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/* 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)); \
}
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