| 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, 2008 |
| 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 3, 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 | |
| 28 | struct fix; |
| 29 | |
| 30 | #define TARGET_BYTES_BIG_ENDIAN 0 |
| 31 | |
| 32 | #define TARGET_ARCH bfd_arch_i386 |
| 33 | #define TARGET_MACH (i386_mach ()) |
| 34 | extern 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)) |
| 75 | extern 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 |
| 88 | extern 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 | |
| 95 | extern const char extra_symbol_chars[]; |
| 96 | #define tc_symbol_chars extra_symbol_chars |
| 97 | |
| 98 | extern 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 in AT&T syntax or |
| 120 | memory operand size in Intel syntax. */ |
| 121 | #define WORD_MNEM_SUFFIX 'w' |
| 122 | #define BYTE_MNEM_SUFFIX 'b' |
| 123 | #define SHORT_MNEM_SUFFIX 's' |
| 124 | #define LONG_MNEM_SUFFIX 'l' |
| 125 | #define QWORD_MNEM_SUFFIX 'q' |
| 126 | #define XMMWORD_MNEM_SUFFIX 'x' |
| 127 | /* Intel Syntax. Use a non-ascii letter since since it never appears |
| 128 | in instructions. */ |
| 129 | #define LONG_DOUBLE_MNEM_SUFFIX '\1' |
| 130 | |
| 131 | #define END_OF_INSN '\0' |
| 132 | |
| 133 | /* |
| 134 | 'templates' is for grouping together 'template' structures for opcodes |
| 135 | of the same name. This is only used for storing the insns in the grand |
| 136 | ole hash table of insns. |
| 137 | The templates themselves start at START and range up to (but not including) |
| 138 | END. |
| 139 | */ |
| 140 | typedef struct |
| 141 | { |
| 142 | const template *start; |
| 143 | const template *end; |
| 144 | } |
| 145 | templates; |
| 146 | |
| 147 | /* 386 operand encoding bytes: see 386 book for details of this. */ |
| 148 | typedef struct |
| 149 | { |
| 150 | unsigned int regmem; /* codes register or memory operand */ |
| 151 | unsigned int reg; /* codes register operand (or extended opcode) */ |
| 152 | unsigned int mode; /* how to interpret regmem & reg */ |
| 153 | } |
| 154 | modrm_byte; |
| 155 | |
| 156 | /* x86-64 extension prefix. */ |
| 157 | typedef int rex_byte; |
| 158 | |
| 159 | /* The SSE5 instructions have a two bit instruction modifier (OC) that |
| 160 | is stored in two separate bytes in the instruction. Pick apart OC |
| 161 | into the 2 separate bits for instruction. */ |
| 162 | #define DREX_OC0(x) (((x) & 1) != 0) |
| 163 | #define DREX_OC1(x) (((x) & 2) != 0) |
| 164 | |
| 165 | #define DREX_OC0_MASK (1 << 3) /* set OC0 in byte 4 */ |
| 166 | #define DREX_OC1_MASK (1 << 2) /* set OC1 in byte 3 */ |
| 167 | |
| 168 | /* OC mappings */ |
| 169 | #define DREX_XMEM_X1_X2_X2 0 /* 4 op insn, dest = src3, src1 = reg/mem */ |
| 170 | #define DREX_X1_XMEM_X2_X2 1 /* 4 op insn, dest = src3, src2 = reg/mem */ |
| 171 | #define DREX_X1_XMEM_X2_X1 2 /* 4 op insn, dest = src1, src2 = reg/mem */ |
| 172 | #define DREX_X1_X2_XMEM_X1 3 /* 4 op insn, dest = src1, src3 = reg/mem */ |
| 173 | |
| 174 | #define DREX_XMEM_X1_X2 0 /* 3 op insn, src1 = reg/mem */ |
| 175 | #define DREX_X1_XMEM_X2 1 /* 3 op insn, src1 = reg/mem */ |
| 176 | |
| 177 | /* Information needed to create the DREX byte in SSE5 instructions. */ |
| 178 | typedef struct |
| 179 | { |
| 180 | unsigned int reg; /* register */ |
| 181 | unsigned int rex; /* REX flags */ |
| 182 | unsigned int modrm_reg; /* which arg goes in the modrm.reg field */ |
| 183 | unsigned int modrm_regmem; /* which arg goes in the modrm.regmem field */ |
| 184 | } drex_byte; |
| 185 | |
| 186 | /* 386 opcode byte to code indirect addressing. */ |
| 187 | typedef struct |
| 188 | { |
| 189 | unsigned base; |
| 190 | unsigned index; |
| 191 | unsigned scale; |
| 192 | } |
| 193 | sib_byte; |
| 194 | |
| 195 | enum processor_type |
| 196 | { |
| 197 | PROCESSOR_UNKNOWN, |
| 198 | PROCESSOR_I386, |
| 199 | PROCESSOR_I486, |
| 200 | PROCESSOR_PENTIUM, |
| 201 | PROCESSOR_PENTIUMPRO, |
| 202 | PROCESSOR_PENTIUM4, |
| 203 | PROCESSOR_NOCONA, |
| 204 | PROCESSOR_CORE, |
| 205 | PROCESSOR_CORE2, |
| 206 | PROCESSOR_K6, |
| 207 | PROCESSOR_ATHLON, |
| 208 | PROCESSOR_K8, |
| 209 | PROCESSOR_GENERIC32, |
| 210 | PROCESSOR_GENERIC64, |
| 211 | PROCESSOR_AMDFAM10 |
| 212 | }; |
| 213 | |
| 214 | /* x86 arch names, types and features */ |
| 215 | typedef struct |
| 216 | { |
| 217 | const char *name; /* arch name */ |
| 218 | enum processor_type type; /* arch type */ |
| 219 | i386_cpu_flags flags; /* cpu feature flags */ |
| 220 | } |
| 221 | arch_entry; |
| 222 | |
| 223 | /* The name of the global offset table generated by the compiler. Allow |
| 224 | this to be overridden if need be. */ |
| 225 | #ifndef GLOBAL_OFFSET_TABLE_NAME |
| 226 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
| 227 | #endif |
| 228 | |
| 229 | #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT) |
| 230 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES) |
| 231 | extern void x86_cons (expressionS *, int); |
| 232 | #endif |
| 233 | |
| 234 | #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP) |
| 235 | extern void x86_cons_fix_new |
| 236 | (fragS *, unsigned int, unsigned int, expressionS *); |
| 237 | |
| 238 | #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ |
| 239 | |
| 240 | #define NO_RELOC BFD_RELOC_NONE |
| 241 | |
| 242 | void i386_validate_fix (struct fix *); |
| 243 | #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX) |
| 244 | |
| 245 | #define tc_fix_adjustable(X) tc_i386_fix_adjustable(X) |
| 246 | extern int tc_i386_fix_adjustable (struct fix *); |
| 247 | |
| 248 | /* Values passed to md_apply_fix don't include the symbol value. */ |
| 249 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 250 | |
| 251 | /* ELF wants external syms kept, as does PE COFF. */ |
| 252 | #if defined (TE_PE) && defined (STRICT_PE_FORMAT) |
| 253 | #define EXTERN_FORCE_RELOC \ |
| 254 | (OUTPUT_FLAVOR == bfd_target_elf_flavour \ |
| 255 | || OUTPUT_FLAVOR == bfd_target_coff_flavour) |
| 256 | #else |
| 257 | #define EXTERN_FORCE_RELOC \ |
| 258 | (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 259 | #endif |
| 260 | |
| 261 | /* This expression evaluates to true if the relocation is for a local |
| 262 | object for which we still want to do the relocation at runtime. |
| 263 | False if we are willing to perform this relocation while building |
| 264 | the .o file. GOTOFF does not need to be checked here because it is |
| 265 | not pcrel. I am not sure if some of the others are ever used with |
| 266 | pcrel, but it is easier to be safe than sorry. */ |
| 267 | |
| 268 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ |
| 269 | (!(FIX)->fx_pcrel \ |
| 270 | || (FIX)->fx_r_type == BFD_RELOC_386_PLT32 \ |
| 271 | || (FIX)->fx_r_type == BFD_RELOC_386_GOT32 \ |
| 272 | || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC \ |
| 273 | || TC_FORCE_RELOCATION (FIX)) |
| 274 | |
| 275 | extern int i386_parse_name (char *, expressionS *, char *); |
| 276 | #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c) |
| 277 | |
| 278 | #define md_register_arithmetic 0 |
| 279 | |
| 280 | extern const struct relax_type md_relax_table[]; |
| 281 | #define TC_GENERIC_RELAX_TABLE md_relax_table |
| 282 | |
| 283 | extern int optimize_align_code; |
| 284 | |
| 285 | #define md_do_align(n, fill, len, max, around) \ |
| 286 | if ((n) \ |
| 287 | && !need_pass_2 \ |
| 288 | && optimize_align_code \ |
| 289 | && (!(fill) \ |
| 290 | || ((char)*(fill) == (char)0x90 && (len) == 1)) \ |
| 291 | && subseg_text_p (now_seg)) \ |
| 292 | { \ |
| 293 | frag_align_code ((n), (max)); \ |
| 294 | goto around; \ |
| 295 | } |
| 296 | |
| 297 | #define MAX_MEM_FOR_RS_ALIGN_CODE 31 |
| 298 | |
| 299 | extern void i386_align_code (fragS *, int); |
| 300 | |
| 301 | #define HANDLE_ALIGN(fragP) \ |
| 302 | if (fragP->fr_type == rs_align_code) \ |
| 303 | i386_align_code (fragP, (fragP->fr_next->fr_address \ |
| 304 | - fragP->fr_address \ |
| 305 | - fragP->fr_fix)); |
| 306 | |
| 307 | void i386_print_statistics (FILE *); |
| 308 | #define tc_print_statistics i386_print_statistics |
| 309 | |
| 310 | #define md_number_to_chars number_to_chars_littleendian |
| 311 | |
| 312 | #ifdef SCO_ELF |
| 313 | #define tc_init_after_args() sco_id () |
| 314 | extern void sco_id (void); |
| 315 | #endif |
| 316 | |
| 317 | #define WORKING_DOT_WORD 1 |
| 318 | |
| 319 | /* We want .cfi_* pseudo-ops for generating unwind info. */ |
| 320 | #define TARGET_USE_CFIPOP 1 |
| 321 | |
| 322 | extern unsigned int x86_dwarf2_return_column; |
| 323 | #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column |
| 324 | |
| 325 | extern int x86_cie_data_alignment; |
| 326 | #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment |
| 327 | |
| 328 | #define tc_regname_to_dw2regnum tc_x86_regname_to_dw2regnum |
| 329 | extern int tc_x86_regname_to_dw2regnum (char *); |
| 330 | |
| 331 | #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions |
| 332 | extern void tc_x86_frame_initial_instructions (void); |
| 333 | |
| 334 | #define md_elf_section_type(str,len) i386_elf_section_type (str, len) |
| 335 | extern int i386_elf_section_type (const char *, size_t); |
| 336 | |
| 337 | /* Support for SHF_X86_64_LARGE */ |
| 338 | extern int x86_64_section_word (char *, size_t); |
| 339 | extern int x86_64_section_letter (int, char **); |
| 340 | #define md_elf_section_letter(LETTER, PTR_MSG) x86_64_section_letter (LETTER, PTR_MSG) |
| 341 | #define md_elf_section_word(STR, LEN) x86_64_section_word (STR, LEN) |
| 342 | |
| 343 | #ifdef TE_PE |
| 344 | |
| 345 | #define O_secrel O_md1 |
| 346 | |
| 347 | #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset |
| 348 | void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int); |
| 349 | |
| 350 | #endif /* TE_PE */ |
| 351 | |
| 352 | #endif /* TC_I386 */ |