diff options
Diffstat (limited to 'bits/dlfcn.h')
| -rw-r--r-- | bits/dlfcn.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/bits/dlfcn.h b/bits/dlfcn.h index f5983d706c..99d544859f 100644 --- a/bits/dlfcn.h +++ b/bits/dlfcn.h @@ -1,5 +1,5 @@ /* System dependent definitions for run-time dynamic loading. - Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999, 2000 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 @@ -35,3 +35,21 @@ The implementation does this by default and so we can define the value to zero. */ #define RTLD_LOCAL 0 + +#ifdef __USE_GNU +/* To support profiling of shared objects it is a good idea to call + the function found using `dlsym' using the following macro since + these calls do not use the PLT. But this would mean the dynamic + loader has no chance to find out when the function is called. The + macro applies the necessary magic so that profiling is possible. + Rewrite + foo = (*fctp) (arg1, arg2); + into + foo = DL_CALL_FCT (fctp, (arg1, arg2)); +*/ +# define DL_CALL_FCT(fctp, args) \ + (_dl_mcount_wrapper_check (fctp), (*(fctp)) args) + +/* This function calls the profiling functions. */ +extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW; +#endif |