SH: ____longjmp_chk for GNU/Linux with sigaltstack support

[Thomas Schwinge]

Hi!

On Wed, 13 Jun 2012 12:28:04 +0200, I wrote:
> 	* sysdeps/unix/sysv/linux/sh/____longjmp_chk.S: New file, based on
> 	sysdeps/sh/____longjmp_chk.S.

I forgot to say: this code if not optimal because of the four registers
that are spilled onto the stack around the sigaltstack system call, but I
implemented it this way in order to avoid restructuring all the different
cases in sysdeps/sh/sh{3,4}/__longjmp.S -- ____longjmp_chk surely is not
used in a time-critical execution path, and it's only a few additional
CPU instructions/memory cycles anyway.


Grüße,
 Thomas
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