1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #ifndef _LINK_H_ 29 #define _LINK_H_ 30 31 #include <stdint.h> 32 #include <sys/cdefs.h> 33 #include <sys/types.h> 34 35 #include <elf.h> 36 37 __BEGIN_DECLS 38 39 #if defined(__LP64__) 40 #define ElfW(type) Elf64_ ## type 41 #else 42 #define ElfW(type) Elf32_ ## type 43 #endif 44 45 struct dl_phdr_info { 46 ElfW(Addr) dlpi_addr; 47 const char* _Nullable dlpi_name; 48 const ElfW(Phdr)* _Nullable dlpi_phdr; 49 ElfW(Half) dlpi_phnum; 50 51 // These fields were added in Android R. 52 unsigned long long dlpi_adds; 53 unsigned long long dlpi_subs; 54 size_t dlpi_tls_modid; 55 void* _Nullable dlpi_tls_data; 56 }; 57 58 #if defined(__arm__) 59 int dl_iterate_phdr(int (* _Nonnull __callback)(struct dl_phdr_info* _Nonnull, size_t, void* _Nullable), void* _Nullable __data) __INTRODUCED_IN(21); 60 #else 61 int dl_iterate_phdr(int (* _Nonnull __callback)(struct dl_phdr_info* _Nonnull, size_t, void*_Nullable ), void* _Nullable __data); 62 #endif 63 64 #ifdef __arm__ 65 typedef uintptr_t _Unwind_Ptr; 66 _Unwind_Ptr dl_unwind_find_exidx(_Unwind_Ptr, int* _Nonnull); 67 #endif 68 69 /* Used by the dynamic linker to communicate with the debugger. */ 70 struct link_map { 71 ElfW(Addr) l_addr; 72 char* _Nullable l_name; 73 ElfW(Dyn)* _Nullable l_ld; 74 struct link_map* _Nullable l_next; 75 struct link_map* _Nullable l_prev; 76 }; 77 78 /* Used by the dynamic linker to communicate with the debugger. */ 79 struct r_debug { 80 int32_t r_version; 81 struct link_map* _Nullable r_map; 82 ElfW(Addr) r_brk; 83 enum { 84 RT_CONSISTENT, 85 RT_ADD, 86 RT_DELETE 87 } r_state; 88 ElfW(Addr) r_ldbase; 89 }; 90 91 __END_DECLS 92 93 #endif 94