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/* Frv initialization file linked before all user modules
Copyright (C) 1999-2020 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 <stddef.h>
#include "../libgcc/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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