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Backport of commit f8b4877a75765b14432a6f83ead11dcecc5b1985
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Author: Marcus Shawcroft <marcus.shawcroft@linaro.org>
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Date: Fri Jul 26 08:29:17 2013 +0100
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[AArch64] Provide symbol version for _mcount.
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2013-07-26 Marcus Shawcroft <marcus.shawcroft@linaro.org>
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* sysdeps/aarch64/Versions: New file.
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* sysdeps/aarch64/machine-gmon.h: New file.
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* sysdeps/aarch64/mcount.c: New file.
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* sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist (_mcount): Add.
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diff -ruNp glibc-2.17-c758a686/ports/sysdeps/aarch64/machine-gmon.h glibc-2.17-c758a686/ports/sysdeps/aarch64/machine-gmon.h
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--- glibc-2.17-c758a686/ports/sysdeps/aarch64/machine-gmon.h 2012-12-24 22:02:13.000000000 -0500
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+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/machine-gmon.h 2014-03-27 12:06:51.361046886 -0400
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@@ -1,5 +1,5 @@
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-/* Copyright (C) 2011-2012 Free Software Foundation, Inc.
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-
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+/* AArch64 definitions for profiling support.
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+ Copyright (C) 1996-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@@ -13,13 +13,22 @@
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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- License along with the GNU C Library. If not, see
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+ License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#define _MCOUNT_DECL(from, self) \
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- void __mcount_internal (u_long from, u_long self)
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-
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-/* Call __mcount_internal with our the return PC for our caller, and
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- the return PC our caller will return to. Empty since we use an
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- assembly stub instead. */
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-#define MCOUNT
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+/* Accept 'frompc' address as argument from the function that calls
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+ __mcount for profiling. Use __builtin_return_address (0)
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+ for the 'selfpc' address. */
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+
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+#include <sysdep.h>
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+
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+static void mcount_internal (u_long frompc, u_long selfpc);
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+
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+#define _MCOUNT_DECL(frompc, selfpc) \
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+static inline void mcount_internal (u_long frompc, u_long selfpc)
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+
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+#define MCOUNT \
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+void __mcount (void *frompc) \
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+{ \
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+ mcount_internal ((u_long) frompc, (u_long) RETURN_ADDRESS (0)); \
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+}
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diff -ruNp glibc-2.17-c758a686/ports/sysdeps/aarch64/mcount.c glibc-2.17-c758a686/ports/sysdeps/aarch64/mcount.c
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--- glibc-2.17-c758a686/ports/sysdeps/aarch64/mcount.c 1969-12-31 19:00:00.000000000 -0500
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+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/mcount.c 2014-03-27 11:54:54.435418262 -0400
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@@ -0,0 +1,33 @@
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+/* Copyright (C) 2013 Free Software Foundation, Inc.
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+
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library. If not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <shlib-compat.h>
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+
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+#include <gmon/mcount.c>
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+
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+/* We forgot to add _mcount in glibc 2.17. We added it in 2.18
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+ therefore we want it to be added with version GLIBC_2_18. However,
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+ setting the version is not straight forward because a generic
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+ Version file includes an earlier 2.xx version for each this symbol
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+ and the linker uses the first version it sees. */
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+
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+#if SHLIB_COMPAT (libc, GLIBC_2_17, GLIBC_2_18)
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+versioned_symbol (libc, __mcount, _mcount, GLIBC_2_18);
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+#else
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+strong_alias (__mcount, _mcount);
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+#endif
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diff -ruNp glibc-2.17-c758a686/ports/sysdeps/aarch64/Versions glibc-2.17-c758a686/ports/sysdeps/aarch64/Versions
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--- glibc-2.17-c758a686/ports/sysdeps/aarch64/Versions 1969-12-31 19:00:00.000000000 -0500
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+++ glibc-2.17-c758a686/ports/sysdeps/aarch64/Versions 2014-03-27 11:54:54.435418262 -0400
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@@ -0,0 +1,5 @@
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+libc {
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+ GLIBC_2.18 {
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+ _mcount;
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+ }
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+}
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diff -ruNp glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist
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--- glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist 2012-12-24 22:02:13.000000000 -0500
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+++ glibc-2.17-c758a686/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist 2014-03-27 11:54:54.495412015 -0400
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@@ -2077,3 +2077,6 @@ GLIBC_2.17
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xencrypt F
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xprt_register F
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xprt_unregister F
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+GLIBC_2.18
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+ GLIBC_2.18 A
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+ _mcount F
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diff -ruNp glibc-2.17-c758a686/Versions.def glibc-2.17-c758a686/Versions.def
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--- glibc-2.17-c758a686/Versions.def 2012-12-24 22:02:13.000000000 -0500
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+++ glibc-2.17-c758a686/Versions.def 2014-03-27 11:54:54.535407851 -0400
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@@ -34,6 +34,7 @@ libc {
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GLIBC_2.15
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GLIBC_2.16
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GLIBC_2.17
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+ GLIBC_2.18
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HURD_CTHREADS_0.3
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%ifdef EXPORT_UNWIND_FIND_FDE
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GCC_3.0
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