1 /* tc-ppc.h -- Header file for tc-ppc.c. 2 Copyright (C) 1994-2016 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 NO_STRING_ESCAPES 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 void ppc_handle_align (struct frag *); 86 extern void ppc_frag_check (struct frag *); 87 88 #ifdef OBJ_ELF 89 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 90 #endif 91 92 #define md_frag_check(FRAGP) ppc_frag_check (FRAGP) 93 94 /* Arrange to store the value of ppc_cpu at the site of a fixup 95 for later use in md_apply_fix. */ 96 struct _ppc_fix_extra 97 { 98 ppc_cpu_t ppc_cpu; 99 }; 100 101 extern ppc_cpu_t ppc_cpu; 102 103 #define TC_FIX_TYPE struct _ppc_fix_extra 104 #define TC_INIT_FIX_DATA(FIXP) \ 105 do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0) 106 107 #ifdef TE_PE 108 109 /* Question marks are permitted in symbol names. */ 110 #define LEX_QM 1 111 112 /* Don't adjust TOC relocs. */ 113 #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX) 114 extern int ppc_pe_fix_adjustable (struct fix *); 115 116 #endif 117 118 #ifdef OBJ_XCOFF 119 120 /* Declarations needed when generating XCOFF code. XCOFF is an 121 extension of COFF, used only on the RS/6000. Rather than create an 122 obj-xcoff, we just use obj-coff, and handle the extensions here in 123 tc-ppc. */ 124 125 /* We need to keep some information for symbols. */ 126 struct ppc_tc_sy 127 { 128 /* We keep a few linked lists of symbols. */ 129 symbolS *next; 130 /* The real name, if the symbol was renamed. */ 131 char *real_name; 132 /* Non-zero if the symbol should be output. The RS/6000 assembler 133 only outputs symbols that are external or are mentioned in a 134 .globl or .lglobl statement. */ 135 unsigned char output; 136 /* The symbol class. */ 137 short symbol_class; 138 /* For a csect or common symbol, the alignment to use. */ 139 unsigned char align; 140 /* For a csect symbol, the subsegment we are using. This is zero 141 for symbols that are not csects. */ 142 subsegT subseg; 143 /* For a csect symbol, the last symbol which has been defined in 144 this csect, or NULL if none have been defined so far. 145 For a .bs symbol, the referenced csect symbol. 146 For a label, the enclosing csect. */ 147 symbolS *within; 148 union 149 { 150 /* For a function symbol, a symbol whose value is the size. The 151 field is NULL if there is no size. */ 152 symbolS *size; 153 /* For a dwarf symbol, the corresponding dwarf subsection. */ 154 struct dw_subsection *dw; 155 } u; 156 }; 157 158 #define TC_SYMFIELD_TYPE struct ppc_tc_sy 159 160 /* We need an additional auxent for function symbols. */ 161 #define OBJ_COFF_MAX_AUXENTRIES 2 162 163 /* Square and curly brackets are permitted in symbol names. */ 164 #define LEX_BR 3 165 166 /* Canonicalize the symbol name. */ 167 #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) 168 extern char *ppc_canonicalize_symbol_name (char *); 169 170 /* Get the symbol class from the name. */ 171 #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) 172 extern void ppc_symbol_new_hook (symbolS *); 173 174 /* Set the symbol class of a label based on the csect. */ 175 #define tc_frob_label(sym) ppc_frob_label (sym) 176 extern void ppc_frob_label (symbolS *); 177 178 /* TOC relocs requires special handling. */ 179 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 180 extern int ppc_fix_adjustable (struct fix *); 181 182 /* We need to set the section VMA. */ 183 #define tc_frob_section(sec) ppc_frob_section (sec) 184 extern void ppc_frob_section (asection *); 185 186 /* Finish up the symbol. */ 187 #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) 188 extern int ppc_frob_symbol (symbolS *); 189 190 /* Finish up the entire symtab. */ 191 #define tc_adjust_symtab() ppc_adjust_symtab () 192 extern void ppc_adjust_symtab (void); 193 194 /* We also need to copy, in particular, the class of the symbol, 195 over what obj-coff would otherwise have copied. */ 196 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \ 197 do { \ 198 if (SF_GET_GET_SEGMENT (dest)) \ 199 S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \ 200 symbol_get_tc (dest)->u = symbol_get_tc (src)->u; \ 201 symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ 202 symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class; \ 203 symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ 204 } while (0) 205 206 extern void ppc_xcoff_end (void); 207 #define md_end ppc_xcoff_end 208 209 #define tc_new_dot_label(sym) ppc_new_dot_label (sym) 210 extern void ppc_new_dot_label (symbolS *); 211 212 #endif /* OBJ_XCOFF */ 213 214 extern const char ppc_symbol_chars[]; 215 #define tc_symbol_chars ppc_symbol_chars 216 217 #ifdef OBJ_ELF 218 219 /* Support for SHT_ORDERED */ 220 extern int ppc_section_type (char *, size_t); 221 extern int ppc_section_flags (flagword, bfd_vma, int); 222 223 #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN) 224 #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) 225 226 #define tc_comment_chars ppc_comment_chars 227 extern const char *ppc_comment_chars; 228 229 /* Keep relocations relative to the GOT, or non-PC relative. */ 230 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 231 extern int ppc_fix_adjustable (struct fix *); 232 233 /* Values passed to md_apply_fix don't include symbol values. */ 234 #define MD_APPLY_SYM_VALUE(FIX) 0 235 236 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \ 237 ppc_elf_parse_cons (EXP, NBYTES) 238 extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *, 239 unsigned int); 240 #define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \ 241 ppc_elf_cons_fix_check (EXP, NBYTES, FIX) 242 extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *); 243 244 #define tc_frob_file_before_adjust ppc_frob_file_before_adjust 245 extern void ppc_frob_file_before_adjust (void); 246 247 #define tc_adjust_symtab() ppc_elf_adjust_symtab () 248 extern void ppc_elf_adjust_symtab (void); 249 250 extern void ppc_elf_end (void); 251 #define md_end ppc_elf_end 252 253 #endif /* OBJ_ELF */ 254 255 #if defined (OBJ_ELF) || defined (OBJ_XCOFF) 256 #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) 257 extern int ppc_force_relocation (struct fix *); 258 #endif 259 260 /* call md_pcrel_from_section, not md_pcrel_from */ 261 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) 262 extern long md_pcrel_from_section (struct fix *, segT); 263 264 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) 265 extern int ppc_parse_name (const char *, struct expressionS *); 266 267 #define md_operand(x) 268 269 #define md_cleanup() ppc_cleanup () 270 extern void ppc_cleanup (void); 271 272 #if (defined TE_AIX5 || defined TE_AIX \ 273 || defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX) 274 /* ppc uses different register numbers between .eh_frame and .debug_frame. 275 This macro translates the .eh_frame register numbers to .debug_frame 276 register numbers. */ 277 #define md_reg_eh_frame_to_debug_frame(regno) \ 278 ((regno) == 70 ? 64 /* cr2 */ \ 279 : (regno) == 65 ? 108 /* lr */ \ 280 : (regno) == 66 ? 109 /* ctr */ \ 281 : (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */ \ 282 : (regno) == 76 ? 101 /* xer */ \ 283 : (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */ \ 284 : (regno) == 109 ? 356 /* vrsave */ \ 285 : (regno) == 110 ? 67 /* vscr */ \ 286 : (regno) == 111 ? 99 /* spe_acc */ \ 287 : (regno) == 112 ? 612 /* spefscr */ \ 288 : (regno)) 289 #endif 290 291 #define TARGET_USE_CFIPOP 1 292 293 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions 294 extern void ppc_cfi_frame_initial_instructions (void); 295 296 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum 297 extern int tc_ppc_regname_to_dw2regnum (char *); 298 299 extern int ppc_cie_data_alignment; 300 301 extern int ppc_dwarf2_line_min_insn_length; 302 303 #define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length 304 #define DWARF2_DEFAULT_RETURN_COLUMN 0x41 305 #define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment 306