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 * $Id$ 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 38 /* 39 * Auxiliary vector entries for passing information to the interpreter. 40 * 41 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 42 * but POSIX lays claim to all symbols ending with "_t". 43 */ 44 45 typedef struct { /* Auxiliary vector entry on initial stack */ 46 int a_type; /* Entry type. */ 47 union { 48 long a_val; /* Integer value. */ 49 void *a_ptr; /* Address. */ 50 void (*a_fcn)(void); /* Function pointer (not used). */ 51 } a_un; 52 } Elf32_Auxinfo; 53 54 /* Values for a_type. */ 55 #define AT_NULL 0 /* Terminates the vector. */ 56 #define AT_IGNORE 1 /* Ignored entry. */ 57 #define AT_EXECFD 2 /* File descriptor of program to load. */ 58 #define AT_PHDR 3 /* Program header of program already loaded. */ 59 #define AT_PHENT 4 /* Size of each program header entry. */ 60 #define AT_PHNUM 5 /* Number of program header entries. */ 61 #define AT_PAGESZ 6 /* Page size in bytes. */ 62 #define AT_BASE 7 /* Interpreter's base address. */ 63 #define AT_FLAGS 8 /* Flags (unused for i386). */ 64 #define AT_ENTRY 9 /* Where interpreter should transfer control. */ 65 66 /* 67 * The following non-standard values are used for passing information 68 * from John Polstra's testbed program to the dynamic linker. These 69 * are expected to go away soon. 70 * 71 * Unfortunately, these overlap the Linux non-standard values, so they 72 * must not be used in the same context. 73 */ 74 #define AT_BRK 10 /* Starting point for sbrk and brk. */ 75 #define AT_DEBUG 11 /* Debugging level. */ 76 77 /* 78 * The following non-standard values are used in Linux ELF binaries. 79 */ 80 #define AT_NOTELF 10 /* Program is not ELF ?? */ 81 #define AT_UID 11 /* Real uid. */ 82 #define AT_EUID 12 /* Effective uid. */ 83 #define AT_GID 13 /* Real gid. */ 84 #define AT_EGID 14 /* Effective gid. */ 85 86 #define AT_COUNT 15 /* Count of defined aux entry types. */ 87 88 /* 89 * Relocation types. 90 */ 91 92 #define R_386_NONE 0 /* No relocation. */ 93 #define R_386_32 1 /* Add symbol value. */ 94 #define R_386_PC32 2 /* Add PC-relative symbol value. */ 95 #define R_386_GOT32 3 /* Add PC-relative GOT offset. */ 96 #define R_386_PLT32 4 /* Add PC-relative PLT offset. */ 97 #define R_386_COPY 5 /* Copy data from shared object. */ 98 #define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */ 99 #define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */ 100 #define R_386_RELATIVE 8 /* Add load address of shared object. */ 101 #define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */ 102 #define R_386_GOTPC 10 /* Add PC-relative GOT table address. */ 103 104 #define R_386_COUNT 11 /* Count of defined relocation types. */ 105 106 #endif /* !_MACHINE_ELF_H_ */ 107