/* Machine-dependent definitions for profiling support. Generic GCC 2 version. Copyright (C) 1996, 1997 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* 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> #ifndef NO_UNDERSCORES /* The asm symbols for C functions are `_function'. The canonical name for the counter function is `mcount', no _. */ void _mcount (void) asm ("mcount"); #else /* 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) #endif 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) __builtin_return_address (1), \ (u_long) __builtin_return_address (0)); \ }