From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1944) id E63743853D78; Wed, 23 Nov 2022 14:42:23 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E63743853D78 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1669214543; bh=fqrwqPvsir+VW/Hrq1V1ZfLEgB37I7bde45QWQ2svgE=; h=From:To:Subject:Date:From; b=qU6+Cvv4EgSYp8AW3liC2e7t7h3MYNAHqeDlsF236Ubv68zrlnmGpKLSw+LH0lo40 mRYO1jUt3nPPRQO+gkykjdNW9RqNltPuSdZctBrPq6rfaYRlaAyWPK/MEwAtN6zCbQ djFnBd8LaxNjXT3F0zNkwiYnLI9W1UnXO+KutaXI= 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: 479ccba5b1175b94d349b228876023ece8687830 X-Git-Newrev: 20829a45c15fa1a1ead18f6114adf6fd0d02249c Message-Id: <20221123144223.E63743853D78@sourceware.org> Date: Wed, 23 Nov 2022 14:42:23 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;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. 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)