kernel built with a glibc-based toolchain because I
> am using GCC6 for integration and Linux 4.1.17 has no support for
> that.)

ln -s compiler-gcc5.h $LINUX/include/linux/compiler-gcc6.h

should fix that.

Re: [GSoC2016] Weekly Report of Porting musl to RISC-V Project #1

[Masanori Ogino]

(Ah, the number in the title should be 2, not 1...)

Hello,

2016-06-04 0:28 GMT+09:00 Szabolcs Nagy <nsz@port70.net>:
> * Masanori Ogino <masanori.ogino@gmail.com> [2016-06-03 23:29:58 +0900]:
>> (I am using Linux kernel built with a glibc-based toolchain because I
>> am using GCC6 for integration and Linux 4.1.17 has no support for
>> that.)
>
> ln -s compiler-gcc5.h $LINUX/include/linux/compiler-gcc6.h
>
> should fix that.

Thank you for your advice! I will try it.

-- 
Masanori Ogino

Re: [GSoC2016] Weekly Report of Porting musl to RISC-V Project #1

[Masanori Ogino]

Thanks for your attention, FRIGN!

2016-05-30 3:14 GMT+09:00 FRIGN <dev@frign.de>:
> On Fri, 27 May 2016 23:02:58 +0900
> Masanori Ogino <masanori.ogino@gmail.com> wrote:
>
> Hey Masanoir,
>
>> The coding period of GSoC 2016 began in Monday. Now it's Friday
>> midnight (in Japan) so I'd like to report the progress on the project.
>
> that's very cool!
>
>> I forked lluixhi's RISC-V port of musl [1] as written in my proposal,
>> and applied some patches to catch up with the bleeding edge of the
>> library. My WIP branch [2] has no significant differences from the
>> origin in the arch-dependent part for now.
>
> This is very good news. I wasn't sure how easy it would be to merge
> those upstream changes.
>
>> The riscv-gnu-toolchain has been changed to build musl-based
>> toolchains. Since the master branch of the toolchain has migrated to
>> GCC 6.1 containing musl support, the integration is straightforward.
>> If you want to try it, please execute `make musl` after configuration
>> with my WIP branch [3].
>
> Will look into it!
>
>> Now I'm working on building a root filesystem with the musl-based
>> toolchain to test the port and preparing patches to address some
>> problems I've found. I hope we will be able to launch a Linux system
>> based on musl on Spike next week.
>
> I am looking forward to this! Keep up the great work guys!
>
> Cheers
>
> FRIGN
>
> --
> FRIGN <dev@frign.de>



-- 
Masanori Ogino <masanori.ogino@gmail.com>
http://twitter.com/omasanori
http://gplus.to/omasanori

Re: [GSoC2016] Weekly Report of Porting musl to RISC-V Project #1

[FRIGN]

On Fri, 27 May 2016 23:02:58 +0900
Masanori Ogino <masanori.ogino@gmail.com> wrote:

Hey Masanoir,

> The coding period of GSoC 2016 began in Monday. Now it's Friday
> midnight (in Japan) so I'd like to report the progress on the project.

that's very cool!

> I forked lluixhi's RISC-V port of musl [1] as written in my proposal,
> and applied some patches to catch up with the bleeding edge of the
> library. My WIP branch [2] has no significant differences from the
> origin in the arch-dependent part for now.

This is very good news. I wasn't sure how easy it would be to merge
those upstream changes.

> The riscv-gnu-toolchain has been changed to build musl-based
> toolchains. Since the master branch of the toolchain has migrated to
> GCC 6.1 containing musl support, the integration is straightforward.
> If you want to try it, please execute `make musl` after configuration
> with my WIP branch [3].

Will look into it!

> Now I'm working on building a root filesystem with the musl-based
> toolchain to test the port and preparing patches to address some
> problems I've found. I hope we will be able to launch a Linux system
> based on musl on Spike next week.

I am looking forward to this! Keep up the great work guys!

Cheers

FRIGN

-- 
FRIGN <dev@frign.de>

[GSoC2016] Weekly Report of Porting musl to RISC-V Project #1

[Masanori Ogino]

Hello,

The coding period of GSoC 2016 began in Monday. Now it's Friday
midnight (in Japan) so I'd like to report the progress on the project.

I forked lluixhi's RISC-V port of musl [1] as written in my proposal,
and applied some patches to catch up with the bleeding edge of the
library. My WIP branch [2] has no significant differences from the
origin in the arch-dependent part for now.

The riscv-gnu-toolchain has been changed to build musl-based
toolchains. Since the master branch of the toolchain has migrated to
GCC 6.1 containing musl support, the integration is straightforward.
If you want to try it, please execute `make musl` after configuration
with my WIP branch [3].

Now I'm working on building a root filesystem with the musl-based
toolchain to test the port and preparing patches to address some
problems I've found. I hope we will be able to launch a Linux system
based on musl on Spike next week.

Any comments would be appreciated. Please tell me your opinion!

Have a nice weekend!

[1]: https://github.com/lluixhi/musl-riscv
[2]: https://github.com/omasanori/musl/tree/riscv
[3]: https://github.com/omasanori/riscv-gnu-toolchain/tree/musl

-- 
Masanori Ogino