| | 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: src/sys/i386/include/elf.h,v 1.9.2.1 2001/11/03 01:41:08 ps Exp $ |
| | 27 | * $DragonFly: src/sys/cpu/i386/include/elf.h,v 1.3 2003/11/10 06:12:12 dillon Exp $ |
| | 28 | */ |
| | 29 | |
| | 30 | #ifndef _MACHINE_ELF_H_ |
| | 31 | #define _MACHINE_ELF_H_ 1 |
| | 32 | |
| | 33 | /* |
| | 34 | * ELF definitions for the i386 architecture. |
| | 35 | */ |
| | 36 | |
| | 37 | #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ |
| | 38 | #include <sys/elf64.h> /* Definitions common to all 32 bit architectures. */ |
| | 39 | |
| | 40 | #ifndef __ELF_WORD_SIZE |
| | 41 | #define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ |
| | 42 | #endif |
| | 43 | |
| | 44 | #include <sys/elf_generic.h> |
| | 45 | |
| | 46 | #define ELF_ARCH EM_386 |
| | 47 | |
| | 48 | #define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486) |
| | 49 | |
| | 50 | /* |
| | 51 | * Auxiliary vector entries for passing information to the interpreter. |
| | 52 | * |
| | 53 | * The i386 supplement to the SVR4 ABI specification names this "auxv_t", |
| | 54 | * but POSIX lays claim to all symbols ending with "_t". |
| | 55 | */ |
| | 56 | |
| | 57 | typedef struct { /* Auxiliary vector entry on initial stack */ |
| | 58 | int a_type; /* Entry type. */ |
| | 59 | union { |
| | 60 | long a_val; /* Integer value. */ |
| | 61 | void *a_ptr; /* Address. */ |
| | 62 | void (*a_fcn)(void); /* Function pointer (not used). */ |
| | 63 | } a_un; |
| | 64 | } Elf32_Auxinfo; |
| | 65 | |
| | 66 | #if __ELF_WORD_SIZE == 64 |
| | 67 | /* Fake for amd64 loader support */ |
| | 68 | typedef struct { |
| | 69 | int fake; |
| | 70 | } Elf64_Auxinfo; |
| | 71 | #endif |
| | 72 | |
| | 73 | __ElfType(Auxinfo); |
| | 74 | |
| | 75 | /* Values for a_type. */ |
| | 76 | #define AT_NULL 0 /* Terminates the vector. */ |
| | 77 | #define AT_IGNORE 1 /* Ignored entry. */ |
| | 78 | #define AT_EXECFD 2 /* File descriptor of program to load. */ |
| | 79 | #define AT_PHDR 3 /* Program header of program already loaded. */ |
| | 80 | #define AT_PHENT 4 /* Size of each program header entry. */ |
| | 81 | #define AT_PHNUM 5 /* Number of program header entries. */ |
| | 82 | #define AT_PAGESZ 6 /* Page size in bytes. */ |
| | 83 | #define AT_BASE 7 /* Interpreter's base address. */ |
| | 84 | #define AT_FLAGS 8 /* Flags (unused for i386). */ |
| | 85 | #define AT_ENTRY 9 /* Where interpreter should transfer control. */ |
| | 86 | |
| | 87 | /* |
| | 88 | * The following non-standard values are used for passing information |
| | 89 | * from John Polstra's testbed program to the dynamic linker. These |
| | 90 | * are expected to go away soon. |
| | 91 | * |
| | 92 | * Unfortunately, these overlap the Linux non-standard values, so they |
| | 93 | * must not be used in the same context. |
| | 94 | */ |
| | 95 | #define AT_BRK 10 /* Starting point for sbrk and brk. */ |
| | 96 | #define AT_DEBUG 11 /* Debugging level. */ |
| | 97 | |
| | 98 | /* |
| | 99 | * The following non-standard values are used in Linux ELF binaries. |
| | 100 | */ |
| | 101 | #define AT_NOTELF 10 /* Program is not ELF ?? */ |
| | 102 | #define AT_UID 11 /* Real uid. */ |
| | 103 | #define AT_EUID 12 /* Effective uid. */ |
| | 104 | #define AT_GID 13 /* Real gid. */ |
| | 105 | #define AT_EGID 14 /* Effective gid. */ |
| | 106 | |
| | 107 | #define AT_COUNT 15 /* Count of defined aux entry types. */ |
| | 108 | |
| | 109 | /* |
| | 110 | * Relocation types. |
| | 111 | */ |
| | 112 | |
| | 113 | #define R_386_NONE 0 /* No relocation. */ |
| | 114 | #define R_386_32 1 /* Add symbol value. */ |
| | 115 | #define R_386_PC32 2 /* Add PC-relative symbol value. */ |
| | 116 | #define R_386_GOT32 3 /* Add PC-relative GOT offset. */ |
| | 117 | #define R_386_PLT32 4 /* Add PC-relative PLT offset. */ |
| | 118 | #define R_386_COPY 5 /* Copy data from shared object. */ |
| | 119 | #define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */ |
| | 120 | #define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */ |
| | 121 | #define R_386_RELATIVE 8 /* Add load address of shared object. */ |
| | 122 | #define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */ |
| | 123 | #define R_386_GOTPC 10 /* Add PC-relative GOT table address. */ |
| | 124 | |
| | 125 | #define R_386_COUNT 11 /* Count of defined relocation types. */ |
| | 126 | |
| | 127 | /* Define "machine" characteristics */ |
| | 128 | #define ELF_TARG_CLASS ELFCLASS32 |
| | 129 | #define ELF_TARG_DATA ELFDATA2LSB |
| | 130 | #define ELF_TARG_MACH EM_386 |
| | 131 | #define ELF_TARG_VER 1 |
| | 132 | |
| | 133 | #ifdef _KERNEL |
| | 134 | |
| | 135 | /* |
| | 136 | * On the i386 we load the dynamic linker where a userland call |
| | 137 | * to mmap(0, ...) would put it. The rationale behind this |
| | 138 | * calculation is that it leaves room for the heap to grow to |
| | 139 | * its maximum allowed size. |
| | 140 | */ |
| | 141 | #define ELF_RTLD_ADDR(vmspace) \ |
| | 142 | (round_page((vm_offset_t)(vmspace)->vm_daddr + maxdsiz)) |
| | 143 | |
| | 144 | #endif /* _KERNEL */ |
| | 145 | #endif /* !_MACHINE_ELF_H_ */ |
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