1 /*- 2 * Copyright (c) 1996-1997 John D. Polstra. 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 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_ELF_H_ 30 #define _MACHINE_ELF_H_ 1 31 32 /* 33 * ELF definitions for the i386 architecture. 34 */ 35 36 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 37 #if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64 38 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 39 #endif 40 41 #ifndef __ELF_WORD_SIZE 42 #define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ 43 #endif 44 45 #include <sys/elf_generic.h> 46 47 #define ELF_ARCH EM_386 48 49 #define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486) 50 51 /* 52 * Auxiliary vector entries for passing information to the interpreter. 53 * 54 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 55 * but POSIX lays claim to all symbols ending with "_t". 56 */ 57 58 typedef struct { /* Auxiliary vector entry on initial stack */ 59 int a_type; /* Entry type. */ 60 union { 61 long a_val; /* Integer value. */ 62 void *a_ptr; /* Address. */ 63 void (*a_fcn)(void); /* Function pointer (not used). */ 64 } a_un; 65 } Elf32_Auxinfo; 66 67 #if __ELF_WORD_SIZE == 64 68 /* Fake for amd64 loader support */ 69 typedef struct { 70 int fake; 71 } Elf64_Auxinfo; 72 #endif 73 74 __ElfType(Auxinfo); 75 76 /* Values for a_type. */ 77 #define AT_NULL 0 /* Terminates the vector. */ 78 #define AT_IGNORE 1 /* Ignored entry. */ 79 #define AT_EXECFD 2 /* File descriptor of program to load. */ 80 #define AT_PHDR 3 /* Program header of program already loaded. */ 81 #define AT_PHENT 4 /* Size of each program header entry. */ 82 #define AT_PHNUM 5 /* Number of program header entries. */ 83 #define AT_PAGESZ 6 /* Page size in bytes. */ 84 #define AT_BASE 7 /* Interpreter's base address. */ 85 #define AT_FLAGS 8 /* Flags (unused for i386). */ 86 #define AT_ENTRY 9 /* Where interpreter should transfer control. */ 87 88 /* 89 * The following non-standard values are used for passing information 90 * from John Polstra's testbed program to the dynamic linker. These 91 * are expected to go away soon. 92 * 93 * Unfortunately, these overlap the Linux non-standard values, so they 94 * must not be used in the same context. 95 */ 96 #define AT_BRK 10 /* Starting point for sbrk and brk. */ 97 #define AT_DEBUG 11 /* Debugging level. */ 98 99 /* 100 * The following non-standard values are used in Linux ELF binaries. 101 */ 102 #define AT_NOTELF 10 /* Program is not ELF ?? */ 103 #define AT_UID 11 /* Real uid. */ 104 #define AT_EUID 12 /* Effective uid. */ 105 #define AT_GID 13 /* Real gid. */ 106 #define AT_EGID 14 /* Effective gid. */ 107 108 #define AT_COUNT 15 /* Count of defined aux entry types. */ 109 110 /* 111 * Relocation types. 112 */ 113 114 #define R_386_NONE 0 /* No relocation. */ 115 #define R_386_32 1 /* Add symbol value. */ 116 #define R_386_PC32 2 /* Add PC-relative symbol value. */ 117 #define R_386_GOT32 3 /* Add PC-relative GOT offset. */ 118 #define R_386_PLT32 4 /* Add PC-relative PLT offset. */ 119 #define R_386_COPY 5 /* Copy data from shared object. */ 120 #define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */ 121 #define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */ 122 #define R_386_RELATIVE 8 /* Add load address of shared object. */ 123 #define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */ 124 #define R_386_GOTPC 10 /* Add PC-relative GOT table address. */ 125 #define R_386_TLS_TPOFF 14 /* Negative offset in static TLS block */ 126 #define R_386_TLS_IE 15 /* Absolute address of GOT for -ve static TLS */ 127 #define R_386_TLS_GOTIE 16 /* GOT entry for negative static TLS block */ 128 #define R_386_TLS_LE 17 /* Negative offset relative to static TLS */ 129 #define R_386_TLS_GD 18 /* 32 bit offset to GOT (index,off) pair */ 130 #define R_386_TLS_LDM 19 /* 32 bit offset to GOT (index,zero) pair */ 131 #define R_386_TLS_GD_32 24 /* 32 bit offset to GOT (index,off) pair */ 132 #define R_386_TLS_GD_PUSH 25 /* pushl instruction for Sun ABI GD sequence */ 133 #define R_386_TLS_GD_CALL 26 /* call instruction for Sun ABI GD sequence */ 134 #define R_386_TLS_GD_POP 27 /* popl instruction for Sun ABI GD sequence */ 135 #define R_386_TLS_LDM_32 28 /* 32 bit offset to GOT (index,zero) pair */ 136 #define R_386_TLS_LDM_PUSH 29 /* pushl instruction for Sun ABI LD sequence */ 137 #define R_386_TLS_LDM_CALL 30 /* call instruction for Sun ABI LD sequence */ 138 #define R_386_TLS_LDM_POP 31 /* popl instruction for Sun ABI LD sequence */ 139 #define R_386_TLS_LDO_32 32 /* 32 bit offset from start of TLS block */ 140 #define R_386_TLS_IE_32 33 /* 32 bit offset to GOT static TLS offset entry */ 141 #define R_386_TLS_LE_32 34 /* 32 bit offset within static TLS block */ 142 #define R_386_TLS_DTPMOD32 35 /* GOT entry containing TLS index */ 143 #define R_386_TLS_DTPOFF32 36 /* GOT entry containing TLS offset */ 144 #define R_386_TLS_TPOFF32 37 /* GOT entry of -ve static TLS offset */ 145 146 #define R_386_COUNT 38 /* Count of defined relocation types. */ 147 148 /* Define "machine" characteristics */ 149 #define ELF_TARG_CLASS ELFCLASS32 150 #define ELF_TARG_DATA ELFDATA2LSB 151 #define ELF_TARG_MACH EM_386 152 #define ELF_TARG_VER 1 153 154 #endif /* !_MACHINE_ELF_H_ */ 155