1 /* tc-ppc.h -- Header file for tc-ppc.c. 2 Copyright (C) 1994-2020 Free Software Foundation, Inc. 3 Written by Ian Lance Taylor, Cygnus Support. 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GAS is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #define TC_PPC 23 24 #include "opcode/ppc.h" 25 26 struct fix; 27 28 /* Set the endianness we are using. Default to big endian. */ 29 #ifndef TARGET_BYTES_BIG_ENDIAN 30 #define TARGET_BYTES_BIG_ENDIAN 1 31 #endif 32 33 /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling 34 XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling 35 COFF for Windows NT. */ 36 37 #ifdef OBJ_COFF 38 #ifndef TE_PE 39 #define OBJ_XCOFF 40 #endif 41 #endif 42 43 /* The target BFD architecture. */ 44 #define TARGET_ARCH (ppc_arch ()) 45 #define TARGET_MACH (ppc_mach ()) 46 extern enum bfd_architecture ppc_arch (void); 47 extern unsigned long ppc_mach (void); 48 49 /* Whether or not the target is big endian */ 50 extern int target_big_endian; 51 52 /* The target BFD format. */ 53 #define TARGET_FORMAT (ppc_target_format ()) 54 extern const char *ppc_target_format (void); 55 56 /* Permit temporary numeric labels. */ 57 #define LOCAL_LABELS_FB 1 58 59 /* $ is used to refer to the current location. */ 60 #define DOLLAR_DOT 61 62 /* Strings do not use backslash escapes under COFF. */ 63 #ifdef OBJ_COFF 64 #define TC_STRING_ESCAPES 0 65 #endif 66 67 #ifdef OBJ_ELF 68 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 69 #endif 70 71 #if TARGET_BYTES_BIG_ENDIAN 72 #define PPC_BIG_ENDIAN 1 73 #else 74 #define PPC_BIG_ENDIAN 0 75 #endif 76 77 /* We don't need to handle .word strangely. */ 78 #define WORKING_DOT_WORD 79 80 #define MAX_MEM_FOR_RS_ALIGN_CODE 4 81 #define HANDLE_ALIGN(FRAGP) \ 82 if ((FRAGP)->fr_type == rs_align_code) \ 83 ppc_handle_align (FRAGP); 84 85 extern unsigned int ppc_nop_select (void); 86 #define NOP_OPCODE ppc_nop_select () 87 88 extern void ppc_handle_align (struct frag *); 89 extern void ppc_frag_check (struct frag *); 90 91 #ifdef OBJ_ELF 92 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 93 #endif 94 95 #define md_frag_check(FRAGP) ppc_frag_check (FRAGP) 96 97 /* Arrange to store the value of ppc_cpu at the site of a fixup 98 for later use in md_apply_fix. */ 99 struct _ppc_fix_extra 100 { 101 ppc_cpu_t ppc_cpu; 102 }; 103 104 extern ppc_cpu_t ppc_cpu; 105 106 #define TC_FIX_TYPE struct _ppc_fix_extra 107 #define TC_INIT_FIX_DATA(FIXP) \ 108 do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0) 109 110 #ifdef TE_PE 111 112 /* Question marks are permitted in symbol names. */ 113 #define LEX_QM 1 114 115 /* Don't adjust TOC relocs. */ 116 #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX) 117 extern int ppc_pe_fix_adjustable (struct fix *); 118 119 #endif 120 121 #ifdef OBJ_XCOFF 122 123 /* Declarations needed when generating XCOFF code. XCOFF is an 124 extension of COFF, used only on the RS/6000. Rather than create an 125 obj-xcoff, we just use obj-coff, and handle the extensions here in 126 tc-ppc. */ 127 128 /* We need to keep some information for symbols. */ 129 struct ppc_tc_sy 130 { 131 /* We keep a few linked lists of symbols. */ 132 symbolS *next; 133 /* The real name, if the symbol was renamed. */ 134 char *real_name; 135 /* Non-zero if the symbol should be output. The RS/6000 assembler 136 only outputs symbols that are external or are mentioned in a 137 .globl or .lglobl statement. */ 138 unsigned char output; 139 /* The symbol class. */ 140 short symbol_class; 141 /* For a csect or common symbol, the alignment to use. */ 142 unsigned char align; 143 /* For a csect symbol, the subsegment we are using. This is zero 144 for symbols that are not csects. */ 145 subsegT subseg; 146 /* For a csect symbol, the last symbol which has been defined in 147 this csect, or NULL if none have been defined so far. 148 For a .bs symbol, the referenced csect symbol. 149 For a label, the enclosing csect. */ 150 symbolS *within; 151 union 152 { 153 /* For a function symbol, a symbol whose value is the size. The 154 field is NULL if there is no size. */ 155 symbolS *size; 156 /* For a dwarf symbol, the corresponding dwarf subsection. */ 157 struct dw_subsection *dw; 158 } u; 159 }; 160 161 #define TC_SYMFIELD_TYPE struct ppc_tc_sy 162 163 /* We need an additional auxent for function symbols. */ 164 #define OBJ_COFF_MAX_AUXENTRIES 2 165 166 /* Square and curly brackets are permitted in symbol names. */ 167 #define LEX_BR 3 168 169 /* Canonicalize the symbol name. */ 170 #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) 171 extern char *ppc_canonicalize_symbol_name (char *); 172 173 /* Get the symbol class from the name. */ 174 #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) 175 extern void ppc_symbol_new_hook (symbolS *); 176 177 /* TOC relocs requires special handling. */ 178 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 179 extern int ppc_fix_adjustable (struct fix *); 180 181 /* We need to set the section VMA. */ 182 #define tc_frob_section(sec) ppc_frob_section (sec) 183 extern void ppc_frob_section (asection *); 184 185 /* Finish up the symbol. */ 186 #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) 187 extern int ppc_frob_symbol (symbolS *); 188 189 /* Finish up the entire symtab. */ 190 #define tc_adjust_symtab() ppc_adjust_symtab () 191 extern void ppc_adjust_symtab (void); 192 193 /* We also need to copy, in particular, the class of the symbol, 194 over what obj-coff would otherwise have copied. */ 195 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \ 196 do { \ 197 if (SF_GET_GET_SEGMENT (dest)) \ 198 S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \ 199 symbol_get_tc (dest)->u = symbol_get_tc (src)->u; \ 200 symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ 201 symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class; \ 202 symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ 203 } while (0) 204 205 extern void ppc_xcoff_end (void); 206 #define md_end ppc_xcoff_end 207 208 #endif /* OBJ_XCOFF */ 209 210 #define tc_new_dot_label(sym) ppc_new_dot_label (sym) 211 extern void ppc_new_dot_label (symbolS *); 212 213 extern const char ppc_symbol_chars[]; 214 #define tc_symbol_chars ppc_symbol_chars 215 216 #ifdef OBJ_ELF 217 218 /* Support for SHT_ORDERED */ 219 extern int ppc_section_type (char *, size_t); 220 extern int ppc_section_flags (flagword, bfd_vma, int); 221 222 #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN) 223 #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) 224 225 #define tc_comment_chars ppc_comment_chars 226 extern const char *ppc_comment_chars; 227 228 #define md_elf_section_letter ppc_elf_section_letter 229 extern bfd_vma ppc_elf_section_letter (int, const char **); 230 231 /* Keep relocations relative to the GOT, or non-PC relative. */ 232 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 233 extern int ppc_fix_adjustable (struct fix *); 234 235 /* Values passed to md_apply_fix don't include symbol values. */ 236 #define MD_APPLY_SYM_VALUE(FIX) 0 237 238 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \ 239 ppc_elf_parse_cons (EXP, NBYTES) 240 extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *, 241 unsigned int); 242 #define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \ 243 ppc_elf_cons_fix_check (EXP, NBYTES, FIX) 244 extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *); 245 246 #define tc_frob_file_before_adjust ppc_frob_file_before_adjust 247 extern void ppc_frob_file_before_adjust (void); 248 249 #define tc_adjust_symtab() ppc_elf_adjust_symtab () 250 extern void ppc_elf_adjust_symtab (void); 251 252 extern void ppc_elf_end (void); 253 #define md_end ppc_elf_end 254 255 #endif /* OBJ_ELF */ 256 257 #if defined (OBJ_ELF) || defined (OBJ_XCOFF) 258 #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) 259 extern int ppc_force_relocation (struct fix *); 260 #endif 261 262 #ifdef OBJ_ELF 263 /* Don't allow the generic code to convert fixups involving the 264 subtraction of a label in the current section to pc-relative if we 265 don't have the necessary pc-relative relocation. */ 266 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ 267 (!((FIX)->fx_r_type == BFD_RELOC_64 \ 268 || (FIX)->fx_r_type == BFD_RELOC_32 \ 269 || (FIX)->fx_r_type == BFD_RELOC_16 \ 270 || (FIX)->fx_r_type == BFD_RELOC_LO16 \ 271 || (FIX)->fx_r_type == BFD_RELOC_HI16 \ 272 || (FIX)->fx_r_type == BFD_RELOC_HI16_S \ 273 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGH \ 274 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHA \ 275 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHER \ 276 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHER_S \ 277 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHEST \ 278 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHEST_S \ 279 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHER34 \ 280 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHERA34 \ 281 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHEST34 \ 282 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHESTA34 \ 283 || (FIX)->fx_r_type == BFD_RELOC_PPC_16DX_HA \ 284 || (FIX)->fx_r_type == BFD_RELOC_PPC64_D34 \ 285 || (FIX)->fx_r_type == BFD_RELOC_PPC64_D28)) 286 #endif 287 288 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 0 289 290 /* Various frobbings of labels and their addresses. */ 291 #define md_start_line_hook() ppc_start_line_hook () 292 extern void ppc_start_line_hook (void); 293 294 /* Set the symbol class of a label based on the csect. */ 295 #define tc_frob_label(sym) ppc_frob_label (sym) 296 extern void ppc_frob_label (symbolS *); 297 298 /* call md_pcrel_from_section, not md_pcrel_from */ 299 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) 300 extern long md_pcrel_from_section (struct fix *, segT); 301 302 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) 303 extern int ppc_parse_name (const char *, struct expressionS *); 304 305 #define md_optimize_expr(left, op, right) ppc_optimize_expr (left, op, right) 306 extern int ppc_optimize_expr (expressionS *, operatorT, expressionS *); 307 308 #define md_operand(x) 309 310 #define md_cleanup() ppc_cleanup () 311 extern void ppc_cleanup (void); 312 313 #if (defined TE_AIX5 || defined TE_AIX \ 314 || defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX) 315 /* ppc uses different register numbers between .eh_frame and .debug_frame. 316 This macro translates the .eh_frame register numbers to .debug_frame 317 register numbers. */ 318 #define md_reg_eh_frame_to_debug_frame(regno) \ 319 ((regno) == 70 ? 64 /* cr2 */ \ 320 : (regno) == 65 ? 108 /* lr */ \ 321 : (regno) == 66 ? 109 /* ctr */ \ 322 : (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */ \ 323 : (regno) == 76 ? 101 /* xer */ \ 324 : (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */ \ 325 : (regno) == 109 ? 356 /* vrsave */ \ 326 : (regno) == 110 ? 67 /* vscr */ \ 327 : (regno) == 111 ? 99 /* spe_acc */ \ 328 : (regno) == 112 ? 612 /* spefscr */ \ 329 : (regno)) 330 #endif 331 332 #define TARGET_USE_CFIPOP 1 333 334 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions 335 extern void ppc_cfi_frame_initial_instructions (void); 336 337 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum 338 extern int tc_ppc_regname_to_dw2regnum (char *); 339 340 extern int ppc_cie_data_alignment; 341 342 extern int ppc_dwarf2_line_min_insn_length; 343 344 #define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length 345 #define DWARF2_DEFAULT_RETURN_COLUMN 0x41 346 #define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment 347 #define EH_FRAME_ALIGNMENT 2 348