From e8728f756af8bd246bb7faab89c2fbedeb41fd40 Mon Sep 17 00:00:00 2001 From: Szabolcs Nagy Date: Wed, 16 Mar 2022 10:59:17 +0000 Subject: [PATCH] aarch64: morello: string: dummy c strcspn avoids out of bounds access of the generic implementation. --- sysdeps/aarch64/morello/strcspn.c | 35 +++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 sysdeps/aarch64/morello/strcspn.c diff --git a/sysdeps/aarch64/morello/strcspn.c b/sysdeps/aarch64/morello/strcspn.c new file mode 100644 index 00000000000..82c33cdcbff --- /dev/null +++ b/sysdeps/aarch64/morello/strcspn.c @@ -0,0 +1,35 @@ +/* Simple strcspn. + + 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 + +size_t strcspn (const char *str, const char *reject) +{ + if (reject[0] == 0 || reject[1] == 0) + return __strchrnul (str, reject[0]) - str; + + unsigned char table[256] = {0}; + unsigned char *us; + for (us = (unsigned char*) reject; *us != 0; table[*us++] = 1); + table[*us] = 1; + + for (us = (unsigned char*) str; table[*us] == 0; us++); + return us - (unsigned char *) str; +} +libc_hidden_builtin_def (strcspn) -- 2.47.2