1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/aarch64/__mcount.S b/sysdeps/aarch64/__mcount.S
new file mode 100644
index 0000000000..9688c41459
--- /dev/null
+++ b/sysdeps/aarch64/__mcount.S
@@ -0,0 +1,47 @@
+/* AArch64 definitions for profiling support.
+   Copyright (C) 2024 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <shlib-compat.h>
+
+ENTRY (__mcount)
+	stp     x29, x30, [sp, -16]!
+	/* Note: xpaclri is needed for frompc because of gcc PR target/94791.  */
+	hint	7
+	mov	x1, x30
+	/* Load the caller return address as frompc.  */
+	ldr	x0, [x29, #8]
+	mov	x30, x0
+	mov	x0, x30
+	/* Use the return address as selfpc.  */
+	mov	x0, x30
+	ldp     x29, x30, [sp], 16
+	b	__mcount_internal
+END (__mcount)
+
+/* We forgot to add _mcount in glibc 2.17.  We added it in 2.18
+   therefore we want it to be added with version GLIBC_2_18.  However,
+   setting the version is not straight forward because a generic
+   Version file includes an earlier 2.xx version for each this symbol
+   and the linker uses the first version it sees.  */
+
+#if SHLIB_COMPAT (libc, GLIBC_2_17, GLIBC_2_18)
+versioned_symbol (libc, __mcount, _mcount, GLIBC_2_18);
+#else
+strong_alias (__mcount, _mcount);
+#endif