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 * Relocation type macros. 83 */ 84 #if defined(_ELF64) 85 #define M_RELOC Rela 86 #else 87 #define M_RELOC Rel 88 #endif 89 90 /* 91 * TLS static segments must be rounded to the following requirements, 92 * due to libthread stack allocation. 93 */ 94 #if defined(_ELF64) 95 #define M_TLSSTATALIGN 0x10 96 #else 97 #define M_TLSSTATALIGN 0x08 98 #endif 99 100 /* 101 * Other machine dependent entities 102 */ 103 #if defined(_ELF64) 104 #define M_SEGM_ALIGN 0x00010000 105 #else 106 #define M_SEGM_ALIGN ELF_386_MAXPGSZ 107 #endif 108 109 /* 110 * Values for IA32 objects 111 */ 112 113 /* 114 * Instruction encodings. 115 */ 116 #define M_INST_JMP 0xe9 117 #define M_INST_PUSHL 0x68 118 #define M_SPECIAL_INST 0xff 119 #define M_PUSHL_DISP 0x35 120 #define M_PUSHL_REG_DISP 0xb3 121 #define M_JMP_DISP_IND 0x25 122 #define M_JMP_REG_DISP_IND 0xa3 123 #define M_NOP 0x90 124 125 #define M_BIND_ADJ 1 /* adjustment for end of */ 126 /* elf_rtbndr() address */ 127 #ifdef _ELF64 128 /* 129 * Provide default starting addresses. 64-bit programs can also be restricted 130 * to a 32-bit address space (SF1_SUNW_ADDR32), and these programs provide an 131 * alternative origin. 132 */ 133 #define M_SEGM_ORIGIN (Addr)0x400000ULL /* default 1st segment origin */ 134 #define M_SEGM_AORIGIN (Addr)0x10000ULL /* alternative 1st segment */ 135 /* origin */ 136 #define M_WORD_ALIGN 8 137 #else 138 #define M_STACK_GAP (0x08000000) 139 #define M_STACK_PGS (0x00048000) 140 #define M_SEGM_ORIGIN (Addr)(M_STACK_GAP + M_STACK_PGS) 141 #define M_SEGM_AORIGIN M_SEGM_ORIGIN 142 #define M_WORD_ALIGN 4 143 #endif 144 145 146 /* 147 * Plt and Got information; the first few .got and .plt entries are reserved 148 * PLT[0] jump to dynamic linker 149 * GOT[0] address of _DYNAMIC 150 */ 151 #define M_PLT_ENTSIZE 16 /* plt entry size in bytes */ 152 #define M_PLT_ALIGN M_WORD_ALIGN /* alignment of .plt section */ 153 #define M_PLT_INSSIZE 6 /* single plt instruction size */ 154 #define M_PLT_RESERVSZ M_PLT_ENTSIZE /* PLT[0] reserved */ 155 156 #define M_GOT_XDYNAMIC 0 /* got index for _DYNAMIC */ 157 #define M_GOT_XLINKMAP 1 /* got index for link map */ 158 #define M_GOT_XRTLD 2 /* got index for rtbinder */ 159 #define M_GOT_XNumber 3 /* reserved no. of got entries */ 160 161 #ifdef _ELF64 162 #define M_GOT_ENTSIZE 8 /* got entry size in bytes */ 163 #else /* ELF32 */ 164 #define M_GOT_ENTSIZE 4 /* got entry size in bytes */ 165 #endif 166 167 /* 168 * Make common relocation information transparent to the common code 169 */ 170 #if defined(_ELF64) 171 #define M_REL_DT_TYPE DT_RELA /* .dynamic entry */ 172 #define M_REL_DT_SIZE DT_RELASZ /* .dynamic entry */ 173 #define M_REL_DT_ENT DT_RELAENT /* .dynamic entry */ 174 #define M_REL_DT_COUNT DT_RELACOUNT /* .dynamic entry */ 175 #define M_REL_SHT_TYPE SHT_RELA /* section header type */ 176 #define M_REL_ELF_TYPE ELF_T_RELA /* data buffer type */ 177 178 #else /* _ELF32 */ 179 #define M_REL_DT_TYPE DT_REL /* .dynamic entry */ 180 #define M_REL_DT_SIZE DT_RELSZ /* .dynamic entry */ 181 #define M_REL_DT_ENT DT_RELENT /* .dynamic entry */ 182 #define M_REL_DT_COUNT DT_RELCOUNT /* .dynamic entry */ 183 #define M_REL_SHT_TYPE SHT_REL /* section header type */ 184 #define M_REL_ELF_TYPE ELF_T_REL /* data buffer type */ 185 186 #endif /* ELF32 */ 187 188 /* 189 * Make common relocation types transparent to the common code 190 */ 191 #if defined(_ELF64) 192 #define M_R_NONE R_AMD64_NONE 193 #define M_R_GLOB_DAT R_AMD64_GLOB_DAT 194 #define M_R_COPY R_AMD64_COPY 195 #define M_R_RELATIVE R_AMD64_RELATIVE 196 #define M_R_JMP_SLOT R_AMD64_JUMP_SLOT 197 #define M_R_FPTR R_AMD64_NONE 198 #define M_R_ARRAYADDR R_AMD64_GLOB_DAT 199 #define M_R_NUM R_AMD64_NUM 200 #else 201 #define M_R_NONE R_386_NONE 202 #define M_R_GLOB_DAT R_386_GLOB_DAT 203 #define M_R_COPY R_386_COPY 204 #define M_R_RELATIVE R_386_RELATIVE 205 #define M_R_JMP_SLOT R_386_JMP_SLOT 206 #define M_R_FPTR R_386_NONE 207 #define M_R_ARRAYADDR R_386_GLOB_DAT 208 #define M_R_NUM R_386_NUM 209 #endif 210 211 /* 212 * The following are defined as M_R_NONE so that checks 213 * for these relocations can be performed in common code - although 214 * the checks are really only relevant to SPARC. 215 */ 216 #define M_R_REGISTER M_R_NONE 217 218 /* 219 * DT_REGISTER is not valid on i386 or amd64 220 */ 221 #define M_DT_REGISTER 0xffffffff 222 223 /* 224 * Make plt section information transparent to the common code. 225 */ 226 #define M_PLT_SHF_FLAGS (SHF_ALLOC | SHF_EXECINSTR) 227 228 /* 229 * Make data segment information transparent to the common code. 230 */ 231 #ifdef _ELF64 232 #define M_DATASEG_PERM (PF_R | PF_W) 233 #else 234 #define M_DATASEG_PERM (PF_R | PF_W | PF_X) 235 #endif 236 237 /* 238 * Define a set of identifies for special sections. These allow the sections 239 * to be ordered within the output file image. These values should be 240 * maintained consistently, where appropriate, in each platform specific header 241 * file. 242 * 243 * o null identifies that this section does not need to be added to the 244 * output image (ie. shared object sections or sections we're going to 245 * recreate (sym tables, string tables, relocations, etc.)). 246 * 247 * o any user defined section will be first in the associated segment. 248 * 249 * o interp and capabilities sections are next, as these are accessed 250 * immediately the first page of the image is mapped. 251 * 252 * o the syminfo, hash, dynsym, dynstr and rel's are grouped together as 253 * these will all be accessed first by ld.so.1 to perform relocations. 254 * 255 * o the got and dynamic are grouped together as these may also be 256 * accessed first by ld.so.1 to perform relocations, fill in DT_DEBUG 257 * (executables only), and .got[0]. 258 * 259 * o unknown sections (stabs, comments, etc.) go at the end. 260 * 261 * Note that .tlsbss/.bss are given the largest identifiers. This insures that 262 * if any unknown sections become associated to the same segment as the .bss, 263 * the .bss sections are always the last section in the segment. 264 */ 265 #define M_ID_NULL 0x00 266 #define M_ID_USER 0x01 267 268 #define M_ID_INTERP 0x03 /* SHF_ALLOC */ 269 #define M_ID_CAP 0x04 270 #define M_ID_UNWINDHDR 0x06 271 #define M_ID_UNWIND 0x07 272 #define M_ID_SYMINFO 0x08 273 #define M_ID_HASH 0x09 274 #define M_ID_LDYNSYM 0x0a /* always right before DYNSYM */ 275 #define M_ID_DYNSYM 0x0b 276 #define M_ID_DYNSTR 0x0c 277 #define M_ID_VERSION 0x0d 278 #define M_ID_DYNSORT 0x0e 279 #define M_ID_REL 0x0f 280 #define M_ID_PLT 0x10 /* SHF_ALLOC + SHF_EXECISNTR */ 281 #define M_ID_TEXT 0x11 282 #define M_ID_DATA 0x20 283 284 /* M_ID_USER 0x01 dual entry - listed above */ 285 #define M_ID_GOT 0x03 /* SHF_ALLOC + SHF_WRITE */ 286 #define M_ID_DYNAMIC 0x05 287 #define M_ID_ARRAY 0x06 288 /* M_ID_UNWIND 0x07 dual entry - listed above */ 289 290 #define M_ID_UNKNOWN 0xfb /* just before TLS */ 291 292 #define M_ID_TLS 0xfc /* just before bss */ 293 #define M_ID_TLSBSS 0xfd 294 #define M_ID_BSS 0xfe 295 #define M_ID_LBSS 0xff 296 297 #define M_ID_SYMTAB_NDX 0x02 /* ! SHF_ALLOC */ 298 #define M_ID_SYMTAB 0x03 299 #define M_ID_STRTAB 0x04 300 #define M_ID_DYNSYM_NDX 0x05 301 #define M_ID_NOTE 0x06 302 303 304 #ifdef __cplusplus 305 } 306 #endif 307 308 #endif /* _MACHDEP_X86_H */ 309