| 1 | /*-
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| 2 | * Copyright (c) 1996-1998 John D. Polstra.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | *
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| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 24 | * SUCH DAMAGE.
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| 25 | *
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| 26 | * $FreeBSD: src/sys/sys/elf64.h,v 1.10 2002/05/30 08:32:18 dfr Exp $
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| 27 | */
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| 28 |
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| 29 | #ifndef __kLdrModELF64_h__
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| 30 | #define __kLdrModELF64_h__
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| 31 |
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| 32 | #include "kLdrBase.h"
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| 33 | #include "kLdrModELFCommon.h"
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| 34 |
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| 35 | /*
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| 36 | * ELF definitions common to all 64-bit architectures.
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| 37 | */
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| 38 |
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| 39 | typedef uint64_t Elf64_Addr;
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| 40 | typedef uint32_t Elf64_Half;
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| 41 | typedef uint64_t Elf64_Off;
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| 42 | typedef int64_t Elf64_Sword;
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| 43 | typedef uint64_t Elf64_Word;
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| 44 | typedef uint64_t Elf64_Size;
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| 45 | typedef uint16_t Elf64_Quarter;
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| 46 |
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| 47 | /*
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| 48 | * Types of dynamic symbol hash table bucket and chain elements.
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| 49 | *
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| 50 | * This is inconsistent among 64 bit architectures, so a machine dependent
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| 51 | * typedef is required.
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| 52 | */
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| 53 |
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| 54 | #ifdef __alpha__
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| 55 | typedef Elf64_Off Elf64_Hashelt;
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| 56 | #else
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| 57 | typedef Elf64_Half Elf64_Hashelt;
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| 58 | #endif
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| 59 |
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| 60 | /*
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| 61 | * ELF header.
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| 62 | */
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| 63 |
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| 64 | typedef struct {
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| 65 | unsigned char e_ident[EI_NIDENT]; /* File identification. */
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| 66 | Elf64_Quarter e_type; /* File type. */
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| 67 | Elf64_Quarter e_machine; /* Machine architecture. */
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| 68 | Elf64_Half e_version; /* ELF format version. */
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| 69 | Elf64_Addr e_entry; /* Entry point. */
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| 70 | Elf64_Off e_phoff; /* Program header file offset. */
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| 71 | Elf64_Off e_shoff; /* Section header file offset. */
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| 72 | Elf64_Half e_flags; /* Architecture-specific flags. */
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| 73 | Elf64_Quarter e_ehsize; /* Size of ELF header in bytes. */
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| 74 | Elf64_Quarter e_phentsize; /* Size of program header entry. */
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| 75 | Elf64_Quarter e_phnum; /* Number of program header entries. */
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| 76 | Elf64_Quarter e_shentsize; /* Size of section header entry. */
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| 77 | Elf64_Quarter e_shnum; /* Number of section header entries. */
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| 78 | Elf64_Quarter e_shstrndx; /* Section name strings section. */
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| 79 | } Elf64_Ehdr;
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| 80 |
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| 81 | /*
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| 82 | * Section header.
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| 83 | */
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| 84 |
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| 85 | typedef struct {
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| 86 | Elf64_Half sh_name; /* Section name (index into the
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| 87 | section header string table). */
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| 88 | Elf64_Half sh_type; /* Section type. */
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| 89 | Elf64_Size sh_flags; /* Section flags. */
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| 90 | Elf64_Addr sh_addr; /* Address in memory image. */
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| 91 | Elf64_Off sh_offset; /* Offset in file. */
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| 92 | Elf64_Size sh_size; /* Size in bytes. */
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| 93 | Elf64_Half sh_link; /* Index of a related section. */
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| 94 | Elf64_Half sh_info; /* Depends on section type. */
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| 95 | Elf64_Size sh_addralign; /* Alignment in bytes. */
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| 96 | Elf64_Size sh_entsize; /* Size of each entry in section. */
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| 97 | } Elf64_Shdr;
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| 98 |
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| 99 | /*
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| 100 | * Program header.
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| 101 | */
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| 102 |
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| 103 | typedef struct {
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| 104 | Elf64_Half p_type; /* Entry type. */
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| 105 | Elf64_Half p_flags; /* Access permission flags. */
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| 106 | Elf64_Off p_offset; /* File offset of contents. */
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| 107 | Elf64_Addr p_vaddr; /* Virtual address in memory image. */
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| 108 | Elf64_Addr p_paddr; /* Physical address (not used). */
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| 109 | Elf64_Size p_filesz; /* Size of contents in file. */
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| 110 | Elf64_Size p_memsz; /* Size of contents in memory. */
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| 111 | Elf64_Size p_align; /* Alignment in memory and file. */
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| 112 | } Elf64_Phdr;
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| 113 |
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| 114 | /*
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| 115 | * Dynamic structure. The ".dynamic" section contains an array of them.
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| 116 | */
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| 117 |
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| 118 | typedef struct {
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| 119 | Elf64_Size d_tag; /* Entry type. */
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| 120 | union {
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| 121 | Elf64_Size d_val; /* Integer value. */
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| 122 | Elf64_Addr d_ptr; /* Address value. */
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| 123 | } d_un;
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| 124 | } Elf64_Dyn;
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| 125 |
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| 126 | /*
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| 127 | * Relocation entries.
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| 128 | */
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| 129 |
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| 130 | /* Relocations that don't need an addend field. */
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| 131 | typedef struct {
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| 132 | Elf64_Addr r_offset; /* Location to be relocated. */
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| 133 | Elf64_Size r_info; /* Relocation type and symbol index. */
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| 134 | } Elf64_Rel;
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| 135 |
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| 136 | /* Relocations that need an addend field. */
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| 137 | typedef struct {
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| 138 | Elf64_Addr r_offset; /* Location to be relocated. */
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| 139 | Elf64_Size r_info; /* Relocation type and symbol index. */
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| 140 | Elf64_Off r_addend; /* Addend. */
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| 141 | } Elf64_Rela;
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| 142 |
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| 143 | /* Macros for accessing the fields of r_info. */
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| 144 | #define ELF64_R_SYM(info) ((info) >> 32)
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| 145 | #define ELF64_R_TYPE(info) ((unsigned char)(info))
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| 146 |
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| 147 | /* Macro for constructing r_info from field values. */
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| 148 | #define ELF64_R_INFO(sym, type) (((sym) << 32) + (unsigned char)(type))
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| 149 |
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| 150 | /*
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| 151 | * Symbol table entries.
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| 152 | */
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| 153 |
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| 154 | typedef struct {
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| 155 | Elf64_Half st_name; /* String table index of name. */
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| 156 | unsigned char st_info; /* Type and binding information. */
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| 157 | unsigned char st_other; /* Reserved (not used). */
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| 158 | Elf64_Quarter st_shndx; /* Section index of symbol. */
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| 159 | Elf64_Addr st_value; /* Symbol value. */
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| 160 | Elf64_Size st_size; /* Size of associated object. */
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| 161 | } Elf64_Sym;
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| 162 |
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| 163 | /* Macros for accessing the fields of st_info. */
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| 164 | #define ELF64_ST_BIND(info) ((info) >> 4)
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| 165 | #define ELF64_ST_TYPE(info) ((info) & 0xf)
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| 166 |
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| 167 | /* Macro for constructing st_info from field values. */
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| 168 | #define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
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| 169 |
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| 170 | #endif
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| 171 |
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