/* Specialized bits of code needed to support construction and
destruction of file-scope objects in C++ code.
- Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
+ 2002, 2003, 2004, 2005, 2006, 2007, 2009 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 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
-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.)
-
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.
-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, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+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 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
-/* We include auto-host.h here to get HAVE_GAS_HIDDEN. This is
- supposedly valid even though this is a "target" file. */
+/* 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"
}
#endif
-#if defined(OBJECT_FORMAT_ELF) && defined(HAVE_LD_EH_FRAME_HDR) \
+#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(inhibit_libc) && !defined(CRTSTUFFT_O) \
&& defined(__GLIBC__) && __GLIBC__ >= 2
#include <link.h>
-# if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
+/* 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
#if defined(EH_FRAME_SECTION_NAME) && !defined(USE_PT_GNU_EH_FRAME)
# define USE_EH_FRAME_REGISTRY
#endif
-#if defined(EH_FRAME_SECTION_NAME) && defined(HAVE_LD_RO_RW_SECTION_MIXING)
+#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.
but not its definition.
Making TARGET_WEAK_ATTRIBUTE conditional seems like a good solution until
- one thinks about scaling to larger problems -- ie, the condition under
+ one thinks about scaling to larger problems -- i.e., the condition under
which TARGET_WEAK_ATTRIBUTE is active will eventually get far too
complicated.
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 *)
#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__)) = { };
+static func_ptr force_to_data[1] __attribute__ ((__used__)) = { };
asm (CTORS_SECTION_ASM_OP);
STATIC func_ptr __CTOR_LIST__[1]
- __attribute__ ((__unused__, aligned(sizeof(func_ptr))))
+ __attribute__ ((__used__, aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#else
STATIC func_ptr __CTOR_LIST__[1]
- __attribute__ ((__unused__, section(".ctors"), aligned(sizeof(func_ptr))))
+ __attribute__ ((__used__, section(".ctors"), aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#endif /* __CTOR_LIST__ alternatives */
/* 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*))))
+ __attribute__ ((used, section(JCR_SECTION_NAME), aligned(sizeof(void*))))
= { };
#endif /* JCR_SECTION_NAME */
-#ifdef INIT_SECTION_ASM_OP
+#if defined(INIT_SECTION_ASM_OP) || defined(INIT_ARRAY_SECTION_ASM_OP)
#ifdef OBJECT_FORMAT_ELF
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
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
static void __attribute__((used))
__do_global_dtors_aux (void)
{
- static func_ptr *p = __DTOR_LIST__ + 1;
static _Bool completed;
- func_ptr f;
if (__builtin_expect (completed, 0))
return;
__cxa_finalize (__dso_handle);
#endif
- while ((f = *p))
- {
- p++;
- f ();
- }
+#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
}
/* 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")))
+ = { __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)
/* Stick a call to __register_frame_info into the .init section. For some
#endif /* CRT_GET_RFIB_DATA */
#endif /* USE_EH_FRAME_REGISTRY */
#ifdef JCR_SECTION_NAME
- if (__JCR_LIST__[0] && _Jv_RegisterClasses)
- _Jv_RegisterClasses (__JCR_LIST__);
+ 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__ ((__used__, section(".init_array")))
+ = { frame_dummy };
+#endif /* !defined(INIT_SECTION_ASM_OP) */
#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */
#else /* OBJECT_FORMAT_ELF */
__register_frame_info (__EH_FRAME_BEGIN__, &object);
#endif
#ifdef JCR_SECTION_NAME
- if (__JCR_LIST__[0] && _Jv_RegisterClasses)
- _Jv_RegisterClasses (__JCR_LIST__);
+ 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 */
#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__)) = { };
+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))))
#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__ ((unused, aligned(sizeof(func_ptr))))
+ __attribute__ ((used, aligned(sizeof(func_ptr))))
= { (func_ptr) 0 };
#else
STATIC func_ptr __DTOR_END__[1]
- __attribute__((unused, section(".dtors"), aligned(sizeof(func_ptr))))
+ __attribute__((used, 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. */
-STATIC EH_FRAME_SECTION_CONST int __FRAME_END__[]
- __attribute__ ((unused, mode(SI), section(EH_FRAME_SECTION_NAME),
- aligned(4)))
+# 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__ ((unused, section(JCR_SECTION_NAME),
+STATIC void *__JCR_END__[1]
+ __attribute__ ((used, section(JCR_SECTION_NAME),
aligned(sizeof(void *))))
= { 0 };
#endif /* JCR_SECTION_NAME */
-#ifdef INIT_SECTION_ASM_OP
+#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))
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