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/* darwin.cc - class loader stuff for Darwin.  */

/* Copyright (C) 2004  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>

struct mach_header;

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);

/* 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 mach_header *mh,

                                          intptr_t slide)

{

  char *fde;

  uint32_t sz;

  fde = getsectdatafromheader (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;