/* 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 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Ron Guilmette (rfg@monkeys.com).
This file is part of GCC.
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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* 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 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"
+#ifndef FORCE_CODE_SECTION_ALIGN
+# define FORCE_CODE_SECTION_ALIGN
+#endif
+
#ifndef CRT_CALL_STATIC_FUNCTION
-# define CRT_CALL_STATIC_FUNCTION(func) func ()
+# 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(HAVE_LD_EH_FRAME_HDR) \
- && !defined(CRTSTUFFT_O) \
+#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) \
#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
/* 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
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.
/* References to __register_frame_info and __deregister_frame_info should
be weak in this file if at all possible. */
-extern void __register_frame_info (void *, struct object *)
+extern void __register_frame_info (const void *, struct object *)
TARGET_ATTRIBUTE_WEAK;
-extern void __register_frame_info_bases (void *, struct object *,
+extern void __register_frame_info_bases (const void *, struct object *,
void *, void *)
TARGET_ATTRIBUTE_WEAK;
-extern void *__deregister_frame_info (void *)
+extern void *__deregister_frame_info (const void *)
TARGET_ATTRIBUTE_WEAK;
-extern void *__deregister_frame_info_bases (void *)
+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;
-#ifndef OBJECT_FORMAT_MACHO
-
#ifdef OBJECT_FORMAT_ELF
/* Declare a pointer to void function type. */
= { (func_ptr) (-1) };
#endif /* __DTOR_LIST__ alternatives */
-#ifdef EH_FRAME_SECTION_NAME
+#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 char __EH_FRAME_BEGIN__[]
+STATIC EH_FRAME_SECTION_CONST char __EH_FRAME_BEGIN__[]
__attribute__((section(EH_FRAME_SECTION_NAME), aligned(4)))
= { };
-#endif /* EH_FRAME_SECTION_NAME */
+#endif /* USE_EH_FRAME_REGISTRY */
#ifdef JCR_SECTION_NAME
/* Stick a label at the beginning of the java class registration info
= { };
#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. */
-/* XXX Ideally the following should be implemented using
- __attribute__ ((__visibility__ ("hidden")))
- but the __attribute__ support is not yet there. */
+#ifdef TARGET_LIBGCC_SDATA_SECTION
+extern void *__dso_handle __attribute__ ((__section__ (TARGET_LIBGCC_SDATA_SECTION)));
+#endif
#ifdef HAVE_GAS_HIDDEN
-asm (".hidden\t__dso_handle");
+extern void *__dso_handle __attribute__ ((__visibility__ ("hidden")));
#endif
-
#ifdef CRTSTUFFS_O
void *__dso_handle = &__dso_handle;
#else
the list we left off processing, and we resume at that point,
should we be re-invoked. */
-static void
+static void __attribute__((used))
__do_global_dtors_aux (void)
{
+#ifndef FINI_ARRAY_SECTION_ASM_OP
static func_ptr *p = __DTOR_LIST__ + 1;
- static int completed;
func_ptr f;
+#endif /* !defined(FINI_ARRAY_SECTION_ASM_OP) */
+ static _Bool completed;
if (__builtin_expect (completed, 0))
return;
__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. */
+#else /* !defined (FINI_ARRAY_SECTION_ASM_OP) */
while ((f = *p))
{
p++;
f ();
}
+#endif /* !defined(FINI_ARRAY_SECTION_ASM_OP) */
#ifdef USE_EH_FRAME_REGISTRY
-#if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
+#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)
completed = 1;
}
-
/* Stick a call to __do_global_dtors_aux into the .fini section. */
-
-static void __attribute__ ((__unused__))
-fini_dummy (void)
-{
- asm (FINI_SECTION_ASM_OP);
- CRT_CALL_STATIC_FUNCTION (__do_global_dtors_aux);
-#ifdef FORCE_FINI_SECTION_ALIGN
- FORCE_FINI_SECTION_ALIGN;
-#endif
- asm (TEXT_SECTION_ASM_OP);
-}
+#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
+static void __attribute__((used))
frame_dummy (void)
{
#ifdef USE_EH_FRAME_REGISTRY
static struct object object;
-#if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
+#ifdef CRT_GET_RFIB_DATA
void *tbase, *dbase;
-#ifdef CRT_GET_RFIB_TEXT
- CRT_GET_RFIB_TEXT (tbase);
-#else
tbase = 0;
-#endif
-#ifdef CRT_GET_RFIB_DATA
CRT_GET_RFIB_DATA (dbase);
-#else
- dbase = 0;
-#endif
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
-#endif /* EH_FRAME_SECTION_NAME */
+#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 */
}
-static void __attribute__ ((__unused__))
-init_dummy (void)
-{
- asm (INIT_SECTION_ASM_OP);
- CRT_CALL_STATIC_FUNCTION (frame_dummy);
-#ifdef FORCE_INIT_SECTION_ALIGN
- FORCE_INIT_SECTION_ALIGN;
-#endif
- asm (TEXT_SECTION_ASM_OP);
-}
-#endif /* EH_FRAME_SECTION_NAME || 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 */
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. */
-static void
+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;
atexit (__do_global_dtors);
#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. */
__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 /* EH_FRAME_SECTION_NAME || JCR_SECTION_NAME */
+#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */
#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
#error "What are you doing with crtstuff.c, then?"
#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 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__ ((unused, section(EH_FRAME_SECTION_NAME),
+ aligned(sizeof(int32))))
= { 0 };
#endif /* EH_FRAME_SECTION_NAME */
= { 0 };
#endif /* JCR_SECTION_NAME */
-#ifdef INIT_SECTION_ASM_OP
+#ifdef INIT_ARRAY_SECTION_ASM_OP
-#ifdef OBJECT_FORMAT_ELF
+/* If we are using .init_array, there is nothing to do. */
-static void
+#elif defined(INIT_SECTION_ASM_OP)
+
+#ifdef OBJECT_FORMAT_ELF
+static void __attribute__((used))
__do_global_ctors_aux (void)
{
func_ptr *p;
}
/* Stick a call to __do_global_ctors_aux into the .init section. */
-
-static void __attribute__ ((__unused__))
-init_dummy (void)
-{
- asm (INIT_SECTION_ASM_OP);
- CRT_CALL_STATIC_FUNCTION (__do_global_ctors_aux);
-#ifdef FORCE_INIT_SECTION_ALIGN
- FORCE_INIT_SECTION_ALIGN;
-#endif
- asm (TEXT_SECTION_ASM_OP);
-#ifdef CRT_END_INIT_DUMMY
- CRT_END_INIT_DUMMY;
-#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
atexit (__do_global_dtors);
} /* epilogue and body go in .init section */
-#ifdef FORCE_INIT_SECTION_ALIGN
-FORCE_INIT_SECTION_ALIGN;
-#endif
-
+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. */
-extern void __do_global_ctors_1(void);
void
__do_global_ctors (void)
{
#else /* ! CRT_BEGIN && ! CRT_END */
#error "One of CRT_BEGIN or CRT_END must be defined."
#endif
-
-#else /* OBJECT_FORMAT_MACHO */
-
-/* For Mach-O format executables, we assume that the system's runtime is
- smart enough to handle constructors and destructors, but doesn't have
- an init section (if it can't even handle constructors/destructors
- you should be using INVOKE__main, not crtstuff). All we need to do
- is install/deinstall the frame information for exceptions. We do this
- by putting a constructor in crtbegin.o and a destructor in crtend.o.
-
- crtend.o also puts in the terminating zero in the frame information
- segment. */
-
-/* The crtstuff for other object formats use the symbol __EH_FRAME_BEGIN__
- to figure out the start of the exception frame, but here we use
- getsectbynamefromheader to find this value. Either method would work,
- but this method avoids creating any global symbols, which seems
- cleaner. */
-
-#include <mach-o/ldsyms.h>
-extern const struct section *
- getsectbynamefromheader (const struct mach_header *,
- const char *, const char *);
-
-#ifdef CRT_BEGIN
-
-static void __reg_frame_ctor (void) __attribute__ ((constructor));
-
-static void
-__reg_frame_ctor (void)
-{
- static struct object object;
- const struct section *eh_frame;
-
- eh_frame = getsectbynamefromheader (&_mh_execute_header,
- "__TEXT", "__eh_frame");
- __register_frame_info ((void *) eh_frame->addr, &object);
-}
-
-#elif defined(CRT_END)
-
-static void __dereg_frame_dtor (void) __attribute__ ((destructor));
-
-static void
-__dereg_frame_dtor (void)
-{
- const struct section *eh_frame;
-
- eh_frame = getsectbynamefromheader (&_mh_execute_header,
- "__TEXT", "__eh_frame");
- __deregister_frame_info ((void *) eh_frame->addr);
-}
-
-/* Terminate the frame section with a final zero. */
-STATIC int __FRAME_END__[]
- __attribute__ ((unused, mode(SI), section(EH_FRAME_SECTION_NAME),
- aligned(4)))
- = { 0 };
-
-#else /* ! CRT_BEGIN && ! CRT_END */
-#error "One of CRT_BEGIN or CRT_END must be defined."
-#endif
-
-#endif /* OBJECT_FORMAT_MACHO */
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