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-rw-r--r--gcc-4.9/libgcc/crtstuff.c761
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diff --git a/gcc-4.9/libgcc/crtstuff.c b/gcc-4.9/libgcc/crtstuff.c
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+++ b/gcc-4.9/libgcc/crtstuff.c
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+/* Specialized bits of code needed to support construction and
+ destruction of file-scope objects in C++ code.
+ Copyright (C) 1991-2014 Free Software Foundation, Inc.
+ Contributed by Ron Guilmette (rfg@monkeys.com).
+
+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 is a bit like libgcc2.c in that it is compiled
+ multiple times and yields multiple .o files.
+
+ This file is useful on target machines where the object file format
+ supports multiple "user-defined" sections (e.g. COFF, ELF, ROSE). On
+ such systems, this file allows us to avoid running collect (or any
+ other such slow and painful kludge). Additionally, if the target
+ system supports a .init section, this file allows us to support the
+ linking of C++ code with a non-C++ main program.
+
+ Note that if INIT_SECTION_ASM_OP is defined in the tm.h file, then
+ this file *will* make use of the .init section. If that symbol is
+ not defined however, then the .init section will not be used.
+
+ Currently, only ELF and COFF are supported. It is likely however that
+ ROSE could also be supported, if someone was willing to do the work to
+ make whatever (small?) adaptations are needed. (Some work may be
+ needed on the ROSE assembler and linker also.)
+
+ This file must be compiled with gcc. */
+
+/* Target machine header files require this define. */
+#define IN_LIBGCC2
+
+/* FIXME: Including auto-host is incorrect, but until we have
+ identified the set of defines that need to go into auto-target.h,
+ this will have to do. */
+#include "auto-host.h"
+#undef pid_t
+#undef rlim_t
+#undef ssize_t
+#undef vfork
+#include "tconfig.h"
+#include "tsystem.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "libgcc_tm.h"
+#include "unwind-dw2-fde.h"
+
+#ifndef FORCE_CODE_SECTION_ALIGN
+# define FORCE_CODE_SECTION_ALIGN
+#endif
+
+#ifndef CRT_CALL_STATIC_FUNCTION
+# define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
+static void __attribute__((__used__)) \
+call_ ## FUNC (void) \
+{ \
+ asm (SECTION_OP); \
+ FUNC (); \
+ FORCE_CODE_SECTION_ALIGN \
+ asm (TEXT_SECTION_ASM_OP); \
+}
+#endif
+
+#if defined(OBJECT_FORMAT_ELF) \
+ && !defined(OBJECT_FORMAT_FLAT) \
+ && defined(HAVE_LD_EH_FRAME_HDR) \
+ && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
+ && defined(__FreeBSD__) && __FreeBSD__ >= 7
+#include <link.h>
+# define USE_PT_GNU_EH_FRAME
+#endif
+
+#if defined(OBJECT_FORMAT_ELF) \
+ && !defined(OBJECT_FORMAT_FLAT) \
+ && defined(HAVE_LD_EH_FRAME_HDR) && defined(TARGET_DL_ITERATE_PHDR) \
+ && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
+ && defined(__sun__) && defined(__svr4__)
+#include <link.h>
+# define USE_PT_GNU_EH_FRAME
+#endif
+
+#if defined(OBJECT_FORMAT_ELF) \
+ && !defined(OBJECT_FORMAT_FLAT) \
+ && defined(HAVE_LD_EH_FRAME_HDR) \
+ && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
+ && defined(__GLIBC__) && __GLIBC__ >= 2
+#include <link.h>
+/* uClibc pretends to be glibc 2.2 and DT_CONFIG is defined in its link.h.
+ But it doesn't use PT_GNU_EH_FRAME ELF segment currently. */
+# if !defined(__UCLIBC__) \
+ && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
+ || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
+# define USE_PT_GNU_EH_FRAME
+# endif
+#endif
+
+#if defined(OBJECT_FORMAT_ELF) \
+ && !defined(OBJECT_FORMAT_FLAT) \
+ && defined(HAVE_LD_EH_FRAME_HDR) \
+ && !defined(CRTSTUFFT_O) \
+ && defined(inhibit_libc) \
+ && (defined(__GLIBC__) || defined(__gnu_linux__) || defined(__GNU__))
+/* On systems using glibc, an inhibit_libc build of libgcc is only
+ part of a bootstrap process. Build the same crt*.o as would be
+ built with headers present, so that it is not necessary to build
+ glibc more than once for the bootstrap to converge. */
+# define USE_PT_GNU_EH_FRAME
+#endif
+
+#if defined(EH_FRAME_SECTION_NAME) && !defined(USE_PT_GNU_EH_FRAME)
+# define USE_EH_FRAME_REGISTRY
+#endif
+#if defined(EH_FRAME_SECTION_NAME) && EH_TABLES_CAN_BE_READ_ONLY
+# define EH_FRAME_SECTION_CONST const
+#else
+# define EH_FRAME_SECTION_CONST
+#endif
+
+#if !defined(DTOR_LIST_END) && defined(OBJECT_FORMAT_ELF) \
+ && defined(HAVE_GAS_HIDDEN) && !defined(FINI_ARRAY_SECTION_ASM_OP)
+# define HIDDEN_DTOR_LIST_END
+#endif
+
+#if !defined(USE_TM_CLONE_REGISTRY) && defined(OBJECT_FORMAT_ELF)
+# define USE_TM_CLONE_REGISTRY 1
+#endif
+
+/* We do not want to add the weak attribute to the declarations of these
+ routines in unwind-dw2-fde.h because that will cause the definition of
+ these symbols to be weak as well.
+
+ This exposes a core issue, how to handle creating weak references vs
+ how to create weak definitions. Either we have to have the definition
+ of TARGET_WEAK_ATTRIBUTE be conditional in the shared header files or
+ have a second declaration if we want a function's references to be weak,
+ but not its definition.
+
+ Making TARGET_WEAK_ATTRIBUTE conditional seems like a good solution until
+ one thinks about scaling to larger problems -- i.e., the condition under
+ which TARGET_WEAK_ATTRIBUTE is active will eventually get far too
+ complicated.
+
+ So, we take an approach similar to #pragma weak -- we have a second
+ declaration for functions that we want to have weak references.
+
+ Neither way is particularly good. */
+
+/* References to __register_frame_info and __deregister_frame_info should
+ be weak in this file if at all possible. */
+extern void __register_frame_info (const void *, struct object *)
+ TARGET_ATTRIBUTE_WEAK;
+extern void __register_frame_info_bases (const void *, struct object *,
+ void *, void *)
+ TARGET_ATTRIBUTE_WEAK;
+extern void *__deregister_frame_info (const void *)
+ TARGET_ATTRIBUTE_WEAK;
+extern void *__deregister_frame_info_bases (const void *)
+ TARGET_ATTRIBUTE_WEAK;
+extern void __do_global_ctors_1 (void);
+
+/* Likewise for _Jv_RegisterClasses. */
+extern void _Jv_RegisterClasses (void *) TARGET_ATTRIBUTE_WEAK;
+
+/* Likewise for transactional memory clone tables. */
+extern void _ITM_registerTMCloneTable (void *, size_t) TARGET_ATTRIBUTE_WEAK;
+extern void _ITM_deregisterTMCloneTable (void *) TARGET_ATTRIBUTE_WEAK;
+
+#ifdef OBJECT_FORMAT_ELF
+
+/* Declare a pointer to void function type. */
+typedef void (*func_ptr) (void);
+#define STATIC static
+
+#else /* OBJECT_FORMAT_ELF */
+
+#include "gbl-ctors.h"
+
+#define STATIC
+
+#endif /* OBJECT_FORMAT_ELF */
+
+#ifdef CRT_BEGIN
+
+/* NOTE: In order to be able to support SVR4 shared libraries, we arrange
+ to have one set of symbols { __CTOR_LIST__, __DTOR_LIST__, __CTOR_END__,
+ __DTOR_END__ } per root executable and also one set of these symbols
+ per shared library. So in any given whole process image, we may have
+ multiple definitions of each of these symbols. In order to prevent
+ these definitions from conflicting with one another, and in order to
+ ensure that the proper lists are used for the initialization/finalization
+ of each individual shared library (respectively), we give these symbols
+ only internal (i.e. `static') linkage, and we also make it a point to
+ refer to only the __CTOR_END__ symbol in crtend.o and the __DTOR_LIST__
+ symbol in crtbegin.o, where they are defined. */
+
+/* No need for .ctors/.dtors section if linker can place them in
+ .init_array/.fini_array section. */
+#ifndef USE_INITFINI_ARRAY
+/* The -1 is a flag to __do_global_[cd]tors indicating that this table
+ does not start with a count of elements. */
+#ifdef CTOR_LIST_BEGIN
+CTOR_LIST_BEGIN;
+#elif defined(CTORS_SECTION_ASM_OP)
+/* Hack: force cc1 to switch to .data section early, so that assembling
+ __CTOR_LIST__ does not undo our behind-the-back change to .ctors. */
+static func_ptr force_to_data[1] __attribute__ ((__used__)) = { };
+asm (CTORS_SECTION_ASM_OP);
+STATIC func_ptr __CTOR_LIST__[1]
+ __attribute__ ((__used__, aligned(sizeof(func_ptr))))
+ = { (func_ptr) (-1) };
+#else
+STATIC func_ptr __CTOR_LIST__[1]
+ __attribute__ ((__used__, section(".ctors"), aligned(sizeof(func_ptr))))
+ = { (func_ptr) (-1) };
+#endif /* __CTOR_LIST__ alternatives */
+
+#ifdef DTOR_LIST_BEGIN
+DTOR_LIST_BEGIN;
+#elif defined(DTORS_SECTION_ASM_OP)
+asm (DTORS_SECTION_ASM_OP);
+STATIC func_ptr __DTOR_LIST__[1]
+ __attribute__ ((aligned(sizeof(func_ptr))))
+ = { (func_ptr) (-1) };
+#else
+STATIC func_ptr __DTOR_LIST__[1]
+ __attribute__((section(".dtors"), aligned(sizeof(func_ptr))))
+ = { (func_ptr) (-1) };
+#endif /* __DTOR_LIST__ alternatives */
+#endif /* USE_INITFINI_ARRAY */
+
+#ifdef USE_EH_FRAME_REGISTRY
+/* Stick a label at the beginning of the frame unwind info so we can register
+ and deregister it with the exception handling library code. */
+STATIC EH_FRAME_SECTION_CONST char __EH_FRAME_BEGIN__[]
+ __attribute__((section(EH_FRAME_SECTION_NAME), aligned(4)))
+ = { };
+#endif /* USE_EH_FRAME_REGISTRY */
+
+#ifdef JCR_SECTION_NAME
+/* Stick a label at the beginning of the java class registration info
+ so we can register them properly. */
+STATIC void *__JCR_LIST__[]
+ __attribute__ ((used, section(JCR_SECTION_NAME), aligned(sizeof(void*))))
+ = { };
+#endif /* JCR_SECTION_NAME */
+
+#if USE_TM_CLONE_REGISTRY
+STATIC func_ptr __TMC_LIST__[]
+ __attribute__((used, section(".tm_clone_table"), aligned(sizeof(void*))))
+ = { };
+# ifdef HAVE_GAS_HIDDEN
+extern func_ptr __TMC_END__[] __attribute__((__visibility__ ("hidden")));
+# endif
+
+static inline void
+deregister_tm_clones (void)
+{
+ void (*fn) (void *);
+
+#ifdef HAVE_GAS_HIDDEN
+ if (__TMC_END__ - __TMC_LIST__ == 0)
+ return;
+#else
+ if (__TMC_LIST__[0] == NULL)
+ return;
+#endif
+
+ fn = _ITM_deregisterTMCloneTable;
+ __asm ("" : "+r" (fn));
+ if (fn)
+ fn (__TMC_LIST__);
+}
+
+static inline void
+register_tm_clones (void)
+{
+ void (*fn) (void *, size_t);
+ size_t size;
+
+#ifdef HAVE_GAS_HIDDEN
+ size = (__TMC_END__ - __TMC_LIST__) / 2;
+#else
+ for (size = 0; __TMC_LIST__[size * 2] != NULL; size++)
+ continue;
+#endif
+ if (size == 0)
+ return;
+
+ fn = _ITM_registerTMCloneTable;
+ __asm ("" : "+r" (fn));
+ if (fn)
+ fn (__TMC_LIST__, size);
+}
+#endif /* USE_TM_CLONE_REGISTRY */
+
+#if defined(INIT_SECTION_ASM_OP) || defined(INIT_ARRAY_SECTION_ASM_OP)
+
+#ifdef OBJECT_FORMAT_ELF
+
+/* Declare the __dso_handle variable. It should have a unique value
+ in every shared-object; in a main program its value is zero. The
+ object should in any case be protected. This means the instance
+ in one DSO or the main program is not used in another object. The
+ dynamic linker takes care of this. */
+
+#ifdef TARGET_LIBGCC_SDATA_SECTION
+extern void *__dso_handle __attribute__ ((__section__ (TARGET_LIBGCC_SDATA_SECTION)));
+#endif
+#ifdef HAVE_GAS_HIDDEN
+extern void *__dso_handle __attribute__ ((__visibility__ ("hidden")));
+#endif
+#ifdef CRTSTUFFS_O
+void *__dso_handle = &__dso_handle;
+#else
+void *__dso_handle = 0;
+#endif
+
+/* The __cxa_finalize function may not be available so we use only a
+ weak declaration. */
+extern void __cxa_finalize (void *) TARGET_ATTRIBUTE_WEAK;
+
+/* Run all the global destructors on exit from the program. */
+
+/* Some systems place the number of pointers in the first word of the
+ table. On SVR4 however, that word is -1. In all cases, the table is
+ null-terminated. On SVR4, we start from the beginning of the list and
+ invoke each per-compilation-unit destructor routine in order
+ until we find that null.
+
+ Note that this function MUST be static. There will be one of these
+ functions in each root executable and one in each shared library, but
+ although they all have the same code, each one is unique in that it
+ refers to one particular associated `__DTOR_LIST__' which belongs to the
+ same particular root executable or shared library file.
+
+ On some systems, this routine is run more than once from the .fini,
+ when exit is called recursively, so we arrange to remember where in
+ the list we left off processing, and we resume at that point,
+ should we be re-invoked. */
+
+static void __attribute__((used))
+__do_global_dtors_aux (void)
+{
+ static _Bool completed;
+
+ if (__builtin_expect (completed, 0))
+ return;
+
+#ifdef CRTSTUFFS_O
+ if (__cxa_finalize)
+ __cxa_finalize (__dso_handle);
+#endif
+
+#ifdef FINI_ARRAY_SECTION_ASM_OP
+ /* If we are using .fini_array then destructors will be run via that
+ mechanism. */
+#elif defined(HIDDEN_DTOR_LIST_END)
+ {
+ /* Safer version that makes sure only .dtors function pointers are
+ called even if the static variable is maliciously changed. */
+ extern func_ptr __DTOR_END__[] __attribute__((visibility ("hidden")));
+ static size_t dtor_idx;
+ const size_t max_idx = __DTOR_END__ - __DTOR_LIST__ - 1;
+ func_ptr f;
+
+ while (dtor_idx < max_idx)
+ {
+ f = __DTOR_LIST__[++dtor_idx];
+ f ();
+ }
+ }
+#else /* !defined (FINI_ARRAY_SECTION_ASM_OP) */
+ {
+ static func_ptr *p = __DTOR_LIST__ + 1;
+ func_ptr f;
+
+ while ((f = *p))
+ {
+ p++;
+ f ();
+ }
+ }
+#endif /* !defined(FINI_ARRAY_SECTION_ASM_OP) */
+
+#if USE_TM_CLONE_REGISTRY
+ deregister_tm_clones ();
+#endif /* USE_TM_CLONE_REGISTRY */
+
+#ifdef USE_EH_FRAME_REGISTRY
+#ifdef CRT_GET_RFIB_DATA
+ /* If we used the new __register_frame_info_bases interface,
+ make sure that we deregister from the same place. */
+ if (__deregister_frame_info_bases)
+ __deregister_frame_info_bases (__EH_FRAME_BEGIN__);
+#else
+ if (__deregister_frame_info)
+ __deregister_frame_info (__EH_FRAME_BEGIN__);
+#endif
+#endif
+
+ completed = 1;
+}
+
+/* Stick a call to __do_global_dtors_aux into the .fini section. */
+#ifdef FINI_SECTION_ASM_OP
+CRT_CALL_STATIC_FUNCTION (FINI_SECTION_ASM_OP, __do_global_dtors_aux)
+#elif defined (FINI_ARRAY_SECTION_ASM_OP)
+static func_ptr __do_global_dtors_aux_fini_array_entry[]
+ __attribute__ ((__used__, section(".fini_array"), aligned(sizeof(func_ptr))))
+ = { __do_global_dtors_aux };
+#else /* !FINI_SECTION_ASM_OP && !FINI_ARRAY_SECTION_ASM_OP */
+static void __attribute__((used))
+__do_global_dtors_aux_1 (void)
+{
+ atexit (__do_global_dtors_aux);
+}
+CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, __do_global_dtors_aux_1)
+#endif
+
+#if defined(USE_EH_FRAME_REGISTRY) \
+ || defined(JCR_SECTION_NAME) \
+ || defined(USE_TM_CLONE_REGISTRY)
+/* Stick a call to __register_frame_info into the .init section. For some
+ reason calls with no arguments work more reliably in .init, so stick the
+ call in another function. */
+
+static void __attribute__((used))
+frame_dummy (void)
+{
+#ifdef USE_EH_FRAME_REGISTRY
+ static struct object object;
+#ifdef CRT_GET_RFIB_DATA
+ void *tbase, *dbase;
+ tbase = 0;
+ CRT_GET_RFIB_DATA (dbase);
+ if (__register_frame_info_bases)
+ __register_frame_info_bases (__EH_FRAME_BEGIN__, &object, tbase, dbase);
+#else
+ if (__register_frame_info)
+ __register_frame_info (__EH_FRAME_BEGIN__, &object);
+#endif /* CRT_GET_RFIB_DATA */
+#endif /* USE_EH_FRAME_REGISTRY */
+
+#ifdef JCR_SECTION_NAME
+ void **jcr_list;
+ __asm ("" : "=g" (jcr_list) : "0" (__JCR_LIST__));
+ if (__builtin_expect (*jcr_list != NULL, 0))
+ {
+ void (*register_classes) (void *) = _Jv_RegisterClasses;
+ __asm ("" : "+r" (register_classes));
+ if (register_classes)
+ register_classes (jcr_list);
+ }
+#endif /* JCR_SECTION_NAME */
+
+#if USE_TM_CLONE_REGISTRY
+ register_tm_clones ();
+#endif /* USE_TM_CLONE_REGISTRY */
+}
+
+#ifdef INIT_SECTION_ASM_OP
+CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, frame_dummy)
+#else /* defined(INIT_SECTION_ASM_OP) */
+static func_ptr __frame_dummy_init_array_entry[]
+ __attribute__ ((__used__, section(".init_array"), aligned(sizeof(func_ptr))))
+ = { frame_dummy };
+#endif /* !defined(INIT_SECTION_ASM_OP) */
+#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME || USE_TM_CLONE_REGISTRY */
+
+#else /* OBJECT_FORMAT_ELF */
+
+/* The function __do_global_ctors_aux is compiled twice (once in crtbegin.o
+ and once in crtend.o). It must be declared static to avoid a link
+ error. Here, we define __do_global_ctors as an externally callable
+ function. It is externally callable so that __main can invoke it when
+ INVOKE__main is defined. This has the additional effect of forcing cc1
+ to switch to the .text section. */
+
+static void __do_global_ctors_aux (void);
+void
+__do_global_ctors (void)
+{
+#ifdef INVOKE__main
+ /* If __main won't actually call __do_global_ctors then it doesn't matter
+ what's inside the function. The inside of __do_global_ctors_aux is
+ called automatically in that case. And the Alliant fx2800 linker
+ crashes on this reference. So prevent the crash. */
+ __do_global_ctors_aux ();
+#endif
+}
+
+asm (INIT_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */
+
+/* A routine to invoke all of the global constructors upon entry to the
+ program. We put this into the .init section (for systems that have
+ such a thing) so that we can properly perform the construction of
+ file-scope static-storage C++ objects within shared libraries. */
+
+static void __attribute__((used))
+__do_global_ctors_aux (void) /* prologue goes in .init section */
+{
+ FORCE_CODE_SECTION_ALIGN /* explicit align before switch to .text */
+ asm (TEXT_SECTION_ASM_OP); /* don't put epilogue and body in .init */
+ DO_GLOBAL_CTORS_BODY;
+ atexit (__do_global_dtors);
+}
+
+#endif /* OBJECT_FORMAT_ELF */
+
+#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
+
+extern void __do_global_dtors (void);
+
+/* This case is used by the Irix 6 port, which supports named sections but
+ not an SVR4-style .fini section. __do_global_dtors can be non-static
+ in this case because we protect it with -hidden_symbol. */
+
+void
+__do_global_dtors (void)
+{
+ func_ptr *p, f;
+ for (p = __DTOR_LIST__ + 1; (f = *p); p++)
+ f ();
+
+#if USE_TM_CLONE_REGISTRY
+ deregister_tm_clones ();
+#endif /* USE_TM_CLONE_REGISTRY */
+
+#ifdef USE_EH_FRAME_REGISTRY
+ if (__deregister_frame_info)
+ __deregister_frame_info (__EH_FRAME_BEGIN__);
+#endif
+}
+
+#if defined(USE_EH_FRAME_REGISTRY) \
+ || defined(JCR_SECTION_NAME) \
+ || defined(USE_TM_CLONE_REGISTRY)
+/* A helper function for __do_global_ctors, which is in crtend.o. Here
+ in crtbegin.o, we can reference a couple of symbols not visible there.
+ Plus, since we're before libgcc.a, we have no problems referencing
+ functions from there. */
+void
+__do_global_ctors_1(void)
+{
+#ifdef USE_EH_FRAME_REGISTRY
+ static struct object object;
+ if (__register_frame_info)
+ __register_frame_info (__EH_FRAME_BEGIN__, &object);
+#endif
+
+#ifdef JCR_SECTION_NAME
+ void **jcr_list
+ __asm ("" : "=g" (jcr_list) : "0" (__JCR_LIST__));
+ if (__builtin_expect (*jcr_list != NULL, 0))
+ {
+ void (*register_classes) (void *) = _Jv_RegisterClasses;
+ __asm ("" : "+r" (register_classes));
+ if (register_classes)
+ register_classes (jcr_list);
+ }
+#endif
+
+#if USE_TM_CLONE_REGISTRY
+ register_tm_clones ();
+#endif /* USE_TM_CLONE_REGISTRY */
+}
+#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME || USE_TM_CLONE_REGISTRY */
+
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
+#endif
+
+#elif defined(CRT_END) /* ! CRT_BEGIN */
+
+/* No need for .ctors/.dtors section if linker can place them in
+ .init_array/.fini_array section. */
+#ifndef USE_INITFINI_ARRAY
+/* Put a word containing zero at the end of each of our two lists of function
+ addresses. Note that the words defined here go into the .ctors and .dtors
+ sections of the crtend.o file, and since that file is always linked in
+ last, these words naturally end up at the very ends of the two lists
+ contained in these two sections. */
+
+#ifdef CTOR_LIST_END
+CTOR_LIST_END;
+#elif defined(CTORS_SECTION_ASM_OP)
+/* Hack: force cc1 to switch to .data section early, so that assembling
+ __CTOR_LIST__ does not undo our behind-the-back change to .ctors. */
+static func_ptr force_to_data[1] __attribute__ ((__used__)) = { };
+asm (CTORS_SECTION_ASM_OP);
+STATIC func_ptr __CTOR_END__[1]
+ __attribute__((aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
+#else
+STATIC func_ptr __CTOR_END__[1]
+ __attribute__((section(".ctors"), aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
+#endif
+
+#ifdef DTOR_LIST_END
+DTOR_LIST_END;
+#elif defined(HIDDEN_DTOR_LIST_END)
+#ifdef DTORS_SECTION_ASM_OP
+asm (DTORS_SECTION_ASM_OP);
+#endif
+func_ptr __DTOR_END__[1]
+ __attribute__ ((used,
+#ifndef DTORS_SECTION_ASM_OP
+ section(".dtors"),
+#endif
+ aligned(sizeof(func_ptr)), visibility ("hidden")))
+ = { (func_ptr) 0 };
+#elif defined(DTORS_SECTION_ASM_OP)
+asm (DTORS_SECTION_ASM_OP);
+STATIC func_ptr __DTOR_END__[1]
+ __attribute__ ((used, aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
+#else
+STATIC func_ptr __DTOR_END__[1]
+ __attribute__((used, section(".dtors"), aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
+#endif
+#endif /* USE_INITFINI_ARRAY */
+
+#ifdef EH_FRAME_SECTION_NAME
+/* Terminate the frame unwind info section with a 4byte 0 as a sentinel;
+ this would be the 'length' field in a real FDE. */
+# if __INT_MAX__ == 2147483647
+typedef int int32;
+# elif __LONG_MAX__ == 2147483647
+typedef long int32;
+# elif __SHRT_MAX__ == 2147483647
+typedef short int32;
+# else
+# error "Missing a 4 byte integer"
+# endif
+STATIC EH_FRAME_SECTION_CONST int32 __FRAME_END__[]
+ __attribute__ ((used, section(EH_FRAME_SECTION_NAME),
+ aligned(sizeof(int32))))
+ = { 0 };
+#endif /* EH_FRAME_SECTION_NAME */
+
+#ifdef JCR_SECTION_NAME
+/* Null terminate the .jcr section array. */
+STATIC void *__JCR_END__[1]
+ __attribute__ ((used, section(JCR_SECTION_NAME),
+ aligned(sizeof(void *))))
+ = { 0 };
+#endif /* JCR_SECTION_NAME */
+
+#if USE_TM_CLONE_REGISTRY
+# ifndef HAVE_GAS_HIDDEN
+static
+# endif
+func_ptr __TMC_END__[]
+ __attribute__((used, section(".tm_clone_table"), aligned(sizeof(void *))))
+# ifdef HAVE_GAS_HIDDEN
+ __attribute__((__visibility__ ("hidden"))) = { };
+# else
+ = { 0, 0 };
+# endif
+#endif /* USE_TM_CLONE_REGISTRY */
+
+#ifdef INIT_ARRAY_SECTION_ASM_OP
+
+/* If we are using .init_array, there is nothing to do. */
+
+#elif defined(INIT_SECTION_ASM_OP)
+
+#ifdef OBJECT_FORMAT_ELF
+static void __attribute__((used))
+__do_global_ctors_aux (void)
+{
+ func_ptr *p;
+ for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
+ (*p) ();
+}
+
+/* Stick a call to __do_global_ctors_aux into the .init section. */
+CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, __do_global_ctors_aux)
+#else /* OBJECT_FORMAT_ELF */
+
+/* Stick the real initialization code, followed by a normal sort of
+ function epilogue at the very end of the .init section for this
+ entire root executable file or for this entire shared library file.
+
+ Note that we use some tricks here to get *just* the body and just
+ a function epilogue (but no function prologue) into the .init
+ section of the crtend.o file. Specifically, we switch to the .text
+ section, start to define a function, and then we switch to the .init
+ section just before the body code.
+
+ Earlier on, we put the corresponding function prologue into the .init
+ section of the crtbegin.o file (which will be linked in first).
+
+ Note that we want to invoke all constructors for C++ file-scope static-
+ storage objects AFTER any other possible initialization actions which
+ may be performed by the code in the .init section contributions made by
+ other libraries, etc. That's because those other initializations may
+ include setup operations for very primitive things (e.g. initializing
+ the state of the floating-point coprocessor, etc.) which should be done
+ before we start to execute any of the user's code. */
+
+static void
+__do_global_ctors_aux (void) /* prologue goes in .text section */
+{
+ asm (INIT_SECTION_ASM_OP);
+ DO_GLOBAL_CTORS_BODY;
+ atexit (__do_global_dtors);
+} /* epilogue and body go in .init section */
+
+FORCE_CODE_SECTION_ALIGN
+asm (TEXT_SECTION_ASM_OP);
+
+#endif /* OBJECT_FORMAT_ELF */
+
+#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
+
+extern void __do_global_ctors (void);
+
+/* This case is used by the Irix 6 port, which supports named sections but
+ not an SVR4-style .init section. __do_global_ctors can be non-static
+ in this case because we protect it with -hidden_symbol. */
+void
+__do_global_ctors (void)
+{
+ func_ptr *p;
+#if defined(USE_EH_FRAME_REGISTRY) \
+ || defined(JCR_SECTION_NAME) \
+ || defined(USE_TM_CLONE_REGISTRY)
+ __do_global_ctors_1();
+#endif
+ for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
+ (*p) ();
+}
+
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
+#endif
+
+#else /* ! CRT_BEGIN && ! CRT_END */
+#error "One of CRT_BEGIN or CRT_END must be defined."
+#endif