1 /* tc-i386.h -- Header file for tc-i386.c 2 Copyright (C) 1989-2021 Free Software Foundation, Inc. 3 4 This file is part of GAS, the GNU Assembler. 5 6 GAS is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GAS is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GAS; see the file COPYING. If not, write to the Free 18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 19 02110-1301, USA. */ 20 21 #ifndef TC_I386 22 #define TC_I386 1 23 24 #include "opcodes/i386-opc.h" 25 26 struct fix; 27 28 #define TARGET_BYTES_BIG_ENDIAN 0 29 30 #define TARGET_ARCH (i386_arch ()) 31 #define TARGET_MACH (i386_mach ()) 32 extern enum bfd_architecture i386_arch (void); 33 extern unsigned long i386_mach (void); 34 35 #ifdef TE_FreeBSD 36 #define AOUT_TARGET_FORMAT "a.out-i386-freebsd" 37 #endif 38 #ifdef TE_NetBSD 39 #define AOUT_TARGET_FORMAT "a.out-i386-netbsd" 40 #endif 41 #ifdef TE_386BSD 42 #define AOUT_TARGET_FORMAT "a.out-i386-bsd" 43 #endif 44 #ifdef TE_LINUX 45 #define AOUT_TARGET_FORMAT "a.out-i386-linux" 46 #endif 47 #ifdef TE_Mach 48 #define AOUT_TARGET_FORMAT "a.out-mach3" 49 #endif 50 #ifdef TE_DYNIX 51 #define AOUT_TARGET_FORMAT "a.out-i386-dynix" 52 #endif 53 #ifndef AOUT_TARGET_FORMAT 54 #define AOUT_TARGET_FORMAT "a.out-i386" 55 #endif 56 57 #ifdef TE_FreeBSD 58 #define ELF_TARGET_FORMAT "elf32-i386-freebsd" 59 #define ELF_TARGET_FORMAT64 "elf64-x86-64-freebsd" 60 #elif defined (TE_VXWORKS) 61 #define ELF_TARGET_FORMAT "elf32-i386-vxworks" 62 #elif defined TE_CLOUDABI 63 #define ELF_TARGET_FORMAT64 "elf64-x86-64-cloudabi" 64 #endif 65 66 #ifdef TE_SOLARIS 67 #define ELF_TARGET_FORMAT "elf32-i386-sol2" 68 #define ELF_TARGET_FORMAT64 "elf64-x86-64-sol2" 69 #endif 70 71 #ifndef ELF_TARGET_FORMAT 72 #define ELF_TARGET_FORMAT "elf32-i386" 73 #endif 74 75 #ifndef ELF_TARGET_FORMAT64 76 #define ELF_TARGET_FORMAT64 "elf64-x86-64" 77 #endif 78 79 #ifndef ELF_TARGET_FORMAT32 80 #define ELF_TARGET_FORMAT32 "elf32-x86-64" 81 #endif 82 83 #ifndef ELF_TARGET_L1OM_FORMAT 84 #define ELF_TARGET_L1OM_FORMAT "elf64-l1om" 85 #endif 86 87 #ifndef ELF_TARGET_K1OM_FORMAT 88 #define ELF_TARGET_K1OM_FORMAT "elf64-k1om" 89 #endif 90 91 #ifndef ELF_TARGET_IAMCU_FORMAT 92 #define ELF_TARGET_IAMCU_FORMAT "elf32-iamcu" 93 #endif 94 95 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \ 96 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \ 97 || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O)) 98 extern const char *i386_target_format (void); 99 #define TARGET_FORMAT i386_target_format () 100 #else 101 #ifdef TE_GO32 102 #define TARGET_FORMAT "coff-go32" 103 #endif 104 #ifdef OBJ_AOUT 105 #define TARGET_FORMAT AOUT_TARGET_FORMAT 106 #endif 107 #endif 108 109 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 110 111 /* '$' may be used as immediate prefix. */ 112 #undef LOCAL_LABELS_DOLLAR 113 #define LOCAL_LABELS_DOLLAR 0 114 #undef LOCAL_LABELS_FB 115 #define LOCAL_LABELS_FB 1 116 117 extern const char extra_symbol_chars[]; 118 #define tc_symbol_chars extra_symbol_chars 119 120 extern const char *i386_comment_chars; 121 #define tc_comment_chars i386_comment_chars 122 123 /* The name of the global offset table generated by the compiler. Allow 124 this to be overridden if need be. */ 125 #ifndef GLOBAL_OFFSET_TABLE_NAME 126 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 127 #endif 128 129 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES) 130 extern bfd_reloc_code_real_type x86_cons (expressionS *, int); 131 132 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \ 133 x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC) 134 extern void x86_cons_fix_new 135 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type); 136 137 #define TC_ADDRESS_BYTES x86_address_bytes 138 extern int x86_address_bytes (void); 139 140 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 141 142 #define NO_RELOC BFD_RELOC_NONE 143 144 int i386_validate_fix (struct fix *); 145 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) do { \ 146 if (!i386_validate_fix(FIX)) goto SKIP; \ 147 } while (0) 148 149 #define tc_fix_adjustable(X) tc_i386_fix_adjustable(X) 150 extern int tc_i386_fix_adjustable (struct fix *); 151 152 /* Values passed to md_apply_fix don't include the symbol value. */ 153 #define MD_APPLY_SYM_VALUE(FIX) 0 154 155 /* ELF wants external syms kept, as does PE COFF. */ 156 #if defined (TE_PE) && defined (STRICT_PE_FORMAT) 157 #define EXTERN_FORCE_RELOC \ 158 (OUTPUT_FLAVOR == bfd_target_elf_flavour \ 159 || OUTPUT_FLAVOR == bfd_target_coff_flavour) 160 #else 161 #define EXTERN_FORCE_RELOC \ 162 (OUTPUT_FLAVOR == bfd_target_elf_flavour) 163 #endif 164 165 /* This expression evaluates to true if the relocation is for a local 166 object for which we still want to do the relocation at runtime. 167 False if we are willing to perform this relocation while building 168 the .o file. GOTOFF and GOT32 do not need to be checked here because 169 they are not pcrel. .*/ 170 171 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 172 (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \ 173 || (FIX)->fx_r_type == BFD_RELOC_386_PLT32 \ 174 || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC \ 175 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \ 176 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \ 177 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX) 178 179 #define TC_FORCE_RELOCATION_ABS(FIX) \ 180 (TC_FORCE_RELOCATION (FIX) \ 181 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32 \ 182 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32X \ 183 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \ 184 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \ 185 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX) 186 187 extern int i386_parse_name (char *, expressionS *, char *); 188 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c) 189 190 extern operatorT i386_operator (const char *name, unsigned int operands, char *); 191 #define md_operator i386_operator 192 193 extern int i386_need_index_operator (void); 194 #define md_need_index_operator i386_need_index_operator 195 196 #define md_register_arithmetic 0 197 198 extern const struct relax_type md_relax_table[]; 199 #define TC_GENERIC_RELAX_TABLE md_relax_table 200 201 extern int optimize_align_code; 202 203 #define md_do_align(n, fill, len, max, around) \ 204 if ((n) \ 205 && !need_pass_2 \ 206 && optimize_align_code \ 207 && (!(fill) \ 208 || ((char)*(fill) == (char)0x90 && (len) == 1)) \ 209 && subseg_text_p (now_seg)) \ 210 { \ 211 frag_align_code ((n), (max)); \ 212 goto around; \ 213 } 214 215 #define MAX_MEM_FOR_RS_ALIGN_CODE (alignment ? ((1 << alignment) - 1) : 1) 216 217 extern void i386_cons_align (int); 218 #define md_cons_align(nbytes) i386_cons_align (nbytes) 219 220 void i386_print_statistics (FILE *); 221 #define tc_print_statistics i386_print_statistics 222 223 extern unsigned int i386_frag_max_var (fragS *); 224 #define md_frag_max_var i386_frag_max_var 225 226 extern long i386_generic_table_relax_frag (segT, fragS *, long); 227 #define md_generic_table_relax_frag(segment, fragP, stretch) \ 228 i386_generic_table_relax_frag (segment, fragP, stretch) 229 230 #define md_number_to_chars number_to_chars_littleendian 231 232 enum processor_type 233 { 234 PROCESSOR_UNKNOWN, 235 PROCESSOR_I386, 236 PROCESSOR_I486, 237 PROCESSOR_PENTIUM, 238 PROCESSOR_PENTIUMPRO, 239 PROCESSOR_PENTIUM4, 240 PROCESSOR_NOCONA, 241 PROCESSOR_CORE, 242 PROCESSOR_CORE2, 243 PROCESSOR_COREI7, 244 PROCESSOR_L1OM, 245 PROCESSOR_K1OM, 246 PROCESSOR_IAMCU, 247 PROCESSOR_K6, 248 PROCESSOR_ATHLON, 249 PROCESSOR_K8, 250 PROCESSOR_GENERIC32, 251 PROCESSOR_GENERIC64, 252 PROCESSOR_AMDFAM10, 253 PROCESSOR_BD, 254 PROCESSOR_ZNVER, 255 PROCESSOR_BT 256 }; 257 258 extern enum processor_type cpu_arch_tune; 259 extern enum processor_type cpu_arch_isa; 260 extern i386_cpu_flags cpu_arch_isa_flags; 261 262 struct i386_tc_frag_data 263 { 264 union 265 { 266 fragS *padding_fragP; 267 fragS *branch_fragP; 268 } u; 269 addressT padding_address; 270 enum processor_type isa; 271 i386_cpu_flags isa_flags; 272 enum processor_type tune; 273 unsigned int max_bytes; 274 unsigned char length; 275 unsigned char last_length; 276 unsigned char max_prefix_length; 277 unsigned char prefix_length; 278 unsigned char default_prefix; 279 unsigned char cmp_size; 280 unsigned int mf_type : 3; 281 unsigned int classified : 1; 282 unsigned int branch_type : 3; 283 }; 284 285 /* We need to emit the right NOP pattern in .align frags. This is 286 done after the text-to-bits assembly pass, so we need to mark it with 287 the isa/tune settings at the time the .align was assembled. */ 288 #define TC_FRAG_TYPE struct i386_tc_frag_data 289 290 #define TC_FRAG_INIT(FRAGP, MAX_BYTES) \ 291 do \ 292 { \ 293 (FRAGP)->tc_frag_data.u.padding_fragP = NULL; \ 294 (FRAGP)->tc_frag_data.padding_address = 0; \ 295 (FRAGP)->tc_frag_data.isa = cpu_arch_isa; \ 296 (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags; \ 297 (FRAGP)->tc_frag_data.tune = cpu_arch_tune; \ 298 (FRAGP)->tc_frag_data.max_bytes = (MAX_BYTES); \ 299 (FRAGP)->tc_frag_data.length = 0; \ 300 (FRAGP)->tc_frag_data.last_length = 0; \ 301 (FRAGP)->tc_frag_data.max_prefix_length = 0; \ 302 (FRAGP)->tc_frag_data.prefix_length = 0; \ 303 (FRAGP)->tc_frag_data.default_prefix = 0; \ 304 (FRAGP)->tc_frag_data.cmp_size = 0; \ 305 (FRAGP)->tc_frag_data.classified = 0; \ 306 (FRAGP)->tc_frag_data.branch_type = 0; \ 307 (FRAGP)->tc_frag_data.mf_type = 0; \ 308 } \ 309 while (0) 310 311 #define WORKING_DOT_WORD 1 312 313 /* How to generate NOPs for .nop direct directive. */ 314 extern void i386_generate_nops (fragS *, char *, offsetT, int); 315 #define md_generate_nops(frag, where, amount, control) \ 316 i386_generate_nops ((frag), (where), (amount), (control)) 317 318 #define HANDLE_ALIGN(fragP) \ 319 if (fragP->fr_type == rs_align_code) \ 320 { \ 321 offsetT __count = (fragP->fr_next->fr_address \ 322 - fragP->fr_address \ 323 - fragP->fr_fix); \ 324 if (__count > 0 \ 325 && (unsigned int) __count <= fragP->tc_frag_data.max_bytes) \ 326 md_generate_nops (fragP, fragP->fr_literal + fragP->fr_fix, \ 327 __count, 0); \ 328 } 329 330 /* We want .cfi_* pseudo-ops for generating unwind info. */ 331 #define TARGET_USE_CFIPOP 1 332 333 extern unsigned int x86_dwarf2_return_column; 334 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column 335 336 extern int x86_cie_data_alignment; 337 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment 338 339 extern int x86_dwarf2_addr_size (void); 340 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size () 341 342 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum 343 extern void tc_x86_parse_to_dw2regnum (expressionS *); 344 345 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions 346 extern void tc_x86_frame_initial_instructions (void); 347 348 #define md_elf_section_type(str,len) i386_elf_section_type (str, len) 349 extern int i386_elf_section_type (const char *, size_t); 350 351 #ifdef TE_SOLARIS 352 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec) 353 extern void i386_solaris_fix_up_eh_frame (segT); 354 #endif 355 356 /* Support for SHF_X86_64_LARGE */ 357 extern bfd_vma x86_64_section_word (char *, size_t); 358 extern bfd_vma x86_64_section_letter (int, const char **); 359 #define md_elf_section_letter(LETTER, PTR_MSG) x86_64_section_letter (LETTER, PTR_MSG) 360 #define md_elf_section_word(STR, LEN) x86_64_section_word (STR, LEN) 361 362 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) 363 extern void x86_cleanup (void); 364 #define md_cleanup() x86_cleanup () 365 #endif 366 367 #ifdef TE_PE 368 369 #define O_secrel O_md1 370 371 #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset 372 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int); 373 374 #endif /* TE_PE */ 375 376 /* X_add_symbol:X_op_symbol (Intel mode only) */ 377 #define O_full_ptr O_md2 378 379 #ifdef OBJ_MACH_O 380 381 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX)) 382 383 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \ 384 (obj_mach_o_force_reloc_sub_same (FIX, SEG)) 385 386 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \ 387 (obj_mach_o_force_reloc_sub_local (FIX, SEG)) 388 389 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1 390 391 #endif /* OBJ_MACH_O */ 392 393 #endif /* TC_I386 */ 394