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From: Rich Felker <dalias@libc.org>
To: patrick.oppenlander@gmail.com
Cc: musl@lists.openwall.com
Subject: Re: [PATCH] arm asm for vfork
Date: Sun, 29 Apr 2018 22:09:44 -0400	[thread overview]
Message-ID: <20180430020944.GF1392@brightrain.aerifal.cx> (raw)
In-Reply-To: <20180430013622.28792-2-patrick.oppenlander@gmail.com>

On Mon, Apr 30, 2018 at 11:36:22AM +1000, patrick.oppenlander@gmail.com wrote:
> From: Patrick Oppenlander <patrick.oppenlander@gmail.com>
> 
> ---
>  src/process/arm/vfork.s | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>  create mode 100644 src/process/arm/vfork.s
> 
> diff --git a/src/process/arm/vfork.s b/src/process/arm/vfork.s
> new file mode 100644
> index 00000000..f01fe1d0
> --- /dev/null
> +++ b/src/process/arm/vfork.s
> @@ -0,0 +1,12 @@
> +.syntax unified
> +.global __vfork
> +.weak vfork
> +.type __vfork,%function
> +.type vfork,%function
> +__vfork:
> +vfork:
> +	mov ip, r7
> +	mov r7, 190
> +	swi 0
> +	mov r7, ip
> +	b __syscall_ret
> -- 
> 2.17.0

Thanks. We'll need this for nommu users; right now that's not so
practical but it will be once we get fdpic added.

I haven't tested, but the patch looks right. Elsewhere we use svc
instead of swi; not sure if that matters.

Rich


  reply	other threads:[~2018-04-30  2:09 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-30  1:36 patrick.oppenlander
2018-04-30  1:36 ` patrick.oppenlander
2018-04-30  2:09   ` Rich Felker [this message]
2018-04-30  2:32     ` Patrick Oppenlander
2018-07-18  2:20       ` Patrick Oppenlander
2018-07-18  2:35         ` Rich Felker
2018-07-18  4:14           ` Patrick Oppenlander
2018-09-06 15:02             ` Patrick Oppenlander
2018-09-06 15:19               ` Rich Felker
2018-09-07  2:05                 ` Rich Felker
2018-09-07  6:29                   ` Patrick Oppenlander
2018-07-18 13:44         ` Christopher Friedt

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