1 /* tc-i386.h -- Header file for tc-i386.c 2 Copyright (C) 1989-2022 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_IAMCU_FORMAT 84 #define ELF_TARGET_IAMCU_FORMAT "elf32-iamcu" 85 #endif 86 87 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \ 88 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \ 89 || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O)) 90 extern const char *i386_target_format (void); 91 #define TARGET_FORMAT i386_target_format () 92 #else 93 #ifdef TE_GO32 94 #define TARGET_FORMAT "coff-go32" 95 #endif 96 #ifdef OBJ_AOUT 97 #define TARGET_FORMAT AOUT_TARGET_FORMAT 98 #endif 99 #endif 100 101 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 102 103 /* '$' may be used as immediate prefix. */ 104 #undef LOCAL_LABELS_DOLLAR 105 #define LOCAL_LABELS_DOLLAR 0 106 #undef LOCAL_LABELS_FB 107 #define LOCAL_LABELS_FB 1 108 109 extern const char extra_symbol_chars[]; 110 #define tc_symbol_chars extra_symbol_chars 111 112 extern const char *i386_comment_chars; 113 #define tc_comment_chars i386_comment_chars 114 115 /* The name of the global offset table generated by the compiler. Allow 116 this to be overridden if need be. */ 117 #ifndef GLOBAL_OFFSET_TABLE_NAME 118 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 119 #endif 120 121 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES) 122 extern bfd_reloc_code_real_type x86_cons (expressionS *, int); 123 124 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \ 125 x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC) 126 extern void x86_cons_fix_new 127 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type); 128 129 #define X_PRECISION 5 130 #define X_PRECISION_PAD 0 131 132 #define TC_ADDRESS_BYTES x86_address_bytes 133 extern int x86_address_bytes (void); 134 135 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 136 137 #define NO_RELOC BFD_RELOC_NONE 138 139 int i386_validate_fix (struct fix *); 140 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) do { \ 141 if (!i386_validate_fix(FIX)) goto SKIP; \ 142 } while (0) 143 144 #define tc_fix_adjustable(X) tc_i386_fix_adjustable(X) 145 extern int tc_i386_fix_adjustable (struct fix *); 146 147 /* Values passed to md_apply_fix don't include the symbol value. */ 148 #define MD_APPLY_SYM_VALUE(FIX) 0 149 150 /* ELF wants external syms kept, as does PE COFF. */ 151 #if defined (TE_PE) && defined (STRICT_PE_FORMAT) 152 #define EXTERN_FORCE_RELOC \ 153 (OUTPUT_FLAVOR == bfd_target_elf_flavour \ 154 || OUTPUT_FLAVOR == bfd_target_coff_flavour) 155 #else 156 #define EXTERN_FORCE_RELOC \ 157 (OUTPUT_FLAVOR == bfd_target_elf_flavour) 158 #endif 159 160 /* This expression evaluates to true if the relocation is for a local 161 object for which we still want to do the relocation at runtime. 162 False if we are willing to perform this relocation while building 163 the .o file. GOTOFF and GOT32 do not need to be checked here because 164 they are not pcrel. .*/ 165 166 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 167 (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \ 168 || (FIX)->fx_r_type == BFD_RELOC_386_PLT32 \ 169 || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC \ 170 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \ 171 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \ 172 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX) 173 174 #define TC_FORCE_RELOCATION_ABS(FIX) \ 175 (TC_FORCE_RELOCATION (FIX) \ 176 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32 \ 177 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32X \ 178 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \ 179 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \ 180 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX) 181 182 extern int i386_parse_name (char *, expressionS *, char *); 183 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c) 184 185 extern operatorT i386_operator (const char *name, unsigned int operands, char *); 186 #define md_operator i386_operator 187 188 extern int i386_need_index_operator (void); 189 #define md_need_index_operator i386_need_index_operator 190 191 #define md_register_arithmetic 0 192 193 extern const struct relax_type md_relax_table[]; 194 #define TC_GENERIC_RELAX_TABLE md_relax_table 195 196 extern int optimize_align_code; 197 198 #define md_do_align(n, fill, len, max, around) \ 199 if ((n) \ 200 && !need_pass_2 \ 201 && optimize_align_code \ 202 && (!(fill) \ 203 || ((char)*(fill) == (char)0x90 && (len) == 1)) \ 204 && subseg_text_p (now_seg)) \ 205 { \ 206 frag_align_code ((n), (max)); \ 207 goto around; \ 208 } 209 210 #define MAX_MEM_FOR_RS_ALIGN_CODE \ 211 (alignment ? ((size_t) 1 << alignment) - 1 : (size_t) 1) 212 213 extern void i386_cons_align (int); 214 #define md_cons_align(nbytes) i386_cons_align (nbytes) 215 216 void i386_print_statistics (FILE *); 217 #define tc_print_statistics i386_print_statistics 218 219 extern unsigned int i386_frag_max_var (fragS *); 220 #define md_frag_max_var i386_frag_max_var 221 222 extern long i386_generic_table_relax_frag (segT, fragS *, long); 223 #define md_generic_table_relax_frag(segment, fragP, stretch) \ 224 i386_generic_table_relax_frag (segment, fragP, stretch) 225 226 #define md_number_to_chars number_to_chars_littleendian 227 228 enum processor_type 229 { 230 PROCESSOR_UNKNOWN, 231 PROCESSOR_GENERIC32, 232 PROCESSOR_GENERIC64, 233 PROCESSOR_I386, 234 PROCESSOR_I486, 235 PROCESSOR_PENTIUM, 236 PROCESSOR_PENTIUMPRO, 237 PROCESSOR_PENTIUM4, 238 PROCESSOR_NOCONA, 239 PROCESSOR_CORE, 240 PROCESSOR_CORE2, 241 PROCESSOR_COREI7, 242 PROCESSOR_IAMCU, 243 PROCESSOR_K6, 244 PROCESSOR_ATHLON, 245 PROCESSOR_K8, 246 PROCESSOR_AMDFAM10, 247 PROCESSOR_BD, 248 PROCESSOR_ZNVER, 249 PROCESSOR_BT, 250 /* Keep this last. */ 251 PROCESSOR_NONE 252 }; 253 254 extern enum processor_type cpu_arch_tune; 255 extern enum processor_type cpu_arch_isa; 256 extern i386_cpu_flags cpu_arch_isa_flags; 257 258 struct i386_tc_frag_data 259 { 260 union 261 { 262 fragS *padding_fragP; 263 fragS *branch_fragP; 264 } u; 265 addressT padding_address; 266 enum processor_type isa; 267 i386_cpu_flags isa_flags; 268 enum processor_type tune; 269 unsigned int max_bytes; 270 unsigned char length; 271 unsigned char last_length; 272 unsigned char max_prefix_length; 273 unsigned char prefix_length; 274 unsigned char default_prefix; 275 unsigned char cmp_size; 276 unsigned int mf_type : 3; 277 unsigned int classified : 1; 278 unsigned int branch_type : 3; 279 unsigned int code64 : 1; /* Only set by output_branch for now. */ 280 }; 281 282 /* We need to emit the right NOP pattern in .align frags. This is 283 done after the text-to-bits assembly pass, so we need to mark it with 284 the isa/tune settings at the time the .align was assembled. */ 285 #define TC_FRAG_TYPE struct i386_tc_frag_data 286 287 #define TC_FRAG_INIT(FRAGP, MAX_BYTES) \ 288 do \ 289 { \ 290 (FRAGP)->tc_frag_data.u.padding_fragP = NULL; \ 291 (FRAGP)->tc_frag_data.padding_address = 0; \ 292 (FRAGP)->tc_frag_data.isa = cpu_arch_isa; \ 293 (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags; \ 294 (FRAGP)->tc_frag_data.tune = cpu_arch_tune; \ 295 (FRAGP)->tc_frag_data.max_bytes = (MAX_BYTES); \ 296 (FRAGP)->tc_frag_data.length = 0; \ 297 (FRAGP)->tc_frag_data.last_length = 0; \ 298 (FRAGP)->tc_frag_data.max_prefix_length = 0; \ 299 (FRAGP)->tc_frag_data.prefix_length = 0; \ 300 (FRAGP)->tc_frag_data.default_prefix = 0; \ 301 (FRAGP)->tc_frag_data.cmp_size = 0; \ 302 (FRAGP)->tc_frag_data.classified = 0; \ 303 (FRAGP)->tc_frag_data.branch_type = 0; \ 304 (FRAGP)->tc_frag_data.mf_type = 0; \ 305 } \ 306 while (0) 307 308 #define WORKING_DOT_WORD 1 309 310 /* How to generate NOPs for .nop direct directive. */ 311 extern void i386_generate_nops (fragS *, char *, offsetT, int); 312 #define md_generate_nops(frag, where, amount, control) \ 313 i386_generate_nops ((frag), (where), (amount), (control)) 314 315 #define HANDLE_ALIGN(fragP) \ 316 if (fragP->fr_type == rs_align_code) \ 317 { \ 318 offsetT __count = (fragP->fr_next->fr_address \ 319 - fragP->fr_address \ 320 - fragP->fr_fix); \ 321 if (__count > 0 \ 322 && (unsigned int) __count <= fragP->tc_frag_data.max_bytes) \ 323 md_generate_nops (fragP, fragP->fr_literal + fragP->fr_fix, \ 324 __count, 0); \ 325 } 326 327 /* We want .cfi_* pseudo-ops for generating unwind info. */ 328 #define TARGET_USE_CFIPOP 1 329 330 extern unsigned int x86_dwarf2_return_column; 331 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column 332 333 extern int x86_cie_data_alignment; 334 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment 335 336 extern int x86_dwarf2_addr_size (void); 337 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size () 338 339 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum 340 extern void tc_x86_parse_to_dw2regnum (expressionS *); 341 342 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions 343 extern void tc_x86_frame_initial_instructions (void); 344 345 #define md_elf_section_type(str,len) i386_elf_section_type (str, len) 346 extern int i386_elf_section_type (const char *, size_t); 347 348 #ifdef TE_SOLARIS 349 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec) 350 extern void i386_solaris_fix_up_eh_frame (segT); 351 #endif 352 353 /* Support for SHF_X86_64_LARGE */ 354 extern bfd_vma x86_64_section_word (char *, size_t); 355 extern bfd_vma x86_64_section_letter (int, const char **); 356 #define md_elf_section_letter(LETTER, PTR_MSG) x86_64_section_letter (LETTER, PTR_MSG) 357 #define md_elf_section_word(STR, LEN) x86_64_section_word (STR, LEN) 358 359 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) 360 extern void x86_cleanup (void); 361 #define md_cleanup() x86_cleanup () 362 #endif 363 364 #ifdef TE_PE 365 366 #define O_secrel O_md1 367 368 #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset 369 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int); 370 371 #endif /* TE_PE */ 372 373 /* X_add_symbol:X_op_symbol (Intel mode only) */ 374 #define O_full_ptr O_md2 375 376 #ifdef OBJ_MACH_O 377 378 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX)) 379 380 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \ 381 (obj_mach_o_force_reloc_sub_same (FIX, SEG)) 382 383 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \ 384 (obj_mach_o_force_reloc_sub_local (FIX, SEG)) 385 386 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1 387 388 #endif /* OBJ_MACH_O */ 389 390 #endif /* TC_I386 */ 391