Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | /* Machine-dependent definitions for profiling support. Generic GCC 2 version. |
|---|---|
| 2 | Copyright (C) 1996-2022 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | /* GCC version 2 gives us a perfect magical function to get |
| 20 | just the information we need: |
| 21 | void *__builtin_return_address (unsigned int N) |
| 22 | returns the return address of the frame N frames up. */ |
| 23 | |
| 24 | /* Be warned that GCC cannot usefully compile __builtin_return_address(N) |
| 25 | for N != 0 on all machines. In this case, you may have to write |
| 26 | your own version of _mcount(). */ |
| 27 | |
| 28 | #if __GNUC__ < 2 |
| 29 | #error "This file uses __builtin_return_address, a GCC 2 extension." |
| 30 | #endif |
| 31 | |
| 32 | #include <sysdep.h> |
| 33 | /* The canonical name for the function is `_mcount' in both C and asm, |
| 34 | but some old asm code might assume it's `mcount'. */ |
| 35 | void _mcount (void); |
| 36 | weak_alias (_mcount, mcount) |
| 37 | |
| 38 | static void mcount_internal (u_long frompc, u_long selfpc); |
| 39 | |
| 40 | #define _MCOUNT_DECL(frompc, selfpc) \ |
| 41 | static inline void mcount_internal (u_long frompc, u_long selfpc) |
| 42 | |
| 43 | #define MCOUNT \ |
| 44 | void _mcount (void) \ |
| 45 | { \ |
| 46 | mcount_internal ((u_long) RETURN_ADDRESS (1), (u_long) RETURN_ADDRESS (0)); \ |
| 47 | } |
| 48 |
Warning: This file is not a C or C++ file. It does not have highlighting.