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diff --git a/9/platforms/android-21/arch-arm/usr/include/link.h b/9/platforms/android-21/arch-arm/usr/include/link.h
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+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef _LINK_H_
+#define _LINK_H_
+
+#include <sys/types.h>
+#include <elf.h>
+
+__BEGIN_DECLS
+
+#if __LP64__
+#define ElfW(type) Elf64_ ## type
+#else
+#define ElfW(type) Elf32_ ## type
+#endif
+
+struct dl_phdr_info {
+ ElfW(Addr) dlpi_addr;
+ const char* dlpi_name;
+ const ElfW(Phdr)* dlpi_phdr;
+ ElfW(Half) dlpi_phnum;
+};
+
+int dl_iterate_phdr(int (*)(struct dl_phdr_info*, size_t, void*), void*);
+
+#ifdef __arm__
+typedef long unsigned int* _Unwind_Ptr;
+_Unwind_Ptr dl_unwind_find_exidx(_Unwind_Ptr, int*);
+#endif
+
+/* Used by the dynamic linker to communicate with the debugger. */
+struct link_map {
+ ElfW(Addr) l_addr;
+ char* l_name;
+ ElfW(Dyn)* l_ld;
+ struct link_map* l_next;
+ struct link_map* l_prev;
+};
+
+/* Used by the dynamic linker to communicate with the debugger. */
+struct r_debug {
+ int32_t r_version;
+ struct link_map* r_map;
+ ElfW(Addr) r_brk;
+ enum {
+ RT_CONSISTENT,
+ RT_ADD,
+ RT_DELETE
+ } r_state;
+ ElfW(Addr) r_ldbase;
+};
+
+__END_DECLS
+
+#endif /* _LINK_H_ */