1/* tc-i386.h -- Header file for tc-i386.c 2 Copyright 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 3 2001, 2002, 2003, 2004, 2005, 2006, 2007 4 Free Software Foundation, Inc. 5 6 This file is part of GAS, the GNU Assembler. 7 8 GAS is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2, or (at your option) 11 any later version. 12 13 GAS is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GAS; see the file COPYING. If not, write to the Free 20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 21 02110-1301, USA. */ 22 23#ifndef TC_I386 24#define TC_I386 1 25 26#include "opcodes/i386-opc.h" 27 28struct fix; 29 30#define TARGET_BYTES_BIG_ENDIAN 0 31 32#define TARGET_ARCH bfd_arch_i386 33#define TARGET_MACH (i386_mach ()) 34extern unsigned long i386_mach (void); 35 36#ifdef TE_FreeBSD 37#define AOUT_TARGET_FORMAT "a.out-i386-freebsd" 38#endif 39#ifdef TE_NetBSD 40#define AOUT_TARGET_FORMAT "a.out-i386-netbsd" 41#endif 42#ifdef TE_386BSD 43#define AOUT_TARGET_FORMAT "a.out-i386-bsd" 44#endif 45#ifdef TE_LINUX 46#define AOUT_TARGET_FORMAT "a.out-i386-linux" 47#endif 48#ifdef TE_Mach 49#define AOUT_TARGET_FORMAT "a.out-mach3" 50#endif 51#ifdef TE_DYNIX 52#define AOUT_TARGET_FORMAT "a.out-i386-dynix" 53#endif 54#ifndef AOUT_TARGET_FORMAT 55#define AOUT_TARGET_FORMAT "a.out-i386" 56#endif 57 58#ifdef TE_FreeBSD 59#define ELF_TARGET_FORMAT "elf32-i386-freebsd" 60#define ELF_TARGET_FORMAT64 "elf64-x86-64-freebsd" 61#elif defined (TE_VXWORKS) 62#define ELF_TARGET_FORMAT "elf32-i386-vxworks" 63#endif 64 65#ifndef ELF_TARGET_FORMAT 66#define ELF_TARGET_FORMAT "elf32-i386" 67#endif 68 69#ifndef ELF_TARGET_FORMAT64 70#define ELF_TARGET_FORMAT64 "elf64-x86-64" 71#endif 72 73#if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \ 74 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) 75extern const char *i386_target_format (void); 76#define TARGET_FORMAT i386_target_format () 77#else 78#ifdef OBJ_ELF 79#define TARGET_FORMAT ELF_TARGET_FORMAT 80#endif 81#ifdef OBJ_AOUT 82#define TARGET_FORMAT AOUT_TARGET_FORMAT 83#endif 84#endif 85 86#if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF)) 87#define md_end i386_elf_emit_arch_note 88extern void i386_elf_emit_arch_note (void); 89#endif 90 91#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 92 93#define LOCAL_LABELS_FB 1 94 95extern const char extra_symbol_chars[]; 96#define tc_symbol_chars extra_symbol_chars 97 98extern const char *i386_comment_chars; 99#define tc_comment_chars i386_comment_chars 100 101/* Prefixes will be emitted in the order defined below. 102 WAIT_PREFIX must be the first prefix since FWAIT is really is an 103 instruction, and so must come before any prefixes. 104 The preferred prefix order is SEG_PREFIX, ADDR_PREFIX, DATA_PREFIX, 105 LOCKREP_PREFIX. */ 106#define WAIT_PREFIX 0 107#define SEG_PREFIX 1 108#define ADDR_PREFIX 2 109#define DATA_PREFIX 3 110#define LOCKREP_PREFIX 4 111#define REX_PREFIX 5 /* must come last. */ 112#define MAX_PREFIXES 6 /* max prefixes per opcode */ 113 114/* we define the syntax here (modulo base,index,scale syntax) */ 115#define REGISTER_PREFIX '%' 116#define IMMEDIATE_PREFIX '$' 117#define ABSOLUTE_PREFIX '*' 118 119/* these are the instruction mnemonic suffixes. */ 120#define WORD_MNEM_SUFFIX 'w' 121#define BYTE_MNEM_SUFFIX 'b' 122#define SHORT_MNEM_SUFFIX 's' 123#define LONG_MNEM_SUFFIX 'l' 124#define QWORD_MNEM_SUFFIX 'q' 125/* Intel Syntax */ 126#define LONG_DOUBLE_MNEM_SUFFIX 'x' 127 128#define END_OF_INSN '\0' 129 130/* 131 'templates' is for grouping together 'template' structures for opcodes 132 of the same name. This is only used for storing the insns in the grand 133 ole hash table of insns. 134 The templates themselves start at START and range up to (but not including) 135 END. 136 */ 137typedef struct 138{ 139 const template *start; 140 const template *end; 141} 142templates; 143 144/* 386 operand encoding bytes: see 386 book for details of this. */ 145typedef struct 146{ 147 unsigned int regmem; /* codes register or memory operand */ 148 unsigned int reg; /* codes register operand (or extended opcode) */ 149 unsigned int mode; /* how to interpret regmem & reg */ 150} 151modrm_byte; 152 153/* x86-64 extension prefix. */ 154typedef int rex_byte; 155 156/* 386 opcode byte to code indirect addressing. */ 157typedef struct 158{ 159 unsigned base; 160 unsigned index; 161 unsigned scale; 162} 163sib_byte; 164 165enum processor_type 166{ 167 PROCESSOR_UNKNOWN, 168 PROCESSOR_I486, 169 PROCESSOR_PENTIUM, 170 PROCESSOR_PENTIUMPRO, 171 PROCESSOR_PENTIUM4, 172 PROCESSOR_NOCONA, 173 PROCESSOR_CORE, 174 PROCESSOR_CORE2, 175 PROCESSOR_K6, 176 PROCESSOR_ATHLON, 177 PROCESSOR_K8, 178 PROCESSOR_GENERIC32, 179 PROCESSOR_GENERIC64, 180 PROCESSOR_AMDFAM10 181}; 182 183/* x86 arch names, types and features */ 184typedef struct 185{ 186 const char *name; /* arch name */ 187 enum processor_type type; /* arch type */ 188 unsigned int flags; /* cpu feature flags */ 189} 190arch_entry; 191 192/* The name of the global offset table generated by the compiler. Allow 193 this to be overridden if need be. */ 194#ifndef GLOBAL_OFFSET_TABLE_NAME 195#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 196#endif 197 198#if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT) 199#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES) 200extern void x86_cons (expressionS *, int); 201#endif 202 203#define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP) 204extern void x86_cons_fix_new 205 (fragS *, unsigned int, unsigned int, expressionS *); 206 207#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 208 209#define NO_RELOC BFD_RELOC_NONE 210 211void i386_validate_fix (struct fix *); 212#define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX) 213 214#define tc_fix_adjustable(X) tc_i386_fix_adjustable(X) 215extern int tc_i386_fix_adjustable (struct fix *); 216 217/* Values passed to md_apply_fix don't include the symbol value. */ 218#define MD_APPLY_SYM_VALUE(FIX) 0 219 220/* ELF wants external syms kept, as does PE COFF. */ 221#if defined (TE_PE) && defined (STRICT_PE_FORMAT) 222#define EXTERN_FORCE_RELOC \ 223 (OUTPUT_FLAVOR == bfd_target_elf_flavour \ 224 || OUTPUT_FLAVOR == bfd_target_coff_flavour) 225#else 226#define EXTERN_FORCE_RELOC \ 227 (OUTPUT_FLAVOR == bfd_target_elf_flavour) 228#endif 229 230/* This expression evaluates to true if the relocation is for a local 231 object for which we still want to do the relocation at runtime. 232 False if we are willing to perform this relocation while building 233 the .o file. GOTOFF does not need to be checked here because it is 234 not pcrel. I am not sure if some of the others are ever used with 235 pcrel, but it is easier to be safe than sorry. */ 236 237#define TC_FORCE_RELOCATION_LOCAL(FIX) \ 238 (!(FIX)->fx_pcrel \ 239 || (FIX)->fx_r_type == BFD_RELOC_386_PLT32 \ 240 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32 \ 241 || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC \ 242 || TC_FORCE_RELOCATION (FIX)) 243 244extern int i386_parse_name (char *, expressionS *, char *); 245#define md_parse_name(s, e, m, c) i386_parse_name (s, e, c) 246 247extern const struct relax_type md_relax_table[]; 248#define TC_GENERIC_RELAX_TABLE md_relax_table 249 250extern int optimize_align_code; 251 252#define md_do_align(n, fill, len, max, around) \ 253if ((n) \ 254 && !need_pass_2 \ 255 && optimize_align_code \ 256 && (!(fill) \ 257 || ((char)*(fill) == (char)0x90 && (len) == 1)) \ 258 && subseg_text_p (now_seg)) \ 259 { \ 260 frag_align_code ((n), (max)); \ 261 goto around; \ 262 } 263 264#define MAX_MEM_FOR_RS_ALIGN_CODE 15 265 266extern void i386_align_code (fragS *, int); 267 268#define HANDLE_ALIGN(fragP) \ 269if (fragP->fr_type == rs_align_code) \ 270 i386_align_code (fragP, (fragP->fr_next->fr_address \ 271 - fragP->fr_address \ 272 - fragP->fr_fix)); 273 274void i386_print_statistics (FILE *); 275#define tc_print_statistics i386_print_statistics 276 277#define md_number_to_chars number_to_chars_littleendian 278 279#ifdef SCO_ELF 280#define tc_init_after_args() sco_id () 281extern void sco_id (void); 282#endif 283 284#define WORKING_DOT_WORD 1 285 286/* We want .cfi_* pseudo-ops for generating unwind info. */ 287#define TARGET_USE_CFIPOP 1 288 289extern unsigned int x86_dwarf2_return_column; 290#define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column 291 292extern int x86_cie_data_alignment; 293#define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment 294 295#define tc_regname_to_dw2regnum tc_x86_regname_to_dw2regnum 296extern int tc_x86_regname_to_dw2regnum (char *); 297 298#define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions 299extern void tc_x86_frame_initial_instructions (void); 300 301#define md_elf_section_type(str,len) i386_elf_section_type (str, len) 302extern int i386_elf_section_type (const char *, size_t); 303 304/* Support for SHF_X86_64_LARGE */ 305extern int x86_64_section_word (char *, size_t); 306extern int x86_64_section_letter (int, char **); 307#define md_elf_section_letter(LETTER, PTR_MSG) x86_64_section_letter (LETTER, PTR_MSG) 308#define md_elf_section_word(STR, LEN) x86_64_section_word (STR, LEN) 309 310#ifdef TE_PE 311 312#define O_secrel O_md1 313 314#define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset 315void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int); 316 317#endif /* TE_PE */ 318 319#endif /* TC_I386 */ 320