/* 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, 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
+ 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Ron Guilmette (rfg@monkeys.com).
This file is part of GCC.
&& !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.
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 *)
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
#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 */
__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
/* 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 */
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
/* 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)
-#else /* !defined(FINI_SECTION_ASM_OP) */
+#elif defined (FINI_ARRAY_SECTION_ASM_OP)
static func_ptr __do_global_dtors_aux_fini_array_entry[]
- __attribute__ ((__unused__, section(".fini_array")))
+ __attribute__ ((__used__, section(".fini_array")))
= { __do_global_dtors_aux };
-#endif /* !defined(FINI_SECTION_ASM_OP) */
+#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
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")))
+ __attribute__ ((__used__, section(".init_array")))
= { frame_dummy };
#endif /* !defined(INIT_SECTION_ASM_OP) */
#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */
#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
#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))))
asm (DTORS_SECTION_ASM_OP);
#endif
func_ptr __DTOR_END__[1]
- __attribute__ ((unused,
+ __attribute__ ((used,
#ifndef DTORS_SECTION_ASM_OP
section(".dtors"),
#endif
#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
+#endif /* USE_INITFINI_ARRAY */
#ifdef EH_FRAME_SECTION_NAME
/* Terminate the frame unwind info section with a 4byte 0 as a sentinel;
# error "Missing a 4 byte integer"
# endif
STATIC EH_FRAME_SECTION_CONST int32 __FRAME_END__[]
- __attribute__ ((unused, section(EH_FRAME_SECTION_NAME),
+ __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 */
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