Add gcc-4.6. Synced to @180989

Change-Id: Ie3676586e1d8e3c8cd9f07d022f450d05fa08439
svn://gcc.gnu.org/svn/gcc/branches/google/gcc-4_6-mobile

1 files changed, 80 insertions, 0 deletions

diff --git a/gcc-4.6/libjava/darwin.cc b/gcc-4.6/libjava/darwin.cc
new file mode 100644
index 000000000..f6406b375
--- /dev/null
+++ b/gcc-4.6/libjava/darwin.cc
@@ -0,0 +1,80 @@
+/* darwin.cc - class loader stuff for Darwin.  */
+
+/* Copyright (C) 2004, 2007  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+#include <config.h>
+
+#include <jvm.h>
+
+/* In theory, we should be able to do:
+   #include <mach-o/getsect.h>
+   #include <mach-o/dyld.h>
+
+   but all the types in these headers changed between Panther and Tiger,
+   so the only way to be avoid type mismatches is to declare the routines
+   ourself.  */
+
+#include <stdint.h>
+#if !defined (__LP64__)
+  struct mach_header;
+# define JAVA_MACH_HEADER mach_header
+# define  mh_size_t uint32_t
+  extern "C" void _dyld_register_func_for_add_image
+    (void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide));
+  extern "C" void _dyld_register_func_for_remove_image
+    (void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide));
+  extern "C" char *getsectdatafromheader
+    (const struct mach_header *mhp, const char *segname, const char *sectname,
+     uint32_t *size);
+# define GETSECTDATA getsectdatafromheader
+#else
+  struct mach_header_64;
+# define JAVA_MACH_HEADER mach_header_64
+# define mh_size_t uint64_t
+  extern "C" void _dyld_register_func_for_add_image
+    (void (*func)(const struct mach_header_64 *mh, intptr_t vmaddr_slide));
+  extern "C" void _dyld_register_func_for_remove_image
+    (void (*func)(const struct mach_header_64 *mh, intptr_t vmaddr_slide));
+  extern "C" char *getsectdatafromheader_64
+    (const struct mach_header_64 *mhp, const char *segname,
+     const char *sectname, uint64_t *size);
+# define GETSECTDATA getsectdatafromheader_64
+#endif
+
+/* When a new image is loaded, look to see if it has a jcr section
+   and if so register the classes listed in it.  */
+
+static void
+darwin_java_register_dyld_add_image_hook (const struct JAVA_MACH_HEADER *mh,
+					  intptr_t slide)
+{
+  char *fde;
+  mh_size_t sz;
+
+  fde = GETSECTDATA (mh, "__DATA", "jcr", &sz);
+  if (! fde)
+    return;
+  
+  /* As far as I can tell, you're only supposed to load shared
+     libraries while having a lock on java.lang.Class.  So there's
+     no need to synchronize on anything here.  (I'm not sure how exactly
+     you can ensure this given lazy library loading.  FIXME.)  */
+ 
+  _Jv_RegisterClasses_Counted ((const jclass *) (fde + slide),
+			       sz / sizeof (jclass *));
+}
+
+static struct darwin_constructor_s{
+  darwin_constructor_s() 
+  {
+    _dyld_register_func_for_add_image 
+      (darwin_java_register_dyld_add_image_hook);
+    /* At present, you mustn't unload any java plugin.  */
+  };
+} darwin_constructor;