linux-kernel - Re: [PATCH] cris: Wire up missing syscalls

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Date:	Wed, 3 Jun 2015 19:36:47 +0800
From:	Chen Gang <xili_gchen_5257@...mail.com>
To:	Jesper Nilsson <jesper.nilsson@...s.com>
CC:	Jesper Nilsson <jespern@...s.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-cris-kernel <linux-cris-kernel@...s.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cris: Wire up missing syscalls

On 06/03/2015 06:20 PM, Jesper Nilsson wrote:
> 
> On Wed, May 06, 2015 at 03:48:12PM +0200, Chen Gang wrote:
>> The related warnings:
>>
>>     CALL    scripts/checksyscalls.sh
>>   <stdin>:1229:2: warning: #warning syscall sched_setattr not implemented [-Wcpp]
>>   <stdin>:1232:2: warning: #warning syscall sched_getattr not implemented [-Wcpp]
>>   <stdin>:1235:2: warning: #warning syscall renameat2 not implemented [-Wcpp]
>>   <stdin>:1238:2: warning: #warning syscall seccomp not implemented [-Wcpp]
>>   <stdin>:1241:2: warning: #warning syscall getrandom not implemented [-Wcpp]
>>   <stdin>:1244:2: warning: #warning syscall memfd_create not implemented [-Wcpp]
>>   <stdin>:1247:2: warning: #warning syscall bpf not implemented [-Wcpp]
>>   <stdin>:1250:2: warning: #warning syscall execveat not implemented [-Wcpp]
>>
>> Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
> 
> Thanks and applied, sorry for the long delay, I had to rewrite the patch a bit
> since the v10 and v32 does not have the same standard in prefixing underscores.
> Also, to be safe I also bumped the NR_syscalls as below.
> 

Oh, it doesn't matter, everyone's time resources are expensive, so I
should/can understand your delay response.

I also delayed many things, e.g. I planed to wire up all syscalls for
all archs within 2015-05-31, but I delayed (2 another archs: frv and
m32r are still left, I shall try to send patches for them, next).

 - One main excuse is I have to devote much free time resources on qemu,
   which I have delayed too much to bear (now, I am still trying).

 - The other reason is frv upstream compiler can be built, but can not
   work at all, I have to analyse it firstly.

Sorry for my carelessness: use "_sys*", and keep original NR_syscalls no
touch. And also 3 additional things I guess we may need a look:

 - For v10, need we also use "sys*" instead of "_sys*"?

 - Most archs do not implement seccomp and bpf, which can pass building,
   but will return -ENOSYS during running. Need we left them still as
   warnings? (I guess, it depends on the maintainer's taste).

 - In the latest next tree, it also add additional userfaultfd syscall,
   need we add it, too?


Thanks.

> ---
>  arch/cris/arch-v10/kernel/entry.S   |    8 ++++++++
>  arch/cris/arch-v32/kernel/entry.S   |    8 ++++++++
>  arch/cris/include/asm/unistd.h      |    2 +-
>  arch/cris/include/uapi/asm/unistd.h |    8 ++++++++
>  4 files changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/cris/arch-v10/kernel/entry.S b/arch/cris/arch-v10/kernel/entry.S
> index 81570fc..d94c520 100644
> --- a/arch/cris/arch-v10/kernel/entry.S
> +++ b/arch/cris/arch-v10/kernel/entry.S
> @@ -955,6 +955,14 @@ sys_call_table:
>  	.long sys_process_vm_writev
>  	.long sys_kcmp			/* 350 */
>  	.long sys_finit_module
> +	.long _sys_sched_setattr
> +	.long _sys_sched_getattr
> +	.long _sys_renameat2
> +	.long _sys_seccomp		/* 355 */
> +	.long _sys_getrandom
> +	.long _sys_memfd_create
> +	.long _sys_bpf
> +	.long _sys_execveat
>  
>          /*
>           * NOTE!! This doesn't have to be exact - we just have
> diff --git a/arch/cris/arch-v32/kernel/entry.S b/arch/cris/arch-v32/kernel/entry.S
> index 026a0b2..1c5595a 100644
> --- a/arch/cris/arch-v32/kernel/entry.S
> +++ b/arch/cris/arch-v32/kernel/entry.S
> @@ -875,6 +875,14 @@ sys_call_table:
>  	.long sys_process_vm_writev
>  	.long sys_kcmp			/* 350 */
>  	.long sys_finit_module
> +	.long sys_sched_setattr
> +	.long sys_sched_getattr
> +	.long sys_renameat2
> +	.long sys_seccomp		/* 355 */
> +	.long sys_getrandom
> +	.long sys_memfd_create
> +	.long sys_bpf
> +	.long sys_execveat
>  
>  	/*
>  	 * NOTE!! This doesn't have to be exact - we just have
> diff --git a/arch/cris/include/asm/unistd.h b/arch/cris/include/asm/unistd.h
> index 0f40fed..9c23535 100644
> --- a/arch/cris/include/asm/unistd.h
> +++ b/arch/cris/include/asm/unistd.h
> @@ -4,7 +4,7 @@
>  #include <uapi/asm/unistd.h>
>  
>  
> -#define NR_syscalls 360
> +#define NR_syscalls 365
>  
>  #include <arch/unistd.h>
>  
> diff --git a/arch/cris/include/uapi/asm/unistd.h b/arch/cris/include/uapi/asm/unistd.h
> index f3287fa..062b648 100644
> --- a/arch/cris/include/uapi/asm/unistd.h
> +++ b/arch/cris/include/uapi/asm/unistd.h
> @@ -356,5 +356,13 @@
>  #define __NR_process_vm_writev	349
>  #define __NR_kcmp		350
>  #define __NR_finit_module	351
> +#define __NR_sched_setattr	352
> +#define __NR_sched_getattr	353
> +#define __NR_renameat2		354
> +#define __NR_seccomp		355
> +#define __NR_getrandom		356
> +#define __NR_memfd_create	357
> +#define __NR_bpf		358
> +#define __NR_execveat		359
>  
>  #endif /* _UAPI_ASM_CRIS_UNISTD_H_ */
> 

-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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