1*53ee8cc1Swenshuai.xi /* System dependent definitions for run-time dynamic loading. 2*53ee8cc1Swenshuai.xi Copyright (C) 1996, 1997, 1999, 2000, 2001, 2004 3*53ee8cc1Swenshuai.xi Free Software Foundation, Inc. 4*53ee8cc1Swenshuai.xi This file is part of the GNU C Library. 5*53ee8cc1Swenshuai.xi 6*53ee8cc1Swenshuai.xi The GNU C Library is free software; you can redistribute it and/or 7*53ee8cc1Swenshuai.xi modify it under the terms of the GNU Lesser General Public 8*53ee8cc1Swenshuai.xi License as published by the Free Software Foundation; either 9*53ee8cc1Swenshuai.xi version 2.1 of the License, or (at your option) any later version. 10*53ee8cc1Swenshuai.xi 11*53ee8cc1Swenshuai.xi The GNU C Library is distributed in the hope that it will be useful, 12*53ee8cc1Swenshuai.xi but WITHOUT ANY WARRANTY; without even the implied warranty of 13*53ee8cc1Swenshuai.xi MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14*53ee8cc1Swenshuai.xi Lesser General Public License for more details. 15*53ee8cc1Swenshuai.xi 16*53ee8cc1Swenshuai.xi You should have received a copy of the GNU Lesser General Public 17*53ee8cc1Swenshuai.xi License along with the GNU C Library; if not, write to the Free 18*53ee8cc1Swenshuai.xi Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19*53ee8cc1Swenshuai.xi 02111-1307 USA. */ 20*53ee8cc1Swenshuai.xi 21*53ee8cc1Swenshuai.xi #ifndef _DLFCN_H 22*53ee8cc1Swenshuai.xi # error "Never use <bits/dlfcn.h> directly; include <dlfcn.h> instead." 23*53ee8cc1Swenshuai.xi #endif 24*53ee8cc1Swenshuai.xi 25*53ee8cc1Swenshuai.xi /* The MODE argument to `dlopen' contains one of the following: */ 26*53ee8cc1Swenshuai.xi #define RTLD_LAZY 0x0001 /* Lazy function call binding. */ 27*53ee8cc1Swenshuai.xi #define RTLD_NOW 0x0002 /* Immediate function call binding. */ 28*53ee8cc1Swenshuai.xi #define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */ 29*53ee8cc1Swenshuai.xi #define RTLD_NOLOAD 0x00008 /* Do not load the object. */ 30*53ee8cc1Swenshuai.xi #define RTLD_DEEPBIND 0x00010 /* Use deep binding. */ 31*53ee8cc1Swenshuai.xi 32*53ee8cc1Swenshuai.xi /* If the following bit is set in the MODE argument to `dlopen', 33*53ee8cc1Swenshuai.xi the symbols of the loaded object and its dependencies are made 34*53ee8cc1Swenshuai.xi visible as if the object were linked directly into the program. */ 35*53ee8cc1Swenshuai.xi #define RTLD_GLOBAL 0x0004 36*53ee8cc1Swenshuai.xi 37*53ee8cc1Swenshuai.xi /* Unix98 demands the following flag which is the inverse to RTLD_GLOBAL. 38*53ee8cc1Swenshuai.xi The implementation does this by default and so we can define the 39*53ee8cc1Swenshuai.xi value to zero. */ 40*53ee8cc1Swenshuai.xi #define RTLD_LOCAL 0 41*53ee8cc1Swenshuai.xi 42*53ee8cc1Swenshuai.xi /* Do not delete object when closed. */ 43*53ee8cc1Swenshuai.xi #define RTLD_NODELETE 0x01000 44*53ee8cc1Swenshuai.xi 45*53ee8cc1Swenshuai.xi #ifdef __USE_GNU 46*53ee8cc1Swenshuai.xi /* To support profiling of shared objects it is a good idea to call 47*53ee8cc1Swenshuai.xi the function found using `dlsym' using the following macro since 48*53ee8cc1Swenshuai.xi these calls do not use the PLT. But this would mean the dynamic 49*53ee8cc1Swenshuai.xi loader has no chance to find out when the function is called. The 50*53ee8cc1Swenshuai.xi macro applies the necessary magic so that profiling is possible. 51*53ee8cc1Swenshuai.xi Rewrite 52*53ee8cc1Swenshuai.xi foo = (*fctp) (arg1, arg2); 53*53ee8cc1Swenshuai.xi into 54*53ee8cc1Swenshuai.xi foo = DL_CALL_FCT (fctp, (arg1, arg2)); 55*53ee8cc1Swenshuai.xi */ 56*53ee8cc1Swenshuai.xi # define DL_CALL_FCT(fctp, args) \ 57*53ee8cc1Swenshuai.xi (_dl_mcount_wrapper_check ((void *) (fctp)), (*(fctp)) args) 58*53ee8cc1Swenshuai.xi 59*53ee8cc1Swenshuai.xi __BEGIN_DECLS 60*53ee8cc1Swenshuai.xi 61*53ee8cc1Swenshuai.xi /* This function calls the profiling functions. */ 62*53ee8cc1Swenshuai.xi extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW; 63*53ee8cc1Swenshuai.xi 64*53ee8cc1Swenshuai.xi __END_DECLS 65*53ee8cc1Swenshuai.xi 66*53ee8cc1Swenshuai.xi #endif 67