1/* Frv initialization file linked before all user modules 2 Copyright (C) 1999-2020 Free Software Foundation, Inc. 3 Contributed by Red Hat, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software ; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY ; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. 25 26 This file was originally taken from the file crtstuff.c in the 27 main compiler directory, and simplified. */ 28 29#include <stddef.h> 30#include "../libgcc/unwind-dw2-fde.h" 31#include "gbl-ctors.h" 32 33/* Declare a pointer to void function type. */ 34#define STATIC static 35 36#ifdef __FRV_UNDERSCORE__ 37#define UNDERSCORE "_" 38#else 39#define UNDERSCORE "" 40#endif 41 42#define INIT_SECTION_NEG_ONE(SECTION, FLAGS, NAME) \ 43__asm__ (".section " SECTION "," FLAGS "\n\t" \ 44 ".globl " UNDERSCORE NAME "\n\t" \ 45 ".type " UNDERSCORE NAME ",@object\n\t" \ 46 ".p2align 2\n" \ 47 UNDERSCORE NAME ":\n\t" \ 48 ".word -1\n\t" \ 49 ".previous") 50 51#define INIT_SECTION(SECTION, FLAGS, NAME) \ 52__asm__ (".section " SECTION "," FLAGS "\n\t" \ 53 ".globl " UNDERSCORE NAME "\n\t" \ 54 ".type " UNDERSCORE NAME ",@object\n\t" \ 55 ".p2align 2\n" \ 56 UNDERSCORE NAME ":\n\t" \ 57 ".previous") 58 59/* Beginning of .ctor/.dtor sections that provides a list of constructors and 60 destructors to run. */ 61 62INIT_SECTION_NEG_ONE (".ctors", "\"a\"", "__CTOR_LIST__"); 63INIT_SECTION_NEG_ONE (".dtors", "\"a\"", "__DTOR_LIST__"); 64 65/* Beginning of .eh_frame section that provides all of the exception handling 66 tables. */ 67 68INIT_SECTION (".eh_frame", "\"aw\"", "__EH_FRAME_BEGIN__"); 69 70#if ! __FRV_FDPIC__ 71/* In FDPIC, the linker itself generates this. */ 72/* Beginning of .rofixup section that provides a list of pointers that we 73 need to adjust. */ 74 75INIT_SECTION (".rofixup", "\"a\"", "__ROFIXUP_LIST__"); 76#endif /* __FRV_FDPIC__ */ 77 78extern void __frv_register_eh(void) __attribute__((__constructor__)); 79extern void __frv_deregister_eh(void) __attribute__((__destructor__)); 80 81extern func_ptr __EH_FRAME_BEGIN__[]; 82 83/* Register the exception handling table as the first constructor. */ 84void 85__frv_register_eh (void) 86{ 87 static struct object object; 88 if (__register_frame_info) 89 __register_frame_info (__EH_FRAME_BEGIN__, &object); 90} 91 92/* Note, do not declare __{,de}register_frame_info weak as it seems 93 to interfere with the pic support. */ 94 95/* Unregister the exception handling table as a deconstructor. */ 96void 97__frv_deregister_eh (void) 98{ 99 static int completed = 0; 100 101 if (completed) 102 return; 103 104 if (__deregister_frame_info) 105 __deregister_frame_info (__EH_FRAME_BEGIN__); 106 107 completed = 1; 108} 109 110/* Run the global destructors. */ 111void 112__do_global_dtors (void) 113{ 114 static func_ptr *p = __DTOR_LIST__ + 1; 115 while (*p) 116 { 117 p++; 118 (*(p-1)) (); 119 } 120} 121 122/* Run the global constructors. */ 123void 124__do_global_ctors (void) 125{ 126 unsigned long nptrs = (unsigned long) __CTOR_LIST__[0]; 127 unsigned i; 128 129 if (nptrs == (unsigned long)-1) 130 for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); 131 132 for (i = nptrs; i >= 1; i--) 133 __CTOR_LIST__[i] (); 134 135 atexit (__do_global_dtors); 136} 137 138/* Subroutine called automatically by `main'. 139 Compiling a global function named `main' 140 produces an automatic call to this function at the beginning. 141 142 For many systems, this routine calls __do_global_ctors. 143 For systems which support a .init section we use the .init section 144 to run __do_global_ctors, so we need not do anything here. */ 145 146void 147__main (void) 148{ 149 /* Support recursive calls to `main': run initializers just once. */ 150 static int initialized; 151 if (! initialized) 152 { 153 initialized = 1; 154 __do_global_ctors (); 155 } 156} 157