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Message-ID: <20180430020944.GF1392@brightrain.aerifal.cx>
Date: Sun, 29 Apr 2018 22:09:44 -0400
From: Rich Felker <dalias@...c.org>
To: patrick.oppenlander@...il.com
Cc: musl@...ts.openwall.com
Subject: Re: [PATCH] arm asm for vfork
On Mon, Apr 30, 2018 at 11:36:22AM +1000, patrick.oppenlander@...il.com wrote:
> From: Patrick Oppenlander <patrick.oppenlander@...il.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
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