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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [i386/] [cygming-crtbegin.c] - Rev 301
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/* crtbegin object for windows32 targets. Copyright (C) 2007, 2009 Free Software Foundation, Inc. Contributed by Danny Smith <dannysmith@users.sourceforge.net> This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ /* Target machine header files require this define. */ #define IN_LIBGCC2 #include "auto-host.h" #include "tconfig.h" #include "tsystem.h" #include "coretypes.h" #include "tm.h" #include "unwind-dw2-fde.h" #define WIN32_LEAN_AND_MEAN #include <windows.h> #ifndef LIBGCC_SONAME #define LIBGCC_SONAME "libgcc_s.dll" #endif #ifndef LIBGCJ_SONAME #define LIBGCJ_SONAME "libgcj_s.dll" #endif /* Make the declarations weak. This is critical for _Jv_RegisterClasses because it lives in libgcj.a */ extern void __register_frame_info (const void *, struct object *) TARGET_ATTRIBUTE_WEAK; extern void *__deregister_frame_info (const void *) TARGET_ATTRIBUTE_WEAK; extern void _Jv_RegisterClasses (const void *) TARGET_ATTRIBUTE_WEAK; #if defined(HAVE_LD_RO_RW_SECTION_MIXING) # define EH_FRAME_SECTION_CONST const #else # define EH_FRAME_SECTION_CONST #endif /* Stick a label at the beginning of the frame unwind info so we can register/deregister it with the exception handling library code. */ #if DWARF2_UNWIND_INFO static EH_FRAME_SECTION_CONST char __EH_FRAME_BEGIN__[] __attribute__((section(EH_FRAME_SECTION_NAME), aligned(4))) = { }; static struct object obj; #endif #if TARGET_USE_JCR_SECTION static void *__JCR_LIST__[] __attribute__ ((unused, section(JCR_SECTION_NAME), aligned(4))) = { }; #endif /* Pull in references from libgcc.a(unwind-dw2-fde.o) in the startfile. These are referenced by a ctor and dtor in crtend.o. */ extern void __gcc_register_frame (void); extern void __gcc_deregister_frame (void); void __gcc_register_frame (void) { #if DWARF2_UNWIND_INFO /* Weak undefined symbols won't be pulled in from dlls; hence we first test if the dll is already loaded and, if so, get the symbol's address at run-time. If the dll is not loaded, fallback to weak linkage to static archive. */ void (*register_frame_fn) (const void *, struct object *); HANDLE h = GetModuleHandle (LIBGCC_SONAME); if (h) register_frame_fn = (void (*) (const void *, struct object *)) GetProcAddress (h, "__register_frame_info"); else register_frame_fn = __register_frame_info; if (register_frame_fn) register_frame_fn (__EH_FRAME_BEGIN__, &obj); #endif #if TARGET_USE_JCR_SECTION if (__JCR_LIST__[0]) { void (*register_class_fn) (const void *); HANDLE h = GetModuleHandle (LIBGCJ_SONAME); if (h) register_class_fn = (void (*) (const void *)) GetProcAddress (h, "_Jv_RegisterClasses"); else register_class_fn = _Jv_RegisterClasses; if (register_class_fn) register_class_fn (__JCR_LIST__); } #endif } void __gcc_deregister_frame (void) { #if DWARF2_UNWIND_INFO void * (*deregister_frame_fn) (const void *); HANDLE h = GetModuleHandle (LIBGCC_SONAME); if (h) deregister_frame_fn = (void* (*) (const void *)) GetProcAddress (h, "__deregister_frame_info"); else deregister_frame_fn = __deregister_frame_info; if (deregister_frame_fn) deregister_frame_fn (__EH_FRAME_BEGIN__); #endif }
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