1 /* tc-i386.h -- Header file for tc-i386.c 2 Copyright (C) 1989-2024 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 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) 145 #define tc_fix_adjustable(X) tc_i386_fix_adjustable(X) 146 extern int tc_i386_fix_adjustable (struct fix *); 147 #else 148 #define tc_fix_adjustable(X) ((void)(X), 1) 149 #endif 150 151 /* Values passed to md_apply_fix don't include the symbol value. */ 152 #define MD_APPLY_SYM_VALUE(FIX) 0 153 154 /* ELF wants external syms kept, as does PE COFF. */ 155 #if defined (TE_PE) && defined (STRICT_PE_FORMAT) 156 #define EXTERN_FORCE_RELOC \ 157 (IS_ELF || OUTPUT_FLAVOR == bfd_target_coff_flavour) 158 #else 159 #define EXTERN_FORCE_RELOC IS_ELF 160 #endif 161 162 /* This expression evaluates to true if the relocation is for a local 163 object for which we still want to do the relocation at runtime. 164 False if we are willing to perform this relocation while building 165 the .o file. GOTOFF and GOT32 do not need to be checked here because 166 they are not pcrel. .*/ 167 168 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 169 (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \ 170 || (FIX)->fx_r_type == BFD_RELOC_386_PLT32 \ 171 || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC \ 172 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \ 173 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \ 174 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX \ 175 || (FIX)->fx_r_type == BFD_RELOC_X86_64_CODE_4_GOTPCRELX) 176 177 #define TC_FORCE_RELOCATION_ABS(FIX) \ 178 (TC_FORCE_RELOCATION (FIX) \ 179 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32 \ 180 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32X \ 181 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \ 182 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \ 183 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX \ 184 || (FIX)->fx_r_type == BFD_RELOC_X86_64_CODE_4_GOTPCRELX) 185 186 extern int i386_parse_name (char *, expressionS *, char *); 187 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c) 188 189 extern operatorT i386_operator (const char *name, unsigned int operands, char *); 190 #define md_operator i386_operator 191 192 extern int i386_need_index_operator (void); 193 #define md_need_index_operator i386_need_index_operator 194 195 #ifdef BFD64 196 extern bool i386_record_operator 197 (operatorT, const expressionS *, const expressionS *); 198 #define md_optimize_expr(l, o, r) i386_record_operator (o, l, r) 199 #endif 200 201 #define md_register_arithmetic 0 202 203 extern const struct relax_type md_relax_table[]; 204 #define TC_GENERIC_RELAX_TABLE md_relax_table 205 206 extern int optimize_align_code; 207 208 #define md_do_align(n, fill, len, max, around) \ 209 if ((n) \ 210 && !need_pass_2 \ 211 && optimize_align_code \ 212 && (!(fill) \ 213 || ((char)*(fill) == (char)0x90 && (len) == 1)) \ 214 && subseg_text_p (now_seg)) \ 215 { \ 216 frag_align_code ((n), (max)); \ 217 goto around; \ 218 } 219 220 #define MAX_MEM_FOR_RS_ALIGN_CODE \ 221 (alignment ? ((size_t) 1 << alignment) - 1 : (size_t) 1) 222 223 extern void i386_cons_align (int); 224 #define md_cons_align(nbytes) i386_cons_align (nbytes) 225 226 #if !defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) 227 #define md_section_align(seg, value) ((void)(seg), (value)) 228 #endif 229 230 void i386_print_statistics (FILE *); 231 #define tc_print_statistics i386_print_statistics 232 233 void i386_md_end (void); 234 #define md_end i386_md_end 235 236 extern unsigned int i386_frag_max_var (fragS *); 237 #define md_frag_max_var i386_frag_max_var 238 239 extern long i386_generic_table_relax_frag (segT, fragS *, long); 240 #define md_generic_table_relax_frag(segment, fragP, stretch) \ 241 i386_generic_table_relax_frag (segment, fragP, stretch) 242 243 #define md_number_to_chars number_to_chars_littleendian 244 245 enum processor_type 246 { 247 PROCESSOR_UNKNOWN, 248 PROCESSOR_GENERIC32, 249 PROCESSOR_GENERIC64, 250 PROCESSOR_I386, 251 PROCESSOR_I486, 252 PROCESSOR_PENTIUM, 253 PROCESSOR_I686, 254 PROCESSOR_PENTIUMPRO, 255 PROCESSOR_PENTIUM4, 256 PROCESSOR_NOCONA, 257 PROCESSOR_CORE, 258 PROCESSOR_CORE2, 259 PROCESSOR_COREI7, 260 PROCESSOR_IAMCU, 261 PROCESSOR_K6, 262 PROCESSOR_ATHLON, 263 PROCESSOR_K8, 264 PROCESSOR_AMDFAM10, 265 PROCESSOR_BD, 266 PROCESSOR_ZNVER, 267 PROCESSOR_BT, 268 /* Keep this last. */ 269 PROCESSOR_NONE 270 }; 271 272 extern i386_cpu_flags cpu_arch_flags; 273 extern enum processor_type cpu_arch_tune; 274 extern enum processor_type cpu_arch_isa; 275 extern i386_cpu_flags cpu_arch_isa_flags; 276 277 /* We support four different modes. I386_FLAG_CODE variable is used to 278 distinguish three of these. */ 279 280 extern enum i386_flag_code { 281 CODE_32BIT, 282 CODE_16BIT, 283 CODE_64BIT 284 } i386_flag_code; 285 286 struct i386_segment_info { 287 /* Type of previous "instruction", e.g. .byte or stand-alone prefix. */ 288 struct last_insn { 289 const char *file; 290 const char *name; 291 unsigned int line; 292 enum last_insn_kind 293 { 294 last_insn_other = 0, 295 last_insn_directive, 296 last_insn_prefix 297 } kind; 298 } last_insn; 299 subsegT subseg; 300 struct i386_segment_info *next; 301 }; 302 303 #define TC_SEGMENT_INFO_TYPE struct i386_segment_info 304 305 struct i386_tc_frag_data 306 { 307 union 308 { 309 fragS *padding_fragP; 310 fragS *branch_fragP; 311 } u; 312 addressT padding_address; 313 enum processor_type isa; 314 enum processor_type tune; 315 enum i386_flag_code code; 316 unsigned int max_bytes; 317 unsigned char length; 318 unsigned char last_length; 319 unsigned char max_prefix_length; 320 unsigned char prefix_length; 321 unsigned char default_prefix; 322 unsigned char cmp_size; 323 unsigned int mf_type : 3; 324 unsigned int classified : 1; 325 unsigned int branch_type : 3; 326 unsigned int cpunop : 1; 327 unsigned int isanop : 1; 328 unsigned int last_insn_normal : 1; 329 }; 330 331 /* We need to emit the right NOP pattern in .align frags. This is 332 done after the text-to-bits assembly pass, so we need to mark it with 333 the isa/tune settings at the time the .align was assembled. */ 334 #define TC_FRAG_TYPE struct i386_tc_frag_data 335 336 #define TC_FRAG_INIT(FRAGP, MAX_BYTES) \ 337 do \ 338 { \ 339 (FRAGP)->tc_frag_data.u.padding_fragP = NULL; \ 340 (FRAGP)->tc_frag_data.padding_address = 0; \ 341 (FRAGP)->tc_frag_data.isa = cpu_arch_isa; \ 342 (FRAGP)->tc_frag_data.tune = cpu_arch_tune; \ 343 (FRAGP)->tc_frag_data.cpunop = cpu_arch_flags.bitfield.cpunop; \ 344 (FRAGP)->tc_frag_data.isanop = cpu_arch_isa_flags.bitfield.cpunop; \ 345 (FRAGP)->tc_frag_data.code = i386_flag_code; \ 346 (FRAGP)->tc_frag_data.max_bytes = (MAX_BYTES); \ 347 (FRAGP)->tc_frag_data.length = 0; \ 348 (FRAGP)->tc_frag_data.last_length = 0; \ 349 (FRAGP)->tc_frag_data.max_prefix_length = 0; \ 350 (FRAGP)->tc_frag_data.prefix_length = 0; \ 351 (FRAGP)->tc_frag_data.default_prefix = 0; \ 352 (FRAGP)->tc_frag_data.cmp_size = 0; \ 353 (FRAGP)->tc_frag_data.classified = 0; \ 354 (FRAGP)->tc_frag_data.branch_type = 0; \ 355 (FRAGP)->tc_frag_data.mf_type = 0; \ 356 (FRAGP)->tc_frag_data.last_insn_normal \ 357 = (seg_info(now_seg)->tc_segment_info_data.last_insn.kind \ 358 == last_insn_other); \ 359 } \ 360 while (0) 361 362 #define WORKING_DOT_WORD 1 363 364 /* How to generate NOPs for .nop direct directive. */ 365 extern void i386_generate_nops (fragS *, char *, offsetT, int); 366 #define md_generate_nops(frag, where, amount, control) \ 367 i386_generate_nops ((frag), (where), (amount), (control)) 368 369 #define HANDLE_ALIGN(fragP) \ 370 if (fragP->fr_type == rs_align_code) \ 371 { \ 372 offsetT __count = (fragP->fr_next->fr_address \ 373 - fragP->fr_address \ 374 - fragP->fr_fix); \ 375 if (__count > 0 \ 376 && (unsigned int) __count <= fragP->tc_frag_data.max_bytes) \ 377 md_generate_nops (fragP, fragP->fr_literal + fragP->fr_fix, \ 378 __count, 0); \ 379 } 380 381 /* We want .cfi_* pseudo-ops for generating unwind info. */ 382 #define TARGET_USE_CFIPOP 1 383 384 extern unsigned int x86_dwarf2_return_column; 385 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column 386 387 extern int x86_cie_data_alignment; 388 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment 389 390 extern int x86_dwarf2_addr_size (void); 391 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size () 392 393 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum 394 extern void tc_x86_parse_to_dw2regnum (expressionS *); 395 396 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions 397 extern void tc_x86_frame_initial_instructions (void); 398 399 #define md_elf_section_type(str,len) i386_elf_section_type (str, len) 400 extern int i386_elf_section_type (const char *, size_t); 401 402 #define md_elf_section_change_hook i386_elf_section_change_hook 403 extern void i386_elf_section_change_hook (void); 404 405 #ifdef TE_SOLARIS 406 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec) 407 extern void i386_solaris_fix_up_eh_frame (segT); 408 #endif 409 410 /* Support for SHF_X86_64_LARGE */ 411 extern bfd_vma x86_64_section_letter (int, const char **); 412 #define md_elf_section_letter(LETTER, PTR_MSG) x86_64_section_letter (LETTER, PTR_MSG) 413 414 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) 415 extern void x86_cleanup (void); 416 #define md_cleanup() x86_cleanup () 417 418 #define TARGET_USE_GINSN 1 419 /* Allow GAS to synthesize DWARF CFI for hand-written asm. 420 PS: TARGET_USE_CFIPOP is a pre-condition. */ 421 #define TARGET_USE_SCFI 1 422 /* Identify the maximum DWARF register number of all the registers being 423 tracked for SCFI. This is the last DWARF register number of the set 424 of SP, BP, and all callee-saved registers. For AMD64, this means 425 R15 (15). Use SCFI_CALLEE_SAVED_REG_P to identify which registers 426 are callee-saved from this set. */ 427 #define SCFI_MAX_REG_ID 15 428 /* Identify the DWARF register number of the frame-pointer register. */ 429 #define REG_FP 6 430 /* Identify the DWARF register number of the stack-pointer register. */ 431 #define REG_SP 7 432 /* Some ABIs, like AMD64, use stack for call instruction. For such an ABI, 433 identify the initial (CFA) offset from RSP at the entry of function. */ 434 #define SCFI_INIT_CFA_OFFSET 8 435 436 #define SCFI_CALLEE_SAVED_REG_P(dw2reg) x86_scfi_callee_saved_p (dw2reg) 437 extern bool x86_scfi_callee_saved_p (uint32_t dw2reg_num); 438 439 /* Whether SFrame stack trace info is supported. */ 440 extern bool x86_support_sframe_p (void); 441 #define support_sframe_p x86_support_sframe_p 442 443 /* The stack-pointer register number for SFrame stack trace info. */ 444 extern unsigned int x86_sframe_cfa_sp_reg; 445 #define SFRAME_CFA_SP_REG x86_sframe_cfa_sp_reg 446 447 /* The frame-pointer register number for SFrame stack trace info. */ 448 extern unsigned int x86_sframe_cfa_fp_reg; 449 #define SFRAME_CFA_FP_REG x86_sframe_cfa_fp_reg 450 451 /* Specify if RA tracking is needed. */ 452 extern bool x86_sframe_ra_tracking_p (void); 453 #define sframe_ra_tracking_p x86_sframe_ra_tracking_p 454 455 /* Specify the fixed offset to recover RA from CFA. 456 (useful only when RA tracking is not needed). */ 457 extern offsetT x86_sframe_cfa_ra_offset (void); 458 #define sframe_cfa_ra_offset x86_sframe_cfa_ra_offset 459 460 /* The abi/arch indentifier for SFrame. */ 461 extern unsigned char x86_sframe_get_abi_arch (void); 462 #define sframe_get_abi_arch x86_sframe_get_abi_arch 463 464 #endif 465 466 #ifdef TE_PE 467 468 #define O_secrel O_md1 469 470 #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset 471 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int); 472 473 #endif /* TE_PE */ 474 475 /* X_add_symbol:X_op_symbol (Intel mode only) */ 476 #define O_full_ptr O_md2 477 478 #ifdef OBJ_MACH_O 479 480 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX)) 481 482 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \ 483 (obj_mach_o_force_reloc_sub_same (FIX, SEG)) 484 485 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \ 486 (obj_mach_o_force_reloc_sub_local (FIX, SEG)) 487 488 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1 489 490 #endif /* OBJ_MACH_O */ 491 492 #endif /* TC_I386 */ 493