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