| /* Machine-dependent definitions for profiling support. Generic GCC 2 version. |
| Copyright (C) 1996-2016 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)); \ |
| } |