elf.h revision 40513
121308Sache/*- 221308Sache * Copyright (c) 1996-1997 John D. Polstra. 321308Sache * All rights reserved. 421308Sache * 521308Sache * Redistribution and use in source and binary forms, with or without 621308Sache * modification, are permitted provided that the following conditions 721308Sache * are met: 821308Sache * 1. Redistributions of source code must retain the above copyright 921308Sache * notice, this list of conditions and the following disclaimer. 1021308Sache * 2. Redistributions in binary form must reproduce the above copyright 1121308Sache * notice, this list of conditions and the following disclaimer in the 1221308Sache * documentation and/or other materials provided with the distribution. 1321308Sache * 1421308Sache * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1521308Sache * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1621308Sache * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1721308Sache * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1821308Sache * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1921308Sache * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2021308Sache * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2158310Sache * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2221308Sache * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2321308Sache * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2421308Sache * SUCH DAMAGE. 2521308Sache * 2621308Sache * $Id: elf.h,v 1.4 1998/09/14 20:30:12 jdp Exp $ 2721308Sache */ 2821308Sache 2921308Sache#ifndef _MACHINE_ELF_H_ 3075406Sache#define _MACHINE_ELF_H_ 1 3175406Sache 3275406Sache/* 3321308Sache * ELF definitions for the i386 architecture. 3421308Sache */ 3521308Sache 3621308Sache#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 3721308Sache 3821308Sache#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ 3921308Sache#include <sys/elf_generic.h> 4021308Sache 4121308Sache#define ELF_ARCH EM_386 4221308Sache 4321308Sache#define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486) 4421308Sache 45/* 46 * Auxiliary vector entries for passing information to the interpreter. 47 * 48 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 49 * but POSIX lays claim to all symbols ending with "_t". 50 */ 51 52typedef struct { /* Auxiliary vector entry on initial stack */ 53 int a_type; /* Entry type. */ 54 union { 55 long a_val; /* Integer value. */ 56 void *a_ptr; /* Address. */ 57 void (*a_fcn)(void); /* Function pointer (not used). */ 58 } a_un; 59} Elf32_Auxinfo; 60 61__ElfType(Auxinfo); 62 63/* Values for a_type. */ 64#define AT_NULL 0 /* Terminates the vector. */ 65#define AT_IGNORE 1 /* Ignored entry. */ 66#define AT_EXECFD 2 /* File descriptor of program to load. */ 67#define AT_PHDR 3 /* Program header of program already loaded. */ 68#define AT_PHENT 4 /* Size of each program header entry. */ 69#define AT_PHNUM 5 /* Number of program header entries. */ 70#define AT_PAGESZ 6 /* Page size in bytes. */ 71#define AT_BASE 7 /* Interpreter's base address. */ 72#define AT_FLAGS 8 /* Flags (unused for i386). */ 73#define AT_ENTRY 9 /* Where interpreter should transfer control. */ 74 75/* 76 * The following non-standard values are used for passing information 77 * from John Polstra's testbed program to the dynamic linker. These 78 * are expected to go away soon. 79 * 80 * Unfortunately, these overlap the Linux non-standard values, so they 81 * must not be used in the same context. 82 */ 83#define AT_BRK 10 /* Starting point for sbrk and brk. */ 84#define AT_DEBUG 11 /* Debugging level. */ 85 86/* 87 * The following non-standard values are used in Linux ELF binaries. 88 */ 89#define AT_NOTELF 10 /* Program is not ELF ?? */ 90#define AT_UID 11 /* Real uid. */ 91#define AT_EUID 12 /* Effective uid. */ 92#define AT_GID 13 /* Real gid. */ 93#define AT_EGID 14 /* Effective gid. */ 94 95#define AT_COUNT 15 /* Count of defined aux entry types. */ 96 97/* 98 * Relocation types. 99 */ 100 101#define R_386_NONE 0 /* No relocation. */ 102#define R_386_32 1 /* Add symbol value. */ 103#define R_386_PC32 2 /* Add PC-relative symbol value. */ 104#define R_386_GOT32 3 /* Add PC-relative GOT offset. */ 105#define R_386_PLT32 4 /* Add PC-relative PLT offset. */ 106#define R_386_COPY 5 /* Copy data from shared object. */ 107#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */ 108#define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */ 109#define R_386_RELATIVE 8 /* Add load address of shared object. */ 110#define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */ 111#define R_386_GOTPC 10 /* Add PC-relative GOT table address. */ 112 113#define R_386_COUNT 11 /* Count of defined relocation types. */ 114 115/* Define "machine" characteristics */ 116#define ELF_TARG_CLASS ELFCLASS32 117#define ELF_TARG_DATA ELFDATA2LSB 118#define ELF_TARG_MACH EM_386 119#define ELF_TARG_VER 1 120 121#endif /* !_MACHINE_ELF_H_ */ 122