/* 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 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.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
the file, and distribution when not linked into a combine
executable.)
-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.
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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 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(inhibit_libc) && !defined(CRTSTUFFT_O) \
+ && defined(__GLIBC__) && __GLIBC__ >= 2
+#include <link.h>
+# if (__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
/* We do not want to add the weak attribute to the declarations of these
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. */
#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
= { (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. */
-#ifdef INIT_SECTION_ASM_OP
-STATIC
-#endif
-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
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 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 EH_FRAME_SECTION_NAME
-#if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
+#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)
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);
-}
-
-#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
+#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 EH_FRAME_SECTION_NAME
+#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 */
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
+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);
#endif /* OBJECT_FORMAT_ELF */
-#else /* INIT_SECTION_ASM_OP */
+#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
+
+extern void __do_global_dtors (void);
-#ifdef HAS_INIT_SECTION
/* 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. */
for (p = __DTOR_LIST__ + 1; (f = *p); p++)
f ();
-#ifdef EH_FRAME_SECTION_NAME
+#ifdef USE_EH_FRAME_REGISTRY
if (__deregister_frame_info)
__deregister_frame_info (__EH_FRAME_BEGIN__);
#endif
}
-#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
-/* Define a function here to call __register_frame. crtend.o is linked in
- after libgcc.a, and hence can't call libgcc.a functions directly. That
- can lead to unresolved function references. */
+#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
-__frame_dummy (void)
+__do_global_ctors_1(void)
{
-#ifdef EH_FRAME_SECTION_NAME
+#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] && _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 /* HAS_INIT_SECTION */
-#endif /* INIT_SECTION_ASM_OP */
-#endif /* defined(CRT_BEGIN) */
-
-#ifdef CRT_END
-
-#ifdef INIT_SECTION_ASM_OP
-
-#ifdef OBJECT_FORMAT_ELF
-
-static func_ptr __CTOR_END__[];
-static void
-__do_global_ctors_aux (void)
-{
- func_ptr *p;
- for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
- (*p) ();
-}
+#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */
-/* 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;
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
#endif
-}
-#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 */
-
-#ifdef FORCE_INIT_SECTION_ALIGN
-FORCE_INIT_SECTION_ALIGN;
-#endif
-
-asm (TEXT_SECTION_ASM_OP);
-
-#endif /* OBJECT_FORMAT_ELF */
-
-#else /* defined(INIT_SECTION_ASM_OP) */
-
-#ifdef HAS_INIT_SECTION
-/* 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. */
-static func_ptr __CTOR_END__[];
-extern void __frame_dummy (void);
-void
-__do_global_ctors (void)
-{
- func_ptr *p;
-#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
- __frame_dummy ();
-#endif
- for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
- (*p) ();
-}
-#endif
-
-#endif /* defined(INIT_SECTION_ASM_OP) */
+#elif defined(CRT_END) /* ! CRT_BEGIN */
/* 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
#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 __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))))
#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 */
+#endif /* EH_FRAME_SECTION_NAME */
#ifdef JCR_SECTION_NAME
-/* Stick a label at the beginning of the java class registration info
- so we can register them properly. */
-
+/* Null terminate the .jcr section array. */
STATIC void *__JCR_END__[1]
__attribute__ ((unused, section(JCR_SECTION_NAME),
- aligned(sizeof(func_ptr))))
+ aligned(sizeof(void *))))
= { 0 };
#endif /* JCR_SECTION_NAME */
-#endif /* defined(CRT_END) */
+#ifdef INIT_ARRAY_SECTION_ASM_OP
-#else /* OBJECT_FORMAT_MACHO */
+/* If we are using .init_array, there is nothing to do. */
-/* 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.
+#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) ();
+}
- crtend.o also puts in the terminating zero in the frame information
- segment. */
+/* 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 */
-/* 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. */
+/* 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.
-#include <mach-o/ldsyms.h>
-extern const struct section *
- getsectbynamefromheader (const struct mach_header *,
- const char *, const char *);
+ 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.
-#ifdef CRT_BEGIN
+ Earlier on, we put the corresponding function prologue into the .init
+ section of the crtbegin.o file (which will be linked in first).
-static void __reg_frame_ctor (void) __attribute__ ((constructor));
+ 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
-__reg_frame_ctor (void)
+__do_global_ctors_aux (void) /* prologue goes in .text section */
{
- static struct object object;
- const struct section *eh_frame;
+ asm (INIT_SECTION_ASM_OP);
+ DO_GLOBAL_CTORS_BODY;
+ atexit (__do_global_dtors);
+} /* epilogue and body go in .init section */
- eh_frame = getsectbynamefromheader (&_mh_execute_header,
- "__TEXT", "__eh_frame");
- __register_frame_info ((void *) eh_frame->addr, &object);
-}
+FORCE_CODE_SECTION_ALIGN
+asm (TEXT_SECTION_ASM_OP);
-#endif /* CRT_BEGIN */
+#endif /* OBJECT_FORMAT_ELF */
-#ifdef CRT_END
+#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
-static void __dereg_frame_dtor (void) __attribute__ ((destructor));
+extern void __do_global_ctors (void);
-static void
-__dereg_frame_dtor (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)
{
- const struct section *eh_frame;
-
- eh_frame = getsectbynamefromheader (&_mh_execute_header,
- "__TEXT", "__eh_frame");
- __deregister_frame_info ((void *) eh_frame->addr);
+ 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) ();
}
-/* Terminate the frame section with a final zero. */
-STATIC int __FRAME_END__[]
- __attribute__ ((unused, mode(SI), section(EH_FRAME_SECTION_NAME),
- aligned(4)))
- = { 0 };
-#endif /* CRT_END */
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
+#endif
-#endif /* OBJECT_FORMAT_MACHO */
+#else /* ! CRT_BEGIN && ! CRT_END */
+#error "One of CRT_BEGIN or CRT_END must be defined."
+#endif
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