machine-gmon.h 2.1 KB

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  1. /* Machine-dependent definitions for profiling support. Generic GCC 2 version.
  2. Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. /* GCC version 2 gives us a perfect magical function to get
  17. just the information we need:
  18. void *__builtin_return_address (unsigned int N)
  19. returns the return address of the frame N frames up. */
  20. /* Be warned that GCC cannot usefully compile __builtin_return_address(N)
  21. for N != 0 on all machines. In this case, you may have to write
  22. your own version of _mcount(). */
  23. #if __GNUC__ < 2
  24. #error "This file uses __builtin_return_address, a GCC 2 extension."
  25. #endif
  26. #include <sysdep.h>
  27. #ifndef NO_UNDERSCORES
  28. /* The asm symbols for C functions are `_function'.
  29. The canonical name for the counter function is `mcount', no _. */
  30. void _mcount (void) asm ("mcount");
  31. #else
  32. /* The canonical name for the function is `_mcount' in both C and asm,
  33. but some old asm code might assume it's `mcount'. */
  34. void _mcount (void);
  35. weak_alias (_mcount, mcount)
  36. #endif
  37. static void mcount_internal (u_long frompc, u_long selfpc);
  38. #define _MCOUNT_DECL(frompc, selfpc) \
  39. static inline void mcount_internal (u_long frompc, u_long selfpc)
  40. #define MCOUNT \
  41. void _mcount (void) \
  42. { \
  43. mcount_internal ((u_long) RETURN_ADDRESS (1), (u_long) RETURN_ADDRESS (0)); \
  44. }