public inbox for
help / color / mirror / Atom feed
From: Szabolcs Nagy <>
Subject: [glibc/arm/morello/main] aarch64: morello: purecap rawmemchr
Date: Wed, 23 Nov 2022 14:42:23 +0000 (GMT)	[thread overview]
Message-ID: <> (raw);h=20829a45c15fa1a1ead18f6114adf6fd0d02249c

commit 20829a45c15fa1a1ead18f6114adf6fd0d02249c
Author: Carlos Eduardo Seo <>
Date:   Mon Jul 12 15:06:26 2021 -0300

    aarch64: morello: purecap rawmemchr
    Modified rawmemchr to support Arm Morello Capabilities.

 sysdeps/aarch64/morello/rawmemchr.S | 43 +++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/sysdeps/aarch64/morello/rawmemchr.S b/sysdeps/aarch64/morello/rawmemchr.S
new file mode 100644
index 0000000000..10e89ee6b7
--- /dev/null
+++ b/sysdeps/aarch64/morello/rawmemchr.S
@@ -0,0 +1,43 @@
+/* rawmemchr - find a character in a memory zone
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   Lesser General Public License for more details.
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <>.  */
+#include <sysdep.h>
+/* Special case rawmemchr (s, 0) as strlen, otherwise tailcall memchr.
+   Call strlen without setting up a full frame - it preserves x14/x15.
+ENTRY (__rawmemchr)
+	cbz	w1, L(do_strlen)
+	mov	x2, -1
+	b	__memchr
+	mov	c15, c30
+	cfi_return_column (c15)
+	mov	c14, c0
+	bl	__strlen
+	add	c0, c14, x0
+	ret	c15
+END (__rawmemchr)
+weak_alias (__rawmemchr, rawmemchr)
+libc_hidden_builtin_def (__rawmemchr)

             reply	other threads:[~2022-11-23 14:42 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-23 14:42 Szabolcs Nagy [this message]
  -- strict thread matches above, loose matches on Subject: below --
2022-10-27 13:52 Szabolcs Nagy
2022-10-26 15:13 Szabolcs Nagy
2022-08-05 19:32 Szabolcs Nagy

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).