sysdeps/arm/machine-gmon.h

   1 /* Machine-dependent definitions for profiling support.  ARM version.
   2    Copyright (C) 1996, 1997 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 /* GCC for the ARM cannot compile __builtin_return_address(N) for N != 0,
  21    so we must use an assembly stub.  */
  22
  23 #include <sysdep.h>
  24 #ifndef NO_UNDERSCORES
  25 /* The asm symbols for C functions are `_function'.
  26    The canonical name for the counter function is `mcount', no _.  */
  27 void _mcount (void) asm ("mcount");
  28 #else
  29 /* The canonical name for the function is `_mcount' in both C and asm,
  30    but some old asm code might assume it's `mcount'.  */
  31 void _mcount (void);
  32 weak_alias (_mcount, mcount)
  33 #endif
  34
  35 static void mcount_internal (u_long frompc, u_long selfpc);
  36
  37 #define _MCOUNT_DECL(frompc, selfpc) \
  38 static void mcount_internal (u_long frompc, u_long selfpc)
  39
  40 #define MCOUNT \
  41 void _mcount (void)                                                           \
  42 {                                                                             \
  43   register unsigned long int frompc, selfpc;                                  \
  44   __asm__("movs fp, fp; "                                                     \
  45           "moveq %0, $0; "                                                    \
  46           "ldrne %0, [fp, $-4]; "                                             \
  47           "ldrne %1, [fp, $-12]; "                                            \
  48           "movnes %1, %1; "                                                   \
  49           "ldrne %1, [%1, $-4]; "                                             \
  50           : "=g" (selfpc), "=g" (frompc)                                      \
  51           : : "cc"                                                            \
  52           );                                                                  \
  53   if (selfpc)                                                                 \
  54     mcount_internal(frompc, selfpc);                                          \
  55 }