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- /* Machine-dependent definitions for profiling support. Generic GCC 2 version.
- Copyright (C) 1996-2019 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. */
- /* Be warned that GCC cannot usefully compile __builtin_return_address(N)
- for N != 0 on all machines. In this case, you may have to write
- your own version of _mcount(). */
- #if __GNUC__ < 2
- #error "This file uses __builtin_return_address, a GCC 2 extension."
- #endif
- #include <sysdep.h>
- /* The canonical name for the function is `_mcount' in both C and asm,
- but some old asm code might assume it's `mcount'. */
- void _mcount (void);
- weak_alias (_mcount, mcount)
- 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)); \
- }
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