/* Specialized bits of code needed to support construction and
destruction of file-scope objects in C++ code.
- Copyright (C) 1991, 1994, 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Ron Guilmette (rfg@monkeys.com).
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC 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 2, or (at your option)
-any later version.
+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 2, or (at your option) any later
+version.
-GNU CC 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.
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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.
-/* As a special exception, if you link this library with files
- compiled with GCC to produce an executable, this does not cause
- the resulting executable to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
-/* This file is a bit like libgcc1.c/libgcc2.c in that it is compiled
+/* 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
This file must be compiled with gcc. */
-/* It is incorrect to include config.h here, because this file is being
- compiled for the target, and hence definitions concerning only the host
- do not apply. */
-
+/* 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 gid_t
+#undef pid_t
+#undef rlim_t
+#undef ssize_t
+#undef uid_t
+#undef vfork
+#include "tconfig.h"
+#include "tsystem.h"
+#include "coretypes.h"
#include "tm.h"
+#include "unwind-dw2-fde.h"
-/* Provide default definitions for the pseudo-ops used to switch to the
- .ctors and .dtors sections.
-
- Note that we want to give these sections the SHF_WRITE attribute
- because these sections will actually contain data (i.e. tables of
- addresses of functions in the current root executable or shared library
- file) and, in the case of a shared library, the relocatable addresses
- will have to be properly resolved/relocated (and then written into) by
- the dynamic linker when it actually attaches the given shared library
- to the executing process. (Note that on SVR4, you may wish to use the
- `-z text' option to the ELF linker, when building a shared library, as
- an additional check that you are doing everything right. But if you do
- use the `-z text' option when building a shared library, you will get
- errors unless the .ctors and .dtors sections are marked as writable
- via the SHF_WRITE attribute.) */
-
-#ifndef CTORS_SECTION_ASM_OP
-#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
+#ifndef FORCE_CODE_SECTION_ALIGN
+# define FORCE_CODE_SECTION_ALIGN
#endif
-#ifndef DTORS_SECTION_ASM_OP
-#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
+
+#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(__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(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
+
+/* 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;
+
#ifdef OBJECT_FORMAT_ELF
/* Declare a pointer to void function type. */
#include "gbl-ctors.h"
-#ifndef ON_EXIT
-#define ON_EXIT(a, b)
-#endif
#define STATIC
#endif /* OBJECT_FORMAT_ELF */
#ifdef CRT_BEGIN
-#ifdef INIT_SECTION_ASM_OP
+/* 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. */
+
+/* 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__ ((__unused__)) = { };
+asm (CTORS_SECTION_ASM_OP);
+STATIC func_ptr __CTOR_LIST__[1]
+ __attribute__ ((__unused__, aligned(sizeof(func_ptr))))
+ = { (func_ptr) (-1) };
+#else
+STATIC func_ptr __CTOR_LIST__[1]
+ __attribute__ ((__unused__, 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 */
+
+#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__ ((unused, section(JCR_SECTION_NAME), aligned(sizeof(void*))))
+ = { };
+#endif /* JCR_SECTION_NAME */
+
+#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
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. */
+ same particular root executable or shared library file.
-static func_ptr __DTOR_LIST__[];
-static void
-__do_global_dtors_aux ()
+ 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)
{
- func_ptr *p;
- for (p = __DTOR_LIST__ + 1; *p; p++)
- (*p) ();
+ 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) */
+
+#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. */
-
-static void
-fini_dummy ()
+#ifdef FINI_SECTION_ASM_OP
+CRT_CALL_STATIC_FUNCTION (FINI_SECTION_ASM_OP, __do_global_dtors_aux)
+#else /* !defined(FINI_SECTION_ASM_OP) */
+static func_ptr __do_global_dtors_aux_fini_array_entry[]
+ __attribute__ ((__unused__, section(".fini_array")))
+ = { __do_global_dtors_aux };
+#endif /* !defined(FINI_SECTION_ASM_OP) */
+
+#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME)
+/* 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)
{
- asm (FINI_SECTION_ASM_OP);
- __do_global_dtors_aux ();
-#ifdef FORCE_FINI_SECTION_ALIGN
- FORCE_FINI_SECTION_ALIGN;
-#endif
- asm (TEXT_SECTION_ASM_OP);
+#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
+ if (__JCR_LIST__[0])
+ {
+ void (*register_classes) (void *) = _Jv_RegisterClasses;
+ __asm ("" : "+r" (register_classes));
+ if (register_classes)
+ register_classes (__JCR_LIST__);
+ }
+#endif /* JCR_SECTION_NAME */
}
+#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__ ((__unused__, section(".init_array")))
+ = { frame_dummy };
+#endif /* !defined(INIT_SECTION_ASM_OP) */
+#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */
+
#else /* OBJECT_FORMAT_ELF */
/* The function __do_global_ctors_aux is compiled twice (once in crtbegin.o
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 __do_global_ctors ()
+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. */
+#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! */
-/* On some svr4 systems, the initial .init section preamble code provided in
- crti.o may do something, such as bump the stack, which we have to
- undo before we reach the function prologue code for __do_global_ctors
- (directly below). For such systems, define the macro INIT_SECTION_PREAMBLE
- to expand into the code needed to undo the actions of the crti.o file. */
-
-#ifdef INIT_SECTION_PREAMBLE
- INIT_SECTION_PREAMBLE;
-#endif
-
/* 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. */
+ file-scope static-storage C++ objects within shared libraries. */
-static void
-__do_global_ctors_aux () /* prologue goes in .init section */
+static void __attribute__((used))
+__do_global_ctors_aux (void) /* prologue goes in .init section */
{
-#ifdef FORCE_INIT_SECTION_ALIGN
- FORCE_INIT_SECTION_ALIGN; /* Explicit align before switch to .text */
-#endif
+ 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;
- ON_EXIT (__do_global_dtors, 0);
+ atexit (__do_global_dtors);
}
#endif /* OBJECT_FORMAT_ELF */
-#endif /* defined(INIT_SECTION_ASM_OP) */
-/* Force cc1 to switch to .data section. */
-static func_ptr force_to_data[0] = { };
+#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
-/* 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. */
+extern void __do_global_dtors (void);
-/* 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;
-#else
-asm (CTORS_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */
-STATIC func_ptr __CTOR_LIST__[1] = { (func_ptr) (-1) };
+/* 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 ();
+
+#ifdef USE_EH_FRAME_REGISTRY
+ if (__deregister_frame_info)
+ __deregister_frame_info (__EH_FRAME_BEGIN__);
#endif
+}
-#ifdef DTOR_LIST_BEGIN
-DTOR_LIST_BEGIN;
-#else
-asm (DTORS_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */
-STATIC func_ptr __DTOR_LIST__[1] = { (func_ptr) (-1) };
+#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME)
+/* 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
+ if (__JCR_LIST__[0])
+ {
+ void (*register_classes) (void *) = _Jv_RegisterClasses;
+ __asm ("" : "+r" (register_classes));
+ if (register_classes)
+ register_classes (__JCR_LIST__);
+ }
+#endif
+}
+#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */
-#endif /* defined(CRT_BEGIN) */
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
+#endif
-#ifdef CRT_END
+#elif defined(CRT_END) /* ! CRT_BEGIN */
-#ifdef INIT_SECTION_ASM_OP
+/* 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 OBJECT_FORMAT_ELF
+#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__ ((__unused__)) = { };
+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
-static func_ptr __CTOR_END__[];
-static void
-__do_global_ctors_aux ()
+#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__ ((unused,
+#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__ ((unused, aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
+#else
+STATIC func_ptr __DTOR_END__[1]
+ __attribute__((unused, section(".dtors"), aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
+#endif
+
+#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__ ((unused, 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__ ((unused, section(JCR_SECTION_NAME),
+ aligned(sizeof(void *))))
+ = { 0 };
+#endif /* JCR_SECTION_NAME */
+
+#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--)
}
/* Stick a call to __do_global_ctors_aux into the .init section. */
-
-static void
-init_dummy ()
-{
- asm (INIT_SECTION_ASM_OP);
- __do_global_ctors_aux ();
-#ifdef FORCE_INIT_SECTION_ALIGN
- FORCE_INIT_SECTION_ALIGN;
-#endif
- asm (TEXT_SECTION_ASM_OP);
-
-/* This is a kludge. The i386 Linux dynamic linker needs ___brk_addr,
- __environ and atexit (). We have to make sure they are in the .dynsym
- section. We accomplish it by making a dummy call here. This
- code is never reached. */
-
-#if defined(__linux__) && defined(__PIC__) && defined(__i386__)
- {
- extern void *___brk_addr;
- extern char **__environ;
-
- ___brk_addr = __environ;
- atexit ();
- }
-#endif
-}
-
+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
before we start to execute any of the user's code. */
static void
-__do_global_ctors_aux () /* prologue goes in .text section */
+__do_global_ctors_aux (void) /* prologue goes in .text section */
{
asm (INIT_SECTION_ASM_OP);
DO_GLOBAL_CTORS_BODY;
- ON_EXIT (__do_global_dtors, 0);
+ atexit (__do_global_dtors);
} /* epilogue and body go in .init section */
-#endif /* OBJECT_FORMAT_ELF */
+FORCE_CODE_SECTION_ALIGN
+asm (TEXT_SECTION_ASM_OP);
-#endif /* defined(INIT_SECTION_ASM_OP) */
+#endif /* OBJECT_FORMAT_ELF */
-/* Force cc1 to switch to .data section. */
-static func_ptr force_to_data[0] = { };
+#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
-/* 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. */
+extern void __do_global_ctors (void);
-#ifdef CTOR_LIST_END
-CTOR_LIST_END;
-#else
-asm (CTORS_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */
-STATIC func_ptr __CTOR_END__[1] = { (func_ptr) 0 };
+/* 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)
+ __do_global_ctors_1();
#endif
+ for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
+ (*p) ();
+}
-#ifdef DTOR_LIST_END
-DTOR_LIST_END;
-#else
-asm (DTORS_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */
-STATIC func_ptr __DTOR_END__[1] = { (func_ptr) 0 };
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
#endif
-#endif /* defined(CRT_END) */
+#else /* ! CRT_BEGIN && ! CRT_END */
+#error "One of CRT_BEGIN or CRT_END must be defined."
+#endif
OSDN Git Service
