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[AArch64] Provide symbol version for _mcount.

This commit is contained in:
Marcus Shawcroft 2013-07-26 08:29:17 +01:00
parent 61a9dcb9d6
commit f8b4877a75
5 changed files with 81 additions and 0 deletions
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7
ports/ChangeLog.aarch64
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2013-07-26 Marcus Shawcroft <marcus.shawcroft@linaro.org>
* sysdeps/aarch64/Versions: New file.
* sysdeps/aarch64/machine-gmon.h: New file.
* sysdeps/aarch64/mcount.c: New file.
* sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist (_mcount): Add.
2013-07-12 Marcus Shawcroft <marcus.shawcroft@linaro.org>
* sysdeps/aarch64/Makefile (CFLAGS-backtrace.c): Define.

5
ports/sysdeps/aarch64/Versions Normal file
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libc {
GLIBC_2.18 {
_mcount;
}
}

35
ports/sysdeps/aarch64/machine-gmon.h Normal file
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/* AArch64 definitions for profiling support.
Copyright (C) 1996-2013 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/>. */
/* GCC version 2 gives us a perfect magical function to get
just the information we need:
void *__builtin_return_address (unsigned int N)
returns the return address of the frame N frames up. */
#include <sysdep.h>
static void mcount_internal (u_long frompc, u_long selfpc);
#define _MCOUNT_DECL(frompc, selfpc) \
static inline void mcount_internal (u_long frompc, u_long selfpc)
#define MCOUNT \
void __mcount (void) \
{ \
mcount_internal ((u_long) RETURN_ADDRESS (1), (u_long) RETURN_ADDRESS (0)); \
}

33
ports/sysdeps/aarch64/mcount.c Normal file
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/* Copyright (C) 2013 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 <shlib-compat.h>
#include <gmon/mcount.c>
/* 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

1
ports/sysdeps/unix/sysv/linux/aarch64/nptl/libc.abilist
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@ -2080,3 +2080,4 @@ GLIBC_2.17
GLIBC_2.18
GLIBC_2.18 A
__cxa_thread_atexit_impl F
_mcount F