X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fcrtstuff.c;h=6fc571b2a6f734b193480510f05fca1aad6455d7;hb=2c7b50c15c147ee4a34be096ea19501432fe195c;hp=97ac69ad022ac813c8e7ab097b05e3da647f7258;hpb=dd41a27bc51c171701568a1111898742957e6f49;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/crtstuff.c b/gcc/crtstuff.c
index 97ac69ad022..6fc571b2a6f 100644
--- a/gcc/crtstuff.c
+++ b/gcc/crtstuff.c
@@ -1,34 +1,29 @@
 /* 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 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.
@@ -58,6 +53,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
    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"
@@ -80,11 +79,25 @@ call_ ## FUNC (void)					\
 }
 #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
@@ -98,6 +111,11 @@ call_ ## FUNC (void)					\
 # 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.
@@ -117,7 +135,7 @@ call_ ## FUNC (void)					\
    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 *)
@@ -169,14 +187,14 @@ 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 */
 
@@ -205,7 +223,7 @@ STATIC EH_FRAME_SECTION_CONST char __EH_FRAME_BEGIN__[]
 /* 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 */
 
@@ -219,6 +237,9 @@ STATIC void *__JCR_LIST__[]
    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
@@ -233,7 +254,7 @@ void *__dso_handle = 0;
 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
@@ -254,10 +275,6 @@ extern void __cxa_finalize (void *) TARGET_ATTRIBUTE_WEAK;
 static void __attribute__((used))
 __do_global_dtors_aux (void)
 {
-#ifndef FINI_ARRAY_SECTION_ASM_OP
-  static func_ptr *p = __DTOR_LIST__ + 1;
-  func_ptr f;
-#endif /* !defined(FINI_ARRAY_SECTION_ASM_OP)  */
   static _Bool completed;
 
   if (__builtin_expect (completed, 0))
@@ -271,12 +288,32 @@ __do_global_dtors_aux (void)
 #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) */
-  while ((f = *p))
-    {
-      p++;
-      f ();
-    }
+  {
+    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
@@ -297,11 +334,18 @@ __do_global_dtors_aux (void)
 /* 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
@@ -339,7 +383,7 @@ frame_dummy (void)
 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 */
@@ -447,7 +491,7 @@ 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__)) = { };
+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))))
@@ -460,14 +504,25 @@ STATIC func_ptr __CTOR_END__[1]
 
 #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
 
@@ -484,15 +539,15 @@ typedef short int32;
 #  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 */