157 lines
4.4 KiB
C
157 lines
4.4 KiB
C
/* Frv initialization file linked before all user modules
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Copyright (C) 1999-2019 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of GCC.
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GCC is free software ; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY ; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>.
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This file was originally taken from the file crtstuff.c in the
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main compiler directory, and simplified. */
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#include <stddef.h>
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#include "../libgcc/unwind-dw2-fde.h"
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#include "gbl-ctors.h"
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/* Declare a pointer to void function type. */
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#define STATIC static
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#ifdef __FRV_UNDERSCORE__
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#define UNDERSCORE "_"
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#else
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#define UNDERSCORE ""
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#endif
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#define INIT_SECTION_NEG_ONE(SECTION, FLAGS, NAME) \
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__asm__ (".section " SECTION "," FLAGS "\n\t" \
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".globl " UNDERSCORE NAME "\n\t" \
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".type " UNDERSCORE NAME ",@object\n\t" \
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".p2align 2\n" \
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UNDERSCORE NAME ":\n\t" \
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".word -1\n\t" \
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".previous")
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#define INIT_SECTION(SECTION, FLAGS, NAME) \
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__asm__ (".section " SECTION "," FLAGS "\n\t" \
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".globl " UNDERSCORE NAME "\n\t" \
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".type " UNDERSCORE NAME ",@object\n\t" \
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".p2align 2\n" \
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UNDERSCORE NAME ":\n\t" \
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".previous")
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/* Beginning of .ctor/.dtor sections that provides a list of constructors and
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destructors to run. */
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INIT_SECTION_NEG_ONE (".ctors", "\"aw\"", "__CTOR_LIST__");
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INIT_SECTION_NEG_ONE (".dtors", "\"aw\"", "__DTOR_LIST__");
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/* Beginning of .eh_frame section that provides all of the exception handling
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tables. */
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INIT_SECTION (".eh_frame", "\"aw\"", "__EH_FRAME_BEGIN__");
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#if ! __FRV_FDPIC__
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/* In FDPIC, the linker itself generates this. */
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/* Beginning of .rofixup section that provides a list of pointers that we
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need to adjust. */
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INIT_SECTION (".rofixup", "\"a\"", "__ROFIXUP_LIST__");
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#endif /* __FRV_FDPIC__ */
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extern void __frv_register_eh(void) __attribute__((__constructor__));
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extern void __frv_deregister_eh(void) __attribute__((__destructor__));
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extern func_ptr __EH_FRAME_BEGIN__[];
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/* Register the exception handling table as the first constructor. */
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void
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__frv_register_eh (void)
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{
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static struct object object;
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if (__register_frame_info)
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__register_frame_info (__EH_FRAME_BEGIN__, &object);
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}
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/* Note, do not declare __{,de}register_frame_info weak as it seems
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to interfere with the pic support. */
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/* Unregister the exception handling table as a deconstructor. */
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void
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__frv_deregister_eh (void)
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{
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static int completed = 0;
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if (completed)
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return;
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if (__deregister_frame_info)
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__deregister_frame_info (__EH_FRAME_BEGIN__);
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completed = 1;
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}
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/* Run the global destructors. */
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void
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__do_global_dtors (void)
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{
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static func_ptr *p = __DTOR_LIST__ + 1;
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while (*p)
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{
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p++;
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(*(p-1)) ();
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}
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}
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/* Run the global constructors. */
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void
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__do_global_ctors (void)
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{
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unsigned long nptrs = (unsigned long) __CTOR_LIST__[0];
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unsigned i;
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if (nptrs == (unsigned long)-1)
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for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++);
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for (i = nptrs; i >= 1; i--)
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__CTOR_LIST__[i] ();
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atexit (__do_global_dtors);
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}
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/* Subroutine called automatically by `main'.
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Compiling a global function named `main'
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produces an automatic call to this function at the beginning.
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For many systems, this routine calls __do_global_ctors.
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For systems which support a .init section we use the .init section
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to run __do_global_ctors, so we need not do anything here. */
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void
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__main (void)
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{
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/* Support recursive calls to `main': run initializers just once. */
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static int initialized;
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if (! initialized)
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{
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initialized = 1;
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__do_global_ctors ();
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}
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}
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