sysdeps/unix/sysv/linux/arm/profil-counter.h

   1 /* Low-level statistical profiling support function.  Linux/ARM version.
   2    Copyright (C) 1996, 1997, 1998, 2002 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <signal.h>
  21 #include <bits/armsigctx.h>
  22
  23 void
  24 profil_counter (int signo, int _a2, int _a3, int _a4, union k_sigcontext sc)
  25 {
  26   void *pc;
  27   if (sc.v20.magic == SIGCONTEXT_2_0_MAGIC)
  28     pc = (void *) sc.v20.reg.ARM_pc;
  29   else
  30     pc = (void *) sc.v21.arm_pc;
  31   profil_count (pc);
  32
  33   /* This is a hack to prevent the compiler from implementing the
  34      above function call as a sibcall.  The sibcall would overwrite
  35      the signal context.  */
  36   asm volatile ("");
  37 }