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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [frv/] [frvbegin.c] - Rev 438
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/* Frv initialization file linked before all user modules Copyright (C) 1999, 2000, 2003, 2004, 2009 Free Software Foundation, Inc. Contributed by Red Hat, Inc. 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/>. This file was originally taken from the file crtstuff.c in the main compiler directory, and simplified. */ #include "defaults.h" #include <stddef.h> #include "unwind-dw2-fde.h" #include "gbl-ctors.h" /* Declare a pointer to void function type. */ #define STATIC static #ifdef __FRV_UNDERSCORE__ #define UNDERSCORE "_" #else #define UNDERSCORE "" #endif #define INIT_SECTION_NEG_ONE(SECTION, FLAGS, NAME) \ __asm__ (".section " SECTION "," FLAGS "\n\t" \ ".globl " UNDERSCORE NAME "\n\t" \ ".type " UNDERSCORE NAME ",@object\n\t" \ ".p2align 2\n" \ UNDERSCORE NAME ":\n\t" \ ".word -1\n\t" \ ".previous") #define INIT_SECTION(SECTION, FLAGS, NAME) \ __asm__ (".section " SECTION "," FLAGS "\n\t" \ ".globl " UNDERSCORE NAME "\n\t" \ ".type " UNDERSCORE NAME ",@object\n\t" \ ".p2align 2\n" \ UNDERSCORE NAME ":\n\t" \ ".previous") /* Beginning of .ctor/.dtor sections that provides a list of constructors and destructors to run. */ INIT_SECTION_NEG_ONE (".ctors", "\"aw\"", "__CTOR_LIST__"); INIT_SECTION_NEG_ONE (".dtors", "\"aw\"", "__DTOR_LIST__"); /* Beginning of .eh_frame section that provides all of the exception handling tables. */ INIT_SECTION (".eh_frame", "\"aw\"", "__EH_FRAME_BEGIN__"); #if ! __FRV_FDPIC__ /* In FDPIC, the linker itself generates this. */ /* Beginning of .rofixup section that provides a list of pointers that we need to adjust. */ INIT_SECTION (".rofixup", "\"a\"", "__ROFIXUP_LIST__"); #endif /* __FRV_FDPIC__ */ extern void __frv_register_eh(void) __attribute__((__constructor__)); extern void __frv_deregister_eh(void) __attribute__((__destructor__)); extern func_ptr __EH_FRAME_BEGIN__[]; /* Register the exception handling table as the first constructor. */ void __frv_register_eh (void) { static struct object object; if (__register_frame_info) __register_frame_info (__EH_FRAME_BEGIN__, &object); } /* Note, do not declare __{,de}register_frame_info weak as it seems to interfere with the pic support. */ /* Unregister the exception handling table as a deconstructor. */ void __frv_deregister_eh (void) { static int completed = 0; if (completed) return; if (__deregister_frame_info) __deregister_frame_info (__EH_FRAME_BEGIN__); completed = 1; } /* Run the global destructors. */ void __do_global_dtors (void) { static func_ptr *p = __DTOR_LIST__ + 1; while (*p) { p++; (*(p-1)) (); } } /* Run the global constructors. */ void __do_global_ctors (void) { unsigned long nptrs = (unsigned long) __CTOR_LIST__[0]; unsigned i; if (nptrs == (unsigned long)-1) for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); for (i = nptrs; i >= 1; i--) __CTOR_LIST__[i] (); atexit (__do_global_dtors); } /* Subroutine called automatically by `main'. Compiling a global function named `main' produces an automatic call to this function at the beginning. For many systems, this routine calls __do_global_ctors. For systems which support a .init section we use the .init section to run __do_global_ctors, so we need not do anything here. */ void __main (void) { /* Support recursive calls to `main': run initializers just once. */ static int initialized; if (! initialized) { initialized = 1; __do_global_ctors (); } }
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