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 2009 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 /* 121 * Provide default starting addresses. 64-bit programs can also be restricted 122 * to a 32-bit address space (SF1_SUNW_ADDR32), and these programs provide an 123 * alternative origin. 124 */ 125 #define M_SEGM_ORIGIN (Addr)0x400000ULL /* default 1st segment origin */ 126 #define M_SEGM_AORIGIN (Addr)0x10000ULL /* alternative 1st segment */ 127 /* origin */ 128 #define M_WORD_ALIGN 8 129 #else 130 #define M_STACK_GAP (0x08000000) 131 #define M_STACK_PGS (0x00048000) 132 #define M_SEGM_ORIGIN (Addr)(M_STACK_GAP + M_STACK_PGS) 133 #define M_SEGM_AORIGIN M_SEGM_ORIGIN 134 #define M_WORD_ALIGN 4 135 #endif 136 137 138 /* 139 * Plt and Got information; the first few .got and .plt entries are reserved 140 * PLT[0] jump to dynamic linker 141 * GOT[0] address of _DYNAMIC 142 */ 143 #define M_PLT_ENTSIZE 16 /* plt entry size in bytes */ 144 #define M_PLT_ALIGN M_WORD_ALIGN /* alignment of .plt section */ 145 #define M_PLT_INSSIZE 6 /* single plt instruction size */ 146 #define M_PLT_RESERVSZ M_PLT_ENTSIZE /* PLT[0] reserved */ 147 148 #define M_GOT_XDYNAMIC 0 /* got index for _DYNAMIC */ 149 #define M_GOT_XLINKMAP 1 /* got index for link map */ 150 #define M_GOT_XRTLD 2 /* got index for rtbinder */ 151 #define M_GOT_XNumber 3 /* reserved no. of got entries */ 152 153 #ifdef _ELF64 154 #define M_GOT_ENTSIZE 8 /* got entry size in bytes */ 155 #else /* ELF32 */ 156 #define M_GOT_ENTSIZE 4 /* got entry size in bytes */ 157 #endif 158 159 /* 160 * Make common relocation information transparent to the common code 161 */ 162 #if defined(_ELF64) 163 #define M_REL_DT_TYPE DT_RELA /* .dynamic entry */ 164 #define M_REL_DT_SIZE DT_RELASZ /* .dynamic entry */ 165 #define M_REL_DT_ENT DT_RELAENT /* .dynamic entry */ 166 #define M_REL_DT_COUNT DT_RELACOUNT /* .dynamic entry */ 167 #define M_REL_SHT_TYPE SHT_RELA /* section header type */ 168 #define M_REL_ELF_TYPE ELF_T_RELA /* data buffer type */ 169 170 #else /* _ELF32 */ 171 #define M_REL_DT_TYPE DT_REL /* .dynamic entry */ 172 #define M_REL_DT_SIZE DT_RELSZ /* .dynamic entry */ 173 #define M_REL_DT_ENT DT_RELENT /* .dynamic entry */ 174 #define M_REL_DT_COUNT DT_RELCOUNT /* .dynamic entry */ 175 #define M_REL_SHT_TYPE SHT_REL /* section header type */ 176 #define M_REL_ELF_TYPE ELF_T_REL /* data buffer type */ 177 178 #endif /* ELF32 */ 179 180 /* 181 * Make common relocation types transparent to the common code 182 */ 183 #if defined(_ELF64) 184 #define M_R_NONE R_AMD64_NONE 185 #define M_R_GLOB_DAT R_AMD64_GLOB_DAT 186 #define M_R_COPY R_AMD64_COPY 187 #define M_R_RELATIVE R_AMD64_RELATIVE 188 #define M_R_JMP_SLOT R_AMD64_JUMP_SLOT 189 #define M_R_FPTR R_AMD64_NONE 190 #define M_R_ARRAYADDR R_AMD64_GLOB_DAT 191 #define M_R_NUM R_AMD64_NUM 192 #else 193 #define M_R_NONE R_386_NONE 194 #define M_R_GLOB_DAT R_386_GLOB_DAT 195 #define M_R_COPY R_386_COPY 196 #define M_R_RELATIVE R_386_RELATIVE 197 #define M_R_JMP_SLOT R_386_JMP_SLOT 198 #define M_R_FPTR R_386_NONE 199 #define M_R_ARRAYADDR R_386_GLOB_DAT 200 #define M_R_NUM R_386_NUM 201 #endif 202 203 /* 204 * The following are defined as M_R_NONE so that checks 205 * for these relocations can be performed in common code - although 206 * the checks are really only relevant to SPARC. 207 */ 208 #define M_R_REGISTER M_R_NONE 209 210 /* 211 * DT_REGISTER is not valid on i386 or amd64 212 */ 213 #define M_DT_REGISTER 0xffffffff 214 215 /* 216 * Make plt section information transparent to the common code. 217 */ 218 #define M_PLT_SHF_FLAGS (SHF_ALLOC | SHF_EXECINSTR) 219 220 /* 221 * Make data segment information transparent to the common code. 222 */ 223 #ifdef _ELF64 224 #define M_DATASEG_PERM (PF_R | PF_W) 225 #else 226 #define M_DATASEG_PERM (PF_R | PF_W | PF_X) 227 #endif 228 229 /* 230 * Define a set of identifies for special sections. These allow the sections 231 * to be ordered within the output file image. These values should be 232 * maintained consistently, where appropriate, in each platform specific header 233 * file. 234 * 235 * o null identifies that this section does not need to be added to the 236 * output image (ie. shared object sections or sections we're going to 237 * recreate (sym tables, string tables, relocations, etc.)). 238 * 239 * o any user defined section will be first in the associated segment. 240 * 241 * o interp and capabilities sections are next, as these are accessed 242 * immediately the first page of the image is mapped. 243 * 244 * o the syminfo, hash, dynsym, dynstr and rel's are grouped together as 245 * these will all be accessed first by ld.so.1 to perform relocations. 246 * 247 * o the got and dynamic are grouped together as these may also be 248 * accessed first by ld.so.1 to perform relocations, fill in DT_DEBUG 249 * (executables only), and .got[0]. 250 * 251 * o unknown sections (stabs, comments, etc.) go at the end. 252 * 253 * Note that .tlsbss/.bss are given the largest identifiers. This insures that 254 * if any unknown sections become associated to the same segment as the .bss, 255 * the .bss sections are always the last section in the segment. 256 */ 257 #define M_ID_NULL 0x00 258 #define M_ID_USER 0x01 259 260 #define M_ID_INTERP 0x03 /* SHF_ALLOC */ 261 #define M_ID_CAP 0x04 262 #define M_ID_UNWINDHDR 0x05 263 #define M_ID_UNWIND 0x06 264 #define M_ID_SYMINFO 0x07 265 #define M_ID_HASH 0x08 266 #define M_ID_LDYNSYM 0x09 /* always right before DYNSYM */ 267 #define M_ID_DYNSYM 0x0a 268 #define M_ID_DYNSTR 0x0b 269 #define M_ID_VERSION 0x0c 270 #define M_ID_DYNSORT 0x0d 271 #define M_ID_REL 0x0e 272 #define M_ID_PLT 0x0f /* SHF_ALLOC + SHF_EXECISNTR */ 273 #define M_ID_TEXT 0x10 274 #define M_ID_DATA 0x20 275 276 /* M_ID_USER 0x02 dual entry - listed above */ 277 #define M_ID_GOT 0x03 /* SHF_ALLOC + SHF_WRITE */ 278 #define M_ID_DYNAMIC 0x05 279 #define M_ID_ARRAY 0x06 280 281 #define M_ID_UNKNOWN 0xfb /* just before TLS */ 282 283 #define M_ID_TLS 0xfc /* just before bss */ 284 #define M_ID_TLSBSS 0xfd 285 #define M_ID_BSS 0xfe 286 #define M_ID_LBSS 0xff 287 288 #define M_ID_SYMTAB_NDX 0x02 /* ! SHF_ALLOC */ 289 #define M_ID_SYMTAB 0x03 290 #define M_ID_STRTAB 0x04 291 #define M_ID_DYNSYM_NDX 0x05 292 #define M_ID_NOTE 0x06 293 294 295 #ifdef __cplusplus 296 } 297 #endif 298 299 #endif /* _MACHDEP_X86_H */ 300