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 LINKER_PHDR_H 29 #define LINKER_PHDR_H 30 31 /* Declarations related to the ELF program header table and segments. 32 * 33 * The design goal is to provide an API that is as close as possible 34 * to the ELF spec, and does not depend on linker-specific data 35 * structures (e.g. the exact layout of struct soinfo). 36 */ 37 38 #include "linker.h" 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 /* See linker_phdr.c for all usage documentation */ 45 46 int 47 phdr_table_load(int fd, 48 Elf32_Addr phdr_offset, 49 Elf32_Half phdr_num, 50 void** phdr_mmap, 51 Elf32_Addr* phdr_size, 52 const Elf32_Phdr** phdr_table); 53 54 void 55 phdr_table_unload(void* phdr_mmap, Elf32_Addr phdr_memsize); 56 57 Elf32_Addr 58 phdr_table_get_load_size(const Elf32_Phdr* phdr_table, 59 size_t phdr_count); 60 61 int 62 phdr_table_reserve_memory(const Elf32_Phdr* phdr_table, 63 size_t phdr_count, 64 void** load_start, 65 Elf32_Addr* load_size, 66 Elf32_Addr* load_bias); 67 68 int 69 phdr_table_load_segments(const Elf32_Phdr* phdr_table, 70 int phdr_count, 71 Elf32_Addr load_bias, 72 int fd); 73 74 int 75 phdr_table_protect_segments(const Elf32_Phdr* phdr_table, 76 int phdr_count, 77 Elf32_Addr load_bias); 78 79 int 80 phdr_table_unprotect_segments(const Elf32_Phdr* phdr_table, 81 int phdr_count, 82 Elf32_Addr load_bias); 83 84 int 85 phdr_table_protect_gnu_relro(const Elf32_Phdr* phdr_table, 86 int phdr_count, 87 Elf32_Addr load_bias); 88 89 const Elf32_Phdr* 90 phdr_table_get_loaded_phdr(const Elf32_Phdr* phdr_table, 91 int phdr_count, 92 Elf32_Addr load_bias); 93 94 #ifdef ANDROID_ARM_LINKER 95 int 96 phdr_table_get_arm_exidx(const Elf32_Phdr* phdr_table, 97 int phdr_count, 98 Elf32_Addr load_bias, 99 Elf32_Addr** arm_exidx, 100 unsigned* arm_exidix_count); 101 #endif 102 103 void 104 phdr_table_get_dynamic_section(const Elf32_Phdr* phdr_table, 105 int phdr_count, 106 Elf32_Addr load_bias, 107 Elf32_Addr** dynamic, 108 size_t* dynamic_count); 109 110 #ifdef __cplusplus 111 }; 112 #endif 113 114 #endif /* LINKER_PHDR_H */ 115