1999, 2000, 2001 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, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
/* This file is a bit like libgcc2.c in that it is compiled
multiple times and yields multiple .o files.
# define CRT_CALL_STATIC_FUNCTION(func) func ()
#endif
+#if defined(OBJECT_FORMAT_ELF) && defined(HAVE_LD_EH_FRAME_HDR) \
+ && !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
+
/* 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.
extern void *__deregister_frame_info_bases (void *)
TARGET_ATTRIBUTE_WEAK;
-#ifndef OBJECT_FORMAT_MACHO
+/* Likewise for _Jv_RegisterClasses. */
+extern void _Jv_RegisterClasses (void *) TARGET_ATTRIBUTE_WEAK;
-/* 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.)
-
- These defaults do not include leading spacing, as they will only be
- used in asm:s here. */
-
-#ifndef CTORS_SECTION_ASM_OP
-#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
-#endif
-#ifndef DTORS_SECTION_ASM_OP
-#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
-#endif
+#ifndef OBJECT_FORMAT_MACHO
#ifdef OBJECT_FORMAT_ELF
#ifdef CRT_BEGIN
+/* 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 EH_FRAME_SECTION_NAME
+/* 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__[]
+ __attribute__((section(EH_FRAME_SECTION_NAME), aligned(4)))
+ = { };
+#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. */
+STATIC void *__JCR_LIST__[]
+ __attribute__ ((unused, section(JCR_SECTION_NAME), aligned(sizeof(void*))))
+ = { };
+#endif /* JCR_SECTION_NAME */
+
#ifdef INIT_SECTION_ASM_OP
#ifdef OBJECT_FORMAT_ELF
the list we left off processing, and we resume at that point,
should we be re-invoked. */
-static char __EH_FRAME_BEGIN__[];
-static func_ptr __DTOR_LIST__[];
static void
__do_global_dtors_aux (void)
{
f ();
}
-#ifdef EH_FRAME_SECTION_ASM_OP
+#ifdef USE_EH_FRAME_REGISTRY
#if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
/* If we used the new __register_frame_info_bases interface,
make sure that we deregister from the same place. */
asm (TEXT_SECTION_ASM_OP);
}
-#ifdef EH_FRAME_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
frame_dummy (void)
{
+#ifdef USE_EH_FRAME_REGISTRY
static struct object object;
#if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
void *tbase, *dbase;
if (__register_frame_info)
__register_frame_info (__EH_FRAME_BEGIN__, &object);
#endif
+#endif /* EH_FRAME_SECTION_NAME */
+#ifdef JCR_SECTION_NAME
+ if (__JCR_LIST__[0] && _Jv_RegisterClasses)
+ _Jv_RegisterClasses (__JCR_LIST__);
+#endif /* JCR_SECTION_NAME */
}
static void __attribute__ ((__unused__))
#endif
asm (TEXT_SECTION_ASM_OP);
}
-#endif /* EH_FRAME_SECTION_ASM_OP */
+#endif /* EH_FRAME_SECTION_NAME || 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
}
/* 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 (void) /* prologue goes in .init section */
#endif /* OBJECT_FORMAT_ELF */
-#else /* defined(INIT_SECTION_ASM_OP) */
+#elif defined(HAS_INIT_SECTION) /* ! 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 .fini section. __do_global_dtors can be non-static
in this case because we protect it with -hidden_symbol. */
-static char __EH_FRAME_BEGIN__[];
-static func_ptr __DTOR_LIST__[];
void
__do_global_dtors (void)
{
for (p = __DTOR_LIST__ + 1; (f = *p); p++)
f ();
-#ifdef EH_FRAME_SECTION_ASM_OP
+#ifdef USE_EH_FRAME_REGISTRY
if (__deregister_frame_info)
__deregister_frame_info (__EH_FRAME_BEGIN__);
#endif
}
-#ifdef EH_FRAME_SECTION_ASM_OP
-/* 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 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__);
#endif
+}
+#endif /* EH_FRAME_SECTION_NAME || JCR_SECTION_NAME */
-#endif /* defined(INIT_SECTION_ASM_OP) */
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
+#endif
-/* Force cc1 to switch to .data section. */
-static func_ptr force_to_data[1] __attribute__ ((__unused__)) = { };
+#elif defined(CRT_END) /* ! CRT_BEGIN */
-/* 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. */
+/* 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. */
-/* 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;
+#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
-asm (CTORS_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */
-STATIC func_ptr __CTOR_LIST__[1] __attribute__ ((__unused__))
- = { (func_ptr) (-1) };
+STATIC func_ptr __CTOR_END__[1]
+ __attribute__((section(".ctors"), aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
#endif
-#ifdef DTOR_LIST_BEGIN
-DTOR_LIST_BEGIN;
+#ifdef DTOR_LIST_END
+DTOR_LIST_END;
+#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
-asm (DTORS_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */
-STATIC func_ptr __DTOR_LIST__[1] = { (func_ptr) (-1) };
-#endif
-
-#ifdef EH_FRAME_SECTION_ASM_OP
-/* Stick a label at the beginning of the frame unwind info so we can register
- and deregister it with the exception handling library code. */
-
-asm (EH_FRAME_SECTION_ASM_OP);
-#ifdef INIT_SECTION_ASM_OP
-STATIC
+STATIC func_ptr __DTOR_END__[1]
+ __attribute__((unused, section(".dtors"), aligned(sizeof(func_ptr))))
+ = { (func_ptr) 0 };
#endif
-char __EH_FRAME_BEGIN__[] = { };
-#endif /* EH_FRAME_SECTION_ASM_OP */
-
-#endif /* defined(CRT_BEGIN) */
-#ifdef CRT_END
+#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)))
+ = { 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_SECTION_ASM_OP
#ifdef OBJECT_FORMAT_ELF
-static func_ptr __CTOR_END__[];
static void
__do_global_ctors_aux (void)
{
#endif /* OBJECT_FORMAT_ELF */
-#else /* defined(INIT_SECTION_ASM_OP) */
+#elif defined(HAS_INIT_SECTION) /* ! 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__[];
-#ifdef EH_FRAME_SECTION_ASM_OP
-extern void __frame_dummy (void);
-#endif
+extern void __do_global_ctors_1(void);
void
__do_global_ctors (void)
{
func_ptr *p;
-#ifdef EH_FRAME_SECTION_ASM_OP
- __frame_dummy ();
+#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) ();
}
-#endif
-#endif /* defined(INIT_SECTION_ASM_OP) */
-
-/* Force cc1 to switch to .data section. */
-static func_ptr force_to_data[1] __attribute__ ((__unused__)) = { };
-
-/* 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 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 };
+#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
+#error "What are you doing with crtstuff.c, then?"
#endif
-#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] __attribute__ ((__unused__))
- = { (func_ptr) 0 };
+#else /* ! CRT_BEGIN && ! CRT_END */
+#error "One of CRT_BEGIN or CRT_END must be defined."
#endif
-#ifdef EH_FRAME_SECTION_ASM_OP
-/* Terminate the frame unwind info section with a 4byte 0 as a sentinel;
- this would be the 'length' field in a real FDE. */
-
-typedef unsigned int ui32 __attribute__ ((mode (SI)));
-asm (EH_FRAME_SECTION_ASM_OP);
-STATIC ui32 __FRAME_END__[] __attribute__ ((__unused__)) = { 0 };
-#endif /* EH_FRAME_SECTION */
-
-#endif /* defined(CRT_END) */
-
#else /* OBJECT_FORMAT_MACHO */
/* For Mach-O format executables, we assume that the system's runtime is
__register_frame_info ((void *) eh_frame->addr, &object);
}
-#endif /* CRT_BEGIN */
-
-#ifdef CRT_END
+#elif defined(CRT_END)
static void __dereg_frame_dtor (void) __attribute__ ((destructor));
}
/* Terminate the frame section with a final zero. */
+STATIC int __FRAME_END__[]
+ __attribute__ ((unused, mode(SI), section(EH_FRAME_SECTION_NAME),
+ aligned(4)))
+ = { 0 };
-/* Force cc1 to switch to .data section. */
-static void * force_to_data[1] __attribute__ ((__unused__)) = { };
-
-typedef unsigned int ui32 __attribute__ ((mode (SI)));
-asm (EH_FRAME_SECTION_ASM_OP);
-static ui32 __FRAME_END__[] __attribute__ ((__unused__)) = { 0 };
-
-#endif /* CRT_END */
+#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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