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cygming-crtend.c revision 1.1.1.11 
      1 /* crtend object for windows32 targets.
      2    Copyright (C) 2007-2024 Free Software Foundation, Inc.
      3 
      4    Contributed by Danny Smith <dannysmith (at) users.sourceforge.net>
      5 
      6 This file is part of GCC.
      7 
      8 GCC is free software; you can redistribute it and/or modify it under
      9 the terms of the GNU General Public License as published by the Free
     10 Software Foundation; either version 3, or (at your option) any later
     11 version.
     12 
     13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
     14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
     15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     16 for more details.
     17 
     18 Under Section 7 of GPL version 3, you are granted additional
     19 permissions described in the GCC Runtime Library Exception, version
     20 3.1, as published by the Free Software Foundation.
     21 
     22 You should have received a copy of the GNU General Public License and
     23 a copy of the GCC Runtime Library Exception along with this program;
     24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     25 <http://www.gnu.org/licenses/>.  */
     26 
     27 /* Target machine header files require this define. */
     28 #define IN_LIBGCC2
     29 
     30 /* auto-host.h is needed by cygming.h for HAVE_GAS_WEAK and here
     31    for HAVE_LD_RO_RW_SECTION_MIXING.  */
     32 #include "auto-host.h"
     33 #include "tconfig.h"
     34 #include "tsystem.h"
     35 #include "coretypes.h"
     36 #include "tm.h"
     37 #include "libgcc_tm.h"
     38 #include "unwind-dw2-fde.h"
     39 
     40 #if defined(HAVE_LD_RO_RW_SECTION_MIXING)
     41 # define EH_FRAME_SECTION_CONST const
     42 #else
     43 # define EH_FRAME_SECTION_CONST
     44 #endif
     45 
     46 #if DWARF2_UNWIND_INFO
     47 /* Terminate the frame unwind info section with a 0 as a sentinel;
     48    this would be the 'length' field in a real FDE.  */
     49 
     50 static EH_FRAME_SECTION_CONST int __FRAME_END__[]
     51   __attribute__ ((used,  section(__LIBGCC_EH_FRAME_SECTION_NAME__),
     52 		  aligned(4)))
     53   = { 0 };
     54 #endif
     55 
     56 extern void __gcc_register_frame (void);
     57 extern void __gcc_deregister_frame (void);
     58 
     59 #pragma GCC diagnostic push
     60 #pragma GCC diagnostic ignored "-Wprio-ctor-dtor"
     61 static void register_frame_ctor (void) __attribute__ ((constructor (0)));
     62 #pragma GCC diagnostic pop
     63 
     64 static void
     65 register_frame_ctor (void)
     66 {
     67   __gcc_register_frame ();
     68 }
     69 
     70 #if !DEFAULT_USE_CXA_ATEXIT
     71 #pragma GCC diagnostic push
     72 #pragma GCC diagnostic ignored "-Wprio-ctor-dtor"
     73 static void deregister_frame_dtor (void) __attribute__ ((destructor (0)));
     74 #pragma GCC diagnostic pop
     75 
     76 static void
     77 deregister_frame_dtor (void)
     78 {
     79   __gcc_deregister_frame ();
     80 }
     81 #endif
     82