elf.h revision 77931
1179193Sjb/*- 2179193Sjb * Copyright (c) 1996-1997 John D. Polstra. 3179193Sjb * All rights reserved. 4179193Sjb * 5179193Sjb * Redistribution and use in source and binary forms, with or without 6179193Sjb * modification, are permitted provided that the following conditions 7179193Sjb * are met: 8179193Sjb * 1. Redistributions of source code must retain the above copyright 9179193Sjb * notice, this list of conditions and the following disclaimer. 10179193Sjb * 2. Redistributions in binary form must reproduce the above copyright 11179193Sjb * notice, this list of conditions and the following disclaimer in the 12179193Sjb * documentation and/or other materials provided with the distribution. 13179193Sjb * 14179193Sjb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15179193Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16179193Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17179193Sjb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18179193Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19179193Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20211738Srpaulo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21211738Srpaulo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22211738Srpaulo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23211738Srpaulo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24179193Sjb * SUCH DAMAGE. 25179193Sjb * 26179193Sjb * $FreeBSD: head/sys/i386/include/elf.h 77931 2001-06-09 05:21:17Z obrien $ 27179198Sjb */ 28179193Sjb 29179193Sjb#ifndef _MACHINE_ELF_H_ 30179193Sjb#define _MACHINE_ELF_H_ 1 31211738Srpaulo 32179193Sjb/* 33211738Srpaulo * ELF definitions for the i386 architecture. 34179193Sjb */ 35179193Sjb 36179193Sjb#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 37179193Sjb 38179193Sjb#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ 39179193Sjb#include <sys/elf_generic.h> 40179193Sjb 41211738Srpaulo#define ELF_ARCH EM_386 42179193Sjb 43211738Srpaulo#define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486) 44179193Sjb 45179193Sjb/* 46179193Sjb * Auxiliary vector entries for passing information to the interpreter. 47211738Srpaulo * 48179193Sjb * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 49211738Srpaulo * but POSIX lays claim to all symbols ending with "_t". 50179193Sjb */ 51179193Sjb 52179193Sjbtypedef struct { /* Auxiliary vector entry on initial stack */ 53179193Sjb int a_type; /* Entry type. */ 54179193Sjb union { 55179193Sjb long a_val; /* Integer value. */ 56179193Sjb void *a_ptr; /* Address. */ 57179193Sjb void (*a_fcn)(void); /* Function pointer (not used). */ 58211738Srpaulo } a_un; 59179193Sjb} Elf32_Auxinfo; 60211738Srpaulo 61211738Srpaulo__ElfType(Auxinfo); 62211738Srpaulo 63211738Srpaulo/* Values for a_type. */ 64211738Srpaulo#define AT_NULL 0 /* Terminates the vector. */ 65211738Srpaulo#define AT_IGNORE 1 /* Ignored entry. */ 66211738Srpaulo#define AT_EXECFD 2 /* File descriptor of program to load. */ 67211738Srpaulo#define AT_PHDR 3 /* Program header of program already loaded. */ 68179193Sjb#define AT_PHENT 4 /* Size of each program header entry. */ 69179193Sjb#define AT_PHNUM 5 /* Number of program header entries. */ 70179193Sjb#define AT_PAGESZ 6 /* Page size in bytes. */ 71179193Sjb#define AT_BASE 7 /* Interpreter's base address. */ 72179193Sjb#define AT_FLAGS 8 /* Flags (unused for i386). */ 73179193Sjb#define AT_ENTRY 9 /* Where interpreter should transfer control. */ 74179193Sjb 75179193Sjb/* 76179193Sjb * The following non-standard values are used for passing information 77179193Sjb * from John Polstra's testbed program to the dynamic linker. These 78179193Sjb * are expected to go away soon. 79179193Sjb * 80179193Sjb * Unfortunately, these overlap the Linux non-standard values, so they 81179193Sjb * must not be used in the same context. 82179193Sjb */ 83179193Sjb#define AT_BRK 10 /* Starting point for sbrk and brk. */ 84179193Sjb#define AT_DEBUG 11 /* Debugging level. */ 85179193Sjb 86179193Sjb/* 87179193Sjb * The following non-standard values are used in Linux ELF binaries. 88179193Sjb */ 89179193Sjb#define AT_NOTELF 10 /* Program is not ELF ?? */ 90179193Sjb#define AT_UID 11 /* Real uid. */ 91179193Sjb#define AT_EUID 12 /* Effective uid. */ 92179193Sjb#define AT_GID 13 /* Real gid. */ 93179193Sjb#define AT_EGID 14 /* Effective gid. */ 94179193Sjb 95179193Sjb#define AT_COUNT 15 /* Count of defined aux entry types. */ 96179193Sjb 97179193Sjb/* 98179193Sjb * Relocation types. 99179193Sjb */ 100179193Sjb 101179193Sjb#define R_386_NONE 0 /* No relocation. */ 102179193Sjb#define R_386_32 1 /* Add symbol value. */ 103179193Sjb#define R_386_PC32 2 /* Add PC-relative symbol value. */ 104179193Sjb#define R_386_GOT32 3 /* Add PC-relative GOT offset. */ 105179193Sjb#define R_386_PLT32 4 /* Add PC-relative PLT offset. */ 106179193Sjb#define R_386_COPY 5 /* Copy data from shared object. */ 107179193Sjb#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */ 108179193Sjb#define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */ 109179193Sjb#define R_386_RELATIVE 8 /* Add load address of shared object. */ 110179193Sjb#define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */ 111179193Sjb#define R_386_GOTPC 10 /* Add PC-relative GOT table address. */ 112179193Sjb 113179193Sjb#define R_386_COUNT 11 /* Count of defined relocation types. */ 114179193Sjb 115179193Sjb/* Define "machine" characteristics */ 116179193Sjb#define ELF_TARG_CLASS ELFCLASS32 117179193Sjb#define ELF_TARG_DATA ELFDATA2LSB 118179193Sjb#define ELF_TARG_MACH EM_386 119179193Sjb#define ELF_TARG_VER 1 120179193Sjb 121179193Sjb#ifdef _KERNEL 122179193Sjb 123179193Sjb/* 124179193Sjb * On the i386 we load the dynamic linker where a userland call 125179193Sjb * to mmap(0, ...) would put it. The rationale behind this 126179193Sjb * calculation is that it leaves room for the heap to grow to 127179193Sjb * its maximum allowed size. 128179193Sjb */ 129179193Sjb#define ELF_RTLD_ADDR(vmspace) \ 130179193Sjb (round_page((vm_offset_t)(vmspace)->vm_daddr + MAXDSIZ)) 131179193Sjb 132179193Sjb#endif /* _KERNEL */ 133179193Sjb#endif /* !_MACHINE_ELF_H_ */ 134179193Sjb