From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1944) id 65D8C3853810; Wed, 26 Oct 2022 15:13:55 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 65D8C3853810 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1666797237; bh=cHe57GbVVBtH3MCx3FEgjW+ZDXdLB5iTNtC8sgSnMRs=; h=From:To:Subject:Date:From; b=DIxnY/IcPsAk+RDINunz3fyXHPvg0Q/FCSh0W/O4lq7dUnb2Zim2T+EwhGJa9BvUg gO8FLkJlEOkFuZimKiLcJxHw36qc1iH57DICvu6cbP6jafEZeRMolK/wg0mj//g8ef kqP/Kh24ivN0sCCQK6z0tL4+UQSkcsRIC2WkklnE= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Szabolcs Nagy To: glibc-cvs@sourceware.org Subject: [glibc/arm/morello/main] aarch64: morello: purecap rawmemchr X-Act-Checkin: glibc X-Git-Author: Carlos Eduardo Seo X-Git-Refname: refs/heads/arm/morello/main X-Git-Oldrev: bddf591517fb9acaeb7c2c34ff522b3fd06fc7c2 X-Git-Newrev: 3ce49a6e0d992a3ecdafc5fb9ee7e00d2c5e43a9 Message-Id: <20221026151357.65D8C3853810@sourceware.org> Date: Wed, 26 Oct 2022 15:13:55 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3ce49a6e0d992a3ecdafc5fb9ee7e00d2c5e43a9 commit 3ce49a6e0d992a3ecdafc5fb9ee7e00d2c5e43a9 Author: Carlos Eduardo Seo Date: Mon Jul 12 15:06:26 2021 -0300 aarch64: morello: purecap rawmemchr Modified rawmemchr to support Arm Morello Capabilities. Diff: --- 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 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + 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 + +/* 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 + +L(do_strlen): + 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)