/* Initializer module for building the ELF shared C library. This file and sofini.c do the work normally done by crtbeginS.o and crtendS.o, to wrap the `.ctors' and `.dtors' sections so the lists are terminated, and calling those lists of functions. */ #include <libc-internal.h> #include <stdlib.h> #ifdef HAVE_DWARF2_UNWIND_INFO_STATIC # include <gccframe.h> #endif static void (*const __CTOR_LIST__[1]) (void) __attribute__ ((section (".ctors"))) = { (void (*) (void)) -1 }; static void (*const __DTOR_LIST__[1]) (void) __attribute__ ((section (".dtors"))) = { (void (*) (void)) -1 }; static inline void run_hooks (void (*const list[]) (void)) { while (*++list) (**list) (); } #ifdef HAVE_DWARF2_UNWIND_INFO static char __EH_FRAME_BEGIN__[] __attribute__ ((section (".eh_frame"))) = { }; # ifdef HAVE_DWARF2_UNWIND_INFO_STATIC extern void __register_frame_info (const void *, struct object *); extern void __register_frame_info_bases (const void *, struct object *, void *, void *); extern void __deregister_frame_info (const void *); extern void __deregister_frame_info_bases (const void *); # else extern void __register_frame (const void *); extern void __deregister_frame (const void *); # endif #endif /* This function will be called from _init in init-first.c. */ void __libc_global_ctors (void) { /* Call constructor functions. */ run_hooks (__CTOR_LIST__); #ifdef HAVE_DWARF2_UNWIND_INFO # ifdef HAVE_DWARF2_UNWIND_INFO_STATIC { static struct object ob; # if defined CRT_GET_RFIB_TEXT || defined CRT_GET_RFIB_DATA void *tbase, *dbase; # ifdef CRT_GET_RFIB_TEXT CRT_GET_RFIB_TEXT (tbase); # else tbase = NULL; # endif # ifdef CRT_GET_RFIB_DATA CRT_GET_RFIB_DATA (dbase); # else dbase = NULL; # endif __register_frame_info_bases (__EH_FRAME_BEGIN__, &ob, tbase, dbase); # else __register_frame_info (__EH_FRAME_BEGIN__, &ob); # endif } # else __register_frame (__EH_FRAME_BEGIN__); # endif #endif } /* This function becomes the DT_FINI termination function for the C library. */ void _fini (void) __attribute__ ((section (".fini"))); /* Just for kicks. */ void _fini (void) { /* Call destructor functions. */ run_hooks (__DTOR_LIST__); #ifdef HAVE_DWARF2_UNWIND_INFO # ifdef HAVE_DWARF2_UNWIND_INFO_STATIC # if defined CRT_GET_RFIB_TEXT || defined CRT_GET_RFIB_DATA __deregister_frame_info_bases (__EH_FRAME_BEGIN__); # else __deregister_frame_info (__EH_FRAME_BEGIN__); # endif # else __deregister_frame (__EH_FRAME_BEGIN__); # endif #endif }