1 /* Frv initialization file linked before all user modules
2 Copyright (C) 1999, 2000, 2003, 2004, 2009 Free Software Foundation, Inc.
3 Contributed by Red Hat, Inc.
5 This file is part of GCC.
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)
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.
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.
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/>.
26 This file was originally taken from the file crtstuff.c in the
27 main compiler directory, and simplified. */
31 #include "unwind-dw2-fde.h"
32 #include "gbl-ctors.h"
34 /* Declare a pointer to void function type. */
37 #ifdef __FRV_UNDERSCORE__
38 #define UNDERSCORE "_"
43 #define INIT_SECTION_NEG_ONE(SECTION, FLAGS, NAME) \
44 __asm__ (".section " SECTION "," FLAGS "\n\t" \
45 ".globl " UNDERSCORE NAME "\n\t" \
46 ".type " UNDERSCORE NAME ",@object\n\t" \
48 UNDERSCORE NAME ":\n\t" \
52 #define INIT_SECTION(SECTION, FLAGS, NAME) \
53 __asm__ (".section " SECTION "," FLAGS "\n\t" \
54 ".globl " UNDERSCORE NAME "\n\t" \
55 ".type " UNDERSCORE NAME ",@object\n\t" \
57 UNDERSCORE NAME ":\n\t" \
60 /* Beginning of .ctor/.dtor sections that provides a list of constructors and
61 destructors to run. */
63 INIT_SECTION_NEG_ONE (".ctors", "\"aw\"", "__CTOR_LIST__");
64 INIT_SECTION_NEG_ONE (".dtors", "\"aw\"", "__DTOR_LIST__");
66 /* Beginning of .eh_frame section that provides all of the exception handling
69 INIT_SECTION (".eh_frame", "\"aw\"", "__EH_FRAME_BEGIN__");
72 /* In FDPIC, the linker itself generates this. */
73 /* Beginning of .rofixup section that provides a list of pointers that we
76 INIT_SECTION (".rofixup", "\"a\"", "__ROFIXUP_LIST__");
77 #endif /* __FRV_FDPIC__ */
79 extern void __frv_register_eh(void) __attribute__((__constructor__));
80 extern void __frv_deregister_eh(void) __attribute__((__destructor__));
82 extern func_ptr __EH_FRAME_BEGIN__[];
84 /* Register the exception handling table as the first constructor. */
86 __frv_register_eh (void)
88 static struct object object;
89 if (__register_frame_info)
90 __register_frame_info (__EH_FRAME_BEGIN__, &object);
93 /* Note, do not declare __{,de}register_frame_info weak as it seems
94 to interfere with the pic support. */
96 /* Unregister the exception handling table as a deconstructor. */
98 __frv_deregister_eh (void)
100 static int completed = 0;
105 if (__deregister_frame_info)
106 __deregister_frame_info (__EH_FRAME_BEGIN__);
111 /* Run the global destructors. */
113 __do_global_dtors (void)
115 static func_ptr *p = __DTOR_LIST__ + 1;
123 /* Run the global constructors. */
125 __do_global_ctors (void)
127 unsigned long nptrs = (unsigned long) __CTOR_LIST__[0];
130 if (nptrs == (unsigned long)-1)
131 for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++);
133 for (i = nptrs; i >= 1; i--)
136 atexit (__do_global_dtors);
139 /* Subroutine called automatically by `main'.
140 Compiling a global function named `main'
141 produces an automatic call to this function at the beginning.
143 For many systems, this routine calls __do_global_ctors.
144 For systems which support a .init section we use the .init section
145 to run __do_global_ctors, so we need not do anything here. */
150 /* Support recursive calls to `main': run initializers just once. */
151 static int initialized;
155 __do_global_ctors ();