2016-06-20 Wilco Dijkstra <wdijkstr@arm.com>
+ * sysdeps/aarch64/rawmemchr.S (__rawmemchr): New file.
+ * sysdeps/aarch64/strlen.S (__strlen): Change to __strlen to avoid PLT.
+
+2016-06-20 Wilco Dijkstra <wdijkstr@arm.com>
+
* sysdeps/aarch64/memcpy.S (memcpy):
Rewrite of optimized memcpy and memmove.
* sysdeps/aarch64/memmove.S (memmove): Remove
--- /dev/null
+/* rawmemchr - find a character in a memory zone
+
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#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
+
+L(do_strlen):
+ mov x15, x30
+ cfi_return_column (x15)
+ mov x14, x0
+ bl __strlen
+ add x0, x14, x0
+ ret x15
+
+END (__rawmemchr)
+weak_alias (__rawmemchr, rawmemchr)
+libc_hidden_builtin_def (__rawmemchr)
whether the first fetch, which may be misaligned, crosses a page
boundary. */
-ENTRY_ALIGN (strlen, 6)
+ENTRY_ALIGN (__strlen, 6)
and tmp1, srcin, MIN_PAGE_SIZE - 1
mov zeroones, REP8_01
cmp tmp1, MIN_PAGE_SIZE - 16
csel data1, data1, tmp4, eq
csel data2, data2, tmp2, eq
b L(page_cross_entry)
-END (strlen)
+END (__strlen)
+weak_alias (__strlen, strlen)
libc_hidden_builtin_def (strlen)