1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 * 29 * Global include file for all sgs ia32 based machine dependent macros, 30 * constants and declarations. 31 */ 32 33 #ifndef _MACHDEP_X86_H 34 #define _MACHDEP_X86_H 35 36 #include <link.h> 37 #include <sys/machelf.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* 44 * Elf header information. 45 */ 46 #define M_MACH_32 EM_386 47 #define M_MACH_64 EM_AMD64 48 49 #ifdef _ELF64 50 #define M_MACH EM_AMD64 51 #define M_CLASS ELFCLASS64 52 #else 53 #define M_MACH EM_386 54 #define M_CLASS ELFCLASS32 55 #endif 56 57 #define M_MACHPLUS M_MACH 58 #define M_DATA ELFDATA2LSB 59 #define M_FLAGSPLUS 0 60 61 /* 62 * Page boundary Macros: truncate to previous page boundary and round to 63 * next page boundary (refer to generic macros in ../sgs.h also). 64 */ 65 #define M_PTRUNC(X) ((X) & ~(syspagsz - 1)) 66 #define M_PROUND(X) (((X) + syspagsz - 1) & ~(syspagsz - 1)) 67 68 /* 69 * Segment boundary macros: truncate to previous segment boundary and round 70 * to next page boundary. 71 */ 72 #if defined(_ELF64) 73 #define M_SEGSIZE ELF_AMD64_MAXPGSZ 74 #else 75 #define M_SEGSIZE ELF_386_MAXPGSZ 76 #endif 77 78 #define M_STRUNC(X) ((X) & ~(M_SEGSIZE - 1)) 79 #define M_SROUND(X) (((X) + M_SEGSIZE - 1) & ~(M_SEGSIZE - 1)) 80 81 /* 82 * TLS static segments must be rounded to the following requirements, 83 * due to libthread stack allocation. 84 */ 85 #if defined(_ELF64) 86 #define M_TLSSTATALIGN 0x10 87 #else 88 #define M_TLSSTATALIGN 0x08 89 #endif 90 91 92 /* 93 * Other machine dependent entities 94 */ 95 #if defined(_ELF64) 96 #define M_SEGM_ALIGN 0x00010000 97 #else 98 #define M_SEGM_ALIGN ELF_386_MAXPGSZ 99 #endif 100 101 /* 102 * Values for IA32 objects 103 */ 104 105 /* 106 * Instruction encodings. 107 */ 108 #define M_INST_JMP 0xe9 109 #define M_INST_PUSHL 0x68 110 #define M_SPECIAL_INST 0xff 111 #define M_PUSHL_DISP 0x35 112 #define M_PUSHL_REG_DISP 0xb3 113 #define M_JMP_DISP_IND 0x25 114 #define M_JMP_REG_DISP_IND 0xa3 115 #define M_NOP 0x90 116 117 #define M_BIND_ADJ 1 /* adjustment for end of */ 118 /* elf_rtbndr() address */ 119 #ifdef _ELF64 120 #define M_WORD_ALIGN 8 121 #define M_SEGM_ORIGIN (Addr)0x00400000 /* default first segment offset */ 122 #else 123 124 #define M_WORD_ALIGN 4 125 126 #define M_STACK_GAP (0x08000000) 127 #define M_STACK_PGS (0x00048000) 128 #define M_SEGM_ORIGIN (Addr)(M_STACK_GAP + M_STACK_PGS) 129 #endif 130 131 132 /* 133 * Plt and Got information; the first few .got and .plt entries are reserved 134 * PLT[0] jump to dynamic linker 135 * GOT[0] address of _DYNAMIC 136 */ 137 #define M_PLT_ENTSIZE 16 /* plt entry size in bytes */ 138 #define M_PLT_ALIGN M_WORD_ALIGN /* alignment of .plt section */ 139 #define M_PLT_INSSIZE 6 /* single plt instruction size */ 140 #define M_PLT_RESERVSZ M_PLT_ENTSIZE /* PLT[0] reserved */ 141 142 #define M_GOT_XDYNAMIC 0 /* got index for _DYNAMIC */ 143 #define M_GOT_XLINKMAP 1 /* got index for link map */ 144 #define M_GOT_XRTLD 2 /* got index for rtbinder */ 145 #define M_GOT_XNumber 3 /* reserved no. of got entries */ 146 147 #ifdef _ELF64 148 #define M_GOT_ENTSIZE 8 /* got entry size in bytes */ 149 #else /* ELF32 */ 150 #define M_GOT_ENTSIZE 4 /* got entry size in bytes */ 151 #endif 152 153 /* 154 * Make common relocation information transparent to the common code 155 */ 156 #if defined(_ELF64) 157 #define M_REL_DT_TYPE DT_RELA /* .dynamic entry */ 158 #define M_REL_DT_SIZE DT_RELASZ /* .dynamic entry */ 159 #define M_REL_DT_ENT DT_RELAENT /* .dynamic entry */ 160 #define M_REL_DT_COUNT DT_RELACOUNT /* .dynamic entry */ 161 #define M_REL_SHT_TYPE SHT_RELA /* section header type */ 162 #define M_REL_ELF_TYPE ELF_T_RELA /* data buffer type */ 163 164 #else /* _ELF32 */ 165 #define M_REL_DT_TYPE DT_REL /* .dynamic entry */ 166 #define M_REL_DT_SIZE DT_RELSZ /* .dynamic entry */ 167 #define M_REL_DT_ENT DT_RELENT /* .dynamic entry */ 168 #define M_REL_DT_COUNT DT_RELCOUNT /* .dynamic entry */ 169 #define M_REL_SHT_TYPE SHT_REL /* section header type */ 170 #define M_REL_ELF_TYPE ELF_T_REL /* data buffer type */ 171 172 #endif /* ELF32 */ 173 174 /* 175 * Make common relocation types transparent to the common code 176 */ 177 #if defined(_ELF64) 178 #define M_R_NONE R_AMD64_NONE 179 #define M_R_GLOB_DAT R_AMD64_GLOB_DAT 180 #define M_R_COPY R_AMD64_COPY 181 #define M_R_RELATIVE R_AMD64_RELATIVE 182 #define M_R_JMP_SLOT R_AMD64_JUMP_SLOT 183 #define M_R_FPTR R_AMD64_NONE 184 #define M_R_ARRAYADDR R_AMD64_GLOB_DAT 185 #define M_R_NUM R_AMD64_NUM 186 #else 187 #define M_R_NONE R_386_NONE 188 #define M_R_GLOB_DAT R_386_GLOB_DAT 189 #define M_R_COPY R_386_COPY 190 #define M_R_RELATIVE R_386_RELATIVE 191 #define M_R_JMP_SLOT R_386_JMP_SLOT 192 #define M_R_FPTR R_386_NONE 193 #define M_R_ARRAYADDR R_386_GLOB_DAT 194 #define M_R_NUM R_386_NUM 195 #endif 196 197 /* 198 * The following are defined as M_R_NONE so that checks 199 * for these relocations can be performed in common code - although 200 * the checks are really only relevant to SPARC. 201 */ 202 #define M_R_REGISTER M_R_NONE 203 204 /* 205 * DT_REGISTER is not valid on i386 or amd64 206 */ 207 #define M_DT_REGISTER 0xffffffff 208 209 /* 210 * Make plt section information transparent to the common code. 211 */ 212 #define M_PLT_SHF_FLAGS (SHF_ALLOC | SHF_EXECINSTR) 213 214 /* 215 * Make data segment information transparent to the common code. 216 */ 217 #ifdef _ELF64 218 #define M_DATASEG_PERM (PF_R | PF_W) 219 #else 220 #define M_DATASEG_PERM (PF_R | PF_W | PF_X) 221 #endif 222 223 /* 224 * Define a set of identifies for special sections. These allow the sections 225 * to be ordered within the output file image. These values should be 226 * maintained consistently, where appropriate, in each platform specific header 227 * file. 228 * 229 * o null identifies that this section does not need to be added to the 230 * output image (ie. shared object sections or sections we're going to 231 * recreate (sym tables, string tables, relocations, etc.)). 232 * 233 * o any user defined section will be first in the associated segment. 234 * 235 * o interp and capabilities sections are next, as these are accessed 236 * immediately the first page of the image is mapped. 237 * 238 * o the syminfo, hash, dynsym, dynstr and rel's are grouped together as 239 * these will all be accessed first by ld.so.1 to perform relocations. 240 * 241 * o the got and dynamic are grouped together as these may also be 242 * accessed first by ld.so.1 to perform relocations, fill in DT_DEBUG 243 * (executables only), and .got[0]. 244 * 245 * o unknown sections (stabs, comments, etc.) go at the end. 246 * 247 * Note that .tlsbss/.bss are given the largest identifiers. This insures that 248 * if any unknown sections become associated to the same segment as the .bss, 249 * the .bss sections are always the last section in the segment. 250 */ 251 #define M_ID_NULL 0x00 252 #define M_ID_USER 0x01 253 254 #define M_ID_INTERP 0x03 /* SHF_ALLOC */ 255 #define M_ID_CAP 0x04 256 #define M_ID_UNWINDHDR 0x05 257 #define M_ID_UNWIND 0x06 258 #define M_ID_SYMINFO 0x07 259 #define M_ID_HASH 0x08 260 #define M_ID_LDYNSYM 0x09 /* always right before DYNSYM */ 261 #define M_ID_DYNSYM 0x0a 262 #define M_ID_DYNSTR 0x0b 263 #define M_ID_VERSION 0x0c 264 #define M_ID_DYNSORT 0x0d 265 #define M_ID_REL 0x0e 266 #define M_ID_PLT 0x0f /* SHF_ALLOC + SHF_EXECISNTR */ 267 #define M_ID_TEXT 0x10 268 #define M_ID_DATA 0x20 269 270 /* M_ID_USER 0x02 dual entry - listed above */ 271 #define M_ID_GOT 0x03 /* SHF_ALLOC + SHF_WRITE */ 272 #define M_ID_DYNAMIC 0x05 273 #define M_ID_ARRAY 0x06 274 275 #define M_ID_UNKNOWN 0xfb /* just before TLS */ 276 277 #define M_ID_TLS 0xfc /* just before bss */ 278 #define M_ID_TLSBSS 0xfd 279 #define M_ID_BSS 0xfe 280 #define M_ID_LBSS 0xff 281 282 #define M_ID_SYMTAB_NDX 0x02 /* ! SHF_ALLOC */ 283 #define M_ID_SYMTAB 0x03 284 #define M_ID_STRTAB 0x04 285 #define M_ID_DYNSYM_NDX 0x05 286 #define M_ID_NOTE 0x06 287 288 289 #ifdef __cplusplus 290 } 291 #endif 292 293 #endif /* _MACHDEP_X86_H */ 294